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/*
* Mesa 3-D graphics library
* Version: 7.6
*
* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* Meta operations. Some GL operations can be expressed in terms of
* other GL operations. For example, glBlitFramebuffer() can be done
* with texture mapping and glClear() can be done with polygon rendering.
*
* \author Brian Paul
*/
#include "main/glheader.h"
#include "main/mtypes.h"
#include "main/imports.h"
#include "main/arbprogram.h"
#include "main/arrayobj.h"
#include "main/blend.h"
#include "main/bufferobj.h"
#include "main/buffers.h"
#include "main/colortab.h"
#include "main/condrender.h"
#include "main/depth.h"
#include "main/enable.h"
#include "main/fbobject.h"
#include "main/feedback.h"
#include "main/formats.h"
#include "main/glformats.h"
#include "main/image.h"
#include "main/macros.h"
#include "main/matrix.h"
#include "main/mipmap.h"
#include "main/pixel.h"
#include "main/pbo.h"
#include "main/polygon.h"
#include "main/readpix.h"
#include "main/scissor.h"
#include "main/shaderapi.h"
#include "main/shaderobj.h"
#include "main/state.h"
#include "main/stencil.h"
#include "main/texobj.h"
#include "main/texenv.h"
#include "main/texgetimage.h"
#include "main/teximage.h"
#include "main/texparam.h"
#include "main/texstate.h"
#include "main/transformfeedback.h"
#include "main/uniforms.h"
#include "main/varray.h"
#include "main/viewport.h"
#include "main/samplerobj.h"
#include "program/program.h"
#include "swrast/swrast.h"
#include "drivers/common/meta.h"
#include "main/enums.h"
#include "main/glformats.h"
#include "../glsl/ralloc.h"
/** Return offset in bytes of the field within a vertex struct */
#define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD))
/**
* State which we may save/restore across meta ops.
* XXX this may be incomplete...
*/
struct save_state
{
GLbitfield SavedState; /**< bitmask of MESA_META_* flags */
/** MESA_META_ALPHA_TEST */
GLboolean AlphaEnabled;
GLenum AlphaFunc;
GLclampf AlphaRef;
/** MESA_META_BLEND */
GLbitfield BlendEnabled;
GLboolean ColorLogicOpEnabled;
/** MESA_META_COLOR_MASK */
GLubyte ColorMask[MAX_DRAW_BUFFERS][4];
/** MESA_META_DEPTH_TEST */
struct gl_depthbuffer_attrib Depth;
/** MESA_META_FOG */
GLboolean Fog;
/** MESA_META_PIXEL_STORE */
struct gl_pixelstore_attrib Pack, Unpack;
/** MESA_META_PIXEL_TRANSFER */
GLfloat RedBias, RedScale;
GLfloat GreenBias, GreenScale;
GLfloat BlueBias, BlueScale;
GLfloat AlphaBias, AlphaScale;
GLfloat DepthBias, DepthScale;
GLboolean MapColorFlag;
/** MESA_META_RASTERIZATION */
GLenum FrontPolygonMode, BackPolygonMode;
GLboolean PolygonOffset;
GLboolean PolygonSmooth;
GLboolean PolygonStipple;
GLboolean PolygonCull;
/** MESA_META_SCISSOR */
struct gl_scissor_attrib Scissor;
/** MESA_META_SHADER */
GLboolean VertexProgramEnabled;
struct gl_vertex_program *VertexProgram;
GLboolean FragmentProgramEnabled;
struct gl_fragment_program *FragmentProgram;
GLboolean ATIFragmentShaderEnabled;
struct gl_shader_program *VertexShader;
struct gl_shader_program *GeometryShader;
struct gl_shader_program *FragmentShader;
struct gl_shader_program *ActiveShader;
/** MESA_META_STENCIL_TEST */
struct gl_stencil_attrib Stencil;
/** MESA_META_TRANSFORM */
GLenum MatrixMode;
GLfloat ModelviewMatrix[16];
GLfloat ProjectionMatrix[16];
GLfloat TextureMatrix[16];
/** MESA_META_CLIP */
GLbitfield ClipPlanesEnabled;
/** MESA_META_TEXTURE */
GLuint ActiveUnit;
GLuint ClientActiveUnit;
/** for unit[0] only */
struct gl_texture_object *CurrentTexture[NUM_TEXTURE_TARGETS];
/** mask of TEXTURE_2D_BIT, etc */
GLbitfield TexEnabled[MAX_TEXTURE_UNITS];
GLbitfield TexGenEnabled[MAX_TEXTURE_UNITS];
GLuint EnvMode; /* unit[0] only */
/** MESA_META_VERTEX */
struct gl_array_object *ArrayObj;
struct gl_buffer_object *ArrayBufferObj;
/** MESA_META_VIEWPORT */
GLint ViewportX, ViewportY, ViewportW, ViewportH;
GLclampd DepthNear, DepthFar;
/** MESA_META_CLAMP_FRAGMENT_COLOR */
GLenum ClampFragmentColor;
/** MESA_META_CLAMP_VERTEX_COLOR */
GLenum ClampVertexColor;
/** MESA_META_CONDITIONAL_RENDER */
struct gl_query_object *CondRenderQuery;
GLenum CondRenderMode;
#if FEATURE_feedback
/** MESA_META_SELECT_FEEDBACK */
GLenum RenderMode;
struct gl_selection Select;
struct gl_feedback Feedback;
#endif
/** MESA_META_MULTISAMPLE */
GLboolean MultisampleEnabled;
/** Miscellaneous (always disabled) */
GLboolean Lighting;
GLboolean RasterDiscard;
#if FEATURE_EXT_transform_feedback
GLboolean TransformFeedbackNeedsResume;
#endif
};
/**
* Temporary texture used for glBlitFramebuffer, glDrawPixels, etc.
* This is currently shared by all the meta ops. But we could create a
* separate one for each of glDrawPixel, glBlitFramebuffer, glCopyPixels, etc.
*/
struct temp_texture
{
GLuint TexObj;
GLenum Target; /**< GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE */
GLsizei MinSize; /**< Min texture size to allocate */
GLsizei MaxSize; /**< Max possible texture size */
GLboolean NPOT; /**< Non-power of two size OK? */
GLsizei Width, Height; /**< Current texture size */
GLenum IntFormat;
GLfloat Sright, Ttop; /**< right, top texcoords */
};
/**
* State for glBlitFramebufer()
*/
struct blit_state
{
GLuint ArrayObj;
GLuint VBO;
GLuint DepthFP;
};
/**
* State for glClear()
*/
struct clear_state
{
GLuint ArrayObj;
GLuint VBO;
GLuint ShaderProg;
GLint ColorLocation;
GLuint IntegerShaderProg;
GLint IntegerColorLocation;
};
/**
* State for glCopyPixels()
*/
struct copypix_state
{
GLuint ArrayObj;
GLuint VBO;
};
/**
* State for glDrawPixels()
*/
struct drawpix_state
{
GLuint ArrayObj;
GLuint StencilFP; /**< Fragment program for drawing stencil images */
GLuint DepthFP; /**< Fragment program for drawing depth images */
};
/**
* State for glBitmap()
*/
struct bitmap_state
{
GLuint ArrayObj;
GLuint VBO;
struct temp_texture Tex; /**< separate texture from other meta ops */
};
/**
* State for GLSL texture sampler which is used to generate fragment
* shader in _mesa_meta_generate_mipmap().
*/
struct glsl_sampler {
const char *type;
const char *func;
const char *texcoords;
GLuint shader_prog;
};
/**
* State for _mesa_meta_generate_mipmap()
*/
struct gen_mipmap_state
{
GLuint ArrayObj;
GLuint VBO;
GLuint FBO;
GLuint Sampler;
GLuint ShaderProg;
struct glsl_sampler sampler_1d;
struct glsl_sampler sampler_2d;
struct glsl_sampler sampler_3d;
struct glsl_sampler sampler_cubemap;
struct glsl_sampler sampler_1d_array;
struct glsl_sampler sampler_2d_array;
};
/**
* State for texture decompression
*/
struct decompress_state
{
GLuint ArrayObj;
GLuint VBO, FBO, RBO, Sampler;
GLint Width, Height;
};
/**
* State for glDrawTex()
*/
struct drawtex_state
{
GLuint ArrayObj;
GLuint VBO;
};
#define MAX_META_OPS_DEPTH 8
/**
* All per-context meta state.
*/
struct gl_meta_state
{
/** Stack of state saved during meta-ops */
struct save_state Save[MAX_META_OPS_DEPTH];
/** Save stack depth */
GLuint SaveStackDepth;
struct temp_texture TempTex;
struct blit_state Blit; /**< For _mesa_meta_BlitFramebuffer() */
struct clear_state Clear; /**< For _mesa_meta_Clear() */
struct copypix_state CopyPix; /**< For _mesa_meta_CopyPixels() */
struct drawpix_state DrawPix; /**< For _mesa_meta_DrawPixels() */
struct bitmap_state Bitmap; /**< For _mesa_meta_Bitmap() */
struct gen_mipmap_state Mipmap; /**< For _mesa_meta_GenerateMipmap() */
struct decompress_state Decompress; /**< For texture decompression */
struct drawtex_state DrawTex; /**< For _mesa_meta_DrawTex() */
};
static void meta_glsl_blit_cleanup(struct gl_context *ctx, struct blit_state *blit);
static void cleanup_temp_texture(struct gl_context *ctx, struct temp_texture *tex);
static void meta_glsl_clear_cleanup(struct gl_context *ctx, struct clear_state *clear);
static void meta_glsl_generate_mipmap_cleanup(struct gl_context *ctx,
struct gen_mipmap_state *mipmap);
static GLuint
compile_shader_with_debug(struct gl_context *ctx, GLenum target, const GLcharARB *source)
{
GLuint shader;
GLint ok, size;
GLchar *info;
shader = _mesa_CreateShaderObjectARB(target);
_mesa_ShaderSourceARB(shader, 1, &source, NULL);
_mesa_CompileShaderARB(shader);
_mesa_GetShaderiv(shader, GL_COMPILE_STATUS, &ok);
if (ok)
return shader;
_mesa_GetShaderiv(shader, GL_INFO_LOG_LENGTH, &size);
if (size == 0) {
_mesa_DeleteObjectARB(shader);
return 0;
}
info = malloc(size);
if (!info) {
_mesa_DeleteObjectARB(shader);
return 0;
}
_mesa_GetProgramInfoLog(shader, size, NULL, info);
_mesa_problem(ctx,
"meta program compile failed:\n%s\n"
"source:\n%s\n",
info, source);
free(info);
_mesa_DeleteObjectARB(shader);
return 0;
}
static GLuint
link_program_with_debug(struct gl_context *ctx, GLuint program)
{
GLint ok, size;
GLchar *info;
_mesa_LinkProgramARB(program);
_mesa_GetProgramiv(program, GL_LINK_STATUS, &ok);
if (ok)
return program;
_mesa_GetProgramiv(program, GL_INFO_LOG_LENGTH, &size);
if (size == 0)
return 0;
info = malloc(size);
if (!info)
return 0;
_mesa_GetProgramInfoLog(program, size, NULL, info);
_mesa_problem(ctx, "meta program link failed:\n%s", info);
free(info);
return 0;
}
/**
* Initialize meta-ops for a context.
* To be called once during context creation.
*/
void
_mesa_meta_init(struct gl_context *ctx)
{
ASSERT(!ctx->Meta);
ctx->Meta = CALLOC_STRUCT(gl_meta_state);
}
/**
* Free context meta-op state.
* To be called once during context destruction.
*/
void
_mesa_meta_free(struct gl_context *ctx)
{
GET_CURRENT_CONTEXT(old_context);
_mesa_make_current(ctx, NULL, NULL);
meta_glsl_blit_cleanup(ctx, &ctx->Meta->Blit);
meta_glsl_clear_cleanup(ctx, &ctx->Meta->Clear);
meta_glsl_generate_mipmap_cleanup(ctx, &ctx->Meta->Mipmap);
cleanup_temp_texture(ctx, &ctx->Meta->TempTex);
if (old_context)
_mesa_make_current(old_context, old_context->WinSysDrawBuffer, old_context->WinSysReadBuffer);
else
_mesa_make_current(NULL, NULL, NULL);
free(ctx->Meta);
ctx->Meta = NULL;
}
/**
* This is an alternative to _mesa_set_enable() to handle some special cases.
* See comments inside.
*/
static void
meta_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
{
switch (cap) {
case GL_MULTISAMPLE:
/* We need to enable/disable multisample when using GLES but this enum
* is not supported there.
*/
if (ctx->Multisample.Enabled == state)
return;
FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
ctx->Multisample.Enabled = state;
break;
default:
_mesa_problem(ctx, "Unexpected cap in _meta_set_enable()");
return;
}
if (ctx->Driver.Enable) {
ctx->Driver.Enable(ctx, cap, state);
}
}
/**
* Enter meta state. This is like a light-weight version of glPushAttrib
* but it also resets most GL state back to default values.
*
* \param state bitmask of MESA_META_* flags indicating which attribute groups
* to save and reset to their defaults
*/
void
_mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
{
struct save_state *save;
/* hope MAX_META_OPS_DEPTH is large enough */
assert(ctx->Meta->SaveStackDepth < MAX_META_OPS_DEPTH);
save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth++];
memset(save, 0, sizeof(*save));
save->SavedState = state;
#if FEATURE_EXT_transform_feedback
/* Pausing transform feedback needs to be done early, or else we won't be
* able to change other state.
*/
save->TransformFeedbackNeedsResume =
ctx->TransformFeedback.CurrentObject->Active &&
!ctx->TransformFeedback.CurrentObject->Paused;
if (save->TransformFeedbackNeedsResume)
_mesa_PauseTransformFeedback();
#endif
if (state & MESA_META_ALPHA_TEST) {
save->AlphaEnabled = ctx->Color.AlphaEnabled;
save->AlphaFunc = ctx->Color.AlphaFunc;
save->AlphaRef = ctx->Color.AlphaRef;
if (ctx->Color.AlphaEnabled)
_mesa_set_enable(ctx, GL_ALPHA_TEST, GL_FALSE);
}
if (state & MESA_META_BLEND) {
save->BlendEnabled = ctx->Color.BlendEnabled;
if (ctx->Color.BlendEnabled) {
if (ctx->Extensions.EXT_draw_buffers2) {
GLuint i;
for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
_mesa_set_enablei(ctx, GL_BLEND, i, GL_FALSE);
}
}
else {
_mesa_set_enable(ctx, GL_BLEND, GL_FALSE);
}
}
save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled;
if (ctx->Color.ColorLogicOpEnabled)
_mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, GL_FALSE);
}
if (state & MESA_META_COLOR_MASK) {
memcpy(save->ColorMask, ctx->Color.ColorMask,
sizeof(ctx->Color.ColorMask));
if (!ctx->Color.ColorMask[0][0] ||
!ctx->Color.ColorMask[0][1] ||
!ctx->Color.ColorMask[0][2] ||
!ctx->Color.ColorMask[0][3])
_mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
}
if (state & MESA_META_DEPTH_TEST) {
save->Depth = ctx->Depth; /* struct copy */
if (ctx->Depth.Test)
_mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
}
if ((state & MESA_META_FOG)
&& ctx->API != API_OPENGL_CORE
&& ctx->API != API_OPENGLES2) {
save->Fog = ctx->Fog.Enabled;
if (ctx->Fog.Enabled)
_mesa_set_enable(ctx, GL_FOG, GL_FALSE);
}
if (state & MESA_META_PIXEL_STORE) {
save->Pack = ctx->Pack;
save->Unpack = ctx->Unpack;
ctx->Pack = ctx->DefaultPacking;
ctx->Unpack = ctx->DefaultPacking;
}
if (state & MESA_META_PIXEL_TRANSFER) {
save->RedScale = ctx->Pixel.RedScale;
save->RedBias = ctx->Pixel.RedBias;
save->GreenScale = ctx->Pixel.GreenScale;
save->GreenBias = ctx->Pixel.GreenBias;
save->BlueScale = ctx->Pixel.BlueScale;
save->BlueBias = ctx->Pixel.BlueBias;
save->AlphaScale = ctx->Pixel.AlphaScale;
save->AlphaBias = ctx->Pixel.AlphaBias;
save->MapColorFlag = ctx->Pixel.MapColorFlag;
ctx->Pixel.RedScale = 1.0F;
ctx->Pixel.RedBias = 0.0F;
ctx->Pixel.GreenScale = 1.0F;
ctx->Pixel.GreenBias = 0.0F;
ctx->Pixel.BlueScale = 1.0F;
ctx->Pixel.BlueBias = 0.0F;
ctx->Pixel.AlphaScale = 1.0F;
ctx->Pixel.AlphaBias = 0.0F;
ctx->Pixel.MapColorFlag = GL_FALSE;
/* XXX more state */
ctx->NewState |=_NEW_PIXEL;
}
if (state & MESA_META_RASTERIZATION) {
save->FrontPolygonMode = ctx->Polygon.FrontMode;
save->BackPolygonMode = ctx->Polygon.BackMode;
save->PolygonOffset = ctx->Polygon.OffsetFill;
save->PolygonSmooth = ctx->Polygon.SmoothFlag;
save->PolygonStipple = ctx->Polygon.StippleFlag;
save->PolygonCull = ctx->Polygon.CullFlag;
_mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
_mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, GL_FALSE);
if (ctx->API == API_OPENGL) {
_mesa_set_enable(ctx, GL_POLYGON_SMOOTH, GL_FALSE);
_mesa_set_enable(ctx, GL_POLYGON_STIPPLE, GL_FALSE);
}
_mesa_set_enable(ctx, GL_CULL_FACE, GL_FALSE);
}
if (state & MESA_META_SCISSOR) {
save->Scissor = ctx->Scissor; /* struct copy */
_mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_FALSE);
}
if (state & MESA_META_SHADER) {
if (ctx->API == API_OPENGL && ctx->Extensions.ARB_vertex_program) {
save->VertexProgramEnabled = ctx->VertexProgram.Enabled;
_mesa_reference_vertprog(ctx, &save->VertexProgram,
ctx->VertexProgram.Current);
_mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB, GL_FALSE);
}
if (ctx->API == API_OPENGL && ctx->Extensions.ARB_fragment_program) {
save->FragmentProgramEnabled = ctx->FragmentProgram.Enabled;
_mesa_reference_fragprog(ctx, &save->FragmentProgram,
ctx->FragmentProgram.Current);
_mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_FALSE);
}
if (ctx->API == API_OPENGL && ctx->Extensions.ATI_fragment_shader) {
save->ATIFragmentShaderEnabled = ctx->ATIFragmentShader.Enabled;
_mesa_set_enable(ctx, GL_FRAGMENT_SHADER_ATI, GL_FALSE);
}
if (ctx->Extensions.ARB_shader_objects) {
_mesa_reference_shader_program(ctx, &save->VertexShader,
ctx->Shader.CurrentVertexProgram);
_mesa_reference_shader_program(ctx, &save->GeometryShader,
ctx->Shader.CurrentGeometryProgram);
_mesa_reference_shader_program(ctx, &save->FragmentShader,
ctx->Shader.CurrentFragmentProgram);
_mesa_reference_shader_program(ctx, &save->ActiveShader,
ctx->Shader.ActiveProgram);
_mesa_UseProgramObjectARB(0);
}
}
if (state & MESA_META_STENCIL_TEST) {
save->Stencil = ctx->Stencil; /* struct copy */
if (ctx->Stencil.Enabled)
_mesa_set_enable(ctx, GL_STENCIL_TEST, GL_FALSE);
/* NOTE: other stencil state not reset */
}
if (state & MESA_META_TEXTURE) {
GLuint u, tgt;
save->ActiveUnit = ctx->Texture.CurrentUnit;
save->ClientActiveUnit = ctx->Array.ActiveTexture;
save->EnvMode = ctx->Texture.Unit[0].EnvMode;
/* Disable all texture units */
if (ctx->API == API_OPENGL || ctx->API == API_OPENGLES) {
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
save->TexEnabled[u] = ctx->Texture.Unit[u].Enabled;
save->TexGenEnabled[u] = ctx->Texture.Unit[u].TexGenEnabled;
if (ctx->Texture.Unit[u].Enabled ||
ctx->Texture.Unit[u].TexGenEnabled) {
_mesa_ActiveTextureARB(GL_TEXTURE0 + u);
_mesa_set_enable(ctx, GL_TEXTURE_2D, GL_FALSE);
if (ctx->Extensions.ARB_texture_cube_map)
_mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_FALSE);
if (ctx->Extensions.OES_EGL_image_external)
_mesa_set_enable(ctx, GL_TEXTURE_EXTERNAL_OES, GL_FALSE);
if (ctx->API == API_OPENGL) {
_mesa_set_enable(ctx, GL_TEXTURE_1D, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_3D, GL_FALSE);
if (ctx->Extensions.NV_texture_rectangle)
_mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
} else {
_mesa_set_enable(ctx, GL_TEXTURE_GEN_STR_OES, GL_FALSE);
}
}
}
}
/* save current texture objects for unit[0] only */
for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
_mesa_reference_texobj(&save->CurrentTexture[tgt],
ctx->Texture.Unit[0].CurrentTex[tgt]);
}
/* set defaults for unit[0] */
_mesa_ActiveTextureARB(GL_TEXTURE0);
_mesa_ClientActiveTextureARB(GL_TEXTURE0);
if (ctx->API == API_OPENGL || ctx->API == API_OPENGLES) {
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
}
if (state & MESA_META_TRANSFORM) {
GLuint activeTexture = ctx->Texture.CurrentUnit;
memcpy(save->ModelviewMatrix, ctx->ModelviewMatrixStack.Top->m,
16 * sizeof(GLfloat));
memcpy(save->ProjectionMatrix, ctx->ProjectionMatrixStack.Top->m,
16 * sizeof(GLfloat));
memcpy(save->TextureMatrix, ctx->TextureMatrixStack[0].Top->m,
16 * sizeof(GLfloat));
save->MatrixMode = ctx->Transform.MatrixMode;
/* set 1:1 vertex:pixel coordinate transform */
_mesa_ActiveTextureARB(GL_TEXTURE0);
_mesa_MatrixMode(GL_TEXTURE);
_mesa_LoadIdentity();
_mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
_mesa_MatrixMode(GL_MODELVIEW);
_mesa_LoadIdentity();
_mesa_MatrixMode(GL_PROJECTION);
_mesa_LoadIdentity();
_mesa_Ortho(0.0, ctx->DrawBuffer->Width,
0.0, ctx->DrawBuffer->Height,
-1.0, 1.0);
}
if (state & MESA_META_CLIP) {
save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled;
if (ctx->Transform.ClipPlanesEnabled) {
GLuint i;
for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
_mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
}
}
}
if (state & MESA_META_VERTEX) {
/* save vertex array object state */
_mesa_reference_array_object(ctx, &save->ArrayObj,
ctx->Array.ArrayObj);
_mesa_reference_buffer_object(ctx, &save->ArrayBufferObj,
ctx->Array.ArrayBufferObj);
/* set some default state? */
}
if (state & MESA_META_VIEWPORT) {
/* save viewport state */
save->ViewportX = ctx->Viewport.X;
save->ViewportY = ctx->Viewport.Y;
save->ViewportW = ctx->Viewport.Width;
save->ViewportH = ctx->Viewport.Height;
/* set viewport to match window size */
if (ctx->Viewport.X != 0 ||
ctx->Viewport.Y != 0 ||
ctx->Viewport.Width != ctx->DrawBuffer->Width ||
ctx->Viewport.Height != ctx->DrawBuffer->Height) {
_mesa_set_viewport(ctx, 0, 0,
ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
}
/* save depth range state */
save->DepthNear = ctx->Viewport.Near;
save->DepthFar = ctx->Viewport.Far;
/* set depth range to default */
_mesa_DepthRange(0.0, 1.0);
}
if (state & MESA_META_CLAMP_FRAGMENT_COLOR) {
save->ClampFragmentColor = ctx->Color.ClampFragmentColor;
/* Generally in here we want to do clamping according to whether
* it's for the pixel path (ClampFragmentColor is GL_TRUE),
* regardless of the internal implementation of the metaops.
*/
if (ctx->Color.ClampFragmentColor != GL_TRUE)
_mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
}
if (state & MESA_META_CLAMP_VERTEX_COLOR) {
save->ClampVertexColor = ctx->Light.ClampVertexColor;
/* Generally in here we never want vertex color clamping --
* result clamping is only dependent on fragment clamping.
*/
_mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, GL_FALSE);
}
if (state & MESA_META_CONDITIONAL_RENDER) {
save->CondRenderQuery = ctx->Query.CondRenderQuery;
save->CondRenderMode = ctx->Query.CondRenderMode;
if (ctx->Query.CondRenderQuery)
_mesa_EndConditionalRender();
}
#if FEATURE_feedback
if (state & MESA_META_SELECT_FEEDBACK) {
save->RenderMode = ctx->RenderMode;
if (ctx->RenderMode == GL_SELECT) {
save->Select = ctx->Select; /* struct copy */
_mesa_RenderMode(GL_RENDER);
} else if (ctx->RenderMode == GL_FEEDBACK) {
save->Feedback = ctx->Feedback; /* struct copy */
_mesa_RenderMode(GL_RENDER);
}
}
#endif
if (state & MESA_META_MULTISAMPLE) {
save->MultisampleEnabled = ctx->Multisample.Enabled;
if (ctx->Multisample.Enabled)
meta_set_enable(ctx, GL_MULTISAMPLE, GL_FALSE);
}
/* misc */
{
save->Lighting = ctx->Light.Enabled;
if (ctx->Light.Enabled)
_mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE);
save->RasterDiscard = ctx->RasterDiscard;
if (ctx->RasterDiscard)
_mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_FALSE);
}
}
/**
* Leave meta state. This is like a light-weight version of glPopAttrib().
*/
void
_mesa_meta_end(struct gl_context *ctx)
{
struct save_state *save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth - 1];
const GLbitfield state = save->SavedState;
if (state & MESA_META_ALPHA_TEST) {
if (ctx->Color.AlphaEnabled != save->AlphaEnabled)
_mesa_set_enable(ctx, GL_ALPHA_TEST, save->AlphaEnabled);
_mesa_AlphaFunc(save->AlphaFunc, save->AlphaRef);
}
if (state & MESA_META_BLEND) {
if (ctx->Color.BlendEnabled != save->BlendEnabled) {
if (ctx->Extensions.EXT_draw_buffers2) {
GLuint i;
for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
_mesa_set_enablei(ctx, GL_BLEND, i, (save->BlendEnabled >> i) & 1);
}
}
else {
_mesa_set_enable(ctx, GL_BLEND, (save->BlendEnabled & 1));
}
}
if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled)
_mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled);
}
if (state & MESA_META_COLOR_MASK) {
GLuint i;
for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
if (!TEST_EQ_4V(ctx->Color.ColorMask[i], save->ColorMask[i])) {
if (i == 0) {
_mesa_ColorMask(save->ColorMask[i][0], save->ColorMask[i][1],
save->ColorMask[i][2], save->ColorMask[i][3]);
}
else {
_mesa_ColorMaskIndexed(i,
save->ColorMask[i][0],
save->ColorMask[i][1],
save->ColorMask[i][2],
save->ColorMask[i][3]);
}
}
}
}
if (state & MESA_META_DEPTH_TEST) {
if (ctx->Depth.Test != save->Depth.Test)
_mesa_set_enable(ctx, GL_DEPTH_TEST, save->Depth.Test);
_mesa_DepthFunc(save->Depth.Func);
_mesa_DepthMask(save->Depth.Mask);
}
if ((state & MESA_META_FOG)
&& ctx->API != API_OPENGL_CORE
&& ctx->API != API_OPENGLES2) {
_mesa_set_enable(ctx, GL_FOG, save->Fog);
}
if (state & MESA_META_PIXEL_STORE) {
ctx->Pack = save->Pack;
ctx->Unpack = save->Unpack;
}
if (state & MESA_META_PIXEL_TRANSFER) {
ctx->Pixel.RedScale = save->RedScale;
ctx->Pixel.RedBias = save->RedBias;
ctx->Pixel.GreenScale = save->GreenScale;
ctx->Pixel.GreenBias = save->GreenBias;
ctx->Pixel.BlueScale = save->BlueScale;
ctx->Pixel.BlueBias = save->BlueBias;
ctx->Pixel.AlphaScale = save->AlphaScale;
ctx->Pixel.AlphaBias = save->AlphaBias;
ctx->Pixel.MapColorFlag = save->MapColorFlag;
/* XXX more state */
ctx->NewState |=_NEW_PIXEL;
}
if (state & MESA_META_RASTERIZATION) {
/* Core context requires that front and back mode be the same.
*/
if (ctx->API == API_OPENGL_CORE) {
_mesa_PolygonMode(GL_FRONT_AND_BACK, save->FrontPolygonMode);
} else {
_mesa_PolygonMode(GL_FRONT, save->FrontPolygonMode);
_mesa_PolygonMode(GL_BACK, save->BackPolygonMode);
}
if (ctx->API == API_OPENGL) {
_mesa_set_enable(ctx, GL_POLYGON_STIPPLE, save->PolygonStipple);
_mesa_set_enable(ctx, GL_POLYGON_SMOOTH, save->PolygonSmooth);
}
_mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, save->PolygonOffset);
_mesa_set_enable(ctx, GL_CULL_FACE, save->PolygonCull);
}
if (state & MESA_META_SCISSOR) {
_mesa_set_enable(ctx, GL_SCISSOR_TEST, save->Scissor.Enabled);
_mesa_Scissor(save->Scissor.X, save->Scissor.Y,
save->Scissor.Width, save->Scissor.Height);
}
if (state & MESA_META_SHADER) {
if (ctx->API == API_OPENGL && ctx->Extensions.ARB_vertex_program) {
_mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB,
save->VertexProgramEnabled);
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
save->VertexProgram);
_mesa_reference_vertprog(ctx, &save->VertexProgram, NULL);
}
if (ctx->API == API_OPENGL && ctx->Extensions.ARB_fragment_program) {
_mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB,
save->FragmentProgramEnabled);
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
save->FragmentProgram);
_mesa_reference_fragprog(ctx, &save->FragmentProgram, NULL);
}
if (ctx->API == API_OPENGL && ctx->Extensions.ATI_fragment_shader) {
_mesa_set_enable(ctx, GL_FRAGMENT_SHADER_ATI,
save->ATIFragmentShaderEnabled);
}
if (ctx->Extensions.ARB_vertex_shader)
_mesa_use_shader_program(ctx, GL_VERTEX_SHADER, save->VertexShader);
if (ctx->Extensions.ARB_geometry_shader4)
_mesa_use_shader_program(ctx, GL_GEOMETRY_SHADER_ARB,
save->GeometryShader);
if (ctx->Extensions.ARB_fragment_shader)
_mesa_use_shader_program(ctx, GL_FRAGMENT_SHADER,
save->FragmentShader);
_mesa_reference_shader_program(ctx, &ctx->Shader.ActiveProgram,
save->ActiveShader);
_mesa_reference_shader_program(ctx, &save->VertexShader, NULL);
_mesa_reference_shader_program(ctx, &save->GeometryShader, NULL);
_mesa_reference_shader_program(ctx, &save->FragmentShader, NULL);
_mesa_reference_shader_program(ctx, &save->ActiveShader, NULL);
}
if (state & MESA_META_STENCIL_TEST) {
const struct gl_stencil_attrib *stencil = &save->Stencil;
_mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
_mesa_ClearStencil(stencil->Clear);
if (ctx->API == API_OPENGL && ctx->Extensions.EXT_stencil_two_side) {
_mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
stencil->TestTwoSide);
_mesa_ActiveStencilFaceEXT(stencil->ActiveFace
? GL_BACK : GL_FRONT);
}
/* front state */
_mesa_StencilFuncSeparate(GL_FRONT,
stencil->Function[0],
stencil->Ref[0],
stencil->ValueMask[0]);
_mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
_mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
stencil->ZFailFunc[0],
stencil->ZPassFunc[0]);
/* back state */
_mesa_StencilFuncSeparate(GL_BACK,
stencil->Function[1],
stencil->Ref[1],
stencil->ValueMask[1]);
_mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
_mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
stencil->ZFailFunc[1],
stencil->ZPassFunc[1]);
}
if (state & MESA_META_TEXTURE) {
GLuint u, tgt;
ASSERT(ctx->Texture.CurrentUnit == 0);
/* restore texenv for unit[0] */
if (ctx->API == API_OPENGL || ctx->API == API_OPENGLES) {
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, save->EnvMode);
}
/* restore texture objects for unit[0] only */
for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
if (ctx->Texture.Unit[0].CurrentTex[tgt] != save->CurrentTexture[tgt]) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
_mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt],
save->CurrentTexture[tgt]);
}
_mesa_reference_texobj(&save->CurrentTexture[tgt], NULL);
}
/* Restore fixed function texture enables, texgen */
if (ctx->API == API_OPENGL || ctx->API == API_OPENGLES) {
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
if (ctx->Texture.Unit[u].Enabled != save->TexEnabled[u]) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
ctx->Texture.Unit[u].Enabled = save->TexEnabled[u];
}
if (ctx->Texture.Unit[u].TexGenEnabled != save->TexGenEnabled[u]) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
ctx->Texture.Unit[u].TexGenEnabled = save->TexGenEnabled[u];
}
}
}
/* restore current unit state */
_mesa_ActiveTextureARB(GL_TEXTURE0 + save->ActiveUnit);
_mesa_ClientActiveTextureARB(GL_TEXTURE0 + save->ClientActiveUnit);
}
if (state & MESA_META_TRANSFORM) {
GLuint activeTexture = ctx->Texture.CurrentUnit;
_mesa_ActiveTextureARB(GL_TEXTURE0);
_mesa_MatrixMode(GL_TEXTURE);
_mesa_LoadMatrixf(save->TextureMatrix);
_mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture);
_mesa_MatrixMode(GL_MODELVIEW);
_mesa_LoadMatrixf(save->ModelviewMatrix);
_mesa_MatrixMode(GL_PROJECTION);
_mesa_LoadMatrixf(save->ProjectionMatrix);
_mesa_MatrixMode(save->MatrixMode);
}
if (state & MESA_META_CLIP) {
if (save->ClipPlanesEnabled) {
GLuint i;
for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
if (save->ClipPlanesEnabled & (1 << i)) {
_mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
}
}
}
}
if (state & MESA_META_VERTEX) {
/* restore vertex buffer object */
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, save->ArrayBufferObj->Name);
_mesa_reference_buffer_object(ctx, &save->ArrayBufferObj, NULL);
/* restore vertex array object */
_mesa_BindVertexArray(save->ArrayObj->Name);
_mesa_reference_array_object(ctx, &save->ArrayObj, NULL);
}
if (state & MESA_META_VIEWPORT) {
if (save->ViewportX != ctx->Viewport.X ||
save->ViewportY != ctx->Viewport.Y ||
save->ViewportW != ctx->Viewport.Width ||
save->ViewportH != ctx->Viewport.Height) {
_mesa_set_viewport(ctx, save->ViewportX, save->ViewportY,
save->ViewportW, save->ViewportH);
}
_mesa_DepthRange(save->DepthNear, save->DepthFar);
}
if (state & MESA_META_CLAMP_FRAGMENT_COLOR) {
_mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, save->ClampFragmentColor);
}
if (state & MESA_META_CLAMP_VERTEX_COLOR) {
_mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR, save->ClampVertexColor);
}
if (state & MESA_META_CONDITIONAL_RENDER) {
if (save->CondRenderQuery)
_mesa_BeginConditionalRender(save->CondRenderQuery->Id,
save->CondRenderMode);
}
#if FEATURE_feedback
if (state & MESA_META_SELECT_FEEDBACK) {
if (save->RenderMode == GL_SELECT) {
_mesa_RenderMode(GL_SELECT);
ctx->Select = save->Select;
} else if (save->RenderMode == GL_FEEDBACK) {
_mesa_RenderMode(GL_FEEDBACK);
ctx->Feedback = save->Feedback;
}
}
#endif
if (state & MESA_META_MULTISAMPLE) {
if (ctx->Multisample.Enabled != save->MultisampleEnabled)
meta_set_enable(ctx, GL_MULTISAMPLE, save->MultisampleEnabled);
}
/* misc */
if (save->Lighting) {
_mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE);
}
if (save->RasterDiscard) {
_mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_TRUE);
}
#if FEATURE_EXT_transform_feedback
if (save->TransformFeedbackNeedsResume)
_mesa_ResumeTransformFeedback();
#endif
ctx->Meta->SaveStackDepth--;
}
/**
* Determine whether Mesa is currently in a meta state.
*/
GLboolean
_mesa_meta_in_progress(struct gl_context *ctx)
{
return ctx->Meta->SaveStackDepth != 0;
}
/**
* Convert Z from a normalized value in the range [0, 1] to an object-space
* Z coordinate in [-1, +1] so that drawing at the new Z position with the
* default/identity ortho projection results in the original Z value.
* Used by the meta-Clear, Draw/CopyPixels and Bitmap functions where the Z
* value comes from the clear value or raster position.
*/
static INLINE GLfloat
invert_z(GLfloat normZ)
{
GLfloat objZ = 1.0f - 2.0f * normZ;
return objZ;
}
/**
* One-time init for a temp_texture object.
* Choose tex target, compute max tex size, etc.
*/
static void
init_temp_texture(struct gl_context *ctx, struct temp_texture *tex)
{
/* prefer texture rectangle */
if (ctx->Extensions.NV_texture_rectangle) {
tex->Target = GL_TEXTURE_RECTANGLE;
tex->MaxSize = ctx->Const.MaxTextureRectSize;
tex->NPOT = GL_TRUE;
}
else {
/* use 2D texture, NPOT if possible */
tex->Target = GL_TEXTURE_2D;
tex->MaxSize = 1 << (ctx->Const.MaxTextureLevels - 1);
tex->NPOT = ctx->Extensions.ARB_texture_non_power_of_two;
}
tex->MinSize = 16; /* 16 x 16 at least */
assert(tex->MaxSize > 0);
_mesa_GenTextures(1, &tex->TexObj);
}
static void
cleanup_temp_texture(struct gl_context *ctx, struct temp_texture *tex)
{
if (!tex->TexObj)
return;
_mesa_DeleteTextures(1, &tex->TexObj);
tex->TexObj = 0;
}
/**
* Return pointer to temp_texture info for non-bitmap ops.
* This does some one-time init if needed.
*/
static struct temp_texture *
get_temp_texture(struct gl_context *ctx)
{
struct temp_texture *tex = &ctx->Meta->TempTex;
if (!tex->TexObj) {
init_temp_texture(ctx, tex);
}
return tex;
}
/**
* Return pointer to temp_texture info for _mesa_meta_bitmap().
* We use a separate texture for bitmaps to reduce texture
* allocation/deallocation.
*/
static struct temp_texture *
get_bitmap_temp_texture(struct gl_context *ctx)
{
struct temp_texture *tex = &ctx->Meta->Bitmap.Tex;
if (!tex->TexObj) {
init_temp_texture(ctx, tex);
}
return tex;
}
/**
* Compute the width/height of texture needed to draw an image of the
* given size. Return a flag indicating whether the current texture
* can be re-used (glTexSubImage2D) or if a new texture needs to be
* allocated (glTexImage2D).
* Also, compute s/t texcoords for drawing.
*
* \return GL_TRUE if new texture is needed, GL_FALSE otherwise
*/
static GLboolean
alloc_texture(struct temp_texture *tex,
GLsizei width, GLsizei height, GLenum intFormat)
{
GLboolean newTex = GL_FALSE;
ASSERT(width <= tex->MaxSize);
ASSERT(height <= tex->MaxSize);
if (width > tex->Width ||
height > tex->Height ||
intFormat != tex->IntFormat) {
/* alloc new texture (larger or different format) */
if (tex->NPOT) {
/* use non-power of two size */
tex->Width = MAX2(tex->MinSize, width);
tex->Height = MAX2(tex->MinSize, height);
}
else {
/* find power of two size */
GLsizei w, h;
w = h = tex->MinSize;
while (w < width)
w *= 2;
while (h < height)
h *= 2;
tex->Width = w;
tex->Height = h;
}
tex->IntFormat = intFormat;
newTex = GL_TRUE;
}
/* compute texcoords */
if (tex->Target == GL_TEXTURE_RECTANGLE) {
tex->Sright = (GLfloat) width;
tex->Ttop = (GLfloat) height;
}
else {
tex->Sright = (GLfloat) width / tex->Width;
tex->Ttop = (GLfloat) height / tex->Height;
}
return newTex;
}
/**
* Setup/load texture for glCopyPixels or glBlitFramebuffer.
*/
static void
setup_copypix_texture(struct temp_texture *tex,
GLboolean newTex,
GLint srcX, GLint srcY,
GLsizei width, GLsizei height, GLenum intFormat,
GLenum filter)
{
_mesa_BindTexture(tex->Target, tex->TexObj);
_mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, filter);
_mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, filter);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
/* copy framebuffer image to texture */
if (newTex) {
/* create new tex image */
if (tex->Width == width && tex->Height == height) {
/* create new tex with framebuffer data */
_mesa_CopyTexImage2D(tex->Target, 0, tex->IntFormat,
srcX, srcY, width, height, 0);
}
else {
/* create empty texture */
_mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
tex->Width, tex->Height, 0,
intFormat, GL_UNSIGNED_BYTE, NULL);
/* load image */
_mesa_CopyTexSubImage2D(tex->Target, 0,
0, 0, srcX, srcY, width, height);
}
}
else {
/* replace existing tex image */
_mesa_CopyTexSubImage2D(tex->Target, 0,
0, 0, srcX, srcY, width, height);
}
}
/**
* Setup/load texture for glDrawPixels.
*/
static void
setup_drawpix_texture(struct gl_context *ctx,
struct temp_texture *tex,
GLboolean newTex,
GLenum texIntFormat,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
const GLvoid *pixels)
{
_mesa_BindTexture(tex->Target, tex->TexObj);
_mesa_TexParameteri(tex->Target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
_mesa_TexParameteri(tex->Target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
/* copy pixel data to texture */
if (newTex) {
/* create new tex image */
if (tex->Width == width && tex->Height == height) {
/* create new tex and load image data */
_mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
tex->Width, tex->Height, 0, format, type, pixels);
}
else {
struct gl_buffer_object *save_unpack_obj = NULL;
_mesa_reference_buffer_object(ctx, &save_unpack_obj,
ctx->Unpack.BufferObj);
_mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
/* create empty texture */
_mesa_TexImage2D(tex->Target, 0, tex->IntFormat,
tex->Width, tex->Height, 0, format, type, NULL);
if (save_unpack_obj != NULL)
_mesa_BindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB,
save_unpack_obj->Name);
/* load image */
_mesa_TexSubImage2D(tex->Target, 0,
0, 0, width, height, format, type, pixels);
}
}
else {
/* replace existing tex image */
_mesa_TexSubImage2D(tex->Target, 0,
0, 0, width, height, format, type, pixels);
}
}
/**
* One-time init for drawing depth pixels.
*/
static void
init_blit_depth_pixels(struct gl_context *ctx)
{
static const char *program =
"!!ARBfp1.0\n"
"TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
"END \n";
char program2[200];
struct blit_state *blit = &ctx->Meta->Blit;
struct temp_texture *tex = get_temp_texture(ctx);
const char *texTarget;
assert(blit->DepthFP == 0);
/* replace %s with "RECT" or "2D" */
assert(strlen(program) + 4 < sizeof(program2));
if (tex->Target == GL_TEXTURE_RECTANGLE)
texTarget = "RECT";
else
texTarget = "2D";
_mesa_snprintf(program2, sizeof(program2), program, texTarget);
_mesa_GenPrograms(1, &blit->DepthFP);
_mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
_mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
strlen(program2), (const GLubyte *) program2);
}
/**
* Try to do a glBlitFramebuffer using no-copy texturing.
* We can do this when the src renderbuffer is actually a texture.
* But if the src buffer == dst buffer we cannot do this.
*
* \return new buffer mask indicating the buffers left to blit using the
* normal path.
*/
static GLbitfield
blitframebuffer_texture(struct gl_context *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
if (mask & GL_COLOR_BUFFER_BIT) {
const struct gl_framebuffer *drawFb = ctx->DrawBuffer;
const struct gl_framebuffer *readFb = ctx->ReadBuffer;
const struct gl_renderbuffer_attachment *drawAtt =
&drawFb->Attachment[drawFb->_ColorDrawBufferIndexes[0]];
const struct gl_renderbuffer_attachment *readAtt =
&readFb->Attachment[readFb->_ColorReadBufferIndex];
if (readAtt && readAtt->Texture) {
const struct gl_texture_object *texObj = readAtt->Texture;
const GLuint srcLevel = readAtt->TextureLevel;
const GLint baseLevelSave = texObj->BaseLevel;
const GLint maxLevelSave = texObj->MaxLevel;
const GLenum fbo_srgb_save = ctx->Color.sRGBEnabled;
const GLenum target = texObj->Target;
GLuint sampler, samplerSave =
ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
if (drawAtt->Texture == readAtt->Texture) {
/* Can't use same texture as both the source and dest. We need
* to handle overlapping blits and besides, some hw may not
* support this.
*/
return mask;
}
if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_ARB) {
/* Can't handle other texture types at this time */
return mask;
}
_mesa_GenSamplers(1, &sampler);
_mesa_BindSampler(ctx->Texture.CurrentUnit, sampler);
/*
printf("Blit from texture!\n");
printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt);
printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture);
*/
/* Prepare src texture state */
_mesa_BindTexture(target, texObj->Name);
_mesa_SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, filter);
_mesa_SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, filter);
if (target != GL_TEXTURE_RECTANGLE_ARB) {
_mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
}
_mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
_mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
/* Always do our blits with no sRGB decode or encode.*/
if (ctx->Extensions.EXT_texture_sRGB_decode) {
_mesa_SamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
GL_SKIP_DECODE_EXT);
}
if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_framebuffer_sRGB)
|| _mesa_is_gles3(ctx)) {
_mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_FALSE);
}
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
_mesa_set_enable(ctx, target, GL_TRUE);
/* Prepare vertex data (the VBO was previously created and bound) */
{
struct vertex {
GLfloat x, y, s, t;
};
struct vertex verts[4];
GLfloat s0, t0, s1, t1;
if (target == GL_TEXTURE_2D) {
const struct gl_texture_image *texImage
= _mesa_select_tex_image(ctx, texObj, target, srcLevel);
s0 = srcX0 / (float) texImage->Width;
s1 = srcX1 / (float) texImage->Width;
t0 = srcY0 / (float) texImage->Height;
t1 = srcY1 / (float) texImage->Height;
}
else {
assert(target == GL_TEXTURE_RECTANGLE_ARB);
s0 = srcX0;
s1 = srcX1;
t0 = srcY0;
t1 = srcY1;
}
verts[0].x = (GLfloat) dstX0;
verts[0].y = (GLfloat) dstY0;
verts[1].x = (GLfloat) dstX1;
verts[1].y = (GLfloat) dstY0;
verts[2].x = (GLfloat) dstX1;
verts[2].y = (GLfloat) dstY1;
verts[3].x = (GLfloat) dstX0;
verts[3].y = (GLfloat) dstY1;
verts[0].s = s0;
verts[0].t = t0;
verts[1].s = s1;
verts[1].t = t0;
verts[2].s = s1;
verts[2].t = t1;
verts[3].s = s0;
verts[3].t = t1;
_mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
}
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
/* Restore texture object state, the texture binding will
* be restored by _mesa_meta_end().
*/
if (target != GL_TEXTURE_RECTANGLE_ARB) {
_mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
}
if (ctx->Extensions.EXT_framebuffer_sRGB && fbo_srgb_save) {
_mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_TRUE);
}
_mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
_mesa_DeleteSamplers(1, &sampler);
/* Done with color buffer */
mask &= ~GL_COLOR_BUFFER_BIT;
}
}
return mask;
}
/**
* Meta implementation of ctx->Driver.BlitFramebuffer() in terms
* of texture mapping and polygon rendering.
*/
void
_mesa_meta_BlitFramebuffer(struct gl_context *ctx,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
struct blit_state *blit = &ctx->Meta->Blit;
struct temp_texture *tex = get_temp_texture(ctx);
const GLsizei maxTexSize = tex->MaxSize;
const GLint srcX = MIN2(srcX0, srcX1);
const GLint srcY = MIN2(srcY0, srcY1);
const GLint srcW = abs(srcX1 - srcX0);
const GLint srcH = abs(srcY1 - srcY0);
const GLboolean srcFlipX = srcX1 < srcX0;
const GLboolean srcFlipY = srcY1 < srcY0;
struct vertex {
GLfloat x, y, s, t;
};
struct vertex verts[4];
GLboolean newTex;
/* In addition to falling back if the blit size is larger than the maximum
* texture size, fallback if the source is multisampled. This fallback can
* be removed once Mesa gets support ARB_texture_multisample.
*/
if (srcW > maxTexSize || srcH > maxTexSize
|| ctx->ReadBuffer->Visual.samples > 0) {
/* XXX avoid this fallback */
_swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, mask, filter);
return;
}
if (srcFlipX) {
GLint tmp = dstX0;
dstX0 = dstX1;
dstX1 = tmp;
}
if (srcFlipY) {
GLint tmp = dstY0;
dstY0 = dstY1;
dstY1 = tmp;
}
/* only scissor effects blit so save/clear all other relevant state */
_mesa_meta_begin(ctx, ~MESA_META_SCISSOR);
if (blit->ArrayObj == 0) {
/* one-time setup */
/* create vertex array object */
_mesa_GenVertexArrays(1, &blit->ArrayObj);
_mesa_BindVertexArray(blit->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &blit->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
NULL, GL_DYNAMIC_DRAW_ARB);
/* setup vertex arrays */
_mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
_mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
}
else {
_mesa_BindVertexArray(blit->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO);
}
/* Try faster, direct texture approach first */
mask = blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, mask, filter);
if (mask == 0x0) {
_mesa_meta_end(ctx);
return;
}
/* Continue with "normal" approach which involves copying the src rect
* into a temporary texture and is "blitted" by drawing a textured quad.
*/
newTex = alloc_texture(tex, srcW, srcH, GL_RGBA);
/* vertex positions/texcoords (after texture allocation!) */
{
verts[0].x = (GLfloat) dstX0;
verts[0].y = (GLfloat) dstY0;
verts[1].x = (GLfloat) dstX1;
verts[1].y = (GLfloat) dstY0;
verts[2].x = (GLfloat) dstX1;
verts[2].y = (GLfloat) dstY1;
verts[3].x = (GLfloat) dstX0;
verts[3].y = (GLfloat) dstY1;
verts[0].s = 0.0F;
verts[0].t = 0.0F;
verts[1].s = tex->Sright;
verts[1].t = 0.0F;
verts[2].s = tex->Sright;
verts[2].t = tex->Ttop;
verts[3].s = 0.0F;
verts[3].t = tex->Ttop;
/* upload new vertex data */
_mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
}
_mesa_set_enable(ctx, tex->Target, GL_TRUE);
if (mask & GL_COLOR_BUFFER_BIT) {
setup_copypix_texture(tex, newTex, srcX, srcY, srcW, srcH,
GL_RGBA, filter);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
mask &= ~GL_COLOR_BUFFER_BIT;
}
if (mask & GL_DEPTH_BUFFER_BIT) {
GLuint *tmp = (GLuint *) malloc(srcW * srcH * sizeof(GLuint));
if (tmp) {
if (!blit->DepthFP)
init_blit_depth_pixels(ctx);
/* maybe change tex format here */
newTex = alloc_texture(tex, srcW, srcH, GL_DEPTH_COMPONENT);
_mesa_ReadPixels(srcX, srcY, srcW, srcH,
GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
setup_drawpix_texture(ctx, tex, newTex, GL_DEPTH_COMPONENT, srcW, srcH,
GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, tmp);
_mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
_mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
_mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
_mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
_mesa_DepthFunc(GL_ALWAYS);
_mesa_DepthMask(GL_TRUE);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
mask &= ~GL_DEPTH_BUFFER_BIT;
free(tmp);
}
}
if (mask & GL_STENCIL_BUFFER_BIT) {
/* XXX can't easily do stencil */
}
_mesa_set_enable(ctx, tex->Target, GL_FALSE);
_mesa_meta_end(ctx);
if (mask) {
_swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1, mask, filter);
}
}
static void
meta_glsl_blit_cleanup(struct gl_context *ctx, struct blit_state *blit)
{
if (blit->ArrayObj) {
_mesa_DeleteVertexArraysAPPLE(1, &blit->ArrayObj);
blit->ArrayObj = 0;
_mesa_DeleteBuffersARB(1, &blit->VBO);
blit->VBO = 0;
}
if (blit->DepthFP) {
_mesa_DeletePrograms(1, &blit->DepthFP);
blit->DepthFP = 0;
}
}
/**
* Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.
*/
void
_mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)
{
struct clear_state *clear = &ctx->Meta->Clear;
struct vertex {
GLfloat x, y, z, r, g, b, a;
};
struct vertex verts[4];
/* save all state but scissor, pixel pack/unpack */
GLbitfield metaSave = (MESA_META_ALL -
MESA_META_SCISSOR -
MESA_META_PIXEL_STORE -
MESA_META_CONDITIONAL_RENDER);
const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
if (buffers & BUFFER_BITS_COLOR) {
/* if clearing color buffers, don't save/restore colormask */
metaSave -= MESA_META_COLOR_MASK;
}
_mesa_meta_begin(ctx, metaSave);
if (clear->ArrayObj == 0) {
/* one-time setup */
/* create vertex array object */
_mesa_GenVertexArrays(1, &clear->ArrayObj);
_mesa_BindVertexArray(clear->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &clear->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
/* setup vertex arrays */
_mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
_mesa_EnableClientState(GL_COLOR_ARRAY);
}
else {
_mesa_BindVertexArray(clear->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
}
/* GL_COLOR_BUFFER_BIT */
if (buffers & BUFFER_BITS_COLOR) {
/* leave colormask, glDrawBuffer state as-is */
/* Clears never have the color clamped. */
_mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
}
else {
ASSERT(metaSave & MESA_META_COLOR_MASK);
_mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
}
/* GL_DEPTH_BUFFER_BIT */
if (buffers & BUFFER_BIT_DEPTH) {
_mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
_mesa_DepthFunc(GL_ALWAYS);
_mesa_DepthMask(GL_TRUE);
}
else {
assert(!ctx->Depth.Test);
}
/* GL_STENCIL_BUFFER_BIT */
if (buffers & BUFFER_BIT_STENCIL) {
_mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
_mesa_StencilOpSeparate(GL_FRONT_AND_BACK,
GL_REPLACE, GL_REPLACE, GL_REPLACE);
_mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,
ctx->Stencil.Clear & stencilMax,
ctx->Stencil.WriteMask[0]);
}
else {
assert(!ctx->Stencil.Enabled);
}
/* vertex positions/colors */
{
const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin;
const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin;
const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax;
const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax;
const GLfloat z = invert_z(ctx->Depth.Clear);
GLuint i;
verts[0].x = x0;
verts[0].y = y0;
verts[0].z = z;
verts[1].x = x1;
verts[1].y = y0;
verts[1].z = z;
verts[2].x = x1;
verts[2].y = y1;
verts[2].z = z;
verts[3].x = x0;
verts[3].y = y1;
verts[3].z = z;
/* vertex colors */
for (i = 0; i < 4; i++) {
verts[i].r = ctx->Color.ClearColor.f[0];
verts[i].g = ctx->Color.ClearColor.f[1];
verts[i].b = ctx->Color.ClearColor.f[2];
verts[i].a = ctx->Color.ClearColor.f[3];
}
/* upload new vertex data */
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts,
GL_DYNAMIC_DRAW_ARB);
}
/* draw quad */
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
_mesa_meta_end(ctx);
}
static void
meta_glsl_clear_init(struct gl_context *ctx, struct clear_state *clear)
{
const char *vs_source =
"attribute vec4 position;\n"
"void main()\n"
"{\n"
" gl_Position = position;\n"
"}\n";
const char *fs_source =
"uniform vec4 color;\n"
"void main()\n"
"{\n"
" gl_FragColor = color;\n"
"}\n";
const char *vs_int_source =
"#version 130\n"
"in vec4 position;\n"
"void main()\n"
"{\n"
" gl_Position = position;\n"
"}\n";
const char *fs_int_source =
"#version 130\n"
"uniform ivec4 color;\n"
"out ivec4 out_color;\n"
"\n"
"void main()\n"
"{\n"
" out_color = color;\n"
"}\n";
GLuint vs, fs;
if (clear->ArrayObj != 0)
return;
/* create vertex array object */
_mesa_GenVertexArrays(1, &clear->ArrayObj);
_mesa_BindVertexArray(clear->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &clear->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
/* setup vertex arrays */
_mesa_VertexAttribPointerARB(0, 3, GL_FLOAT, GL_FALSE, 0, (void *)0);
_mesa_EnableVertexAttribArrayARB(0);
vs = _mesa_CreateShaderObjectARB(GL_VERTEX_SHADER);
_mesa_ShaderSourceARB(vs, 1, &vs_source, NULL);
_mesa_CompileShaderARB(vs);
fs = _mesa_CreateShaderObjectARB(GL_FRAGMENT_SHADER);
_mesa_ShaderSourceARB(fs, 1, &fs_source, NULL);
_mesa_CompileShaderARB(fs);
clear->ShaderProg = _mesa_CreateProgramObjectARB();
_mesa_AttachShader(clear->ShaderProg, fs);
_mesa_DeleteObjectARB(fs);
_mesa_AttachShader(clear->ShaderProg, vs);
_mesa_DeleteObjectARB(vs);
_mesa_BindAttribLocationARB(clear->ShaderProg, 0, "position");
_mesa_LinkProgramARB(clear->ShaderProg);
clear->ColorLocation = _mesa_GetUniformLocationARB(clear->ShaderProg,
"color");
if (_mesa_is_desktop_gl(ctx) && ctx->Const.GLSLVersion >= 130) {
vs = compile_shader_with_debug(ctx, GL_VERTEX_SHADER, vs_int_source);
fs = compile_shader_with_debug(ctx, GL_FRAGMENT_SHADER, fs_int_source);
clear->IntegerShaderProg = _mesa_CreateProgramObjectARB();
_mesa_AttachShader(clear->IntegerShaderProg, fs);
_mesa_DeleteObjectARB(fs);
_mesa_AttachShader(clear->IntegerShaderProg, vs);
_mesa_DeleteObjectARB(vs);
_mesa_BindAttribLocationARB(clear->IntegerShaderProg, 0, "position");
/* Note that user-defined out attributes get automatically assigned
* locations starting from 0, so we don't need to explicitly
* BindFragDataLocation to 0.
*/
link_program_with_debug(ctx, clear->IntegerShaderProg);
clear->IntegerColorLocation =
_mesa_GetUniformLocationARB(clear->IntegerShaderProg, "color");
}
}
static void
meta_glsl_clear_cleanup(struct gl_context *ctx, struct clear_state *clear)
{
if (clear->ArrayObj == 0)
return;
_mesa_DeleteVertexArraysAPPLE(1, &clear->ArrayObj);
clear->ArrayObj = 0;
_mesa_DeleteBuffersARB(1, &clear->VBO);
clear->VBO = 0;
_mesa_DeleteObjectARB(clear->ShaderProg);
clear->ShaderProg = 0;
if (clear->IntegerShaderProg) {
_mesa_DeleteObjectARB(clear->IntegerShaderProg);
clear->IntegerShaderProg = 0;
}
}
/**
* Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.
*/
void
_mesa_meta_glsl_Clear(struct gl_context *ctx, GLbitfield buffers)
{
struct clear_state *clear = &ctx->Meta->Clear;
GLbitfield metaSave;
const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
struct gl_framebuffer *fb = ctx->DrawBuffer;
const float x0 = ((float)fb->_Xmin / fb->Width) * 2.0f - 1.0f;
const float y0 = ((float)fb->_Ymin / fb->Height) * 2.0f - 1.0f;
const float x1 = ((float)fb->_Xmax / fb->Width) * 2.0f - 1.0f;
const float y1 = ((float)fb->_Ymax / fb->Height) * 2.0f - 1.0f;
const float z = -invert_z(ctx->Depth.Clear);
struct vertex {
GLfloat x, y, z;
} verts[4];
metaSave = (MESA_META_ALPHA_TEST |
MESA_META_BLEND |
MESA_META_DEPTH_TEST |
MESA_META_RASTERIZATION |
MESA_META_SHADER |
MESA_META_STENCIL_TEST |
MESA_META_VERTEX |
MESA_META_VIEWPORT |
MESA_META_CLIP |
MESA_META_CLAMP_FRAGMENT_COLOR |
MESA_META_MULTISAMPLE);
if (!(buffers & BUFFER_BITS_COLOR)) {
/* We'll use colormask to disable color writes. Otherwise,
* respect color mask
*/
metaSave |= MESA_META_COLOR_MASK;
}
_mesa_meta_begin(ctx, metaSave);
meta_glsl_clear_init(ctx, clear);
if (fb->_IntegerColor) {
_mesa_UseProgramObjectARB(clear->IntegerShaderProg);
_mesa_Uniform4ivARB(clear->IntegerColorLocation, 1,
ctx->Color.ClearColor.i);
} else {
_mesa_UseProgramObjectARB(clear->ShaderProg);
_mesa_Uniform4fvARB(clear->ColorLocation, 1,
ctx->Color.ClearColor.f);
}
_mesa_BindVertexArray(clear->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
/* GL_COLOR_BUFFER_BIT */
if (buffers & BUFFER_BITS_COLOR) {
/* leave colormask, glDrawBuffer state as-is */
/* Clears never have the color clamped. */
_mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
}
else {
ASSERT(metaSave & MESA_META_COLOR_MASK);
_mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
}
/* GL_DEPTH_BUFFER_BIT */
if (buffers & BUFFER_BIT_DEPTH) {
_mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
_mesa_DepthFunc(GL_ALWAYS);
_mesa_DepthMask(GL_TRUE);
}
else {
assert(!ctx->Depth.Test);
}
/* GL_STENCIL_BUFFER_BIT */
if (buffers & BUFFER_BIT_STENCIL) {
_mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
_mesa_StencilOpSeparate(GL_FRONT_AND_BACK,
GL_REPLACE, GL_REPLACE, GL_REPLACE);
_mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,
ctx->Stencil.Clear & stencilMax,
ctx->Stencil.WriteMask[0]);
}
else {
assert(!ctx->Stencil.Enabled);
}
/* vertex positions */
verts[0].x = x0;
verts[0].y = y0;
verts[0].z = z;
verts[1].x = x1;
verts[1].y = y0;
verts[1].z = z;
verts[2].x = x1;
verts[2].y = y1;
verts[2].z = z;
verts[3].x = x0;
verts[3].y = y1;
verts[3].z = z;
/* upload new vertex data */
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts), verts,
GL_DYNAMIC_DRAW_ARB);
/* draw quad */
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
_mesa_meta_end(ctx);
}
/**
* Meta implementation of ctx->Driver.CopyPixels() in terms
* of texture mapping and polygon rendering and GLSL shaders.
*/
void
_mesa_meta_CopyPixels(struct gl_context *ctx, GLint srcX, GLint srcY,
GLsizei width, GLsizei height,
GLint dstX, GLint dstY, GLenum type)
{
struct copypix_state *copypix = &ctx->Meta->CopyPix;
struct temp_texture *tex = get_temp_texture(ctx);
struct vertex {
GLfloat x, y, z, s, t;
};
struct vertex verts[4];
GLboolean newTex;
GLenum intFormat = GL_RGBA;
if (type != GL_COLOR ||
ctx->_ImageTransferState ||
ctx->Fog.Enabled ||
width > tex->MaxSize ||
height > tex->MaxSize) {
/* XXX avoid this fallback */
_swrast_CopyPixels(ctx, srcX, srcY, width, height, dstX, dstY, type);
return;
}
/* Most GL state applies to glCopyPixels, but a there's a few things
* we need to override:
*/
_mesa_meta_begin(ctx, (MESA_META_RASTERIZATION |
MESA_META_SHADER |
MESA_META_TEXTURE |
MESA_META_TRANSFORM |
MESA_META_CLIP |
MESA_META_VERTEX |
MESA_META_VIEWPORT));
if (copypix->ArrayObj == 0) {
/* one-time setup */
/* create vertex array object */
_mesa_GenVertexArrays(1, ©pix->ArrayObj);
_mesa_BindVertexArray(copypix->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, ©pix->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
NULL, GL_DYNAMIC_DRAW_ARB);
/* setup vertex arrays */
_mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
_mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
}
else {
_mesa_BindVertexArray(copypix->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO);
}
newTex = alloc_texture(tex, width, height, intFormat);
/* vertex positions, texcoords (after texture allocation!) */
{
const GLfloat dstX0 = (GLfloat) dstX;
const GLfloat dstY0 = (GLfloat) dstY;
const GLfloat dstX1 = dstX + width * ctx->Pixel.ZoomX;
const GLfloat dstY1 = dstY + height * ctx->Pixel.ZoomY;
const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
verts[0].x = dstX0;
verts[0].y = dstY0;
verts[0].z = z;
verts[0].s = 0.0F;
verts[0].t = 0.0F;
verts[1].x = dstX1;
verts[1].y = dstY0;
verts[1].z = z;
verts[1].s = tex->Sright;
verts[1].t = 0.0F;
verts[2].x = dstX1;
verts[2].y = dstY1;
verts[2].z = z;
verts[2].s = tex->Sright;
verts[2].t = tex->Ttop;
verts[3].x = dstX0;
verts[3].y = dstY1;
verts[3].z = z;
verts[3].s = 0.0F;
verts[3].t = tex->Ttop;
/* upload new vertex data */
_mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
}
/* Alloc/setup texture */
setup_copypix_texture(tex, newTex, srcX, srcY, width, height,
GL_RGBA, GL_NEAREST);
_mesa_set_enable(ctx, tex->Target, GL_TRUE);
/* draw textured quad */
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
_mesa_set_enable(ctx, tex->Target, GL_FALSE);
_mesa_meta_end(ctx);
}
/**
* When the glDrawPixels() image size is greater than the max rectangle
* texture size we use this function to break the glDrawPixels() image
* into tiles which fit into the max texture size.
*/
static void
tiled_draw_pixels(struct gl_context *ctx,
GLint tileSize,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
struct gl_pixelstore_attrib tileUnpack = *unpack;
GLint i, j;
if (tileUnpack.RowLength == 0)
tileUnpack.RowLength = width;
for (i = 0; i < width; i += tileSize) {
const GLint tileWidth = MIN2(tileSize, width - i);
const GLint tileX = (GLint) (x + i * ctx->Pixel.ZoomX);
tileUnpack.SkipPixels = unpack->SkipPixels + i;
for (j = 0; j < height; j += tileSize) {
const GLint tileHeight = MIN2(tileSize, height - j);
const GLint tileY = (GLint) (y + j * ctx->Pixel.ZoomY);
tileUnpack.SkipRows = unpack->SkipRows + j;
_mesa_meta_DrawPixels(ctx, tileX, tileY, tileWidth, tileHeight,
format, type, &tileUnpack, pixels);
}
}
}
/**
* One-time init for drawing stencil pixels.
*/
static void
init_draw_stencil_pixels(struct gl_context *ctx)
{
/* This program is run eight times, once for each stencil bit.
* The stencil values to draw are found in an 8-bit alpha texture.
* We read the texture/stencil value and test if bit 'b' is set.
* If the bit is not set, use KIL to kill the fragment.
* Finally, we use the stencil test to update the stencil buffer.
*
* The basic algorithm for checking if a bit is set is:
* if (is_odd(value / (1 << bit)))
* result is one (or non-zero).
* else
* result is zero.
* The program parameter contains three values:
* parm.x = 255 / (1 << bit)
* parm.y = 0.5
* parm.z = 0.0
*/
static const char *program =
"!!ARBfp1.0\n"
"PARAM parm = program.local[0]; \n"
"TEMP t; \n"
"TEX t, fragment.texcoord[0], texture[0], %s; \n" /* NOTE %s here! */
"# t = t * 255 / bit \n"
"MUL t.x, t.a, parm.x; \n"
"# t = (int) t \n"
"FRC t.y, t.x; \n"
"SUB t.x, t.x, t.y; \n"
"# t = t * 0.5 \n"
"MUL t.x, t.x, parm.y; \n"
"# t = fract(t.x) \n"
"FRC t.x, t.x; # if t.x != 0, then the bit is set \n"
"# t.x = (t.x == 0 ? 1 : 0) \n"
"SGE t.x, -t.x, parm.z; \n"
"KIL -t.x; \n"
"# for debug only \n"
"#MOV result.color, t.x; \n"
"END \n";
char program2[1000];
struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
struct temp_texture *tex = get_temp_texture(ctx);
const char *texTarget;
assert(drawpix->StencilFP == 0);
/* replace %s with "RECT" or "2D" */
assert(strlen(program) + 4 < sizeof(program2));
if (tex->Target == GL_TEXTURE_RECTANGLE)
texTarget = "RECT";
else
texTarget = "2D";
_mesa_snprintf(program2, sizeof(program2), program, texTarget);
_mesa_GenPrograms(1, &drawpix->StencilFP);
_mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
_mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
strlen(program2), (const GLubyte *) program2);
}
/**
* One-time init for drawing depth pixels.
*/
static void
init_draw_depth_pixels(struct gl_context *ctx)
{
static const char *program =
"!!ARBfp1.0\n"
"PARAM color = program.local[0]; \n"
"TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
"MOV result.color, color; \n"
"END \n";
char program2[200];
struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
struct temp_texture *tex = get_temp_texture(ctx);
const char *texTarget;
assert(drawpix->DepthFP == 0);
/* replace %s with "RECT" or "2D" */
assert(strlen(program) + 4 < sizeof(program2));
if (tex->Target == GL_TEXTURE_RECTANGLE)
texTarget = "RECT";
else
texTarget = "2D";
_mesa_snprintf(program2, sizeof(program2), program, texTarget);
_mesa_GenPrograms(1, &drawpix->DepthFP);
_mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
_mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
strlen(program2), (const GLubyte *) program2);
}
/**
* Meta implementation of ctx->Driver.DrawPixels() in terms
* of texture mapping and polygon rendering.
*/
void
_mesa_meta_DrawPixels(struct gl_context *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
struct drawpix_state *drawpix = &ctx->Meta->DrawPix;
struct temp_texture *tex = get_temp_texture(ctx);
const struct gl_pixelstore_attrib unpackSave = ctx->Unpack;
const GLuint origStencilMask = ctx->Stencil.WriteMask[0];
struct vertex {
GLfloat x, y, z, s, t;
};
struct vertex verts[4];
GLenum texIntFormat;
GLboolean fallback, newTex;
GLbitfield metaExtraSave = 0x0;
GLuint vbo;
/*
* Determine if we can do the glDrawPixels with texture mapping.
*/
fallback = GL_FALSE;
if (ctx->Fog.Enabled) {
fallback = GL_TRUE;
}
if (_mesa_is_color_format(format)) {
/* use more compact format when possible */
/* XXX disable special case for GL_LUMINANCE for now to work around
* apparent i965 driver bug (see bug #23670).
*/
if (/*format == GL_LUMINANCE ||*/ format == GL_LUMINANCE_ALPHA)
texIntFormat = format;
else
texIntFormat = GL_RGBA;
/* If we're not supposed to clamp the resulting color, then just
* promote our texture to fully float. We could do better by
* just going for the matching set of channels, in floating
* point.
*/
if (ctx->Color.ClampFragmentColor != GL_TRUE &&
ctx->Extensions.ARB_texture_float)
texIntFormat = GL_RGBA32F;
}
else if (_mesa_is_stencil_format(format)) {
if (ctx->Extensions.ARB_fragment_program &&
ctx->Pixel.IndexShift == 0 &&
ctx->Pixel.IndexOffset == 0 &&
type == GL_UNSIGNED_BYTE) {
/* We'll store stencil as alpha. This only works for GLubyte
* image data because of how incoming values are mapped to alpha
* in [0,1].
*/
texIntFormat = GL_ALPHA;
metaExtraSave = (MESA_META_COLOR_MASK |
MESA_META_DEPTH_TEST |
MESA_META_PIXEL_TRANSFER |
MESA_META_SHADER |
MESA_META_STENCIL_TEST);
}
else {
fallback = GL_TRUE;
}
}
else if (_mesa_is_depth_format(format)) {
if (ctx->Extensions.ARB_depth_texture &&
ctx->Extensions.ARB_fragment_program) {
texIntFormat = GL_DEPTH_COMPONENT;
metaExtraSave = (MESA_META_SHADER);
}
else {
fallback = GL_TRUE;
}
}
else {
fallback = GL_TRUE;
}
if (fallback) {
_swrast_DrawPixels(ctx, x, y, width, height,
format, type, unpack, pixels);
return;
}
/*
* Check image size against max texture size, draw as tiles if needed.
*/
if (width > tex->MaxSize || height > tex->MaxSize) {
tiled_draw_pixels(ctx, tex->MaxSize, x, y, width, height,
format, type, unpack, pixels);
return;
}
/* Most GL state applies to glDrawPixels (like blending, stencil, etc),
* but a there's a few things we need to override:
*/
_mesa_meta_begin(ctx, (MESA_META_RASTERIZATION |
MESA_META_SHADER |
MESA_META_TEXTURE |
MESA_META_TRANSFORM |
MESA_META_CLIP |
MESA_META_VERTEX |
MESA_META_VIEWPORT |
metaExtraSave));
newTex = alloc_texture(tex, width, height, texIntFormat);
/* vertex positions, texcoords (after texture allocation!) */
{
const GLfloat x0 = (GLfloat) x;
const GLfloat y0 = (GLfloat) y;
const GLfloat x1 = x + width * ctx->Pixel.ZoomX;
const GLfloat y1 = y + height * ctx->Pixel.ZoomY;
const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
verts[0].x = x0;
verts[0].y = y0;
verts[0].z = z;
verts[0].s = 0.0F;
verts[0].t = 0.0F;
verts[1].x = x1;
verts[1].y = y0;
verts[1].z = z;
verts[1].s = tex->Sright;
verts[1].t = 0.0F;
verts[2].x = x1;
verts[2].y = y1;
verts[2].z = z;
verts[2].s = tex->Sright;
verts[2].t = tex->Ttop;
verts[3].x = x0;
verts[3].y = y1;
verts[3].z = z;
verts[3].s = 0.0F;
verts[3].t = tex->Ttop;
}
if (drawpix->ArrayObj == 0) {
/* one-time setup: create vertex array object */
_mesa_GenVertexArrays(1, &drawpix->ArrayObj);
}
_mesa_BindVertexArray(drawpix->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &vbo);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
verts, GL_DYNAMIC_DRAW_ARB);
/* setup vertex arrays */
_mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
_mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
/* set given unpack params */
ctx->Unpack = *unpack;
_mesa_set_enable(ctx, tex->Target, GL_TRUE);
if (_mesa_is_stencil_format(format)) {
/* Drawing stencil */
GLint bit;
if (!drawpix->StencilFP)
init_draw_stencil_pixels(ctx);
setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
GL_ALPHA, type, pixels);
_mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
_mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE);
/* set all stencil bits to 0 */
_mesa_StencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
_mesa_StencilFunc(GL_ALWAYS, 0, 255);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
/* set stencil bits to 1 where needed */
_mesa_StencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
_mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->StencilFP);
_mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
for (bit = 0; bit < ctx->DrawBuffer->Visual.stencilBits; bit++) {
const GLuint mask = 1 << bit;
if (mask & origStencilMask) {
_mesa_StencilFunc(GL_ALWAYS, mask, mask);
_mesa_StencilMask(mask);
_mesa_ProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 0,
255.0 / mask, 0.5, 0.0, 0.0);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
}
}
else if (_mesa_is_depth_format(format)) {
/* Drawing depth */
if (!drawpix->DepthFP)
init_draw_depth_pixels(ctx);
_mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, drawpix->DepthFP);
_mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
/* polygon color = current raster color */
_mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
ctx->Current.RasterColor);
setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
format, type, pixels);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
else {
/* Drawing RGBA */
setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
format, type, pixels);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
_mesa_set_enable(ctx, tex->Target, GL_FALSE);
_mesa_DeleteBuffersARB(1, &vbo);
/* restore unpack params */
ctx->Unpack = unpackSave;
_mesa_meta_end(ctx);
}
static GLboolean
alpha_test_raster_color(struct gl_context *ctx)
{
GLfloat alpha = ctx->Current.RasterColor[ACOMP];
GLfloat ref = ctx->Color.AlphaRef;
switch (ctx->Color.AlphaFunc) {
case GL_NEVER:
return GL_FALSE;
case GL_LESS:
return alpha < ref;
case GL_EQUAL:
return alpha == ref;
case GL_LEQUAL:
return alpha <= ref;
case GL_GREATER:
return alpha > ref;
case GL_NOTEQUAL:
return alpha != ref;
case GL_GEQUAL:
return alpha >= ref;
case GL_ALWAYS:
return GL_TRUE;
default:
assert(0);
return GL_FALSE;
}
}
/**
* Do glBitmap with a alpha texture quad. Use the alpha test to cull
* the 'off' bits. A bitmap cache as in the gallium/mesa state
* tracker would improve performance a lot.
*/
void
_mesa_meta_Bitmap(struct gl_context *ctx,
GLint x, GLint y, GLsizei width, GLsizei height,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap1)
{
struct bitmap_state *bitmap = &ctx->Meta->Bitmap;
struct temp_texture *tex = get_bitmap_temp_texture(ctx);
const GLenum texIntFormat = GL_ALPHA;
const struct gl_pixelstore_attrib unpackSave = *unpack;
GLubyte fg, bg;
struct vertex {
GLfloat x, y, z, s, t, r, g, b, a;
};
struct vertex verts[4];
GLboolean newTex;
GLubyte *bitmap8;
/*
* Check if swrast fallback is needed.
*/
if (ctx->_ImageTransferState ||
ctx->FragmentProgram._Enabled ||
ctx->Fog.Enabled ||
ctx->Texture._EnabledUnits ||
width > tex->MaxSize ||
height > tex->MaxSize) {
_swrast_Bitmap(ctx, x, y, width, height, unpack, bitmap1);
return;
}
if (ctx->Color.AlphaEnabled && !alpha_test_raster_color(ctx))
return;
/* Most GL state applies to glBitmap (like blending, stencil, etc),
* but a there's a few things we need to override:
*/
_mesa_meta_begin(ctx, (MESA_META_ALPHA_TEST |
MESA_META_PIXEL_STORE |
MESA_META_RASTERIZATION |
MESA_META_SHADER |
MESA_META_TEXTURE |
MESA_META_TRANSFORM |
MESA_META_CLIP |
MESA_META_VERTEX |
MESA_META_VIEWPORT));
if (bitmap->ArrayObj == 0) {
/* one-time setup */
/* create vertex array object */
_mesa_GenVertexArraysAPPLE(1, &bitmap->ArrayObj);
_mesa_BindVertexArrayAPPLE(bitmap->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &bitmap->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
NULL, GL_DYNAMIC_DRAW_ARB);
/* setup vertex arrays */
_mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(s));
_mesa_ColorPointer(4, GL_FLOAT, sizeof(struct vertex), OFFSET(r));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
_mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
_mesa_EnableClientState(GL_COLOR_ARRAY);
}
else {
_mesa_BindVertexArray(bitmap->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, bitmap->VBO);
}
newTex = alloc_texture(tex, width, height, texIntFormat);
/* vertex positions, texcoords, colors (after texture allocation!) */
{
const GLfloat x0 = (GLfloat) x;
const GLfloat y0 = (GLfloat) y;
const GLfloat x1 = (GLfloat) (x + width);
const GLfloat y1 = (GLfloat) (y + height);
const GLfloat z = invert_z(ctx->Current.RasterPos[2]);
GLuint i;
verts[0].x = x0;
verts[0].y = y0;
verts[0].z = z;
verts[0].s = 0.0F;
verts[0].t = 0.0F;
verts[1].x = x1;
verts[1].y = y0;
verts[1].z = z;
verts[1].s = tex->Sright;
verts[1].t = 0.0F;
verts[2].x = x1;
verts[2].y = y1;
verts[2].z = z;
verts[2].s = tex->Sright;
verts[2].t = tex->Ttop;
verts[3].x = x0;
verts[3].y = y1;
verts[3].z = z;
verts[3].s = 0.0F;
verts[3].t = tex->Ttop;
for (i = 0; i < 4; i++) {
verts[i].r = ctx->Current.RasterColor[0];
verts[i].g = ctx->Current.RasterColor[1];
verts[i].b = ctx->Current.RasterColor[2];
verts[i].a = ctx->Current.RasterColor[3];
}
/* upload new vertex data */
_mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
}
/* choose different foreground/background alpha values */
CLAMPED_FLOAT_TO_UBYTE(fg, ctx->Current.RasterColor[ACOMP]);
bg = (fg > 127 ? 0 : 255);
bitmap1 = _mesa_map_pbo_source(ctx, &unpackSave, bitmap1);
if (!bitmap1) {
_mesa_meta_end(ctx);
return;
}
bitmap8 = (GLubyte *) malloc(width * height);
if (bitmap8) {
memset(bitmap8, bg, width * height);
_mesa_expand_bitmap(width, height, &unpackSave, bitmap1,
bitmap8, width, fg);
_mesa_set_enable(ctx, tex->Target, GL_TRUE);
_mesa_set_enable(ctx, GL_ALPHA_TEST, GL_TRUE);
_mesa_AlphaFunc(GL_NOTEQUAL, UBYTE_TO_FLOAT(bg));
setup_drawpix_texture(ctx, tex, newTex, texIntFormat, width, height,
GL_ALPHA, GL_UNSIGNED_BYTE, bitmap8);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
_mesa_set_enable(ctx, tex->Target, GL_FALSE);
free(bitmap8);
}
_mesa_unmap_pbo_source(ctx, &unpackSave);
_mesa_meta_end(ctx);
}
/**
* Check if the call to _mesa_meta_GenerateMipmap() will require a
* software fallback. The fallback path will require that the texture
* images are mapped.
* \return GL_TRUE if a fallback is needed, GL_FALSE otherwise
*/
GLboolean
_mesa_meta_check_generate_mipmap_fallback(struct gl_context *ctx, GLenum target,
struct gl_texture_object *texObj)
{
const GLuint fboSave = ctx->DrawBuffer->Name;
struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
struct gl_texture_image *baseImage;
GLuint srcLevel;
GLenum status;
/* check for fallbacks */
if (!ctx->Extensions.EXT_framebuffer_object ||
target == GL_TEXTURE_3D ||
target == GL_TEXTURE_1D_ARRAY ||
target == GL_TEXTURE_2D_ARRAY) {
return GL_TRUE;
}
srcLevel = texObj->BaseLevel;
baseImage = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
if (!baseImage || _mesa_is_format_compressed(baseImage->TexFormat)) {
return GL_TRUE;
}
if (_mesa_get_format_color_encoding(baseImage->TexFormat) == GL_SRGB &&
!ctx->Extensions.EXT_texture_sRGB_decode) {
/* The texture format is sRGB but we can't turn off sRGB->linear
* texture sample conversion. So we won't be able to generate the
* right colors when rendering. Need to use a fallback.
*/
return GL_TRUE;
}
/*
* Test that we can actually render in the texture's format.
*/
if (!mipmap->FBO)
_mesa_GenFramebuffersEXT(1, &mipmap->FBO);
_mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
if (target == GL_TEXTURE_1D) {
_mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
target, texObj->Name, srcLevel);
}
#if 0
/* other work is needed to enable 3D mipmap generation */
else if (target == GL_TEXTURE_3D) {
GLint zoffset = 0;
_mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
target, texObj->Name, srcLevel, zoffset);
}
#endif
else {
/* 2D / cube */
_mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
target, texObj->Name, srcLevel);
}
status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
_mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
return GL_TRUE;
}
return GL_FALSE;
}
/**
* Compute the texture coordinates for the four vertices of a quad for
* drawing a 2D texture image or slice of a cube/3D texture.
* \param faceTarget GL_TEXTURE_1D/2D/3D or cube face name
* \param slice slice of a 1D/2D array texture or 3D texture
* \param width width of the texture image
* \param height height of the texture image
* \param coords0/1/2/3 returns the computed texcoords
*/
static void
setup_texture_coords(GLenum faceTarget,
GLint slice,
GLint width,
GLint height,
GLfloat coords0[3],
GLfloat coords1[3],
GLfloat coords2[3],
GLfloat coords3[3])
{
static const GLfloat st[4][2] = {
{0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}
};
GLuint i;
GLfloat r;
switch (faceTarget) {
case GL_TEXTURE_1D:
case GL_TEXTURE_2D:
case GL_TEXTURE_3D:
case GL_TEXTURE_2D_ARRAY:
if (faceTarget == GL_TEXTURE_3D)
r = 1.0F / slice;
else if (faceTarget == GL_TEXTURE_2D_ARRAY)
r = slice;
else
r = 0.0F;
coords0[0] = 0.0F; /* s */
coords0[1] = 0.0F; /* t */
coords0[2] = r; /* r */
coords1[0] = 1.0F;
coords1[1] = 0.0F;
coords1[2] = r;
coords2[0] = 1.0F;
coords2[1] = 1.0F;
coords2[2] = r;
coords3[0] = 0.0F;
coords3[1] = 1.0F;
coords3[2] = r;
break;
case GL_TEXTURE_RECTANGLE_ARB:
coords0[0] = 0.0F; /* s */
coords0[1] = 0.0F; /* t */
coords0[2] = 0.0F; /* r */
coords1[0] = width;
coords1[1] = 0.0F;
coords1[2] = 0.0F;
coords2[0] = width;
coords2[1] = height;
coords2[2] = 0.0F;
coords3[0] = 0.0F;
coords3[1] = height;
coords3[2] = 0.0F;
break;
case GL_TEXTURE_1D_ARRAY:
coords0[0] = 0.0F; /* s */
coords0[1] = slice; /* t */
coords0[2] = 0.0F; /* r */
coords1[0] = 1.0f;
coords1[1] = slice;
coords1[2] = 0.0F;
coords2[0] = 1.0F;
coords2[1] = slice;
coords2[2] = 0.0F;
coords3[0] = 0.0F;
coords3[1] = slice;
coords3[2] = 0.0F;
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
/* loop over quad verts */
for (i = 0; i < 4; i++) {
/* Compute sc = +/-scale and tc = +/-scale.
* Not +/-1 to avoid cube face selection ambiguity near the edges,
* though that can still sometimes happen with this scale factor...
*/
const GLfloat scale = 0.9999f;
const GLfloat sc = (2.0f * st[i][0] - 1.0f) * scale;
const GLfloat tc = (2.0f * st[i][1] - 1.0f) * scale;
GLfloat *coord;
switch (i) {
case 0:
coord = coords0;
break;
case 1:
coord = coords1;
break;
case 2:
coord = coords2;
break;
case 3:
coord = coords3;
break;
default:
assert(0);
}
switch (faceTarget) {
case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
coord[0] = 1.0f;
coord[1] = -tc;
coord[2] = -sc;
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
coord[0] = -1.0f;
coord[1] = -tc;
coord[2] = sc;
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
coord[0] = sc;
coord[1] = 1.0f;
coord[2] = tc;
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
coord[0] = sc;
coord[1] = -1.0f;
coord[2] = -tc;
break;
case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
coord[0] = sc;
coord[1] = -tc;
coord[2] = 1.0f;
break;
case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
coord[0] = -sc;
coord[1] = -tc;
coord[2] = -1.0f;
break;
default:
assert(0);
}
}
break;
default:
assert(0 && "unexpected target in meta setup_texture_coords()");
}
}
static void
setup_ff_generate_mipmap(struct gl_context *ctx,
struct gen_mipmap_state *mipmap)
{
struct vertex {
GLfloat x, y, tex[3];
};
if (mipmap->ArrayObj == 0) {
/* one-time setup */
/* create vertex array object */
_mesa_GenVertexArraysAPPLE(1, &mipmap->ArrayObj);
_mesa_BindVertexArrayAPPLE(mipmap->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &mipmap->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
/* setup vertex arrays */
_mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(tex));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
_mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
}
/* setup projection matrix */
_mesa_MatrixMode(GL_PROJECTION);
_mesa_LoadIdentity();
_mesa_Ortho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
}
static struct glsl_sampler *
setup_texture_sampler(GLenum target, struct gen_mipmap_state *mipmap)
{
switch(target) {
case GL_TEXTURE_1D:
mipmap->sampler_1d.type = "sampler1D";
mipmap->sampler_1d.func = "texture1D";
mipmap->sampler_1d.texcoords = "texCoords.x";
return &mipmap->sampler_1d;
case GL_TEXTURE_2D:
mipmap->sampler_2d.type = "sampler2D";
mipmap->sampler_2d.func = "texture2D";
mipmap->sampler_2d.texcoords = "texCoords.xy";
return &mipmap->sampler_2d;
case GL_TEXTURE_3D:
/* Code for mipmap generation with 3D textures is not used yet.
* It's a sw fallback.
*/
mipmap->sampler_3d.type = "sampler3D";
mipmap->sampler_3d.func = "texture3D";
mipmap->sampler_3d.texcoords = "texCoords";
return &mipmap->sampler_3d;
case GL_TEXTURE_CUBE_MAP:
mipmap->sampler_cubemap.type = "samplerCube";
mipmap->sampler_cubemap.func = "textureCube";
mipmap->sampler_cubemap.texcoords = "texCoords";
return &mipmap->sampler_cubemap;
case GL_TEXTURE_1D_ARRAY:
mipmap->sampler_1d_array.type = "sampler1DArray";
mipmap->sampler_1d_array.func = "texture1DArray";
mipmap->sampler_1d_array.texcoords = "texCoords.xy";
return &mipmap->sampler_1d_array;
case GL_TEXTURE_2D_ARRAY:
mipmap->sampler_2d_array.type = "sampler2DArray";
mipmap->sampler_2d_array.func = "texture2DArray";
mipmap->sampler_2d_array.texcoords = "texCoords";
return &mipmap->sampler_2d_array;
default:
_mesa_problem(NULL, "Unexpected texture target 0x%x in"
" setup_texture_sampler()\n", target);
return NULL;
}
}
static void
setup_glsl_generate_mipmap(struct gl_context *ctx,
struct gen_mipmap_state *mipmap,
GLenum target)
{
struct vertex {
GLfloat x, y, tex[3];
};
struct glsl_sampler *sampler;
const char *vs_source;
char *fs_source;
GLuint vs, fs;
void *mem_ctx;
/* Check if already initialized */
if (mipmap->ArrayObj == 0) {
/* create vertex array object */
_mesa_GenVertexArrays(1, &mipmap->ArrayObj);
_mesa_BindVertexArray(mipmap->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &mipmap->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
/* setup vertex arrays */
_mesa_VertexAttribPointerARB(0, 2, GL_FLOAT, GL_FALSE,
sizeof(struct vertex), OFFSET(x));
_mesa_VertexAttribPointerARB(1, 3, GL_FLOAT, GL_FALSE,
sizeof(struct vertex), OFFSET(tex));
}
/* Generate a fragment shader program appropriate for the texture target */
sampler = setup_texture_sampler(target, mipmap);
assert(sampler != NULL);
if (sampler->shader_prog != 0) {
mipmap->ShaderProg = sampler->shader_prog;
return;
}
mem_ctx = ralloc_context(NULL);
if (ctx->API == API_OPENGLES2 || ctx->Const.GLSLVersion < 130) {
const char *fs_template;
const char *extension_mode;
vs_source =
"attribute vec2 position;\n"
"attribute vec3 textureCoords;\n"
"varying vec3 texCoords;\n"
"void main()\n"
"{\n"
" texCoords = textureCoords;\n"
" gl_Position = vec4(position, 0.0, 1.0);\n"
"}\n";
fs_template =
"#extension GL_EXT_texture_array : %s\n"
"uniform %s texSampler;\n"
"varying vec3 texCoords;\n"
"void main()\n"
"{\n"
" gl_FragColor = %s(texSampler, %s);\n"
"}\n";
extension_mode = ((target == GL_TEXTURE_1D_ARRAY) ||
(target == GL_TEXTURE_2D_ARRAY)) ?
"require" : "disable";
fs_source = ralloc_asprintf(mem_ctx, fs_template,
extension_mode, sampler->type,
sampler->func, sampler->texcoords);
}
else {
const char *fs_template;
vs_source =
"#version 130\n"
"in vec2 position;\n"
"in vec3 textureCoords;\n"
"out vec3 texCoords;\n"
"void main()\n"
"{\n"
" texCoords = textureCoords;\n"
" gl_Position = vec4(position, 0.0, 1.0);\n"
"}\n";
fs_template =
"#version 130\n"
"uniform %s texSampler;\n"
"in vec3 texCoords;\n"
"out %s out_color;\n"
"\n"
"void main()\n"
"{\n"
" out_color = texture(texSampler, %s);\n"
"}\n";
fs_source = ralloc_asprintf(mem_ctx, fs_template,
sampler->type, "vec4",
sampler->texcoords);
}
vs = compile_shader_with_debug(ctx, GL_VERTEX_SHADER, vs_source);
fs = compile_shader_with_debug(ctx, GL_FRAGMENT_SHADER, fs_source);
mipmap->ShaderProg = _mesa_CreateProgramObjectARB();
_mesa_AttachShader(mipmap->ShaderProg, fs);
_mesa_DeleteObjectARB(fs);
_mesa_AttachShader(mipmap->ShaderProg, vs);
_mesa_DeleteObjectARB(vs);
_mesa_BindAttribLocationARB(mipmap->ShaderProg, 0, "position");
_mesa_BindAttribLocationARB(mipmap->ShaderProg, 1, "texcoords");
_mesa_EnableVertexAttribArrayARB(0);
_mesa_EnableVertexAttribArrayARB(1);
link_program_with_debug(ctx, mipmap->ShaderProg);
sampler->shader_prog = mipmap->ShaderProg;
ralloc_free(mem_ctx);
}
static void
meta_glsl_generate_mipmap_cleanup(struct gl_context *ctx,
struct gen_mipmap_state *mipmap)
{
if (mipmap->ArrayObj == 0)
return;
_mesa_DeleteVertexArraysAPPLE(1, &mipmap->ArrayObj);
mipmap->ArrayObj = 0;
_mesa_DeleteBuffersARB(1, &mipmap->VBO);
mipmap->VBO = 0;
_mesa_DeleteObjectARB(mipmap->sampler_1d.shader_prog);
_mesa_DeleteObjectARB(mipmap->sampler_2d.shader_prog);
_mesa_DeleteObjectARB(mipmap->sampler_3d.shader_prog);
_mesa_DeleteObjectARB(mipmap->sampler_cubemap.shader_prog);
_mesa_DeleteObjectARB(mipmap->sampler_1d_array.shader_prog);
_mesa_DeleteObjectARB(mipmap->sampler_2d_array.shader_prog);
mipmap->sampler_1d.shader_prog = 0;
mipmap->sampler_2d.shader_prog = 0;
mipmap->sampler_3d.shader_prog = 0;
mipmap->sampler_cubemap.shader_prog = 0;
mipmap->sampler_1d_array.shader_prog = 0;
mipmap->sampler_2d_array.shader_prog = 0;
}
/**
* Called via ctx->Driver.GenerateMipmap()
* Note: We don't yet support 3D textures, 1D/2D array textures or texture
* borders.
*/
void
_mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
struct gl_texture_object *texObj)
{
struct gen_mipmap_state *mipmap = &ctx->Meta->Mipmap;
struct vertex {
GLfloat x, y, tex[3];
};
struct vertex verts[4];
const GLuint baseLevel = texObj->BaseLevel;
const GLuint maxLevel = texObj->MaxLevel;
const GLint maxLevelSave = texObj->MaxLevel;
const GLboolean genMipmapSave = texObj->GenerateMipmap;
const GLenum srgbBufferSave = ctx->Color.sRGBEnabled;
const GLuint fboSave = ctx->DrawBuffer->Name;
const GLuint currentTexUnitSave = ctx->Texture.CurrentUnit;
const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader &&
ctx->Extensions.ARB_fragment_shader &&
(ctx->API != API_OPENGLES);
GLenum faceTarget;
GLuint dstLevel;
const GLint slice = 0;
GLuint samplerSave;
if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
_mesa_generate_mipmap(ctx, target, texObj);
return;
}
if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {
faceTarget = target;
target = GL_TEXTURE_CUBE_MAP;
}
else {
faceTarget = target;
}
_mesa_meta_begin(ctx, MESA_META_ALL);
/* Choose between glsl version and fixed function version of
* GenerateMipmap function.
*/
if (use_glsl_version) {
setup_glsl_generate_mipmap(ctx, mipmap, target);
_mesa_UseProgramObjectARB(mipmap->ShaderProg);
}
else {
setup_ff_generate_mipmap(ctx, mipmap);
_mesa_set_enable(ctx, target, GL_TRUE);
}
_mesa_BindVertexArray(mipmap->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, mipmap->VBO);
samplerSave = ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
if (currentTexUnitSave != 0)
_mesa_BindTexture(target, texObj->Name);
if (!mipmap->FBO) {
_mesa_GenFramebuffersEXT(1, &mipmap->FBO);
}
if (!mipmap->Sampler) {
_mesa_GenSamplers(1, &mipmap->Sampler);
_mesa_BindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler);
_mesa_SamplerParameteri(mipmap->Sampler,
GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);
_mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
_mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
_mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
_mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
/* We don't want to encode or decode sRGB values; treat them as linear.
* This is not technically correct for GLES3 but we don't get any API
* error at the moment.
*/
if (ctx->Extensions.EXT_texture_sRGB_decode) {
_mesa_SamplerParameteri(mipmap->Sampler, GL_TEXTURE_SRGB_DECODE_EXT,
GL_SKIP_DECODE_EXT);
}
} else {
_mesa_BindSampler(ctx->Texture.CurrentUnit, mipmap->Sampler);
}
_mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, mipmap->FBO);
if (ctx->API == API_OPENGL || ctx->API == API_OPENGLES)
_mesa_TexParameteri(target, GL_GENERATE_MIPMAP, GL_FALSE);
else
assert(!genMipmapSave);
if ((ctx->Extensions.EXT_framebuffer_sRGB &&
_mesa_is_desktop_gl(ctx)) ||
_mesa_is_gles3(ctx)) {
_mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_FALSE);
}
/* Setup texture coordinates */
setup_texture_coords(faceTarget,
slice,
0, 0, /* width, height never used here */
verts[0].tex,
verts[1].tex,
verts[2].tex,
verts[3].tex);
/* setup vertex positions */
verts[0].x = -1.0F;
verts[0].y = -1.0F;
verts[1].x = 1.0F;
verts[1].y = -1.0F;
verts[2].x = 1.0F;
verts[2].y = 1.0F;
verts[3].x = -1.0F;
verts[3].y = 1.0F;
/* upload vertex data */
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
verts, GL_DYNAMIC_DRAW_ARB);
/* texture is already locked, unlock now */
_mesa_unlock_texture(ctx, texObj);
for (dstLevel = baseLevel + 1; dstLevel <= maxLevel; dstLevel++) {
const struct gl_texture_image *srcImage;
const GLuint srcLevel = dstLevel - 1;
GLsizei srcWidth, srcHeight, srcDepth;
GLsizei dstWidth, dstHeight, dstDepth;
GLenum status;
srcImage = _mesa_select_tex_image(ctx, texObj, faceTarget, srcLevel);
assert(srcImage->Border == 0);
/* src size */
srcWidth = srcImage->Width;
srcHeight = srcImage->Height;
srcDepth = srcImage->Depth;
/* new dst size */
dstWidth = MAX2(1, srcWidth / 2);
dstHeight = MAX2(1, srcHeight / 2);
dstDepth = MAX2(1, srcDepth / 2);
if (dstWidth == srcImage->Width &&
dstHeight == srcImage->Height &&
dstDepth == srcImage->Depth) {
/* all done */
break;
}
/* Allocate storage for the destination mipmap image(s) */
/* Set MaxLevel large enough to hold the new level when we allocate it */
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel);
if (!_mesa_prepare_mipmap_level(ctx, texObj, dstLevel,
dstWidth, dstHeight, dstDepth,
srcImage->Border,
srcImage->InternalFormat,
srcImage->TexFormat)) {
/* All done. We either ran out of memory or we would go beyond the
* last valid level of an immutable texture if we continued.
*/
break;
}
/* limit minification to src level */
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
/* Set to draw into the current dstLevel */
if (target == GL_TEXTURE_1D) {
_mesa_FramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
target,
texObj->Name,
dstLevel);
}
else if (target == GL_TEXTURE_3D) {
GLint zoffset = 0; /* XXX unfinished */
_mesa_FramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
target,
texObj->Name,
dstLevel, zoffset);
}
else {
/* 2D / cube */
_mesa_FramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
faceTarget,
texObj->Name,
dstLevel);
}
_mesa_DrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
/* sanity check */
status = _mesa_CheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
_mesa_problem(ctx, "Unexpected incomplete framebuffer in "
"_mesa_meta_GenerateMipmap()");
break;
}
assert(dstWidth == ctx->DrawBuffer->Width);
assert(dstHeight == ctx->DrawBuffer->Height);
/* setup viewport */
_mesa_set_viewport(ctx, 0, 0, dstWidth, dstHeight);
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
if (ctx->Extensions.EXT_framebuffer_sRGB && srgbBufferSave) {
_mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_TRUE);
}
_mesa_lock_texture(ctx, texObj); /* relock */
_mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
_mesa_meta_end(ctx);
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
if (genMipmapSave)
_mesa_TexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave);
_mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboSave);
}
/**
* Determine the GL data type to use for the temporary image read with
* ReadPixels() and passed to Tex[Sub]Image().
*/
static GLenum
get_temp_image_type(struct gl_context *ctx, gl_format format)
{
GLenum baseFormat;
baseFormat = _mesa_get_format_base_format(format);
switch (baseFormat) {
case GL_RGBA:
case GL_RGB:
case GL_RG:
case GL_RED:
case GL_ALPHA:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
case GL_INTENSITY:
if (ctx->DrawBuffer->Visual.redBits <= 8) {
return GL_UNSIGNED_BYTE;
} else if (ctx->DrawBuffer->Visual.redBits <= 16) {
return GL_UNSIGNED_SHORT;
} else {
GLenum datatype = _mesa_get_format_datatype(format);
if (datatype == GL_INT || datatype == GL_UNSIGNED_INT)
return datatype;
return GL_FLOAT;
}
case GL_DEPTH_COMPONENT:
return GL_UNSIGNED_INT;
case GL_DEPTH_STENCIL:
return GL_UNSIGNED_INT_24_8;
default:
_mesa_problem(ctx, "Unexpected format %d in get_temp_image_type()",
baseFormat);
return 0;
}
}
/**
* Helper for _mesa_meta_CopyTexSubImage1/2/3D() functions.
* Have to be careful with locking and meta state for pixel transfer.
*/
void
_mesa_meta_CopyTexSubImage(struct gl_context *ctx, GLuint dims,
struct gl_texture_image *texImage,
GLint xoffset, GLint yoffset, GLint zoffset,
struct gl_renderbuffer *rb,
GLint x, GLint y,
GLsizei width, GLsizei height)
{
struct gl_texture_object *texObj = texImage->TexObject;
GLenum format, type;
GLint bpp;
void *buf;
/* Choose format/type for temporary image buffer */
format = _mesa_get_format_base_format(texImage->TexFormat);
if (format == GL_LUMINANCE ||
format == GL_LUMINANCE_ALPHA ||
format == GL_INTENSITY) {
/* We don't want to use GL_LUMINANCE, GL_INTENSITY, etc. for the
* temp image buffer because glReadPixels will do L=R+G+B which is
* not what we want (should be L=R).
*/
format = GL_RGBA;
}
type = get_temp_image_type(ctx, texImage->TexFormat);
if (_mesa_is_format_integer_color(texImage->TexFormat)) {
format = _mesa_base_format_to_integer_format(format);
}
bpp = _mesa_bytes_per_pixel(format, type);
if (bpp <= 0) {
_mesa_problem(ctx, "Bad bpp in _mesa_meta_CopyTexSubImage()");
return;
}
/*
* Alloc image buffer (XXX could use a PBO)
*/
buf = malloc(width * height * bpp);
if (!buf) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage%uD", dims);
return;
}
_mesa_unlock_texture(ctx, texObj); /* need to unlock first */
/*
* Read image from framebuffer (disable pixel transfer ops)
*/
_mesa_meta_begin(ctx, MESA_META_PIXEL_STORE | MESA_META_PIXEL_TRANSFER);
ctx->Driver.ReadPixels(ctx, x, y, width, height,
format, type, &ctx->Pack, buf);
_mesa_meta_end(ctx);
_mesa_update_state(ctx); /* to update pixel transfer state */
/*
* Store texture data (with pixel transfer ops)
*/
_mesa_meta_begin(ctx, MESA_META_PIXEL_STORE);
ctx->Driver.TexSubImage(ctx, dims, texImage,
xoffset, yoffset, zoffset, width, height, 1,
format, type, buf, &ctx->Unpack);
_mesa_meta_end(ctx);
_mesa_lock_texture(ctx, texObj); /* re-lock */
free(buf);
}
/**
* Decompress a texture image by drawing a quad with the compressed
* texture and reading the pixels out of the color buffer.
* \param slice which slice of a 3D texture or layer of a 1D/2D texture
* \param destFormat format, ala glReadPixels
* \param destType type, ala glReadPixels
* \param dest destination buffer
* \param destRowLength dest image rowLength (ala GL_PACK_ROW_LENGTH)
*/
static void
decompress_texture_image(struct gl_context *ctx,
struct gl_texture_image *texImage,
GLuint slice,
GLenum destFormat, GLenum destType,
GLvoid *dest)
{
struct decompress_state *decompress = &ctx->Meta->Decompress;
struct gl_texture_object *texObj = texImage->TexObject;
const GLint width = texImage->Width;
const GLint height = texImage->Height;
const GLenum target = texObj->Target;
GLenum faceTarget;
struct vertex {
GLfloat x, y, tex[3];
};
struct vertex verts[4];
GLuint fboDrawSave, fboReadSave;
GLuint rbSave;
GLuint samplerSave;
if (slice > 0) {
assert(target == GL_TEXTURE_3D ||
target == GL_TEXTURE_2D_ARRAY);
}
if (target == GL_TEXTURE_CUBE_MAP) {
faceTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X + texImage->Face;
}
else {
faceTarget = target;
}
/* save fbo bindings (not saved by _mesa_meta_begin()) */
fboDrawSave = ctx->DrawBuffer->Name;
fboReadSave = ctx->ReadBuffer->Name;
rbSave = ctx->CurrentRenderbuffer ? ctx->CurrentRenderbuffer->Name : 0;
_mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_PIXEL_STORE);
samplerSave = ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
/* Create/bind FBO/renderbuffer */
if (decompress->FBO == 0) {
_mesa_GenFramebuffersEXT(1, &decompress->FBO);
_mesa_GenRenderbuffersEXT(1, &decompress->RBO);
_mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, decompress->FBO);
_mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, decompress->RBO);
_mesa_FramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT,
decompress->RBO);
}
else {
_mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, decompress->FBO);
}
/* alloc dest surface */
if (width > decompress->Width || height > decompress->Height) {
_mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, decompress->RBO);
_mesa_RenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA,
width, height);
decompress->Width = width;
decompress->Height = height;
}
/* setup VBO data */
if (decompress->ArrayObj == 0) {
/* create vertex array object */
_mesa_GenVertexArrays(1, &decompress->ArrayObj);
_mesa_BindVertexArray(decompress->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &decompress->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, decompress->VBO);
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
NULL, GL_DYNAMIC_DRAW_ARB);
/* setup vertex arrays */
_mesa_VertexPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_TexCoordPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(tex));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
_mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
}
else {
_mesa_BindVertexArray(decompress->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, decompress->VBO);
}
if (!decompress->Sampler) {
_mesa_GenSamplers(1, &decompress->Sampler);
_mesa_BindSampler(ctx->Texture.CurrentUnit, decompress->Sampler);
/* nearest filtering */
_mesa_SamplerParameteri(decompress->Sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
_mesa_SamplerParameteri(decompress->Sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
/* No sRGB decode or encode.*/
if (ctx->Extensions.EXT_texture_sRGB_decode) {
_mesa_SamplerParameteri(decompress->Sampler, GL_TEXTURE_SRGB_DECODE_EXT,
GL_SKIP_DECODE_EXT);
}
} else {
_mesa_BindSampler(ctx->Texture.CurrentUnit, decompress->Sampler);
}
setup_texture_coords(faceTarget, slice, width, height,
verts[0].tex,
verts[1].tex,
verts[2].tex,
verts[3].tex);
/* setup vertex positions */
verts[0].x = 0.0F;
verts[0].y = 0.0F;
verts[1].x = width;
verts[1].y = 0.0F;
verts[2].x = width;
verts[2].y = height;
verts[3].x = 0.0F;
verts[3].y = height;
/* upload new vertex data */
_mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
/* setup texture state */
_mesa_BindTexture(target, texObj->Name);
_mesa_set_enable(ctx, target, GL_TRUE);
{
/* save texture object state */
const GLint baseLevelSave = texObj->BaseLevel;
const GLint maxLevelSave = texObj->MaxLevel;
/* restrict sampling to the texture level of interest */
if (target != GL_TEXTURE_RECTANGLE_ARB) {
_mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, texImage->Level);
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, texImage->Level);
}
/* No sRGB decode or encode.*/
if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.EXT_framebuffer_sRGB)
|| _mesa_is_gles3(ctx)) {
_mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB_EXT, GL_FALSE);
}
/* render quad w/ texture into renderbuffer */
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
/* Restore texture object state, the texture binding will
* be restored by _mesa_meta_end().
*/
if (target != GL_TEXTURE_RECTANGLE_ARB) {
_mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
_mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
}
}
/* read pixels from renderbuffer */
{
GLenum baseTexFormat = texImage->_BaseFormat;
GLenum destBaseFormat = _mesa_base_tex_format(ctx, destFormat);
/* The pixel transfer state will be set to default values at this point
* (see MESA_META_PIXEL_TRANSFER) so pixel transfer ops are effectively
* turned off (as required by glGetTexImage) but we need to handle some
* special cases. In particular, single-channel texture values are
* returned as red and two-channel texture values are returned as
* red/alpha.
*/
if ((baseTexFormat == GL_LUMINANCE ||
baseTexFormat == GL_LUMINANCE_ALPHA ||
baseTexFormat == GL_INTENSITY) ||
/* If we're reading back an RGB(A) texture (using glGetTexImage) as
* luminance then we need to return L=tex(R).
*/
((baseTexFormat == GL_RGBA ||
baseTexFormat == GL_RGB ||
baseTexFormat == GL_RG) &&
(destBaseFormat == GL_LUMINANCE ||
destBaseFormat == GL_LUMINANCE_ALPHA ||
destBaseFormat == GL_LUMINANCE_INTEGER_EXT ||
destBaseFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT))) {
/* Green and blue must be zero */
_mesa_PixelTransferf(GL_GREEN_SCALE, 0.0f);
_mesa_PixelTransferf(GL_BLUE_SCALE, 0.0f);
}
_mesa_ReadPixels(0, 0, width, height, destFormat, destType, dest);
}
/* disable texture unit */
_mesa_set_enable(ctx, target, GL_FALSE);
_mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
_mesa_meta_end(ctx);
/* restore fbo bindings */
if (fboDrawSave == fboReadSave) {
_mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboDrawSave);
}
else {
_mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fboDrawSave);
_mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fboReadSave);
}
_mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, rbSave);
}
/**
* This is just a wrapper around _mesa_get_tex_image() and
* decompress_texture_image(). Meta functions should not be directly called
* from core Mesa.
*/
void
_mesa_meta_GetTexImage(struct gl_context *ctx,
GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage)
{
/* We can only use the decompress-with-blit method here if the texels are
* unsigned, normalized values. We could handle signed and unnormalized
* with floating point renderbuffers...
*/
if (_mesa_is_format_compressed(texImage->TexFormat) &&
_mesa_get_format_datatype(texImage->TexFormat)
== GL_UNSIGNED_NORMALIZED) {
struct gl_texture_object *texObj = texImage->TexObject;
const GLuint slice = 0; /* only 2D compressed textures for now */
/* Need to unlock the texture here to prevent deadlock... */
_mesa_unlock_texture(ctx, texObj);
decompress_texture_image(ctx, texImage, slice, format, type, pixels);
/* ... and relock it */
_mesa_lock_texture(ctx, texObj);
}
else {
_mesa_get_teximage(ctx, format, type, pixels, texImage);
}
}
/**
* Meta implementation of ctx->Driver.DrawTex() in terms
* of polygon rendering.
*/
void
_mesa_meta_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z,
GLfloat width, GLfloat height)
{
#if FEATURE_OES_draw_texture
struct drawtex_state *drawtex = &ctx->Meta->DrawTex;
struct vertex {
GLfloat x, y, z, st[MAX_TEXTURE_UNITS][2];
};
struct vertex verts[4];
GLuint i;
_mesa_meta_begin(ctx, (MESA_META_RASTERIZATION |
MESA_META_SHADER |
MESA_META_TRANSFORM |
MESA_META_VERTEX |
MESA_META_VIEWPORT));
if (drawtex->ArrayObj == 0) {
/* one-time setup */
GLint active_texture;
/* create vertex array object */
_mesa_GenVertexArrays(1, &drawtex->ArrayObj);
_mesa_BindVertexArray(drawtex->ArrayObj);
/* create vertex array buffer */
_mesa_GenBuffersARB(1, &drawtex->VBO);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, drawtex->VBO);
_mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(verts),
NULL, GL_DYNAMIC_DRAW_ARB);
/* client active texture is not part of the array object */
active_texture = ctx->Array.ActiveTexture;
/* setup vertex arrays */
_mesa_VertexPointer(3, GL_FLOAT, sizeof(struct vertex), OFFSET(x));
_mesa_EnableClientState(GL_VERTEX_ARRAY);
for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
_mesa_ClientActiveTextureARB(GL_TEXTURE0 + i);
_mesa_TexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), OFFSET(st[i]));
_mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY);
}
/* restore client active texture */
_mesa_ClientActiveTextureARB(GL_TEXTURE0 + active_texture);
}
else {
_mesa_BindVertexArray(drawtex->ArrayObj);
_mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, drawtex->VBO);
}
/* vertex positions, texcoords */
{
const GLfloat x1 = x + width;
const GLfloat y1 = y + height;
z = CLAMP(z, 0.0, 1.0);
z = invert_z(z);
verts[0].x = x;
verts[0].y = y;
verts[0].z = z;
verts[1].x = x1;
verts[1].y = y;
verts[1].z = z;
verts[2].x = x1;
verts[2].y = y1;
verts[2].z = z;
verts[3].x = x;
verts[3].y = y1;
verts[3].z = z;
for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
const struct gl_texture_object *texObj;
const struct gl_texture_image *texImage;
GLfloat s, t, s1, t1;
GLuint tw, th;
if (!ctx->Texture.Unit[i]._ReallyEnabled) {
GLuint j;
for (j = 0; j < 4; j++) {
verts[j].st[i][0] = 0.0f;
verts[j].st[i][1] = 0.0f;
}
continue;
}
texObj = ctx->Texture.Unit[i]._Current;
texImage = texObj->Image[0][texObj->BaseLevel];
tw = texImage->Width2;
th = texImage->Height2;
s = (GLfloat) texObj->CropRect[0] / tw;
t = (GLfloat) texObj->CropRect[1] / th;
s1 = (GLfloat) (texObj->CropRect[0] + texObj->CropRect[2]) / tw;
t1 = (GLfloat) (texObj->CropRect[1] + texObj->CropRect[3]) / th;
verts[0].st[i][0] = s;
verts[0].st[i][1] = t;
verts[1].st[i][0] = s1;
verts[1].st[i][1] = t;
verts[2].st[i][0] = s1;
verts[2].st[i][1] = t1;
verts[3].st[i][0] = s;
verts[3].st[i][1] = t1;
}
_mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
}
_mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
_mesa_meta_end(ctx);
#endif /* FEATURE_OES_draw_texture */
}