/*
* Mesa 3-D graphics library
* Version: 7.1
*
* Copyright (C) 1999-2007 Brian Paul 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.
*/
/**
* \file xm_api.c
*
* All the XMesa* API functions.
*
*
* NOTES:
*
* The window coordinate system origin (0,0) is in the lower-left corner
* of the window. X11's window coordinate origin is in the upper-left
* corner of the window. Therefore, most drawing functions in this
* file have to flip Y coordinates.
*
* Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
* in support for the MIT Shared Memory extension. If enabled, when you
* use an Ximage for the back buffer in double buffered mode, the "swap"
* operation will be faster. You must also link with -lXext.
*
* Byte swapping: If the Mesa host and the X display use a different
* byte order then there's some trickiness to be aware of when using
* XImages. The byte ordering used for the XImage is that of the X
* display, not the Mesa host.
* The color-to-pixel encoding for True/DirectColor must be done
* according to the display's visual red_mask, green_mask, and blue_mask.
* If XPutPixel is used to put a pixel into an XImage then XPutPixel will
* do byte swapping if needed. If one wants to directly "poke" the pixel
* into the XImage's buffer then the pixel must be byte swapped first. In
* Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
* and use XPutPixel everywhere except in the implementation of
* glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
* instead of using XPutPixel we "poke" our values after byte-swapping
* the clear pixel value if needed.
*
*/
#ifdef __CYGWIN__
#undef WIN32
#undef __WIN32__
#endif
#include "glxheader.h"
#include "xmesaP.h"
#include "main/context.h"
#include "main/extensions.h"
#include "main/framebuffer.h"
#include "main/imports.h"
#include "main/macros.h"
#include "main/renderbuffer.h"
#include "main/teximage.h"
#include "glapi/glthread.h"
#include "swrast/swrast.h"
#include "swrast/s_renderbuffer.h"
#include "swrast_setup/swrast_setup.h"
#include "vbo/vbo.h"
#include "tnl/tnl.h"
#include "tnl/t_context.h"
#include "tnl/t_pipeline.h"
#include "drivers/common/driverfuncs.h"
#include "drivers/common/meta.h"
/**
* Global X driver lock
*/
_glthread_Mutex _xmesa_lock;
/**********************************************************************/
/***** X Utility Functions *****/
/**********************************************************************/
/**
* Return the host's byte order as LSBFirst or MSBFirst ala X.
*/
static int host_byte_order( void )
{
int i = 1;
char *cptr = (char *) &i;
return (*cptr==1) ? LSBFirst : MSBFirst;
}
/**
* Check if the X Shared Memory extension is available.
* Return: 0 = not available
* 1 = shared XImage support available
* 2 = shared Pixmap support available also
*/
static int check_for_xshm( XMesaDisplay *display )
{
#if defined(USE_XSHM)
int ignore;
if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
/* Note: we're no longer calling XShmQueryVersion() here. It seems
* to be flakey (triggers a spurious X protocol error when we close
* one display connection and start using a new one. XShm has been
* around a long time and hasn't changed so if MIT_SHM is supported
* we assume we're good to go.
*/
return 2;
}
else {
return 0;
}
#else
/* No XSHM support */
return 0;
#endif
}
/**
* Apply gamma correction to an intensity value in [0..max]. Return the
* new intensity value.
*/
static GLint
gamma_adjust( GLfloat gamma, GLint value, GLint max )
{
if (gamma == 1.0) {
return value;
}
else {
double x = (double) value / (double) max;
return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma));
}
}
/**
* Return the true number of bits per pixel for XImages.
* For example, if we request a 24-bit deep visual we may actually need/get
* 32bpp XImages. This function returns the appropriate bpp.
* Input: dpy - the X display
* visinfo - desribes the visual to be used for XImages
* Return: true number of bits per pixel for XImages
*/
static int
bits_per_pixel( XMesaVisual xmv )
{
XMesaDisplay *dpy = xmv->display;
XMesaVisualInfo visinfo = xmv->visinfo;
XMesaImage *img;
int bitsPerPixel;
/* Create a temporary XImage */
img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
ZPixmap, 0, /*format, offset*/
(char*) MALLOC(8), /*data*/
1, 1, /*width, height*/
32, /*bitmap_pad*/
0 /*bytes_per_line*/
);
assert(img);
/* grab the bits/pixel value */
bitsPerPixel = img->bits_per_pixel;
/* free the XImage */
free( img->data );
img->data = NULL;
XMesaDestroyImage( img );
return bitsPerPixel;
}
/*
* Determine if a given X window ID is valid (window exists).
* Do this by calling XGetWindowAttributes() for the window and
* checking if we catch an X error.
* Input: dpy - the display
* win - the window to check for existance
* Return: GL_TRUE - window exists
* GL_FALSE - window doesn't exist
*/
static GLboolean WindowExistsFlag;
static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
{
(void) dpy;
if (xerr->error_code == BadWindow) {
WindowExistsFlag = GL_FALSE;
}
return 0;
}
static GLboolean window_exists( XMesaDisplay *dpy, Window win )
{
XWindowAttributes wa;
int (*old_handler)( XMesaDisplay*, XErrorEvent* );
WindowExistsFlag = GL_TRUE;
old_handler = XSetErrorHandler(window_exists_err_handler);
XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
XSetErrorHandler(old_handler);
return WindowExistsFlag;
}
static Status
get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
{
Window root;
Status stat;
int xpos, ypos;
unsigned int w, h, bw, depth;
stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
*width = w;
*height = h;
return stat;
}
/**
* Return the size of the window (or pixmap) that corresponds to the
* given XMesaBuffer.
* \param width returns width in pixels
* \param height returns height in pixels
*/
void
xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
GLuint *width, GLuint *height)
{
Status stat;
_glthread_LOCK_MUTEX(_xmesa_lock);
XSync(b->xm_visual->display, 0); /* added for Chromium */
stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
_glthread_UNLOCK_MUTEX(_xmesa_lock);
if (!stat) {
/* probably querying a window that's recently been destroyed */
_mesa_warning(NULL, "XGetGeometry failed!\n");
*width = *height = 1;
}
}
/**********************************************************************/
/***** Linked list of XMesaBuffers *****/
/**********************************************************************/
XMesaBuffer XMesaBufferList = NULL;
/**
* Allocate a new XMesaBuffer object which corresponds to the given drawable.
* Note that XMesaBuffer is derived from struct gl_framebuffer.
* The new XMesaBuffer will not have any size (Width=Height=0).
*
* \param d the corresponding X drawable (window or pixmap)
* \param type either WINDOW, PIXMAP or PBUFFER, describing d
* \param vis the buffer's visual
* \param cmap the window's colormap, if known.
* \return new XMesaBuffer or NULL if any problem
*/
static XMesaBuffer
create_xmesa_buffer(XMesaDrawable d, BufferType type,
XMesaVisual vis, XMesaColormap cmap)
{
XMesaBuffer b;
ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
if (!b)
return NULL;
b->display = vis->display;
b->xm_visual = vis;
b->type = type;
b->cmap = cmap;
_mesa_initialize_window_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
b->mesa_buffer.Delete = xmesa_delete_framebuffer;
/*
* Front renderbuffer
*/
b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_FALSE);
if (!b->frontxrb) {
free(b);
return NULL;
}
b->frontxrb->Parent = b;
b->frontxrb->drawable = d;
b->frontxrb->pixmap = (XMesaPixmap) d;
_mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
&b->frontxrb->Base.Base);
/*
* Back renderbuffer
*/
if (vis->mesa_visual.doubleBufferMode) {
b->backxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_TRUE);
if (!b->backxrb) {
/* XXX free front xrb too */
free(b);
return NULL;
}
b->backxrb->Parent = b;
/* determine back buffer implementation */
b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
_mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
&b->backxrb->Base.Base);
}
/*
* Other renderbuffer (depth, stencil, etc)
*/
_swrast_add_soft_renderbuffers(&b->mesa_buffer,
GL_FALSE, /* color */
vis->mesa_visual.haveDepthBuffer,
vis->mesa_visual.haveStencilBuffer,
vis->mesa_visual.haveAccumBuffer,
GL_FALSE, /* software alpha buffer */
vis->mesa_visual.numAuxBuffers > 0 );
/* GLX_EXT_texture_from_pixmap */
b->TextureTarget = 0;
b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
b->TextureMipmap = 0;
/* insert buffer into linked list */
b->Next = XMesaBufferList;
XMesaBufferList = b;
return b;
}
/**
* Find an XMesaBuffer by matching X display and colormap but NOT matching
* the notThis buffer.
*/
XMesaBuffer
xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
{
XMesaBuffer b;
for (b=XMesaBufferList; b; b=b->Next) {
if (b->display==dpy && b->cmap==cmap && b!=notThis) {
return b;
}
}
return NULL;
}
/**
* Remove buffer from linked list, delete if no longer referenced.
*/
static void
xmesa_free_buffer(XMesaBuffer buffer)
{
XMesaBuffer prev = NULL, b;
for (b = XMesaBufferList; b; b = b->Next) {
if (b == buffer) {
struct gl_framebuffer *fb = &buffer->mesa_buffer;
/* unlink buffer from list */
if (prev)
prev->Next = buffer->Next;
else
XMesaBufferList = buffer->Next;
/* mark as delete pending */
fb->DeletePending = GL_TRUE;
/* Since the X window for the XMesaBuffer is going away, we don't
* want to dereference this pointer in the future.
*/
b->frontxrb->drawable = 0;
/* Unreference. If count = zero we'll really delete the buffer */
_mesa_reference_framebuffer(&fb, NULL);
return;
}
/* continue search */
prev = b;
}
/* buffer not found in XMesaBufferList */
_mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
}
/**********************************************************************/
/***** Misc Private Functions *****/
/**********************************************************************/
/**
* Setup RGB rendering for a window with a True/DirectColor visual.
*/
static void
setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
{
unsigned long rmask, gmask, bmask;
(void) buffer;
(void) cmap;
/* Compute red multiplier (mask) and bit shift */
v->rshift = 0;
rmask = GET_REDMASK(v);
while ((rmask & 1)==0) {
v->rshift++;
rmask = rmask >> 1;
}
/* Compute green multiplier (mask) and bit shift */
v->gshift = 0;
gmask = GET_GREENMASK(v);
while ((gmask & 1)==0) {
v->gshift++;
gmask = gmask >> 1;
}
/* Compute blue multiplier (mask) and bit shift */
v->bshift = 0;
bmask = GET_BLUEMASK(v);
while ((bmask & 1)==0) {
v->bshift++;
bmask = bmask >> 1;
}
/*
* Compute component-to-pixel lookup tables and dithering kernel
*/
{
static GLubyte kernel[16] = {
0*16, 8*16, 2*16, 10*16,
12*16, 4*16, 14*16, 6*16,
3*16, 11*16, 1*16, 9*16,
15*16, 7*16, 13*16, 5*16,
};
GLint rBits = _mesa_bitcount(rmask);
GLint gBits = _mesa_bitcount(gmask);
GLint bBits = _mesa_bitcount(bmask);
GLint maxBits;
GLuint i;
/* convert pixel components in [0,_mask] to RGB values in [0,255] */
for (i=0; i<=rmask; i++)
v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
for (i=0; i<=gmask; i++)
v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
for (i=0; i<=bmask; i++)
v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
/* convert RGB values from [0,255] to pixel components */
for (i=0;i<256;i++) {
GLint r = gamma_adjust(v->RedGamma, i, 255);
GLint g = gamma_adjust(v->GreenGamma, i, 255);
GLint b = gamma_adjust(v->BlueGamma, i, 255);
v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
}
/* overflow protection */
for (i=256;i<512;i++) {
v->RtoPixel[i] = v->RtoPixel[255];
v->GtoPixel[i] = v->GtoPixel[255];
v->BtoPixel[i] = v->BtoPixel[255];
}
/* setup dithering kernel */
maxBits = rBits;
if (gBits > maxBits) maxBits = gBits;
if (bBits > maxBits) maxBits = bBits;
for (i=0;i<16;i++) {
v->Kernel[i] = kernel[i] >> maxBits;
}
v->undithered_pf = PF_Truecolor;
v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
}
/*
* Now check for TrueColor visuals which we can optimize.
*/
if ( GET_REDMASK(v) ==0x0000ff
&& GET_GREENMASK(v)==0x00ff00
&& GET_BLUEMASK(v) ==0xff0000
&& CHECK_BYTE_ORDER(v)
&& v->BitsPerPixel==32
&& v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
/* common 32 bpp config used on SGI, Sun */
v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
}
else if (GET_REDMASK(v) == 0xff0000
&& GET_GREENMASK(v)== 0x00ff00
&& GET_BLUEMASK(v) == 0x0000ff
&& CHECK_BYTE_ORDER(v)
&& v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
if (v->BitsPerPixel==32) {
/* if 32 bpp, and visual indicates 8 bpp alpha channel */
if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
else
v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
}
else if (v->BitsPerPixel == 24) {
v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
}
}
else if (GET_REDMASK(v) ==0xf800
&& GET_GREENMASK(v)==0x07e0
&& GET_BLUEMASK(v) ==0x001f
&& CHECK_BYTE_ORDER(v)
&& v->BitsPerPixel==16
&& v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
/* 5-6-5 RGB */
v->undithered_pf = PF_5R6G5B;
v->dithered_pf = PF_Dither_5R6G5B;
}
}
/**
* When a context is bound for the first time, we can finally finish
* initializing the context's visual and buffer information.
* \param v the XMesaVisual to initialize
* \param b the XMesaBuffer to initialize (may be NULL)
* \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
* \param window the window/pixmap we're rendering into
* \param cmap the colormap associated with the window/pixmap
* \return GL_TRUE=success, GL_FALSE=failure
*/
static GLboolean
initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
XMesaDrawable window,
XMesaColormap cmap)
{
const int xclass = v->visualType;
ASSERT(!b || b->xm_visual == v);
/* Save true bits/pixel */
v->BitsPerPixel = bits_per_pixel(v);
assert(v->BitsPerPixel > 0);
/* RGB WINDOW:
* We support RGB rendering into almost any kind of visual.
*/
if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
setup_truecolor( v, b, cmap );
}
else {
_mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
return GL_FALSE;
}
v->mesa_visual.indexBits = 0;
if (_mesa_getenv("MESA_NO_DITHER")) {
v->dithered_pf = v->undithered_pf;
}
/*
* If MESA_INFO env var is set print out some debugging info
* which can help Brian figure out what's going on when a user
* reports bugs.
*/
if (_mesa_getenv("MESA_INFO")) {
printf("X/Mesa visual = %p\n", (void *) v);
printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
printf("X/Mesa level = %d\n", v->mesa_visual.level);
printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
}
if (b && window) {
/* Do window-specific initializations */
/* these should have been set in create_xmesa_buffer */
ASSERT(b->frontxrb->drawable == window);
ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
/* Setup for single/double buffering */
if (v->mesa_visual.doubleBufferMode) {
/* Double buffered */
b->shm = check_for_xshm( v->display );
}
/* X11 graphics contexts */
b->gc = XCreateGC( v->display, window, 0, NULL );
XMesaSetFunction( v->display, b->gc, GXcopy );
/* cleargc - for glClear() */
b->cleargc = XCreateGC( v->display, window, 0, NULL );
XMesaSetFunction( v->display, b->cleargc, GXcopy );
/*
* Don't generate Graphics Expose/NoExpose events in swapbuffers().
* Patch contributed by Michael Pichler May 15, 1995.
*/
{
XGCValues gcvalues;
gcvalues.graphics_exposures = False;
b->swapgc = XCreateGC(v->display, window,
GCGraphicsExposures, &gcvalues);
}
XMesaSetFunction( v->display, b->swapgc, GXcopy );
}
return GL_TRUE;
}
/*
* Convert an RGBA color to a pixel value.
*/
unsigned long
xmesa_color_to_pixel(struct gl_context *ctx,
GLubyte r, GLubyte g, GLubyte b, GLubyte a,
GLuint pixelFormat)
{
XMesaContext xmesa = XMESA_CONTEXT(ctx);
switch (pixelFormat) {
case PF_Truecolor:
{
unsigned long p;
PACK_TRUECOLOR( p, r, g, b );
return p;
}
case PF_8A8B8G8R:
return PACK_8A8B8G8R( r, g, b, a );
case PF_8A8R8G8B:
return PACK_8A8R8G8B( r, g, b, a );
case PF_8R8G8B:
/* fall through */
case PF_8R8G8B24:
return PACK_8R8G8B( r, g, b );
case PF_5R6G5B:
return PACK_5R6G5B( r, g, b );
case PF_Dither_True:
/* fall through */
case PF_Dither_5R6G5B:
{
unsigned long p;
PACK_TRUEDITHER(p, 1, 0, r, g, b);
return p;
}
default:
_mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
}
return 0;
}
#define NUM_VISUAL_TYPES 6
/**
* Convert an X visual type to a GLX visual type.
*
* \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
* to be converted.
* \return If \c visualType is a valid X visual type, a GLX visual type will
* be returned. Otherwise \c GLX_NONE will be returned.
*
* \note
* This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
* DRI CVS tree.
*/
static GLint
xmesa_convert_from_x_visual_type( int visualType )
{
static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
GLX_STATIC_GRAY, GLX_GRAY_SCALE,
GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
GLX_TRUE_COLOR, GLX_DIRECT_COLOR
};
return ( (unsigned) visualType < NUM_VISUAL_TYPES )
? glx_visual_types[ visualType ] : GLX_NONE;
}
/**********************************************************************/
/***** Public Functions *****/
/**********************************************************************/
/*
* Create a new X/Mesa visual.
* Input: display - X11 display
* visinfo - an XVisualInfo pointer
* rgb_flag - GL_TRUE = RGB mode,
* GL_FALSE = color index mode
* alpha_flag - alpha buffer requested?
* db_flag - GL_TRUE = double-buffered,
* GL_FALSE = single buffered
* stereo_flag - stereo visual?
* ximage_flag - GL_TRUE = use an XImage for back buffer,
* GL_FALSE = use an off-screen pixmap for back buffer
* depth_size - requested bits/depth values, or zero
* stencil_size - requested bits/stencil values, or zero
* accum_red_size - requested bits/red accum values, or zero
* accum_green_size - requested bits/green accum values, or zero
* accum_blue_size - requested bits/blue accum values, or zero
* accum_alpha_size - requested bits/alpha accum values, or zero
* num_samples - number of samples/pixel if multisampling, or zero
* level - visual level, usually 0
* visualCaveat - ala the GLX extension, usually GLX_NONE
* Return; a new XMesaVisual or 0 if error.
*/
PUBLIC
XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
XMesaVisualInfo visinfo,
GLboolean rgb_flag,
GLboolean alpha_flag,
GLboolean db_flag,
GLboolean stereo_flag,
GLboolean ximage_flag,
GLint depth_size,
GLint stencil_size,
GLint accum_red_size,
GLint accum_green_size,
GLint accum_blue_size,
GLint accum_alpha_size,
GLint num_samples,
GLint level,
GLint visualCaveat )
{
char *gamma;
XMesaVisual v;
GLint red_bits, green_bits, blue_bits, alpha_bits;
/* For debugging only */
if (_mesa_getenv("MESA_XSYNC")) {
/* This makes debugging X easier.
* In your debugger, set a breakpoint on _XError to stop when an
* X protocol error is generated.
*/
XSynchronize( display, 1 );
}
/* Color-index rendering not supported. */
if (!rgb_flag)
return NULL;
v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
if (!v) {
return NULL;
}
v->display = display;
/* Save a copy of the XVisualInfo struct because the user may Xfree()
* the struct but we may need some of the information contained in it
* at a later time.
*/
v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
if(!v->visinfo) {
free(v);
return NULL;
}
memcpy(v->visinfo, visinfo, sizeof(*visinfo));
/* check for MESA_GAMMA environment variable */
gamma = _mesa_getenv("MESA_GAMMA");
if (gamma) {
v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
if (v->RedGamma<=0.0) v->RedGamma = 1.0;
if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
}
else {
v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
}
v->ximage_flag = ximage_flag;
v->mesa_visual.redMask = visinfo->red_mask;
v->mesa_visual.greenMask = visinfo->green_mask;
v->mesa_visual.blueMask = visinfo->blue_mask;
v->visualID = visinfo->visualid;
v->screen = visinfo->screen;
#if !(defined(__cplusplus) || defined(c_plusplus))
v->visualType = xmesa_convert_from_x_visual_type(visinfo->class);
#else
v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
#endif
v->mesa_visual.visualRating = visualCaveat;
if (alpha_flag)
v->mesa_visual.alphaBits = 8;
(void) initialize_visual_and_buffer( v, NULL, 0, 0 );
{
const int xclass = v->visualType;
if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
red_bits = _mesa_bitcount(GET_REDMASK(v));
green_bits = _mesa_bitcount(GET_GREENMASK(v));
blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
}
else {
/* this is an approximation */
int depth;
depth = GET_VISUAL_DEPTH(v);
red_bits = depth / 3;
depth -= red_bits;
green_bits = depth / 2;
depth -= green_bits;
blue_bits = depth;
alpha_bits = 0;
assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
}
alpha_bits = v->mesa_visual.alphaBits;
}
if (!_mesa_initialize_visual(&v->mesa_visual,
db_flag, stereo_flag,
red_bits, green_bits,
blue_bits, alpha_bits,
depth_size,
stencil_size,
accum_red_size, accum_green_size,
accum_blue_size, accum_alpha_size,
0)) {
FREE(v);
return NULL;
}
/* XXX minor hack */
v->mesa_visual.level = level;
return v;
}
PUBLIC
void XMesaDestroyVisual( XMesaVisual v )
{
free(v->visinfo);
free(v);
}
/**
* Create a new XMesaContext.
* \param v the XMesaVisual
* \param share_list another XMesaContext with which to share display
* lists or NULL if no sharing is wanted.
* \return an XMesaContext or NULL if error.
*/
PUBLIC
XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
{
static GLboolean firstTime = GL_TRUE;
XMesaContext c;
struct gl_context *mesaCtx;
struct dd_function_table functions;
TNLcontext *tnl;
if (firstTime) {
_glthread_INIT_MUTEX(_xmesa_lock);
firstTime = GL_FALSE;
}
/* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
if (!c)
return NULL;
mesaCtx = &(c->mesa);
/* initialize with default driver functions, then plug in XMesa funcs */
_mesa_init_driver_functions(&functions);
xmesa_init_driver_functions(v, &functions);
if (!_mesa_initialize_context(mesaCtx, API_OPENGL, &v->mesa_visual,
share_list ? &(share_list->mesa) : (struct gl_context *) NULL,
&functions, (void *) c)) {
free(c);
return NULL;
}
/* Enable this to exercise fixed function -> shader translation
* with software rendering.
*/
if (0) {
mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE;
mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
}
_mesa_enable_sw_extensions(mesaCtx);
_mesa_enable_1_3_extensions(mesaCtx);
_mesa_enable_1_4_extensions(mesaCtx);
_mesa_enable_1_5_extensions(mesaCtx);
_mesa_enable_2_0_extensions(mesaCtx);
_mesa_enable_2_1_extensions(mesaCtx);
if (mesaCtx->Mesa_DXTn) {
_mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
_mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
}
_mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
#if ENABLE_EXT_timer_query
_mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
#endif
/* finish up xmesa context initializations */
c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
c->xm_visual = v;
c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
c->display = v->display;
c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
/* Initialize the software rasterizer and helper modules.
*/
if (!_swrast_CreateContext( mesaCtx ) ||
!_vbo_CreateContext( mesaCtx ) ||
!_tnl_CreateContext( mesaCtx ) ||
!_swsetup_CreateContext( mesaCtx )) {
_mesa_free_context_data(&c->mesa);
free(c);
return NULL;
}
/* tnl setup */
tnl = TNL_CONTEXT(mesaCtx);
tnl->Driver.RunPipeline = _tnl_run_pipeline;
/* swrast setup */
xmesa_register_swrast_functions( mesaCtx );
_swsetup_Wakeup(mesaCtx);
_mesa_meta_init(mesaCtx);
return c;
}
PUBLIC
void XMesaDestroyContext( XMesaContext c )
{
struct gl_context *mesaCtx = &c->mesa;
_mesa_meta_free( mesaCtx );
_swsetup_DestroyContext( mesaCtx );
_swrast_DestroyContext( mesaCtx );
_tnl_DestroyContext( mesaCtx );
_vbo_DestroyContext( mesaCtx );
_mesa_free_context_data( mesaCtx );
free( c );
}
/**
* Private function for creating an XMesaBuffer which corresponds to an
* X window or pixmap.
* \param v the window's XMesaVisual
* \param w the window we're wrapping
* \return new XMesaBuffer or NULL if error
*/
PUBLIC XMesaBuffer
XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
{
XWindowAttributes attr;
XMesaBuffer b;
XMesaColormap cmap;
int depth;
assert(v);
assert(w);
/* Check that window depth matches visual depth */
XGetWindowAttributes( v->display, w, &attr );
depth = attr.depth;
if (GET_VISUAL_DEPTH(v) != depth) {
_mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
GET_VISUAL_DEPTH(v), depth);
return NULL;
}
/* Find colormap */
if (attr.colormap) {
cmap = attr.colormap;
}
else {
_mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
/* this is weird, a window w/out a colormap!? */
/* OK, let's just allocate a new one and hope for the best */
cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
}
b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
if (!b)
return NULL;
if (!initialize_visual_and_buffer( v, b, (XMesaDrawable) w, cmap )) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
/**
* Create a new XMesaBuffer from an X pixmap.
*
* \param v the XMesaVisual
* \param p the pixmap
* \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
* \c GLX_DIRECT_COLOR visual for the pixmap
* \returns new XMesaBuffer or NULL if error
*/
PUBLIC XMesaBuffer
XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
{
XMesaBuffer b;
assert(v);
b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
if (!b)
return NULL;
if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
/**
* For GLX_EXT_texture_from_pixmap
*/
XMesaBuffer
XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
XMesaColormap cmap,
int format, int target, int mipmap)
{
GET_CURRENT_CONTEXT(ctx);
XMesaBuffer b;
GLuint width, height;
assert(v);
b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
if (!b)
return NULL;
/* get pixmap size, update framebuffer/renderbuffer dims */
xmesa_get_window_size(v->display, b, &width, &height);
_mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
if (target == 0) {
/* examine dims */
if (ctx->Extensions.ARB_texture_non_power_of_two) {
target = GLX_TEXTURE_2D_EXT;
}
else if ( _mesa_bitcount(width) == 1
&& _mesa_bitcount(height) == 1) {
/* power of two size */
if (height == 1) {
target = GLX_TEXTURE_1D_EXT;
}
else {
target = GLX_TEXTURE_2D_EXT;
}
}
else if (ctx->Extensions.NV_texture_rectangle) {
target = GLX_TEXTURE_RECTANGLE_EXT;
}
else {
/* non power of two textures not supported */
XMesaDestroyBuffer(b);
return 0;
}
}
b->TextureTarget = target;
b->TextureFormat = format;
b->TextureMipmap = mipmap;
if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
XMesaBuffer
XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
unsigned int width, unsigned int height)
{
XMesaWindow root;
XMesaDrawable drawable; /* X Pixmap Drawable */
XMesaBuffer b;
/* allocate pixmap for front buffer */
root = RootWindow( v->display, v->visinfo->screen );
drawable = XCreatePixmap(v->display, root, width, height,
v->visinfo->depth);
if (!drawable)
return NULL;
b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
if (!b)
return NULL;
if (!initialize_visual_and_buffer(v, b, drawable, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
/*
* Deallocate an XMesaBuffer structure and all related info.
*/
PUBLIC void
XMesaDestroyBuffer(XMesaBuffer b)
{
xmesa_free_buffer(b);
}
/**
* Query the current window size and update the corresponding struct gl_framebuffer
* and all attached renderbuffers.
* Called when:
* 1. the first time a buffer is bound to a context.
* 2. from glViewport to poll for window size changes
* 3. from the XMesaResizeBuffers() API function.
* Note: it's possible (and legal) for xmctx to be NULL. That can happen
* when resizing a buffer when no rendering context is bound.
*/
void
xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
{
GLuint width, height;
xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
if (drawBuffer->mesa_buffer.Width != width ||
drawBuffer->mesa_buffer.Height != height) {
struct gl_context *ctx = xmctx ? &xmctx->mesa : NULL;
_mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
}
drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
}
/*
* Bind buffer b to context c and make c the current rendering context.
*/
GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
{
return XMesaMakeCurrent2( c, b, b );
}
/*
* Bind buffer b to context c and make c the current rendering context.
*/
PUBLIC
GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
XMesaBuffer readBuffer )
{
if (c) {
if (!drawBuffer || !readBuffer)
return GL_FALSE; /* must specify buffers! */
if (&(c->mesa) == _mesa_get_current_context()
&& c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
&& c->mesa.ReadBuffer == &readBuffer->mesa_buffer
&& XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
/* same context and buffer, do nothing */
return GL_TRUE;
}
c->xm_buffer = drawBuffer;
/* Call this periodically to detect when the user has begun using
* GL rendering from multiple threads.
*/
_glapi_check_multithread();
xmesa_check_and_update_buffer_size(c, drawBuffer);
if (readBuffer != drawBuffer)
xmesa_check_and_update_buffer_size(c, readBuffer);
_mesa_make_current(&(c->mesa),
&drawBuffer->mesa_buffer,
&readBuffer->mesa_buffer);
/*
* Must recompute and set these pixel values because colormap
* can be different for different windows.
*/
c->clearpixel = xmesa_color_to_pixel( &c->mesa,
c->clearcolor[0],
c->clearcolor[1],
c->clearcolor[2],
c->clearcolor[3],
c->xm_visual->undithered_pf);
XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
/* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
drawBuffer->wasCurrent = GL_TRUE;
}
else {
/* Detach */
_mesa_make_current( NULL, NULL, NULL );
}
return GL_TRUE;
}
/*
* Unbind the context c from its buffer.
*/
GLboolean XMesaUnbindContext( XMesaContext c )
{
/* A no-op for XFree86 integration purposes */
return GL_TRUE;
}
XMesaContext XMesaGetCurrentContext( void )
{
GET_CURRENT_CONTEXT(ctx);
if (ctx) {
XMesaContext xmesa = XMESA_CONTEXT(ctx);
return xmesa;
}
else {
return 0;
}
}
XMesaBuffer XMesaGetCurrentBuffer( void )
{
GET_CURRENT_CONTEXT(ctx);
if (ctx) {
XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
return xmbuf;
}
else {
return 0;
}
}
/* New in Mesa 3.1 */
XMesaBuffer XMesaGetCurrentReadBuffer( void )
{
GET_CURRENT_CONTEXT(ctx);
if (ctx) {
return XMESA_BUFFER(ctx->ReadBuffer);
}
else {
return 0;
}
}
GLboolean XMesaSetFXmode( GLint mode )
{
(void) mode;
return GL_FALSE;
}
/*
* Copy the back buffer to the front buffer. If there's no back buffer
* this is a no-op.
*/
PUBLIC
void XMesaSwapBuffers( XMesaBuffer b )
{
GET_CURRENT_CONTEXT(ctx);
if (!b->backxrb) {
/* single buffered */
return;
}
/* If we're swapping the buffer associated with the current context
* we have to flush any pending rendering commands first.
*/
if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
_mesa_notifySwapBuffers(ctx);
if (b->db_mode) {
if (b->backxrb->ximage) {
/* Copy Ximage (back buf) from client memory to server window */
#if defined(USE_XSHM)
if (b->shm) {
/*_glthread_LOCK_MUTEX(_xmesa_lock);*/
XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
b->swapgc,
b->backxrb->ximage, 0, 0,
0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
False );
/*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
}
else
#endif
{
/*_glthread_LOCK_MUTEX(_xmesa_lock);*/
XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
b->swapgc,
b->backxrb->ximage, 0, 0,
0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
/*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
}
}
else if (b->backxrb->pixmap) {
/* Copy pixmap (back buf) to window (front buf) on server */
/*_glthread_LOCK_MUTEX(_xmesa_lock);*/
XMesaCopyArea( b->xm_visual->display,
b->backxrb->pixmap, /* source drawable */
b->frontxrb->drawable, /* dest. drawable */
b->swapgc,
0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
0, 0 /* dest region */
);
/*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
}
}
XSync( b->xm_visual->display, False );
}
/*
* Copy sub-region of back buffer to front buffer
*/
void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
{
GET_CURRENT_CONTEXT(ctx);
/* If we're swapping the buffer associated with the current context
* we have to flush any pending rendering commands first.
*/
if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
_mesa_notifySwapBuffers(ctx);
if (!b->backxrb) {
/* single buffered */
return;
}
if (b->db_mode) {
int yTop = b->mesa_buffer.Height - y - height;
if (b->backxrb->ximage) {
/* Copy Ximage from host's memory to server's window */
#if defined(USE_XSHM)
if (b->shm) {
/* XXX assuming width and height aren't too large! */
XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
b->swapgc,
b->backxrb->ximage, x, yTop,
x, yTop, width, height, False );
/* wait for finished event??? */
}
else
#endif
{
/* XXX assuming width and height aren't too large! */
XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
b->swapgc,
b->backxrb->ximage, x, yTop,
x, yTop, width, height );
}
}
else {
/* Copy pixmap to window on server */
XMesaCopyArea( b->xm_visual->display,
b->backxrb->pixmap, /* source drawable */
b->frontxrb->drawable, /* dest. drawable */
b->swapgc,
x, yTop, width, height, /* source region */
x, yTop /* dest region */
);
}
}
}
/*
* Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
* is a way to get "under the hood" of X/Mesa so one can manipulate the
* back buffer directly.
* Output: pixmap - pointer to back buffer's Pixmap, or 0
* ximage - pointer to back buffer's XImage, or NULL
* Return: GL_TRUE = context is double buffered
* GL_FALSE = context is single buffered
*/
GLboolean XMesaGetBackBuffer( XMesaBuffer b,
XMesaPixmap *pixmap,
XMesaImage **ximage )
{
if (b->db_mode) {
if (pixmap)
*pixmap = b->backxrb->pixmap;
if (ximage)
*ximage = b->backxrb->ximage;
return GL_TRUE;
}
else {
*pixmap = 0;
*ximage = NULL;
return GL_FALSE;
}
}
/*
* Return the depth buffer associated with an XMesaBuffer.
* Input: b - the XMesa buffer handle
* Output: width, height - size of buffer in pixels
* bytesPerValue - bytes per depth value (2 or 4)
* buffer - pointer to depth buffer values
* Return: GL_TRUE or GL_FALSE to indicate success or failure.
*/
GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
GLint *bytesPerValue, void **buffer )
{
struct gl_renderbuffer *rb
= b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
if (!xrb || !xrb->Base.Buffer) {
*width = 0;
*height = 0;
*bytesPerValue = 0;
*buffer = 0;
return GL_FALSE;
}
else {
*width = b->mesa_buffer.Width;
*height = b->mesa_buffer.Height;
*bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
? sizeof(GLushort) : sizeof(GLuint);
*buffer = (void *) xrb->Base.Buffer;
return GL_TRUE;
}
}
void XMesaFlush( XMesaContext c )
{
if (c && c->xm_visual) {
XSync( c->xm_visual->display, False );
}
}
const char *XMesaGetString( XMesaContext c, int name )
{
(void) c;
if (name==XMESA_VERSION) {
return "5.0";
}
else if (name==XMESA_EXTENSIONS) {
return "";
}
else {
return NULL;
}
}
XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
{
XMesaBuffer b;
for (b=XMesaBufferList; b; b=b->Next) {
if (b->frontxrb->drawable == d && b->display == dpy) {
return b;
}
}
return NULL;
}
/**
* Free/destroy all XMesaBuffers associated with given display.
*/
void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
{
XMesaBuffer b, next;
for (b = XMesaBufferList; b; b = next) {
next = b->Next;
if (b->display == dpy) {
xmesa_free_buffer(b);
}
}
}
/*
* Look for XMesaBuffers whose X window has been destroyed.
* Deallocate any such XMesaBuffers.
*/
void XMesaGarbageCollect( XMesaDisplay* dpy )
{
XMesaBuffer b, next;
for (b=XMesaBufferList; b; b=next) {
next = b->Next;
if (b->display && b->display == dpy && b->frontxrb->drawable && b->type == WINDOW) {
XSync(b->display, False);
if (!window_exists( b->display, b->frontxrb->drawable )) {
/* found a dead window, free the ancillary info */
XMesaDestroyBuffer( b );
}
}
}
}
unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
GLfloat red, GLfloat green,
GLfloat blue, GLfloat alpha )
{
GLint r = (GLint) (red * 255.0F);
GLint g = (GLint) (green * 255.0F);
GLint b = (GLint) (blue * 255.0F);
GLint a = (GLint) (alpha * 255.0F);
switch (xmesa->pixelformat) {
case PF_Truecolor:
{
unsigned long p;
PACK_TRUECOLOR( p, r, g, b );
return p;
}
case PF_8A8B8G8R:
return PACK_8A8B8G8R( r, g, b, a );
case PF_8A8R8G8B:
return PACK_8A8R8G8B( r, g, b, a );
case PF_8R8G8B:
return PACK_8R8G8B( r, g, b );
case PF_5R6G5B:
return PACK_5R6G5B( r, g, b );
case PF_Dither_5R6G5B:
/* fall through */
case PF_Dither_True:
{
unsigned long p;
PACK_TRUEDITHER(p, x, y, r, g, b);
return p;
}
default:
_mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
}
return 0;
}
/*
* This is typically called when the window size changes and we need
* to reallocate the buffer's back/depth/stencil/accum buffers.
*/
PUBLIC void
XMesaResizeBuffers( XMesaBuffer b )
{
GET_CURRENT_CONTEXT(ctx);
XMesaContext xmctx = XMESA_CONTEXT(ctx);
if (!xmctx)
return;
xmesa_check_and_update_buffer_size(xmctx, b);
}
static GLint
xbuffer_to_renderbuffer(int buffer)
{
assert(MAX_AUX_BUFFERS <= 4);
switch (buffer) {
case GLX_FRONT_LEFT_EXT:
return BUFFER_FRONT_LEFT;
case GLX_FRONT_RIGHT_EXT:
return BUFFER_FRONT_RIGHT;
case GLX_BACK_LEFT_EXT:
return BUFFER_BACK_LEFT;
case GLX_BACK_RIGHT_EXT:
return BUFFER_BACK_RIGHT;
case GLX_AUX0_EXT:
return BUFFER_AUX0;
case GLX_AUX1_EXT:
case GLX_AUX2_EXT:
case GLX_AUX3_EXT:
case GLX_AUX4_EXT:
case GLX_AUX5_EXT:
case GLX_AUX6_EXT:
case GLX_AUX7_EXT:
case GLX_AUX8_EXT:
case GLX_AUX9_EXT:
default:
/* BadValue error */
return -1;
}
}
PUBLIC void
XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
const int *attrib_list)
{
#if 0
GET_CURRENT_CONTEXT(ctx);
const GLuint unit = ctx->Texture.CurrentUnit;
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *texObj;
#endif
struct gl_renderbuffer *rb;
struct xmesa_renderbuffer *xrb;
GLint b;
XMesaImage *img = NULL;
GLboolean freeImg = GL_FALSE;
b = xbuffer_to_renderbuffer(buffer);
if (b < 0)
return;
if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
return; /* BadMatch error */
rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
if (!rb) {
/* invalid buffer */
return;
}
xrb = xmesa_renderbuffer(rb);
#if 0
switch (drawable->TextureTarget) {
case GLX_TEXTURE_1D_EXT:
texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
break;
case GLX_TEXTURE_2D_EXT:
texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
break;
case GLX_TEXTURE_RECTANGLE_EXT:
texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
break;
default:
return; /* BadMatch error */
}
#endif
/*
* The following is a quick and simple way to implement
* BindTexImage. The better way is to write some new FetchTexel()
* functions which would extract texels from XImages. We'd still
* need to use GetImage when texturing from a Pixmap (front buffer)
* but texturing from a back buffer (XImage) would avoid an image
* copy.
*/
/* get XImage */
if (xrb->pixmap) {
img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
ZPixmap);
freeImg = GL_TRUE;
}
else if (xrb->ximage) {
img = xrb->ximage;
}
/* store the XImage as a new texture image */
if (img) {
GLenum format, type, intFormat;
if (img->bits_per_pixel == 32) {
format = GL_BGRA;
type = GL_UNSIGNED_BYTE;
intFormat = GL_RGBA;
}
else if (img->bits_per_pixel == 24) {
format = GL_BGR;
type = GL_UNSIGNED_BYTE;
intFormat = GL_RGB;
}
else if (img->bits_per_pixel == 16) {
format = GL_BGR;
type = GL_UNSIGNED_SHORT_5_6_5;
intFormat = GL_RGB;
}
else {
_mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
return;
}
if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
intFormat = GL_RGBA;
}
else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
intFormat = GL_RGB;
}
_mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
format, type, img->data);
if (freeImg) {
XMesaDestroyImage(img);
}
}
}
PUBLIC void
XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
{
const GLint b = xbuffer_to_renderbuffer(buffer);
if (b < 0)
return;
/* no-op for now */
}