/**************************************************************************
*
* Copyright (C) 2015 Advanced Micro Devices, Inc.
* Copyright 2007 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
#include "st_cb_drawpixels.h"
#include "tgsi/tgsi_transform.h"
#include "tgsi/tgsi_scan.h"
struct tgsi_drawpix_transform {
struct tgsi_transform_context base;
struct tgsi_shader_info info;
bool use_texcoord;
bool scale_and_bias;
bool pixel_maps;
bool first_instruction_emitted;
unsigned scale_const;
unsigned bias_const;
unsigned color_temp;
unsigned drawpix_sampler;
unsigned pixelmap_sampler;
unsigned texcoord_const;
unsigned tex_target;
};
static inline struct tgsi_drawpix_transform *
tgsi_drawpix_transform(struct tgsi_transform_context *tctx)
{
return (struct tgsi_drawpix_transform *)tctx;
}
static void
set_src(struct tgsi_full_instruction *inst, unsigned i, unsigned file, unsigned index,
unsigned x, unsigned y, unsigned z, unsigned w)
{
inst->Src[i].Register.File = file;
inst->Src[i].Register.Index = index;
inst->Src[i].Register.SwizzleX = x;
inst->Src[i].Register.SwizzleY = y;
inst->Src[i].Register.SwizzleZ = z;
inst->Src[i].Register.SwizzleW = w;
}
#define SET_SRC(inst, i, file, index, x, y, z, w) \
set_src(inst, i, file, index, TGSI_SWIZZLE_##x, TGSI_SWIZZLE_##y, \
TGSI_SWIZZLE_##z, TGSI_SWIZZLE_##w)
static void
transform_instr(struct tgsi_transform_context *tctx,
struct tgsi_full_instruction *current_inst)
{
struct tgsi_drawpix_transform *ctx = tgsi_drawpix_transform(tctx);
const unsigned tgsi_tex_target = ctx->tex_target == PIPE_TEXTURE_2D
? TGSI_TEXTURE_2D : TGSI_TEXTURE_RECT;
unsigned i, sem_texcoord = ctx->use_texcoord ? TGSI_SEMANTIC_TEXCOORD :
TGSI_SEMANTIC_GENERIC;
int texcoord_index = -1;
if (ctx->first_instruction_emitted)
goto transform_inst;
ctx->first_instruction_emitted = true;
/* Add scale and bias constants. */
if (ctx->scale_and_bias) {
if (ctx->info.const_file_max[0] < (int)ctx->scale_const) {
tgsi_transform_const_decl(tctx, ctx->scale_const, ctx->scale_const);
}
if (ctx->info.const_file_max[0] < (int)ctx->bias_const) {
tgsi_transform_const_decl(tctx, ctx->bias_const, ctx->bias_const);
}
}
if (ctx->info.const_file_max[0] < (int)ctx->texcoord_const) {
tgsi_transform_const_decl(tctx, ctx->texcoord_const, ctx->texcoord_const);
}
/* Add a new temp. */
ctx->color_temp = ctx->info.file_max[TGSI_FILE_TEMPORARY] + 1;
tgsi_transform_temp_decl(tctx, ctx->color_temp);
/* Add TEXCOORD[texcoord_slot] if it's missing. */
for (i = 0; i < ctx->info.num_inputs; i++) {
if (ctx->info.input_semantic_name[i] == sem_texcoord &&
ctx->info.input_semantic_index[i] == 0) {
texcoord_index = i;
break;
}
}
if (texcoord_index == -1) {
texcoord_index = ctx->info.num_inputs;
tgsi_transform_input_decl(tctx, texcoord_index, sem_texcoord, 0,
TGSI_INTERPOLATE_PERSPECTIVE);
}
/* Declare the drawpix sampler if it's missing. */
if (!(ctx->info.samplers_declared & (1 << ctx->drawpix_sampler))) {
tgsi_transform_sampler_decl(tctx, ctx->drawpix_sampler);
/* emit sampler view declaration */
tgsi_transform_sampler_view_decl(tctx, ctx->drawpix_sampler,
tgsi_tex_target, TGSI_RETURN_TYPE_FLOAT);
}
/* Declare the pixel map sampler if it's missing. */
if (ctx->pixel_maps &&
!(ctx->info.samplers_declared & (1 << ctx->pixelmap_sampler))) {
tgsi_transform_sampler_decl(tctx, ctx->pixelmap_sampler);
/* emit sampler view declaration */
tgsi_transform_sampler_view_decl(tctx, ctx->pixelmap_sampler,
TGSI_TEXTURE_2D, TGSI_RETURN_TYPE_FLOAT);
}
/* Get initial pixel color from the texture.
* TEX temp, fragment.texcoord[0], texture[0], 2D;
*/
tgsi_transform_tex_inst(tctx, TGSI_FILE_TEMPORARY, ctx->color_temp,
TGSI_FILE_INPUT, texcoord_index,
tgsi_tex_target, ctx->drawpix_sampler);
/* Apply the scale and bias. */
if (ctx->scale_and_bias) {
/* MAD temp, temp, scale, bias; */
tgsi_transform_op3_inst(tctx, TGSI_OPCODE_MAD,
TGSI_FILE_TEMPORARY, ctx->color_temp,
TGSI_WRITEMASK_XYZW,
TGSI_FILE_TEMPORARY, ctx->color_temp,
TGSI_FILE_CONSTANT, ctx->scale_const,
TGSI_FILE_CONSTANT, ctx->bias_const);
}
if (ctx->pixel_maps) {
/* do four pixel map look-ups with two TEX instructions: */
struct tgsi_full_instruction inst;
/* TEX temp.xy, temp.xyyy, texture[1], 2D; */
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_TEX;
inst.Instruction.Texture = 1;
inst.Texture.Texture = TGSI_TEXTURE_2D;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->color_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XY;
inst.Instruction.NumSrcRegs = 2;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->color_temp, X, Y, Y, Y);
inst.Src[1].Register.File = TGSI_FILE_SAMPLER;
inst.Src[1].Register.Index = ctx->pixelmap_sampler;
tctx->emit_instruction(tctx, &inst);
/* TEX temp.zw, temp.zwww, texture[1], 2D; */
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_ZW;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->color_temp, Z, W, W, W);
tctx->emit_instruction(tctx, &inst);
}
/* Now, "color_temp" should be used in place of IN:COLOR0,
* and CONST[texcoord_slot] should be used in place of IN:TEXCOORD0.
*/
transform_inst:
for (i = 0; i < current_inst->Instruction.NumSrcRegs; i++) {
struct tgsi_full_src_register *src = ¤t_inst->Src[i];
unsigned reg = src->Register.Index;
if (src->Register.File != TGSI_FILE_INPUT || src->Register.Indirect)
continue;
if (ctx->info.input_semantic_name[reg] == TGSI_SEMANTIC_COLOR &&
ctx->info.input_semantic_index[reg] == 0) {
src->Register.File = TGSI_FILE_TEMPORARY;
src->Register.Index = ctx->color_temp;
} else if (ctx->info.input_semantic_name[reg] == sem_texcoord &&
ctx->info.input_semantic_index[reg] == 0) {
src->Register.File = TGSI_FILE_CONSTANT;
src->Register.Index = ctx->texcoord_const;
src->Register.Dimension = 1;
src->Dimension.Index = 0;
}
}
tctx->emit_instruction(tctx, current_inst);
}
const struct tgsi_token *
st_get_drawpix_shader(const struct tgsi_token *tokens, bool use_texcoord,
bool scale_and_bias, unsigned scale_const,
unsigned bias_const, bool pixel_maps,
unsigned drawpix_sampler, unsigned pixelmap_sampler,
unsigned texcoord_const, unsigned tex_target)
{
struct tgsi_drawpix_transform ctx;
struct tgsi_token *newtoks;
int newlen;
assert(tex_target == PIPE_TEXTURE_2D ||
tex_target == PIPE_TEXTURE_RECT);
memset(&ctx, 0, sizeof(ctx));
ctx.base.transform_instruction = transform_instr;
ctx.use_texcoord = use_texcoord;
ctx.scale_and_bias = scale_and_bias;
ctx.scale_const = scale_const;
ctx.bias_const = bias_const;
ctx.pixel_maps = pixel_maps;
ctx.drawpix_sampler = drawpix_sampler;
ctx.pixelmap_sampler = pixelmap_sampler;
ctx.texcoord_const = texcoord_const;
ctx.tex_target = tex_target;
tgsi_scan_shader(tokens, &ctx.info);
newlen = tgsi_num_tokens(tokens) + 60;
newtoks = tgsi_alloc_tokens(newlen);
if (!newtoks)
return NULL;
tgsi_transform_shader(tokens, newtoks, newlen, &ctx.base);
return newtoks;
}