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/**************************************************************************
*
* 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_bitmap.h"
#include "tgsi/tgsi_transform.h"
#include "tgsi/tgsi_scan.h"
#include "tgsi/tgsi_dump.h"
#include "util/u_debug.h"
struct tgsi_bitmap_transform {
struct tgsi_transform_context base;
struct tgsi_shader_info info;
unsigned sampler_index;
unsigned tex_target;
bool use_texcoord;
bool swizzle_xxxx;
bool first_instruction_emitted;
};
static inline struct tgsi_bitmap_transform *
tgsi_bitmap_transform(struct tgsi_transform_context *tctx)
{
return (struct tgsi_bitmap_transform *)tctx;
}
static void
transform_instr(struct tgsi_transform_context *tctx,
struct tgsi_full_instruction *current_inst)
{
struct tgsi_bitmap_transform *ctx = tgsi_bitmap_transform(tctx);
struct tgsi_full_instruction inst;
unsigned tgsi_tex_target = ctx->tex_target == PIPE_TEXTURE_2D
? TGSI_TEXTURE_2D : TGSI_TEXTURE_RECT;
unsigned i, semantic;
int texcoord_index = -1;
if (ctx->first_instruction_emitted) {
tctx->emit_instruction(tctx, current_inst);
return;
}
ctx->first_instruction_emitted = true;
/* Add TEMP[0] if it's missing. */
if (ctx->info.file_max[TGSI_FILE_TEMPORARY] == -1) {
tgsi_transform_temp_decl(tctx, 0);
}
/* Add TEXCOORD[0] if it's missing. */
semantic = ctx->use_texcoord ? TGSI_SEMANTIC_TEXCOORD :
TGSI_SEMANTIC_GENERIC;
for (i = 0; i < ctx->info.num_inputs; i++) {
if (ctx->info.input_semantic_name[i] == semantic &&
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,
semantic, 0, TGSI_INTERPOLATE_PERSPECTIVE);
}
/* Declare the sampler. */
tgsi_transform_sampler_decl(tctx, ctx->sampler_index);
/* Declare the sampler view. */
tgsi_transform_sampler_view_decl(tctx, ctx->sampler_index,
tgsi_tex_target, TGSI_RETURN_TYPE_FLOAT);
/* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
tgsi_transform_tex_inst(tctx,
TGSI_FILE_TEMPORARY, 0,
TGSI_FILE_INPUT, texcoord_index,
tgsi_tex_target, ctx->sampler_index);
/* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_KILL_IF;
inst.Instruction.NumDstRegs = 0;
inst.Instruction.NumSrcRegs = 1;
inst.Src[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Src[0].Register.Index = 0;
inst.Src[0].Register.Negate = 1;
inst.Src[0].Register.SwizzleX = TGSI_SWIZZLE_X;
if (ctx->swizzle_xxxx) {
inst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_X;
inst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_X;
inst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_X;
} else {
inst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_Y;
inst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_Z;
inst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_W;
}
tctx->emit_instruction(tctx, &inst);
/* And emit the instruction we got. */
tctx->emit_instruction(tctx, current_inst);
}
const struct tgsi_token *
st_get_bitmap_shader(const struct tgsi_token *tokens,
unsigned tex_target, unsigned sampler_index,
bool use_texcoord, bool swizzle_xxxx)
{
struct tgsi_bitmap_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.tex_target = tex_target;
ctx.sampler_index = sampler_index;
ctx.use_texcoord = use_texcoord;
ctx.swizzle_xxxx = swizzle_xxxx;
tgsi_scan_shader(tokens, &ctx.info);
newlen = tgsi_num_tokens(tokens) + 20;
newtoks = tgsi_alloc_tokens(newlen);
if (!newtoks)
return NULL;
tgsi_transform_shader(tokens, newtoks, newlen, &ctx.base);
return newtoks;
}
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