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st/mesa: implement DrawPixels shader transformation using tgsi_transform_shader

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Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Tested-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák
2015-10-04 02:38:55 +02:00
parent b55b986dc9
commit f15bb3e633
10 changed files with 303 additions and 504 deletions
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118
src/mesa/state_tracker/st_cb_drawpixels.c
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@@ -71,119 +71,6 @@
#include "cso_cache/cso_context.h"
/**
* Check if the given program is:
* 0: MOVE result.color, fragment.color;
* 1: END;
*/
static GLboolean
is_passthrough_program(const struct gl_fragment_program *prog)
{
if (prog->Base.NumInstructions == 2) {
const struct prog_instruction *inst = prog->Base.Instructions;
if (inst[0].Opcode == OPCODE_MOV &&
inst[1].Opcode == OPCODE_END &&
inst[0].DstReg.File == PROGRAM_OUTPUT &&
inst[0].DstReg.Index == FRAG_RESULT_COLOR &&
inst[0].DstReg.WriteMask == WRITEMASK_XYZW &&
inst[0].SrcReg[0].File == PROGRAM_INPUT &&
inst[0].SrcReg[0].Index == VARYING_SLOT_COL0 &&
inst[0].SrcReg[0].Swizzle == SWIZZLE_XYZW) {
return GL_TRUE;
}
}
return GL_FALSE;
}
/**
* Returns a fragment program which implements the current pixel transfer ops.
*/
static struct gl_fragment_program *
get_glsl_pixel_transfer_program(struct st_context *st,
struct st_fragment_program *orig)
{
int pixelMaps = 0, scaleAndBias = 0;
struct gl_context *ctx = st->ctx;
struct st_fragment_program *fp = (struct st_fragment_program *)
ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
if (!fp)
return NULL;
if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
scaleAndBias = 1;
}
pixelMaps = ctx->Pixel.MapColorFlag;
if (pixelMaps) {
/* create the colormap/texture now if not already done */
if (!st->pixel_xfer.pixelmap_texture) {
st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx);
st->pixel_xfer.pixelmap_sampler_view =
st_create_texture_sampler_view(st->pipe,
st->pixel_xfer.pixelmap_texture);
}
}
get_pixel_transfer_visitor(fp, orig->glsl_to_tgsi,
scaleAndBias, pixelMaps);
return &fp->Base;
}
/**
* Make fragment shader for glDraw/CopyPixels. This shader is made
* by combining the pixel transfer shader with the user-defined shader.
* \param fpIn the current/incoming fragment program
* \param fpOut returns the combined fragment program
*/
void
st_make_drawpix_fragment_program(struct st_context *st,
struct gl_fragment_program *fpIn,
struct gl_fragment_program **fpOut)
{
struct gl_program *newProg;
struct st_fragment_program *stfp = (struct st_fragment_program *) fpIn;
if (is_passthrough_program(fpIn)) {
newProg = (struct gl_program *) _mesa_clone_fragment_program(st->ctx,
&st->pixel_xfer.program->Base);
}
else if (stfp->glsl_to_tgsi != NULL) {
newProg = (struct gl_program *) get_glsl_pixel_transfer_program(st, stfp);
}
else {
#if 0
/* debug */
printf("Base program:\n");
_mesa_print_program(&fpIn->Base);
printf("DrawPix program:\n");
_mesa_print_program(&st->pixel_xfer.program->Base.Base);
#endif
newProg = _mesa_combine_programs(st->ctx,
&st->pixel_xfer.program->Base.Base,
&fpIn->Base);
}
#if 0
/* debug */
printf("Combined DrawPixels program:\n");
_mesa_print_program(newProg);
printf("InputsRead: 0x%x\n", newProg->InputsRead);
printf("OutputsWritten: 0x%x\n", newProg->OutputsWritten);
_mesa_print_parameter_list(newProg->Parameters);
#endif
*fpOut = (struct gl_fragment_program *) newProg;
}
/**
* Create fragment program that does a TEX() instruction to get a Z and/or
* stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
@@ -1101,7 +988,7 @@ st_DrawPixels(struct gl_context *ctx, GLint x, GLint y,
driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
color = NULL;
if (st->pixel_xfer.pixelmap_enabled) {
if (ctx->Pixel.MapColorFlag) {
pipe_sampler_view_reference(&sv[1],
st->pixel_xfer.pixelmap_sampler_view);
num_sampler_view++;
@@ -1439,7 +1326,7 @@ st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy,
driver_fp = fpv->driver_shader;
driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
if (st->pixel_xfer.pixelmap_enabled) {
if (ctx->Pixel.MapColorFlag) {
pipe_sampler_view_reference(&sv[1],
st->pixel_xfer.pixelmap_sampler_view);
num_sampler_view++;
@@ -1610,7 +1497,6 @@ st_destroy_drawpix(struct st_context *st)
st->drawpix.zs_shaders[i]);
}
st_reference_fragprog(st, &st->pixel_xfer.combined_prog, NULL);
if (st->drawpix.vert_shaders[0])
cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[0]);
if (st->drawpix.vert_shaders[1])