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st/mesa: Add a NIR version of the drawpixels/bitmap VS copy shader.

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This provides a native NIR version of the DrawPixels/Bitmap passthrough
vertex shader.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Rob Clark <robdclark@gmail.com>
Tested-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke
2018-11-03 23:46:29 -07:00
parent cdc53fa81c
commit 2d45f9fa25
1 changed files with 29 additions and 8 deletions
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37
src/mesa/state_tracker/st_cb_drawpixels.c
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@@ -65,6 +65,7 @@
#include "st_sampler_view.h"
#include "st_scissor.h"
#include "st_texture.h"
#include "st_nir.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
@@ -76,6 +77,7 @@
#include "util/u_tile.h"
#include "cso_cache/cso_context.h"
#include "compiler/nir/nir_builder.h"
/**
* We have a simple glDrawPixels cache to try to optimize the case where the
@@ -197,18 +199,37 @@ get_drawpix_z_stencil_program(struct st_context *st,
void
st_make_passthrough_vertex_shader(struct st_context *st)
{
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
if (st->passthrough_vs)
return;
const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
TGSI_SEMANTIC_COLOR,
st->needs_texcoord_semantic ? TGSI_SEMANTIC_TEXCOORD :
TGSI_SEMANTIC_GENERIC };
const uint semantic_indexes[] = { 0, 0, 0 };
enum pipe_shader_ir preferred_ir =
screen->get_shader_param(screen, MESA_SHADER_VERTEX,
PIPE_SHADER_CAP_PREFERRED_IR);
st->passthrough_vs =
util_make_vertex_passthrough_shader(st->pipe, 3, semantic_names,
semantic_indexes, false);
if (preferred_ir == PIPE_SHADER_IR_NIR) {
unsigned inputs[] =
{ VERT_ATTRIB_POS, VERT_ATTRIB_COLOR0, VERT_ATTRIB_GENERIC0 };
unsigned outputs[] =
{ VARYING_SLOT_POS, VARYING_SLOT_COL0, VARYING_SLOT_TEX0 };
st->passthrough_vs =
st_nir_make_passthrough_shader(st, "drawpixels VS",
MESA_SHADER_VERTEX, 3,
inputs, outputs, NULL, 0);
} else {
const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
TGSI_SEMANTIC_COLOR,
st->needs_texcoord_semantic ? TGSI_SEMANTIC_TEXCOORD :
TGSI_SEMANTIC_GENERIC };
const uint semantic_indexes[] = { 0, 0, 0 };
st->passthrough_vs =
util_make_vertex_passthrough_shader(st->pipe, 3, semantic_names,
semantic_indexes, false);
}
}