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-rw-r--r--src/gallium/drivers/svga/svga_context.c1
-rw-r--r--src/gallium/drivers/svga/svga_context.h4
-rw-r--r--src/gallium/drivers/svga/svga_state_fs.c126
-rw-r--r--src/gallium/drivers/svga/svga_tgsi.h1
-rw-r--r--src/gallium/drivers/svga/svga_tgsi_decl_sm30.c15
-rw-r--r--src/gallium/drivers/svga/svga_tgsi_insn.c34
6 files changed, 75 insertions, 106 deletions
diff --git a/src/gallium/drivers/svga/svga_context.c b/src/gallium/drivers/svga/svga_context.c
index af99c9de37c..1e76592ec60 100644
--- a/src/gallium/drivers/svga/svga_context.c
+++ b/src/gallium/drivers/svga/svga_context.c
@@ -215,7 +215,6 @@ struct pipe_context *svga_context_create( struct pipe_screen *screen )
svga->state.hw_draw.num_views = 0;
svga->dirty = ~0;
- svga->state.white_fs_id = SVGA3D_INVALID_ID;
LIST_INITHEAD(&svga->dirty_buffers);
diff --git a/src/gallium/drivers/svga/svga_context.h b/src/gallium/drivers/svga/svga_context.h
index 66259fd0103..ba86256eb26 100644
--- a/src/gallium/drivers/svga/svga_context.h
+++ b/src/gallium/drivers/svga/svga_context.h
@@ -327,10 +327,6 @@ struct svga_context
unsigned texture_timestamp;
- /* Internally generated shaders:
- */
- unsigned white_fs_id;
-
/*
*/
struct svga_sw_state sw;
diff --git a/src/gallium/drivers/svga/svga_state_fs.c b/src/gallium/drivers/svga/svga_state_fs.c
index ec2886348b9..68228c8461d 100644
--- a/src/gallium/drivers/svga/svga_state_fs.c
+++ b/src/gallium/drivers/svga/svga_state_fs.c
@@ -108,70 +108,6 @@ fail:
return ret;
}
-/* The blend workaround for simulating logicop xor behaviour requires
- * that the incoming fragment color be white. This change achieves
- * that by hooking up a hard-wired fragment shader that just emits
- * color 1,1,1,1
- *
- * This is a slightly incomplete solution as it assumes that the
- * actual bound shader has no other effects beyond generating a
- * fragment color. In particular shaders containing TEXKIL and/or
- * depth-write will not have the correct behaviour, nor will those
- * expecting to use alphatest.
- *
- * These are avoidable issues, but they are not much worse than the
- * unavoidable ones associated with this technique, so it's not clear
- * how much effort should be expended trying to resolve them - the
- * ultimate result will still not be correct in most cases.
- *
- * Shader below was generated with:
- * SVGA_DEBUG=tgsi ./mesa/progs/fp/fp-tri white.txt
- */
-static int emit_white_fs( struct svga_context *svga )
-{
- int ret = PIPE_ERROR;
-
- /* ps_3_0
- * def c0, 1.000000, 0.000000, 0.000000, 1.000000
- * mov oC0, c0.x
- * end
- */
- static const unsigned white_tokens[] = {
- 0xffff0300,
- 0x05000051,
- 0xa00f0000,
- 0x3f800000,
- 0x00000000,
- 0x00000000,
- 0x3f800000,
- 0x02000001,
- 0x800f0800,
- 0xa0000000,
- 0x0000ffff,
- };
-
- assert(SVGA3D_INVALID_ID == UTIL_BITMASK_INVALID_INDEX);
- svga->state.white_fs_id = util_bitmask_add(svga->fs_bm);
- if(svga->state.white_fs_id == SVGA3D_INVALID_ID)
- goto no_fs_id;
-
- ret = SVGA3D_DefineShader(svga->swc,
- svga->state.white_fs_id,
- SVGA3D_SHADERTYPE_PS,
- white_tokens,
- sizeof(white_tokens));
- if (ret)
- goto no_definition;
-
- return 0;
-
-no_definition:
- util_bitmask_clear(svga->fs_bm, svga->state.white_fs_id);
- svga->state.white_fs_id = SVGA3D_INVALID_ID;
-no_fs_id:
- return ret;
-}
-
/* SVGA_NEW_TEXTURE_BINDING
* SVGA_NEW_RAST
@@ -199,6 +135,23 @@ static int make_fs_key( const struct svga_context *svga,
PIPE_WINDING_CW);
}
+ /* The blend workaround for simulating logicop xor behaviour
+ * requires that the incoming fragment color be white. This change
+ * achieves that by creating a varient of the current fragment
+ * shader that overrides all output colors with 1,1,1,1
+ *
+ * This will work for most shaders, including those containing
+ * TEXKIL and/or depth-write. However, it will break on the
+ * combination of xor-logicop plus alphatest.
+ *
+ * Ultimately, we could implement alphatest in the shader using
+ * texkil prior to overriding the outgoing fragment color.
+ *
+ * SVGA_NEW_BLEND
+ */
+ if (svga->curr.blend->need_white_fragments) {
+ key->white_fragments = 1;
+ }
/* XXX: want to limit this to the textures that the shader actually
* refers to.
@@ -238,40 +191,29 @@ static int emit_hw_fs( struct svga_context *svga,
unsigned id = SVGA3D_INVALID_ID;
int ret = 0;
+ struct svga_fragment_shader *fs = svga->curr.fs;
+ struct svga_fs_compile_key key;
+
/* SVGA_NEW_BLEND
+ * SVGA_NEW_TEXTURE_BINDING
+ * SVGA_NEW_RAST
+ * SVGA_NEW_NEED_SWTNL
+ * SVGA_NEW_SAMPLER
*/
- if (svga->curr.blend->need_white_fragments) {
- if (svga->state.white_fs_id == SVGA3D_INVALID_ID) {
- ret = emit_white_fs( svga );
- if (ret)
- return ret;
- }
- id = svga->state.white_fs_id;
- }
- else {
- struct svga_fragment_shader *fs = svga->curr.fs;
- struct svga_fs_compile_key key;
-
- /* SVGA_NEW_TEXTURE_BINDING
- * SVGA_NEW_RAST
- * SVGA_NEW_NEED_SWTNL
- * SVGA_NEW_SAMPLER
- */
- ret = make_fs_key( svga, &key );
+ ret = make_fs_key( svga, &key );
+ if (ret)
+ return ret;
+
+ result = search_fs_key( fs, &key );
+ if (!result) {
+ ret = compile_fs( svga, fs, &key, &result );
if (ret)
return ret;
-
- result = search_fs_key( fs, &key );
- if (!result) {
- ret = compile_fs( svga, fs, &key, &result );
- if (ret)
- return ret;
- }
-
- assert (result);
- id = result->id;
}
+ assert (result);
+ id = result->id;
+
assert(id != SVGA3D_INVALID_ID);
if (result != svga->state.hw_draw.fs) {
diff --git a/src/gallium/drivers/svga/svga_tgsi.h b/src/gallium/drivers/svga/svga_tgsi.h
index 737a2213af5..063c9cf4221 100644
--- a/src/gallium/drivers/svga/svga_tgsi.h
+++ b/src/gallium/drivers/svga/svga_tgsi.h
@@ -49,6 +49,7 @@ struct svga_fs_compile_key
{
unsigned light_twoside:1;
unsigned front_cw:1;
+ unsigned white_fragments:1;
unsigned num_textures:8;
unsigned num_unnormalized_coords:8;
struct {
diff --git a/src/gallium/drivers/svga/svga_tgsi_decl_sm30.c b/src/gallium/drivers/svga/svga_tgsi_decl_sm30.c
index 43fc0d32359..73102a72a83 100644
--- a/src/gallium/drivers/svga/svga_tgsi_decl_sm30.c
+++ b/src/gallium/drivers/svga/svga_tgsi_decl_sm30.c
@@ -194,8 +194,19 @@ static boolean ps30_output( struct svga_shader_emitter *emit,
switch (semantic.Name) {
case TGSI_SEMANTIC_COLOR:
- emit->output_map[idx] = dst_register( SVGA3DREG_COLOROUT,
- semantic.Index );
+ if (emit->unit == PIPE_SHADER_FRAGMENT &&
+ emit->key.fkey.white_fragments) {
+
+ emit->output_map[idx] = dst_register( SVGA3DREG_TEMP,
+ emit->nr_hw_temp++ );
+ emit->temp_col[idx] = emit->output_map[idx];
+ emit->true_col[idx] = dst_register( SVGA3DREG_COLOROUT,
+ semantic.Index );
+ }
+ else {
+ emit->output_map[idx] = dst_register( SVGA3DREG_COLOROUT,
+ semantic.Index );
+ }
break;
case TGSI_SEMANTIC_POSITION:
emit->output_map[idx] = dst_register( SVGA3DREG_TEMP,
diff --git a/src/gallium/drivers/svga/svga_tgsi_insn.c b/src/gallium/drivers/svga/svga_tgsi_insn.c
index dc5eb8fc606..41dd1fdd330 100644
--- a/src/gallium/drivers/svga/svga_tgsi_insn.c
+++ b/src/gallium/drivers/svga/svga_tgsi_insn.c
@@ -1011,10 +1011,10 @@ static boolean emit_kilp(struct svga_shader_emitter *emit,
{
SVGA3dShaderInstToken inst;
SVGA3dShaderDestToken temp;
- struct src_register one = get_zero_immediate( emit );
+ struct src_register one = scalar( get_zero_immediate( emit ),
+ TGSI_SWIZZLE_W );
inst = inst_token( SVGA3DOP_TEXKILL );
- one = scalar( one, TGSI_SWIZZLE_W );
/* texkill doesn't allow negation on the operand so lets move
* negation of {1} to a temp register */
@@ -2254,11 +2254,28 @@ static boolean emit_ps_postamble( struct svga_shader_emitter *emit )
for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
if (SVGA3dShaderGetRegType(emit->true_col[i].value) != 0) {
- if (!submit_op1( emit,
- inst_token(SVGA3DOP_MOV),
- emit->true_col[i],
- src(emit->temp_col[i]) ))
- return FALSE;
+ /* Potentially override output colors with white for XOR
+ * logicop workaround.
+ */
+ if (emit->unit == PIPE_SHADER_FRAGMENT &&
+ emit->key.fkey.white_fragments) {
+
+ struct src_register one = scalar( get_zero_immediate( emit ),
+ TGSI_SWIZZLE_W );
+
+ if (!submit_op1( emit,
+ inst_token(SVGA3DOP_MOV),
+ emit->true_col[i],
+ one ))
+ return FALSE;
+ }
+ else {
+ if (!submit_op1( emit,
+ inst_token(SVGA3DOP_MOV),
+ emit->true_col[i],
+ src(emit->temp_col[i]) ))
+ return FALSE;
+ }
}
}
@@ -2467,6 +2484,9 @@ needs_to_create_zero( struct svga_shader_emitter *emit )
if (emit->key.fkey.light_twoside)
return TRUE;
+ if (emit->key.fkey.white_fragments)
+ return TRUE;
+
if (emit->emit_frontface)
return TRUE;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 16:00:26 +0000