r300-gallium: Add r500 passthrough shader assembly.

This allows a simple passthrough fragment shader to be provided on r500.

1 files changed, 37 insertions, 0 deletions

diff --git a/src/gallium/drivers/r300/r300_state_shader.c b/src/gallium/drivers/r300/r300_state_shader.c
index e87172128fa..710b7ee0a60 100644
--- a/src/gallium/drivers/r300/r300_state_shader.c
+++ b/src/gallium/drivers/r300/r300_state_shader.c
@@ -22,12 +22,49 @@
 
 #include "r300_state_shader.h"
 
+void r300_make_passthrough_fragment_shader(struct r300_fragment_shader* fs)
+{
+}
+
+void r500_make_passthrough_fragment_shader(struct r500_fragment_shader* fs)
+{
+    fs->shader.instruction_count = 1;
+    fs->shader.stack_size = 0;
+
+    fs->instructions[0].inst0 = R500_INST_TYPE_OUT |
+        R500_INST_TEX_SEM_WAIT |
+        R500_INST_LAST |
+        R500_INST_RGB_OMASK_RGB | R500_INST_ALPHA_OMASK |
+        R500_INST_RGB_CLAMP | R500_INST_ALPHA_CLAMP;
+    fs->instructions[0].inst1 =
+        R500_RGB_ADDR0(0) | R500_RGB_ADDR1(0) | R500_RGB_ADDR1_CONST |
+        R500_RGB_ADDR2(0) | R500_RGB_ADDR2_CONST;
+    fs->instructions[0].inst2 =
+        R500_ALPHA_ADDR0(0) | R500_ALPHA_ADDR1(0) | R500_ALPHA_ADDR1_CONST |
+        R500_ALPHA_ADDR2(0) | R500_ALPHA_ADDR2_CONST;
+    fs->instructions[0].inst3 =
+        R500_ALU_RGB_SEL_A_SRC0 | R500_ALU_RGB_R_SWIZ_A_R |
+        R500_ALU_RGB_G_SWIZ_A_G | R500_ALU_RGB_B_SWIZ_A_B |
+        R500_ALU_RGB_SEL_B_SRC0 | R500_ALU_RGB_R_SWIZ_B_R |
+        R500_ALU_RGB_B_SWIZ_B_G | R500_ALU_RGB_G_SWIZ_B_B;
+    fs->instructions[0].inst4 =
+        R500_ALPHA_OP_CMP | R500_ALPHA_SWIZ_A_A | R500_ALPHA_SWIZ_B_A;
+    fs->instructions[0].inst5 =
+        R500_ALU_RGBA_OP_CMP | R500_ALU_RGBA_R_SWIZ_0 |
+        R500_ALU_RGBA_G_SWIZ_0 | R500_ALU_RGBA_B_SWIZ_0 |
+        R500_ALU_RGBA_A_SWIZ_0;
+
+    fs->shader.translated = true;
+}
+
 void r300_translate_shader(struct r300_context* r300,
                            struct r300_fragment_shader* fs)
 {
+    r300_make_passthrough_fragment_shader(fs);
 }
 
 void r500_translate_shader(struct r300_context* r300,
                            struct r500_fragment_shader* fs)
 {
+    r500_make_passthrough_fragment_shader(fs);
 }