diff options
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/drivers/r600/r600_shader.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c index 350ba3cb332..bb0a9a99e7d 100644 --- a/src/gallium/drivers/r600/r600_shader.c +++ b/src/gallium/drivers/r600/r600_shader.c @@ -329,6 +329,38 @@ static int evergreen_interp_flat(struct r600_shader_ctx *ctx, int input) return 0; } +/* + * Special export handling in shaders + * + * shader export ARRAY_BASE for EXPORT_POS: + * 60 is position + * 61 is misc vector + * 62, 63 are clip distance vectors + * + * The use of the values exported in 61-63 are controlled by PA_CL_VS_OUT_CNTL: + * VS_OUT_MISC_VEC_ENA - enables the use of all fields in export 61 + * USE_VTX_POINT_SIZE - point size in the X channel of export 61 + * USE_VTX_EDGE_FLAG - edge flag in the Y channel of export 61 + * USE_VTX_RENDER_TARGET_INDX - render target index in the Z channel of export 61 + * USE_VTX_VIEWPORT_INDX - viewport index in the W channel of export 61 + * USE_VTX_KILL_FLAG - kill flag in the Z channel of export 61 (mutually + * exclusive from render target index) + * VS_OUT_CCDIST0_VEC_ENA/VS_OUT_CCDIST1_VEC_ENA - enable clip distance vectors + * + * + * shader export ARRAY_BASE for EXPORT_PIXEL: + * 0-7 CB targets + * 61 computed Z vector + * + * The use of the values exported in the computed Z vector are controlled + * by DB_SHADER_CONTROL: + * Z_EXPORT_ENABLE - Z as a float in RED + * STENCIL_REF_EXPORT_ENABLE - stencil ref as int in GREEN + * COVERAGE_TO_MASK_ENABLE - alpha to mask in ALPHA + * MASK_EXPORT_ENABLE - pixel sample mask in BLUE + * DB_SOURCE_FORMAT - export control restrictions + * + */ static int tgsi_declaration(struct r600_shader_ctx *ctx) { struct tgsi_full_declaration *d = &ctx->parse.FullToken.FullDeclaration; |