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authorBrian Paul <brianp@vmware.com>2009-10-29 15:01:02 -0600
committerBrian Paul <brianp@vmware.com>2009-10-29 15:33:43 -0600
commit198ec96d364dabd82952a451eeda7937db383f0d (patch)
treea7e018f5580c108ce380f04301854ff8d3abd63a
parent7648c80ac8dd0631c5a0f86ad03347675a48eee6 (diff)
i965: define, use BRW_MAX_DRAW_BUFFERS
i965 might support more than 4 color draw buffers. But if not, this protects from breakage if the Mesa limit is raised.
-rw-r--r--src/mesa/drivers/dri/i965/brw_context.c1
-rw-r--r--src/mesa/drivers/dri/i965/brw_context.h9
-rw-r--r--src/mesa/drivers/dri/i965/brw_wm_surface_state.c2
3 files changed, 8 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index c300c33adc..48685c087b 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -105,6 +105,7 @@ GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
TNL_CONTEXT(ctx)->Driver.RunPipeline = _tnl_run_pipeline;
+ ctx->Const.MaxDrawBuffers = BRW_MAX_DRAW_BUFFERS;
ctx->Const.MaxTextureImageUnits = BRW_MAX_TEX_UNIT;
ctx->Const.MaxTextureCoordUnits = 8; /* Mesa limit */
ctx->Const.MaxTextureUnits = MIN2(ctx->Const.MaxTextureCoordUnits,
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 7834569761..59f9475b5a 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -252,20 +252,23 @@ struct brw_vs_ouput_sizes {
/** Number of texture sampler units */
#define BRW_MAX_TEX_UNIT 16
+/** Max number of render targets in a shader */
+#define BRW_MAX_DRAW_BUFFERS 4
+
/**
* Size of our surface binding table for the WM.
* This contains pointers to the drawing surfaces and current texture
* objects and shader constant buffers (+2).
*/
-#define BRW_WM_MAX_SURF (MAX_DRAW_BUFFERS + BRW_MAX_TEX_UNIT + 1)
+#define BRW_WM_MAX_SURF (BRW_MAX_DRAW_BUFFERS + BRW_MAX_TEX_UNIT + 1)
/**
* Helpers to convert drawing buffers, textures and constant buffers
* to surface binding table indexes, for WM.
*/
#define SURF_INDEX_DRAW(d) (d)
-#define SURF_INDEX_FRAG_CONST_BUFFER (MAX_DRAW_BUFFERS)
-#define SURF_INDEX_TEXTURE(t) (MAX_DRAW_BUFFERS + 1 + (t))
+#define SURF_INDEX_FRAG_CONST_BUFFER (BRW_MAX_DRAW_BUFFERS)
+#define SURF_INDEX_TEXTURE(t) (BRW_MAX_DRAW_BUFFERS + 1 + (t))
/**
* Size of surface binding table for the VS.
diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 73ae06eea1..3b2c6a25be 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -709,7 +709,7 @@ static void prepare_wm_surfaces(struct brw_context *brw )
}
old_nr_surfaces = brw->wm.nr_surfaces;
- brw->wm.nr_surfaces = MAX_DRAW_BUFFERS;
+ brw->wm.nr_surfaces = BRW_MAX_DRAW_BUFFERS;
if (brw->wm.surf_bo[SURF_INDEX_FRAG_CONST_BUFFER] != NULL)
brw->wm.nr_surfaces = SURF_INDEX_FRAG_CONST_BUFFER + 1;