The i965 back-end needs to compile dFdy() differently for FBOs and
window system framebuffers, because Y coordinates are flipped between
the two (see commit 82d2596: i965: Compute dFdy() correctly for FBOs).
This boolean will allow it to avoid unnecessarily recompiling shaders
that don't use dFdy().
---
src/mesa/main/mtypes.h | 1 +
src/mesa/program/program.c | 2 ++
2 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 1f74e6a..4769e10 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2011,6 +2011,7 @@ struct gl_fragment_program
{
struct gl_program Base; /**< base class */
GLboolean UsesKill; /**< shader uses KIL instruction */
+ GLboolean UsesDFdy; /**< shader uses DDY instruction */
GLboolean OriginUpperLeft;
GLboolean PixelCenterInteger;
enum gl_frag_depth_layout FragDepthLayout;
diff --git a/src/mesa/program/program.c b/src/mesa/program/program.c
index 582cbcc..3ad8377 100644
--- a/src/mesa/program/program.c
+++ b/src/mesa/program/program.c
@@ -551,6 +551,7 @@ _mesa_clone_program(struct gl_context *ctx, const struct
gl_program *prog)
= (const struct gl_fragment_program *) prog;
struct gl_fragment_program *fpc = (struct gl_fragment_program *)
clone;
fpc->UsesKill = fp->UsesKill;
+ fpc->UsesDFdy = fp->UsesDFdy;
fpc->OriginUpperLeft = fp->OriginUpperLeft;
fpc->PixelCenterInteger = fp->PixelCenterInteger;
}
@@ -772,6 +773,7 @@ _mesa_combine_programs(struct gl_context *ctx,
newFprog = (struct gl_fragment_program *) newProg;
newFprog->UsesKill = fprogA->UsesKill || fprogB->UsesKill;
+ newFprog->UsesDFdy = fprogA->UsesDFdy || fprogB->UsesDFdy;
/* We'll do a search and replace for instances
* of progB_colorFile/progB_colorIndex below...
--
1.7.7.6
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