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mesa: Add UsesDFdy to struct gl_fragment_program.

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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().

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Paul Berry 2012-06-20 12:31:46 -07:00
parent 658a63e5d9
commit 5e310e9f83
2 changed files with 3 additions and 0 deletions
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1
src/mesa/main/mtypes.h
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@ -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;

2
src/mesa/program/program.c
View file

@ -546,6 +546,7 @@ _mesa_clone_program(struct gl_context *ctx, const struct gl_program *prog)
const struct gl_fragment_program *fp = gl_fragment_program_const(prog);
struct gl_fragment_program *fpc = gl_fragment_program(clone);
fpc->UsesKill = fp->UsesKill;
fpc->UsesDFdy = fp->UsesDFdy;
fpc->OriginUpperLeft = fp->OriginUpperLeft;
fpc->PixelCenterInteger = fp->PixelCenterInteger;
}
@ -767,6 +768,7 @@ _mesa_combine_programs(struct gl_context *ctx,
newFprog = 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...