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swrast: Implement ARB_fragment_coord_conventions but don't enable.

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This brings swrast's support up to the state of gallium, and fixes the
default center behavior of fragment.position.xy in piglit
fp-arb-fragment-coord-conventions-none.

The extension is not enabled currently because the GLSL part of the
extension isn't supported, so piglit
glsl-arb-fragment-coord-conventions-define fails as would any serious
test of the GLSL part.
This commit is contained in:
Eric Anholt
2010-01-26 12:43:43 -08:00
parent dea98eb792
commit 11c581c6ce
1 changed files with 10 additions and 0 deletions
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10
src/mesa/swrast/s_fragprog.c
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@@ -144,12 +144,22 @@ init_machine(GLcontext *ctx, struct gl_program_machine *machine,
const struct gl_fragment_program *program, const struct gl_fragment_program *program,
const SWspan *span, GLuint col) const SWspan *span, GLuint col)
{ {
GLfloat *wpos = span->array->attribs[FRAG_ATTRIB_WPOS][col];
if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) { if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) {
/* Clear temporary registers (undefined for ARB_f_p) */ /* Clear temporary registers (undefined for ARB_f_p) */
_mesa_bzero(machine->Temporaries, _mesa_bzero(machine->Temporaries,
MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat)); MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat));
} }
/* ARB_fragment_coord_conventions */
if (program->OriginUpperLeft)
wpos[1] = ctx->DrawBuffer->Height - 1 - wpos[1];
if (!program->PixelCenterInteger) {
wpos[0] += 0.5;
wpos[1] += 0.5;
}
/* Setup pointer to input attributes */ /* Setup pointer to input attributes */
machine->Attribs = span->array->attribs; machine->Attribs = span->array->attribs;