diff options
| -rw-r--r-- | src/mesa/swrast/s_fragprog.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c index 9ac33a26a65..1c6492cc8fa 100644 --- a/src/mesa/swrast/s_fragprog.c +++ b/src/mesa/swrast/s_fragprog.c @@ -144,12 +144,22 @@ init_machine(GLcontext *ctx, struct gl_program_machine *machine, const struct gl_fragment_program *program, const SWspan *span, GLuint col) { + GLfloat *wpos = span->array->attribs[FRAG_ATTRIB_WPOS][col]; + if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) { /* Clear temporary registers (undefined for ARB_f_p) */ _mesa_bzero(machine->Temporaries, 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 */ machine->Attribs = span->array->attribs; |