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don't divide texcoords by q if using a fragment program

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This commit is contained in:
Brian Paul 2004-12-16 02:14:19 +00:00
parent d16aa9859c
commit c75900e7a2
1 changed files with 19 additions and 8 deletions
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27
src/mesa/swrast/s_pointtemp.h
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@ -120,14 +120,25 @@ NAME ( GLcontext *ctx, const SWvertex *vert )
#endif
#if FLAGS & TEXTURE
span->arrayMask |= SPAN_TEXTURE;
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
const GLfloat q = vert->texcoord[u][3];
const GLfloat invQ = (q == 0.0F || q == 1.0F) ? 1.0F : (1.0F / q);
texcoord[u][0] = vert->texcoord[u][0] * invQ;
texcoord[u][1] = vert->texcoord[u][1] * invQ;
texcoord[u][2] = vert->texcoord[u][2] * invQ;
texcoord[u][3] = q;
if (ctx->FragmentProgram._Enabled) {
/* Don't divide texture s,t,r by q (use TXP to do that) */
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
COPY_4V(texcoord[u], vert->texcoord[u]);
}
}
}
else {
/* Divide texture s,t,r by q here */
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
if (ctx->Texture._EnabledCoordUnits & (1 << u)) {
const GLfloat q = vert->texcoord[u][3];
const GLfloat invQ = (q == 0.0F || q == 1.0F) ? 1.0F : (1.0F / q);
texcoord[u][0] = vert->texcoord[u][0] * invQ;
texcoord[u][1] = vert->texcoord[u][1] * invQ;
texcoord[u][2] = vert->texcoord[u][2] * invQ;
texcoord[u][3] = q;
}
}
}
/* need these for fragment programs */