diff options
Diffstat (limited to 'src/mesa/swrast/s_nvfragprog.c')
| -rw-r--r-- | src/mesa/swrast/s_nvfragprog.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/src/mesa/swrast/s_nvfragprog.c b/src/mesa/swrast/s_nvfragprog.c index f7510bf3ddf..6529022fe93 100644 --- a/src/mesa/swrast/s_nvfragprog.c +++ b/src/mesa/swrast/s_nvfragprog.c @@ -1140,19 +1140,19 @@ execute_program( GLcontext *ctx, store_vector4( inst, machine, result ); } break; - case FP_OPCODE_TEX: + case FP_OPCODE_TEX: /* Both ARB and NV frag prog */ /* Texel lookup */ { GLfloat texcoord[4], color[4]; fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord ); - /* XXX: Undo perspective divide from interpolate_texcoords() */ - fetch_texel( ctx, texcoord, - span->array->lambda[inst->TexSrcUnit][column], - inst->TexSrcUnit, color ); + /* Note: we pass 0 for LOD. The ARB extension requires it + * while the NV extension says it's implementation dependant. + */ + fetch_texel( ctx, texcoord, 0.0F, inst->TexSrcUnit, color ); store_vector4( inst, machine, color ); } break; - case FP_OPCODE_TXB: + case FP_OPCODE_TXB: /* GL_ARB_fragment_program only */ /* Texel lookup with LOD bias */ { GLfloat texcoord[4], color[4], bias, lambda; @@ -1168,7 +1168,7 @@ execute_program( GLcontext *ctx, store_vector4( inst, machine, color ); } break; - case FP_OPCODE_TXD: + case FP_OPCODE_TXD: /* GL_NV_fragment_program only */ /* Texture lookup w/ partial derivatives for LOD */ { GLfloat texcoord[4], dtdx[4], dtdy[4], color[4]; @@ -1180,12 +1180,29 @@ execute_program( GLcontext *ctx, store_vector4( inst, machine, color ); } break; - case FP_OPCODE_TXP: - /* Texture lookup w/ perspective divide */ + case FP_OPCODE_TXP: /* GL_ARB_fragment_program only */ + /* Texture lookup w/ projective divide */ + { + GLfloat texcoord[4], color[4]; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord ); + texcoord[0] /= texcoord[3]; + texcoord[1] /= texcoord[3]; + texcoord[2] /= texcoord[3]; + /* Note: LOD=0 */ + fetch_texel( ctx, texcoord, 0.0F, inst->TexSrcUnit, color ); + store_vector4( inst, machine, color ); + } + break; + case FP_OPCODE_TXP_NV: /* GL_NV_fragment_program only */ + /* Texture lookup w/ projective divide */ { GLfloat texcoord[4], color[4]; fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord ); - /* Already did perspective divide in interpolate_texcoords() */ + if (inst->TexSrcBit != TEXTURE_CUBE_BIT) { + texcoord[0] /= texcoord[3]; + texcoord[1] /= texcoord[3]; + texcoord[2] /= texcoord[3]; + } fetch_texel( ctx, texcoord, span->array->lambda[inst->TexSrcUnit][column], inst->TexSrcUnit, color ); |