diff options
Diffstat (limited to 'src/mesa/swrast/s_nvfragprog.c')
| -rw-r--r-- | src/mesa/swrast/s_nvfragprog.c | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/src/mesa/swrast/s_nvfragprog.c b/src/mesa/swrast/s_nvfragprog.c index 94458238b51..919ffbe7998 100644 --- a/src/mesa/swrast/s_nvfragprog.c +++ b/src/mesa/swrast/s_nvfragprog.c @@ -183,26 +183,24 @@ fetch_vector4( GLcontext *ctx, static GLboolean fetch_vector4_deriv( const struct fp_src_register *source, const struct sw_span *span, - char xOrY, GLfloat result[4] ) + char xOrY, GLint column, GLfloat result[4] ) { GLfloat src[4]; ASSERT(xOrY == 'X' || xOrY == 'Y'); - assert(source->File == PROGRAM_INPUT); - switch (source->Index) { case FRAG_ATTRIB_WPOS: if (xOrY == 'X') { src[0] = 1.0; src[1] = 0.0; - src[2] = span->dzdx; + src[2] = span->dzdx / ctx->DepthMaxF; src[3] = span->dwdx; } else { src[0] = 0.0; src[1] = 1.0; - src[2] = span->dzdy; + src[2] = span->dzdy / ctx->DepthMaxF; src[3] = span->dwdy; } break; @@ -258,17 +256,22 @@ fetch_vector4_deriv( const struct fp_src_register *source, case FRAG_ATTRIB_TEX7: if (xOrY == 'X') { const GLuint u = source->Index - FRAG_ATTRIB_TEX0; - src[0] = span->texStepX[u][0] * (1.0F / CHAN_MAXF); - src[1] = span->texStepX[u][1] * (1.0F / CHAN_MAXF); - src[2] = span->texStepX[u][2] * (1.0F / CHAN_MAXF); - src[3] = span->texStepX[u][3] * (1.0F / CHAN_MAXF); + /* this is a little tricky - I think I've got it right */ + const GLfloat invQ = 1.0f / (span->tex[u][3] + + span->texStepX[u][3] * column); + src[0] = span->texStepX[u][0] * invQ; + src[1] = span->texStepX[u][1] * invQ; + src[2] = span->texStepX[u][2] * invQ; + src[3] = span->texStepX[u][3] * invQ; } else { const GLuint u = source->Index - FRAG_ATTRIB_TEX0; - src[0] = span->texStepY[u][0] * (1.0F / CHAN_MAXF); - src[1] = span->texStepY[u][1] * (1.0F / CHAN_MAXF); - src[2] = span->texStepY[u][2] * (1.0F / CHAN_MAXF); - src[3] = span->texStepY[u][3] * (1.0F / CHAN_MAXF); + /* Tricky, as above, but in Y direction */ + const GLfloat invQ = 1.0f / (span->tex[u][3] + span->texStepY[u][3]); + src[0] = span->texStepY[u][0] * invQ; + src[1] = span->texStepY[u][1] * invQ; + src[2] = span->texStepY[u][2] * invQ; + src[3] = span->texStepY[u][3] * invQ; } break; default: @@ -527,6 +530,7 @@ init_machine_deriv( GLcontext *ctx, for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) { if (program->InputsRead & (1 << (FRAG_ATTRIB_TEX0 + u))) { GLfloat *tex = (GLfloat*) machine->Inputs[FRAG_ATTRIB_TEX0 + u]; + /* XXX perspective-correct interpolation */ if (xOrY == 'X') { tex[0] += span->texStepX[u][0]; tex[1] += span->texStepX[u][1]; @@ -572,12 +576,11 @@ execute_program( GLcontext *ctx, printf("execute fragment program --------------------\n"); #endif - /* XXX: This should go someplace else, but it is safe here (and slow!) - * - karl - */ + /* XXX: This should go someplace else, but it is safe here (and slow!) + * - karl + */ _mesa_load_state_parameters(ctx, program->Parameters); - for (pc = 0; pc < maxInst; pc++) { const struct fp_instruction *inst = program->Instructions + pc; @@ -637,7 +640,7 @@ execute_program( GLcontext *ctx, { GLfloat a[4], aNext[4], result[4]; struct fp_machine dMachine; - if (!fetch_vector4_deriv(&inst->SrcReg[0], span, 'X', result)) { + if (!fetch_vector4_deriv(&inst->SrcReg[0], span, 'X', column, result)) { /* This is tricky. Make a copy of the current machine state, * increment the input registers by the dx or dy partial * derivatives, then re-execute the program up to the @@ -662,7 +665,7 @@ execute_program( GLcontext *ctx, { GLfloat a[4], aNext[4], result[4]; struct fp_machine dMachine; - if (!fetch_vector4_deriv(&inst->SrcReg[0], span, 'Y', result)) { + if (!fetch_vector4_deriv(&inst->SrcReg[0], span, 'Y', column, result)) { init_machine_deriv(ctx, machine, program, span, 'Y', &dMachine); fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a); |