1 files changed, 77 insertions, 37 deletions

diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c
index 8eeb40f7c5..c6601f5593 100644
--- a/src/mesa/swrast/s_fragprog.c
+++ b/src/mesa/swrast/s_fragprog.c
@@ -33,6 +33,35 @@
 
 
 /**
+ * Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel'
+ * and return results in 'colorOut'.
+ */
+static INLINE void
+swizzle_texel(const GLchan texel[4], GLfloat colorOut[4], GLuint swizzle)
+{
+   if (swizzle == SWIZZLE_NOOP) {
+      colorOut[0] = CHAN_TO_FLOAT(texel[0]);
+      colorOut[1] = CHAN_TO_FLOAT(texel[1]);
+      colorOut[2] = CHAN_TO_FLOAT(texel[2]);
+      colorOut[3] = CHAN_TO_FLOAT(texel[3]);
+   }
+   else {
+      GLfloat vector[6];
+      vector[SWIZZLE_X] = CHAN_TO_FLOAT(texel[0]);
+      vector[SWIZZLE_Y] = CHAN_TO_FLOAT(texel[1]);
+      vector[SWIZZLE_Z] = CHAN_TO_FLOAT(texel[2]);
+      vector[SWIZZLE_W] = CHAN_TO_FLOAT(texel[3]);
+      vector[SWIZZLE_ZERO] = 0.0F;
+      vector[SWIZZLE_ONE] = 1.0F;
+      colorOut[0] = vector[GET_SWZ(swizzle, 0)];
+      colorOut[1] = vector[GET_SWZ(swizzle, 1)];
+      colorOut[2] = vector[GET_SWZ(swizzle, 2)];
+      colorOut[3] = vector[GET_SWZ(swizzle, 3)];
+   }
+}
+
+
+/**
  * Fetch a texel with given lod.
  * Called via machine->FetchTexelLod()
  */
@@ -40,19 +69,23 @@ static void
 fetch_texel_lod( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda,
                  GLuint unit, GLfloat color[4] )
 {
-   GLchan rgba[4];
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
    const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
 
-   lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
+   if (texObj) {
+      SWcontext *swrast = SWRAST_CONTEXT(ctx);
+      GLchan rgba[4];
+
+      lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
 
-   /* XXX use a float-valued TextureSample routine here!!! */
-   swrast->TextureSample[unit](ctx, texObj, 1, (const GLfloat (*)[4]) texcoord,
-                               &lambda, &rgba);
-   color[0] = CHAN_TO_FLOAT(rgba[0]);
-   color[1] = CHAN_TO_FLOAT(rgba[1]);
-   color[2] = CHAN_TO_FLOAT(rgba[2]);
-   color[3] = CHAN_TO_FLOAT(rgba[3]);
+      /* XXX use a float-valued TextureSample routine here!!! */
+      swrast->TextureSample[unit](ctx, texObj, 1,
+                                  (const GLfloat (*)[4]) texcoord,
+                                  &lambda, &rgba);
+      swizzle_texel(rgba, color, texObj->_Swizzle);
+   }
+   else {
+      ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
+   }
 }
 
 
@@ -68,27 +101,33 @@ fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4],
 {
    SWcontext *swrast = SWRAST_CONTEXT(ctx);
    const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
-   const struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel];
-   const GLfloat texW = (GLfloat) texImg->WidthScale;
-   const GLfloat texH = (GLfloat) texImg->HeightScale;
-   GLchan rgba[4];
-
-   GLfloat lambda
-      = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */
-                               texdx[1], texdy[1], /* dt/dx, dt/dy */
-                               texdx[3], texdy[2], /* dq/dx, dq/dy */
-                               texW, texH,
-                               texcoord[0], texcoord[1], texcoord[3],
-                               1.0F / texcoord[3]) + lodBias;
-
-   lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
-
-   swrast->TextureSample[unit](ctx, texObj, 1, (const GLfloat (*)[4]) texcoord,
-                               &lambda, &rgba);
-   color[0] = CHAN_TO_FLOAT(rgba[0]);
-   color[1] = CHAN_TO_FLOAT(rgba[1]);
-   color[2] = CHAN_TO_FLOAT(rgba[2]);
-   color[3] = CHAN_TO_FLOAT(rgba[3]);
+
+   if (texObj) {
+      const struct gl_texture_image *texImg =
+         texObj->Image[0][texObj->BaseLevel];
+      const GLfloat texW = (GLfloat) texImg->WidthScale;
+      const GLfloat texH = (GLfloat) texImg->HeightScale;
+      GLfloat lambda;
+      GLchan rgba[4];
+
+      lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */
+                                      texdx[1], texdy[1], /* dt/dx, dt/dy */
+                                      texdx[3], texdy[2], /* dq/dx, dq/dy */
+                                      texW, texH,
+                                      texcoord[0], texcoord[1], texcoord[3],
+                                      1.0F / texcoord[3]) + lodBias;
+
+      lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);
+
+      /* XXX use a float-valued TextureSample routine here!!! */
+      swrast->TextureSample[unit](ctx, texObj, 1,
+                                  (const GLfloat (*)[4]) texcoord,
+                                  &lambda, &rgba);
+      swizzle_texel(rgba, color, texObj->_Swizzle);
+   }
+   else {
+      ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F);
+   }
 }
 
 
@@ -124,7 +163,8 @@ init_machine(GLcontext *ctx, struct gl_program_machine *machine,
    /* if running a GLSL program (not ARB_fragment_program) */
    if (ctx->Shader.CurrentProgram) {
       /* Store front/back facing value in register FOGC.Y */
-      machine->Attribs[FRAG_ATTRIB_FOGC][col][1] = (GLfloat) ctx->_Facing;
+      machine->Attribs[FRAG_ATTRIB_FOGC][col][1] = 1.0 - span->facing;
+      /* Note FOGC.ZW is gl_PointCoord if drawing a sprite */
    }
 
    machine->CurElement = col;
@@ -171,11 +211,11 @@ run_program(GLcontext *ctx, SWspan *span, GLuint start, GLuint end)
                 * Note that colors beyond 0 and 1 will overwrite other
                 * attributes, such as FOGC, TEX0, TEX1, etc.  That's OK.
                 */
-               GLuint output;
-               for (output = 0; output < swrast->_NumColorOutputs; output++) {
-                  if (outputsWritten & (1 << (FRAG_RESULT_DATA0 + output))) {
-                     COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0+output][i],
-                             machine->Outputs[FRAG_RESULT_DATA0 + output]);
+               GLuint buf;
+               for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
+                  if (outputsWritten & (1 << (FRAG_RESULT_DATA0 + buf))) {
+                     COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0 + buf][i],
+                             machine->Outputs[FRAG_RESULT_DATA0 + buf]);
                   }
                }
             }