Add a facility to route all rasterization through a fragment program

which is automatically generated to match the current texture environment
state.  Introduces a new value ctx->FragmentProgram._Active which is
true when either _Enabled is true or there is such a fragment program
ready to run.

To test out on a driver running the software rasterizer, set
MESA_TEX_PROG=t in the environment.  It goes without saying that performance
is lower for the software rasterizer in this mode.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mesa/swrast/s_aalinetemp.h b/src/mesa/swrast/s_aalinetemp.h
index aa78ef7b59..4a1e1ebda2 100644
--- a/src/mesa/swrast/s_aalinetemp.h
+++ b/src/mesa/swrast/s_aalinetemp.h
@@ -80,7 +80,7 @@ NAME(plot)(GLcontext *ctx, struct LineInfo *line, int ix, int iy)
 #ifdef DO_TEX
    {
       GLfloat invQ;
-      if (ctx->FragmentProgram._Enabled) {
+      if (ctx->FragmentProgram._Active) {
          invQ = 1.0F;
       }
       else {
@@ -100,7 +100,7 @@ NAME(plot)(GLcontext *ctx, struct LineInfo *line, int ix, int iy)
       for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
          if (ctx->Texture.Unit[unit]._ReallyEnabled) {
             GLfloat invQ;
-            if (ctx->FragmentProgram._Enabled) {
+            if (ctx->FragmentProgram._Active) {
                invQ = 1.0F;
             }
             else {