Treat image units and coordinate units differently.

Previously MaxTextureUnits was used to validate both texture image
units and texture coordinate units in fragment programs.  Instead, use
MaxTextureCoordUnits for texture coordinate units and
MaxTextureImageUnits for texture image units.

Fixes bugzilla #19468.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index 39988b5fca67c6c78afca7b18e8109da5cbb1e5d..a3a75c3b0a6f74570b46ab8e2774f2ec55a8344a 100644 (file)
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -963,6 +963,8 @@ parse_output_color_num (GLcontext * ctx, const GLubyte ** inst,
 
 
 /**
+ * Validate the index of a texture coordinate
+ *
  * \param coord The texture unit index
  * \return 0 on sucess, 1 on error
  */
@@ -972,8 +974,30 @@ parse_texcoord_num (GLcontext * ctx, const GLubyte ** inst,
 {
    GLint i = parse_integer (inst, Program);
 
-   if ((i < 0) || (i >= (int)ctx->Const.MaxTextureUnits)) {
-      program_error(ctx, Program->Position, "Invalid texture unit index");
+   if ((i < 0) || (i >= (int)ctx->Const.MaxTextureCoordUnits)) {
+      program_error(ctx, Program->Position, "Invalid texture coordinate index");
+      return 1;
+   }
+
+   *coord = (GLuint) i;
+   return 0;
+}
+
+
+/**
+ * Validate the index of a texture image unit
+ *
+ * \param coord The texture unit index
+ * \return 0 on sucess, 1 on error
+ */
+static GLuint
+parse_teximage_num (GLcontext * ctx, const GLubyte ** inst,
+                    struct arb_program *Program, GLuint * coord)
+{
+   GLint i = parse_integer (inst, Program);
+
+   if ((i < 0) || (i >= (int)ctx->Const.MaxTextureImageUnits)) {
+      program_error(ctx, Program->Position, "Invalid texture image index");
       return 1;
    }
 
@@ -981,6 +1005,7 @@ parse_texcoord_num (GLcontext * ctx, const GLubyte ** inst,
    return 0;
 }
 
+
 /**
  * \param coord The weight index
  * \return 0 on sucess, 1 on error
@@ -3003,7 +3028,7 @@ parse_fp_instruction (GLcontext * ctx, const GLubyte ** inst,
             return 1;
 
          /* texImageUnit */
-         if (parse_texcoord_num (ctx, inst, Program, &texcoord))
+         if (parse_teximage_num (ctx, inst, Program, &texcoord))
             return 1;
          fp->TexSrcUnit = texcoord;