1 files changed, 33 insertions, 5 deletions

diff --git a/src/mesa/drivers/dri/r300/r300_fragprog_common.c b/src/mesa/drivers/dri/r300/r300_fragprog_common.c
index 469c278b51..267ee81a7a 100644
--- a/src/mesa/drivers/dri/r300/r300_fragprog_common.c
+++ b/src/mesa/drivers/dri/r300/r300_fragprog_common.c
@@ -44,6 +44,7 @@
 
 #include "compiler/radeon_compiler.h"
 
+#include "radeon_mesa_to_rc.h"
 #include "r300_state.h"
 
 
@@ -99,8 +100,8 @@ static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler,
 {
 	int i;
 
+	fp->wpos_attr = FRAG_ATTRIB_MAX;
 	if (!(compiler->Base.Program.InputsRead & FRAG_BIT_WPOS)) {
-		fp->wpos_attr = FRAG_ATTRIB_MAX;
 		return;
 	}
 
@@ -112,6 +113,13 @@ static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler,
 		}
 	}
 
+	/* No free texcoord found, fall-back to software rendering */
+	if (fp->wpos_attr == FRAG_ATTRIB_MAX)
+	{
+		compiler->Base.Error = 1;
+		return;
+	}
+
 	rc_transform_fragment_wpos(&compiler->Base, FRAG_ATTRIB_WPOS, fp->wpos_attr);
 }
 
@@ -124,11 +132,11 @@ static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler,
  */
 static void rewriteFog(struct r300_fragment_program_compiler *compiler, struct r300_fragment_program * fp)
 {
-	struct prog_src_register src;
+	struct rc_src_register src;
 	int i;
 
+	fp->fog_attr = FRAG_ATTRIB_MAX;
 	if (!(compiler->Base.Program.InputsRead & FRAG_BIT_FOGC)) {
-		fp->fog_attr = FRAG_ATTRIB_MAX;
 		return;
 	}
 
@@ -140,8 +148,15 @@ static void rewriteFog(struct r300_fragment_program_compiler *compiler, struct r
 		}
 	}
 
+	/* No free texcoord found, fall-back to software rendering */
+	if (fp->fog_attr == FRAG_ATTRIB_MAX)
+	{
+		compiler->Base.Error = 1;
+		return;
+	}
+
 	memset(&src, 0, sizeof(src));
-	src.File = PROGRAM_INPUT;
+	src.File = RC_FILE_INPUT;
 	src.Index = fp->fog_attr;
 	src.Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ONE);
 	rc_move_input(&compiler->Base, FRAG_ATTRIB_FOGC, src);
@@ -218,13 +233,26 @@ static void translate_fragment_program(GLcontext *ctx, struct r300_fragment_prog
 		fflush(stderr);
 	}
 
-	rc_mesa_to_rc_program(&compiler.Base, &cont->Base.Base);
+	radeon_mesa_to_rc_program(&compiler.Base, &cont->Base.Base);
 
 	insert_WPOS_trailer(&compiler, fp);
 
 	rewriteFog(&compiler, fp);
 
 	r3xx_compile_fragment_program(&compiler);
+
+	if (compiler.is_r500) {
+		/* We need to support the non-KMS DRM interface, which
+		 * artificially limits the number of instructions and
+		 * constants which are available to us.
+		 *
+		 * See also the comment in r300_context.c where we
+		 * set the MAX_NATIVE_xxx values.
+		 */
+		if (fp->code.code.r500.inst_end >= 255 || fp->code.constants.Count > 255)
+			rc_error(&compiler.Base, "Program is too big (upgrade to r300g to avoid this limitation).\n");
+	}
+
 	fp->error = compiler.Base.Error;
 
 	fp->InputsRead = compiler.Base.Program.InputsRead;