Implement enough of ARB_fragment_program for Keith's texenv program

generation in Mesa.  Requires most recent Mesa cvs to work correctly.

Swizzle code is possibly slow/buggy and will probably be replaced.

Old behaviour can be controlled by a #define in r300_context.h, if
no-one minds I'll remove the old code later on.

Also, disabled cube map extension.  AFAIK We don't support it yet,
and it causes issues with UT2004.

1 files changed, 46 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r300/r300_fragprog.h b/src/mesa/drivers/dri/r300/r300_fragprog.h
new file mode 100644
index 00000000000..b98c6c03a77
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/r300_fragprog.h
@@ -0,0 +1,46 @@
+#ifndef __R300_FRAGPROG_H_
+#define __R300_FRAGPROG_H_
+
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+
+#include "program.h"
+#include "r300_context.h"
+#include "nvfragprog.h"
+
+/* representation of a register for emit_arith/swizzle */
+typedef struct _pfs_reg_t {
+	enum {
+		REG_TYPE_INPUT,
+		REG_TYPE_OUTPUT,
+		REG_TYPE_TEMP,
+		REG_TYPE_CONST
+	} type:2;
+	GLuint index:6;
+	GLuint v_swz:5;
+	GLuint s_swz:5;
+	GLboolean vcross:1;
+	GLboolean scross:1;
+	GLuint negate:1;    //XXX: we need to handle negate individually
+	GLboolean has_w:1;
+	GLboolean valid:1;
+} pfs_reg_t;
+
+/* supported hw opcodes */
+#define PFS_OP_MAD 0
+#define PFS_OP_DP3 1
+#define PFS_OP_DP4 2
+#define PFS_OP_MIN 3
+#define PFS_OP_MAX 4
+#define PFS_OP_CMP 5
+#define PFS_OP_FRC 6
+#define PFS_OP_EX2 7
+#define PFS_OP_LG2 8
+#define PFS_OP_RCP 9
+#define PFS_OP_RSQ 10
+#define MAX_PFS_OP 10
+#define OP(n) PFS_OP_##n
+
+#endif
+