From d6c58545a1da8c83f0aad296a5e9e31a7c77cfe4 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Fri, 20 Jan 2012 12:50:34 -0800
Subject: [PATCH] mesa: Add the remaining from/to types for
 GL_EXT_texture_integer (and R/RG).

This aborts and crashes in intel oglconform's int-textures into being
just rendering failures.  Clamping isn't handled yet.

v2: Add missing "break".
v3: Drop the int/uint distinction, since they don't need different clamping.
NOTE: This is a candidate for the 8.0 branch.

Reviewed-by: Brian Paul <brianp@vmware.com> (v2)
---
 src/mesa/main/pack.c     | 112 ++++++++++++++++++++++++---------------------
 src/mesa/main/pack_tmp.h | 115 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 176 insertions(+), 51 deletions(-)
 create mode 100644 src/mesa/main/pack_tmp.h

diff --git a/src/mesa/main/pack.c b/src/mesa/main/pack.c
index 8f2c8fd..f874ab2 100644
--- a/src/mesa/main/pack.c
+++ b/src/mesa/main/pack.c
@@ -448,65 +448,75 @@ get_type_min_max(GLenum type, GLfloat *min, GLfloat *max)
    }
 }
 
-/*
- * integer packing , no transfer operations only packs
- * to dst of GL_UNSIGNED_INT or GL_INT
+/* Customization of integer packing.  We always treat src as uint, and can pack dst
+ * as any integer type/format combo.
  */
+#define SRC_TYPE GLuint
+
+#define DST_TYPE GLuint
+#define SRC_CONVERT(x) (x)
+#define FN_NAME pack_uint_from_uint_rgba
+#include "pack_tmp.h"
+#undef DST_TYPE
+#undef SRC_CONVERT
+#undef FN_NAME
+
+#define DST_TYPE GLushort
+#define SRC_CONVERT(x) (x)
+#define FN_NAME pack_ushort_from_uint_rgba
+#include "pack_tmp.h"
+#undef DST_TYPE
+#undef SRC_CONVERT
+#undef FN_NAME
+
+#define DST_TYPE GLshort
+#define SRC_CONVERT(x) (x)
+#define FN_NAME pack_short_from_uint_rgba
+#include "pack_tmp.h"
+#undef DST_TYPE
+#undef SRC_CONVERT
+#undef FN_NAME
+
+#define DST_TYPE GLubyte
+#define SRC_CONVERT(x) (x)
+#define FN_NAME pack_ubyte_from_uint_rgba
+#include "pack_tmp.h"
+#undef DST_TYPE
+#undef SRC_CONVERT
+#undef FN_NAME
+
+#define DST_TYPE GLbyte
+#define SRC_CONVERT(x) (x)
+#define FN_NAME pack_byte_from_uint_rgba
+#include "pack_tmp.h"
+#undef DST_TYPE
+#undef SRC_CONVERT
+#undef FN_NAME
+
 void
 _mesa_pack_rgba_span_int(struct gl_context *ctx, GLuint n, GLuint rgba[][4],
                          GLenum dstFormat, GLenum dstType,
                          GLvoid *dstAddr)
 {
-   int i;
-
    switch(dstType) {
-   case GL_UNSIGNED_INT: {
-      GLuint *dst = (GLuint *) dstAddr;
-      switch (dstFormat) {
-      case GL_RED_INTEGER_EXT:
-      case GL_GREEN_INTEGER_EXT:
-      case GL_BLUE_INTEGER_EXT:
-      case GL_ALPHA_INTEGER_EXT:
-      case GL_RG_INTEGER:
-      case GL_RGB_INTEGER_EXT:
-      case GL_RGBA_INTEGER_EXT:
-      case GL_BGR_INTEGER_EXT:
-      case GL_BGRA_INTEGER_EXT:
-      case GL_LUMINANCE_INTEGER_EXT:
-      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
-         for (i=0;i<n;i++) {
-            dst[i*4+0] = (GLuint) rgba[i][RCOMP];
-            dst[i*4+1] = (GLuint) rgba[i][GCOMP];
-            dst[i*4+2] = (GLuint) rgba[i][BCOMP];
-            dst[i*4+3] = (GLuint) rgba[i][ACOMP];
-         }
-         break;
-      }
-   }
+   case GL_UNSIGNED_INT:
+      pack_uint_from_uint_rgba(dstAddr, dstFormat, rgba, n);
       break;
-   case GL_INT: {
-      GLint *dst = (GLint *) dstAddr;
-      switch (dstFormat) {
-      case GL_RED_INTEGER_EXT:
-      case GL_GREEN_INTEGER_EXT:
-      case GL_BLUE_INTEGER_EXT:
-      case GL_ALPHA_INTEGER_EXT:
-      case GL_RG_INTEGER:
-      case GL_RGB_INTEGER_EXT:
-      case GL_RGBA_INTEGER_EXT:
-      case GL_BGR_INTEGER_EXT:
-      case GL_BGRA_INTEGER_EXT:
-      case GL_LUMINANCE_INTEGER_EXT:
-      case GL_LUMINANCE_ALPHA_INTEGER_EXT:
-         for (i=0;i<n;i++) {
-            dst[i*4+0] = (GLint) rgba[i][RCOMP];
-            dst[i*4+1] = (GLint) rgba[i][GCOMP];
-            dst[i*4+2] = (GLint) rgba[i][BCOMP];
-            dst[i*4+3] = (GLint) rgba[i][ACOMP];
-         }
-         break;
-      }
-   }
+   case GL_INT:
+      /* No conversion necessary. */
+      pack_uint_from_uint_rgba(dstAddr, dstFormat, rgba, n);
+      break;
+   case GL_UNSIGNED_SHORT:
+      pack_ushort_from_uint_rgba(dstAddr, dstFormat, rgba, n);
+      break;
+   case GL_SHORT:
+      pack_short_from_uint_rgba(dstAddr, dstFormat, rgba, n);
+      break;
+   case GL_UNSIGNED_BYTE:
+      pack_ubyte_from_uint_rgba(dstAddr, dstFormat, rgba, n);
+      break;
+   case GL_BYTE:
+      pack_byte_from_uint_rgba(dstAddr, dstFormat, rgba, n);
       break;
    default:
       assert(0);
diff --git a/src/mesa/main/pack_tmp.h b/src/mesa/main/pack_tmp.h
new file mode 100644
index 0000000..83b6557
--- /dev/null
+++ b/src/mesa/main/pack_tmp.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+static void
+FN_NAME(DST_TYPE *dst,
+	GLenum dstFormat,
+	SRC_TYPE rgba[][4],
+	int n)
+{
+   int i;
+
+   switch (dstFormat) {
+   case GL_RED_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i] = SRC_CONVERT(rgba[i][RCOMP]);
+      }
+      break;
+
+   case GL_GREEN_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i] = SRC_CONVERT(rgba[i][GCOMP]);
+      }
+      break;
+
+   case GL_BLUE_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i] = SRC_CONVERT(rgba[i][BCOMP]);
+      };
+      break;
+
+   case GL_ALPHA_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i] = SRC_CONVERT(rgba[i][ACOMP]);
+      }
+      break;
+
+   case GL_RG_INTEGER:
+      for (i=0;i<n;i++) {
+	 dst[i*2+0] = SRC_CONVERT(rgba[i][RCOMP]);
+	 dst[i*2+1] = SRC_CONVERT(rgba[i][GCOMP]);
+      }
+      break;
+
+   case GL_RGB_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i*3+0] = SRC_CONVERT(rgba[i][RCOMP]);
+	 dst[i*3+1] = SRC_CONVERT(rgba[i][GCOMP]);
+	 dst[i*3+2] = SRC_CONVERT(rgba[i][BCOMP]);
+      }
+      break;
+
+   case GL_RGBA_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i*4+0] = SRC_CONVERT(rgba[i][RCOMP]);
+	 dst[i*4+1] = SRC_CONVERT(rgba[i][GCOMP]);
+	 dst[i*4+2] = SRC_CONVERT(rgba[i][BCOMP]);
+	 dst[i*4+3] = SRC_CONVERT(rgba[i][ACOMP]);
+      }
+      break;
+
+   case GL_BGR_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i*3+0] = SRC_CONVERT(rgba[i][BCOMP]);
+	 dst[i*3+1] = SRC_CONVERT(rgba[i][GCOMP]);
+	 dst[i*3+2] = SRC_CONVERT(rgba[i][RCOMP]);
+      }
+      break;
+
+   case GL_BGRA_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i*4+0] = SRC_CONVERT(rgba[i][BCOMP]);
+	 dst[i*4+1] = SRC_CONVERT(rgba[i][GCOMP]);
+	 dst[i*4+2] = SRC_CONVERT(rgba[i][RCOMP]);
+	 dst[i*4+3] = SRC_CONVERT(rgba[i][ACOMP]);
+      }
+      break;
+
+   case GL_LUMINANCE_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i] = SRC_CONVERT(rgba[i][RCOMP] +
+			      rgba[i][GCOMP] +
+			      rgba[i][BCOMP]);
+      }
+      break;
+
+   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+      for (i=0;i<n;i++) {
+	 dst[i*2+0] = SRC_CONVERT(rgba[i][RCOMP] +
+				  rgba[i][GCOMP] +
+				  rgba[i][BCOMP]);
+	 dst[i*2+1] = SRC_CONVERT(rgba[i][ACOMP]);
+      }
+      break;
+   }
+}
-- 
2.7.4