mesa: new format_pack.c code

This code packs colors, Z, stencil, etc. in the various mesa pixel
formats.  Will be used for things like glDrawPixels, glTexImage,
glAccum, etc.

4 files changed, 2596 insertions, 0 deletions

diff --git a/src/mesa/SConscript b/src/mesa/SConscript
index bcb6a24913..5c50189614 100644
--- a/src/mesa/SConscript
+++ b/src/mesa/SConscript
@@ -74,6 +74,7 @@ main_sources = [
     'main/ffvertex_prog.c',
     'main/fog.c',
     'main/formats.c',
+    'main/format_pack.c',
     'main/format_unpack.c',
     'main/framebuffer.c',
     'main/get.c',
diff --git a/src/mesa/main/format_pack.c b/src/mesa/main/format_pack.c
new file mode 100644
index 0000000000..ba23babf68
--- /dev/null
+++ b/src/mesa/main/format_pack.c
@@ -0,0 +1,2496 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (c) 2011 VMware, Inc.
+ *
+ * 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 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 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.
+ */
+
+
+/**
+ * Color, depth, stencil packing functions.
+ * Used to pack basic color, depth and stencil formats to specific
+ * hardware formats.
+ *
+ * There are both per-pixel and per-row packing functions:
+ * - The former will be used by swrast to write values to the color, depth,
+ *   stencil buffers when drawing points, lines and masked spans.
+ * - The later will be used for image-oriented functions like glDrawPixels,
+ *   glAccum, and glTexImage.
+ */
+
+
+#include "colormac.h"
+#include "format_pack.h"
+#include "macros.h"
+#include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
+#include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
+
+
+typedef void (*pack_ubyte_rgba_row_func)(GLuint n,
+                                         const GLubyte src[][4], void *dst);
+
+typedef void (*pack_float_rgba_row_func)(GLuint n,
+                                         const GLfloat src[][4], void *dst);
+
+
+
+static inline GLfloat
+linear_to_srgb(GLfloat cl)
+{
+   if (cl < 0.0f)
+      return 0.0f;
+   else if (cl < 0.0031308f)
+      return 12.92f * cl;
+   else if (cl < 1.0f)
+      return 1.055f * powf(cl, 0.41666f) - 0.055f;
+   else
+      return 1.0f;
+}
+
+
+static inline GLubyte
+linear_float_to_srgb_ubyte(GLfloat cl)
+{
+   GLubyte res = FLOAT_TO_UBYTE(linear_to_srgb(cl));
+   return res;
+}
+
+
+static inline GLubyte
+linear_ubyte_to_srgb_ubyte(GLubyte cl)
+{
+   GLubyte res = FLOAT_TO_UBYTE(linear_to_srgb(cl / 255.0f));
+   return res;
+}
+
+
+
+
+/*
+ * MESA_FORMAT_RGBA8888
+ */
+
+static void
+pack_ubyte_RGBA8888(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   *d = PACK_COLOR_8888(src[RCOMP], src[GCOMP], src[BCOMP], src[ACOMP]);
+}
+
+static void
+pack_float_RGBA8888(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_RGBA8888(v, dst);
+}
+
+static void
+pack_row_ubyte_RGBA8888(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i] = PACK_COLOR_8888(src[i][RCOMP], src[i][GCOMP],
+                             src[i][BCOMP], src[i][ACOMP]);
+   }
+}
+
+static void
+pack_row_float_RGBA8888(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_RGBA8888(v, d + i);
+   }
+}
+
+
+
+/*
+ * MESA_FORMAT_RGBA8888_REV
+ */
+
+static void
+pack_ubyte_RGBA8888_REV(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   *d = PACK_COLOR_8888(src[ACOMP], src[BCOMP], src[GCOMP], src[RCOMP]);
+}
+
+static void
+pack_float_RGBA8888_REV(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_RGBA8888_REV(v, dst);
+}
+
+static void
+pack_row_ubyte_RGBA8888_REV(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i] = PACK_COLOR_8888(src[i][ACOMP], src[i][BCOMP],
+                             src[i][GCOMP], src[i][RCOMP]);
+   }
+}
+
+static void
+pack_row_float_RGBA8888_REV(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_RGBA8888_REV(v, d + i);
+   }
+}
+
+
+/*
+ * MESA_FORMAT_ARGB8888
+ */
+
+static void
+pack_ubyte_ARGB8888(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   *d = PACK_COLOR_8888(src[ACOMP], src[RCOMP], src[GCOMP], src[BCOMP]);
+}
+
+static void
+pack_float_ARGB8888(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_ARGB8888(v, dst);
+}
+
+static void
+pack_row_ubyte_ARGB8888(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i] = PACK_COLOR_8888(src[i][ACOMP], src[i][RCOMP],
+                             src[i][GCOMP], src[i][BCOMP]);
+   }
+}
+
+static void
+pack_row_float_ARGB8888(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_ARGB8888(v, d + i);
+   }
+}
+
+
+/*
+ * MESA_FORMAT_ARGB8888_REV
+ */
+
+static void
+pack_ubyte_ARGB8888_REV(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   *d = PACK_COLOR_8888(src[BCOMP], src[GCOMP], src[RCOMP], src[ACOMP]);
+}
+
+static void
+pack_float_ARGB8888_REV(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_ARGB8888_REV(v, dst);
+}
+
+static void
+pack_row_ubyte_ARGB8888_REV(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i] = PACK_COLOR_8888(src[i][BCOMP], src[i][GCOMP],
+                             src[i][RCOMP], src[i][ACOMP]);
+   }
+}
+
+static void
+pack_row_float_ARGB8888_REV(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_ARGB8888_REV(v, d + i);
+   }
+}
+
+
+/*
+ * MESA_FORMAT_XRGB8888
+ */
+
+static void
+pack_ubyte_XRGB8888(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   *d = PACK_COLOR_8888(0x0, src[RCOMP], src[GCOMP], src[BCOMP]);
+}
+
+static void
+pack_float_XRGB8888(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_XRGB8888(v, dst);
+}
+
+static void
+pack_row_ubyte_XRGB8888(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i] = PACK_COLOR_8888(0, src[i][RCOMP], src[i][GCOMP], src[i][BCOMP]);
+   }
+}
+
+static void
+pack_row_float_XRGB8888(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_XRGB8888(v, d + i);
+   }
+}
+
+
+/*
+ * MESA_FORMAT_XRGB8888_REV
+ */
+
+static void
+pack_ubyte_XRGB8888_REV(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   *d = PACK_COLOR_8888(src[BCOMP], src[GCOMP], src[RCOMP], 0);
+}
+
+static void
+pack_float_XRGB8888_REV(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_XRGB8888_REV(v, dst);
+}
+
+static void
+pack_row_ubyte_XRGB8888_REV(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i] = PACK_COLOR_8888(src[i][BCOMP], src[i][GCOMP], src[i][RCOMP], 0);
+   }
+}
+
+static void
+pack_row_float_XRGB8888_REV(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_XRGB8888_REV(v, d + i);
+   }
+}
+
+
+/*
+ * MESA_FORMAT_RGB888
+ */
+
+static void
+pack_ubyte_RGB888(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   d[2] = src[RCOMP];
+   d[1] = src[GCOMP];
+   d[0] = src[BCOMP];
+}
+
+static void
+pack_float_RGB888(const GLfloat src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[2], src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[1], src[GCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[0], src[BCOMP]);
+}
+
+static void
+pack_row_ubyte_RGB888(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i*3+2] = src[i][RCOMP];
+      d[i*3+1] = src[i][GCOMP];
+      d[i*3+0] = src[i][BCOMP];
+   }
+}
+
+static void
+pack_row_float_RGB888(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      d[i*3+2] = v[RCOMP];
+      d[i*3+1] = v[GCOMP];
+      d[i*3+0] = v[BCOMP];
+   }
+}
+
+
+/*
+ * MESA_FORMAT_BGR888
+ */
+
+static void
+pack_ubyte_BGR888(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   d[2] = src[BCOMP];
+   d[1] = src[GCOMP];
+   d[0] = src[RCOMP];
+}
+
+static void
+pack_float_BGR888(const GLfloat src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[2], src[BCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[1], src[GCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[0], src[RCOMP]);
+}
+
+static void
+pack_row_ubyte_BGR888(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      d[i*3+2] = src[i][BCOMP];
+      d[i*3+1] = src[i][GCOMP];
+      d[i*3+0] = src[i][RCOMP];
+   }
+}
+
+static void
+pack_row_float_BGR888(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      d[i*3+2] = v[BCOMP];
+      d[i*3+1] = v[GCOMP];
+      d[i*3+0] = v[RCOMP];
+   }
+}
+
+
+/*
+ * MESA_FORMAT_RGB565
+ */
+
+static void
+pack_ubyte_RGB565(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_565(src[RCOMP], src[GCOMP], src[BCOMP]);
+}
+
+static void
+pack_float_RGB565(const GLfloat src[4], void *dst)
+{
+   GLubyte v[3];
+   UNCLAMPED_FLOAT_TO_UBYTE(v[0], src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(v[1], src[GCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(v[2], src[BCOMP]);
+   pack_ubyte_RGB565(v, dst);
+}
+
+static void
+pack_row_ubyte_RGB565(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      pack_ubyte_RGB565(src[i], d + i);
+   }
+}
+
+static void
+pack_row_float_RGB565(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_RGB565(v, d + i);
+   }
+}
+
+
+/*
+ * MESA_FORMAT_RGB565_REV
+ */
+
+static void
+pack_ubyte_RGB565_REV(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_565_REV(src[RCOMP], src[GCOMP], src[BCOMP]);
+}
+
+static void
+pack_float_RGB565_REV(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLubyte r, g, b;
+   UNCLAMPED_FLOAT_TO_UBYTE(r, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(g, src[GCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(b, src[BCOMP]);
+   *d = PACK_COLOR_565_REV(r, g, b);
+}
+
+static void
+pack_row_ubyte_RGB565_REV(GLuint n, const GLubyte src[][4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      pack_ubyte_RGB565_REV(src[i], d + i);
+   }
+}
+
+static void
+pack_row_float_RGB565_REV(GLuint n, const GLfloat src[][4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLubyte v[4];
+      _mesa_unclamped_float_rgba_to_ubyte(v, src[i]);
+      pack_ubyte_RGB565_REV(v, d + i);
+   }
+}
+
+
+/*
+ * MESA_FORMAT_ARGB4444
+ */
+
+static void
+pack_ubyte_ARGB4444(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_4444(src[ACOMP], src[RCOMP], src[GCOMP], src[BCOMP]);
+}
+
+static void
+pack_float_ARGB4444(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_ARGB4444(v, dst);
+}
+
+/* use fallback row packing functions */
+
+
+/*
+ * MESA_FORMAT_ARGB4444_REV
+ */
+
+static void
+pack_ubyte_ARGB4444_REV(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_4444(src[GCOMP], src[BCOMP], src[ACOMP], src[RCOMP]);
+}
+
+static void
+pack_float_ARGB4444_REV(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_ARGB4444_REV(v, dst);
+}
+
+/* use fallback row packing functions */
+
+
+/*
+ * MESA_FORMAT_RGBA5551
+ */
+
+static void
+pack_ubyte_RGBA5551(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_5551(src[RCOMP], src[GCOMP], src[BCOMP], src[ACOMP]);
+}
+
+static void
+pack_float_RGBA5551(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_RGBA5551(v, dst);
+}
+
+/* use fallback row packing functions */
+
+
+/*
+ * MESA_FORMAT_ARGB1555
+ */
+
+static void
+pack_ubyte_ARGB1555(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_1555(src[ACOMP], src[RCOMP], src[GCOMP], src[BCOMP]);
+}
+
+static void
+pack_float_ARGB1555(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_ARGB1555(v, dst);
+}
+
+
+/* MESA_FORMAT_ARGB1555_REV */
+
+static void
+pack_ubyte_ARGB1555_REV(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst), tmp;
+   tmp = PACK_COLOR_1555(src[ACOMP], src[RCOMP], src[GCOMP], src[BCOMP]);
+   *d = (tmp >> 8) | (tmp << 8);
+}
+
+static void
+pack_float_ARGB1555_REV(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   _mesa_unclamped_float_rgba_to_ubyte(v, src);
+   pack_ubyte_ARGB1555_REV(v, dst);
+}
+
+
+/* MESA_FORMAT_AL44 */
+
+static void
+pack_ubyte_AL44(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_44(src[ACOMP], src[RCOMP]);
+}
+
+static void
+pack_float_AL44(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   UNCLAMPED_FLOAT_TO_UBYTE(v[0], src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(v[3], src[ACOMP]);
+   pack_ubyte_AL44(v, dst);
+}
+
+
+/* MESA_FORMAT_AL88 */
+
+static void
+pack_ubyte_AL88(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_88(src[ACOMP], src[RCOMP]);
+}
+
+static void
+pack_float_AL88(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   UNCLAMPED_FLOAT_TO_UBYTE(v[0], src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(v[3], src[ACOMP]);
+   pack_ubyte_AL88(v, dst);
+}
+
+
+/* MESA_FORMAT_AL88_REV */
+
+static void
+pack_ubyte_AL88_REV(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_88(src[RCOMP], src[ACOMP]);
+}
+
+static void
+pack_float_AL88_REV(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   UNCLAMPED_FLOAT_TO_UBYTE(v[0], src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(v[3], src[ACOMP]);
+   pack_ubyte_AL88_REV(v, dst);
+}
+
+
+/* MESA_FORMAT_AL1616 */
+
+static void
+pack_ubyte_AL1616(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort l = UBYTE_TO_USHORT(src[RCOMP]);
+   GLushort a = UBYTE_TO_USHORT(src[ACOMP]);
+   *d = PACK_COLOR_1616(a, l);
+}
+
+static void
+pack_float_AL1616(const GLfloat src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort l, a;
+   UNCLAMPED_FLOAT_TO_USHORT(l, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(a, src[ACOMP]);
+   *d = PACK_COLOR_1616(a, l);
+}
+
+
+/* MESA_FORMAT_AL1616_REV */
+
+static void
+pack_ubyte_AL1616_REV(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort l = UBYTE_TO_USHORT(src[RCOMP]);
+   GLushort a = UBYTE_TO_USHORT(src[ACOMP]);
+   *d = PACK_COLOR_1616(l, a);
+}
+
+static void
+pack_float_AL1616_REV(const GLfloat src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort l, a;
+   UNCLAMPED_FLOAT_TO_USHORT(l, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(a, src[ACOMP]);
+   *d = PACK_COLOR_1616(l, a);
+}
+
+
+/* MESA_FORMAT_RGB332 */
+
+static void
+pack_ubyte_RGB332(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   *d = PACK_COLOR_332(src[RCOMP], src[GCOMP], src[BCOMP]);
+}
+
+static void
+pack_float_RGB332(const GLfloat src[4], void *dst)
+{
+   GLubyte v[4];
+   UNCLAMPED_FLOAT_TO_UBYTE(v[0], src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(v[1], src[GCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(v[2], src[BCOMP]);
+   pack_ubyte_RGB332(v, dst);
+}
+
+
+/* MESA_FORMAT_A8 */
+
+static void
+pack_ubyte_A8(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   *d = src[ACOMP];
+}
+
+static void
+pack_float_A8(const GLfloat src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[0], src[ACOMP]);
+}
+
+
+/* MESA_FORMAT_A16 */
+
+static void
+pack_ubyte_A16(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = UBYTE_TO_USHORT(src[ACOMP]);
+}
+
+static void
+pack_float_A16(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   UNCLAMPED_FLOAT_TO_USHORT(d[0], src[ACOMP]);
+}
+
+
+/* MESA_FORMAT_L8 */
+
+static void
+pack_ubyte_L8(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   *d = src[RCOMP];
+}
+
+static void
+pack_float_L8(const GLfloat src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   UNCLAMPED_FLOAT_TO_UBYTE(d[0], src[RCOMP]);
+}
+
+
+/* MESA_FORMAT_L16 */
+
+static void
+pack_ubyte_L16(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = UBYTE_TO_USHORT(src[RCOMP]);
+}
+
+static void
+pack_float_L16(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   UNCLAMPED_FLOAT_TO_USHORT(d[0], src[RCOMP]);
+}
+
+
+/* MESA_FORMAT_YCBCR */
+
+static void
+pack_ubyte_YCBCR(const GLubyte src[4], void *dst)
+{
+   /* todo */
+}
+
+static void
+pack_float_YCBCR(const GLfloat src[4], void *dst)
+{
+   /* todo */
+}
+
+
+/* MESA_FORMAT_YCBCR_REV */
+
+static void
+pack_ubyte_YCBCR_REV(const GLubyte src[4], void *dst)
+{
+   /* todo */
+}
+
+static void
+pack_float_YCBCR_REV(const GLfloat src[4], void *dst)
+{
+   /* todo */
+}
+
+
+/* MESA_FORMAT_R8 */
+
+static void
+pack_ubyte_R8(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   *d = src[RCOMP];
+}
+
+static void
+pack_float_R8(const GLfloat src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   GLubyte r;
+   UNCLAMPED_FLOAT_TO_UBYTE(r, src[RCOMP]);
+   d[0] = r;
+}
+
+
+/* MESA_FORMAT_GR88 */
+
+static void
+pack_ubyte_GR88(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   *d = PACK_COLOR_88(src[GCOMP], src[RCOMP]);
+}
+
+static void
+pack_float_GR88(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLubyte r, g;
+   UNCLAMPED_FLOAT_TO_UBYTE(r, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(g, src[GCOMP]);
+   *d = PACK_COLOR_88(g, r);
+}
+
+
+/* MESA_FORMAT_RG88 */
+
+static void
+pack_ubyte_RG88(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   *d = PACK_COLOR_88(src[RCOMP], src[GCOMP]);
+}
+
+static void
+pack_float_RG88(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLubyte r, g;
+   UNCLAMPED_FLOAT_TO_UBYTE(r, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(g, src[GCOMP]);
+   *d = PACK_COLOR_88(r, g);
+}
+
+
+/* MESA_FORMAT_R16 */
+
+static void
+pack_ubyte_R16(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = UBYTE_TO_USHORT(src[RCOMP]);
+}
+
+static void
+pack_float_R16(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   UNCLAMPED_FLOAT_TO_USHORT(d[0], src[RCOMP]);
+}
+
+
+/* MESA_FORMAT_RG1616 */
+
+static void
+pack_ubyte_RG1616(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort r = UBYTE_TO_USHORT(src[RCOMP]);
+   GLushort g = UBYTE_TO_USHORT(src[GCOMP]);
+   *d = PACK_COLOR_1616(g, r);
+}
+
+static void
+pack_float_RG1616(const GLfloat src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort r, g;
+   UNCLAMPED_FLOAT_TO_USHORT(r, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(g, src[GCOMP]);
+   *d = PACK_COLOR_1616(g, r);
+}
+
+
+/* MESA_FORMAT_RG1616_REV */
+
+static void
+pack_ubyte_RG1616_REV(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort r = UBYTE_TO_USHORT(src[RCOMP]);
+   GLushort g = UBYTE_TO_USHORT(src[GCOMP]);
+   *d = PACK_COLOR_1616(r, g);
+}
+
+
+static void
+pack_float_RG1616_REV(const GLfloat src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort r, g;
+   UNCLAMPED_FLOAT_TO_USHORT(r, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(g, src[GCOMP]);
+   *d = PACK_COLOR_1616(r, g);
+}
+
+
+/* MESA_FORMAT_ARGB2101010 */
+
+static void
+pack_ubyte_ARGB2101010(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort r = UBYTE_TO_USHORT(src[RCOMP]);
+   GLushort g = UBYTE_TO_USHORT(src[GCOMP]);
+   GLushort b = UBYTE_TO_USHORT(src[BCOMP]);
+   GLushort a = UBYTE_TO_USHORT(src[ACOMP]);
+   *d = PACK_COLOR_2101010_US(a, r, g, b);
+}
+
+static void
+pack_float_ARGB2101010(const GLfloat src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLushort r, g, b, a;
+   UNCLAMPED_FLOAT_TO_USHORT(r, src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(g, src[GCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(b, src[BCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(a, src[ACOMP]);
+   *d = PACK_COLOR_2101010_US(a, r, g, b);
+}
+
+
+/* MESA_FORMAT_SRGB8 */
+
+static void
+pack_ubyte_SRGB8(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   d[2] = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   d[1] = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   d[0] = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+}
+
+static void
+pack_float_SRGB8(const GLfloat src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   d[2] = linear_float_to_srgb_ubyte(src[RCOMP]);
+   d[1] = linear_float_to_srgb_ubyte(src[GCOMP]);
+   d[0] = linear_float_to_srgb_ubyte(src[BCOMP]);
+}
+
+
+/* MESA_FORMAT_SRGBA8 */
+
+static void
+pack_ubyte_SRGBA8(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLubyte r = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   GLubyte g = linear_ubyte_to_srgb_ubyte(src[GCOMP]);
+   GLubyte b = linear_ubyte_to_srgb_ubyte(src[BCOMP]);
+   *d = PACK_COLOR_8888(r, g, b, src[ACOMP]);
+}
+
+static void
+pack_float_SRGBA8(const GLfloat src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLubyte r, g, b, a;
+   r = linear_float_to_srgb_ubyte(src[RCOMP]);
+   g = linear_float_to_srgb_ubyte(src[GCOMP]);
+   b = linear_float_to_srgb_ubyte(src[BCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(a, src[ACOMP]);
+   *d = PACK_COLOR_8888(r, g, b, a);
+}
+
+
+/* MESA_FORMAT_SARGB8 */
+
+static void
+pack_ubyte_SARGB8(const GLubyte src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLubyte r = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   GLubyte g = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   GLubyte b = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   *d = PACK_COLOR_8888(src[ACOMP], r, g, b);
+}
+
+static void
+pack_float_SARGB8(const GLfloat src[4], void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   GLubyte r, g, b, a;
+   r = linear_float_to_srgb_ubyte(src[RCOMP]);
+   g = linear_float_to_srgb_ubyte(src[GCOMP]);
+   b = linear_float_to_srgb_ubyte(src[BCOMP]);
+   UNCLAMPED_FLOAT_TO_UBYTE(a, src[ACOMP]);
+   *d = PACK_COLOR_8888(a, r, g, b);
+}
+
+
+/* MESA_FORMAT_SL8 */
+
+static void
+pack_ubyte_SL8(const GLubyte src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   *d = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+}
+
+static void
+pack_float_SL8(const GLfloat src[4], void *dst)
+{
+   GLubyte *d = ((GLubyte *) dst);
+   GLubyte l = linear_float_to_srgb_ubyte(src[RCOMP]);
+   *d = l;
+}
+
+
+/* MESA_FORMAT_SLA8 */
+
+static void
+pack_ubyte_SLA8(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLubyte l = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   *d = PACK_COLOR_88(src[ACOMP], l);
+}
+
+static void
+pack_float_SLA8(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLubyte a, l = linear_float_to_srgb_ubyte(src[RCOMP]);
+   CLAMPED_FLOAT_TO_UBYTE(a, src[ACOMP]);
+   *d = PACK_COLOR_88(a, l);
+}
+
+
+/* MESA_FORMAT_RGBA_FLOAT32 */
+
+static void
+pack_ubyte_RGBA_FLOAT32(const GLubyte src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = UBYTE_TO_FLOAT(src[0]);
+   d[1] = UBYTE_TO_FLOAT(src[1]);
+   d[2] = UBYTE_TO_FLOAT(src[2]);
+   d[3] = UBYTE_TO_FLOAT(src[3]);
+}
+
+static void
+pack_float_RGBA_FLOAT32(const GLfloat src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = src[0];
+   d[1] = src[1];
+   d[2] = src[2];
+   d[3] = src[3];
+}
+
+
+/* MESA_FORMAT_RGBA_FLOAT16 */
+
+static void
+pack_ubyte_RGBA_FLOAT16(const GLubyte src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[0]));
+   d[1] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[1]));
+   d[2] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[2]));
+   d[3] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[3]));
+}
+
+static void
+pack_float_RGBA_FLOAT16(const GLfloat src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(src[0]);
+   d[1] = _mesa_float_to_half(src[1]);
+   d[2] = _mesa_float_to_half(src[2]);
+   d[3] = _mesa_float_to_half(src[3]);
+}
+
+
+/* MESA_FORMAT_RGB_FLOAT32 */
+
+static void
+pack_ubyte_RGB_FLOAT32(const GLubyte src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = UBYTE_TO_FLOAT(src[0]);
+   d[1] = UBYTE_TO_FLOAT(src[1]);
+   d[2] = UBYTE_TO_FLOAT(src[2]);
+}
+
+static void
+pack_float_RGB_FLOAT32(const GLfloat src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = src[0];
+   d[1] = src[1];
+   d[2] = src[2];
+}
+
+
+/* MESA_FORMAT_RGB_FLOAT16 */
+
+static void
+pack_ubyte_RGB_FLOAT16(const GLubyte src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[0]));
+   d[1] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[1]));
+   d[2] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[2]));
+}
+
+static void
+pack_float_RGB_FLOAT16(const GLfloat src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(src[0]);
+   d[1] = _mesa_float_to_half(src[1]);
+   d[2] = _mesa_float_to_half(src[2]);
+}
+
+
+/* MESA_FORMAT_ALPHA_FLOAT32 */
+
+static void
+pack_ubyte_ALPHA_FLOAT32(const GLubyte src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = UBYTE_TO_FLOAT(src[ACOMP]);
+}
+
+static void
+pack_float_ALPHA_FLOAT32(const GLfloat src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = src[ACOMP];
+}
+
+
+/* MESA_FORMAT_ALPHA_FLOAT16 */
+
+static void
+pack_ubyte_ALPHA_FLOAT16(const GLubyte src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[ACOMP]));
+}
+
+static void
+pack_float_ALPHA_FLOAT16(const GLfloat src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(src[ACOMP]);
+}
+
+
+/* MESA_FORMAT_LUMINANCE_FLOAT32 (and INTENSITY_FLOAT32, R_FLOAT32) */
+
+static void
+pack_ubyte_LUMINANCE_FLOAT32(const GLubyte src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = UBYTE_TO_FLOAT(src[RCOMP]);
+}
+
+static void
+pack_float_LUMINANCE_FLOAT32(const GLfloat src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = src[RCOMP];
+}
+
+
+/* MESA_FORMAT_LUMINANCE_FLOAT16 (and INTENSITY_FLOAT16, R_FLOAT32) */
+
+static void
+pack_ubyte_LUMINANCE_FLOAT16(const GLubyte src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[RCOMP]));
+}
+
+static void
+pack_float_LUMINANCE_FLOAT16(const GLfloat src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(src[RCOMP]);
+}
+
+
+/* MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32 */
+
+static void
+pack_ubyte_LUMINANCE_ALPHA_FLOAT32(const GLubyte src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = UBYTE_TO_FLOAT(src[RCOMP]);
+   d[1] = UBYTE_TO_FLOAT(src[ACOMP]);
+}
+
+static void
+pack_float_LUMINANCE_ALPHA_FLOAT32(const GLfloat src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = src[RCOMP];
+   d[1] = src[ACOMP];
+}
+
+
+/* MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16 */
+
+static void
+pack_ubyte_LUMINANCE_ALPHA_FLOAT16(const GLubyte src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[RCOMP]));
+   d[1] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[ACOMP]));
+}
+
+static void
+pack_float_LUMINANCE_ALPHA_FLOAT16(const GLfloat src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(src[RCOMP]);
+   d[1] = _mesa_float_to_half(src[ACOMP]);
+}
+
+
+/* MESA_FORMAT_RG_FLOAT32 */
+
+static void
+pack_ubyte_RG_FLOAT32(const GLubyte src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = UBYTE_TO_FLOAT(src[RCOMP]);
+   d[1] = UBYTE_TO_FLOAT(src[GCOMP]);
+}
+
+static void
+pack_float_RG_FLOAT32(const GLfloat src[4], void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[0] = src[RCOMP];
+   d[1] = src[GCOMP];
+}
+
+
+/* MESA_FORMAT_RG_FLOAT16 */
+
+static void
+pack_ubyte_RG_FLOAT16(const GLubyte src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[RCOMP]));
+   d[1] = _mesa_float_to_half(UBYTE_TO_FLOAT(src[GCOMP]));
+}
+
+static void
+pack_float_RG_FLOAT16(const GLfloat src[4], void *dst)
+{
+   GLhalfARB *d = ((GLhalfARB *) dst);
+   d[0] = _mesa_float_to_half(src[RCOMP]);
+   d[1] = _mesa_float_to_half(src[GCOMP]);
+}
+
+
+/* MESA_FORMAT_DUDV8 */
+
+static void
+pack_ubyte_DUDV8(const GLubyte src[4], void *dst)
+{
+   /* XXX is this ever used? */
+   GLushort *d = ((GLushort *) dst);
+   *d = PACK_COLOR_88(src[0], src[1]);
+}
+
+static void
+pack_float_DUDV8(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   GLbyte du, dv;
+   du = FLOAT_TO_BYTE(CLAMP(src[0], 0.0F, 1.0F));
+   dv = FLOAT_TO_BYTE(CLAMP(src[1], 0.0F, 1.0F));
+   *d = PACK_COLOR_88(du, dv);
+}
+
+
+/* MESA_FORMAT_RGBA_16 */
+
+static void
+pack_ubyte_RGBA_16(const GLubyte src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   d[0] = UBYTE_TO_USHORT(src[RCOMP]);
+   d[1] = UBYTE_TO_USHORT(src[GCOMP]);
+   d[2] = UBYTE_TO_USHORT(src[BCOMP]);
+   d[3] = UBYTE_TO_USHORT(src[ACOMP]);
+}
+
+static void
+pack_float_RGBA_16(const GLfloat src[4], void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   UNCLAMPED_FLOAT_TO_USHORT(d[0], src[RCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(d[1], src[GCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(d[2], src[BCOMP]);
+   UNCLAMPED_FLOAT_TO_USHORT(d[3], src[ACOMP]);
+}
+
+
+
+/*
+ * MESA_FORMAT_SIGNED_R8
+ */
+
+static void
+pack_float_SIGNED_R8(const GLfloat src[4], void *dst)
+{
+   GLbyte *d = (GLbyte *) dst;
+   *d = FLOAT_TO_BYTE(CLAMP(src[RCOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_RG88_REV
+ */
+
+static void
+pack_float_SIGNED_RG88_REV(const GLfloat src[4], void *dst)
+{
+   GLushort *d = (GLushort *) dst;
+   GLbyte r = FLOAT_TO_BYTE(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   GLbyte g = FLOAT_TO_BYTE(CLAMP(src[GCOMP], -1.0f, 1.0f));
+   *d = (g << 8) | r;
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_RGBX8888
+ */
+
+static void
+pack_float_SIGNED_RGBX8888(const GLfloat src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   GLbyte r = FLOAT_TO_BYTE(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   GLbyte g = FLOAT_TO_BYTE(CLAMP(src[GCOMP], -1.0f, 1.0f));
+   GLbyte b = FLOAT_TO_BYTE(CLAMP(src[BCOMP], -1.0f, 1.0f));
+   GLbyte a = 127;
+   *d = PACK_COLOR_8888(r, g, b, a);
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_RGBA8888
+ */
+
+static void
+pack_float_SIGNED_RGBA8888(const GLfloat src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   GLbyte r = FLOAT_TO_BYTE(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   GLbyte g = FLOAT_TO_BYTE(CLAMP(src[GCOMP], -1.0f, 1.0f));
+   GLbyte b = FLOAT_TO_BYTE(CLAMP(src[BCOMP], -1.0f, 1.0f));
+   GLbyte a = FLOAT_TO_BYTE(CLAMP(src[ACOMP], -1.0f, 1.0f));
+   *d = PACK_COLOR_8888(r, g, b, a);
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_RGBA8888_REV
+ */
+
+static void
+pack_float_SIGNED_RGBA8888_REV(const GLfloat src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   GLbyte r = FLOAT_TO_BYTE(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   GLbyte g = FLOAT_TO_BYTE(CLAMP(src[GCOMP], -1.0f, 1.0f));
+   GLbyte b = FLOAT_TO_BYTE(CLAMP(src[BCOMP], -1.0f, 1.0f));
+   GLbyte a = FLOAT_TO_BYTE(CLAMP(src[ACOMP], -1.0f, 1.0f));
+   *d = PACK_COLOR_8888(a, b, g, r);
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_R16
+ */
+
+static void
+pack_float_SIGNED_R16(const GLfloat src[4], void *dst)
+{
+   GLshort *d = (GLshort *) dst;
+   *d = FLOAT_TO_SHORT(CLAMP(src[RCOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_GR1616
+ */
+
+static void
+pack_float_SIGNED_GR1616(const GLfloat src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   GLshort r = FLOAT_TO_SHORT(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   GLshort g = FLOAT_TO_SHORT(CLAMP(src[GCOMP], -1.0f, 1.0f));
+   *d = (g << 16) | (r & 0xffff);
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_RGB_16
+ */
+
+static void
+pack_float_SIGNED_RGB_16(const GLfloat src[4], void *dst)
+{
+   GLshort *d = (GLshort *) dst;
+   d[0] = FLOAT_TO_SHORT(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   d[1] = FLOAT_TO_SHORT(CLAMP(src[GCOMP], -1.0f, 1.0f));
+   d[2] = FLOAT_TO_SHORT(CLAMP(src[BCOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_RGBA_16
+ */
+
+static void
+pack_float_SIGNED_RGBA_16(const GLfloat src[4], void *dst)
+{
+   GLshort *d = (GLshort *) dst;
+   d[0] = FLOAT_TO_SHORT(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   d[1] = FLOAT_TO_SHORT(CLAMP(src[GCOMP], -1.0f, 1.0f));
+   d[2] = FLOAT_TO_SHORT(CLAMP(src[BCOMP], -1.0f, 1.0f));
+   d[3] = FLOAT_TO_SHORT(CLAMP(src[ACOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_A8
+ */
+
+static void
+pack_float_SIGNED_A8(const GLfloat src[4], void *dst)
+{
+   GLbyte *d = (GLbyte *) dst;
+   *d = FLOAT_TO_BYTE(CLAMP(src[ACOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_L8
+ */
+
+static void
+pack_float_SIGNED_L8(const GLfloat src[4], void *dst)
+{
+   GLbyte *d = (GLbyte *) dst;
+   *d = FLOAT_TO_BYTE(CLAMP(src[RCOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_AL88
+ */
+
+static void
+pack_float_SIGNED_AL88(const GLfloat src[4], void *dst)
+{
+   GLushort *d = (GLushort *) dst;
+   GLbyte l = FLOAT_TO_BYTE(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   GLbyte a = FLOAT_TO_BYTE(CLAMP(src[ACOMP], -1.0f, 1.0f));
+   *d = (a << 8) | l;
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_A16
+ */
+
+static void
+pack_float_SIGNED_A16(const GLfloat src[4], void *dst)
+{
+   GLshort *d = (GLshort *) dst;
+   *d = FLOAT_TO_SHORT(CLAMP(src[ACOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_L16
+ */
+
+static void
+pack_float_SIGNED_L16(const GLfloat src[4], void *dst)
+{
+   GLshort *d = (GLshort *) dst;
+   *d = FLOAT_TO_SHORT(CLAMP(src[RCOMP], -1.0f, 1.0f));
+}
+
+
+/*
+ * MESA_FORMAT_SIGNED_AL1616
+ */
+
+static void
+pack_float_SIGNED_AL1616(const GLfloat src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   GLshort l = FLOAT_TO_SHORT(CLAMP(src[RCOMP], -1.0f, 1.0f));
+   GLshort a = FLOAT_TO_SHORT(CLAMP(src[ACOMP], -1.0f, 1.0f));
+   *d = PACK_COLOR_1616(a, l);
+}
+
+
+/*
+ * MESA_FORMAT_RGB9_E5_FLOAT;
+ */
+
+static void
+pack_float_RGB9_E5_FLOAT(const GLfloat src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   *d = float3_to_rgb9e5(src);
+}
+
+static void
+pack_ubyte_RGB9_E5_FLOAT(const GLubyte src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   GLfloat rgb[3];
+   rgb[0] = UBYTE_TO_FLOAT(src[RCOMP]);
+   rgb[1] = UBYTE_TO_FLOAT(src[GCOMP]);
+   rgb[2] = UBYTE_TO_FLOAT(src[BCOMP]);
+   *d = float3_to_rgb9e5(rgb);
+}
+
+
+
+/*
+ * MESA_FORMAT_R11_G11_B10_FLOAT;
+ */
+
+static void
+pack_ubyte_R11_G11_B10_FLOAT(const GLubyte src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   GLfloat rgb[3];
+   rgb[0] = UBYTE_TO_FLOAT(src[RCOMP]);
+   rgb[1] = UBYTE_TO_FLOAT(src[GCOMP]);
+   rgb[2] = UBYTE_TO_FLOAT(src[BCOMP]);
+   *d = float3_to_r11g11b10f(rgb);
+}
+
+static void
+pack_float_R11_G11_B10_FLOAT(const GLfloat src[4], void *dst)
+{
+   GLuint *d = (GLuint *) dst;
+   *d = float3_to_r11g11b10f(src);
+}
+
+
+
+/**
+ * Return a function that can pack a GLubyte rgba[4] color.
+ */
+gl_pack_ubyte_rgba_func
+_mesa_get_pack_ubyte_rgba_function(gl_format format)
+{
+   static gl_pack_ubyte_rgba_func table[MESA_FORMAT_COUNT];
+   static GLboolean initialized = GL_FALSE;
+
+   if (!initialized) {
+      memset(table, 0, sizeof(table));
+
+      table[MESA_FORMAT_NONE] = NULL;
+
+      table[MESA_FORMAT_RGBA8888] = pack_ubyte_RGBA8888;
+      table[MESA_FORMAT_RGBA8888_REV] = pack_ubyte_RGBA8888_REV;
+      table[MESA_FORMAT_ARGB8888] = pack_ubyte_ARGB8888;
+      table[MESA_FORMAT_ARGB8888_REV] = pack_ubyte_ARGB8888_REV;
+      table[MESA_FORMAT_RGBX8888] = pack_ubyte_RGBA8888; /* reused */
+      table[MESA_FORMAT_RGBX8888_REV] = pack_ubyte_RGBA8888_REV; /* reused */
+      table[MESA_FORMAT_XRGB8888] = pack_ubyte_XRGB8888;
+      table[MESA_FORMAT_XRGB8888_REV] = pack_ubyte_XRGB8888_REV;
+      table[MESA_FORMAT_RGB888] = pack_ubyte_RGB888;
+      table[MESA_FORMAT_BGR888] = pack_ubyte_BGR888;
+      table[MESA_FORMAT_RGB565] = pack_ubyte_RGB565;
+      table[MESA_FORMAT_RGB565_REV] = pack_ubyte_RGB565_REV;
+      table[MESA_FORMAT_ARGB4444] = pack_ubyte_ARGB4444;
+      table[MESA_FORMAT_ARGB4444_REV] = pack_ubyte_ARGB4444_REV;
+      table[MESA_FORMAT_RGBA5551] = pack_ubyte_RGBA5551;
+      table[MESA_FORMAT_ARGB1555] = pack_ubyte_ARGB1555;
+      table[MESA_FORMAT_ARGB1555_REV] = pack_ubyte_ARGB1555_REV;
+      table[MESA_FORMAT_AL44] = pack_ubyte_AL44;
+      table[MESA_FORMAT_AL88] = pack_ubyte_AL88;
+      table[MESA_FORMAT_AL88_REV] = pack_ubyte_AL88_REV;
+      table[MESA_FORMAT_AL1616] = pack_ubyte_AL1616;
+      table[MESA_FORMAT_AL1616_REV] = pack_ubyte_AL1616_REV;
+      table[MESA_FORMAT_RGB332] = pack_ubyte_RGB332;
+      table[MESA_FORMAT_A8] = pack_ubyte_A8;
+      table[MESA_FORMAT_A16] = pack_ubyte_A16;
+      table[MESA_FORMAT_L8] = pack_ubyte_L8;
+      table[MESA_FORMAT_L16] = pack_ubyte_L16;
+      table[MESA_FORMAT_I8] = pack_ubyte_L8; /* reuse pack_ubyte_L8 */
+      table[MESA_FORMAT_I16] = pack_ubyte_L16; /* reuse pack_ubyte_L16 */
+      table[MESA_FORMAT_YCBCR] = pack_ubyte_YCBCR;
+      table[MESA_FORMAT_YCBCR_REV] = pack_ubyte_YCBCR_REV;
+      table[MESA_FORMAT_R8] = pack_ubyte_R8;
+      table[MESA_FORMAT_GR88] = pack_ubyte_GR88;
+      table[MESA_FORMAT_RG88] = pack_ubyte_RG88;
+      table[MESA_FORMAT_R16] = pack_ubyte_R16;
+      table[MESA_FORMAT_RG1616] = pack_ubyte_RG1616;
+      table[MESA_FORMAT_RG1616_REV] = pack_ubyte_RG1616_REV;
+      table[MESA_FORMAT_ARGB2101010] = pack_ubyte_ARGB2101010;
+
+      /* should never convert RGBA to these formats */
+      table[MESA_FORMAT_Z24_S8] = NULL;
+      table[MESA_FORMAT_S8_Z24] = NULL;
+      table[MESA_FORMAT_Z16] = NULL;
+      table[MESA_FORMAT_X8_Z24] = NULL;
+      table[MESA_FORMAT_Z24_X8] = NULL;
+      table[MESA_FORMAT_Z32] = NULL;
+      table[MESA_FORMAT_S8] = NULL;
+
+      /* sRGB */
+      table[MESA_FORMAT_SRGB8] = pack_ubyte_SRGB8;
+      table[MESA_FORMAT_SRGBA8] = pack_ubyte_SRGBA8;
+      table[MESA_FORMAT_SARGB8] = pack_ubyte_SARGB8;
+      table[MESA_FORMAT_SL8] = pack_ubyte_SL8;
+      table[MESA_FORMAT_SLA8] = pack_ubyte_SLA8;
+
+      /* n/a */
+      table[MESA_FORMAT_SRGB_DXT1] = NULL; /* pack_ubyte_SRGB_DXT1; */
+      table[MESA_FORMAT_SRGBA_DXT1] = NULL; /* pack_ubyte_SRGBA_DXT1; */
+      table[MESA_FORMAT_SRGBA_DXT3] = NULL; /* pack_ubyte_SRGBA_DXT3; */
+      table[MESA_FORMAT_SRGBA_DXT5] = NULL; /* pack_ubyte_SRGBA_DXT5; */
+
+      table[MESA_FORMAT_RGB_FXT1] = NULL; /* pack_ubyte_RGB_FXT1; */
+      table[MESA_FORMAT_RGBA_FXT1] = NULL; /* pack_ubyte_RGBA_FXT1; */
+      table[MESA_FORMAT_RGB_DXT1] = NULL; /* pack_ubyte_RGB_DXT1; */
+      table[MESA_FORMAT_RGBA_DXT1] = NULL; /* pack_ubyte_RGBA_DXT1; */
+      table[MESA_FORMAT_RGBA_DXT3] = NULL; /* pack_ubyte_RGBA_DXT3; */
+      table[MESA_FORMAT_RGBA_DXT5] = NULL; /* pack_ubyte_RGBA_DXT5; */
+
+      table[MESA_FORMAT_RGBA_FLOAT32] = pack_ubyte_RGBA_FLOAT32;
+      table[MESA_FORMAT_RGBA_FLOAT16] = pack_ubyte_RGBA_FLOAT16;
+      table[MESA_FORMAT_RGB_FLOAT32] = pack_ubyte_RGB_FLOAT32;
+      table[MESA_FORMAT_RGB_FLOAT16] = pack_ubyte_RGB_FLOAT16;
+      table[MESA_FORMAT_ALPHA_FLOAT32] = pack_ubyte_ALPHA_FLOAT32;
+      table[MESA_FORMAT_ALPHA_FLOAT16] = pack_ubyte_ALPHA_FLOAT16;
+      table[MESA_FORMAT_LUMINANCE_FLOAT32] = pack_ubyte_LUMINANCE_FLOAT32;
+      table[MESA_FORMAT_LUMINANCE_FLOAT16] = pack_ubyte_LUMINANCE_FLOAT16;
+      table[MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32] = pack_ubyte_LUMINANCE_ALPHA_FLOAT32;
+      table[MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16] = pack_ubyte_LUMINANCE_ALPHA_FLOAT16;
+      table[MESA_FORMAT_INTENSITY_FLOAT32] = pack_ubyte_LUMINANCE_FLOAT32;
+      table[MESA_FORMAT_INTENSITY_FLOAT16] = pack_ubyte_LUMINANCE_FLOAT16;
+      table[MESA_FORMAT_R_FLOAT32] = pack_ubyte_LUMINANCE_FLOAT32;
+      table[MESA_FORMAT_R_FLOAT16] = pack_ubyte_LUMINANCE_FLOAT16;
+      table[MESA_FORMAT_RG_FLOAT32] = pack_ubyte_RG_FLOAT32;
+      table[MESA_FORMAT_RG_FLOAT16] = pack_ubyte_RG_FLOAT16;
+
+      /* n/a */
+      table[MESA_FORMAT_RGBA_INT8] = NULL; /* pack_ubyte_RGBA_INT8 */
+      table[MESA_FORMAT_RGBA_INT16] = NULL; /* pack_ubyte_RGBA_INT16 */
+      table[MESA_FORMAT_RGBA_INT32] = NULL; /* pack_ubyte_RGBA_INT32 */
+      table[MESA_FORMAT_RGBA_UINT8] = NULL; /* pack_ubyte_RGBA_UINT8 */
+      table[MESA_FORMAT_RGBA_UINT16] = NULL; /* pack_ubyte_RGBA_UINT16 */
+      table[MESA_FORMAT_RGBA_UINT32] = NULL; /* pack_ubyte_RGBA_UINT32 */
+
+      table[MESA_FORMAT_DUDV8] = pack_ubyte_DUDV8;
+
+      table[MESA_FORMAT_RGBA_16] = pack_ubyte_RGBA_16;
+
+      /* n/a */
+      table[MESA_FORMAT_SIGNED_R8] = NULL;
+      table[MESA_FORMAT_SIGNED_RG88_REV] = NULL;
+      table[MESA_FORMAT_SIGNED_RGBX8888] = NULL;
+      table[MESA_FORMAT_SIGNED_RGBA8888] = NULL;
+      table[MESA_FORMAT_SIGNED_RGBA8888_REV] = NULL;
+      table[MESA_FORMAT_SIGNED_R16] = NULL;
+      table[MESA_FORMAT_SIGNED_GR1616] = NULL;
+      table[MESA_FORMAT_SIGNED_RGB_16] = NULL;
+      table[MESA_FORMAT_SIGNED_RGBA_16] = NULL;
+      table[MESA_FORMAT_SIGNED_A8] = NULL;
+      table[MESA_FORMAT_SIGNED_L8] = NULL;
+      table[MESA_FORMAT_SIGNED_AL88] = NULL;
+      table[MESA_FORMAT_SIGNED_I8] = NULL;
+      table[MESA_FORMAT_SIGNED_A16] = NULL;
+      table[MESA_FORMAT_SIGNED_L16] = NULL;
+      table[MESA_FORMAT_SIGNED_AL1616] = NULL;
+      table[MESA_FORMAT_SIGNED_I16] = NULL;
+
+
+      table[MESA_FORMAT_RGBA_16] = pack_ubyte_RGBA_16;
+
+      table[MESA_FORMAT_RGB9_E5_FLOAT] = pack_ubyte_RGB9_E5_FLOAT;
+      table[MESA_FORMAT_R11_G11_B10_FLOAT] = pack_ubyte_R11_G11_B10_FLOAT;
+
+      initialized = GL_TRUE;
+   }
+
+   return table[format];
+}
+
+
+
+/**
+ * Return a function that can pack a GLfloat rgba[4] color.
+ */
+gl_pack_float_rgba_func
+_mesa_get_pack_float_rgba_function(gl_format format)
+{
+   static gl_pack_float_rgba_func table[MESA_FORMAT_COUNT];
+   static GLboolean initialized = GL_FALSE;
+
+   if (!initialized) {
+      memset(table, 0, sizeof(table));
+
+      table[MESA_FORMAT_NONE] = NULL;
+
+      table[MESA_FORMAT_RGBA8888] = pack_float_RGBA8888;
+      table[MESA_FORMAT_RGBA8888_REV] = pack_float_RGBA8888_REV;
+      table[MESA_FORMAT_ARGB8888] = pack_float_ARGB8888;
+      table[MESA_FORMAT_ARGB8888_REV] = pack_float_ARGB8888_REV;
+      table[MESA_FORMAT_RGBX8888] = pack_float_RGBA8888; /* reused */
+      table[MESA_FORMAT_RGBX8888_REV] = pack_float_RGBA8888_REV; /* reused */
+      table[MESA_FORMAT_XRGB8888] = pack_float_XRGB8888;
+      table[MESA_FORMAT_XRGB8888_REV] = pack_float_XRGB8888_REV;
+      table[MESA_FORMAT_RGB888] = pack_float_RGB888;
+      table[MESA_FORMAT_BGR888] = pack_float_BGR888;
+      table[MESA_FORMAT_RGB565] = pack_float_RGB565;
+      table[MESA_FORMAT_RGB565_REV] = pack_float_RGB565_REV;
+      table[MESA_FORMAT_ARGB4444] = pack_float_ARGB4444;
+      table[MESA_FORMAT_ARGB4444_REV] = pack_float_ARGB4444_REV;
+      table[MESA_FORMAT_RGBA5551] = pack_float_RGBA5551;
+      table[MESA_FORMAT_ARGB1555] = pack_float_ARGB1555;
+      table[MESA_FORMAT_ARGB1555_REV] = pack_float_ARGB1555_REV;
+
+      table[MESA_FORMAT_AL44] = pack_float_AL44;
+      table[MESA_FORMAT_AL88] = pack_float_AL88;
+      table[MESA_FORMAT_AL88_REV] = pack_float_AL88_REV;
+      table[MESA_FORMAT_AL1616] = pack_float_AL1616;
+      table[MESA_FORMAT_AL1616_REV] = pack_float_AL1616_REV;
+      table[MESA_FORMAT_RGB332] = pack_float_RGB332;
+      table[MESA_FORMAT_A8] = pack_float_A8;
+      table[MESA_FORMAT_A16] = pack_float_A16;
+      table[MESA_FORMAT_L8] = pack_float_L8;
+      table[MESA_FORMAT_L16] = pack_float_L16;
+      table[MESA_FORMAT_I8] = pack_float_L8; /* reuse pack_float_L8 */
+      table[MESA_FORMAT_I16] = pack_float_L16; /* reuse pack_float_L16 */
+      table[MESA_FORMAT_YCBCR] = pack_float_YCBCR;
+      table[MESA_FORMAT_YCBCR_REV] = pack_float_YCBCR_REV;
+      table[MESA_FORMAT_R8] = pack_float_R8;
+      table[MESA_FORMAT_GR88] = pack_float_GR88;
+      table[MESA_FORMAT_RG88] = pack_float_RG88;
+      table[MESA_FORMAT_R16] = pack_float_R16;
+      table[MESA_FORMAT_RG1616] = pack_float_RG1616;
+      table[MESA_FORMAT_RG1616_REV] = pack_float_RG1616_REV;
+      table[MESA_FORMAT_ARGB2101010] = pack_float_ARGB2101010;
+
+      /* should never convert RGBA to these formats */
+      table[MESA_FORMAT_Z24_S8] = NULL;
+      table[MESA_FORMAT_S8_Z24] = NULL;
+      table[MESA_FORMAT_Z16] = NULL;
+      table[MESA_FORMAT_X8_Z24] = NULL;
+      table[MESA_FORMAT_Z24_X8] = NULL;
+      table[MESA_FORMAT_Z32] = NULL;
+      table[MESA_FORMAT_S8] = NULL;
+
+      table[MESA_FORMAT_SRGB8] = pack_float_SRGB8;
+      table[MESA_FORMAT_SRGBA8] = pack_float_SRGBA8;
+      table[MESA_FORMAT_SARGB8] = pack_float_SARGB8;
+      table[MESA_FORMAT_SL8] = pack_float_SL8;
+      table[MESA_FORMAT_SLA8] = pack_float_SLA8;
+
+      /* n/a */
+      table[MESA_FORMAT_SRGB_DXT1] = NULL;
+      table[MESA_FORMAT_SRGBA_DXT1] = NULL;
+      table[MESA_FORMAT_SRGBA_DXT3] = NULL;
+      table[MESA_FORMAT_SRGBA_DXT5] = NULL;
+
+      table[MESA_FORMAT_RGB_FXT1] = NULL;
+      table[MESA_FORMAT_RGBA_FXT1] = NULL;
+      table[MESA_FORMAT_RGB_DXT1] = NULL;
+      table[MESA_FORMAT_RGBA_DXT1] = NULL;
+      table[MESA_FORMAT_RGBA_DXT3] = NULL;
+      table[MESA_FORMAT_RGBA_DXT5] = NULL;
+
+      table[MESA_FORMAT_RGBA_FLOAT32] = pack_float_RGBA_FLOAT32;
+      table[MESA_FORMAT_RGBA_FLOAT16] = pack_float_RGBA_FLOAT16;
+      table[MESA_FORMAT_RGB_FLOAT32] = pack_float_RGB_FLOAT32;
+      table[MESA_FORMAT_RGB_FLOAT16] = pack_float_RGB_FLOAT16;
+      table[MESA_FORMAT_ALPHA_FLOAT32] = pack_float_ALPHA_FLOAT32;
+      table[MESA_FORMAT_ALPHA_FLOAT16] = pack_float_ALPHA_FLOAT16;
+      table[MESA_FORMAT_LUMINANCE_FLOAT32] = pack_float_LUMINANCE_FLOAT32;
+      table[MESA_FORMAT_LUMINANCE_FLOAT16] = pack_float_LUMINANCE_FLOAT16;
+      table[MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32] = pack_float_LUMINANCE_ALPHA_FLOAT32;
+      table[MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16] = pack_float_LUMINANCE_ALPHA_FLOAT16;
+
+      table[MESA_FORMAT_INTENSITY_FLOAT32] = pack_float_LUMINANCE_FLOAT32;
+      table[MESA_FORMAT_INTENSITY_FLOAT16] = pack_float_LUMINANCE_FLOAT16;
+      table[MESA_FORMAT_R_FLOAT32] = pack_float_LUMINANCE_FLOAT32;
+      table[MESA_FORMAT_R_FLOAT16] = pack_float_LUMINANCE_FLOAT16;
+      table[MESA_FORMAT_RG_FLOAT32] = pack_float_RG_FLOAT32;
+      table[MESA_FORMAT_RG_FLOAT16] = pack_float_RG_FLOAT16;
+
+      /* n/a */
+      table[MESA_FORMAT_RGBA_INT8] = NULL;
+      table[MESA_FORMAT_RGBA_INT16] = NULL;
+      table[MESA_FORMAT_RGBA_INT32] = NULL;
+      table[MESA_FORMAT_RGBA_UINT8] = NULL;
+      table[MESA_FORMAT_RGBA_UINT16] = NULL;
+      table[MESA_FORMAT_RGBA_UINT32] = NULL;
+
+      table[MESA_FORMAT_DUDV8] = pack_float_DUDV8;
+
+      table[MESA_FORMAT_RGBA_16] = pack_float_RGBA_16;
+
+      table[MESA_FORMAT_SIGNED_R8] = pack_float_SIGNED_R8;
+      table[MESA_FORMAT_SIGNED_RG88_REV] = pack_float_SIGNED_RG88_REV;
+      table[MESA_FORMAT_SIGNED_RGBX8888] = pack_float_SIGNED_RGBX8888;
+      table[MESA_FORMAT_SIGNED_RGBA8888] = pack_float_SIGNED_RGBA8888;
+      table[MESA_FORMAT_SIGNED_RGBA8888_REV] = pack_float_SIGNED_RGBA8888_REV;
+      table[MESA_FORMAT_SIGNED_R16] = pack_float_SIGNED_R16;
+      table[MESA_FORMAT_SIGNED_GR1616] = pack_float_SIGNED_GR1616;
+      table[MESA_FORMAT_SIGNED_RGB_16] = pack_float_SIGNED_RGB_16;
+      table[MESA_FORMAT_SIGNED_RGBA_16] = pack_float_SIGNED_RGBA_16;
+      table[MESA_FORMAT_SIGNED_A8] = pack_float_SIGNED_A8;
+      table[MESA_FORMAT_SIGNED_L8] = pack_float_SIGNED_L8;
+      table[MESA_FORMAT_SIGNED_AL88] = pack_float_SIGNED_AL88;
+      table[MESA_FORMAT_SIGNED_I8] = pack_float_SIGNED_L8; /* reused */
+      table[MESA_FORMAT_SIGNED_A16] = pack_float_SIGNED_A16;
+      table[MESA_FORMAT_SIGNED_L16] = pack_float_SIGNED_L16;
+      table[MESA_FORMAT_SIGNED_AL1616] = pack_float_SIGNED_AL1616;
+      table[MESA_FORMAT_SIGNED_I16] = pack_float_SIGNED_L16; /* reused */
+
+      table[MESA_FORMAT_RGB9_E5_FLOAT] = pack_float_RGB9_E5_FLOAT;
+      table[MESA_FORMAT_R11_G11_B10_FLOAT] = pack_float_R11_G11_B10_FLOAT;
+
+      initialized = GL_TRUE;
+   }
+
+   return table[format];
+}
+
+
+
+static pack_float_rgba_row_func
+get_pack_float_rgba_row_function(gl_format format)
+{
+   static pack_float_rgba_row_func table[MESA_FORMAT_COUNT];
+   static GLboolean initialized = GL_FALSE;
+
+   if (!initialized) {
+      /* We don't need a special row packing function for each format.
+       * There's a generic fallback which uses a per-pixel packing function.
+       */
+      memset(table, 0, sizeof(table));
+
+      table[MESA_FORMAT_RGBA8888] = pack_row_float_RGBA8888;
+      table[MESA_FORMAT_RGBA8888_REV] = pack_row_float_RGBA8888_REV;
+      table[MESA_FORMAT_ARGB8888] = pack_row_float_ARGB8888;
+      table[MESA_FORMAT_ARGB8888_REV] = pack_row_float_ARGB8888_REV;
+      table[MESA_FORMAT_RGBX8888] = pack_row_float_RGBA8888; /* reused */
+      table[MESA_FORMAT_RGBX8888_REV] = pack_row_float_RGBA8888_REV; /* reused */
+      table[MESA_FORMAT_XRGB8888] = pack_row_float_XRGB8888;
+      table[MESA_FORMAT_XRGB8888_REV] = pack_row_float_XRGB8888_REV;
+      table[MESA_FORMAT_RGB888] = pack_row_float_RGB888;
+      table[MESA_FORMAT_BGR888] = pack_row_float_BGR888;
+      table[MESA_FORMAT_RGB565] = pack_row_float_RGB565;
+      table[MESA_FORMAT_RGB565_REV] = pack_row_float_RGB565_REV;
+
+      initialized = GL_TRUE;
+   }
+
+   return table[format];
+}
+
+
+
+static pack_ubyte_rgba_row_func
+get_pack_ubyte_rgba_row_function(gl_format format)
+{
+   static pack_ubyte_rgba_row_func table[MESA_FORMAT_COUNT];
+   static GLboolean initialized = GL_FALSE;
+
+   if (!initialized) {
+      /* We don't need a special row packing function for each format.
+       * There's a generic fallback which uses a per-pixel packing function.
+       */
+      memset(table, 0, sizeof(table));
+
+      table[MESA_FORMAT_RGBA8888] = pack_row_ubyte_RGBA8888;
+      table[MESA_FORMAT_RGBA8888_REV] = pack_row_ubyte_RGBA8888_REV;
+      table[MESA_FORMAT_ARGB8888] = pack_row_ubyte_ARGB8888;
+      table[MESA_FORMAT_ARGB8888_REV] = pack_row_ubyte_ARGB8888_REV;
+      table[MESA_FORMAT_RGBX8888] = pack_row_ubyte_RGBA8888; /* reused */
+      table[MESA_FORMAT_RGBX8888_REV] = pack_row_ubyte_RGBA8888_REV; /* reused */
+      table[MESA_FORMAT_XRGB8888] = pack_row_ubyte_XRGB8888;
+      table[MESA_FORMAT_XRGB8888_REV] = pack_row_ubyte_XRGB8888_REV;
+      table[MESA_FORMAT_RGB888] = pack_row_ubyte_RGB888;
+      table[MESA_FORMAT_BGR888] = pack_row_ubyte_BGR888;
+      table[MESA_FORMAT_RGB565] = pack_row_ubyte_RGB565;
+      table[MESA_FORMAT_RGB565_REV] = pack_row_ubyte_RGB565_REV;
+
+      initialized = GL_TRUE;
+   }
+
+   return table[format];
+}
+
+
+
+/**
+ * Pack a row of GLfloat rgba[4] values to the destination.
+ */
+void
+_mesa_pack_float_rgba_row(gl_format format, GLuint n,
+                          const GLfloat src[][4], void *dst)
+{
+   pack_float_rgba_row_func packrow = get_pack_float_rgba_row_function(format);
+   if (packrow) {
+      /* use "fast" function */
+      packrow(n, src, dst);
+   }
+   else {
+      /* slower fallback */
+      gl_pack_float_rgba_func pack = _mesa_get_pack_float_rgba_function(format);
+      GLuint dstStride = _mesa_get_format_bytes(format);
+      GLubyte *dstPtr = (GLubyte *) dst;
+      GLuint i;
+
+      assert(pack);
+      if (!pack)
+         return;
+
+      for (i = 0; i < n; i++) {
+         pack(src[i], dstPtr);
+         dstPtr += dstStride;
+      }
+   }
+}
+
+
+/**
+ * Pack a row of GLubyte rgba[4] values to the destination.
+ */
+void
+_mesa_pack_ubyte_rgba_row(gl_format format, GLuint n,
+                          const GLubyte src[][4], void *dst)
+{
+   pack_ubyte_rgba_row_func packrow = get_pack_ubyte_rgba_row_function(format);
+   if (packrow) {
+      /* use "fast" function */
+      packrow(n, src, dst);
+   }
+   else {
+      /* slower fallback */
+      gl_pack_ubyte_rgba_func pack = _mesa_get_pack_ubyte_rgba_function(format);
+      const GLuint stride = _mesa_get_format_bytes(format);
+      GLubyte *d = ((GLubyte *) dst);
+      GLuint i;
+
+      assert(pack);
+      if (!pack)
+         return;
+
+      for (i = 0; i < n; i++) {
+         pack(src[i], d);
+         d += stride;
+      }
+   }
+}
+
+
+/**
+ ** Pack float Z pixels
+ **/
+
+static void
+pack_float_z_Z24_S8(const GLfloat *src, void *dst)
+{
+   /* don't disturb the stencil values */
+   GLuint *d = ((GLuint *) dst);
+   const GLfloat scale = (GLfloat) 0xffffff;
+   GLuint s = *d & 0xff;
+   GLuint z = (GLuint) (*src * scale);
+   assert(z <= 0xffffff);
+   *d = (z << 8) | s;
+}
+
+static void
+pack_float_z_S8_Z24(const GLfloat *src, void *dst)
+{
+   /* don't disturb the stencil values */
+   GLuint *d = ((GLuint *) dst);
+   const GLfloat scale = (GLfloat) 0xffffff;
+   GLuint s = *d & 0xff000000;
+   GLuint z = (GLuint) (*src * scale);
+   assert(z <= 0xffffff);
+   *d = s | z;
+}
+
+static void
+pack_float_z_Z16(const GLfloat *src, void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   const GLfloat scale = (GLfloat) 0xffff;
+   *d = (GLushort) (*src * scale);
+}
+
+static void
+pack_float_z_Z32(const GLfloat *src, void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   const GLfloat scale = (GLfloat) 0xffffffff;
+   *d = (GLuint) (*src * scale);
+}
+
+static void
+pack_float_z_Z32_FLOAT(const GLfloat *src, void *dst)
+{
+   GLfloat *d = (GLfloat *) dst;
+   *d = *src;
+}
+
+gl_pack_float_z_func
+_mesa_get_pack_float_z_func(gl_format format)
+{
+   switch (format) {
+   case MESA_FORMAT_Z24_S8:
+   case MESA_FORMAT_Z24_X8:
+      return pack_float_z_Z24_S8;
+   case MESA_FORMAT_S8_Z24:
+   case MESA_FORMAT_X8_Z24:
+      return pack_float_z_S8_Z24;
+   case MESA_FORMAT_Z16:
+      return pack_float_z_Z16;
+   case MESA_FORMAT_Z32:
+      return pack_float_z_Z32;
+   case MESA_FORMAT_Z32_FLOAT:
+   case MESA_FORMAT_Z32_FLOAT_X24S8:
+      return pack_float_z_Z32_FLOAT;
+   default:
+      _mesa_problem(NULL,
+                    "unexpected format in _mesa_get_pack_float_z_func()");
+      return NULL;
+   }
+}
+
+
+
+/**
+ ** Pack uint Z pixels.  The incoming src value is always in
+ ** the range [0, 2^32-1].
+ **/
+
+static void
+pack_uint_z_Z24_S8(const GLuint *src, void *dst)
+{
+   /* don't disturb the stencil values */
+   GLuint *d = ((GLuint *) dst);
+   GLuint s = *d & 0xff;
+   GLuint z = *src & 0xffffff00;
+   *d = z | s;
+}
+
+static void
+pack_uint_z_S8_Z24(const GLuint *src, void *dst)
+{
+   /* don't disturb the stencil values */
+   GLuint *d = ((GLuint *) dst);
+   GLuint s = *d & 0xff000000;
+   GLuint z = *src >> 8;
+   *d = s | z;
+}
+
+static void
+pack_uint_z_Z16(const GLuint *src, void *dst)
+{
+   GLushort *d = ((GLushort *) dst);
+   *d = *src >> 16;
+}
+
+static void
+pack_uint_z_Z32(const GLuint *src, void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   *d = *src;
+}
+
+static void
+pack_uint_z_Z32_FLOAT(const GLuint *src, void *dst)
+{
+   GLuint *d = ((GLuint *) dst);
+   const GLfloat scale = 1.0f / (GLfloat) 0xffffffff;
+   *d = *src * scale;
+   assert(*d >= 0.0f);
+   assert(*d <= 1.0f);
+}
+
+static void
+pack_uint_z_Z32_FLOAT_X24S8(const GLuint *src, void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   const GLfloat scale = 1.0f / (GLfloat) 0xffffffff;
+   *d = *src * scale;
+   assert(*d >= 0.0f);
+   assert(*d <= 1.0f);
+}
+
+gl_pack_uint_z_func
+_mesa_get_pack_uint_z_func(gl_format format)
+{
+   switch (format) {
+   case MESA_FORMAT_Z24_S8:
+   case MESA_FORMAT_Z24_X8:
+      return pack_uint_z_Z24_S8;
+   case MESA_FORMAT_S8_Z24:
+   case MESA_FORMAT_X8_Z24:
+      return pack_uint_z_S8_Z24;
+   case MESA_FORMAT_Z16:
+      return pack_uint_z_Z16;
+   case MESA_FORMAT_Z32:
+      return pack_uint_z_Z32;
+   case MESA_FORMAT_Z32_FLOAT:
+      return pack_uint_z_Z32_FLOAT;
+   case MESA_FORMAT_Z32_FLOAT_X24S8:
+      return pack_uint_z_Z32_FLOAT_X24S8;
+   default:
+      _mesa_problem(NULL, "unexpected format in _mesa_get_pack_uint_z_func()");
+      return NULL;
+   }
+}
+
+
+/**
+ ** Pack ubyte stencil pixels
+ **/
+
+static void
+pack_ubyte_stencil_Z24_S8(const GLubyte *src, void *dst)
+{
+   /* don't disturb the Z values */
+   GLuint *d = ((GLuint *) dst);
+   GLuint s = *src;
+   GLuint z = *d & 0xffffff00;
+   *d = z | s;
+}
+
+static void
+pack_ubyte_stencil_S8_Z24(const GLubyte *src, void *dst)
+{
+   /* don't disturb the Z values */
+   GLuint *d = ((GLuint *) dst);
+   GLuint s = *src << 24;
+   GLuint z = *d & 0xffffff;
+   *d = s | z;
+}
+
+static void
+pack_ubyte_stencil_S8(const GLubyte *src, void *dst)
+{
+   GLubyte *d = (GLubyte *) dst;
+   *d = *src;
+}
+
+static void
+pack_ubyte_stencil_Z32_FLOAT_X24S8(const GLubyte *src, void *dst)
+{
+   GLfloat *d = ((GLfloat *) dst);
+   d[1] = *src;
+}
+
+
+gl_pack_ubyte_stencil_func
+_mesa_get_pack_ubyte_stencil_func(gl_format format)
+{
+   switch (format) {
+   case MESA_FORMAT_Z24_S8:
+      return pack_ubyte_stencil_Z24_S8;
+   case MESA_FORMAT_S8_Z24:
+      return pack_ubyte_stencil_S8_Z24;
+   case MESA_FORMAT_S8:
+      return pack_ubyte_stencil_S8;
+   case MESA_FORMAT_Z32_FLOAT_X24S8:
+      return pack_ubyte_stencil_Z32_FLOAT_X24S8;
+   default:
+      _mesa_problem(NULL,
+                    "unexpected format in _mesa_pack_ubyte_stencil_func()");
+      return NULL;
+   }
+}
+
+
+
+void
+_mesa_pack_float_z_row(gl_format format, GLuint n,
+                       const GLfloat *src, void *dst)
+{
+   switch (format) {
+   case MESA_FORMAT_Z24_S8:
+   case MESA_FORMAT_Z24_X8:
+      {
+         /* don't disturb the stencil values */
+         GLuint *d = ((GLuint *) dst);
+         const GLfloat scale = (GLfloat) 0xffffff;
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            GLuint s = d[i] & 0xff;
+            GLuint z = (GLuint) (src[i] * scale);
+            assert(z <= 0xffffff);
+            d[i] = (z << 8) | s;
+         }
+      }
+      break;
+   case MESA_FORMAT_S8_Z24:
+   case MESA_FORMAT_X8_Z24:
+      {
+         /* don't disturb the stencil values */
+         GLuint *d = ((GLuint *) dst);
+         const GLfloat scale = (GLfloat) 0xffffff;
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            GLuint s = d[i] & 0xff000000;
+            GLuint z = (GLuint) (src[i] * scale);
+            assert(z <= 0xffffff);
+            d[i] = s | z;
+         }
+      }
+      break;
+   case MESA_FORMAT_Z16:
+      {
+         GLushort *d = ((GLushort *) dst);
+         const GLfloat scale = (GLfloat) 0xffff;
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            d[i] = (GLushort) (src[i] * scale);
+         }
+      }
+      break;
+   case MESA_FORMAT_Z32:
+      {
+         GLuint *d = ((GLuint *) dst);
+         const GLfloat scale = (GLfloat) 0xffffffff;
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            d[i] = (GLuint) (src[i] * scale);
+         }
+      }
+      break;
+   case MESA_FORMAT_Z32_FLOAT:
+      memcpy(dst, src, n * sizeof(GLfloat));
+      break;
+   case MESA_FORMAT_Z32_FLOAT_X24S8:
+      {
+         GLfloat *d = ((GLfloat *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            d[i * 2] = src[i];
+         }
+      }
+      break;
+   default:
+      _mesa_problem(NULL, "unexpected format in _mesa_pack_float_z_row()");
+   }
+}
+
+
+/**
+ * The incoming Z values are always in the range [0, 0xffffffff].
+ */
+void
+_mesa_pack_uint_z_row(gl_format format, GLuint n,
+                      const GLuint *src, void *dst)
+{
+   switch (format) {
+   case MESA_FORMAT_Z24_S8:
+   case MESA_FORMAT_Z24_X8:
+      {
+         /* don't disturb the stencil values */
+         GLuint *d = ((GLuint *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            GLuint s = d[i] & 0xff;
+            GLuint z = src[i] & 0xffffff00;
+            d[i] = z | s;
+         }
+      }
+      break;
+   case MESA_FORMAT_S8_Z24:
+   case MESA_FORMAT_X8_Z24:
+      {
+         /* don't disturb the stencil values */
+         GLuint *d = ((GLuint *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            GLuint s = d[i] & 0xff000000;
+            GLuint z = src[i] >> 8;
+            d[i] = s | z;
+         }
+      }
+      break;
+   case MESA_FORMAT_Z16:
+      {
+         GLushort *d = ((GLushort *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            d[i] = src[i] >> 16;
+         }
+      }
+      break;
+   case MESA_FORMAT_Z32:
+      memcpy(dst, src, n * sizeof(GLfloat));
+      break;
+   case MESA_FORMAT_Z32_FLOAT:
+      {
+         GLuint *d = ((GLuint *) dst);
+         const GLfloat scale = 1.0f / (GLfloat) 0xffffffff;
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            d[i] = src[i] * scale;
+            assert(d[i] >= 0.0f);
+            assert(d[i] <= 1.0f);
+         }
+      }
+      break;
+   case MESA_FORMAT_Z32_FLOAT_X24S8:
+      {
+         GLfloat *d = ((GLfloat *) dst);
+         const GLfloat scale = 1.0f / (GLfloat) 0xffffffff;
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            d[i * 2] = src[i] * scale;
+            assert(d[i * 2] >= 0.0f);
+            assert(d[i * 2] <= 1.0f);
+         }
+      }
+      break;
+   default:
+      _mesa_problem(NULL, "unexpected format in _mesa_pack_uint_z_row()");
+   }
+}
+
+
+void
+_mesa_pack_ubyte_stencil_row(gl_format format, GLuint n,
+                             const GLubyte *src, void *dst)
+{
+   switch (format) {
+   case MESA_FORMAT_Z24_S8:
+      {
+         /* don't disturb the Z values */
+         GLuint *d = ((GLuint *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            GLuint s = src[i];
+            GLuint z = d[i] & 0xffffff00;
+            d[i] = z | s;
+         }
+      }
+      break;
+   case MESA_FORMAT_S8_Z24:
+      {
+         /* don't disturb the Z values */
+         GLuint *d = ((GLuint *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            GLuint s = src[i] << 24;
+            GLuint z = d[i] & 0xffffff;
+            d[i] = s | z;
+         }
+      }
+      break;
+   case MESA_FORMAT_S8:
+      memcpy(dst, src, n * sizeof(GLubyte));
+      break;
+   case MESA_FORMAT_Z32_FLOAT_X24S8:
+      {
+         GLfloat *d = ((GLfloat *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            d[i * 2 + 1] = src[i];
+         }
+      }
+      break;
+   default:
+      _mesa_problem(NULL, "unexpected format in _mesa_pack_ubyte_stencil_row()");
+   }
+}
+
+
+/**
+ * Incoming Z/stencil values are always in uint_24_8 format.
+ */
+void
+_mesa_pack_uint_24_8_depth_stencil_row(gl_format format, GLuint n,
+                                       const GLuint *src, void *dst)
+{
+   switch (format) {
+   case MESA_FORMAT_Z24_S8:
+      memcpy(dst, src, n * sizeof(GLuint));
+      break;
+   case MESA_FORMAT_S8_Z24:
+      {
+         GLuint *d = ((GLuint *) dst);
+         GLuint i;
+         for (i = 0; i < n; i++) {
+            GLuint s = src[i] << 24;
+            GLuint z = src[i] >> 8;
+            d[i] = s | z;
+         }
+      }
+      break;
+   default:
+      _mesa_problem(NULL, "bad format %s in _mesa_pack_ubyte_s_row",
+                    _mesa_get_format_name(format));
+      return;
+   }
+}
diff --git a/src/mesa/main/format_pack.h b/src/mesa/main/format_pack.h
new file mode 100644
index 0000000000..7df1356321
--- /dev/null
+++ b/src/mesa/main/format_pack.h
@@ -0,0 +1,98 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (c) 2011 VMware, Inc.
+ *
+ * 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 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 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.
+ */
+
+
+#ifndef FORMAT_PACK_H
+#define FORMAT_PACK_H
+
+
+#include "formats.h"
+
+
+/** Pack a GLubyte rgba[4] color to dest address */
+typedef void (*gl_pack_ubyte_rgba_func)(const GLubyte src[4], void *dst);
+
+/** Pack a GLfloat rgba[4] color to dest address */
+typedef void (*gl_pack_float_rgba_func)(const GLfloat src[4], void *dst);
+
+/** Pack a GLfloat Z value to dest address */
+typedef void (*gl_pack_float_z_func)(const GLfloat *src, void *dst);
+
+/** Pack a GLuint Z value to dest address */
+typedef void (*gl_pack_uint_z_func)(const GLuint *src, void *dst);
+
+/** Pack a GLubyte stencil value to dest address */
+typedef void (*gl_pack_ubyte_stencil_func)(const GLubyte *src, void *dst);
+
+
+
+
+extern gl_pack_ubyte_rgba_func
+_mesa_get_pack_ubyte_rgba_function(gl_format format);
+
+
+extern gl_pack_float_rgba_func
+_mesa_get_pack_float_rgba_function(gl_format format);
+
+
+extern gl_pack_float_z_func
+_mesa_get_pack_float_z_func(gl_format format);
+
+
+extern gl_pack_uint_z_func
+_mesa_get_pack_uint_z_func(gl_format format);
+
+
+extern gl_pack_ubyte_stencil_func
+_mesa_get_pack_ubyte_stencil_func(gl_format format);
+
+
+
+extern void
+_mesa_pack_float_rgba_row(gl_format format, GLuint n,
+                          const GLfloat src[][4], void *dst);
+
+extern void
+_mesa_pack_ubyte_rgba_row(gl_format format, GLuint n,
+                          const GLubyte src[][4], void *dst);
+
+
+
+extern void
+_mesa_pack_float_z_row(gl_format format, GLuint n,
+                       const GLfloat *src, void *dst);
+
+extern void
+_mesa_pack_uint_z_row(gl_format format, GLuint n,
+                      const GLuint *src, void *dst);
+
+extern void
+_mesa_pack_ubyte_stencil_row(gl_format format, GLuint n,
+                             const GLubyte *src, void *dst);
+
+extern void
+_mesa_pack_uint_24_8_depth_stencil_row(gl_format format, GLuint n,
+                                       const GLuint *src, void *dst);
+
+
+#endif
diff --git a/src/mesa/sources.mak b/src/mesa/sources.mak
index 1f109fb36c..cd18f46ea1 100644
--- a/src/mesa/sources.mak
+++ b/src/mesa/sources.mak
@@ -42,6 +42,7 @@ MAIN_SOURCES = \
 	main/ffvertex_prog.c \
 	main/fog.c \
 	main/formats.c \
+	main/format_pack.c \
 	main/format_unpack.c \
 	main/framebuffer.c \
 	main/get.c \