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diff --git a/src/gallium/auxiliary/util/u_pack_color.h b/src/gallium/auxiliary/util/u_pack_color.h
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+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Functions to produce packed colors/Z from floats.
+ */
+
+
+#ifndef U_PACK_COLOR_H
+#define U_PACK_COLOR_H
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_format.h"
+#include "util/u_math.h"
+
+
+/**
+ * Pack ubyte R,G,B,A into dest pixel.
+ */
+static INLINE void
+util_pack_color_ub(ubyte r, ubyte g, ubyte b, ubyte a,
+ enum pipe_format format, void *dest)
+{
+ switch (format) {
+ case PIPE_FORMAT_R8G8B8A8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (r << 24) | (g << 16) | (b << 8) | a;
+ }
+ return;
+ case PIPE_FORMAT_R8G8B8X8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (r << 24) | (g << 16) | (b << 8) | 0xff;
+ }
+ return;
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (a << 24) | (r << 16) | (g << 8) | b;
+ }
+ return;
+ case PIPE_FORMAT_X8R8G8B8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (0xff << 24) | (r << 16) | (g << 8) | b;
+ }
+ return;
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (b << 24) | (g << 16) | (r << 8) | a;
+ }
+ return;
+ case PIPE_FORMAT_B8G8R8X8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (b << 24) | (g << 16) | (r << 8) | 0xff;
+ }
+ return;
+ case PIPE_FORMAT_R5G6B5_UNORM:
+ {
+ ushort *d = (ushort *) dest;
+ *d = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3);
+ }
+ return;
+ case PIPE_FORMAT_A1R5G5B5_UNORM:
+ {
+ ushort *d = (ushort *) dest;
+ *d = ((a & 0x80) << 8) | ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | (b >> 3);
+ }
+ return;
+ case PIPE_FORMAT_A4R4G4B4_UNORM:
+ {
+ ushort *d = (ushort *) dest;
+ *d = ((a & 0xf0) << 8) | ((r & 0xf0) << 4) | ((g & 0xf0) << 0) | (b >> 4);
+ }
+ return;
+ case PIPE_FORMAT_A8_UNORM:
+ {
+ ubyte *d = (ubyte *) dest;
+ *d = a;
+ }
+ return;
+ case PIPE_FORMAT_L8_UNORM:
+ case PIPE_FORMAT_I8_UNORM:
+ {
+ ubyte *d = (ubyte *) dest;
+ *d = r;
+ }
+ return;
+ case PIPE_FORMAT_R32G32B32A32_FLOAT:
+ {
+ float *d = (float *) dest;
+ d[0] = (float)r / 255.0f;
+ d[1] = (float)g / 255.0f;
+ d[2] = (float)b / 255.0f;
+ d[3] = (float)a / 255.0f;
+ }
+ return;
+ case PIPE_FORMAT_R32G32B32_FLOAT:
+ {
+ float *d = (float *) dest;
+ d[0] = (float)r / 255.0f;
+ d[1] = (float)g / 255.0f;
+ d[2] = (float)b / 255.0f;
+ }
+ return;
+
+ /* XXX lots more cases to add */
+ default:
+ debug_print_format("gallium: unhandled format in util_pack_color_ub()", format);
+ assert(0);
+ }
+}
+
+
+/**
+ * Unpack RGBA from a packed pixel, returning values as ubytes in [0,255].
+ */
+static INLINE void
+util_unpack_color_ub(enum pipe_format format, const void *src,
+ ubyte *r, ubyte *g, ubyte *b, ubyte *a)
+{
+ switch (format) {
+ case PIPE_FORMAT_R8G8B8A8_UNORM:
+ {
+ uint p = ((const uint *) src)[0];
+ *r = (ubyte) ((p >> 24) & 0xff);
+ *g = (ubyte) ((p >> 16) & 0xff);
+ *b = (ubyte) ((p >> 8) & 0xff);
+ *a = (ubyte) ((p >> 0) & 0xff);
+ }
+ return;
+ case PIPE_FORMAT_R8G8B8X8_UNORM:
+ {
+ uint p = ((const uint *) src)[0];
+ *r = (ubyte) ((p >> 24) & 0xff);
+ *g = (ubyte) ((p >> 16) & 0xff);
+ *b = (ubyte) ((p >> 8) & 0xff);
+ *a = (ubyte) 0xff;
+ }
+ return;
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ {
+ uint p = ((const uint *) src)[0];
+ *r = (ubyte) ((p >> 16) & 0xff);
+ *g = (ubyte) ((p >> 8) & 0xff);
+ *b = (ubyte) ((p >> 0) & 0xff);
+ *a = (ubyte) ((p >> 24) & 0xff);
+ }
+ return;
+ case PIPE_FORMAT_X8R8G8B8_UNORM:
+ {
+ uint p = ((const uint *) src)[0];
+ *r = (ubyte) ((p >> 16) & 0xff);
+ *g = (ubyte) ((p >> 8) & 0xff);
+ *b = (ubyte) ((p >> 0) & 0xff);
+ *a = (ubyte) 0xff;
+ }
+ return;
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ {
+ uint p = ((const uint *) src)[0];
+ *r = (ubyte) ((p >> 8) & 0xff);
+ *g = (ubyte) ((p >> 16) & 0xff);
+ *b = (ubyte) ((p >> 24) & 0xff);
+ *a = (ubyte) ((p >> 0) & 0xff);
+ }
+ return;
+ case PIPE_FORMAT_B8G8R8X8_UNORM:
+ {
+ uint p = ((const uint *) src)[0];
+ *r = (ubyte) ((p >> 8) & 0xff);
+ *g = (ubyte) ((p >> 16) & 0xff);
+ *b = (ubyte) ((p >> 24) & 0xff);
+ *a = (ubyte) 0xff;
+ }
+ return;
+ case PIPE_FORMAT_R5G6B5_UNORM:
+ {
+ ushort p = ((const ushort *) src)[0];
+ *r = (ubyte) (((p >> 8) & 0xf8) | ((p >> 13) & 0x7));
+ *g = (ubyte) (((p >> 3) & 0xfc) | ((p >> 9) & 0x3));
+ *b = (ubyte) (((p << 3) & 0xf8) | ((p >> 2) & 0x7));
+ *a = (ubyte) 0xff;
+ }
+ return;
+ case PIPE_FORMAT_A1R5G5B5_UNORM:
+ {
+ ushort p = ((const ushort *) src)[0];
+ *r = (ubyte) (((p >> 7) & 0xf8) | ((p >> 12) & 0x7));
+ *g = (ubyte) (((p >> 2) & 0xf8) | ((p >> 7) & 0x7));
+ *b = (ubyte) (((p << 3) & 0xf8) | ((p >> 2) & 0x7));
+ *a = (ubyte) (0xff * (p >> 15));
+ }
+ return;
+ case PIPE_FORMAT_A4R4G4B4_UNORM:
+ {
+ ushort p = ((const ushort *) src)[0];
+ *r = (ubyte) (((p >> 4) & 0xf0) | ((p >> 8) & 0xf));
+ *g = (ubyte) (((p >> 0) & 0xf0) | ((p >> 4) & 0xf));
+ *b = (ubyte) (((p << 4) & 0xf0) | ((p >> 0) & 0xf));
+ *a = (ubyte) (((p >> 8) & 0xf0) | ((p >> 12) & 0xf));
+ }
+ return;
+ case PIPE_FORMAT_A8_UNORM:
+ {
+ ubyte p = ((const ubyte *) src)[0];
+ *r = *g = *b = (ubyte) 0xff;
+ *a = p;
+ }
+ return;
+ case PIPE_FORMAT_L8_UNORM:
+ {
+ ubyte p = ((const ubyte *) src)[0];
+ *r = *g = *b = p;
+ *a = (ubyte) 0xff;
+ }
+ return;
+ case PIPE_FORMAT_I8_UNORM:
+ {
+ ubyte p = ((const ubyte *) src)[0];
+ *r = *g = *b = *a = p;
+ }
+ return;
+ case PIPE_FORMAT_R32G32B32A32_FLOAT:
+ {
+ const float *p = (const float *) src;
+ *r = float_to_ubyte(p[0]);
+ *g = float_to_ubyte(p[1]);
+ *b = float_to_ubyte(p[2]);
+ *a = float_to_ubyte(p[3]);
+ }
+ return;
+ case PIPE_FORMAT_R32G32B32_FLOAT:
+ {
+ const float *p = (const float *) src;
+ *r = float_to_ubyte(p[0]);
+ *g = float_to_ubyte(p[1]);
+ *b = float_to_ubyte(p[2]);
+ *a = (ubyte) 0xff;
+ }
+ return;
+
+ case PIPE_FORMAT_R32G32_FLOAT:
+ {
+ const float *p = (const float *) src;
+ *r = float_to_ubyte(p[0]);
+ *g = float_to_ubyte(p[1]);
+ *b = *a = (ubyte) 0xff;
+ }
+ return;
+
+ case PIPE_FORMAT_R32_FLOAT:
+ {
+ const float *p = (const float *) src;
+ *r = float_to_ubyte(p[0]);
+ *g = *b = *a = (ubyte) 0xff;
+ }
+ return;
+
+ /* XXX lots more cases to add */
+ default:
+ debug_print_format("gallium: unhandled format in util_unpack_color_ub()",
+ format);
+ assert(0);
+ }
+}
+
+
+
+/**
+ * Note rgba outside [0,1] will be clamped for int pixel formats.
+ */
+static INLINE void
+util_pack_color(const float rgba[4], enum pipe_format format, void *dest)
+{
+ ubyte r, g, b, a;
+
+ if (pf_size_x(format) <= 8) {
+ /* format uses 8-bit components or less */
+ r = float_to_ubyte(rgba[0]);
+ g = float_to_ubyte(rgba[1]);
+ b = float_to_ubyte(rgba[2]);
+ a = float_to_ubyte(rgba[3]);
+ }
+
+ switch (format) {
+ case PIPE_FORMAT_R8G8B8A8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (r << 24) | (g << 16) | (b << 8) | a;
+ }
+ return;
+ case PIPE_FORMAT_R8G8B8X8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (r << 24) | (g << 16) | (b << 8) | 0xff;
+ }
+ return;
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (a << 24) | (r << 16) | (g << 8) | b;
+ }
+ return;
+ case PIPE_FORMAT_X8R8G8B8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (0xff << 24) | (r << 16) | (g << 8) | b;
+ }
+ return;
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (b << 24) | (g << 16) | (r << 8) | a;
+ }
+ return;
+ case PIPE_FORMAT_B8G8R8X8_UNORM:
+ {
+ uint *d = (uint *) dest;
+ *d = (b << 24) | (g << 16) | (r << 8) | 0xff;
+ }
+ return;
+ case PIPE_FORMAT_R5G6B5_UNORM:
+ {
+ ushort *d = (ushort *) dest;
+ *d = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3);
+ }
+ return;
+ case PIPE_FORMAT_A1R5G5B5_UNORM:
+ {
+ ushort *d = (ushort *) dest;
+ *d = ((a & 0x80) << 8) | ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | (b >> 3);
+ }
+ return;
+ case PIPE_FORMAT_A4R4G4B4_UNORM:
+ {
+ ushort *d = (ushort *) dest;
+ *d = ((a & 0xf0) << 8) | ((r & 0xf0) << 4) | ((g & 0xf0) << 0) | (b >> 4);
+ }
+ return;
+ case PIPE_FORMAT_A8_UNORM:
+ {
+ ubyte *d = (ubyte *) dest;
+ *d = a;
+ }
+ return;
+ case PIPE_FORMAT_L8_UNORM:
+ case PIPE_FORMAT_I8_UNORM:
+ {
+ ubyte *d = (ubyte *) dest;
+ *d = r;
+ }
+ return;
+ case PIPE_FORMAT_R32G32B32A32_FLOAT:
+ {
+ float *d = (float *) dest;
+ d[0] = rgba[0];
+ d[1] = rgba[1];
+ d[2] = rgba[2];
+ d[3] = rgba[3];
+ }
+ return;
+ case PIPE_FORMAT_R32G32B32_FLOAT:
+ {
+ float *d = (float *) dest;
+ d[0] = rgba[0];
+ d[1] = rgba[1];
+ d[2] = rgba[2];
+ }
+ return;
+ /* XXX lots more cases to add */
+ default:
+ debug_print_format("gallium: unhandled format in util_pack_color()", format);
+ assert(0);
+ }
+}
+
+
+/**
+ * Note: it's assumed that z is in [0,1]
+ */
+static INLINE uint
+util_pack_z(enum pipe_format format, double z)
+{
+ if (z == 0.0)
+ return 0;
+
+ switch (format) {
+ case PIPE_FORMAT_Z16_UNORM:
+ if (z == 1.0)
+ return 0xffff;
+ return (uint) (z * 0xffff);
+ case PIPE_FORMAT_Z32_UNORM:
+ /* special-case to avoid overflow */
+ if (z == 1.0)
+ return 0xffffffff;
+ return (uint) (z * 0xffffffff);
+ case PIPE_FORMAT_S8Z24_UNORM:
+ case PIPE_FORMAT_X8Z24_UNORM:
+ if (z == 1.0)
+ return 0xffffff;
+ return (uint) (z * 0xffffff);
+ case PIPE_FORMAT_Z24S8_UNORM:
+ case PIPE_FORMAT_Z24X8_UNORM:
+ if (z == 1.0)
+ return 0xffffff00;
+ return ((uint) (z * 0xffffff)) << 8;
+ default:
+ debug_print_format("gallium: unhandled format in util_pack_z()", format);
+ assert(0);
+ return 0;
+ }
+}
+
+
+/**
+ * Pack 4 ubytes into a 4-byte word
+ */
+static INLINE unsigned
+pack_ub4(ubyte b0, ubyte b1, ubyte b2, ubyte b3)
+{
+ return ((((unsigned int)b0) << 0) |
+ (((unsigned int)b1) << 8) |
+ (((unsigned int)b2) << 16) |
+ (((unsigned int)b3) << 24));
+}
+
+
+/**
+ * Pack/convert 4 floats into one 4-byte word.
+ */
+static INLINE unsigned
+pack_ui32_float4(float a, float b, float c, float d)
+{
+ return pack_ub4( float_to_ubyte(a),
+ float_to_ubyte(b),
+ float_to_ubyte(c),
+ float_to_ubyte(d) );
+}
+
+
+
+#endif /* U_PACK_COLOR_H */
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