Added extra needed files

1 files changed, 164 insertions, 0 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h b/mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h
new file mode 100644
index 000000000..01f4e2108
--- /dev/null
+++ b/mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h
@@ -0,0 +1,164 @@
+/*

+ * Copyright (C) 2011 Marek Olšák <maraeo@gmail.com>

+ *

+ * 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.

+ */

+

+/* Copied from EXT_texture_shared_exponent and edited. */

+

+#ifndef RGB9E5_H

+#define RGB9E5_H

+

+#include <math.h>

+#include <assert.h>

+

+#define RGB9E5_EXPONENT_BITS          5

+#define RGB9E5_MANTISSA_BITS          9

+#define RGB9E5_EXP_BIAS               15

+#define RGB9E5_MAX_VALID_BIASED_EXP   31

+

+#define MAX_RGB9E5_EXP               (RGB9E5_MAX_VALID_BIASED_EXP - RGB9E5_EXP_BIAS)

+#define RGB9E5_MANTISSA_VALUES       (1<<RGB9E5_MANTISSA_BITS)

+#define MAX_RGB9E5_MANTISSA          (RGB9E5_MANTISSA_VALUES-1)

+#define MAX_RGB9E5                   (((float)MAX_RGB9E5_MANTISSA)/RGB9E5_MANTISSA_VALUES * (1<<MAX_RGB9E5_EXP))

+#define EPSILON_RGB9E5               ((1.0/RGB9E5_MANTISSA_VALUES) / (1<<RGB9E5_EXP_BIAS))

+

+typedef union {

+   unsigned int raw;

+   float value;

+   struct {

+#if defined(MESA_BIG_ENDIAN) || defined(PIPE_ARCH_BIG_ENDIAN)

+      unsigned int negative:1;

+      unsigned int biasedexponent:8;

+      unsigned int mantissa:23;

+#else

+      unsigned int mantissa:23;

+      unsigned int biasedexponent:8;

+      unsigned int negative:1;

+#endif

+   } field;

+} float754;

+

+typedef union {

+   unsigned int raw;

+   struct {

+#if defined(MESA_BIG_ENDIAN) || defined(PIPE_ARCH_BIG_ENDIAN)

+      unsigned int biasedexponent:RGB9E5_EXPONENT_BITS;

+      unsigned int b:RGB9E5_MANTISSA_BITS;

+      unsigned int g:RGB9E5_MANTISSA_BITS;

+      unsigned int r:RGB9E5_MANTISSA_BITS;

+#else

+      unsigned int r:RGB9E5_MANTISSA_BITS;

+      unsigned int g:RGB9E5_MANTISSA_BITS;

+      unsigned int b:RGB9E5_MANTISSA_BITS;

+      unsigned int biasedexponent:RGB9E5_EXPONENT_BITS;

+#endif

+   } field;

+} rgb9e5;

+

+static INLINE float rgb9e5_ClampRange(float x)

+{

+   if (x > 0.0) {

+      if (x >= MAX_RGB9E5) {

+         return MAX_RGB9E5;

+      } else {

+         return x;

+      }

+   } else {

+      /* NaN gets here too since comparisons with NaN always fail! */

+      return 0.0;

+   }

+}

+

+/* Ok, FloorLog2 is not correct for the denorm and zero values, but we

+   are going to do a max of this value with the minimum rgb9e5 exponent

+   that will hide these problem cases. */

+static INLINE int rgb9e5_FloorLog2(float x)

+{

+   float754 f;

+

+   f.value = x;

+   return (f.field.biasedexponent - 127);

+}

+

+static INLINE unsigned float3_to_rgb9e5(const float rgb[3])

+{

+   rgb9e5 retval;

+   float maxrgb;

+   int rm, gm, bm;

+   float rc, gc, bc;

+   int exp_shared, maxm;

+   double denom;

+

+   rc = rgb9e5_ClampRange(rgb[0]);

+   gc = rgb9e5_ClampRange(rgb[1]);

+   bc = rgb9e5_ClampRange(rgb[2]);

+

+   maxrgb = MAX3(rc, gc, bc);

+   exp_shared = MAX2(-RGB9E5_EXP_BIAS-1, rgb9e5_FloorLog2(maxrgb)) + 1 + RGB9E5_EXP_BIAS;

+   assert(exp_shared <= RGB9E5_MAX_VALID_BIASED_EXP);

+   assert(exp_shared >= 0);

+   /* This pow function could be replaced by a table. */

+   denom = pow(2, exp_shared - RGB9E5_EXP_BIAS - RGB9E5_MANTISSA_BITS);

+

+   maxm = (int) floor(maxrgb / denom + 0.5);

+   if (maxm == MAX_RGB9E5_MANTISSA+1) {

+      denom *= 2;

+      exp_shared += 1;

+      assert(exp_shared <= RGB9E5_MAX_VALID_BIASED_EXP);

+   } else {

+      assert(maxm <= MAX_RGB9E5_MANTISSA);

+   }

+

+   rm = (int) floor(rc / denom + 0.5);

+   gm = (int) floor(gc / denom + 0.5);

+   bm = (int) floor(bc / denom + 0.5);

+

+   assert(rm <= MAX_RGB9E5_MANTISSA);

+   assert(gm <= MAX_RGB9E5_MANTISSA);

+   assert(bm <= MAX_RGB9E5_MANTISSA);

+   assert(rm >= 0);

+   assert(gm >= 0);

+   assert(bm >= 0);

+

+   retval.field.r = rm;

+   retval.field.g = gm;

+   retval.field.b = bm;

+   retval.field.biasedexponent = exp_shared;

+

+   return retval.raw;

+}

+

+static INLINE void rgb9e5_to_float3(unsigned rgb, float retval[3])

+{

+   rgb9e5 v;

+   int exponent;

+   float scale;

+

+   v.raw = rgb;

+   exponent = v.field.biasedexponent - RGB9E5_EXP_BIAS - RGB9E5_MANTISSA_BITS;

+   scale = (float) pow(2, exponent);

+

+   retval[0] = v.field.r * scale;

+   retval[1] = v.field.g * scale;

+   retval[2] = v.field.b * scale;

+}

+

+#endif