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author | marha <marha@users.sourceforge.net> | 2012-06-08 09:33:13 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2012-06-08 09:33:13 +0200 |
commit | 990bc3f015a4f8fce2eb918375defcd44980a845 (patch) | |
tree | 8e8301f19482b52cc00bd95b4593522cc93267af /mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h | |
parent | 1af6fc1b5d93e54d6674de8b5870448b29f139a7 (diff) | |
download | vcxsrv-990bc3f015a4f8fce2eb918375defcd44980a845.tar.gz vcxsrv-990bc3f015a4f8fce2eb918375defcd44980a845.tar.bz2 vcxsrv-990bc3f015a4f8fce2eb918375defcd44980a845.zip |
Used synchronise script to update files
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h')
-rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h | 328 |
1 files changed, 164 insertions, 164 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h b/mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h index 01f4e2108..c2a3f6f3e 100644 --- a/mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h +++ b/mesalib/src/gallium/auxiliary/util/u_format_rgb9e5.h @@ -1,164 +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
+/* + * 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 |