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-rw-r--r--src/gallium/auxiliary/util/u_format.csv2
-rw-r--r--src/gallium/auxiliary/util/u_format_other.c204
-rw-r--r--src/gallium/auxiliary/util/u_format_other.h26
-rw-r--r--src/gallium/auxiliary/util/u_format_r11g11b10f.h190
-rw-r--r--src/gallium/auxiliary/util/u_format_rgb9e5.h164
-rw-r--r--src/gallium/auxiliary/util/u_math.h8
6 files changed, 585 insertions, 9 deletions
diff --git a/src/gallium/auxiliary/util/u_format.csv b/src/gallium/auxiliary/util/u_format.csv
index e4b3f5df6ee..347e2beb8dd 100644
--- a/src/gallium/auxiliary/util/u_format.csv
+++ b/src/gallium/auxiliary/util/u_format.csv
@@ -147,7 +147,7 @@ PIPE_FORMAT_G8R8_G8B8_UNORM , subsampled, 2, 1, x32 , , , , xyz
# some special formats not fitting anywhere else
PIPE_FORMAT_R10G10B10A2_USCALED , plain, 1, 1, u10 , u10 , u10 , u2 , xyzw, rgb
-PIPE_FORMAT_R11G11B10_FLOAT , plain, 1, 1, f11 , f11 , f10 , , xyz1, rgb
+PIPE_FORMAT_R11G11B10_FLOAT , other, 1, 1, x32 , , , , xyz1, rgb
PIPE_FORMAT_R9G9B9E5_FLOAT , other, 1, 1, x32 , , , , xyz1, rgb
PIPE_FORMAT_R1_UNORM , other, 8, 1, x8 , , , , x001, rgb
# A.k.a. D3DFMT_CxV8U8
diff --git a/src/gallium/auxiliary/util/u_format_other.c b/src/gallium/auxiliary/util/u_format_other.c
index fa42ec37138..c23f4ee4ac5 100644
--- a/src/gallium/auxiliary/util/u_format_other.c
+++ b/src/gallium/auxiliary/util/u_format_other.c
@@ -28,6 +28,8 @@
#include "u_math.h"
#include "u_format_other.h"
+#include "u_format_rgb9e5.h"
+#include "u_format_r11g11b10f.h"
void
@@ -35,7 +37,23 @@ util_format_r9g9b9e5_float_unpack_rgba_float(float *dst_row, unsigned dst_stride
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
-
+ unsigned x, y;
+ for(y = 0; y < height; y += 1) {
+ float *dst = dst_row;
+ const uint8_t *src = src_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value = *(const uint32_t *)src;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ rgb9e5_to_float3(value, dst);
+ dst[3] = 1; /* a */
+ src += 4;
+ dst += 4;
+ }
+ src_row += src_stride;
+ dst_row += dst_stride/sizeof(*dst_row);
+ }
}
void
@@ -43,14 +61,34 @@ util_format_r9g9b9e5_float_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride
const float *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
-
+ unsigned x, y;
+ for(y = 0; y < height; y += 1) {
+ const float *src = src_row;
+ uint8_t *dst = dst_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value = float3_to_rgb9e5(src);
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ *(uint32_t *)dst = value;
+ src += 4;
+ dst += 4;
+ }
+ dst_row += dst_stride;
+ src_row += src_stride/sizeof(*src_row);
+ }
}
void
util_format_r9g9b9e5_float_fetch_rgba_float(float *dst, const uint8_t *src,
unsigned i, unsigned j)
{
-
+ uint32_t value = *(const uint32_t *)src;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ rgb9e5_to_float3(value, dst);
+ dst[3] = 1; /* a */
}
@@ -59,7 +97,27 @@ util_format_r9g9b9e5_float_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_str
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
-
+ unsigned x, y;
+ float p[3];
+ for(y = 0; y < height; y += 1) {
+ uint8_t *dst = dst_row;
+ const uint8_t *src = src_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value = *(const uint32_t *)src;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ rgb9e5_to_float3(value, p);
+ dst[0] = float_to_ubyte(p[0]); /* r */
+ dst[1] = float_to_ubyte(p[1]); /* g */
+ dst[2] = float_to_ubyte(p[2]); /* b */
+ dst[3] = 255; /* a */
+ src += 4;
+ dst += 4;
+ }
+ src_row += src_stride;
+ dst_row += dst_stride/sizeof(*dst_row);
+ }
}
@@ -68,7 +126,145 @@ util_format_r9g9b9e5_float_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_strid
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height)
{
+ unsigned x, y;
+ float p[3];
+ for(y = 0; y < height; y += 1) {
+ const uint8_t *src = src_row;
+ uint8_t *dst = dst_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value;
+ p[0] = ubyte_to_float(src[0]);
+ p[1] = ubyte_to_float(src[1]);
+ p[2] = ubyte_to_float(src[2]);
+ value = float3_to_rgb9e5(p);
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ *(uint32_t *)dst = value;
+ src += 4;
+ dst += 4;
+ }
+ dst_row += dst_stride;
+ src_row += src_stride/sizeof(*src_row);
+ }
+}
+
+void
+util_format_r11g11b10_float_unpack_rgba_float(float *dst_row, unsigned dst_stride,
+ const uint8_t *src_row, unsigned src_stride,
+ unsigned width, unsigned height)
+{
+ unsigned x, y;
+ for(y = 0; y < height; y += 1) {
+ float *dst = dst_row;
+ const uint8_t *src = src_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value = *(const uint32_t *)src;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ r11g11b10f_to_float3(value, dst);
+ dst[3] = 1; /* a */
+ src += 4;
+ dst += 4;
+ }
+ src_row += src_stride;
+ dst_row += dst_stride/sizeof(*dst_row);
+ }
+}
+
+void
+util_format_r11g11b10_float_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
+ const float *src_row, unsigned src_stride,
+ unsigned width, unsigned height)
+{
+ unsigned x, y;
+ for(y = 0; y < height; y += 1) {
+ const float *src = src_row;
+ uint8_t *dst = dst_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value = float3_to_r11g11b10f(src);
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ *(uint32_t *)dst = value;
+ src += 4;
+ dst += 4;
+ }
+ dst_row += dst_stride;
+ src_row += src_stride/sizeof(*src_row);
+ }
+}
+
+void
+util_format_r11g11b10_float_fetch_rgba_float(float *dst, const uint8_t *src,
+ unsigned i, unsigned j)
+{
+ uint32_t value = *(const uint32_t *)src;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ r11g11b10f_to_float3(value, dst);
+ dst[3] = 1; /* a */
+}
+
+
+void
+util_format_r11g11b10_float_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
+ const uint8_t *src_row, unsigned src_stride,
+ unsigned width, unsigned height)
+{
+ unsigned x, y;
+ float p[3];
+ for(y = 0; y < height; y += 1) {
+ uint8_t *dst = dst_row;
+ const uint8_t *src = src_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value = *(const uint32_t *)src;
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ r11g11b10f_to_float3(value, p);
+ dst[0] = float_to_ubyte(p[0]); /* r */
+ dst[1] = float_to_ubyte(p[1]); /* g */
+ dst[2] = float_to_ubyte(p[2]); /* b */
+ dst[3] = 255; /* a */
+ src += 4;
+ dst += 4;
+ }
+ src_row += src_stride;
+ dst_row += dst_stride/sizeof(*dst_row);
+ }
+}
+
+
+void
+util_format_r11g11b10_float_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
+ const uint8_t *src_row, unsigned src_stride,
+ unsigned width, unsigned height)
+{
+ unsigned x, y;
+ float p[3];
+ for(y = 0; y < height; y += 1) {
+ const uint8_t *src = src_row;
+ uint8_t *dst = dst_row;
+ for(x = 0; x < width; x += 1) {
+ uint32_t value;
+ p[0] = ubyte_to_float(src[0]);
+ p[1] = ubyte_to_float(src[1]);
+ p[2] = ubyte_to_float(src[2]);
+ value = float3_to_r11g11b10f(p);
+#ifdef PIPE_ARCH_BIG_ENDIAN
+ value = util_bswap32(value);
+#endif
+ *(uint32_t *)dst = value;
+ src += 4;
+ dst += 4;
+ }
+ dst_row += dst_stride;
+ src_row += src_stride/sizeof(*src_row);
+ }
}
diff --git a/src/gallium/auxiliary/util/u_format_other.h b/src/gallium/auxiliary/util/u_format_other.h
index 98c97be33fa..2f6a908bbe8 100644
--- a/src/gallium/auxiliary/util/u_format_other.h
+++ b/src/gallium/auxiliary/util/u_format_other.h
@@ -57,6 +57,32 @@ util_format_r9g9b9e5_float_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_strid
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
+
+void
+util_format_r11g11b10_float_unpack_rgba_float(float *dst_row, unsigned dst_stride,
+ const uint8_t *src_row, unsigned src_stride,
+ unsigned width, unsigned height);
+
+void
+util_format_r11g11b10_float_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
+ const float *src_row, unsigned src_stride,
+ unsigned width, unsigned height);
+
+void
+util_format_r11g11b10_float_fetch_rgba_float(float *dst, const uint8_t *src,
+ unsigned i, unsigned j);
+
+void
+util_format_r11g11b10_float_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
+ const uint8_t *src_row, unsigned src_stride,
+ unsigned width, unsigned height);
+
+void
+util_format_r11g11b10_float_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
+ const uint8_t *src_row, unsigned src_stride,
+ unsigned width, unsigned height);
+
+
void
util_format_r1_unorm_unpack_rgba_float(float *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
diff --git a/src/gallium/auxiliary/util/u_format_r11g11b10f.h b/src/gallium/auxiliary/util/u_format_r11g11b10f.h
new file mode 100644
index 00000000000..c4181d0e34e
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_format_r11g11b10f.h
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2011 Marek Olšák <[email protected]>
+ *
+ * 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.
+ */
+
+/* Based on code from The OpenGL Programming Guide / 7th Edition, Appendix J.
+ * Available here: http://www.opengl-redbook.com/appendices/
+ * The algorithm in the book contains a bug though, which is fixed in the code
+ * below.
+ */
+
+#define UF11_EXPONENT_BIAS 15
+#define UF11_EXPONENT_BITS 0x1F
+#define UF11_EXPONENT_SHIFT 6
+#define UF11_MANTISSA_BITS 0x3F
+#define UF11_MANTISSA_SHIFT (23 - UF11_EXPONENT_SHIFT)
+#define UF11_MAX_EXPONENT (UF11_EXPONENT_BITS << UF11_EXPONENT_SHIFT)
+
+#define UF10_EXPONENT_BIAS 15
+#define UF10_EXPONENT_BITS 0x1F
+#define UF10_EXPONENT_SHIFT 5
+#define UF10_MANTISSA_BITS 0x3F
+#define UF10_MANTISSA_SHIFT (23 - UF10_EXPONENT_SHIFT)
+#define UF10_MAX_EXPONENT (UF10_EXPONENT_BITS << UF10_EXPONENT_SHIFT)
+
+#define F32_INFINITY 0x7f800000
+
+static INLINE unsigned f32_to_uf11(float val)
+{
+ uint32_t f32 = (*(uint32_t *) &val);
+ uint16_t uf11 = 0;
+
+ /* Decode little-endian 32-bit floating-point value */
+ int sign = (f32 >> 16) & 0x8000;
+ /* Map exponent to the range [-127,128] */
+ int exponent = ((f32 >> 23) & 0xff) - 127;
+ int mantissa = f32 & 0x007fffff;
+
+ if (sign) return 0;
+
+ if (exponent == 128) { /* Infinity or NaN */
+ uf11 = UF11_MAX_EXPONENT;
+ if (mantissa) uf11 |= (mantissa & UF11_MANTISSA_BITS);
+ }
+ else if (exponent > 15) { /* Overflow - flush to Infinity */
+ uf11 = UF11_MAX_EXPONENT;
+ }
+ else if (exponent > -15) { /* Representable value */
+ exponent += UF11_EXPONENT_BIAS;
+ mantissa >>= UF11_MANTISSA_SHIFT;
+ uf11 = exponent << UF11_EXPONENT_SHIFT | mantissa;
+ }
+
+ return uf11;
+}
+
+static INLINE float uf11_to_f32(uint16_t val)
+{
+ union {
+ float f;
+ uint32_t ui;
+ } f32;
+
+ int exponent = (val & 0x07c0) >> UF11_EXPONENT_SHIFT;
+ int mantissa = (val & 0x003f);
+
+ f32.f = 0.0;
+
+ if (exponent == 0) {
+ if (mantissa != 0) {
+ const float scale = 1.0 / (1 << 20);
+ f32.f = scale * mantissa;
+ }
+ }
+ else if (exponent == 31) {
+ f32.ui = F32_INFINITY | mantissa;
+ }
+ else {
+ float scale, decimal;
+ exponent -= 15;
+ if (exponent < 0) {
+ scale = 1.0 / (1 << -exponent);
+ }
+ else {
+ scale = 1 << exponent;
+ }
+ decimal = 1.0 + (float) mantissa / 64;
+ f32.f = scale * decimal;
+ }
+
+ return f32.f;
+}
+
+static INLINE unsigned f32_to_uf10(float val)
+{
+ uint32_t f32 = (*(uint32_t *) &val);
+ uint16_t uf10 = 0;
+
+ /* Decode little-endian 32-bit floating-point value */
+ int sign = (f32 >> 16) & 0x8000;
+ /* Map exponent to the range [-127,128] */
+ int exponent = ((f32 >> 23) & 0xff) - 127;
+ int mantissa = f32 & 0x007fffff;
+
+ if (sign) return 0;
+
+ if (exponent == 128) { /* Infinity or NaN */
+ uf10 = UF10_MAX_EXPONENT;
+ if (mantissa) uf10 |= (mantissa & UF10_MANTISSA_BITS);
+ }
+ else if (exponent > 15) { /* Overflow - flush to Infinity */
+ uf10 = UF10_MAX_EXPONENT;
+ }
+ else if (exponent > -15) { /* Representable value */
+ exponent += UF10_EXPONENT_BIAS;
+ mantissa >>= UF10_MANTISSA_SHIFT;
+ uf10 = exponent << UF10_EXPONENT_SHIFT | mantissa;
+ }
+
+ return uf10;
+}
+
+static INLINE float uf10_to_f32(uint16_t val)
+{
+ union {
+ float f;
+ uint32_t ui;
+ } f32;
+
+ int exponent = (val & 0x07c0) >> UF10_EXPONENT_SHIFT;
+ int mantissa = (val & 0x003f);
+
+ f32.f = 0.0;
+
+ if (exponent == 0) {
+ if (mantissa != 0) {
+ const float scale = 1.0 / (1 << 20);
+ f32.f = scale * mantissa;
+ }
+ }
+ else if (exponent == 31) {
+ f32.ui = F32_INFINITY | mantissa;
+ }
+ else {
+ float scale, decimal;
+ exponent -= 15;
+ if (exponent < 0) {
+ scale = 1.0 / (1 << -exponent);
+ }
+ else {
+ scale = 1 << exponent;
+ }
+ decimal = 1.0 + (float) mantissa / 32;
+ f32.f = scale * decimal;
+ }
+
+ return f32.f;
+}
+
+static INLINE unsigned float3_to_r11g11b10f(const float rgb[3])
+{
+ return ( f32_to_uf11(rgb[0]) & 0x7ff) |
+ ((f32_to_uf11(rgb[1]) & 0x7ff) << 11) |
+ ((f32_to_uf10(rgb[2]) & 0x3ff) << 22);
+}
+
+static INLINE void r11g11b10f_to_float3(unsigned rgb, float retval[3])
+{
+ retval[0] = uf11_to_f32( rgb & 0x7ff);
+ retval[1] = uf11_to_f32((rgb >> 11) & 0x7ff);
+ retval[2] = uf10_to_f32((rgb >> 22) & 0x3ff);
+}
diff --git a/src/gallium/auxiliary/util/u_format_rgb9e5.h b/src/gallium/auxiliary/util/u_format_rgb9e5.h
new file mode 100644
index 00000000000..c2a3f6f3e9d
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_format_rgb9e5.h
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2011 Marek Olšák <[email protected]>
+ *
+ * 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
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index e3d4c06b6f9..dad6a101fd7 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -581,11 +581,11 @@ util_bswap16(uint16_t n)
#define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
#define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
-#define MIN3( A, B, C ) MIN2( MIN2( A, B ), C )
-#define MAX3( A, B, C ) MAX2( MAX2( A, B ), C )
+#define MIN3( A, B, C ) ((A) < (B) ? MIN2(A, C) : MIN2(B, C))
+#define MAX3( A, B, C ) ((A) > (B) ? MAX2(A, C) : MAX2(B, C))
-#define MIN4( A, B, C, D ) MIN2( MIN2( A, B ), MIN2(C, D) )
-#define MAX4( A, B, C, D ) MAX2( MAX2( A, B ), MAX2(C, D) )
+#define MIN4( A, B, C, D ) ((A) < (B) ? MIN3(A, C, D) : MIN3(B, C, D))
+#define MAX4( A, B, C, D ) ((A) > (B) ? MAX3(A, C, D) : MAX3(B, C, D))
/**
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 01:47:23 +0000