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/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* 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 VMWARE 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 "util/compiler.h"
#include "util/format/u_formats.h"
#include "util/format/u_format.h"
#include "util/u_math.h"
/**
* Helper union for packing pixel values.
* Will often contain values in formats which are too complex to be described
* in simple terms, hence might just effectively contain a number of bytes.
* Must be big enough to hold data for all formats (currently 256 bits).
*/
union util_color {
uint8_t ub;
uint16_t us;
uint32_t ui[4];
uint16_t h[4]; /* half float */
float f[4];
double d[4];
};
/**
* Pack uint8 R,G,B,A into dest pixel.
*/
static inline void
util_pack_color_ub(uint8_t r, uint8_t g, uint8_t b, uint8_t a,
enum pipe_format format, union util_color *uc)
{
switch (format) {
case PIPE_FORMAT_ABGR8888_UNORM:
{
uc->ui[0] = (r << 24) | (g << 16) | (b << 8) | a;
}
return;
case PIPE_FORMAT_XBGR8888_UNORM:
{
uc->ui[0] = (r << 24) | (g << 16) | (b << 8) | 0xff;
}
return;
case PIPE_FORMAT_BGRA8888_UNORM:
{
uc->ui[0] = (a << 24) | (r << 16) | (g << 8) | b;
}
return;
case PIPE_FORMAT_BGRX8888_UNORM:
{
uc->ui[0] = (0xff << 24) | (r << 16) | (g << 8) | b;
}
return;
case PIPE_FORMAT_ARGB8888_UNORM:
{
uc->ui[0] = (b << 24) | (g << 16) | (r << 8) | a;
}
return;
case PIPE_FORMAT_XRGB8888_UNORM:
{
uc->ui[0] = (b << 24) | (g << 16) | (r << 8) | 0xff;
}
return;
case PIPE_FORMAT_B5G6R5_UNORM:
{
uc->us = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3);
}
return;
case PIPE_FORMAT_B5G5R5X1_UNORM:
{
uc->us = ((0x80) << 8) | ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | (b >> 3);
}
return;
case PIPE_FORMAT_B5G5R5A1_UNORM:
{
uc->us = ((a & 0x80) << 8) | ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | (b >> 3);
}
return;
case PIPE_FORMAT_B4G4R4A4_UNORM:
{
uc->us = ((a & 0xf0) << 8) | ((r & 0xf0) << 4) | ((g & 0xf0) << 0) | (b >> 4);
}
return;
case PIPE_FORMAT_A8_UNORM:
{
uc->ub = a;
}
return;
case PIPE_FORMAT_L8_UNORM:
case PIPE_FORMAT_I8_UNORM:
{
uc->ub = r;
}
return;
case PIPE_FORMAT_R32G32B32A32_FLOAT:
{
uc->f[0] = (float)r / 255.0f;
uc->f[1] = (float)g / 255.0f;
uc->f[2] = (float)b / 255.0f;
uc->f[3] = (float)a / 255.0f;
}
return;
case PIPE_FORMAT_R32G32B32_FLOAT:
{
uc->f[0] = (float)r / 255.0f;
uc->f[1] = (float)g / 255.0f;
uc->f[2] = (float)b / 255.0f;
}
return;
/* Handle other cases with a generic function.
*/
default:
{
uint8_t src[4];
src[0] = r;
src[1] = g;
src[2] = b;
src[3] = a;
util_format_write_4ub(format, src, 0, uc, 0, 0, 0, 1, 1);
}
}
}
/**
* Unpack RGBA from a packed pixel, returning values as uint8_ts in [0,255].
*/
static inline void
util_unpack_color_ub(enum pipe_format format, union util_color *uc,
uint8_t *r, uint8_t *g, uint8_t *b, uint8_t *a)
{
switch (format) {
case PIPE_FORMAT_ABGR8888_UNORM:
{
uint32_t p = uc->ui[0];
*r = (uint8_t) ((p >> 24) & 0xff);
*g = (uint8_t) ((p >> 16) & 0xff);
*b = (uint8_t) ((p >> 8) & 0xff);
*a = (uint8_t) ((p >> 0) & 0xff);
}
return;
case PIPE_FORMAT_XBGR8888_UNORM:
{
uint32_t p = uc->ui[0];
*r = (uint8_t) ((p >> 24) & 0xff);
*g = (uint8_t) ((p >> 16) & 0xff);
*b = (uint8_t) ((p >> 8) & 0xff);
*a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_BGRA8888_UNORM:
{
uint32_t p = uc->ui[0];
*r = (uint8_t) ((p >> 16) & 0xff);
*g = (uint8_t) ((p >> 8) & 0xff);
*b = (uint8_t) ((p >> 0) & 0xff);
*a = (uint8_t) ((p >> 24) & 0xff);
}
return;
case PIPE_FORMAT_BGRX8888_UNORM:
{
uint32_t p = uc->ui[0];
*r = (uint8_t) ((p >> 16) & 0xff);
*g = (uint8_t) ((p >> 8) & 0xff);
*b = (uint8_t) ((p >> 0) & 0xff);
*a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_ARGB8888_UNORM:
{
uint32_t p = uc->ui[0];
*r = (uint8_t) ((p >> 8) & 0xff);
*g = (uint8_t) ((p >> 16) & 0xff);
*b = (uint8_t) ((p >> 24) & 0xff);
*a = (uint8_t) ((p >> 0) & 0xff);
}
return;
case PIPE_FORMAT_XRGB8888_UNORM:
{
uint32_t p = uc->ui[0];
*r = (uint8_t) ((p >> 8) & 0xff);
*g = (uint8_t) ((p >> 16) & 0xff);
*b = (uint8_t) ((p >> 24) & 0xff);
*a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_B5G6R5_UNORM:
{
uint16_t p = uc->us;
*r = (uint8_t) (((p >> 8) & 0xf8) | ((p >> 13) & 0x7));
*g = (uint8_t) (((p >> 3) & 0xfc) | ((p >> 9) & 0x3));
*b = (uint8_t) (((p << 3) & 0xf8) | ((p >> 2) & 0x7));
*a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_B5G5R5X1_UNORM:
{
uint16_t p = uc->us;
*r = (uint8_t) (((p >> 7) & 0xf8) | ((p >> 12) & 0x7));
*g = (uint8_t) (((p >> 2) & 0xf8) | ((p >> 7) & 0x7));
*b = (uint8_t) (((p << 3) & 0xf8) | ((p >> 2) & 0x7));
*a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_B5G5R5A1_UNORM:
{
uint16_t p = uc->us;
*r = (uint8_t) (((p >> 7) & 0xf8) | ((p >> 12) & 0x7));
*g = (uint8_t) (((p >> 2) & 0xf8) | ((p >> 7) & 0x7));
*b = (uint8_t) (((p << 3) & 0xf8) | ((p >> 2) & 0x7));
*a = (uint8_t) (0xff * (p >> 15));
}
return;
case PIPE_FORMAT_B4G4R4A4_UNORM:
{
uint16_t p = uc->us;
*r = (uint8_t) (((p >> 4) & 0xf0) | ((p >> 8) & 0xf));
*g = (uint8_t) (((p >> 0) & 0xf0) | ((p >> 4) & 0xf));
*b = (uint8_t) (((p << 4) & 0xf0) | ((p >> 0) & 0xf));
*a = (uint8_t) (((p >> 8) & 0xf0) | ((p >> 12) & 0xf));
}
return;
case PIPE_FORMAT_A8_UNORM:
{
uint8_t p = uc->ub;
*r = *g = *b = (uint8_t) 0xff;
*a = p;
}
return;
case PIPE_FORMAT_L8_UNORM:
{
uint8_t p = uc->ub;
*r = *g = *b = p;
*a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_I8_UNORM:
{
uint8_t p = uc->ub;
*r = *g = *b = *a = p;
}
return;
case PIPE_FORMAT_R32G32B32A32_FLOAT:
{
const float *p = &uc->f[0];
*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 = &uc->f[0];
*r = float_to_ubyte(p[0]);
*g = float_to_ubyte(p[1]);
*b = float_to_ubyte(p[2]);
*a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_R32G32_FLOAT:
{
const float *p = &uc->f[0];
*r = float_to_ubyte(p[0]);
*g = float_to_ubyte(p[1]);
*b = *a = (uint8_t) 0xff;
}
return;
case PIPE_FORMAT_R32_FLOAT:
{
const float *p = &uc->f[0];
*r = float_to_ubyte(p[0]);
*g = *b = *a = (uint8_t) 0xff;
}
return;
/* Handle other cases with a generic function.
*/
default:
{
uint8_t dst[4];
util_format_read_4ub(format, dst, 0, uc, 0, 0, 0, 1, 1);
*r = dst[0];
*g = dst[1];
*b = dst[2];
*a = dst[3];
}
}
}
/**
* Note rgba outside [0,1] will be clamped for int pixel formats.
* This will not work (and might not really be useful with float input)
* for pure integer formats (which lack the pack_rgba_float function).
*/
static inline void
util_pack_color(const float rgba[4], enum pipe_format format, union util_color *uc)
{
uint8_t r = 0;
uint8_t g = 0;
uint8_t b = 0;
uint8_t a = 0;
if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 0) <= 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_ABGR8888_UNORM:
{
uc->ui[0] = (r << 24) | (g << 16) | (b << 8) | a;
}
return;
case PIPE_FORMAT_XBGR8888_UNORM:
{
uc->ui[0] = (r << 24) | (g << 16) | (b << 8) | 0xff;
}
return;
case PIPE_FORMAT_BGRA8888_UNORM:
{
uc->ui[0] = (a << 24) | (r << 16) | (g << 8) | b;
}
return;
case PIPE_FORMAT_BGRX8888_UNORM:
{
uc->ui[0] = (0xffu << 24) | (r << 16) | (g << 8) | b;
}
return;
case PIPE_FORMAT_ARGB8888_UNORM:
{
uc->ui[0] = (b << 24) | (g << 16) | (r << 8) | a;
}
return;
case PIPE_FORMAT_XRGB8888_UNORM:
{
uc->ui[0] = (b << 24) | (g << 16) | (r << 8) | 0xff;
}
return;
case PIPE_FORMAT_B5G6R5_UNORM:
{
uc->us = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3);
}
return;
case PIPE_FORMAT_B5G5R5X1_UNORM:
{
uc->us = ((0x80) << 8) | ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | (b >> 3);
}
return;
case PIPE_FORMAT_B5G5R5A1_UNORM:
{
uc->us = ((a & 0x80) << 8) | ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | (b >> 3);
}
return;
case PIPE_FORMAT_B4G4R4A4_UNORM:
{
uc->us = ((a & 0xf0) << 8) | ((r & 0xf0) << 4) | ((g & 0xf0) << 0) | (b >> 4);
}
return;
case PIPE_FORMAT_A8_UNORM:
{
uc->ub = a;
}
return;
case PIPE_FORMAT_L8_UNORM:
case PIPE_FORMAT_I8_UNORM:
{
uc->ub = r;
}
return;
case PIPE_FORMAT_R32G32B32A32_FLOAT:
{
uc->f[0] = rgba[0];
uc->f[1] = rgba[1];
uc->f[2] = rgba[2];
uc->f[3] = rgba[3];
}
return;
case PIPE_FORMAT_R32G32B32_FLOAT:
{
uc->f[0] = rgba[0];
uc->f[1] = rgba[1];
uc->f[2] = rgba[2];
}
return;
/* Handle other cases with a generic function.
*/
default:
util_format_pack_rgba(format, uc, rgba, 1);
}
}
static inline void
util_pack_color_union(enum pipe_format format,
union util_color *dst,
const union pipe_color_union *src)
{
util_format_pack_rgba(format, dst, &src->ui, 1);
}
/* Integer versions of util_pack_z and util_pack_z_stencil - useful for
* constructing clear masks.
*/
static inline uint32_t
util_pack_mask_z(enum pipe_format format, uint32_t z)
{
switch (format) {
case PIPE_FORMAT_Z16_UNORM:
return z & 0xffff;
case PIPE_FORMAT_Z32_UNORM:
case PIPE_FORMAT_Z32_FLOAT:
return z;
case PIPE_FORMAT_Z24_UNORM_S8_UINT:
case PIPE_FORMAT_Z24X8_UNORM:
return z & 0xffffff;
case PIPE_FORMAT_S8_UINT_Z24_UNORM:
case PIPE_FORMAT_X8Z24_UNORM:
return (z & 0xffffff) << 8;
case PIPE_FORMAT_S8_UINT:
return 0;
default:
debug_printf("gallium: unhandled format in util_pack_mask_z(): %s\n",
util_format_name(format));
assert(0);
return 0;
}
}
static inline uint64_t
util_pack64_mask_z(enum pipe_format format, uint32_t z)
{
switch (format) {
case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
return z;
default:
return util_pack_mask_z(format, z);
}
}
static inline uint32_t
util_pack_mask_z_stencil(enum pipe_format format, uint32_t z, uint8_t s)
{
uint32_t packed = util_pack_mask_z(format, z);
switch (format) {
case PIPE_FORMAT_Z24_UNORM_S8_UINT:
packed |= (uint32_t)s << 24;
break;
case PIPE_FORMAT_S8_UINT_Z24_UNORM:
packed |= s;
break;
case PIPE_FORMAT_S8_UINT:
packed |= s;
break;
default:
break;
}
return packed;
}
static inline uint64_t
util_pack64_mask_z_stencil(enum pipe_format format, uint32_t z, uint8_t s)
{
uint64_t packed;
switch (format) {
case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
packed = util_pack64_mask_z(format, z);
packed |= (uint64_t)s << 32ull;
return packed;
default:
return util_pack_mask_z_stencil(format, z, s);
}
}
/**
* Note: it's assumed that z is in [0,1]
*/
static inline uint32_t
util_pack_z(enum pipe_format format, double z)
{
union fi fui;
if (format == PIPE_FORMAT_Z32_FLOAT) {
fui.f = (float)z;
return fui.ui;
}
if (z <= 0.0)
return 0;
switch (format) {
case PIPE_FORMAT_Z16_UNORM:
if (z >= 1.0)
return 0xffff;
return (uint32_t) lrint(z * 0xffff);
case PIPE_FORMAT_Z32_UNORM:
/* special-case to avoid overflow */
if (z >= 1.0)
return 0xffffffff;
return (uint32_t) llrint(z * 0xffffffff);
case PIPE_FORMAT_Z24_UNORM_S8_UINT:
case PIPE_FORMAT_Z24X8_UNORM:
if (z >= 1.0)
return 0xffffff;
return (uint32_t) lrint(z * 0xffffff);
case PIPE_FORMAT_S8_UINT_Z24_UNORM:
case PIPE_FORMAT_X8Z24_UNORM:
if (z >= 1.0)
return 0xffffff00;
return ((uint32_t) lrint(z * 0xffffff)) << 8;
case PIPE_FORMAT_S8_UINT:
/* this case can get it via util_pack_z_stencil() */
return 0;
default:
debug_printf("gallium: unhandled format in util_pack_z(): %s\n",
util_format_name(format));
assert(0);
return 0;
}
}
static inline uint64_t
util_pack64_z(enum pipe_format format, double z)
{
union fi fui;
if (z == 0)
return 0;
switch (format) {
case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
fui.f = (float)z;
return fui.ui;
default:
return util_pack_z(format, z);
}
}
/**
* Pack Z and/or stencil values into a 32-bit value described by format.
* Note: it's assumed that z is in [0,1] and s in [0,255]
*/
static inline uint32_t
util_pack_z_stencil(enum pipe_format format, double z, uint8_t s)
{
uint32_t packed = util_pack_z(format, z);
switch (format) {
case PIPE_FORMAT_Z24_UNORM_S8_UINT:
packed |= (uint32_t)s << 24;
break;
case PIPE_FORMAT_S8_UINT_Z24_UNORM:
packed |= s;
break;
case PIPE_FORMAT_S8_UINT:
packed |= s;
break;
default:
break;
}
return packed;
}
static inline uint64_t
util_pack64_z_stencil(enum pipe_format format, double z, uint8_t s)
{
uint64_t packed;
switch (format) {
case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
packed = util_pack64_z(format, z);
packed |= (uint64_t)s << 32ull;
break;
default:
return util_pack_z_stencil(format, z, s);
}
return packed;
}
/**
* Pack 4 uint8_ts into a 4-byte word
*/
static inline uint32_t
pack_ub4(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3)
{
return ((((uint32_t)b0) << 0) |
(((uint32_t)b1) << 8) |
(((uint32_t)b2) << 16) |
(((uint32_t)b3) << 24));
}
/**
* Pack/convert 4 floats into one 4-byte word.
*/
static inline uint32_t
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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