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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);
}
}
/**
* 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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