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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"
/**
* 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;
/* XXX lots more cases to add */
default:
debug_printf("gallium: unhandled format in util_pack_color_ub()\n");
}
}
/**
* 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 */
UNCLAMPED_FLOAT_TO_UBYTE(r, rgba[0]);
UNCLAMPED_FLOAT_TO_UBYTE(g, rgba[1]);
UNCLAMPED_FLOAT_TO_UBYTE(b, rgba[2]);
UNCLAMPED_FLOAT_TO_UBYTE(a, 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_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_printf("gallium: unhandled format in util_pack_color()\n");
}
}
/**
* Note: it's assumed that z is in [0,1]
*/
static INLINE uint
util_pack_z(enum pipe_format format, double z)
{
switch (format) {
case PIPE_FORMAT_Z16_UNORM:
return (uint) (z * 0xffff);
case PIPE_FORMAT_Z32_UNORM:
/* special-case to avoid overflow */
if (z == 1.0)
return 0xffffffff;
else
return (uint) (z * 0xffffffff);
case PIPE_FORMAT_S8Z24_UNORM:
case PIPE_FORMAT_X8Z24_UNORM:
return (uint) (z * 0xffffff);
case PIPE_FORMAT_Z24S8_UNORM:
case PIPE_FORMAT_Z24X8_UNORM:
return ((uint) (z * 0xffffff)) << 8;
default:
debug_printf("gallium: unhandled format in util_pack_z()\n");
return 0;
}
}
#endif /* U_PACK_COLOR_H */
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