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/**************************************************************************
*
* Copyright 2009 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.
*
**************************************************************************/
#ifndef U_FORMAT_H
#define U_FORMAT_H
#include "pipe/p_format.h"
enum util_format_layout {
UTIL_FORMAT_LAYOUT_SCALAR = 0,
UTIL_FORMAT_LAYOUT_ARITH = 1,
UTIL_FORMAT_LAYOUT_ARRAY = 2,
UTIL_FORMAT_LAYOUT_YUV = 3,
UTIL_FORMAT_LAYOUT_DXT = 4
};
struct util_format_block
{
/** Block width in pixels */
unsigned width;
/** Block height in pixels */
unsigned height;
/** Block size in bits */
unsigned bits;
};
enum util_format_type {
UTIL_FORMAT_TYPE_VOID = 0,
UTIL_FORMAT_TYPE_UNSIGNED = 1,
UTIL_FORMAT_TYPE_SIGNED = 2,
UTIL_FORMAT_TYPE_FIXED = 3,
UTIL_FORMAT_TYPE_FLOAT = 4
};
enum util_format_swizzle {
UTIL_FORMAT_SWIZZLE_X = 0,
UTIL_FORMAT_SWIZZLE_Y = 1,
UTIL_FORMAT_SWIZZLE_Z = 2,
UTIL_FORMAT_SWIZZLE_W = 3,
UTIL_FORMAT_SWIZZLE_0 = 4,
UTIL_FORMAT_SWIZZLE_1 = 5,
UTIL_FORMAT_SWIZZLE_NONE = 6
};
enum util_format_colorspace {
UTIL_FORMAT_COLORSPACE_RGB = 0,
UTIL_FORMAT_COLORSPACE_SRGB = 1,
UTIL_FORMAT_COLORSPACE_YUV = 2,
UTIL_FORMAT_COLORSPACE_ZS = 3,
};
struct util_format_channel_description
{
unsigned type:6;
unsigned normalized:1;
unsigned size:9;
};
struct util_format_description
{
enum pipe_format format;
const char *name;
struct util_format_block block;
enum util_format_layout layout;
struct util_format_channel_description channel[4];
unsigned char swizzle[4];
enum util_format_colorspace colorspace;
};
extern const struct util_format_description
util_format_description_table[];
const struct util_format_description *
util_format_description(enum pipe_format format);
/*
* Format query functions.
*/
static INLINE boolean
util_format_is_compressed(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(format);
if (!format) {
return FALSE;
}
return desc->layout == UTIL_FORMAT_LAYOUT_DXT ? TRUE : FALSE;
}
static INLINE boolean
util_format_is_depth_or_stencil(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(format);
if (!format) {
return FALSE;
}
return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS ? TRUE : FALSE;
}
static INLINE boolean
util_format_is_depth_and_stencil(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(format);
if (!format) {
return FALSE;
}
if (desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS) {
return FALSE;
}
return (desc->swizzle[0] != UTIL_FORMAT_SWIZZLE_NONE &&
desc->swizzle[1] != UTIL_FORMAT_SWIZZLE_NONE) ? TRUE : FALSE;
}
/**
* Describe pixel format's block.
*
* @sa http://msdn2.microsoft.com/en-us/library/ms796147.aspx
*/
static INLINE void
util_format_get_block(enum pipe_format format,
struct pipe_format_block *block)
{
const struct util_format_description *desc = util_format_description(format);
assert(format);
if (!format) {
block->size = 0;
block->width = 1;
block->height = 1;
return;
}
block->size = desc->block.bits / 8;
block->width = desc->block.width;
block->height = desc->block.height;
}
/**
* Return total bits needed for the pixel format.
*/
static INLINE uint
util_format_get_bits(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(format);
if (!format) {
return 0;
}
return desc->block.bits / (desc->block.width * desc->block.height);
}
/**
* Return bytes per pixel for the given format.
*/
static INLINE uint
util_format_get_size(enum pipe_format format)
{
uint bits = util_format_get_bits(format);
assert(bits % 8 == 0);
return bits / 8;
}
/*
* Format access functions.
*/
void
util_format_read_4f(enum pipe_format format,
float *dst, unsigned dst_stride,
const void *src, unsigned src_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
void
util_format_write_4f(enum pipe_format format,
const float *src, unsigned src_stride,
void *dst, unsigned dst_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
void
util_format_read_4ub(enum pipe_format format,
uint8_t *dst, unsigned dst_stride,
const void *src, unsigned src_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
void
util_format_write_4ub(enum pipe_format format,
const uint8_t *src, unsigned src_stride,
void *dst, unsigned dst_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
#endif /* ! U_FORMAT_H */
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