/**************************************************************************
*
* Copyright 2009-2010 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"
#include "util/u_debug.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Describe how to pack/unpack pixels into/from the prescribed format.
*
* XXX: This could be renamed to something like util_format_pack, or broke down
* in flags inside util_format_block that said exactly what we want.
*/
enum util_format_layout {
/**
* Formats with util_format_block::width == util_format_block::height == 1
* that can be described as an ordinary data structure.
*/
UTIL_FORMAT_LAYOUT_PLAIN = 0,
/**
* Formats with sub-sampled channels.
*
* This is for formats like YVYU where there is less than one sample per
* pixel.
*/
UTIL_FORMAT_LAYOUT_SUBSAMPLED = 3,
/**
* S3 Texture Compression formats.
*/
UTIL_FORMAT_LAYOUT_S3TC = 4,
/**
* Red-Green Texture Compression formats.
*/
UTIL_FORMAT_LAYOUT_RGTC = 5,
/**
* Ericsson Texture Compression
*/
UTIL_FORMAT_LAYOUT_ETC = 6,
/**
* Everything else that doesn't fit in any of the above layouts.
*/
UTIL_FORMAT_LAYOUT_OTHER = 7
};
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,
UTIL_FORMAT_SWIZZLE_MAX = 7 /**< Number of enums counter (must be last) */
};
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:5; /**< UTIL_FORMAT_TYPE_x */
unsigned normalized:1;
unsigned pure_integer:1;
unsigned size:9; /**< bits per channel */
};
struct util_format_description
{
enum pipe_format format;
const char *name;
/**
* Short name, striped of the prefix, lower case.
*/
const char *short_name;
/**
* Pixel block dimensions.
*/
struct util_format_block block;
enum util_format_layout layout;
/**
* The number of channels.
*/
unsigned nr_channels:3;
/**
* Whether all channels have the same number of (whole) bytes.
*/
unsigned is_array:1;
/**
* Whether the pixel format can be described as a bitfield structure.
*
* In particular:
* - pixel depth must be 8, 16, or 32 bits;
* - all channels must be unsigned, signed, or void
*/
unsigned is_bitmask:1;
/**
* Whether channels have mixed types (ignoring UTIL_FORMAT_TYPE_VOID).
*/
unsigned is_mixed:1;
/**
* Input channel description.
*
* Only valid for UTIL_FORMAT_LAYOUT_PLAIN formats.
*/
struct util_format_channel_description channel[4];
/**
* Output channel swizzle.
*
* The order is either:
* - RGBA
* - YUV(A)
* - ZS
* depending on the colorspace.
*/
unsigned char swizzle[4];
/**
* Colorspace transformation.
*/
enum util_format_colorspace colorspace;
/**
* Unpack pixel blocks to R8G8B8A8_UNORM.
* Note: strides are in bytes.
*
* Only defined for non-depth-stencil formats.
*/
void
(*unpack_rgba_8unorm)(uint8_t *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Pack pixel blocks from R8G8B8A8_UNORM.
* Note: strides are in bytes.
*
* Only defined for non-depth-stencil formats.
*/
void
(*pack_rgba_8unorm)(uint8_t *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Fetch a single pixel (i, j) from a block.
*
* XXX: Only defined for a very few select formats.
*/
void
(*fetch_rgba_8unorm)(uint8_t *dst,
const uint8_t *src,
unsigned i, unsigned j);
/**
* Unpack pixel blocks to R32G32B32A32_FLOAT.
* Note: strides are in bytes.
*
* Only defined for non-depth-stencil formats.
*/
void
(*unpack_rgba_float)(float *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Pack pixel blocks from R32G32B32A32_FLOAT.
* Note: strides are in bytes.
*
* Only defined for non-depth-stencil formats.
*/
void
(*pack_rgba_float)(uint8_t *dst, unsigned dst_stride,
const float *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Fetch a single pixel (i, j) from a block.
*
* Only defined for non-depth-stencil and non-integer formats.
*/
void
(*fetch_rgba_float)(float *dst,
const uint8_t *src,
unsigned i, unsigned j);
/**
* Unpack pixels to Z32_UNORM.
* Note: strides are in bytes.
*
* Only defined for depth formats.
*/
void
(*unpack_z_32unorm)(uint32_t *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Pack pixels from Z32_FLOAT.
* Note: strides are in bytes.
*
* Only defined for depth formats.
*/
void
(*pack_z_32unorm)(uint8_t *dst, unsigned dst_stride,
const uint32_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Unpack pixels to Z32_FLOAT.
* Note: strides are in bytes.
*
* Only defined for depth formats.
*/
void
(*unpack_z_float)(float *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Pack pixels from Z32_FLOAT.
* Note: strides are in bytes.
*
* Only defined for depth formats.
*/
void
(*pack_z_float)(uint8_t *dst, unsigned dst_stride,
const float *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Unpack pixels to S8_UINT.
* Note: strides are in bytes.
*
* Only defined for stencil formats.
*/
void
(*unpack_s_8uint)(uint8_t *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Pack pixels from S8_UINT.
* Note: strides are in bytes.
*
* Only defined for stencil formats.
*/
void
(*pack_s_8uint)(uint8_t *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Unpack pixel blocks to R32G32B32A32_UINT.
* Note: strides are in bytes.
*
* Only defined for INT formats.
*/
void
(*unpack_rgba_uint)(unsigned *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
void
(*pack_rgba_uint)(uint8_t *dst, unsigned dst_stride,
const unsigned *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Unpack pixel blocks to R32G32B32A32_SINT.
* Note: strides are in bytes.
*
* Only defined for INT formats.
*/
void
(*unpack_rgba_sint)(signed *dst, unsigned dst_stride,
const uint8_t *src, unsigned src_stride,
unsigned width, unsigned height);
void
(*pack_rgba_sint)(uint8_t *dst, unsigned dst_stride,
const int *src, unsigned src_stride,
unsigned width, unsigned height);
/**
* Fetch a single pixel (i, j) from a block.
*
* Only defined for unsigned (pure) integer formats.
*/
void
(*fetch_rgba_uint)(uint32_t *dst,
const uint8_t *src,
unsigned i, unsigned j);
/**
* Fetch a single pixel (i, j) from a block.
*
* Only defined for signed (pure) integer formats.
*/
void
(*fetch_rgba_sint)(int32_t *dst,
const uint8_t *src,
unsigned i, unsigned j);
};
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 const char *
util_format_name(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return "PIPE_FORMAT_???";
}
return desc->name;
}
static INLINE const char *
util_format_short_name(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return "???";
}
return desc->short_name;
}
/**
* Whether this format is plain, see UTIL_FORMAT_LAYOUT_PLAIN for more info.
*/
static INLINE boolean
util_format_is_plain(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
if (!format) {
return FALSE;
}
return desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ? TRUE : FALSE;
}
static INLINE boolean
util_format_is_compressed(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return FALSE;
}
switch (desc->layout) {
case UTIL_FORMAT_LAYOUT_S3TC:
case UTIL_FORMAT_LAYOUT_RGTC:
/* XXX add other formats in the future */
return TRUE;
default:
return FALSE;
}
}
static INLINE boolean
util_format_is_s3tc(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return FALSE;
}
return desc->layout == UTIL_FORMAT_LAYOUT_S3TC ? TRUE : FALSE;
}
static INLINE boolean
util_format_is_srgb(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
return desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB;
}
static INLINE boolean
util_format_has_depth(const struct util_format_description *desc)
{
return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
desc->swizzle[0] != UTIL_FORMAT_SWIZZLE_NONE;
}
static INLINE boolean
util_format_has_stencil(const struct util_format_description *desc)
{
return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
desc->swizzle[1] != UTIL_FORMAT_SWIZZLE_NONE;
}
static INLINE boolean
util_format_is_depth_or_stencil(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return FALSE;
}
return util_format_has_depth(desc) ||
util_format_has_stencil(desc);
}
static INLINE boolean
util_format_is_depth_and_stencil(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return FALSE;
}
return util_format_has_depth(desc) &&
util_format_has_stencil(desc);
}
/**
* Give the RGBA colormask of the channels that can be represented in this
* format.
*
* That is, the channels whose values are preserved.
*/
static INLINE unsigned
util_format_colormask(const struct util_format_description *desc)
{
unsigned colormask;
unsigned chan;
switch (desc->colorspace) {
case UTIL_FORMAT_COLORSPACE_RGB:
case UTIL_FORMAT_COLORSPACE_SRGB:
case UTIL_FORMAT_COLORSPACE_YUV:
colormask = 0;
for (chan = 0; chan < 4; ++chan) {
if (desc->swizzle[chan] < 4) {
colormask |= (1 << chan);
}
}
return colormask;
case UTIL_FORMAT_COLORSPACE_ZS:
return 0;
default:
assert(0);
return 0;
}
}
/**
* Checks if color mask covers every channel for the specified format
*
* @param desc a format description to check colormask with
* @param colormask a bit mask for channels, matches format of PIPE_MASK_RGBA
*/
static INLINE boolean
util_format_colormask_full(const struct util_format_description *desc, unsigned colormask)
{
return (~colormask & util_format_colormask(desc)) == 0;
}
boolean
util_format_is_float(enum pipe_format format);
boolean
util_format_is_rgb_no_alpha(enum pipe_format format);
boolean
util_format_is_luminance(enum pipe_format format);
boolean
util_format_is_luminance_alpha(enum pipe_format format);
boolean
util_format_is_intensity(enum pipe_format format);
boolean
util_format_is_pure_integer(enum pipe_format format);
boolean
util_format_is_pure_sint(enum pipe_format format);
boolean
util_format_is_pure_uint(enum pipe_format format);
/**
* Whether the format is a simple array format where all channels
* are of the same type and can be loaded from memory as a vector
*/
boolean
util_format_is_array(const struct util_format_description *desc);
/**
* Check if the src format can be blitted to the destination format with
* a simple memcpy. For example, blitting from RGBA to RGBx is OK, but not
* the reverse.
*/
boolean
util_is_format_compatible(const struct util_format_description *src_desc,
const struct util_format_description *dst_desc);
/**
* Whether the format is supported by Gallium for the given bindings.
* This covers S3TC textures and floating-point render targets.
*/
boolean
util_format_is_supported(enum pipe_format format, unsigned bind);
/**
* Whether this format is a rgab8 variant.
*
* That is, any format that matches the
*
* PIPE_FORMAT_?8?8?8?8_UNORM
*/
static INLINE boolean
util_format_is_rgba8_variant(const struct util_format_description *desc)
{
unsigned chan;
if(desc->block.width != 1 ||
desc->block.height != 1 ||
desc->block.bits != 32)
return FALSE;
for(chan = 0; chan < 4; ++chan) {
if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
return FALSE;
if(desc->channel[chan].size != 8)
return FALSE;
}
return TRUE;
}
/**
* Return total bits needed for the pixel format per block.
*/
static INLINE uint
util_format_get_blocksizebits(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return 0;
}
return desc->block.bits;
}
/**
* Return bytes per block (not pixel) for the given format.
*/
static INLINE uint
util_format_get_blocksize(enum pipe_format format)
{
uint bits = util_format_get_blocksizebits(format);
assert(bits % 8 == 0);
return bits / 8;
}
static INLINE uint
util_format_get_blockwidth(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return 1;
}
return desc->block.width;
}
static INLINE uint
util_format_get_blockheight(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(desc);
if (!desc) {
return 1;
}
return desc->block.height;
}
static INLINE unsigned
util_format_get_nblocksx(enum pipe_format format,
unsigned x)
{
unsigned blockwidth = util_format_get_blockwidth(format);
return (x + blockwidth - 1) / blockwidth;
}
static INLINE unsigned
util_format_get_nblocksy(enum pipe_format format,
unsigned y)
{
unsigned blockheight = util_format_get_blockheight(format);
return (y + blockheight - 1) / blockheight;
}
static INLINE unsigned
util_format_get_nblocks(enum pipe_format format,
unsigned width,
unsigned height)
{
return util_format_get_nblocksx(format, width) * util_format_get_nblocksy(format, height);
}
static INLINE size_t
util_format_get_stride(enum pipe_format format,
unsigned width)
{
return util_format_get_nblocksx(format, width) * util_format_get_blocksize(format);
}
static INLINE size_t
util_format_get_2d_size(enum pipe_format format,
size_t stride,
unsigned height)
{
return util_format_get_nblocksy(format, height) * stride;
}
static INLINE uint
util_format_get_component_bits(enum pipe_format format,
enum util_format_colorspace colorspace,
uint component)
{
const struct util_format_description *desc = util_format_description(format);
enum util_format_colorspace desc_colorspace;
assert(format);
if (!format) {
return 0;
}
assert(component < 4);
/* Treat RGB and SRGB as equivalent. */
if (colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
colorspace = UTIL_FORMAT_COLORSPACE_RGB;
}
if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
desc_colorspace = UTIL_FORMAT_COLORSPACE_RGB;
} else {
desc_colorspace = desc->colorspace;
}
if (desc_colorspace != colorspace) {
return 0;
}
switch (desc->swizzle[component]) {
case UTIL_FORMAT_SWIZZLE_X:
return desc->channel[0].size;
case UTIL_FORMAT_SWIZZLE_Y:
return desc->channel[1].size;
case UTIL_FORMAT_SWIZZLE_Z:
return desc->channel[2].size;
case UTIL_FORMAT_SWIZZLE_W:
return desc->channel[3].size;
default:
return 0;
}
}
static INLINE boolean
util_format_has_alpha(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
assert(format);
if (!format) {
return FALSE;
}
switch (desc->colorspace) {
case UTIL_FORMAT_COLORSPACE_RGB:
case UTIL_FORMAT_COLORSPACE_SRGB:
return desc->swizzle[3] != UTIL_FORMAT_SWIZZLE_1;
case UTIL_FORMAT_COLORSPACE_YUV:
return FALSE;
case UTIL_FORMAT_COLORSPACE_ZS:
return FALSE;
default:
assert(0);
return FALSE;
}
}
/**
* Given a linear RGB colorspace format, return the corresponding SRGB
* format, or PIPE_FORMAT_NONE if none.
*/
static INLINE enum pipe_format
util_format_srgb(enum pipe_format format)
{
switch (format) {
case PIPE_FORMAT_L8_UNORM:
return PIPE_FORMAT_L8_SRGB;
case PIPE_FORMAT_L8A8_UNORM:
return PIPE_FORMAT_L8A8_SRGB;
case PIPE_FORMAT_R8G8B8_UNORM:
return PIPE_FORMAT_R8G8B8_SRGB;
case PIPE_FORMAT_A8B8G8R8_UNORM:
return PIPE_FORMAT_A8B8G8R8_SRGB;
case PIPE_FORMAT_X8B8G8R8_UNORM:
return PIPE_FORMAT_X8B8G8R8_SRGB;
case PIPE_FORMAT_B8G8R8A8_UNORM:
return PIPE_FORMAT_B8G8R8A8_SRGB;
case PIPE_FORMAT_B8G8R8X8_UNORM:
return PIPE_FORMAT_B8G8R8X8_SRGB;
case PIPE_FORMAT_A8R8G8B8_UNORM:
return PIPE_FORMAT_A8R8G8B8_SRGB;
case PIPE_FORMAT_X8R8G8B8_UNORM:
return PIPE_FORMAT_X8R8G8B8_SRGB;
case PIPE_FORMAT_DXT1_RGB:
return PIPE_FORMAT_DXT1_SRGB;
case PIPE_FORMAT_DXT1_RGBA:
return PIPE_FORMAT_DXT1_SRGBA;
case PIPE_FORMAT_DXT3_RGBA:
return PIPE_FORMAT_DXT3_SRGBA;
case PIPE_FORMAT_DXT5_RGBA:
return PIPE_FORMAT_DXT5_SRGBA;
default:
return PIPE_FORMAT_NONE;
}
}
/**
* Given an sRGB format, return the corresponding linear colorspace format.
* For non sRGB formats, return the format unchanged.
*/
static INLINE enum pipe_format
util_format_linear(enum pipe_format format)
{
switch (format) {
case PIPE_FORMAT_L8_SRGB:
return PIPE_FORMAT_L8_UNORM;
case PIPE_FORMAT_L8A8_SRGB:
return PIPE_FORMAT_L8A8_UNORM;
case PIPE_FORMAT_R8G8B8_SRGB:
return PIPE_FORMAT_R8G8B8_UNORM;
case PIPE_FORMAT_A8B8G8R8_SRGB:
return PIPE_FORMAT_A8B8G8R8_UNORM;
case PIPE_FORMAT_X8B8G8R8_SRGB:
return PIPE_FORMAT_X8B8G8R8_UNORM;
case PIPE_FORMAT_B8G8R8A8_SRGB:
return PIPE_FORMAT_B8G8R8A8_UNORM;
case PIPE_FORMAT_B8G8R8X8_SRGB:
return PIPE_FORMAT_B8G8R8X8_UNORM;
case PIPE_FORMAT_A8R8G8B8_SRGB:
return PIPE_FORMAT_A8R8G8B8_UNORM;
case PIPE_FORMAT_X8R8G8B8_SRGB:
return PIPE_FORMAT_X8R8G8B8_UNORM;
case PIPE_FORMAT_DXT1_SRGB:
return PIPE_FORMAT_DXT1_RGB;
case PIPE_FORMAT_DXT1_SRGBA:
return PIPE_FORMAT_DXT1_RGBA;
case PIPE_FORMAT_DXT3_SRGBA:
return PIPE_FORMAT_DXT3_RGBA;
case PIPE_FORMAT_DXT5_SRGBA:
return PIPE_FORMAT_DXT5_RGBA;
default:
return format;
}
}
/**
* Given a depth-stencil format, return the corresponding stencil-only format.
* For stencil-only formats, return the format unchanged.
*/
static INLINE enum pipe_format
util_format_stencil_only(enum pipe_format format)
{
switch (format) {
/* mask out the depth component */
case PIPE_FORMAT_Z24_UNORM_S8_UINT:
return PIPE_FORMAT_X24S8_UINT;
case PIPE_FORMAT_S8_UINT_Z24_UNORM:
return PIPE_FORMAT_S8X24_UINT;
case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
return PIPE_FORMAT_X32_S8X24_UINT;
/* stencil only formats */
case PIPE_FORMAT_X24S8_UINT:
case PIPE_FORMAT_S8X24_UINT:
case PIPE_FORMAT_X32_S8X24_UINT:
case PIPE_FORMAT_S8_UINT:
return format;
default:
assert(0);
return PIPE_FORMAT_NONE;
}
}
/**
* Return the number of components stored.
* Formats with block size != 1x1 will always have 1 component (the block).
*/
static INLINE unsigned
util_format_get_nr_components(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
return desc->nr_channels;
}
/**
* Return the index of the first non-void channel
* -1 if no non-void channels
*/
static INLINE int
util_format_get_first_non_void_channel(enum pipe_format format)
{
const struct util_format_description *desc = util_format_description(format);
int i;
for (i = 0; i < 4; i++)
if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID)
break;
if (i == 4)
return -1;
return i;
}
/*
* 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);
void
util_format_read_4ui(enum pipe_format format,
unsigned *dst, unsigned dst_stride,
const void *src, unsigned src_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
void
util_format_write_4ui(enum pipe_format format,
const unsigned int *src, unsigned src_stride,
void *dst, unsigned dst_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
void
util_format_read_4i(enum pipe_format format,
int *dst, unsigned dst_stride,
const void *src, unsigned src_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
void
util_format_write_4i(enum pipe_format format,
const int *src, unsigned src_stride,
void *dst, unsigned dst_stride,
unsigned x, unsigned y, unsigned w, unsigned h);
/*
* Generic format conversion;
*/
boolean
util_format_fits_8unorm(const struct util_format_description *format_desc);
void
util_format_translate(enum pipe_format dst_format,
void *dst, unsigned dst_stride,
unsigned dst_x, unsigned dst_y,
enum pipe_format src_format,
const void *src, unsigned src_stride,
unsigned src_x, unsigned src_y,
unsigned width, unsigned height);
/*
* Swizzle operations.
*/
/* Compose two sets of swizzles.
* If V is a 4D vector and the function parameters represent functions that
* swizzle vector components, this holds:
* swz2(swz1(V)) = dst(V)
*/
void util_format_compose_swizzles(const unsigned char swz1[4],
const unsigned char swz2[4],
unsigned char dst[4]);
void util_format_swizzle_4f(float *dst, const float *src,
const unsigned char swz[4]);
void util_format_unswizzle_4f(float *dst, const float *src,
const unsigned char swz[4]);
#ifdef __cplusplus
} // extern "C" {
#endif
#endif /* ! U_FORMAT_H */