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/*
* Copyright © 2009 Benjamin Otte
*
* 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, sublicense, 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 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* 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.
*
* Author: Benjamin Otte <otte@gnome.org>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "pixman-private.h"
#include <stdlib.h>
static uint32_t *
alloc_bits (pixman_format_code_t format,
int width,
int height,
uint32_t ** bits,
int * rowstrides_bytes)
{
int stride;
int buf_size;
int bpp;
/* what follows is a long-winded way, avoiding any possibility of integer
* overflows, of saying:
* stride = ((width * bpp + 0x1f) >> 5) * sizeof (uint32_t);
*/
bpp = PIXMAN_FORMAT_BPP (format);
assert (bpp > 0);
if (pixman_multiply_overflows_int (width, bpp))
return NULL;
stride = width * bpp;
if (pixman_addition_overflows_int (stride, 0x1f))
return NULL;
stride += 0x1f;
stride >>= 5;
stride *= sizeof (uint32_t);
if (pixman_multiply_overflows_int (height, stride))
return NULL;
buf_size = height * stride;
bits[0] = calloc (buf_size, 1);
rowstrides_bytes[0] = stride;
return bits[0];
}
static uint32_t *
alloc_y444 (pixman_format_code_t format,
int width,
int height,
uint32_t ** bits,
int * rowstrides_bytes)
{
int stride, bytes_per_plane;
if (pixman_addition_overflows_int (width, 3))
return NULL;
stride = ROUND_UP_4 (width);
if (pixman_multiply_overflows_int (stride, height))
return NULL;
bytes_per_plane = stride * height;
if (pixman_multiply_overflows_int (bytes_per_plane, 3))
return NULL;
bits[0] = calloc (bytes_per_plane, 3);
bits[1] = bits[0] + bytes_per_plane;
bits[2] = bits[1] + bytes_per_plane;
rowstrides_bytes[0] = stride;
rowstrides_bytes[1] = stride;
rowstrides_bytes[2] = stride;
return bits[0];
}
static uint32_t *
alloc_y422 (pixman_format_code_t format,
int width,
int height,
uint32_t ** bits,
int * rowstrides_bytes)
{
int y_stride, uv_stride;
if (pixman_addition_overflows_int (width, 7))
return NULL;
y_stride = ROUND_UP_4 (width);
uv_stride = ROUND_UP_8 (width) / 2;
if (pixman_addition_overflows_int (y_stride, 2 * uv_stride) ||
pixman_multiply_overflows_int (y_stride + 2 * uv_stride, height))
return NULL;
bits[0] = calloc (y_stride + 2 * uv_stride, height);
bits[1] = bits[0] + y_stride * height;
bits[2] = bits[1] + uv_stride * height;
rowstrides_bytes[0] = y_stride;
rowstrides_bytes[1] = uv_stride;
rowstrides_bytes[2] = uv_stride;
return bits[0];
}
typedef struct {
pixman_format_code_t format;
pixman_bool_t supported_source;
pixman_bool_t supported_destination;
pixman_bool_t alpha;
unsigned int num_planes;
pixman_color_space_t default_color_space;
uint32_t * (* alloc_bits) (pixman_format_code_t format,
int width,
int height,
uint32_t ** bits,
int * rowstrides_bytes);
} format_info_t;
static const format_info_t format_infos[] = {
{ PIXMAN_a2b10g10r10, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x2b10g10r10, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a2r10g10b10, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x2r10g10b10, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a8r8g8b8, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x8r8g8b8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a8b8g8r8, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x8b8g8r8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_b8g8r8a8, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_b8g8r8x8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_r8g8b8a8, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_r8g8b8x8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_r8g8b8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_b8g8r8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
/* 16 bpp formats */
{ PIXMAN_r5g6b5, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_b5g6r5, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a1r5g5b5, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x1r5g5b5, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a1b5g5r5, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x1b5g5r5, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a4r4g4b4, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x4r4g4b4, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a4b4g4r4, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x4b4g4r4, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
/* 8bpp formats */
{ PIXMAN_a8, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_r3g3b2, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_b2g3r3, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a2r2g2b2, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a2b2g2r2, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_c8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_g8, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_x4a4, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
/* Collides with PIXMAN_c8
{ PIXMAN_x4c4, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
*/
/* Collides with PIXMAN_g8
{ PIXMAN_x4g4, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
*/
/* 4bpp formats */
{ PIXMAN_a4, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_r1g2b1, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_b1g2r1, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a1r1g1b1, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_a1b1g1r1, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_c4, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_g4, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
/* 1bpp formats */
{ PIXMAN_a1, TRUE, TRUE, TRUE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
{ PIXMAN_g1, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits },
/* planar formats */
{ PIXMAN_y444, TRUE, TRUE, FALSE, 3, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_y444 },
{ PIXMAN_y422, TRUE, TRUE, FALSE, 3, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_y422 },
/* packed formats */
{ PIXMAN_yuy2, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_bits },
{ PIXMAN_yvyu, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_bits },
{ PIXMAN_uyvy, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_bits },
{ PIXMAN_vyuy, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_bits },
/* YUV formats */
{ PIXMAN_yv12, TRUE, FALSE, FALSE, 1, PIXMAN_COLOR_SPACE_ARGB, alloc_bits }
};
/* default values for "invalid" at the end */
static const format_info_t invalid_format =
{ 0, FALSE, FALSE, FALSE, 0, PIXMAN_COLOR_SPACE_ARGB, NULL };
static const format_info_t *
_get_format_info (pixman_format_code_t format)
{
unsigned int i;
for (i = 0; i < ARRAY_LENGTH (format_infos); i++) {
if (format_infos[i].format == format)
return &format_infos[i];
}
#if DEBUG
fprintf (stderr, "In %s: Invalid format code %u\n", FUNC, (unsigned) format);
#endif
return &invalid_format;
}
uint32_t *
_pixman_format_alloc_bits (pixman_format_code_t format,
int width,
int height,
uint32_t ** bits,
int * rowstrides)
{
static const format_info_t *info;
info = _get_format_info (format);
if (info->alloc_bits == NULL)
return NULL;
return info->alloc_bits (format, width, height, bits, rowstrides);
}
pixman_color_space_t
_pixman_format_get_default_color_space (pixman_format_code_t format)
{
return _get_format_info (format)->default_color_space;
}
/**
* pixman_format_supported_source:
* @format: A pixman_format_code_t format
*
* Return value: whether the provided format code is a supported
* format for a pixman surface used as a source in
* rendering.
*
* Currently, all pixman_format_code_t values are supported.
**/
PIXMAN_EXPORT pixman_bool_t
pixman_format_supported_source (pixman_format_code_t format)
{
return _get_format_info (format)->supported_source;
}
/**
* pixman_format_supported_destination:
* @format: A pixman_format_code_t format
*
* Return value: whether the provided format code is a supported
* format for a pixman surface used as a destination in
* rendering.
*
* Currently, all pixman_format_code_t values are supported
* except for the YUV formats.
**/
PIXMAN_EXPORT pixman_bool_t
pixman_format_supported_destination (pixman_format_code_t format)
{
return _get_format_info (format)->supported_destination;
}
/**
* pixman_format_num_planes:
* @format: A pixman_format_code_t format
*
* Returns value: the number of planes for the given format. If
* this number is different from 1, you must use
* pixman_image_create_planar() to create images in this format.
**/
PIXMAN_EXPORT unsigned int
pixman_format_num_planes (pixman_format_code_t format)
{
unsigned int num_planes;
num_planes = _get_format_info (format)->num_planes;
assert (num_planes <= PIXMAN_MAX_PLANES);
return num_planes;
}
/**
* pixman_format_is_opaque:
* @format: A pixman_format_code_t format
*
* Returns: TRUE if images in the given @format are guaranteed to
* be completely opaque
**/
PIXMAN_EXPORT pixman_bool_t
pixman_format_is_opaque (pixman_format_code_t format)
{
return !_get_format_info (format)->alpha;
}
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