You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
2.4 KiB
75 lines
2.4 KiB
/*
|
|
* Copyright 2021 Advanced Micro Devices, Inc.
|
|
* Copyright 2022 Collabora, Ltd.
|
|
*
|
|
* 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 (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
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include <pixman.h>
|
|
#include <assert.h>
|
|
|
|
/** A collection of basic information extracted from a pixman_image_t */
|
|
struct image_header {
|
|
int width;
|
|
int height;
|
|
pixman_format_code_t pixman_format;
|
|
|
|
int stride_bytes;
|
|
unsigned char *data;
|
|
};
|
|
|
|
/** Populate image_header from pixman_image_t */
|
|
static inline struct image_header
|
|
image_header_from(pixman_image_t *image)
|
|
{
|
|
struct image_header h;
|
|
|
|
h.width = pixman_image_get_width(image);
|
|
h.height = pixman_image_get_height(image);
|
|
h.pixman_format = pixman_image_get_format(image);
|
|
h.stride_bytes = pixman_image_get_stride(image);
|
|
h.data = (void *)pixman_image_get_data(image);
|
|
|
|
return h;
|
|
}
|
|
|
|
/** Get pointer to the beginning of the row
|
|
*
|
|
* \param header Header describing the Pixman image.
|
|
* \param y Index of the desired row, starting from zero.
|
|
* \return Pointer to the first pixel of the row.
|
|
*
|
|
* Asserts that y is within image height, and that pixel format uses 32 bits
|
|
* per pixel.
|
|
*/
|
|
static inline uint32_t *
|
|
image_header_get_row_u32(const struct image_header *header, int y)
|
|
{
|
|
assert(y >= 0);
|
|
assert(y < header->height);
|
|
assert(PIXMAN_FORMAT_BPP(header->pixman_format) == 32);
|
|
|
|
return (uint32_t *)(header->data + y * header->stride_bytes);
|
|
}
|
|
|