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buffer-png.c
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buffer-png.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <wayland-client.h>
#include <cairo.h>
#include "display.h"
#include "buffer.h"
#include "buffer-png.h"
struct buffer *buffer_create_from_png(struct display *display, char *path)
{
cairo_surface_t *surface = NULL;
struct buffer *buffer = NULL;
unsigned int width;
unsigned int height;
unsigned int stride;
unsigned int y;
void *data;
surface = cairo_image_surface_create_from_png(path);
if (!surface)
goto error;
data = cairo_image_surface_get_data(surface);
width = cairo_image_surface_get_width(surface);
height = cairo_image_surface_get_height(surface);
stride = cairo_image_surface_get_stride(surface);
buffer = buffer_create(display, width, height);
for (y = 0; y < height; y++)
memcpy(buffer->data + y * buffer->stride,
data + y * stride, width * sizeof(uint32_t));
cairo_surface_destroy(surface);
return buffer;
error:
if (surface)
cairo_surface_destroy(surface);
if (buffer)
buffer_destroy(buffer);
return NULL;
}