mirror of
https://salsa.debian.org/xorg-team/lib/pixman
synced 2025-08-31 01:15:49 +00:00
b455496890
Previously, this function would do coordinate calculations in such a way that (x_dst, y_dst) would only affect the alignment of the source image, but not of the traps, which would always be considered to be in absolute destination coordinates. This is unlike the pixman_image_composite() function which also registers the mask to the destination. This patch makes it so that traps are also offset by (x_dst, y_dst). Also add a comment explaining how this function is supposed to operate, and update tri-test.c and composite-trap-test.c to deal with the new semantics.
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "../test/utils.h"
|
|
#include "gtk-utils.h"
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
#define WIDTH 200
|
|
#define HEIGHT 200
|
|
|
|
#define POINT(x,y) \
|
|
{ pixman_double_to_fixed ((x)), pixman_double_to_fixed ((y)) }
|
|
|
|
pixman_image_t *src_img, *dest_img;
|
|
pixman_triangle_t tris[4] =
|
|
{
|
|
{ POINT (100, 100), POINT (10, 50), POINT (110, 10) },
|
|
{ POINT (100, 100), POINT (150, 10), POINT (200, 50) },
|
|
{ POINT (100, 100), POINT (10, 170), POINT (90, 175) },
|
|
{ POINT (100, 100), POINT (170, 150), POINT (120, 190) },
|
|
};
|
|
pixman_color_t color = { 0x4444, 0x4444, 0xffff, 0xffff };
|
|
uint32_t *bits = malloc (WIDTH * HEIGHT * 4);
|
|
int i;
|
|
|
|
for (i = 0; i < WIDTH * HEIGHT; ++i)
|
|
bits[i] = (i / HEIGHT) * 0x01010000;
|
|
|
|
src_img = pixman_image_create_solid_fill (&color);
|
|
dest_img = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, bits, WIDTH * 4);
|
|
|
|
pixman_composite_triangles (PIXMAN_OP_ATOP_REVERSE,
|
|
src_img,
|
|
dest_img,
|
|
PIXMAN_a8,
|
|
200, 200,
|
|
-5, 5,
|
|
ARRAY_LENGTH (tris), tris);
|
|
show_image (dest_img);
|
|
|
|
pixman_image_unref (src_img);
|
|
pixman_image_unref (dest_img);
|
|
free (bits);
|
|
|
|
return 0;
|
|
}
|