174 lines
3.5 KiB
C
174 lines
3.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <config.h>
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#include "pixman-private.h"
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#include "pixman.h"
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#define FALSE 0
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#define TRUE 1
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/* Randomly decide between 32 and 16 bit
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*
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* Allocate bits with random width, stride and height
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*
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* Then make up some random offset (dx, dy)
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*
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* Then make an image with those values.
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*
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* Do this for both source and destination
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*
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* Composite them together using OVER.
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*
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* The bits in the source and the destination should have
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* recognizable colors so that the result can be verified.
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*
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* Ie., walk the bits and verify that they have been composited.
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*/
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static int
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get_rand (int bound)
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{
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return rand () % bound;
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}
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static pixman_image_t *
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make_image (int width, int height, pixman_bool_t src, int *rx, int *ry)
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{
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pixman_format_code_t format;
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pixman_image_t *image;
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pixman_region32_t region;
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uint8_t *bits;
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int stride;
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int bpp;
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int dx, dy;
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int i, j;
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if (src)
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format = PIXMAN_a8r8g8b8;
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else
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format = PIXMAN_r5g6b5;
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bpp = PIXMAN_FORMAT_BPP (format) / 8;
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stride = width + get_rand (width);
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stride += (stride & 1); /* Make it an even number */
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bits = malloc (height * stride * bpp);
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for (j = 0; j < height; ++j)
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{
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for (i = 0; i < width; ++i)
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{
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uint8_t *pixel = bits + (stride * j + i) * bpp;
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if (src)
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*(uint32_t *)pixel = 0x7f00007f;
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else
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*(uint16_t *)pixel = 0xf100;
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}
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}
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dx = dy = 0;
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dx = get_rand (500);
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dy = get_rand (500);
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if (!src)
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{
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/* Now simulate the bogus X server translations */
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bits -= (dy * stride + dx) * bpp;
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}
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image = pixman_image_create_bits (
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format, width, height, (uint32_t *)bits, stride * bpp);
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if (!src)
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{
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/* And add the bogus clip region */
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pixman_region32_init_rect (®ion, dx, dy, dx + width, dy + height);
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pixman_image_set_clip_region32 (image, ®ion);
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}
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pixman_image_set_source_clipping (image, TRUE);
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if (src)
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{
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pixman_transform_t trans;
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pixman_transform_init_identity (&trans);
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pixman_transform_translate (&trans,
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NULL,
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- pixman_int_to_fixed (width / 2),
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- pixman_int_to_fixed (height / 2));
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pixman_transform_scale (&trans,
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NULL,
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pixman_double_to_fixed (0.5),
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pixman_double_to_fixed (0.5));
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pixman_transform_translate (&trans,
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NULL,
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pixman_int_to_fixed (width / 2),
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pixman_int_to_fixed (height / 2));
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pixman_image_set_transform (image, &trans);
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pixman_image_set_filter (image, PIXMAN_FILTER_BILINEAR, NULL, 0);
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pixman_image_set_repeat (image, PIXMAN_REPEAT_PAD);
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}
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if (!src)
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{
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*rx = dx;
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*ry = dy;
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}
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else
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{
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*rx = *ry = 0;
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}
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return image;
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}
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int
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main ()
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{
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pixman_image_t *src, *dest;
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int src_x, src_y, dest_x, dest_y;
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int i, j;
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int width = get_rand (499) + 1;
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int height = get_rand (499) + 1;
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src = make_image (width, height, TRUE, &src_x, &src_y);
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dest = make_image (width, height, FALSE, &dest_x, &dest_y);
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pixman_image_composite (
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PIXMAN_OP_OVER, src, NULL, dest,
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src_x, src_y,
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-1, -1,
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dest_x, dest_y,
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width, height);
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for (i = 0; i < height; ++i)
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{
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for (j = 0; j < width; ++j)
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{
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uint8_t *bits = (uint8_t *)dest->bits.bits;
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int bpp = PIXMAN_FORMAT_BPP (dest->bits.format) / 8;
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int stride = dest->bits.rowstride * 4;
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uint8_t *pixel =
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bits + (i + dest_y) * stride + (j + dest_x) * bpp;
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if (*(uint16_t *)pixel != 0x788f)
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{
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printf ("bad pixel %x\n", *(uint16_t *)pixel);
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assert (*(uint16_t *)pixel == 0x788f);
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}
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}
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}
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return 0;
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}
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