81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
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#include <stdlib.h>
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#include "utils.h"
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#define SOURCE_WIDTH 320
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#define SOURCE_HEIGHT 240
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#define TEST_REPEATS 3
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static pixman_image_t *
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make_source (void)
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{
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size_t n_bytes = (SOURCE_WIDTH + 2) * (SOURCE_HEIGHT + 2) * 4;
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uint32_t *data = malloc (n_bytes);
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pixman_image_t *source;
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prng_randmemset (data, n_bytes, 0);
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source = pixman_image_create_bits (
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PIXMAN_a8r8g8b8, SOURCE_WIDTH + 2, SOURCE_HEIGHT + 2,
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data,
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(SOURCE_WIDTH + 2) * 4);
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pixman_image_set_filter (source, PIXMAN_FILTER_BILINEAR, NULL, 0);
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return source;
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}
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int
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main ()
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{
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double scale;
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pixman_image_t *src;
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prng_srand (23874);
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src = make_source ();
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printf ("# %-6s %-22s %-14s %-12s\n",
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"ratio",
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"resolutions",
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"time / ms",
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"time per pixel / ns");
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for (scale = 0.1; scale < 10.005; scale += 0.01)
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{
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int i;
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int dest_width = SOURCE_WIDTH * scale + 0.5;
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int dest_height = SOURCE_HEIGHT * scale + 0.5;
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int dest_byte_stride = (dest_width * 4 + 15) & ~15;
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pixman_fixed_t s = (1 / scale) * 65536.0 + 0.5;
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pixman_transform_t transform;
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pixman_image_t *dest;
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double t1, t2, t = -1;
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uint32_t *dest_buf = aligned_malloc (16, dest_byte_stride * dest_height);
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memset (dest_buf, 0, dest_byte_stride * dest_height);
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pixman_transform_init_scale (&transform, s, s);
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pixman_image_set_transform (src, &transform);
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dest = pixman_image_create_bits (
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PIXMAN_a8r8g8b8, dest_width, dest_height, dest_buf, dest_byte_stride);
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for (i = 0; i < TEST_REPEATS; i++)
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{
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t1 = gettime();
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pixman_image_composite (
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PIXMAN_OP_OVER, src, NULL, dest,
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scale, scale, 0, 0, 0, 0, dest_width, dest_height);
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t2 = gettime();
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if (t < 0 || t2 - t1 < t)
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t = t2 - t1;
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}
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printf ("%6.2f : %4dx%-4d => %4dx%-4d : %12.4f : %12.4f\n",
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scale, SOURCE_WIDTH, SOURCE_HEIGHT, dest_width, dest_height,
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t * 1000, (t / (dest_width * dest_height)) * 1000000000);
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pixman_image_unref (dest);
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free (dest_buf);
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}
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return 0;
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}
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