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-rw-r--r--libs/pixman-0.40.0/test/alphamap.c346
1 files changed, 346 insertions, 0 deletions
diff --git a/libs/pixman-0.40.0/test/alphamap.c b/libs/pixman-0.40.0/test/alphamap.c
new file mode 100644
index 0000000..150d33e
--- /dev/null
+++ b/libs/pixman-0.40.0/test/alphamap.c
@@ -0,0 +1,346 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "utils.h"
+
+#define WIDTH 48
+#define HEIGHT 48
+
+static const pixman_format_code_t formats[] =
+{
+ PIXMAN_a8r8g8b8,
+ PIXMAN_a2r10g10b10,
+ PIXMAN_a4r4g4b4,
+ PIXMAN_a8,
+ PIXMAN_rgba_float,
+};
+
+static const pixman_format_code_t alpha_formats[] =
+{
+ PIXMAN_null,
+ PIXMAN_a8,
+ PIXMAN_a2r10g10b10,
+ PIXMAN_a4r4g4b4,
+ PIXMAN_rgba_float,
+};
+
+static const int origins[] =
+{
+ 0, 10, -100
+};
+
+static void
+on_destroy (pixman_image_t *image, void *data)
+{
+ uint32_t *bits = pixman_image_get_data (image);
+
+ fence_free (bits);
+}
+
+static pixman_image_t *
+make_image (pixman_format_code_t format)
+{
+ uint32_t *bits;
+ uint8_t bpp = PIXMAN_FORMAT_BPP (format) / 8;
+ pixman_image_t *image;
+
+ if (format != PIXMAN_rgba_float)
+ bits = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * bpp);
+ else
+ bits = (uint32_t *)make_random_floats (WIDTH * HEIGHT * bpp);
+
+ image = pixman_image_create_bits (format, WIDTH, HEIGHT, bits, WIDTH * bpp);
+
+ if (image && bits)
+ pixman_image_set_destroy_function (image, on_destroy, NULL);
+
+ return image;
+}
+
+static float
+get_alpha (pixman_image_t *image, int x, int y, int orig_x, int orig_y)
+{
+ uint8_t *bits;
+ uint32_t r;
+
+ if (image->common.alpha_map)
+ {
+ if (x - orig_x >= 0 && x - orig_x < WIDTH &&
+ y - orig_y >= 0 && y - orig_y < HEIGHT)
+ {
+ image = (pixman_image_t *)image->common.alpha_map;
+
+ x -= orig_x;
+ y -= orig_y;
+ }
+ else
+ {
+ return 0.f;
+ }
+ }
+
+ bits = (uint8_t *)image->bits.bits;
+
+ if (image->bits.format == PIXMAN_a8)
+ {
+ r = bits[y * WIDTH + x];
+ return r / 255.f;
+ }
+ else if (image->bits.format == PIXMAN_a2r10g10b10)
+ {
+ r = ((uint32_t *)bits)[y * WIDTH + x] >> 30;
+ return r / 3.f;
+ }
+ else if (image->bits.format == PIXMAN_a8r8g8b8)
+ {
+ r = ((uint32_t *)bits)[y * WIDTH + x] >> 24;
+ return r / 255.f;
+ }
+ else if (image->bits.format == PIXMAN_a4r4g4b4)
+ {
+ r = ((uint16_t *)bits)[y * WIDTH + x] >> 12;
+ return r / 15.f;
+ }
+ else if (image->bits.format == PIXMAN_rgba_float)
+ {
+ return ((float *)bits)[y * WIDTH * 4 + x * 4 + 3];
+ }
+ else
+ {
+ assert (0);
+ return 0.f;
+ }
+}
+
+static uint16_t
+get_red (pixman_image_t *image, int x, int y, int orig_x, int orig_y)
+{
+ uint8_t *bits;
+ uint16_t r;
+
+ bits = (uint8_t *)image->bits.bits;
+
+ if (image->bits.format == PIXMAN_a8)
+ {
+ r = 0x00;
+ }
+ else if (image->bits.format == PIXMAN_a2r10g10b10)
+ {
+ r = ((uint32_t *)bits)[y * WIDTH + x] >> 14;
+ r &= 0xffc0;
+ r |= (r >> 10);
+ }
+ else if (image->bits.format == PIXMAN_a8r8g8b8)
+ {
+ r = ((uint32_t *)bits)[y * WIDTH + x] >> 16;
+ r &= 0xff;
+ r |= r << 8;
+ }
+ else if (image->bits.format == PIXMAN_a4r4g4b4)
+ {
+ r = ((uint16_t *)bits)[y * WIDTH + x] >> 8;
+ r &= 0xf;
+ r |= r << 4;
+ r |= r << 8;
+ }
+ else if (image->bits.format == PIXMAN_rgba_float)
+ {
+ double tmp = ((float *)bits)[y * WIDTH * 4 + x * 4];
+ return tmp * 65535.;
+ }
+ else
+ {
+ assert (0);
+ }
+
+ return r;
+}
+
+static float get_alpha_err(pixman_format_code_t sf, pixman_format_code_t saf,
+ pixman_format_code_t df, pixman_format_code_t daf)
+{
+ pixman_format_code_t s = saf != PIXMAN_null ? saf : sf;
+ pixman_format_code_t d = daf != PIXMAN_null ? daf : df;
+
+ /* There are cases where we go through the 8 bit compositing
+ * path even with 10bpc and higher formats.
+ */
+ if (PIXMAN_FORMAT_A(s) == PIXMAN_FORMAT_A(d))
+ return 1.f / 255.f;
+ else if (PIXMAN_FORMAT_A(s) > PIXMAN_FORMAT_A(d))
+ return 1.f / ((1 << PIXMAN_FORMAT_A(d)) - 1);
+ else
+ return 1.f / ((1 << PIXMAN_FORMAT_A(s)) - 1);
+}
+
+static int
+run_test (int s, int d, int sa, int da, int soff, int doff)
+{
+ pixman_format_code_t sf = formats[s];
+ pixman_format_code_t df = formats[d];
+ pixman_format_code_t saf = alpha_formats[sa];
+ pixman_format_code_t daf = alpha_formats[da];
+ pixman_image_t *src, *dst, *orig_dst, *alpha, *orig_alpha;
+ pixman_transform_t t1;
+ int j, k;
+ int n_red_bits;
+
+ soff = origins[soff];
+ doff = origins[doff];
+
+ n_red_bits = PIXMAN_FORMAT_R (df);
+
+ /* Source */
+ src = make_image (sf);
+ if (saf != PIXMAN_null)
+ {
+ alpha = make_image (saf);
+ pixman_image_set_alpha_map (src, alpha, soff, soff);
+ pixman_image_unref (alpha);
+ }
+
+ /* Destination */
+ orig_dst = make_image (df);
+ dst = make_image (df);
+ pixman_image_composite (PIXMAN_OP_SRC, orig_dst, NULL, dst,
+ 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+ if (daf != PIXMAN_null)
+ {
+ orig_alpha = make_image (daf);
+ alpha = make_image (daf);
+
+ pixman_image_composite (PIXMAN_OP_SRC, orig_alpha, NULL, alpha,
+ 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+ pixman_image_set_alpha_map (orig_dst, orig_alpha, doff, doff);
+ pixman_image_set_alpha_map (dst, alpha, doff, doff);
+
+ pixman_image_unref (orig_alpha);
+ pixman_image_unref (alpha);
+ }
+
+ /* Transformations, repeats and filters on destinations should be ignored,
+ * so just set some random ones.
+ */
+ pixman_transform_init_identity (&t1);
+ pixman_transform_scale (&t1, NULL, pixman_int_to_fixed (100), pixman_int_to_fixed (11));
+ pixman_transform_rotate (&t1, NULL, pixman_double_to_fixed (0.5), pixman_double_to_fixed (0.11));
+ pixman_transform_translate (&t1, NULL, pixman_int_to_fixed (11), pixman_int_to_fixed (17));
+
+ pixman_image_set_transform (dst, &t1);
+ pixman_image_set_filter (dst, PIXMAN_FILTER_BILINEAR, NULL, 0);
+ pixman_image_set_repeat (dst, PIXMAN_REPEAT_REFLECT);
+
+ pixman_image_composite (PIXMAN_OP_ADD, src, NULL, dst,
+ 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+ for (j = MAX (doff, 0); j < MIN (HEIGHT, HEIGHT + doff); ++j)
+ {
+ for (k = MAX (doff, 0); k < MIN (WIDTH, WIDTH + doff); ++k)
+ {
+ float sa, da, oda, refa;
+ uint16_t sr, dr, odr, refr;
+ float err;
+
+ err = get_alpha_err(sf, saf, df, daf);
+
+ sa = get_alpha (src, k, j, soff, soff);
+ da = get_alpha (dst, k, j, doff, doff);
+ oda = get_alpha (orig_dst, k, j, doff, doff);
+
+ if (sa + oda > 1.f)
+ refa = 1.f;
+ else
+ refa = sa + oda;
+
+ if (da - err > refa ||
+ da + err < refa)
+ {
+ printf ("\nWrong alpha value at (%d, %d). Should be %g; got %g. Source was %g, original dest was %g\n",
+ k, j, refa, da, sa, oda);
+
+ printf ("src: %s, alpha: %s, origin %d %d\ndst: %s, alpha: %s, origin: %d %d\n\n",
+ format_name (sf),
+ format_name (saf),
+ soff, soff,
+ format_name (df),
+ format_name (daf),
+ doff, doff);
+ return 1;
+ }
+
+ /* There are cases where we go through the 8 bit compositing
+ * path even with 10bpc formats. This results in incorrect
+ * results here, so only do the red check for narrow formats
+ */
+ if (n_red_bits <= 8)
+ {
+ sr = get_red (src, k, j, soff, soff);
+ dr = get_red (dst, k, j, doff, doff);
+ odr = get_red (orig_dst, k, j, doff, doff);
+
+ if (sr + odr > 0xffff)
+ refr = 0xffff;
+ else
+ refr = sr + odr;
+
+ if (abs ((dr >> (16 - n_red_bits)) - (refr >> (16 - n_red_bits))) > 1)
+ {
+ printf ("%d red bits\n", n_red_bits);
+ printf ("\nWrong red value at (%d, %d). Should be 0x%x; got 0x%x. Source was 0x%x, original dest was 0x%x\n",
+ k, j, refr, dr, sr, odr);
+
+ printf ("src: %s, alpha: %s, origin %d %d\ndst: %s, alpha: %s, origin: %d %d\n\n",
+ format_name (sf),
+ format_name (saf),
+ soff, soff,
+ format_name (df),
+ format_name (daf),
+ doff, doff);
+ return 1;
+ }
+ }
+ }
+ }
+
+ pixman_image_set_alpha_map (src, NULL, 0, 0);
+ pixman_image_set_alpha_map (dst, NULL, 0, 0);
+ pixman_image_set_alpha_map (orig_dst, NULL, 0, 0);
+
+ pixman_image_unref (src);
+ pixman_image_unref (dst);
+ pixman_image_unref (orig_dst);
+
+ return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+ int i, j, a, b, x, y;
+
+ prng_srand (0);
+
+ for (i = 0; i < ARRAY_LENGTH (formats); ++i)
+ {
+ for (j = 0; j < ARRAY_LENGTH (formats); ++j)
+ {
+ for (a = 0; a < ARRAY_LENGTH (alpha_formats); ++a)
+ {
+ for (b = 0; b < ARRAY_LENGTH (alpha_formats); ++b)
+ {
+ for (x = 0; x < ARRAY_LENGTH (origins); ++x)
+ {
+ for (y = 0; y < ARRAY_LENGTH (origins); ++y)
+ {
+ if (run_test (i, j, a, b, x, y) != 0)
+ return 1;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ return 0;
+}
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