pixman: Branch 'master'
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gitlab-mirror at kemper.freedesktop.org
Wed Jul 21 14:50:54 UTC 2021
pixman/pixman-bits-image.c | 24 +++++++++---------
pixman/pixman-filter.c | 31 ++++++++++++++++-------
test/scaling-test.c | 59 ++++++++++++++++++++++++++++++++++++---------
3 files changed, 82 insertions(+), 32 deletions(-)
New commits:
commit aaf59b0338fbd4b9142794254261f8d0a018b60c
Author: Heiko Lewin <hlewin at gmx.de>
Date: Wed Jul 21 14:50:52 2021 +0000
Fix signed-unsigned semantics in reduce_32
diff --git a/pixman/pixman-bits-image.c b/pixman/pixman-bits-image.c
index 4cfabe3..8f3d9f2 100644
--- a/pixman/pixman-bits-image.c
+++ b/pixman/pixman-bits-image.c
@@ -209,15 +209,15 @@ static force_inline void reduce_32(unsigned int satot, unsigned int srtot,
{
uint32_t *ret = p;
- satot = (satot + 0x8000) >> 16;
- srtot = (srtot + 0x8000) >> 16;
- sgtot = (sgtot + 0x8000) >> 16;
- sbtot = (sbtot + 0x8000) >> 16;
+ satot = (int32_t)(satot + 0x8000) / 65536;
+ srtot = (int32_t)(srtot + 0x8000) / 65536;
+ sgtot = (int32_t)(sgtot + 0x8000) / 65536;
+ sbtot = (int32_t)(sbtot + 0x8000) / 65536;
- satot = CLIP (satot, 0, 0xff);
- srtot = CLIP (srtot, 0, 0xff);
- sgtot = CLIP (sgtot, 0, 0xff);
- sbtot = CLIP (sbtot, 0, 0xff);
+ satot = CLIP ((int32_t)satot, 0, 0xff);
+ srtot = CLIP ((int32_t)srtot, 0, 0xff);
+ sgtot = CLIP ((int32_t)sgtot, 0, 0xff);
+ sbtot = CLIP ((int32_t)sbtot, 0, 0xff);
*ret = ((satot << 24) | (srtot << 16) | (sgtot << 8) | (sbtot));
}
@@ -240,10 +240,10 @@ static force_inline void reduce_float(unsigned int satot, unsigned int srtot,
{
argb_t *ret = p;
- ret->a = CLIP (satot / 65536.f, 0.f, 1.f);
- ret->r = CLIP (srtot / 65536.f, 0.f, 1.f);
- ret->g = CLIP (sgtot / 65536.f, 0.f, 1.f);
- ret->b = CLIP (sbtot / 65536.f, 0.f, 1.f);
+ ret->a = CLIP ((int32_t)satot / 65536.f, 0.f, 1.f);
+ ret->r = CLIP ((int32_t)srtot / 65536.f, 0.f, 1.f);
+ ret->g = CLIP ((int32_t)sgtot / 65536.f, 0.f, 1.f);
+ ret->b = CLIP ((int32_t)sbtot / 65536.f, 0.f, 1.f);
}
typedef void (* accumulate_pixel_t) (unsigned int *satot, unsigned int *srtot,
diff --git a/pixman/pixman-filter.c b/pixman/pixman-filter.c
index 5f3b752..fa94532 100644
--- a/pixman/pixman-filter.c
+++ b/pixman/pixman-filter.c
@@ -237,11 +237,14 @@ create_1d_filter (int width,
pixman_kernel_t sample,
double scale,
int n_phases,
- pixman_fixed_t *p)
+ pixman_fixed_t *pstart,
+ pixman_fixed_t *pend
+ )
{
+ pixman_fixed_t *p = pstart;
double step;
int i;
-
+ if(width <= 0) return;
step = 1.0 / n_phases;
for (i = 0; i < n_phases; ++i)
@@ -258,7 +261,7 @@ create_1d_filter (int width,
x1 = ceil (frac - width / 2.0 - 0.5);
x2 = x1 + width;
-
+ assert( p >= pstart && p + (x2 - x1) <= pend ); /* assert validity of the following loop */
total = 0;
for (x = x1; x < x2; ++x)
{
@@ -287,8 +290,10 @@ create_1d_filter (int width,
/* Normalize, with error diffusion */
p -= width;
- total = 65536.0 / total;
- new_total = 0;
+ assert(p >= pstart && p + (x2 - x1) <= pend); /* assert validity of the following loop */
+
+ total = 65536.0 / total;
+ new_total = 0;
e = 0.0;
for (x = x1; x < x2; ++x)
{
@@ -304,6 +309,8 @@ create_1d_filter (int width,
* at the first sample, since that is the only one that
* hasn't had any error diffused into it.
*/
+
+ assert(p - width >= pstart && p - width < pend); /* assert... */
*(p - width) += pixman_fixed_1 - new_total;
}
}
@@ -465,10 +472,16 @@ pixman_filter_create_separable_convolution (int *n_values,
params[2] = pixman_int_to_fixed (subsample_bits_x);
params[3] = pixman_int_to_fixed (subsample_bits_y);
- create_1d_filter (width, reconstruct_x, sample_x, sx, subsample_x,
- params + 4);
- create_1d_filter (height, reconstruct_y, sample_y, sy, subsample_y,
- params + 4 + width * subsample_x);
+ {
+ pixman_fixed_t
+ *xparams = params+4,
+ *yparams = xparams + width*subsample_x,
+ *endparams = params + *n_values;
+ create_1d_filter(width, reconstruct_x, sample_x, sx, subsample_x,
+ xparams, yparams);
+ create_1d_filter(height, reconstruct_y, sample_y, sy, subsample_y,
+ yparams, endparams);
+ }
#ifdef PIXMAN_GNUPLOT
gnuplot_filter(width, subsample_x, params + 4);
diff --git a/test/scaling-test.c b/test/scaling-test.c
index 0ece611..4c22011 100644
--- a/test/scaling-test.c
+++ b/test/scaling-test.c
@@ -45,6 +45,35 @@ get_format (int bpp)
}
}
+/* sets up "some kind of separable convolution" using prng values */
+void setup_separable_convulution(pixman_image_t* image, pixman_fixed_t scale_x, pixman_fixed_t scale_y, int verbose) {
+ int num_filters = PIXMAN_KERNEL_LANCZOS3_STRETCHED + 1;
+ int max_subsample_bits = 4;
+ struct Params {
+ pixman_fixed_t scale_x, scale_y;
+ pixman_kernel_t reconstruct_x, reconstruct_y;
+ pixman_kernel_t sample_x, sample_y;
+ int subsample_bits_x, subsample_bits_y;
+ } params = {
+ scale_x, scale_y,
+ prng_rand_n(num_filters), prng_rand_n(num_filters),
+ prng_rand_n(num_filters), prng_rand_n(num_filters),
+ prng_rand_n(max_subsample_bits + 1), prng_rand_n(max_subsample_bits + 1),
+ };
+ int num_params;
+ pixman_fixed_t *filter;
+ if(verbose) {
+ printf("separable convolution kernels=%d %d %d %d subsample_bits=%d %d\n", params.reconstruct_x, params.reconstruct_y, params.sample_x, params.sample_y, params.subsample_bits_x, params.subsample_bits_y);
+ }
+ filter = pixman_filter_create_separable_convolution(&num_params,
+ params.scale_x, params.scale_y,
+ params.reconstruct_x, params.reconstruct_y,
+ params.sample_x, params.sample_y,
+ params.subsample_bits_x, params.subsample_bits_y);
+ pixman_image_set_filter(image, PIXMAN_FILTER_SEPARABLE_CONVOLUTION, filter, num_params);
+ free(filter);
+}
+
uint32_t
test_composite (int testnum,
int verbose)
@@ -246,15 +275,23 @@ test_composite (int testnum,
}
pixman_image_set_repeat (src_img, repeat);
- if (prng_rand_n (2))
- pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
- else
- pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
+ switch (prng_rand_n (5)) {
+ case 0: pixman_image_set_filter(src_img, PIXMAN_FILTER_BILINEAR, NULL, 0); break;
+ case 1: pixman_image_set_filter(src_img, PIXMAN_FILTER_NEAREST, NULL, 0); break;
+ default:
+ /* this gets a larger range as samples distribute over quite a few possible settings */
+ setup_separable_convulution(src_img, scale_x, scale_y, verbose);
+ break;
+ }
- if (prng_rand_n (2))
- pixman_image_set_filter (mask_img, PIXMAN_FILTER_NEAREST, NULL, 0);
- else
- pixman_image_set_filter (mask_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
+ switch (prng_rand_n (5)) {
+ case 0: pixman_image_set_filter(mask_img, PIXMAN_FILTER_BILINEAR, NULL, 0); break;
+ case 1: pixman_image_set_filter(mask_img, PIXMAN_FILTER_NEAREST, NULL, 0); break;
+ default:
+ /* this gets a larger range as samples distribute over quite a few possible settings */
+ setup_separable_convulution(mask_img, scale_x, scale_y, verbose);
+ break;
+ }
if (prng_rand_n (8) == 0)
{
@@ -380,7 +417,7 @@ test_composite (int testnum,
src_x, src_y, mask_x, mask_y, dst_x, dst_y, w, h);
crc32 = compute_crc32_for_image (0, dst_img);
-
+
if (verbose)
print_image (dst_img);
@@ -407,9 +444,9 @@ test_composite (int testnum,
}
#if BILINEAR_INTERPOLATION_BITS == 7
-#define CHECKSUM 0x92E0F068
+#define CHECKSUM 0xD3589272
#elif BILINEAR_INTERPOLATION_BITS == 4
-#define CHECKSUM 0x8EFFA1E5
+#define CHECKSUM 0x0FD4B248
#else
#define CHECKSUM 0x00000000
#endif
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