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authorwolfbeast <mcwerewolf@gmail.com>2018-06-07 15:53:37 +0200
committerwolfbeast <mcwerewolf@gmail.com>2018-06-07 15:53:37 +0200
commitcd4da92df48738574c832d9badefd9c542fc6149 (patch)
tree645f48ad2b1892ed64bb9b1eeacd61e5a23994b6 /gfx/2d
parentf3657d6b4d4b30574a43a886bed6945590bf1508 (diff)
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Improve the SSSE3 scaler.
Diffstat (limited to 'gfx/2d')
-rw-r--r--gfx/2d/ssse3-scaler.c16
-rw-r--r--gfx/2d/ssse3-scaler.h4
2 files changed, 18 insertions, 2 deletions
diff --git a/gfx/2d/ssse3-scaler.c b/gfx/2d/ssse3-scaler.c
index 345844b84..745f58f6f 100644
--- a/gfx/2d/ssse3-scaler.c
+++ b/gfx/2d/ssse3-scaler.c
@@ -37,6 +37,7 @@
#include <tmmintrin.h>
#include <stdint.h>
#include <assert.h>
+#include "ssse3-scaler.h"
typedef int32_t pixman_fixed_16_16_t;
typedef pixman_fixed_16_16_t pixman_fixed_t;
@@ -44,6 +45,8 @@ typedef pixman_fixed_16_16_t pixman_fixed_t;
#define pixman_fixed_to_int(f) ((int) ((f) >> 16))
#define pixman_int_to_fixed(i) ((pixman_fixed_t) ((i) << 16))
#define pixman_double_to_fixed(d) ((pixman_fixed_t) ((d) * 65536.0))
+#define PIXMAN_FIXED_INT_MAX 32767
+#define PIXMAN_FIXED_INT_MIN -32768
typedef struct pixman_vector pixman_vector_t;
typedef int pixman_bool_t;
@@ -463,6 +466,12 @@ ssse3_bilinear_cover_iter_init (pixman_iter_t *iter)
bilinear_info_t *info;
pixman_vector_t v;
+ if (iter->x > PIXMAN_FIXED_INT_MAX ||
+ iter->x < PIXMAN_FIXED_INT_MIN ||
+ iter->y > PIXMAN_FIXED_INT_MAX ||
+ iter->y < PIXMAN_FIXED_INT_MIN)
+ goto fail;
+
/* Reference point is the center of the pixel */
v.vector[0] = pixman_int_to_fixed (iter->x) + pixman_fixed_1 / 2;
v.vector[1] = pixman_int_to_fixed (iter->y) + pixman_fixed_1 / 2;
@@ -505,7 +514,7 @@ fail:
/* scale the src from src_width/height to dest_width/height drawn
* into the rectangle x,y width,height
* src_stride and dst_stride are 4 byte units */
-void ssse3_scale_data(uint32_t *src, int src_width, int src_height, int src_stride,
+bool ssse3_scale_data(uint32_t *src, int src_width, int src_height, int src_stride,
uint32_t *dest, int dest_width, int dest_height,
int dest_stride,
int x, int y,
@@ -551,6 +560,10 @@ void ssse3_scale_data(uint32_t *src, int src_width, int src_height, int src_stri
iter.data = NULL;
ssse3_bilinear_cover_iter_init(&iter);
+
+ if (!iter.fini)
+ return false;
+
if (iter.data) {
for (int iy = 0; iy < height; iy++) {
ssse3_fetch_bilinear_cover(&iter, NULL);
@@ -558,4 +571,5 @@ void ssse3_scale_data(uint32_t *src, int src_width, int src_height, int src_stri
}
ssse3_bilinear_cover_iter_fini(&iter);
}
+ return true;
}
diff --git a/gfx/2d/ssse3-scaler.h b/gfx/2d/ssse3-scaler.h
index b3b53ed64..ea8d8a066 100644
--- a/gfx/2d/ssse3-scaler.h
+++ b/gfx/2d/ssse3-scaler.h
@@ -6,10 +6,12 @@
#ifndef MOZILLA_GFX_2D_SSSE3_SCALER_H_
#define MOZILLA_GFX_2D_SSSE3_SCALER_H_
+#include <stdbool.h>
+
#ifdef __cplusplus
extern "C" {
#endif
-void ssse3_scale_data(uint32_t *src, int src_width, int src_height,
+bool ssse3_scale_data(uint32_t *src, int src_width, int src_height,
int src_stride,
uint32_t *dest, int dest_width, int dest_height,
int dest_rowstride,