dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-16 13:59:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

fix some 'unsigned integer overflow' warnings in ubsan

Browse Source 
I couldn't find a safe way of fixing VP8GetSigned() so i just
used the big-hammer.

Change-Id: I1039bc00307d1c90c85909a458a4bc70670e48b7
This commit is contained in:
skal
2016-08-16 15:02:43 -07:00
committed by James Zern
parent 8a4ebc6ab0
commit 6ab496ed22
11 changed files with 56 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/dsp/lossless.c
View File

@ -245,9 +245,9 @@ void VP8LAddGreenToBlueAndRed_C(uint32_t* data, int num_pixels) {
}
}
static WEBP_INLINE uint32_t ColorTransformDelta(int8_t color_pred,
int8_t color) {
return (uint32_t)((int)(color_pred) * color) >> 5;
static WEBP_INLINE int ColorTransformDelta(int8_t color_pred,
int8_t color) {
return ((int)color_pred * color) >> 5;
}
static WEBP_INLINE void ColorCodeToMultipliers(uint32_t color_code,
@ -264,8 +264,8 @@ void VP8LTransformColorInverse_C(const VP8LMultipliers* const m, uint32_t* data,
const uint32_t argb = data[i];
const uint32_t green = argb >> 8;
const uint32_t red = argb >> 16;
uint32_t new_red = red;
uint32_t new_blue = argb;
int new_red = red;
int new_blue = argb;
new_red += ColorTransformDelta(m->green_to_red_, green);
new_red &= 0xff;
new_blue += ColorTransformDelta(m->green_to_blue_, green);