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dwebp/WritePNG: mark png variables volatile

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these are used on both sides of the setjmp().

(cherry picked from commit 7a191398ca)

Change-Id: I4a789bfb3a5d56946a22286c5a140008d90e1ba2
This commit is contained in:
James Zern 2015-01-16 15:39:24 -08:00
parent 0a4391a196
commit b49a578135
1 changed files with 5 additions and 5 deletions
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10
examples/dwebp.c
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@ -193,8 +193,8 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = (buffer->colorspace == MODE_RGBA);
png_structp png;
png_infop info;
volatile png_structp png;
volatile png_infop info;
png_uint_32 y;
png = png_create_write_struct(PNG_LIBPNG_VER_STRING,
@ -204,11 +204,11 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
}
info = png_create_info_struct(png);
if (info == NULL) {
png_destroy_write_struct(&png, NULL);
png_destroy_write_struct((png_structpp)&png, NULL);
return 0;
}
if (setjmp(png_jmpbuf(png))) {
png_destroy_write_struct(&png, &info);
png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 0;
}
png_init_io(png, out_file);
@ -222,7 +222,7 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
png_write_rows(png, &row, 1);
}
png_write_end(png, info);
png_destroy_write_struct(&png, &info);
png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 1;
}
#else // !HAVE_WINCODEC_H && !WEBP_HAVE_PNG