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use simple memcpy if png filter=0

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jarnoh 2018-07-26 17:37:50 +03:00
parent 7a02732eb3
commit 60a5755478
1 changed files with 8 additions and 0 deletions
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8
stb_image_write.h
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@ -998,6 +998,14 @@ static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int
int type = mymap[filter_type]; int type = mymap[filter_type];
unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y); unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y);
int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes;
// sorry for not optimizing the other paths
if(type==0)
{
memcpy(line_buffer, z, width*n);
return;
}
for (i = 0; i < n; ++i) { for (i = 0; i < n; ++i) {
switch (type) { switch (type) {
case 0: line_buffer[i] = z[i]; break; case 0: line_buffer[i] = z[i]; break;