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comparison src/http/modules/ngx_http_image_filter_module.c @ 3133:28a6aa24b453

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fix alpha-channel transparency in PNG
author Igor Sysoev <igor@sysoev.ru>
date Tue, 15 Sep 2009 09:47:12 +0000
parents e2a510ac53db
children e6f5cb5eff8b
comparison
equal deleted inserted replaced
3132:6cb238e091a9 3133:28a6aa24b453
766 if (dst == NULL) { 766 if (dst == NULL) {
767 gdImageDestroy(src); 767 gdImageDestroy(src);
768 return NULL; 768 return NULL;
769 } 769 }
770 770
771 if (colors == 0) {
772 gdImageSaveAlpha(dst, 1);
773 gdImageAlphaBlending(dst, 0);
774 }
775
771 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy); 776 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
772 777
773 gdImageDestroy(src); 778 gdImageDestroy(src);
774 779
775 } else { 780 } else {
807 oy /= 2; 812 oy /= 2;
808 813
809 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, 814 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
810 "image crop: %d x %d @ %d x %d", 815 "image crop: %d x %d @ %d x %d",
811 dx, dy, ox, oy); 816 dx, dy, ox, oy);
817
818 if (colors == 0) {
819 gdImageSaveAlpha(dst, 1);
820 gdImageAlphaBlending(dst, 0);
821 }
812 822
813 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy); 823 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy);
814 824
815 gdImageDestroy(src); 825 gdImageDestroy(src);
816 } 826 }