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fix transparency in GIF
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96e36ef252
commit
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@ -679,7 +679,7 @@ static ngx_buf_t *
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ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
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{
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int sx, sy, dx, dy, ox, oy,
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colors, transparent, size;
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colors, transparent, red, green, blue, size;
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u_char *out;
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ngx_buf_t *b;
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ngx_uint_t resize;
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@ -708,6 +708,16 @@ ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
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colors = gdImageColorsTotal(src);
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transparent = gdImageGetTransparent(src);
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if (transparent != -1 && colors) {
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red = gdImageRed(src, transparent);
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green = gdImageGreen(src, transparent);
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blue = gdImageBlue(src, transparent);
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gdImageColorTransparent(src, -1);
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} else {
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red = 0; green = 0; blue = 0;
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}
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dx = sx;
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dy = sy;
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@ -806,7 +816,9 @@ ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
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}
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}
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gdImageColorTransparent(dst, transparent);
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if (transparent != -1 && colors) {
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gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue));
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}
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out = ngx_http_image_out(r, ctx->type, dst, &size);
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