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fix transparency in GIF

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This commit is contained in:
Igor Sysoev 2009-09-12 09:46:28 +00:00
parent 27aea8e769
commit ed3943c469
1 changed files with 14 additions and 2 deletions
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16
src/http/modules/ngx_http_image_filter_module.c
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@ -679,7 +679,7 @@ static ngx_buf_t *
ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
{
int sx, sy, dx, dy, ox, oy,
colors, transparent, size;
colors, transparent, red, green, blue, size;
u_char *out;
ngx_buf_t *b;
ngx_uint_t resize;
@ -708,6 +708,16 @@ ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
colors = gdImageColorsTotal(src);
transparent = gdImageGetTransparent(src);
if (transparent != -1 && colors) {
red = gdImageRed(src, transparent);
green = gdImageGreen(src, transparent);
blue = gdImageBlue(src, transparent);
gdImageColorTransparent(src, -1);
} else {
red = 0; green = 0; blue = 0;
}
dx = sx;
dy = sy;
@ -806,7 +816,9 @@ ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
}
}
gdImageColorTransparent(dst, transparent);
if (transparent != -1 && colors) {
gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue));
}
out = ngx_http_image_out(r, ctx->type, dst, &size);