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Fix for issue #119. Drawing artefacts for SVG images without XRender.

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Xlib: Drawing SVG images in scaled mode without XRender has drawing artefacts.
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ManoloFLTK
2020-07-28 17:57:31 +02:00
parent b40e218c01
commit 41a6ade72b
1 changed files with 5 additions and 0 deletions
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src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx
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@@ -640,6 +640,11 @@ void Fl_Xlib_Graphics_Driver::draw_fixed(Fl_Bitmap *bm, int X, int Y, int W, int
// Composite an image with alpha on systems that don't have accelerated
// alpha compositing...
static void alpha_blend(Fl_RGB_Image *img, int X, int Y, int W, int H, int cx, int cy) {
if (cx < 0) { W += cx; X -= cx; cx = 0; }
if (cy < 0) { H += cy; Y -= cy; cy = 0; }
if (W + cx > img->data_w()) W = img->data_w() - cx;
if (H + cy > img->data_h()) H = img->data_h() - cy;
if (W <= 0 || H <= 0) return;
int ld = img->ld();
if (ld == 0) ld = img->data_w() * img->d();
uchar *srcptr = (uchar*)img->array + cy * ld + cx * img->d();