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Fix for issue #159.

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ManoloFLTK
2020-11-19 15:59:33 +01:00
parent 3ec51f0b80
commit e52e057cdf
2 changed files with 307 additions and 298 deletions
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src/drivers/X11/Fl_X11_Screen_Driver.cxx
+297 -298
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File diff suppressed because it is too large Load Diff
src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx
+10
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@@ -644,6 +644,16 @@ static void alpha_blend(Fl_RGB_Image *img, int X, int Y, int W, int H, int cx, i
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;
// don't attempt to read outside the window/offscreen buffer limits
Window root_return;
int x_return, y_return;
unsigned int winW, winH;
unsigned int border_width_return;
unsigned int depth_return;
XGetGeometry(fl_display, fl_window, &root_return, &x_return, &y_return, &winW,
&winH, &border_width_return, &depth_return);
if (X+W > winW) W = winW-X;
if (Y+H > winH) H = winH-Y;
if (W <= 0 || H <= 0) return;
int ld = img->ld();
if (ld == 0) ld = img->data_w() * img->d();