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macOS: increase resolution when drawing window titlebars to PostScript

This commit is contained in:
ManoloFLTK 2020-09-19 15:25:50 +02:00
parent caf0bfa81d
commit 8ba68dd275
1 changed files with 8 additions and 6 deletions
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14
src/drivers/Cocoa/Fl_Cocoa_Window_Driver.cxx
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@ -320,17 +320,19 @@ void Fl_Cocoa_Window_Driver::capture_titlebar_and_borders(Fl_RGB_Image*& top, Fl
CGColorSpaceRef cspace = CGColorSpaceCreateDeviceRGB();
float s = Fl::screen_driver()->scale(screen_num());
int scaled_w = int(w() * s);
uchar *rgba = new uchar[4 * scaled_w * htop * 4];
CGContextRef auxgc = CGBitmapContextCreate(rgba, 2 * scaled_w, 2 * htop, 8, 8 * scaled_w, cspace, kCGImageAlphaPremultipliedLast);
const int factor = (layer ? 4 : 2); // resolution level for the titlebar (2 == retina's)
int data_w = factor * scaled_w, data_h = factor * htop;
uchar *rgba = new uchar[4 * data_w * data_h];
CGContextRef auxgc = CGBitmapContextCreate(rgba, data_w, data_h, 8, 4 * data_w, cspace, kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(cspace);
CGContextClearRect(auxgc, CGRectMake(0,0,2*scaled_w,2*htop));
CGContextScaleCTM(auxgc, 2, 2);
CGContextClearRect(auxgc, CGRectMake(0,0,data_w,data_h));
CGContextScaleCTM(auxgc, factor, factor);
if (layer) {
Fl_Cocoa_Window_Driver::draw_layer_to_context(layer, auxgc, scaled_w, htop);
if (fl_mac_os_version >= 101300) {
// drawn layer is left transparent and alpha-premultiplied: demultiply it and set it opaque.
uchar *p = rgba;
uchar *last = rgba + 4 * scaled_w * htop * 4;
uchar *last = rgba + data_w * data_h * 4;
while (p < last) {
uchar q = *(p+3);
if (q && q != 0xff) {
@ -352,7 +354,7 @@ void Fl_Cocoa_Window_Driver::capture_titlebar_and_borders(Fl_RGB_Image*& top, Fl
CGContextRestoreGState(auxgc);
CFRelease(img);
}
top = new Fl_RGB_Image(rgba, 2 * scaled_w, 2 * htop, 4);
top = new Fl_RGB_Image(rgba, data_w, data_h, 4);
top->alloc_array = 1;
top->scale(w(),htop, s <1 ? 0 : 1, 1);
CGContextRelease(auxgc);