mirrors/fltk
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Windows platform: accurate drawing area of RGB images with scaled GUI.

Browse Source
This commit is contained in:
ManoloFLTK 2021-03-02 12:11:08 +01:00
parent 42aa31b900
commit e19bfc0d8f
1 changed files with 7 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
View File

@ -536,25 +536,22 @@ void Fl_GDI_Graphics_Driver::draw_rgb(Fl_RGB_Image *rgb, int XP, int YP, int WP,
if (!*Fl_Graphics_Driver::id(rgb)) {
cache(rgb);
}
bool need_clip = (cx || cy || WP != rgb->w() || HP != rgb->h());
if (need_clip) {
push_clip(XP, YP, WP, HP);
XP -= cx; YP -= cy; cx = cy = 0; WP = rgb->w(); HP = rgb->h();
}
int W = WP, H = HP;
cache_size(rgb, W, H);
push_clip(XP, YP, WP, HP);
XP -= cx; YP -= cy;
WP = rgb->w(); HP = rgb->h();
cache_size(rgb, WP, HP);
HDC new_gc = CreateCompatibleDC(gc_);
int save = SaveDC(new_gc);
SelectObject(new_gc, (HBITMAP)*Fl_Graphics_Driver::id(rgb));
if ( (rgb->d() % 2) == 0 ) {
alpha_blend_(this->floor(XP), this->floor(YP), W, H, new_gc, 0, 0, rgb->data_w(), rgb->data_h());
alpha_blend_(this->floor(XP), this->floor(YP), WP, HP, new_gc, 0, 0, rgb->data_w(), rgb->data_h());
} else {
SetStretchBltMode(gc_, HALFTONE);
StretchBlt(gc_, this->floor(XP), this->floor(YP), W, H, new_gc, 0, 0, rgb->data_w(), rgb->data_h(), SRCCOPY);
StretchBlt(gc_, this->floor(XP), this->floor(YP), WP, HP, new_gc, 0, 0, rgb->data_w(), rgb->data_h(), SRCCOPY);
}
RestoreDC(new_gc, save);
DeleteDC(new_gc);
if (need_clip) pop_clip();
pop_clip();
}