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Simplify source code of Fl_GDI_Graphics_Driver::draw_rgb(Fl_RGB_Image *,…)

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This commit is contained in:
ManoloFLTK 2021-02-22 11:34:02 +01:00
parent dd75da6351
commit 28aaa4d4ce
1 changed files with 8 additions and 15 deletions
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23
src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
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@ -536,32 +536,25 @@ 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);
int Wfull = rgb->w(), Hfull = rgb->h();
cache_size(rgb, Wfull, Hfull);
HDC new_gc = CreateCompatibleDC(gc_);
int save = SaveDC(new_gc);
SelectObject(new_gc, (HBITMAP)*Fl_Graphics_Driver::id(rgb));
Wfull = int(W * (rgb->data_w() / float(Wfull))); Hfull = int(H * (rgb->data_h() / float(Hfull)));
int cx2 = int(cx * scale()), cy2 = int(cy * scale());
if (cx2+Wfull > rgb->data_w()) Wfull = rgb->data_w()-cx2;
if (cy2+Hfull > rgb->data_h()) Hfull = rgb->data_h()-cy2;
float scaleW = float(rgb->data_w())/rgb->w();
float scaleH = float(rgb->data_h())/rgb->h();
if (Wfull > int(WP*scaleW)) Wfull = int(WP*scaleW);
if (Hfull > int(HP*scaleH)) Hfull = int(HP*scaleH);
if (rgb->as_svg_image()) { // maintain precise aspect ratio for SVG images
float s = scale(); scale(1); cache_size(rgb, Wfull, Hfull); scale(s);
}
if ( (rgb->d() % 2) == 0 ) {
alpha_blend_(int(XP*scale()), int(YP*scale()), W, H, new_gc, int(cx*scaleW), int(cy*scaleH), Wfull, Hfull);
alpha_blend_(int(XP*scale()), int(YP*scale()), W, H, new_gc, 0, 0, rgb->data_w(), rgb->data_h());
} else {
SetStretchBltMode(gc_, HALFTONE);
StretchBlt(gc_, int(XP*scale()), int(YP*scale()), W, H, new_gc, int(cx*scaleW), int(cy*scaleH), Wfull, Hfull, SRCCOPY);
StretchBlt(gc_, int(XP*scale()), int(YP*scale()), W, H, new_gc, 0, 0, rgb->data_w(), rgb->data_h(), SRCCOPY);
}
RestoreDC(new_gc, save);
DeleteDC(new_gc);
if (need_clip) pop_clip();
}