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Windows: restore "checkers" app that was damaged after handling of issue #155.

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This commit is contained in:
ManoloFLTK 2021-01-25 18:57:50 +01:00
parent 7fdac3790a
commit 871e7063a2
1 changed files with 12 additions and 5 deletions
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17
src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
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@ -543,14 +543,21 @@ void Fl_GDI_Graphics_Driver::draw_rgb(Fl_RGB_Image *rgb, int XP, int YP, int WP,
int save = SaveDC(new_gc);
SelectObject(new_gc, (HBITMAP)*Fl_Graphics_Driver::id(rgb));
Wfull = W*(rgb->data_w()/float(Wfull)); Hfull = H*(rgb->data_h()/float(Hfull));
cx *= scale(); cy *= scale();
if (cx+Wfull > rgb->data_w()) Wfull = rgb->data_w()-cx;
if (cy+Hfull > rgb->data_h()) Hfull = rgb->data_h()-cy;
int cx2 = cx * scale(), cy2 = 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_(XP*scale(), YP*scale(), W, H, new_gc, cx, cy, Wfull, Hfull);
alpha_blend_(XP*scale(), YP*scale(), W, H, new_gc, cx*scaleW, cy*scaleH, Wfull, Hfull);
} else {
SetStretchBltMode(gc_, HALFTONE);
StretchBlt(gc_, XP*scale(), YP*scale(), W, H, new_gc, cx, cy, Wfull, Hfull, SRCCOPY);
StretchBlt(gc_, XP*scale(), YP*scale(), W, H, new_gc, cx*scaleW, cy*scaleH, Wfull, Hfull, SRCCOPY);
}
RestoreDC(new_gc, save);
DeleteDC(new_gc);