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WIN32 platform: Fix drawing of depth-4 scaled image when can_do_alpha_blending() is false.

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12116 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Manolo Gouy
2016-11-17 13:52:16 +00:00
parent 10cddcd501
commit 4b6dfbfb4c
1 changed files with 2 additions and 1 deletions
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src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
+2 -1
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@@ -527,13 +527,14 @@ int Fl_GDI_Printer_Graphics_Driver::draw_scaled(Fl_Image *img, int XP, int YP, i
int Fl_GDI_Graphics_Driver::draw_scaled(Fl_Image *img, int XP, int YP, int WP, int HP) { int Fl_GDI_Graphics_Driver::draw_scaled(Fl_Image *img, int XP, int YP, int WP, int HP) {
Fl_RGB_Image *rgb = img->as_rgb_image(); Fl_RGB_Image *rgb = img->as_rgb_image();
if (!rgb || !rgb->array) return 0; // for bitmaps and pixmaps if (!rgb || !rgb->array) return 0; // for bitmaps and pixmaps
if ((rgb->d() % 2) == 0 && !can_do_alpha_blending()) return 0;
if (!*Fl_Graphics_Driver::id(rgb)) *Fl_Graphics_Driver::id(rgb) = (fl_uintptr_t)build_id(rgb, if (!*Fl_Graphics_Driver::id(rgb)) *Fl_Graphics_Driver::id(rgb) = (fl_uintptr_t)build_id(rgb,
(void**)(Fl_Graphics_Driver::mask(rgb))); (void**)(Fl_Graphics_Driver::mask(rgb)));
HDC new_gc = CreateCompatibleDC(gc_); HDC new_gc = CreateCompatibleDC(gc_);
int save = SaveDC(new_gc); int save = SaveDC(new_gc);
SelectObject(new_gc, (HBITMAP)*Fl_Graphics_Driver::id(rgb)); SelectObject(new_gc, (HBITMAP)*Fl_Graphics_Driver::id(rgb));
if ((img->d() % 2) == 0 && can_do_alpha_blending()) { if ( (rgb->d() % 2) == 0 ) {
alpha_blend_(XP, YP, WP, HP, new_gc, 0, 0, rgb->w(), rgb->h()); alpha_blend_(XP, YP, WP, HP, new_gc, 0, 0, rgb->w(), rgb->h());
} else { } else {
SetStretchBltMode(gc_, HALFTONE); SetStretchBltMode(gc_, HALFTONE);