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fix d2d compile error and wrong background

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TODO:
for direct2d, why background is white if return after clear color and
data is null?
This commit is contained in:
wang-bin
2013-03-02 03:13:28 +08:00
parent 08d0664948
commit 080322fefd
3 changed files with 23 additions and 13 deletions
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src/Direct2DRenderer.cpp
+12 -3
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@@ -72,6 +72,7 @@ public:
}
bool createDeviceResource() {
DPTR_P(Direct2DRenderer);
update_background = true;
SafeRelease(&render_target); //force create a new one
//
// This method creates resources which are bound to a particular
@@ -191,12 +192,20 @@ void Direct2DRenderer::paintEvent(QPaintEvent *)
//http://www.daimakuai.net/?page_id=1574
d.render_target->BeginDraw();
d.render_target->SetTransform(D2D1::Matrix3x2F::Identity());
if (update_background || !d.bitmap) {
//The first bitmap size is 0x0, we should only draw the background
if ((d.update_background && d.out_rect != rect())|| d.data.isEmpty()) {
d.update_background = false;
//TODO: It seems that the target's background keeps the color even if resize without clear color
d.render_target->Clear(D2D1::ColorF(D2D1::ColorF::Black));
return;
//http://msdn.microsoft.com/en-us/library/windows/desktop/dd535473(v=vs.85).aspx
//ID2D1SolidColorBrush *brush;
//d.render_target->CreateSolidColorBrush(D2D1::ColorF(D2D1::ColorF::Black), &brush);
//d.render_target->FillRectangle(D2D1::RectF(0, 0, width(), height()), brush);
}
if (d.data.isEmpty()) {
//return; //why the background is whit if return? the below code draw an empty bitmap?
}
D2D1_RECT_F out_rect = {
d.out_rect.left(),
d.out_rect.top(),