// Create a pattern brush
HRESULT DemoApp::CreateGridPatternBrush(
ID2D1RenderTarget *pRenderTarget,
ID2D1BitmapBrush **ppBitmapBrush)
{
HRESULT hr = S_OK;
// Create a compaitble render target
ID2D1BitmapRenderTarget *pCompatibleRenderTarget = NULL;
hr = pRenderTarget->CreateCompatibleRenderTarget(D2D1::SizeF(10.f, 10.f), &pCompatibleRenderTarget);
if (SUCCEEDED(hr))
{
// Draw a pattern
ID2D1SolidColorBrush *pGridBrush = NULL;
hr = pCompatibleRenderTarget->CreateSolidColorBrush(
D2D1::ColorF(D2D1::ColorF(0.93f, 0.94f, 0.96f, 1.0f)),
&pGridBrush);
if (SUCCEEDED(hr))
{
pCompatibleRenderTarget->BeginDraw();
pCompatibleRenderTarget->FillRectangle(D2D1::RectF(0.0f, 0.0f, 10.0f, 1.0f), pGridBrush);
pCompatibleRenderTarget->FillRectangle(D2D1::RectF(0.0f, 0.1f, 1.0f, 10.0f), pGridBrush);
pCompatibleRenderTarget->EndDraw();
// Retrieve the bitmap from the render target
ID2D1Bitmap *pGridBitmap = NULL;
hr = pCompatibleRenderTarget->GetBitmap(&pGridBitmap);
if (SUCCEEDED(hr))
{
// Choose the filling mode for the bitmap brush
D2D1_BITMAP_BRUSH_PROPERTIES brushProperties =
D2D1::BitmapBrushProperties(D2D1_EXTEND_MODE_WRAP, D2D1_EXTEND_MODE_WRAP);
// Create the bitmap brush
hr = m_pRenderTarget->CreateBitmapBrush(pGridBitmap, brushProperties, ppBitmapBrush);
pGridBitmap->Release();
}
pGridBrush->Release();
}
pCompatibleRenderTarget->Release();
}
return hr;
}
// this imitates http://blogs.msdn.com/b/wpfsdk/archive/2006/10/26/uncommon-dialogs--font-chooser-and-color-picker-dialogs.aspx
static void drawGrid(ID2D1RenderTarget *rt, D2D1_RECT_F *fillRect)
{
D2D1_SIZE_F size;
D2D1_PIXEL_FORMAT pformat;
ID2D1BitmapRenderTarget *brt;
D2D1_COLOR_F color;
D2D1_BRUSH_PROPERTIES bprop;
ID2D1SolidColorBrush *brush;
D2D1_RECT_F rect;
ID2D1Bitmap *bitmap;
D2D1_BITMAP_BRUSH_PROPERTIES bbp;
ID2D1BitmapBrush *bb;
HRESULT hr;
// mind the divisions; they represent the fact the original uses a viewport
size.width = 100 / 10;
size.height = 100 / 10;
// yay more ABI bugs
pformat = rt->GetPixelFormat();
hr = rt->CreateCompatibleRenderTarget(&size, NULL,
&pformat, D2D1_COMPATIBLE_RENDER_TARGET_OPTIONS_NONE,
&brt);
if (hr != S_OK)
logHRESULT(L"error creating render target for grid", hr);
brt->BeginDraw();
color.r = 1.0;
color.g = 1.0;
color.b = 1.0;
color.a = 1.0;
brt->Clear(&color);
color = D2D1::ColorF(D2D1::ColorF::LightGray, 1.0);
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = 1.0;
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = brt->CreateSolidColorBrush(&color, &bprop, &brush);
if (hr != S_OK)
logHRESULT(L"error creating brush for grid", hr);
rect.left = 0;
rect.top = 0;
rect.right = 50 / 10;
rect.bottom = 50 / 10;
brt->FillRectangle(&rect, brush);
rect.left = 50 / 10;
rect.top = 50 / 10;
rect.right = 100 / 10;
rect.bottom = 100 / 10;
brt->FillRectangle(&rect, brush);
brush->Release();
hr = brt->EndDraw(NULL, NULL);
if (hr != S_OK)
logHRESULT(L"error finalizing render target for grid", hr);
hr = brt->GetBitmap(&bitmap);
if (hr != S_OK)
logHRESULT(L"error getting bitmap for grid", hr);
brt->Release();
ZeroMemory(&bbp, sizeof (D2D1_BITMAP_BRUSH_PROPERTIES));
bbp.extendModeX = D2D1_EXTEND_MODE_WRAP;
bbp.extendModeY = D2D1_EXTEND_MODE_WRAP;
bbp.interpolationMode = D2D1_BITMAP_INTERPOLATION_MODE_NEAREST_NEIGHBOR;
hr = rt->CreateBitmapBrush(bitmap, &bbp, &bprop, &bb);
if (hr != S_OK)
logHRESULT(L"error creating bitmap brush for grid", hr);
rt->FillRectangle(fillRect, bb);
bb->Release();
bitmap->Release();
}