2 files changed, 61 insertions, 1 deletions

diff --git a/src/libui_sdl/libui/windows/draw.cpp b/src/libui_sdl/libui/windows/draw.cpp
index 5f4d29f..ad8ea96 100644
--- a/src/libui_sdl/libui/windows/draw.cpp
+++ b/src/libui_sdl/libui/windows/draw.cpp
@@ -38,7 +38,7 @@ ID2D1HwndRenderTarget *makeHWNDRenderTarget(HWND hwnd)
 		logLastError(L"error getting DC to find DPI");
 
 	ZeroMemory(&props, sizeof (D2D1_RENDER_TARGET_PROPERTIES));
-	props.type = D2D1_RENDER_TARGET_TYPE_DEFAULT;
+	props.type = D2D1_RENDER_TARGET_TYPE_HARDWARE;//DEFAULT;
 	props.pixelFormat.format = DXGI_FORMAT_UNKNOWN;
 	props.pixelFormat.alphaMode = D2D1_ALPHA_MODE_UNKNOWN;
 	props.dpiX = GetDeviceCaps(dc, LOGPIXELSX);
@@ -509,3 +509,55 @@ void uiDrawRestore(uiDrawContext *c)
 	// no need to explicitly addref or release; just transfer the ref
 	c->currentClip = state.clip;
 }
+
+
+// bitmap API
+
+uiDrawBitmap* uiDrawNewBitmap(uiDrawContext* c, int width, int height)
+{
+    uiDrawBitmap* bmp;
+    HRESULT hr;
+
+    bmp = uiNew(uiDrawBitmap);
+
+    D2D1_BITMAP_PROPERTIES bp2 = D2D1::BitmapProperties();
+    bp2.dpiX = 0;
+    bp2.dpiY = 0;
+    bp2.pixelFormat = D2D1::PixelFormat(DXGI_FORMAT_R8G8B8A8_UNORM, D2D1_ALPHA_MODE_IGNORE);
+    //bp2.pixelFormat = D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE);
+    // TODO: fallback: convert to BGRA if needed (RGBA only works in hardware mode)
+
+    c->rt->BeginDraw();
+
+    hr = c->rt->CreateBitmap(D2D1::SizeU(width,height), NULL, 0, &bp2, &bmp->bmp);
+    if (hr != S_OK)
+		logHRESULT(L"error creating bitmap", hr);
+
+    c->rt->EndDraw();
+
+    bmp->Width = width;
+    bmp->Height = height;
+    bmp->Stride = width*4;
+
+    return bmp;
+}
+
+void uiDrawBitmapUpdate(uiDrawBitmap* bmp, const void* data)
+{
+    D2D1_RECT_U rekt = D2D1::RectU(0, 0, bmp->Width, bmp->Height);
+    bmp->bmp->CopyFromMemory(&rekt, data, bmp->Stride);
+}
+
+void uiDrawBitmapDraw(uiDrawContext* c, uiDrawBitmap* bmp, uiRect* srcrect, uiRect* dstrect)
+{
+    D2D_RECT_F _srcrect = D2D1::RectF(srcrect->X, srcrect->Y, srcrect->X+srcrect->Width-1, srcrect->Y+srcrect->Height-1);
+    D2D_RECT_F _dstrect = D2D1::RectF(dstrect->X, dstrect->Y, dstrect->X+dstrect->Width-1, dstrect->Y+dstrect->Height-1);
+
+    c->rt->DrawBitmap(bmp->bmp, &_dstrect, 1.0f, D2D1_BITMAP_INTERPOLATION_MODE_LINEAR, &_srcrect);
+}
+
+void uiDrawFreeBitmap(uiDrawBitmap* bmp)
+{
+    bmp->bmp->Release();
+    uiFree(bmp);
+}
diff --git a/src/libui_sdl/libui/windows/draw.hpp b/src/libui_sdl/libui/windows/draw.hpp
index b015791..992d050 100644
--- a/src/libui_sdl/libui/windows/draw.hpp
+++ b/src/libui_sdl/libui/windows/draw.hpp
@@ -9,6 +9,14 @@ struct uiDrawContext {
 	ID2D1PathGeometry *currentClip;
 };
 
+struct uiDrawBitmap {
+    int Width;
+    int Height;
+    int Stride;
+
+    ID2D1Bitmap* bmp;
+};
+
 // drawpath.cpp
 extern ID2D1PathGeometry *pathGeometry(uiDrawPath *p);