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start working on API to draw bitmaps

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lay out emu thread
This commit is contained in:
StapleButter
2017-09-14 00:30:12 +02:00
parent 62a26977c7
commit f18690487c
4 changed files with 183 additions and 45 deletions
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54
src/libui_sdl/libui/windows/draw.cpp
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@ -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);
}