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WinRT: implemented SDL_RenderSetClipRect for the d3d11 renderer
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@DavidLudwig
DavidLudwig committed Dec 26, 2013
1 parent 700f82d commit 7ef05d2
Showing 1 changed file with 79 additions and 33 deletions.
112 changes: 79 additions & 33 deletions src/render/direct3d11/SDL_render_d3d11.cpp
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Expand Up @@ -113,9 +113,13 @@ typedef struct
Microsoft::WRL::ComPtr<ID3D11BlendState> blendModeMod;
Microsoft::WRL::ComPtr<ID3D11SamplerState> nearestPixelSampler;
Microsoft::WRL::ComPtr<ID3D11SamplerState> linearSampler;
Microsoft::WRL::ComPtr<ID3D11RasterizerState> mainRasterizer;
D3D_FEATURE_LEVEL featureLevel;

// Rasterizers:
// If this list starts to get unwieldy, then consider using a map<> of them.
Microsoft::WRL::ComPtr<ID3D11RasterizerState> mainRasterizer;
Microsoft::WRL::ComPtr<ID3D11RasterizerState> clippedRasterizer;

// Vertex buffer constants:
VertexShaderConstants vertexShaderConstantsData;
Microsoft::WRL::ComPtr<ID3D11Buffer> vertexShaderConstants;
Expand Down Expand Up @@ -918,7 +922,7 @@ D3D11_CreateDeviceResources(SDL_Renderer * renderer)
}

//
// Setup the Direct3D rasterizer
// Setup Direct3D rasterizer states
//
D3D11_RASTERIZER_DESC rasterDesc;
memset(&rasterDesc, 0, sizeof(rasterDesc));
Expand All @@ -934,7 +938,14 @@ D3D11_CreateDeviceResources(SDL_Renderer * renderer)
rasterDesc.SlopeScaledDepthBias = 0.0f;
result = data->d3dDevice->CreateRasterizerState(&rasterDesc, &data->mainRasterizer);
if (FAILED(result)) {
WIN_SetErrorFromHRESULT(__FUNCTION__ ", ID3D11Device1::CreateRasterizerState", result);
WIN_SetErrorFromHRESULT(__FUNCTION__ ", ID3D11Device1::CreateRasterizerState [main rasterizer]", result);
return result;
}

rasterDesc.ScissorEnable = true;
result = data->d3dDevice->CreateRasterizerState(&rasterDesc, &data->clippedRasterizer);
if (FAILED(result)) {
WIN_SetErrorFromHRESULT(__FUNCTION__ ", ID3D11Device1::CreateRasterizerState [clipped rasterizer]", result);
return result;
}

Expand Down Expand Up @@ -1074,6 +1085,42 @@ D3D11_IsDisplayRotated90Degrees(Windows::Graphics::Display::DisplayOrientations
}
}

static int
D3D11_GetViewportAlignedD3DRect(SDL_Renderer * renderer, const SDL_Rect * sdlRect, D3D11_RECT * outRect)
{
D3D11_RenderData *data = (D3D11_RenderData *) renderer->driverdata;
switch (D3D11_GetRotationForOrientation(data-> orientation)) {
case DXGI_MODE_ROTATION_IDENTITY:
outRect->left = sdlRect->x;
outRect->right = sdlRect->x + sdlRect->w;
outRect->top = sdlRect->y;
outRect->bottom = sdlRect->y + sdlRect->h;
break;
case DXGI_MODE_ROTATION_ROTATE270:
outRect->left = sdlRect->y;
outRect->right = sdlRect->y + sdlRect->h;
outRect->top = renderer->viewport.w - sdlRect->x - sdlRect->w;
outRect->bottom = renderer->viewport.w - sdlRect->x;
break;
case DXGI_MODE_ROTATION_ROTATE180:
outRect->left = renderer->viewport.w - sdlRect->x - sdlRect->w;
outRect->right = renderer->viewport.w - sdlRect->x;
outRect->top = renderer->viewport.h - sdlRect->y - sdlRect->h;
outRect->bottom = renderer->viewport.h - sdlRect->y;
break;
case DXGI_MODE_ROTATION_ROTATE90:
outRect->left = renderer->viewport.h - sdlRect->y - sdlRect->h;
outRect->right = renderer->viewport.h - sdlRect->y;
outRect->top = sdlRect->x;
outRect->bottom = sdlRect->x + sdlRect->h;
break;
default:
return SDL_SetError("The physical display is in an unknown or unsupported orientation");
}
return 0;
}


// Initialize all resources that change when the window's size changes.
// TODO, WinRT: get D3D11_CreateWindowSizeDependentResources working on Win32
HRESULT
Expand Down Expand Up @@ -1738,7 +1785,20 @@ D3D11_UpdateViewport(SDL_Renderer * renderer)
static int
D3D11_UpdateClipRect(SDL_Renderer * renderer)
{
// TODO, WinRT: implement D3D11_UpdateClipRect
D3D11_RenderData *data = (D3D11_RenderData *) renderer->driverdata;
const SDL_Rect *rect = &renderer->clip_rect;

if (SDL_RectEmpty(rect)) {
data->d3dContext->RSSetScissorRects(0, 0);
} else {
D3D11_RECT scissorRect;
if (D3D11_GetViewportAlignedD3DRect(renderer, rect, &scissorRect) != 0) {
/* D3D11_GetViewportAlignedD3DRect will have set the SDL error */
return -1;
}
data->d3dContext->RSSetScissorRects(1, &scissorRect);
}

return 0;
}

Expand Down Expand Up @@ -1893,7 +1953,11 @@ D3D11_RenderFinishDrawOp(SDL_Renderer * renderer,
rendererData->d3dContext->IASetInputLayout(rendererData->inputLayout.Get());
rendererData->d3dContext->VSSetShader(rendererData->vertexShader.Get(), nullptr, 0);
rendererData->d3dContext->VSSetConstantBuffers(0, 1, rendererData->vertexShaderConstants.GetAddressOf());
rendererData->d3dContext->RSSetState(rendererData->mainRasterizer.Get());
if (SDL_RectEmpty(&(renderer->clip_rect))) {
rendererData->d3dContext->RSSetState(rendererData->mainRasterizer.Get());
} else {
rendererData->d3dContext->RSSetState(rendererData->clippedRasterizer.Get());
}
rendererData->d3dContext->Draw(vertexCount, 0);
}

Expand Down Expand Up @@ -2214,35 +2278,17 @@ D3D11_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
}

// Copy the desired portion of the back buffer to the staging texture:
D3D11_BOX srcBox;
switch (D3D11_GetRotationForOrientation(data->orientation)) {
case DXGI_MODE_ROTATION_IDENTITY:
srcBox.left = rect->x;
srcBox.right = rect->x + rect->w;
srcBox.top = rect->y;
srcBox.bottom = rect->y + rect->h;
break;
case DXGI_MODE_ROTATION_ROTATE270:
srcBox.left = rect->y;
srcBox.right = rect->y + rect->h;
srcBox.top = renderer->viewport.w - rect->x - rect->w;
srcBox.bottom = renderer->viewport.w - rect->x;
break;
case DXGI_MODE_ROTATION_ROTATE180:
srcBox.left = renderer->viewport.w - rect->x - rect->w;
srcBox.right = renderer->viewport.w - rect->x;
srcBox.top = renderer->viewport.h - rect->y - rect->h;
srcBox.bottom = renderer->viewport.h - rect->y;
break;
case DXGI_MODE_ROTATION_ROTATE90:
srcBox.left = renderer->viewport.h - rect->y - rect->h;
srcBox.right = renderer->viewport.h - rect->y;
srcBox.top = rect->x;
srcBox.bottom = rect->x + rect->h;
break;
default:
return SDL_SetError("The physical display is in an unknown or unsupported orientation");
D3D11_RECT srcRect;
if (D3D11_GetViewportAlignedD3DRect(renderer, rect, &srcRect) != 0) {
/* D3D11_GetViewportAlignedD3DRect will have set the SDL error */
return -1;
}

D3D11_BOX srcBox;
srcBox.left = srcRect.left;
srcBox.right = srcRect.right;
srcBox.top = srcRect.top;
srcBox.bottom = srcRect.bottom;
srcBox.front = 0;
srcBox.back = 1;
data->d3dContext->CopySubresourceRegion(
Expand Down

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