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WinRT: added rotation support to SDL_RenderCopyEx via D3D 11.1

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This commit is contained in:
David Ludwig 2013-04-02 00:09:49 -04:00
parent 5230205e27
commit b7887dd326
3 changed files with 41 additions and 17 deletions
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47
src/render/direct3d11/SDL_render_d3d11.cpp
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@ -1129,6 +1129,11 @@ D3D11_UpdateViewport(SDL_Renderer * renderer)
data->vertexShaderConstantsData.view = XMMatrixIdentity();
#endif
//
// Reset the model matrix
//
XMStoreFloat4x4(&data->vertexShaderConstantsData.model, XMMatrixIdentity());
//
// Update the Direct3D viewport, which seems to be aligned to the
// swap buffer's coordinate space, which is always in landscape:
@ -1250,15 +1255,6 @@ D3D11_RenderStartDrawOp(SDL_Renderer * renderer)
rendererData->renderTargetView.GetAddressOf(),
nullptr
);
rendererData->d3dContext->UpdateSubresource(
rendererData->vertexShaderConstants.Get(),
0,
NULL,
&rendererData->vertexShaderConstantsData,
0,
0
);
}
static void
@ -1299,6 +1295,16 @@ D3D11_RenderFinishDrawOp(SDL_Renderer * renderer,
UINT vertexCount)
{
D3D11_RenderData *rendererData = (D3D11_RenderData *) renderer->driverdata;
rendererData->d3dContext->UpdateSubresource(
rendererData->vertexShaderConstants.Get(),
0,
NULL,
&rendererData->vertexShaderConstantsData,
0,
0
);
rendererData->d3dContext->IASetPrimitiveTopology(primitiveTopology);
rendererData->d3dContext->IASetInputLayout(rendererData->inputLayout.Get());
rendererData->d3dContext->VSSetShader(rendererData->vertexShader.Get(), nullptr, 0);
@ -1504,12 +1510,25 @@ D3D11_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
maxv = minv;
minv = tmp;
}
XMFLOAT4X4 oldModelMatrix = rendererData->vertexShaderConstantsData.model;
XMStoreFloat4x4(
&rendererData->vertexShaderConstantsData.model,
XMMatrixMultiply(
XMMatrixRotationZ((float)(XM_PI * (float) angle / 180.0f)),
XMMatrixTranslation(dstrect->x + center->x, dstrect->y + center->y, 0)
));
const float minx = -center->x;
const float maxx = dstrect->w - center->x;
const float miny = -center->y;
const float maxy = dstrect->h - center->y;
VertexPositionColor vertices[] = {
{XMFLOAT3(dstrect->x, dstrect->y, 0.0f), XMFLOAT2(minu, minv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
{XMFLOAT3(dstrect->x, dstrect->y + dstrect->h, 0.0f), XMFLOAT2(minu, maxv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
{XMFLOAT3(dstrect->x + dstrect->w, dstrect->y, 0.0f), XMFLOAT2(maxu, minv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
{XMFLOAT3(dstrect->x + dstrect->w, dstrect->y + dstrect->h, 0.0f), XMFLOAT2(maxu, maxv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
{XMFLOAT3(minx, miny, 0.0f), XMFLOAT2(minu, minv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
{XMFLOAT3(minx, maxy, 0.0f), XMFLOAT2(minu, maxv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
{XMFLOAT3(maxx, miny, 0.0f), XMFLOAT2(maxu, minv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
{XMFLOAT3(maxx, maxy, 0.0f), XMFLOAT2(maxu, maxv), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
};
if (D3D11_UpdateVertexBuffer(renderer, vertices, sizeof(vertices)) != 0) {
return -1;
@ -1522,6 +1541,8 @@ D3D11_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
rendererData->mainSampler.Get());
D3D11_RenderFinishDrawOp(renderer, D3D11_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP, sizeof(vertices) / sizeof(VertexPositionColor));
rendererData->vertexShaderConstantsData.model = oldModelMatrix;
return 0;
}