void Clear11::clearFramebuffer(const gl::ClearParameters &clearParams, gl::Framebuffer *frameBuffer)
{
// First determine if a scissored clear is needed, this will always require drawing a quad.
//
// Otherwise, iterate over the color buffers which require clearing and determine if they can be
// cleared with ID3D11DeviceContext::ClearRenderTargetView... This requires:
// 1) The render target is being cleared to a float value (will be cast to integer when clearing integer
// render targets as expected but does not work the other way around)
// 2) The format of the render target has no color channels that are currently masked out.
// Clear the easy-to-clear buffers on the spot and accumulate the ones that require special work.
//
// Also determine if the depth stencil can be cleared with ID3D11DeviceContext::ClearDepthStencilView
// by checking if the stencil write mask covers the entire stencil.
//
// To clear the remaining buffers, quads must be drawn containing an int, uint or float vertex color
// attribute.
gl::Extents framebufferSize;
if (frameBuffer->getFirstColorbuffer() != NULL)
{
gl::Renderbuffer *renderBuffer = frameBuffer->getFirstColorbuffer();
framebufferSize.width = renderBuffer->getWidth();
framebufferSize.height = renderBuffer->getHeight();
framebufferSize.depth = 1;
}
else if (frameBuffer->getDepthOrStencilbuffer() != NULL)
{
gl::Renderbuffer *renderBuffer = frameBuffer->getDepthOrStencilbuffer();
framebufferSize.width = renderBuffer->getWidth();
framebufferSize.height = renderBuffer->getHeight();
framebufferSize.depth = 1;
}
else
{
UNREACHABLE();
return;
}
if (clearParams.scissorEnabled && (clearParams.scissor.x >= framebufferSize.width ||
clearParams.scissor.y >= framebufferSize.height ||
clearParams.scissor.x + clearParams.scissor.width <= 0 ||
clearParams.scissor.y + clearParams.scissor.height <= 0))
{
// Scissor is enabled and the scissor rectangle is outside the renderbuffer
return;
}
bool needScissoredClear = clearParams.scissorEnabled && (clearParams.scissor.x > 0 || clearParams.scissor.y > 0 ||
clearParams.scissor.x + clearParams.scissor.width < framebufferSize.width ||
clearParams.scissor.y + clearParams.scissor.height < framebufferSize.height);
GLuint clientVersion = mRenderer->getCurrentClientVersion();
std::vector<RenderTarget11*> maskedClearRenderTargets;
RenderTarget11* maskedClearDepthStencil = NULL;
ID3D11DeviceContext *deviceContext = mRenderer->getDeviceContext();
for (unsigned int colorAttachment = 0; colorAttachment < gl::IMPLEMENTATION_MAX_DRAW_BUFFERS; colorAttachment++)
{
if (clearParams.clearColor[colorAttachment] && frameBuffer->isEnabledColorAttachment(colorAttachment))
{
gl::Renderbuffer *renderbuffer = frameBuffer->getColorbuffer(colorAttachment);
if (renderbuffer)
{
RenderTarget11 *renderTarget = RenderTarget11::makeRenderTarget11(renderbuffer->getRenderTarget());
if (!renderTarget)
{
ERR("Render target pointer unexpectedly null.");
return;
}
GLenum internalFormat = renderbuffer->getInternalFormat();
GLenum actualFormat = renderbuffer->getActualFormat();
GLenum componentType = gl::GetComponentType(internalFormat, clientVersion);
if (clearParams.colorClearType == GL_FLOAT &&
!(componentType == GL_FLOAT || componentType == GL_UNSIGNED_NORMALIZED || componentType == GL_SIGNED_NORMALIZED))
{
ERR("It is undefined behaviour to clear a render buffer which is not normalized fixed point or floating-"
"point to floating point values (color attachment %u has internal format 0x%X).", colorAttachment, internalFormat);
}
GLuint internalRedBits = gl::GetRedBits(internalFormat, clientVersion);
GLuint internalGreenBits = gl::GetGreenBits(internalFormat, clientVersion);
GLuint internalBlueBits = gl::GetBlueBits(internalFormat, clientVersion);
GLuint internalAlphaBits = gl::GetAlphaBits(internalFormat, clientVersion);
if ((internalRedBits == 0 || !clearParams.colorMaskRed) &&
(internalGreenBits == 0 || !clearParams.colorMaskGreen) &&
(internalBlueBits == 0 || !clearParams.colorMaskBlue) &&
(internalAlphaBits == 0 || !clearParams.colorMaskAlpha))
{
// Every channel either does not exist in the render target or is masked out
continue;
}
else if (needScissoredClear || clearParams.colorClearType != GL_FLOAT ||
(internalRedBits > 0 && !clearParams.colorMaskRed) ||
(internalGreenBits > 0 && !clearParams.colorMaskGreen) ||
(internalBlueBits > 0 && !clearParams.colorMaskBlue) ||
(internalAlphaBits > 0 && !clearParams.colorMaskAlpha))
{
// A scissored or masked clear is required
maskedClearRenderTargets.push_back(renderTarget);
}
else
{
// ID3D11DeviceContext::ClearRenderTargetView is possible
ID3D11RenderTargetView *framebufferRTV = renderTarget->getRenderTargetView();
if (!framebufferRTV)
{
ERR("Render target view pointer unexpectedly null.");
return;
}
// Check if the actual format has a channel that the internal format does not and set them to the
// default values
GLuint actualRedBits = gl::GetRedBits(actualFormat, clientVersion);
GLuint actualGreenBits = gl::GetGreenBits(actualFormat, clientVersion);
GLuint actualBlueBits = gl::GetBlueBits(actualFormat, clientVersion);
GLuint actualAlphaBits = gl::GetAlphaBits(actualFormat, clientVersion);
const float clearValues[4] =
{
((internalRedBits == 0 && actualRedBits > 0) ? 0.0f : clearParams.colorFClearValue.red),
((internalGreenBits == 0 && actualGreenBits > 0) ? 0.0f : clearParams.colorFClearValue.green),
((internalBlueBits == 0 && actualBlueBits > 0) ? 0.0f : clearParams.colorFClearValue.blue),
((internalAlphaBits == 0 && actualAlphaBits > 0) ? 1.0f : clearParams.colorFClearValue.alpha),
};
deviceContext->ClearRenderTargetView(framebufferRTV, clearValues);
}
}
}
}
if (clearParams.clearDepth || clearParams.clearStencil)
{
gl::Renderbuffer *renderbuffer = frameBuffer->getDepthOrStencilbuffer();
if (renderbuffer)
{
RenderTarget11 *renderTarget = RenderTarget11::makeRenderTarget11(renderbuffer->getDepthStencil());
if (!renderTarget)
{
ERR("Depth stencil render target pointer unexpectedly null.");
return;
}
GLenum actualFormat = renderbuffer->getActualFormat();
unsigned int stencilUnmasked = frameBuffer->hasStencil() ? (1 << gl::GetStencilBits(actualFormat, clientVersion)) - 1 : 0;
bool needMaskedStencilClear = clearParams.clearStencil && (clearParams.stencilWriteMask & stencilUnmasked) != stencilUnmasked;
if (needScissoredClear || needMaskedStencilClear)
{
maskedClearDepthStencil = renderTarget;
}
else
{
ID3D11DepthStencilView *framebufferDSV = renderTarget->getDepthStencilView();
if (!framebufferDSV)
{
ERR("Depth stencil view pointer unexpectedly null.");
return;
}
UINT clearFlags = (clearParams.clearDepth ? D3D11_CLEAR_DEPTH : 0) |
(clearParams.clearStencil ? D3D11_CLEAR_STENCIL : 0);
FLOAT depthClear = gl::clamp01(clearParams.depthClearValue);
UINT8 stencilClear = clearParams.stencilClearValue & 0xFF;
deviceContext->ClearDepthStencilView(framebufferDSV, clearFlags, depthClear, stencilClear);
}
}
}
if (maskedClearRenderTargets.size() > 0 || maskedClearDepthStencil)
{
// To clear the render targets and depth stencil in one pass:
//
// Render a quad clipped to the scissor rectangle which draws the clear color and a blend
// state that will perform the required color masking.
//
// The quad's depth is equal to the depth clear value with a depth stencil state that
// will enable or disable depth test/writes if the depth buffer should be cleared or not.
//
// The rasterizer state's stencil is set to always pass or fail based on if the stencil
// should be cleared or not with a stencil write mask of the stencil clear value.
//
// ======================================================================================
//
// Luckily, the gl spec (ES 3.0.2 pg 183) states that the results of clearing a render-
// buffer that is not normalized fixed point or floating point with floating point values
// are undefined so we can just write floats to them and D3D11 will bit cast them to
// integers.
//
// Also, we don't have to worry about attempting to clear a normalized fixed/floating point
// buffer with integer values because there is no gl API call which would allow it,
// glClearBuffer* calls only clear a single renderbuffer at a time which is verified to
// be a compatible clear type.
// Bind all the render targets which need clearing
ASSERT(maskedClearRenderTargets.size() <= mRenderer->getMaxRenderTargets());
std::vector<ID3D11RenderTargetView*> rtvs(maskedClearRenderTargets.size());
for (unsigned int i = 0; i < maskedClearRenderTargets.size(); i++)
{
ID3D11RenderTargetView *renderTarget = maskedClearRenderTargets[i]->getRenderTargetView();
if (!renderTarget)
{
ERR("Render target pointer unexpectedly null.");
return;
}
rtvs[i] = renderTarget;
}
ID3D11DepthStencilView *dsv = maskedClearDepthStencil ? maskedClearDepthStencil->getDepthStencilView() : NULL;
ID3D11BlendState *blendState = getBlendState(clearParams, maskedClearRenderTargets);
const FLOAT blendFactors[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
const UINT sampleMask = 0xFFFFFFFF;
ID3D11DepthStencilState *dsState = getDepthStencilState(clearParams);
const UINT stencilClear = clearParams.stencilClearValue & 0xFF;
// Set the vertices
UINT vertexStride = 0;
const UINT startIdx = 0;
const ClearShader* shader = NULL;
D3D11_MAPPED_SUBRESOURCE mappedResource;
HRESULT result = deviceContext->Map(mVertexBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
if (FAILED(result))
{
ERR("Failed to map masked clear vertex buffer, HRESULT: 0x%X.", result);
return;
}
const gl::Rectangle *scissorPtr = clearParams.scissorEnabled ? &clearParams.scissor : NULL;
switch (clearParams.colorClearType)
{
case GL_FLOAT:
ApplyVertices(framebufferSize, scissorPtr, clearParams.colorFClearValue, clearParams.depthClearValue, mappedResource.pData);
vertexStride = sizeof(d3d11::PositionDepthColorVertex<float>);
shader = &mFloatClearShader;
break;
case GL_UNSIGNED_INT:
ApplyVertices(framebufferSize, scissorPtr, clearParams.colorUIClearValue, clearParams.depthClearValue, mappedResource.pData);
vertexStride = sizeof(d3d11::PositionDepthColorVertex<unsigned int>);
shader = &mUintClearShader;
break;
case GL_INT:
ApplyVertices(framebufferSize, scissorPtr, clearParams.colorIClearValue, clearParams.depthClearValue, mappedResource.pData);
vertexStride = sizeof(d3d11::PositionDepthColorVertex<int>);
shader = &mIntClearShader;
break;
default:
UNREACHABLE();
break;
}
deviceContext->Unmap(mVertexBuffer, 0);
// Set the viewport to be the same size as the framebuffer
D3D11_VIEWPORT viewport;
viewport.TopLeftX = 0;
viewport.TopLeftY = 0;
viewport.Width = framebufferSize.width;
viewport.Height = framebufferSize.height;
viewport.MinDepth = 0;
viewport.MaxDepth = 1;
deviceContext->RSSetViewports(1, &viewport);
// Apply state
deviceContext->OMSetBlendState(blendState, blendFactors, sampleMask);
deviceContext->OMSetDepthStencilState(dsState, stencilClear);
deviceContext->RSSetState(mRasterizerState);
// Apply shaders
deviceContext->IASetInputLayout(shader->inputLayout);
deviceContext->VSSetShader(shader->vertexShader, NULL, 0);
deviceContext->PSSetShader(shader->pixelShader, NULL, 0);
deviceContext->GSSetShader(NULL, NULL, 0);
// Apply vertex buffer
deviceContext->IASetVertexBuffers(0, 1, &mVertexBuffer, &vertexStride, &startIdx);
deviceContext->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
// Apply render targets
deviceContext->OMSetRenderTargets(rtvs.size(), (rtvs.empty() ? NULL : &rtvs[0]), dsv);
// Draw the clear quad
deviceContext->Draw(4, 0);
// Clean up
mRenderer->markAllStateDirty();
}
}
gl::Error Clear11::clearFramebuffer(const ClearParameters &clearParams, const gl::Framebuffer::Data &fboData)
{
const auto &colorAttachments = fboData.mColorAttachments;
const auto &drawBufferStates = fboData.mDrawBufferStates;
const auto *depthAttachment = fboData.mDepthAttachment;
const auto *stencilAttachment = fboData.mStencilAttachment;
ASSERT(colorAttachments.size() == drawBufferStates.size());
// Iterate over the color buffers which require clearing and determine if they can be
// cleared with ID3D11DeviceContext::ClearRenderTargetView or ID3D11DeviceContext1::ClearView.
// This requires:
// 1) The render target is being cleared to a float value (will be cast to integer when clearing integer
// render targets as expected but does not work the other way around)
// 2) The format of the render target has no color channels that are currently masked out.
// Clear the easy-to-clear buffers on the spot and accumulate the ones that require special work.
//
// If these conditions are met, and:
// - No scissored clear is needed, then clear using ID3D11DeviceContext::ClearRenderTargetView.
// - A scissored clear is needed then clear using ID3D11DeviceContext1::ClearView if available.
// Otherwise draw a quad.
//
// Also determine if the depth stencil can be cleared with ID3D11DeviceContext::ClearDepthStencilView
// by checking if the stencil write mask covers the entire stencil.
//
// To clear the remaining buffers, quads must be drawn containing an int, uint or float vertex color
// attribute.
gl::Extents framebufferSize;
auto iter = std::find_if(colorAttachments.begin(), colorAttachments.end(), [](const gl::FramebufferAttachment *attachment) { return attachment != nullptr; });
if (iter != colorAttachments.end())
{
framebufferSize.width = (*iter)->getWidth();
framebufferSize.height = (*iter)->getHeight();
framebufferSize.depth = 1;
}
else if (depthAttachment != nullptr)
{
framebufferSize.width = depthAttachment->getWidth();
framebufferSize.height = depthAttachment->getHeight();
framebufferSize.depth = 1;
}
else if (stencilAttachment != nullptr)
{
framebufferSize.width = stencilAttachment->getWidth();
framebufferSize.height = stencilAttachment->getHeight();
framebufferSize.depth = 1;
}
else
{
UNREACHABLE();
return gl::Error(GL_INVALID_OPERATION);
}
if (clearParams.scissorEnabled && (clearParams.scissor.x >= framebufferSize.width ||
clearParams.scissor.y >= framebufferSize.height ||
clearParams.scissor.x + clearParams.scissor.width <= 0 ||
clearParams.scissor.y + clearParams.scissor.height <= 0))
{
// Scissor is enabled and the scissor rectangle is outside the renderbuffer
return gl::Error(GL_NO_ERROR);
}
bool needScissoredClear = clearParams.scissorEnabled && (clearParams.scissor.x > 0 || clearParams.scissor.y > 0 ||
clearParams.scissor.x + clearParams.scissor.width < framebufferSize.width ||
clearParams.scissor.y + clearParams.scissor.height < framebufferSize.height);
std::vector<MaskedRenderTarget> maskedClearRenderTargets;
RenderTarget11* maskedClearDepthStencil = NULL;
ID3D11DeviceContext *deviceContext = mRenderer->getDeviceContext();
ID3D11DeviceContext1 *deviceContext1 = mRenderer->getDeviceContext1IfSupported();
for (size_t colorAttachment = 0; colorAttachment < colorAttachments.size(); colorAttachment++)
{
if (clearParams.clearColor[colorAttachment] &&
colorAttachments[colorAttachment] != nullptr &&
drawBufferStates[colorAttachment] != GL_NONE)
{
const gl::FramebufferAttachment *attachment = colorAttachments[colorAttachment];
RenderTarget11 *renderTarget = NULL;
gl::Error error = d3d11::GetAttachmentRenderTarget(attachment, &renderTarget);
if (error.isError())
{
return error;
}
const gl::InternalFormat &formatInfo = gl::GetInternalFormatInfo(attachment->getInternalFormat());
if (clearParams.colorClearType == GL_FLOAT &&
!(formatInfo.componentType == GL_FLOAT || formatInfo.componentType == GL_UNSIGNED_NORMALIZED || formatInfo.componentType == GL_SIGNED_NORMALIZED))
{
ERR("It is undefined behaviour to clear a render buffer which is not normalized fixed point or floating-"
"point to floating point values (color attachment %u has internal format 0x%X).", colorAttachment,
attachment->getInternalFormat());
}
if ((formatInfo.redBits == 0 || !clearParams.colorMaskRed) &&
(formatInfo.greenBits == 0 || !clearParams.colorMaskGreen) &&
(formatInfo.blueBits == 0 || !clearParams.colorMaskBlue) &&
(formatInfo.alphaBits == 0 || !clearParams.colorMaskAlpha))
{
// Every channel either does not exist in the render target or is masked out
continue;
}
else if ((!mSupportsClearView && needScissoredClear) || clearParams.colorClearType != GL_FLOAT ||
(formatInfo.redBits > 0 && !clearParams.colorMaskRed) ||
(formatInfo.greenBits > 0 && !clearParams.colorMaskGreen) ||
(formatInfo.blueBits > 0 && !clearParams.colorMaskBlue) ||
(formatInfo.alphaBits > 0 && !clearParams.colorMaskAlpha))
{
// A masked clear is required, or a scissored clear is required and ID3D11DeviceContext1::ClearView is unavailable
MaskedRenderTarget maskAndRt;
bool clearColor = clearParams.clearColor[colorAttachment];
maskAndRt.colorMask[0] = (clearColor && clearParams.colorMaskRed);
maskAndRt.colorMask[1] = (clearColor && clearParams.colorMaskGreen);
maskAndRt.colorMask[2] = (clearColor && clearParams.colorMaskBlue);
maskAndRt.colorMask[3] = (clearColor && clearParams.colorMaskAlpha);
maskAndRt.renderTarget = renderTarget;
maskedClearRenderTargets.push_back(maskAndRt);
}
else
{
// ID3D11DeviceContext::ClearRenderTargetView or ID3D11DeviceContext1::ClearView is possible
ID3D11RenderTargetView *framebufferRTV = renderTarget->getRenderTargetView();
if (!framebufferRTV)
{
return gl::Error(GL_OUT_OF_MEMORY, "Internal render target view pointer unexpectedly null.");
}
const d3d11::DXGIFormat &dxgiFormatInfo = d3d11::GetDXGIFormatInfo(renderTarget->getDXGIFormat());
// Check if the actual format has a channel that the internal format does not and set them to the
// default values
const float clearValues[4] =
{
((formatInfo.redBits == 0 && dxgiFormatInfo.redBits > 0) ? 0.0f : clearParams.colorFClearValue.red),
((formatInfo.greenBits == 0 && dxgiFormatInfo.greenBits > 0) ? 0.0f : clearParams.colorFClearValue.green),
((formatInfo.blueBits == 0 && dxgiFormatInfo.blueBits > 0) ? 0.0f : clearParams.colorFClearValue.blue),
((formatInfo.alphaBits == 0 && dxgiFormatInfo.alphaBits > 0) ? 1.0f : clearParams.colorFClearValue.alpha),
};
if (needScissoredClear)
{
// We shouldn't reach here if deviceContext1 is unavailable.
ASSERT(deviceContext1);
D3D11_RECT rect;
rect.left = clearParams.scissor.x;
rect.right = clearParams.scissor.x + clearParams.scissor.width;
rect.top = clearParams.scissor.y;
rect.bottom = clearParams.scissor.y + clearParams.scissor.height;
deviceContext1->ClearView(framebufferRTV, clearValues, &rect, 1);
}
else
{
deviceContext->ClearRenderTargetView(framebufferRTV, clearValues);
}
}
}
}
if (clearParams.clearDepth || clearParams.clearStencil)
{
const gl::FramebufferAttachment *attachment = (depthAttachment != nullptr) ? depthAttachment : stencilAttachment;
ASSERT(attachment != nullptr);
RenderTarget11 *renderTarget = NULL;
gl::Error error = d3d11::GetAttachmentRenderTarget(attachment, &renderTarget);
if (error.isError())
{
return error;
}
const d3d11::DXGIFormat &dxgiFormatInfo = d3d11::GetDXGIFormatInfo(renderTarget->getDXGIFormat());
unsigned int stencilUnmasked = (stencilAttachment != nullptr) ? (1 << dxgiFormatInfo.stencilBits) - 1 : 0;
bool needMaskedStencilClear = clearParams.clearStencil && (clearParams.stencilWriteMask & stencilUnmasked) != stencilUnmasked;
if (needScissoredClear || needMaskedStencilClear)
{
maskedClearDepthStencil = renderTarget;
}
else
{
ID3D11DepthStencilView *framebufferDSV = renderTarget->getDepthStencilView();
if (!framebufferDSV)
{
return gl::Error(GL_OUT_OF_MEMORY, "Internal depth stencil view pointer unexpectedly null.");
}
UINT clearFlags = (clearParams.clearDepth ? D3D11_CLEAR_DEPTH : 0) |
(clearParams.clearStencil ? D3D11_CLEAR_STENCIL : 0);
FLOAT depthClear = gl::clamp01(clearParams.depthClearValue);
UINT8 stencilClear = clearParams.stencilClearValue & 0xFF;
deviceContext->ClearDepthStencilView(framebufferDSV, clearFlags, depthClear, stencilClear);
}
}
if (maskedClearRenderTargets.size() > 0 || maskedClearDepthStencil)
{
// To clear the render targets and depth stencil in one pass:
//
// Render a quad clipped to the scissor rectangle which draws the clear color and a blend
// state that will perform the required color masking.
//
// The quad's depth is equal to the depth clear value with a depth stencil state that
// will enable or disable depth test/writes if the depth buffer should be cleared or not.
//
// The rasterizer state's stencil is set to always pass or fail based on if the stencil
// should be cleared or not with a stencil write mask of the stencil clear value.
//
// ======================================================================================
//
// Luckily, the gl spec (ES 3.0.2 pg 183) states that the results of clearing a render-
// buffer that is not normalized fixed point or floating point with floating point values
// are undefined so we can just write floats to them and D3D11 will bit cast them to
// integers.
//
// Also, we don't have to worry about attempting to clear a normalized fixed/floating point
// buffer with integer values because there is no gl API call which would allow it,
// glClearBuffer* calls only clear a single renderbuffer at a time which is verified to
// be a compatible clear type.
// Bind all the render targets which need clearing
ASSERT(maskedClearRenderTargets.size() <= mRenderer->getRendererCaps().maxDrawBuffers);
std::vector<ID3D11RenderTargetView*> rtvs(maskedClearRenderTargets.size());
for (unsigned int i = 0; i < maskedClearRenderTargets.size(); i++)
{
RenderTarget11 *renderTarget = maskedClearRenderTargets[i].renderTarget;
ID3D11RenderTargetView *rtv = renderTarget->getRenderTargetView();
if (!rtv)
{
return gl::Error(GL_OUT_OF_MEMORY, "Internal render target view pointer unexpectedly null.");
}
rtvs[i] = rtv;
}
ID3D11DepthStencilView *dsv = maskedClearDepthStencil ? maskedClearDepthStencil->getDepthStencilView() : NULL;
ID3D11BlendState *blendState = getBlendState(maskedClearRenderTargets);
const FLOAT blendFactors[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
const UINT sampleMask = 0xFFFFFFFF;
ID3D11DepthStencilState *dsState = getDepthStencilState(clearParams);
const UINT stencilClear = clearParams.stencilClearValue & 0xFF;
// Set the vertices
UINT vertexStride = 0;
const UINT startIdx = 0;
const ClearShader* shader = NULL;
D3D11_MAPPED_SUBRESOURCE mappedResource;
HRESULT result = deviceContext->Map(mVertexBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
if (FAILED(result))
{
return gl::Error(GL_OUT_OF_MEMORY, "Failed to map internal masked clear vertex buffer, HRESULT: 0x%X.", result);
}
const gl::Rectangle *scissorPtr = clearParams.scissorEnabled ? &clearParams.scissor : NULL;
switch (clearParams.colorClearType)
{
case GL_FLOAT:
ApplyVertices(framebufferSize, scissorPtr, clearParams.colorFClearValue, clearParams.depthClearValue, mappedResource.pData);
vertexStride = sizeof(d3d11::PositionDepthColorVertex<float>);
shader = &mFloatClearShader;
break;
case GL_UNSIGNED_INT:
ApplyVertices(framebufferSize, scissorPtr, clearParams.colorUIClearValue, clearParams.depthClearValue, mappedResource.pData);
vertexStride = sizeof(d3d11::PositionDepthColorVertex<unsigned int>);
shader = &mUintClearShader;
break;
case GL_INT:
ApplyVertices(framebufferSize, scissorPtr, clearParams.colorIClearValue, clearParams.depthClearValue, mappedResource.pData);
vertexStride = sizeof(d3d11::PositionDepthColorVertex<int>);
shader = &mIntClearShader;
break;
default:
UNREACHABLE();
break;
}
deviceContext->Unmap(mVertexBuffer, 0);
// Set the viewport to be the same size as the framebuffer
D3D11_VIEWPORT viewport;
viewport.TopLeftX = 0;
viewport.TopLeftY = 0;
viewport.Width = framebufferSize.width;
viewport.Height = framebufferSize.height;
viewport.MinDepth = 0;
viewport.MaxDepth = 1;
deviceContext->RSSetViewports(1, &viewport);
// Apply state
deviceContext->OMSetBlendState(blendState, blendFactors, sampleMask);
deviceContext->OMSetDepthStencilState(dsState, stencilClear);
deviceContext->RSSetState(mRasterizerState);
// Apply shaders
deviceContext->IASetInputLayout(shader->inputLayout);
deviceContext->VSSetShader(shader->vertexShader, NULL, 0);
deviceContext->PSSetShader(shader->pixelShader, NULL, 0);
deviceContext->GSSetShader(NULL, NULL, 0);
// Apply vertex buffer
deviceContext->IASetVertexBuffers(0, 1, &mVertexBuffer, &vertexStride, &startIdx);
deviceContext->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
// Apply render targets
deviceContext->OMSetRenderTargets(rtvs.size(), (rtvs.empty() ? NULL : &rtvs[0]), dsv);
// Draw the clear quad
deviceContext->Draw(4, 0);
// Clean up
mRenderer->markAllStateDirty();
}
return gl::Error(GL_NO_ERROR);
}
