void AmbientOcclusion::run(const render::SceneContextPointer& sceneContext, const render::RenderContextPointer& renderContext) {
assert(renderContext->getArgs());
assert(renderContext->getArgs()->_viewFrustum);
RenderArgs* args = renderContext->getArgs();
gpu::doInBatch(args->_context, [=](gpu::Batch& batch) {
auto framebufferCache = DependencyManager::get<FramebufferCache>();
QSize framebufferSize = framebufferCache->getFrameBufferSize();
float fbWidth = framebufferSize.width();
float fbHeight = framebufferSize.height();
float sMin = args->_viewport.x / fbWidth;
float sWidth = args->_viewport.z / fbWidth;
float tMin = args->_viewport.y / fbHeight;
float tHeight = args->_viewport.w / fbHeight;
glm::mat4 projMat;
Transform viewMat;
args->_viewFrustum->evalProjectionMatrix(projMat);
args->_viewFrustum->evalViewTransform(viewMat);
batch.setProjectionTransform(projMat);
batch.setViewTransform(viewMat);
batch.setModelTransform(Transform());
// Occlusion step
getOcclusionPipeline();
batch.setResourceTexture(0, framebufferCache->getPrimaryDepthTexture());
batch.setResourceTexture(1, framebufferCache->getDeferredNormalTexture());
_occlusionBuffer->setRenderBuffer(0, _occlusionTexture);
batch.setFramebuffer(_occlusionBuffer);
// Occlusion uniforms
g_scale = 1.0f;
g_bias = 1.0f;
g_sample_rad = 1.0f;
g_intensity = 1.0f;
// Bind the first gpu::Pipeline we need - for calculating occlusion buffer
batch.setPipeline(getOcclusionPipeline());
batch._glUniform1f(_gScaleLoc, g_scale);
batch._glUniform1f(_gBiasLoc, g_bias);
batch._glUniform1f(_gSampleRadiusLoc, g_sample_rad);
batch._glUniform1f(_gIntensityLoc, g_intensity);
// setup uniforms for unpacking a view-space position from the depth buffer
// This is code taken from DeferredLightEffect.render() method in DeferredLightingEffect.cpp.
// DeferredBuffer.slh shows how the unpacking is done and what variables are needed.
// initialize the view-space unpacking uniforms using frustum data
float left, right, bottom, top, nearVal, farVal;
glm::vec4 nearClipPlane, farClipPlane;
args->_viewFrustum->computeOffAxisFrustum(left, right, bottom, top, nearVal, farVal, nearClipPlane, farClipPlane);
float depthScale = (farVal - nearVal) / farVal;
float nearScale = -1.0f / nearVal;
float depthTexCoordScaleS = (right - left) * nearScale / sWidth;
float depthTexCoordScaleT = (top - bottom) * nearScale / tHeight;
float depthTexCoordOffsetS = left * nearScale - sMin * depthTexCoordScaleS;
float depthTexCoordOffsetT = bottom * nearScale - tMin * depthTexCoordScaleT;
// now set the position-unpacking unforms
batch._glUniform1f(_nearLoc, nearVal);
batch._glUniform1f(_depthScaleLoc, depthScale);
batch._glUniform2f(_depthTexCoordOffsetLoc, depthTexCoordOffsetS, depthTexCoordOffsetT);
batch._glUniform2f(_depthTexCoordScaleLoc, depthTexCoordScaleS, depthTexCoordScaleT);
batch._glUniform2f(_renderTargetResLoc, fbWidth, fbHeight);
batch._glUniform2f(_renderTargetResInvLoc, 1.0f / fbWidth, 1.0f / fbHeight);
glm::vec4 color(0.0f, 0.0f, 0.0f, 1.0f);
glm::vec2 bottomLeft(-1.0f, -1.0f);
glm::vec2 topRight(1.0f, 1.0f);
glm::vec2 texCoordTopLeft(0.0f, 0.0f);
glm::vec2 texCoordBottomRight(1.0f, 1.0f);
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
// Vertical blur step
getVBlurPipeline();
batch.setResourceTexture(0, _occlusionTexture);
_vBlurBuffer->setRenderBuffer(0, _vBlurTexture);
batch.setFramebuffer(_vBlurBuffer);
// Bind the second gpu::Pipeline we need - for calculating blur buffer
batch.setPipeline(getVBlurPipeline());
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
// Horizontal blur step
getHBlurPipeline();
batch.setResourceTexture(0, _vBlurTexture);
_hBlurBuffer->setRenderBuffer(0, _hBlurTexture);
batch.setFramebuffer(_hBlurBuffer);
// Bind the third gpu::Pipeline we need - for calculating blur buffer
batch.setPipeline(getHBlurPipeline());
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
// Blend step
getBlendPipeline();
batch.setResourceTexture(0, _hBlurTexture);
batch.setFramebuffer(framebufferCache->getDeferredFramebuffer());
// Bind the fourth gpu::Pipeline we need - for blending the primary color buffer with blurred occlusion texture
batch.setPipeline(getBlendPipeline());
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
});
}
auto occlusionFBO = _framebuffer->getOcclusionFramebuffer();
auto occlusionBlurredFBO = _framebuffer->getOcclusionBlurredFramebuffer();
outputs.edit0() = _framebuffer;
outputs.edit1() = _parametersBuffer;
auto framebufferSize = _framebuffer->getSourceFrameSize();
float sMin = occlusionViewport.x / (float)framebufferSize.x;
float sWidth = occlusionViewport.z / (float)framebufferSize.x;
float tMin = occlusionViewport.y / (float)framebufferSize.y;
float tHeight = occlusionViewport.w / (float)framebufferSize.y;
auto occlusionPipeline = getOcclusionPipeline();
auto firstHBlurPipeline = getHBlurPipeline();
auto lastVBlurPipeline = getVBlurPipeline();
gpu::doInBatch(args->_context, [=](gpu::Batch& batch) {
batch.enableStereo(false);
_gpuTimer.begin(batch);
batch.setViewportTransform(occlusionViewport);
batch.setProjectionTransform(glm::mat4());
batch.resetViewTransform();
Transform model;
model.setTranslation(glm::vec3(sMin, tMin, 0.0f));
model.setScale(glm::vec3(sWidth, tHeight, 1.0f));
batch.setModelTransform(model);
void AmbientOcclusion::run(const render::SceneContextPointer& sceneContext, const render::RenderContextPointer& renderContext) {
assert(renderContext->args);
assert(renderContext->args->_viewFrustum);
RenderArgs* args = renderContext->args;
gpu::Batch batch;
glm::mat4 projMat;
Transform viewMat;
args->_viewFrustum->evalProjectionMatrix(projMat);
args->_viewFrustum->evalViewTransform(viewMat);
batch.setProjectionTransform(projMat);
batch.setViewTransform(viewMat);
batch.setModelTransform(Transform());
// Occlusion step
getOcclusionPipeline();
batch.setResourceTexture(0, DependencyManager::get<FramebufferCache>()->getPrimaryDepthTexture());
batch.setResourceTexture(1, DependencyManager::get<FramebufferCache>()->getPrimaryNormalTexture());
_occlusionBuffer->setRenderBuffer(0, _occlusionTexture);
batch.setFramebuffer(_occlusionBuffer);
// Occlusion uniforms
g_scale = 1.0f;
g_bias = 1.0f;
g_sample_rad = 1.0f;
g_intensity = 1.0f;
// Bind the first gpu::Pipeline we need - for calculating occlusion buffer
batch.setPipeline(getOcclusionPipeline());
batch._glUniform1f(_gScaleLoc, g_scale);
batch._glUniform1f(_gBiasLoc, g_bias);
batch._glUniform1f(_gSampleRadiusLoc, g_sample_rad);
batch._glUniform1f(_gIntensityLoc, g_intensity);
batch._glUniform1f(_bufferWidthLoc, DependencyManager::get<FramebufferCache>()->getFrameBufferSize().width());
batch._glUniform1f(_bufferHeightLoc, DependencyManager::get<FramebufferCache>()->getFrameBufferSize().height());
glm::vec4 color(0.0f, 0.0f, 0.0f, 1.0f);
glm::vec2 bottomLeft(-1.0f, -1.0f);
glm::vec2 topRight(1.0f, 1.0f);
glm::vec2 texCoordTopLeft(0.0f, 0.0f);
glm::vec2 texCoordBottomRight(1.0f, 1.0f);
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
// Vertical blur step
getVBlurPipeline();
batch.setResourceTexture(0, _occlusionTexture);
_vBlurBuffer->setRenderBuffer(0, _vBlurTexture);
batch.setFramebuffer(_vBlurBuffer);
// Bind the second gpu::Pipeline we need - for calculating blur buffer
batch.setPipeline(getVBlurPipeline());
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
// Horizontal blur step
getHBlurPipeline();
batch.setResourceTexture(0, _vBlurTexture);
_hBlurBuffer->setRenderBuffer(0, _hBlurTexture);
batch.setFramebuffer(_hBlurBuffer);
// Bind the third gpu::Pipeline we need - for calculating blur buffer
batch.setPipeline(getHBlurPipeline());
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
// Blend step
getBlendPipeline();
batch.setResourceTexture(0, _hBlurTexture);
batch.setFramebuffer(DependencyManager::get<FramebufferCache>()->getPrimaryFramebuffer());
// Bind the fourth gpu::Pipeline we need - for blending the primary color buffer with blurred occlusion texture
batch.setPipeline(getBlendPipeline());
DependencyManager::get<GeometryCache>()->renderQuad(batch, bottomLeft, topRight, texCoordTopLeft, texCoordBottomRight, color);
// Ready to render
args->_context->render((batch));
}
