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);
});
}
void DeferredLightingEffect::render(const render::RenderContextPointer& renderContext) {
auto args = renderContext->args;
gpu::doInBatch(args->_context, [&](gpu::Batch& batch) {
// Allocate the parameters buffer used by all the deferred shaders
if (!_deferredTransformBuffer[0]._buffer) {
DeferredTransform parameters;
_deferredTransformBuffer[0] = gpu::BufferView(std::make_shared<gpu::Buffer>(sizeof(DeferredTransform), (const gpu::Byte*) ¶meters));
_deferredTransformBuffer[1] = gpu::BufferView(std::make_shared<gpu::Buffer>(sizeof(DeferredTransform), (const gpu::Byte*) ¶meters));
}
// Framebuffer copy operations cannot function as multipass stereo operations.
batch.enableStereo(false);
// perform deferred lighting, rendering to free fbo
auto framebufferCache = DependencyManager::get<FramebufferCache>();
auto textureCache = DependencyManager::get<TextureCache>();
QSize framebufferSize = framebufferCache->getFrameBufferSize();
// binding the first framebuffer
auto lightingFBO = framebufferCache->getLightingFramebuffer();
batch.setFramebuffer(lightingFBO);
batch.setViewportTransform(args->_viewport);
batch.setStateScissorRect(args->_viewport);
// Bind the G-Buffer surfaces
batch.setResourceTexture(DEFERRED_BUFFER_COLOR_UNIT, framebufferCache->getDeferredColorTexture());
batch.setResourceTexture(DEFERRED_BUFFER_NORMAL_UNIT, framebufferCache->getDeferredNormalTexture());
batch.setResourceTexture(DEFERRED_BUFFER_EMISSIVE_UNIT, framebufferCache->getDeferredSpecularTexture());
batch.setResourceTexture(DEFERRED_BUFFER_DEPTH_UNIT, framebufferCache->getPrimaryDepthTexture());
// FIXME: Different render modes should have different tasks
if (args->_renderMode == RenderArgs::DEFAULT_RENDER_MODE && _ambientOcclusionEnabled) {
batch.setResourceTexture(DEFERRED_BUFFER_OBSCURANCE_UNIT, framebufferCache->getOcclusionTexture());
} else {
// need to assign the white texture if ao is off
batch.setResourceTexture(DEFERRED_BUFFER_OBSCURANCE_UNIT, textureCache->getWhiteTexture());
}
assert(_lightStage.lights.size() > 0);
const auto& globalShadow = _lightStage.lights[0]->shadow;
// Bind the shadow buffer
batch.setResourceTexture(SHADOW_MAP_UNIT, globalShadow.map);
// THe main viewport is assumed to be the mono viewport (or the 2 stereo faces side by side within that viewport)
auto monoViewport = args->_viewport;
float sMin = args->_viewport.x / (float)framebufferSize.width();
float sWidth = args->_viewport.z / (float)framebufferSize.width();
float tMin = args->_viewport.y / (float)framebufferSize.height();
float tHeight = args->_viewport.w / (float)framebufferSize.height();
// The view frustum is the mono frustum base
auto viewFrustum = args->_viewFrustum;
// Eval the mono projection
mat4 monoProjMat;
viewFrustum->evalProjectionMatrix(monoProjMat);
// The mono view transform
Transform monoViewTransform;
viewFrustum->evalViewTransform(monoViewTransform);
// THe mono view matrix coming from the mono view transform
glm::mat4 monoViewMat;
monoViewTransform.getMatrix(monoViewMat);
// Running in stero ?
bool isStereo = args->_context->isStereo();
int numPasses = 1;
mat4 projMats[2];
Transform viewTransforms[2];
ivec4 viewports[2];
vec4 clipQuad[2];
vec2 screenBottomLeftCorners[2];
vec2 screenTopRightCorners[2];
vec4 fetchTexcoordRects[2];
DeferredTransform deferredTransforms[2];
auto geometryCache = DependencyManager::get<GeometryCache>();
if (isStereo) {
numPasses = 2;
mat4 eyeViews[2];
args->_context->getStereoProjections(projMats);
args->_context->getStereoViews(eyeViews);
float halfWidth = 0.5f * sWidth;
for (int i = 0; i < numPasses; i++) {
// In stereo, the 2 sides are layout side by side in the mono viewport and their width is half
int sideWidth = monoViewport.z >> 1;
viewports[i] = ivec4(monoViewport.x + (i * sideWidth), monoViewport.y, sideWidth, monoViewport.w);
deferredTransforms[i].projection = projMats[i];
auto sideViewMat = monoViewMat * glm::inverse(eyeViews[i]);
viewTransforms[i].evalFromRawMatrix(sideViewMat);
deferredTransforms[i].viewInverse = sideViewMat;
deferredTransforms[i].stereoSide = (i == 0 ? -1.0f : 1.0f);
clipQuad[i] = glm::vec4(sMin + i * halfWidth, tMin, halfWidth, tHeight);
screenBottomLeftCorners[i] = glm::vec2(-1.0f + i * 1.0f, -1.0f);
screenTopRightCorners[i] = glm::vec2(i * 1.0f, 1.0f);
fetchTexcoordRects[i] = glm::vec4(sMin + i * halfWidth, tMin, halfWidth, tHeight);
}
} else {
viewports[0] = monoViewport;
projMats[0] = monoProjMat;
deferredTransforms[0].projection = monoProjMat;
deferredTransforms[0].viewInverse = monoViewMat;
viewTransforms[0] = monoViewTransform;
deferredTransforms[0].stereoSide = 0.0f;
clipQuad[0] = glm::vec4(sMin, tMin, sWidth, tHeight);
screenBottomLeftCorners[0] = glm::vec2(-1.0f, -1.0f);
screenTopRightCorners[0] = glm::vec2(1.0f, 1.0f);
fetchTexcoordRects[0] = glm::vec4(sMin, tMin, sWidth, tHeight);
}
auto eyePoint = viewFrustum->getPosition();
float nearRadius = glm::distance(eyePoint, viewFrustum->getNearTopLeft());
for (int side = 0; side < numPasses; side++) {
// Render in this side's viewport
batch.setViewportTransform(viewports[side]);
batch.setStateScissorRect(viewports[side]);
// Sync and Bind the correct DeferredTransform ubo
_deferredTransformBuffer[side]._buffer->setSubData(0, sizeof(DeferredTransform), (const gpu::Byte*) &deferredTransforms[side]);
batch.setUniformBuffer(_directionalLightLocations->deferredTransformBuffer, _deferredTransformBuffer[side]);
glm::vec2 topLeft(-1.0f, -1.0f);
glm::vec2 bottomRight(1.0f, 1.0f);
glm::vec2 texCoordTopLeft(clipQuad[side].x, clipQuad[side].y);
glm::vec2 texCoordBottomRight(clipQuad[side].x + clipQuad[side].z, clipQuad[side].y + clipQuad[side].w);
// First Global directional light and ambient pass
{
auto& program = _shadowMapEnabled ? _directionalLightShadow : _directionalLight;
LightLocationsPtr locations = _shadowMapEnabled ? _directionalLightShadowLocations : _directionalLightLocations;
const auto& keyLight = _allocatedLights[_globalLights.front()];
// Setup the global directional pass pipeline
{
if (_shadowMapEnabled) {
if (keyLight->getAmbientMap()) {
program = _directionalSkyboxLightShadow;
locations = _directionalSkyboxLightShadowLocations;
} else {
program = _directionalAmbientSphereLightShadow;
locations = _directionalAmbientSphereLightShadowLocations;
}
} else {
if (keyLight->getAmbientMap()) {
program = _directionalSkyboxLight;
locations = _directionalSkyboxLightLocations;
} else {
program = _directionalAmbientSphereLight;
locations = _directionalAmbientSphereLightLocations;
}
}
if (locations->shadowTransformBuffer >= 0) {
batch.setUniformBuffer(locations->shadowTransformBuffer, globalShadow.getBuffer());
}
batch.setPipeline(program);
}
{ // Setup the global lighting
setupKeyLightBatch(batch, locations->lightBufferUnit, SKYBOX_MAP_UNIT);
}
{
batch.setModelTransform(Transform());
batch.setProjectionTransform(glm::mat4());
batch.setViewTransform(Transform());
glm::vec4 color(1.0f, 1.0f, 1.0f, 1.0f);
geometryCache->renderQuad(batch, topLeft, bottomRight, texCoordTopLeft, texCoordBottomRight, color);
}
if (keyLight->getAmbientMap()) {
batch.setResourceTexture(SKYBOX_MAP_UNIT, nullptr);
}
}
auto texcoordMat = glm::mat4();
/* texcoordMat[0] = glm::vec4(sWidth / 2.0f, 0.0f, 0.0f, sMin + sWidth / 2.0f);
texcoordMat[1] = glm::vec4(0.0f, tHeight / 2.0f, 0.0f, tMin + tHeight / 2.0f);
*/ texcoordMat[0] = glm::vec4(fetchTexcoordRects[side].z / 2.0f, 0.0f, 0.0f, fetchTexcoordRects[side].x + fetchTexcoordRects[side].z / 2.0f);
texcoordMat[1] = glm::vec4(0.0f, fetchTexcoordRects[side].w / 2.0f, 0.0f, fetchTexcoordRects[side].y + fetchTexcoordRects[side].w / 2.0f);
texcoordMat[2] = glm::vec4(0.0f, 0.0f, 1.0f, 0.0f);
texcoordMat[3] = glm::vec4(0.0f, 0.0f, 0.0f, 1.0f);
// enlarge the scales slightly to account for tesselation
const float SCALE_EXPANSION = 0.05f;
batch.setProjectionTransform(projMats[side]);
batch.setViewTransform(viewTransforms[side]);
// Splat Point lights
if (!_pointLights.empty()) {
batch.setPipeline(_pointLight);
batch._glUniformMatrix4fv(_pointLightLocations->texcoordMat, 1, false, reinterpret_cast< const float* >(&texcoordMat));
for (auto lightID : _pointLights) {
auto& light = _allocatedLights[lightID];
// IN DEBUG: light->setShowContour(true);
batch.setUniformBuffer(_pointLightLocations->lightBufferUnit, light->getSchemaBuffer());
float expandedRadius = light->getMaximumRadius() * (1.0f + SCALE_EXPANSION);
// TODO: We shouldn;t have to do that test and use a different volume geometry for when inside the vlight volume,
// we should be able to draw thre same geometry use DepthClamp but for unknown reason it's s not working...
if (glm::distance(eyePoint, glm::vec3(light->getPosition())) < expandedRadius + nearRadius) {
Transform model;
model.setTranslation(glm::vec3(0.0f, 0.0f, -1.0f));
batch.setModelTransform(model);
batch.setViewTransform(Transform());
batch.setProjectionTransform(glm::mat4());
glm::vec4 color(1.0f, 1.0f, 1.0f, 1.0f);
DependencyManager::get<GeometryCache>()->renderQuad(batch, topLeft, bottomRight, texCoordTopLeft, texCoordBottomRight, color);
batch.setProjectionTransform(projMats[side]);
batch.setViewTransform(viewTransforms[side]);
} else {
Transform model;
model.setTranslation(glm::vec3(light->getPosition().x, light->getPosition().y, light->getPosition().z));
batch.setModelTransform(model.postScale(expandedRadius));
batch._glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
geometryCache->renderSphere(batch);
}
}
}
// Splat spot lights
if (!_spotLights.empty()) {
batch.setPipeline(_spotLight);
batch._glUniformMatrix4fv(_spotLightLocations->texcoordMat, 1, false, reinterpret_cast< const float* >(&texcoordMat));
for (auto lightID : _spotLights) {
auto light = _allocatedLights[lightID];
// IN DEBUG: light->setShowContour(true);
batch.setUniformBuffer(_spotLightLocations->lightBufferUnit, light->getSchemaBuffer());
auto eyeLightPos = eyePoint - light->getPosition();
auto eyeHalfPlaneDistance = glm::dot(eyeLightPos, light->getDirection());
const float TANGENT_LENGTH_SCALE = 0.666f;
glm::vec4 coneParam(light->getSpotAngleCosSin(), TANGENT_LENGTH_SCALE * tanf(0.5f * light->getSpotAngle()), 1.0f);
float expandedRadius = light->getMaximumRadius() * (1.0f + SCALE_EXPANSION);
// TODO: We shouldn;t have to do that test and use a different volume geometry for when inside the vlight volume,
// we should be able to draw thre same geometry use DepthClamp but for unknown reason it's s not working...
if ((eyeHalfPlaneDistance > -nearRadius) &&
(glm::distance(eyePoint, glm::vec3(light->getPosition())) < expandedRadius + nearRadius)) {
coneParam.w = 0.0f;
batch._glUniform4fv(_spotLightLocations->coneParam, 1, reinterpret_cast< const float* >(&coneParam));
Transform model;
model.setTranslation(glm::vec3(0.0f, 0.0f, -1.0f));
batch.setModelTransform(model);
batch.setViewTransform(Transform());
batch.setProjectionTransform(glm::mat4());
glm::vec4 color(1.0f, 1.0f, 1.0f, 1.0f);
DependencyManager::get<GeometryCache>()->renderQuad(batch, topLeft, bottomRight, texCoordTopLeft, texCoordBottomRight, color);
batch.setProjectionTransform( projMats[side]);
batch.setViewTransform(viewTransforms[side]);
} else {
coneParam.w = 1.0f;
batch._glUniform4fv(_spotLightLocations->coneParam, 1, reinterpret_cast< const float* >(&coneParam));
Transform model;
model.setTranslation(light->getPosition());
model.postRotate(light->getOrientation());
model.postScale(glm::vec3(expandedRadius, expandedRadius, expandedRadius));
batch.setModelTransform(model);
auto mesh = getSpotLightMesh();
batch.setIndexBuffer(mesh->getIndexBuffer());
batch.setInputBuffer(0, mesh->getVertexBuffer());
batch.setInputFormat(mesh->getVertexFormat());
auto& part = mesh->getPartBuffer().get<model::Mesh::Part>();
batch.drawIndexed(model::Mesh::topologyToPrimitive(part._topology), part._numIndices, part._startIndex);
}
}
}
}
// Probably not necessary in the long run because the gpu layer would unbound this texture if used as render target
batch.setResourceTexture(DEFERRED_BUFFER_COLOR_UNIT, nullptr);
batch.setResourceTexture(DEFERRED_BUFFER_NORMAL_UNIT, nullptr);
batch.setResourceTexture(DEFERRED_BUFFER_EMISSIVE_UNIT, nullptr);
batch.setResourceTexture(DEFERRED_BUFFER_DEPTH_UNIT, nullptr);
batch.setResourceTexture(DEFERRED_BUFFER_OBSCURANCE_UNIT, nullptr);
batch.setResourceTexture(SHADOW_MAP_UNIT, nullptr);
batch.setResourceTexture(SKYBOX_MAP_UNIT, nullptr);
batch.setUniformBuffer(_directionalLightLocations->deferredTransformBuffer, nullptr);
});
GLuint TextureCache::getPrimaryDepthTextureID() {
return gpu::GLBackend::getTextureID(getPrimaryDepthTexture());
}