void DeferredLightingEffect::copyBack(RenderArgs* args) {
auto textureCache = DependencyManager::get<TextureCache>();
QSize framebufferSize = textureCache->getFrameBufferSize();
auto freeFBO = DependencyManager::get<GlowEffect>()->getFreeFramebuffer();
//freeFBO->release();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDisable(GL_CULL_FACE);
// now transfer the lit region to the primary fbo
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_CONSTANT_ALPHA, GL_ONE);
glColorMask(true, true, true, false);
auto primaryFBO = gpu::GLBackend::getFramebufferID(textureCache->getPrimaryFramebuffer());
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, primaryFBO);
//primaryFBO->bind();
glBindTexture(GL_TEXTURE_2D, gpu::GLBackend::getTextureID(freeFBO->getRenderBuffer(0)));
glEnable(GL_TEXTURE_2D);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
int viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
const int VIEWPORT_X_INDEX = 0;
const int VIEWPORT_Y_INDEX = 1;
const int VIEWPORT_WIDTH_INDEX = 2;
const int VIEWPORT_HEIGHT_INDEX = 3;
float sMin = viewport[VIEWPORT_X_INDEX] / (float)framebufferSize.width();
float sWidth = viewport[VIEWPORT_WIDTH_INDEX] / (float)framebufferSize.width();
float tMin = viewport[VIEWPORT_Y_INDEX] / (float)framebufferSize.height();
float tHeight = viewport[VIEWPORT_HEIGHT_INDEX] / (float)framebufferSize.height();
renderFullscreenQuad(sMin, sMin + sWidth, tMin, tMin + tHeight);
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
glColorMask(true, true, true, true);
glEnable(GL_LIGHTING);
glEnable(GL_COLOR_MATERIAL);
glEnable(GL_DEPTH_TEST);
glDepthMask(true);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void AmbientOcclusionEffect::render() {
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glBindTexture(GL_TEXTURE_2D, Application::getInstance()->getTextureCache()->getPrimaryDepthTextureID());
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, _rotationTextureID);
// render with the occlusion shader to the secondary/tertiary buffer
QOpenGLFramebufferObject* freeFBO = Application::getInstance()->getGlowEffect()->getFreeFramebufferObject();
freeFBO->bind();
float left, right, bottom, top, nearVal, farVal;
glm::vec4 nearClipPlane, farClipPlane;
Application::getInstance()->getViewFrustum()->computeOffAxisFrustum(
left, right, bottom, top, nearVal, farVal, nearClipPlane, farClipPlane);
_occlusionProgram->bind();
_occlusionProgram->setUniformValue(_nearLocation, nearVal);
_occlusionProgram->setUniformValue(_farLocation, farVal);
_occlusionProgram->setUniformValue(_leftBottomLocation, left, bottom);
_occlusionProgram->setUniformValue(_rightTopLocation, right, top);
QSize widgetSize = Application::getInstance()->getGLWidget()->size();
_occlusionProgram->setUniformValue(_noiseScaleLocation, widgetSize.width() / (float)ROTATION_WIDTH,
widgetSize.height() / (float)ROTATION_HEIGHT);
int viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
const int VIEWPORT_X_INDEX = 0;
const int VIEWPORT_WIDTH_INDEX = 2;
float sMin = viewport[VIEWPORT_X_INDEX] / (float)widgetSize.width();
float sMax = (viewport[VIEWPORT_X_INDEX] + viewport[VIEWPORT_WIDTH_INDEX]) / (float)widgetSize.width();
renderFullscreenQuad(sMin, sMax);
_occlusionProgram->release();
freeFBO->release();
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
// now render secondary to primary with 4x4 blur
Application::getInstance()->getTextureCache()->getPrimaryFramebufferObject()->bind();
glEnable(GL_BLEND);
glBlendFuncSeparate(GL_ZERO, GL_SRC_COLOR, GL_ZERO, GL_ONE);
glBindTexture(GL_TEXTURE_2D, freeFBO->texture());
_blurProgram->bind();
_blurProgram->setUniformValue(_blurScaleLocation, 1.0f / widgetSize.width(), 1.0f / widgetSize.height());
renderFullscreenQuad(sMin, sMax);
_blurProgram->release();
glBindTexture(GL_TEXTURE_2D, 0);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_CONSTANT_ALPHA, GL_ONE);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
}
QOpenGLFramebufferObject* GlowEffect::render(bool toTexture) {
QOpenGLFramebufferObject* primaryFBO = Application::getInstance()->getTextureCache()->getPrimaryFramebufferObject();
primaryFBO->release();
glBindTexture(GL_TEXTURE_2D, primaryFBO->texture());
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
QOpenGLFramebufferObject* destFBO = toTexture ?
Application::getInstance()->getTextureCache()->getSecondaryFramebufferObject() : NULL;
if (_isEmpty && _renderMode != DIFFUSE_ADD_MODE) {
// copy the primary to the screen
if (QOpenGLFramebufferObject::hasOpenGLFramebufferBlit()) {
QOpenGLFramebufferObject::blitFramebuffer(destFBO, primaryFBO);
} else {
maybeBind(destFBO);
glEnable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glColor3f(1.0f, 1.0f, 1.0f);
renderFullscreenQuad();
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
maybeRelease(destFBO);
}
} else if (_renderMode == ADD_MODE) {
maybeBind(destFBO);
_addProgram->bind();
renderFullscreenQuad();
_addProgram->release();
maybeRelease(destFBO);
} else if (_renderMode == DIFFUSE_ADD_MODE) {
// diffuse into the secondary/tertiary (alternating between frames)
QOpenGLFramebufferObject* oldDiffusedFBO =
Application::getInstance()->getTextureCache()->getSecondaryFramebufferObject();
QOpenGLFramebufferObject* newDiffusedFBO =
Application::getInstance()->getTextureCache()->getTertiaryFramebufferObject();
if (_isOddFrame) {
qSwap(oldDiffusedFBO, newDiffusedFBO);
}
newDiffusedFBO->bind();
if (_isFirstFrame) {
glClear(GL_COLOR_BUFFER_BIT);
} else {
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, oldDiffusedFBO->texture());
_diffuseProgram->bind();
QSize size = Application::getInstance()->getGLWidget()->size();
_diffuseProgram->setUniformValue(_diffusionScaleLocation, 1.0f / size.width(), 1.0f / size.height());
renderFullscreenQuad();
_diffuseProgram->release();
}
newDiffusedFBO->release();
// add diffused texture to the primary
glBindTexture(GL_TEXTURE_2D, newDiffusedFBO->texture());
if (toTexture) {
destFBO = oldDiffusedFBO;
}
maybeBind(destFBO);
_addSeparateProgram->bind();
renderFullscreenQuad();
_addSeparateProgram->release();
maybeRelease(destFBO);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
} else { // _renderMode == BLUR_ADD_MODE || _renderMode == BLUR_PERSIST_ADD_MODE
// render the primary to the secondary with the horizontal blur
QOpenGLFramebufferObject* secondaryFBO =
Application::getInstance()->getTextureCache()->getSecondaryFramebufferObject();
secondaryFBO->bind();
_horizontalBlurProgram->bind();
renderFullscreenQuad();
_horizontalBlurProgram->release();
secondaryFBO->release();
if (_renderMode == BLUR_ADD_MODE) {
// render the secondary to the screen with the vertical blur
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, secondaryFBO->texture());
if (toTexture) {
destFBO = Application::getInstance()->getTextureCache()->getTertiaryFramebufferObject();
}
maybeBind(destFBO);
_verticalBlurAddProgram->bind();
renderFullscreenQuad();
_verticalBlurAddProgram->release();
maybeRelease(destFBO);
} else { // _renderMode == BLUR_PERSIST_ADD_MODE
// render the secondary to the tertiary with vertical blur and persistence
QOpenGLFramebufferObject* tertiaryFBO =
Application::getInstance()->getTextureCache()->getTertiaryFramebufferObject();
tertiaryFBO->bind();
glEnable(GL_BLEND);
glBlendFunc(GL_ONE_MINUS_CONSTANT_ALPHA, GL_CONSTANT_ALPHA);
const float PERSISTENCE_SMOOTHING = 0.9f;
glBlendColor(0.0f, 0.0f, 0.0f, _isFirstFrame ? 0.0f : PERSISTENCE_SMOOTHING);
glBindTexture(GL_TEXTURE_2D, secondaryFBO->texture());
_verticalBlurProgram->bind();
renderFullscreenQuad();
_verticalBlurProgram->release();
glBlendColor(0.0f, 0.0f, 0.0f, 0.0f);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_CONSTANT_ALPHA, GL_ONE);
glDisable(GL_BLEND);
// now add the tertiary to the primary buffer
tertiaryFBO->release();
glBindTexture(GL_TEXTURE_2D, primaryFBO->texture());
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, tertiaryFBO->texture());
maybeBind(destFBO);
_addSeparateProgram->bind();
renderFullscreenQuad();
_addSeparateProgram->release();
maybeRelease(destFBO);
}
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
}
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glEnable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glBindTexture(GL_TEXTURE_2D, 0);
_isFirstFrame = false;
return destFBO;
}
void DeferredLightingEffect::render(RenderArgs* args) {
// perform deferred lighting, rendering to free fbo
glDisable(GL_BLEND);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glDisable(GL_COLOR_MATERIAL);
glDepthMask(false);
auto textureCache = DependencyManager::get<TextureCache>();
glBindFramebuffer(GL_FRAMEBUFFER, 0 );
QSize framebufferSize = textureCache->getFrameBufferSize();
// binding the first framebuffer
auto freeFBO = DependencyManager::get<GlowEffect>()->getFreeFramebuffer();
glBindFramebuffer(GL_FRAMEBUFFER, gpu::GLBackend::getFramebufferID(freeFBO));
glClear(GL_COLOR_BUFFER_BIT);
// glEnable(GL_FRAMEBUFFER_SRGB);
// glBindTexture(GL_TEXTURE_2D, primaryFBO->texture());
glBindTexture(GL_TEXTURE_2D, textureCache->getPrimaryColorTextureID());
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, textureCache->getPrimaryNormalTextureID());
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, textureCache->getPrimarySpecularTextureID());
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, textureCache->getPrimaryDepthTextureID());
// get the viewport side (left, right, both)
int viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
const int VIEWPORT_X_INDEX = 0;
const int VIEWPORT_Y_INDEX = 1;
const int VIEWPORT_WIDTH_INDEX = 2;
const int VIEWPORT_HEIGHT_INDEX = 3;
float sMin = viewport[VIEWPORT_X_INDEX] / (float)framebufferSize.width();
float sWidth = viewport[VIEWPORT_WIDTH_INDEX] / (float)framebufferSize.width();
float tMin = viewport[VIEWPORT_Y_INDEX] / (float)framebufferSize.height();
float tHeight = viewport[VIEWPORT_HEIGHT_INDEX] / (float)framebufferSize.height();
bool useSkyboxCubemap = (_skybox) && (_skybox->getCubemap());
// Fetch the ViewMatrix;
glm::mat4 invViewMat;
_viewState->getViewTransform().getMatrix(invViewMat);
ProgramObject* program = &_directionalLight;
const LightLocations* locations = &_directionalLightLocations;
bool shadowsEnabled = _viewState->getShadowsEnabled();
if (shadowsEnabled) {
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_2D, textureCache->getShadowDepthTextureID());
program = &_directionalLightShadowMap;
locations = &_directionalLightShadowMapLocations;
if (_viewState->getCascadeShadowsEnabled()) {
program = &_directionalLightCascadedShadowMap;
locations = &_directionalLightCascadedShadowMapLocations;
if (useSkyboxCubemap) {
program = &_directionalSkyboxLightCascadedShadowMap;
locations = &_directionalSkyboxLightCascadedShadowMapLocations;
} else if (_ambientLightMode > -1) {
program = &_directionalAmbientSphereLightCascadedShadowMap;
locations = &_directionalAmbientSphereLightCascadedShadowMapLocations;
}
program->bind();
program->setUniform(locations->shadowDistances, _viewState->getShadowDistances());
} else {
if (useSkyboxCubemap) {
program = &_directionalSkyboxLightShadowMap;
locations = &_directionalSkyboxLightShadowMapLocations;
} else if (_ambientLightMode > -1) {
program = &_directionalAmbientSphereLightShadowMap;
locations = &_directionalAmbientSphereLightShadowMapLocations;
}
program->bind();
}
program->setUniformValue(locations->shadowScale,
1.0f / textureCache->getShadowFramebuffer()->getWidth());
} else {
if (useSkyboxCubemap) {
program = &_directionalSkyboxLight;
locations = &_directionalSkyboxLightLocations;
} else if (_ambientLightMode > -1) {
program = &_directionalAmbientSphereLight;
locations = &_directionalAmbientSphereLightLocations;
}
program->bind();
}
{
auto globalLight = _allocatedLights[_globalLights.front()];
if (locations->ambientSphere >= 0) {
gpu::SphericalHarmonics sh = globalLight->getAmbientSphere();
if (useSkyboxCubemap && _skybox->getCubemap()->getIrradiance()) {
sh = (*_skybox->getCubemap()->getIrradiance());
}
for (int i =0; i <gpu::SphericalHarmonics::NUM_COEFFICIENTS; i++) {
program->setUniformValue(locations->ambientSphere + i, *(((QVector4D*) &sh) + i));
}
}
if (useSkyboxCubemap) {
glActiveTexture(GL_TEXTURE5);
glBindTexture(GL_TEXTURE_CUBE_MAP, gpu::GLBackend::getTextureID(_skybox->getCubemap()));
}
if (locations->lightBufferUnit >= 0) {
gpu::Batch batch;
batch.setUniformBuffer(locations->lightBufferUnit, globalLight->getSchemaBuffer());
gpu::GLBackend::renderBatch(batch);
}
if (_atmosphere && (locations->atmosphereBufferUnit >= 0)) {
gpu::Batch batch;
batch.setUniformBuffer(locations->atmosphereBufferUnit, _atmosphere->getDataBuffer());
gpu::GLBackend::renderBatch(batch);
}
glUniformMatrix4fv(locations->invViewMat, 1, false, reinterpret_cast< const GLfloat* >(&invViewMat));
}
float left, right, bottom, top, nearVal, farVal;
glm::vec4 nearClipPlane, farClipPlane;
_viewState->computeOffAxisFrustum(left, right, bottom, top, nearVal, farVal, nearClipPlane, farClipPlane);
program->setUniformValue(locations->nearLocation, nearVal);
float depthScale = (farVal - nearVal) / farVal;
program->setUniformValue(locations->depthScale, depthScale);
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;
program->setUniformValue(locations->depthTexCoordOffset, depthTexCoordOffsetS, depthTexCoordOffsetT);
program->setUniformValue(locations->depthTexCoordScale, depthTexCoordScaleS, depthTexCoordScaleT);
renderFullscreenQuad(sMin, sMin + sWidth, tMin, tMin + tHeight);
program->release();
if (useSkyboxCubemap) {
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
if (!shadowsEnabled) {
glActiveTexture(GL_TEXTURE3);
}
}
if (shadowsEnabled) {
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE3);
}
// additive blending
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glEnable(GL_CULL_FACE);
glm::vec4 sCoefficients(sWidth / 2.0f, 0.0f, 0.0f, sMin + sWidth / 2.0f);
glm::vec4 tCoefficients(0.0f, tHeight / 2.0f, 0.0f, tMin + tHeight / 2.0f);
glTexGenfv(GL_S, GL_OBJECT_PLANE, (const GLfloat*)&sCoefficients);
glTexGenfv(GL_T, GL_OBJECT_PLANE, (const GLfloat*)&tCoefficients);
// enlarge the scales slightly to account for tesselation
const float SCALE_EXPANSION = 0.05f;
const glm::vec3& eyePoint = _viewState->getCurrentViewFrustum()->getPosition();
float nearRadius = glm::distance(eyePoint, _viewState->getCurrentViewFrustum()->getNearTopLeft());
auto geometryCache = DependencyManager::get<GeometryCache>();
if (!_pointLights.empty()) {
_pointLight.bind();
_pointLight.setUniformValue(_pointLightLocations.nearLocation, nearVal);
_pointLight.setUniformValue(_pointLightLocations.depthScale, depthScale);
_pointLight.setUniformValue(_pointLightLocations.depthTexCoordOffset, depthTexCoordOffsetS, depthTexCoordOffsetT);
_pointLight.setUniformValue(_pointLightLocations.depthTexCoordScale, depthTexCoordScaleS, depthTexCoordScaleT);
for (auto lightID : _pointLights) {
auto light = _allocatedLights[lightID];
if (_pointLightLocations.lightBufferUnit >= 0) {
gpu::Batch batch;
batch.setUniformBuffer(_pointLightLocations.lightBufferUnit, light->getSchemaBuffer());
gpu::GLBackend::renderBatch(batch);
}
glUniformMatrix4fv(_pointLightLocations.invViewMat, 1, false, reinterpret_cast< const GLfloat* >(&invViewMat));
glPushMatrix();
float expandedRadius = light->getMaximumRadius() * (1.0f + SCALE_EXPANSION);
if (glm::distance(eyePoint, glm::vec3(light->getPosition())) < expandedRadius + nearRadius) {
glLoadIdentity();
glTranslatef(0.0f, 0.0f, -1.0f);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
renderFullscreenQuad();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
} else {
glTranslatef(light->getPosition().x, light->getPosition().y, light->getPosition().z);
geometryCache->renderSphere(expandedRadius, 32, 32, glm::vec4(1.0f, 1.0f, 1.0f, 1.0f));
}
glPopMatrix();
}
_pointLights.clear();
_pointLight.release();
}
if (!_spotLights.empty()) {
_spotLight.bind();
_spotLight.setUniformValue(_spotLightLocations.nearLocation, nearVal);
_spotLight.setUniformValue(_spotLightLocations.depthScale, depthScale);
_spotLight.setUniformValue(_spotLightLocations.depthTexCoordOffset, depthTexCoordOffsetS, depthTexCoordOffsetT);
_spotLight.setUniformValue(_spotLightLocations.depthTexCoordScale, depthTexCoordScaleS, depthTexCoordScaleT);
for (auto lightID : _spotLights) {
auto light = _allocatedLights[lightID];
if (_spotLightLocations.lightBufferUnit >= 0) {
gpu::Batch batch;
batch.setUniformBuffer(_spotLightLocations.lightBufferUnit, light->getSchemaBuffer());
gpu::GLBackend::renderBatch(batch);
}
glUniformMatrix4fv(_spotLightLocations.invViewMat, 1, false, reinterpret_cast< const GLfloat* >(&invViewMat));
glPushMatrix();
float expandedRadius = light->getMaximumRadius() * (1.0f + SCALE_EXPANSION);
float edgeRadius = expandedRadius / glm::cos(light->getSpotAngle());
if (glm::distance(eyePoint, glm::vec3(light->getPosition())) < edgeRadius + nearRadius) {
glLoadIdentity();
glTranslatef(0.0f, 0.0f, -1.0f);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
renderFullscreenQuad();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
} else {
glTranslatef(light->getPosition().x, light->getPosition().y, light->getPosition().z);
glm::quat spotRotation = rotationBetween(glm::vec3(0.0f, 0.0f, -1.0f), light->getDirection());
glm::vec3 axis = glm::axis(spotRotation);
glRotatef(glm::degrees(glm::angle(spotRotation)), axis.x, axis.y, axis.z);
glTranslatef(0.0f, 0.0f, -light->getMaximumRadius() * (1.0f + SCALE_EXPANSION * 0.5f));
geometryCache->renderCone(expandedRadius * glm::tan(light->getSpotAngle()),
expandedRadius, 32, 1);
}
glPopMatrix();
}
_spotLights.clear();
_spotLight.release();
}
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, 0);
// glDisable(GL_FRAMEBUFFER_SRGB);
// End of the Lighting pass
}
QOpenGLFramebufferObject* GlowEffect::render(bool toTexture) {
PerformanceTimer perfTimer("glowEffect");
TextureCache* textureCache = DependencyManager::get<TextureCache>();
QOpenGLFramebufferObject* primaryFBO = textureCache->getPrimaryFramebufferObject();
primaryFBO->release();
glBindTexture(GL_TEXTURE_2D, primaryFBO->texture());
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
QOpenGLFramebufferObject* destFBO = toTexture ?
textureCache->getSecondaryFramebufferObject() : NULL;
if (!Menu::getInstance()->isOptionChecked(MenuOption::EnableGlowEffect) || _isEmpty) {
// copy the primary to the screen
if (destFBO && QOpenGLFramebufferObject::hasOpenGLFramebufferBlit()) {
QOpenGLFramebufferObject::blitFramebuffer(destFBO, primaryFBO);
} else {
maybeBind(destFBO);
if (!destFBO) {
glViewport(0, 0, Application::getInstance()->getGLWidget()->getDeviceWidth(),
Application::getInstance()->getGLWidget()->getDeviceHeight());
}
glEnable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glColor3f(1.0f, 1.0f, 1.0f);
renderFullscreenQuad();
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
maybeRelease(destFBO);
}
} else {
// diffuse into the secondary/tertiary (alternating between frames)
QOpenGLFramebufferObject* oldDiffusedFBO =
textureCache->getSecondaryFramebufferObject();
QOpenGLFramebufferObject* newDiffusedFBO =
textureCache->getTertiaryFramebufferObject();
if (_isOddFrame) {
qSwap(oldDiffusedFBO, newDiffusedFBO);
}
newDiffusedFBO->bind();
if (_isFirstFrame) {
glClear(GL_COLOR_BUFFER_BIT);
} else {
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, oldDiffusedFBO->texture());
_diffuseProgram->bind();
QSize size = primaryFBO->size();
_diffuseProgram->setUniformValue(_diffusionScaleLocation, 1.0f / size.width(), 1.0f / size.height());
renderFullscreenQuad();
_diffuseProgram->release();
}
newDiffusedFBO->release();
// add diffused texture to the primary
glBindTexture(GL_TEXTURE_2D, newDiffusedFBO->texture());
if (toTexture) {
destFBO = oldDiffusedFBO;
}
maybeBind(destFBO);
if (!destFBO) {
glViewport(0, 0,
Application::getInstance()->getGLWidget()->getDeviceWidth(),
Application::getInstance()->getGLWidget()->getDeviceHeight());
}
_addSeparateProgram->bind();
renderFullscreenQuad();
_addSeparateProgram->release();
maybeRelease(destFBO);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
}
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glEnable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glBindTexture(GL_TEXTURE_2D, 0);
_isFirstFrame = false;
return destFBO;
}
void DeferredLightingEffect::render() {
// perform deferred lighting, rendering to free fbo
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
glDisable(GL_BLEND);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glDisable(GL_COLOR_MATERIAL);
glDepthMask(false);
QOpenGLFramebufferObject* primaryFBO = Application::getInstance()->getTextureCache()->getPrimaryFramebufferObject();
primaryFBO->release();
QOpenGLFramebufferObject* freeFBO = Application::getInstance()->getGlowEffect()->getFreeFramebufferObject();
freeFBO->bind();
glClear(GL_COLOR_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, primaryFBO->texture());
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, Application::getInstance()->getTextureCache()->getPrimaryNormalTextureID());
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, Application::getInstance()->getTextureCache()->getPrimarySpecularTextureID());
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, Application::getInstance()->getTextureCache()->getPrimaryDepthTextureID());
// get the viewport side (left, right, both)
int viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
const int VIEWPORT_X_INDEX = 0;
const int VIEWPORT_Y_INDEX = 1;
const int VIEWPORT_WIDTH_INDEX = 2;
const int VIEWPORT_HEIGHT_INDEX = 3;
float sMin = viewport[VIEWPORT_X_INDEX] / (float)primaryFBO->width();
float sWidth = viewport[VIEWPORT_WIDTH_INDEX] / (float)primaryFBO->width();
float tMin = viewport[VIEWPORT_Y_INDEX] / (float)primaryFBO->height();
float tHeight = viewport[VIEWPORT_HEIGHT_INDEX] / (float)primaryFBO->height();
ProgramObject* program = &_directionalLight;
const LightLocations* locations = &_directionalLightLocations;
bool shadowsEnabled = Menu::getInstance()->getShadowsEnabled();
if (shadowsEnabled) {
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_2D, Application::getInstance()->getTextureCache()->getShadowDepthTextureID());
program = &_directionalLightShadowMap;
locations = &_directionalLightShadowMapLocations;
if (Menu::getInstance()->isOptionChecked(MenuOption::CascadedShadows)) {
program = &_directionalLightCascadedShadowMap;
locations = &_directionalLightCascadedShadowMapLocations;
_directionalLightCascadedShadowMap.bind();
_directionalLightCascadedShadowMap.setUniform(locations->shadowDistances,
Application::getInstance()->getShadowDistances());
} else {
program->bind();
}
program->setUniformValue(locations->shadowScale,
1.0f / Application::getInstance()->getTextureCache()->getShadowFramebufferObject()->width());
} else {
program->bind();
}
float left, right, bottom, top, nearVal, farVal;
glm::vec4 nearClipPlane, farClipPlane;
Application::getInstance()->computeOffAxisFrustum(
left, right, bottom, top, nearVal, farVal, nearClipPlane, farClipPlane);
program->setUniformValue(locations->nearLocation, nearVal);
float depthScale = (farVal - nearVal) / farVal;
program->setUniformValue(locations->depthScale, depthScale);
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;
program->setUniformValue(locations->depthTexCoordOffset, depthTexCoordOffsetS, depthTexCoordOffsetT);
program->setUniformValue(locations->depthTexCoordScale, depthTexCoordScaleS, depthTexCoordScaleT);
renderFullscreenQuad(sMin, sMin + sWidth, tMin, tMin + tHeight);
program->release();
if (shadowsEnabled) {
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE3);
}
// additive blending
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glEnable(GL_CULL_FACE);
glm::vec4 sCoefficients(sWidth / 2.0f, 0.0f, 0.0f, sMin + sWidth / 2.0f);
glm::vec4 tCoefficients(0.0f, tHeight / 2.0f, 0.0f, tMin + tHeight / 2.0f);
glTexGenfv(GL_S, GL_OBJECT_PLANE, (const GLfloat*)&sCoefficients);
glTexGenfv(GL_T, GL_OBJECT_PLANE, (const GLfloat*)&tCoefficients);
// enlarge the scales slightly to account for tesselation
const float SCALE_EXPANSION = 0.05f;
const glm::vec3& eyePoint = Application::getInstance()->getDisplayViewFrustum()->getPosition();
float nearRadius = glm::distance(eyePoint, Application::getInstance()->getDisplayViewFrustum()->getNearTopLeft());
if (!_pointLights.isEmpty()) {
_pointLight.bind();
_pointLight.setUniformValue(_pointLightLocations.nearLocation, nearVal);
_pointLight.setUniformValue(_pointLightLocations.depthScale, depthScale);
_pointLight.setUniformValue(_pointLightLocations.depthTexCoordOffset, depthTexCoordOffsetS, depthTexCoordOffsetT);
_pointLight.setUniformValue(_pointLightLocations.depthTexCoordScale, depthTexCoordScaleS, depthTexCoordScaleT);
foreach (const PointLight& light, _pointLights) {
_pointLight.setUniformValue(_pointLightLocations.radius, light.radius);
glLightfv(GL_LIGHT1, GL_AMBIENT, (const GLfloat*)&light.ambient);
glLightfv(GL_LIGHT1, GL_DIFFUSE, (const GLfloat*)&light.diffuse);
glLightfv(GL_LIGHT1, GL_SPECULAR, (const GLfloat*)&light.specular);
glLightfv(GL_LIGHT1, GL_POSITION, (const GLfloat*)&light.position);
glLightf(GL_LIGHT1, GL_CONSTANT_ATTENUATION, (light.constantAttenuation > 0.0f ? light.constantAttenuation : 0.0f));
glLightf(GL_LIGHT1, GL_LINEAR_ATTENUATION, (light.linearAttenuation > 0.0f ? light.linearAttenuation : 0.0f));
glLightf(GL_LIGHT1, GL_QUADRATIC_ATTENUATION, (light.quadraticAttenuation > 0.0f ? light.quadraticAttenuation : 0.0f));
glPushMatrix();
float expandedRadius = light.radius * (1.0f + SCALE_EXPANSION);
if (glm::distance(eyePoint, glm::vec3(light.position)) < expandedRadius + nearRadius) {
glLoadIdentity();
glTranslatef(0.0f, 0.0f, -1.0f);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
renderFullscreenQuad();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
} else {
glTranslatef(light.position.x, light.position.y, light.position.z);
Application::getInstance()->getGeometryCache()->renderSphere(expandedRadius, 32, 32);
}
glPopMatrix();
}
