void PostProcessor::render() const
{
if (!frameBuffer.get() || !tempFrameBuffer.get() || !bloomFrameBuffer.get() || !depthOfFieldFrameBuffer.get() || !blurTexture1DArray.get() || !bloomTexture1DArray.get() || !depthOfFieldTexture1DArray.get() )
{
return;
}
CameraSP currentCamera = CameraManager::getInstance()->getDefaultOrthographicCamera();
Matrix4x4 modelMatrix;
modelMatrix.scale(static_cast<GLfloat>(frameBuffer->getWidth()), static_cast<GLfloat>(frameBuffer->getHeight()), 1.0f);
program->use();
setUniforms();
glDepthMask(GL_FALSE);
glDisable(GL_DEPTH_TEST);
glUniformMatrix4fv(program->getUniformLocation(u_projectionMatrix), 1, GL_FALSE, currentCamera->getProjectionMatrix().getM());
glUniformMatrix4fv(program->getUniformLocation(u_viewMatrix), 1, GL_FALSE, currentCamera->getViewMatrix().getM());
glUniformMatrix4fv(program->getUniformLocation(u_modelMatrix), 1, GL_FALSE, modelMatrix.getM());
//
const CameraSP& defaultCamera = CameraManager::getInstance()->getDefaultPerspectiveCamera();
Point4 focalPoint = defaultCamera->getEye() + (defaultCamera->getDirection() * focal);
Point4 focusedObjectPoint = defaultCamera->getEye() + (defaultCamera->getDirection() * focusedObject);
Point4 biasedFocalPoint = defaultCamera->getBiasedProjectionMatrix() * defaultCamera->getViewMatrix() * focalPoint;
Point4 biasedFocusedObjectPoint = defaultCamera->getBiasedProjectionMatrix() * defaultCamera->getViewMatrix() * focusedObjectPoint;
glUniform1f(program->getUniformLocation(u_aperture), aperture);
glUniform1f(program->getUniformLocation(u_focal), glusClampf(biasedFocalPoint.getZ(), 0.0f, 1.0f));
glUniform1f(program->getUniformLocation(u_focusedObject), glusClampf(biasedFocusedObjectPoint.getZ(), 0.0f, 1.0f));
//
// Depth texture
glActiveTexture(GL_TEXTURE3);
glBindTexture(target, frameBuffer->getDepthTexture()->getTextureName());
glUniform1i(program->getUniformLocation(depthTexture), 3);
glActiveTexture(GL_TEXTURE0);
// Create bloom textures
if (useBloom)
{
use(false);
// Only the bright texture is needed
glActiveTexture(GL_TEXTURE0);
glBindTexture(target, frameBuffer->getColor1Texture()->getTextureName());
glUniform1i(program->getUniformLocation(screenTexture), 0);
// Not used. Just take the color texture as a dummy value
glActiveTexture(GL_TEXTURE1);
glBindTexture(target, frameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(bloomTexture), 1);
// Blur using the bloom texture
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_1D_ARRAY, bloomTexture1DArray->getTextureName());
glUniform1i(program->getUniformLocation(u_blurTexture), 2);
glActiveTexture(GL_TEXTURE0);
glUniform1i(program->getUniformLocation(u_useDoF), false);
glUniform1i(program->getUniformLocation(u_useBlur), true);
glUniform1i(program->getUniformLocation(u_useBloom), false);
glUniform1f(program->getUniformLocation(u_bloomLevel), bloomLevel);
glUniform1i(program->getUniformLocation(u_useExposure), false);
glUniform1f(program->getUniformLocation(u_exposure), exposure);
glUniform1i(program->getUniformLocation(u_useGamma), false);
glUniform1f(program->getUniformLocation(u_gamma), gamma);
postProcessorVAO->bind();
// First pass ...
glUniform1i(program->getUniformLocation(u_blurHorizontal), 1);
glUniform1i(program->getUniformLocation(u_blurVertical), 0);
tempFrameBuffer->use(true);
glDrawElements(GL_TRIANGLES, numberIndices, GL_UNSIGNED_INT, 0);
tempFrameBuffer->use(false);
// ... and final pass
glBindTexture(target, tempFrameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(u_blurHorizontal), 0);
glUniform1i(program->getUniformLocation(u_blurVertical), 1);
bloomFrameBuffer->use(true);
glDrawElements(GL_TRIANGLES, numberIndices, GL_UNSIGNED_INT, 0);
bloomFrameBuffer->use(false);
//
postProcessorVAO->unbind();
glBindTexture(target, 0);
}
FrameBufferSP usedFrameBuffer = frameBuffer;
// Bloom the framebuffer
if (useBloom)
{
use(false);
// Original frame buffer
glActiveTexture(GL_TEXTURE0);
glBindTexture(target, frameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(screenTexture), 0);
// Bloom
glActiveTexture(GL_TEXTURE1);
glBindTexture(target, bloomFrameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(bloomTexture), 1);
// Dummy
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_1D_ARRAY, bloomTexture1DArray->getTextureName());
glUniform1i(program->getUniformLocation(u_blurTexture), 2);
glActiveTexture(GL_TEXTURE0);
glUniform1i(program->getUniformLocation(u_useDoF), false);
glUniform1i(program->getUniformLocation(u_useBlur), false);
glUniform1i(program->getUniformLocation(u_useBloom), true);
glUniform1f(program->getUniformLocation(u_bloomLevel), bloomLevel);
glUniform1i(program->getUniformLocation(u_useExposure), false);
glUniform1f(program->getUniformLocation(u_exposure), exposure);
glUniform1i(program->getUniformLocation(u_useGamma), false);
glUniform1f(program->getUniformLocation(u_gamma), gamma);
glUniform1i(program->getUniformLocation(u_blurHorizontal), 0);
glUniform1i(program->getUniformLocation(u_blurVertical), 0);
postProcessorVAO->bind();
// One pass
tempFrameBuffer->use(true);
glDrawElements(GL_TRIANGLES, numberIndices, GL_UNSIGNED_INT, 0);
tempFrameBuffer->use(false);
//
postProcessorVAO->unbind();
glBindTexture(target, 0);
usedFrameBuffer = tempFrameBuffer;
}
// Depth of field
if (useDoF)
{
use(false);
// Only the color texture is needed
glActiveTexture(GL_TEXTURE0);
glBindTexture(target, usedFrameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(screenTexture), 0);
// Not used. Just take the color texture as a dummy value
glActiveTexture(GL_TEXTURE1);
glBindTexture(target, frameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(bloomTexture), 1);
// Blur using the DOF texture
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_1D_ARRAY, depthOfFieldTexture1DArray->getTextureName());
glUniform1i(program->getUniformLocation(u_blurTexture), 2);
glActiveTexture(GL_TEXTURE0);
glUniform1i(program->getUniformLocation(u_useDoF), true);
glUniform1i(program->getUniformLocation(u_useBlur), false);
glUniform1i(program->getUniformLocation(u_useBloom), false);
glUniform1f(program->getUniformLocation(u_bloomLevel), bloomLevel);
glUniform1i(program->getUniformLocation(u_useExposure), false);
glUniform1f(program->getUniformLocation(u_exposure), exposure);
glUniform1i(program->getUniformLocation(u_useGamma), false);
glUniform1f(program->getUniformLocation(u_gamma), gamma);
postProcessorVAO->bind();
// First pass ...
glUniform1i(program->getUniformLocation(u_blurHorizontal), 1);
glUniform1i(program->getUniformLocation(u_blurVertical), 0);
tempFrameBuffer->use(true);
glDrawElements(GL_TRIANGLES, numberIndices, GL_UNSIGNED_INT, 0);
tempFrameBuffer->use(false);
// ... and final pass
glBindTexture(target, tempFrameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(u_blurHorizontal), 0);
glUniform1i(program->getUniformLocation(u_blurVertical), 1);
depthOfFieldFrameBuffer->use(true);
glDrawElements(GL_TRIANGLES, numberIndices, GL_UNSIGNED_INT, 0);
depthOfFieldFrameBuffer->use(false);
//
postProcessorVAO->unbind();
glBindTexture(target, 0);
usedFrameBuffer = depthOfFieldFrameBuffer;
}
//
use(false);
// Color
glActiveTexture(GL_TEXTURE0);
glBindTexture(target, usedFrameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(screenTexture), 0);
// Not used.
glActiveTexture(GL_TEXTURE1);
glBindTexture(target, bloomFrameBuffer->getColor0Texture()->getTextureName());
glUniform1i(program->getUniformLocation(bloomTexture), 1);
// Blur
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_1D_ARRAY, blurTexture1DArray->getTextureName());
glUniform1i(program->getUniformLocation(u_blurTexture), 2);
glActiveTexture(GL_TEXTURE0);
glUniform1i(program->getUniformLocation(u_useDoF), false);
glUniform1i(program->getUniformLocation(u_useBlur), useBlur);
glUniform1i(program->getUniformLocation(u_blurHorizontal), 1);
glUniform1i(program->getUniformLocation(u_blurVertical), 1);
glUniform1i(program->getUniformLocation(u_useBloom), false);
glUniform1f(program->getUniformLocation(u_bloomLevel), bloomLevel);
glUniform1i(program->getUniformLocation(u_useExposure), useExposure);
glUniform1f(program->getUniformLocation(u_exposure), exposure);
glUniform1i(program->getUniformLocation(u_useGamma), useGamma);
glUniform1f(program->getUniformLocation(u_gamma), gamma);
postProcessorVAO->bind();
glDrawElements(GL_TRIANGLES, numberIndices, GL_UNSIGNED_INT, 0);
postProcessorVAO->unbind();
//
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glBindTexture(target, 0);
}
