GeometryBuffer.cpp

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#include <tdme/engine/GeometryBuffer.h>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/framebuffer/DeferredLightingRenderShader.h>
#include <tdme/engine/subsystems/framebuffer/FrameBufferRenderShader.h>
#include <tdme/engine/subsystems/postprocessing/PostProcessingShader.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
#include <tdme/engine/Engine.h>
#include <tdme/math/Math.h>
#include <tdme/utilities/Console.h>
#include <tdme/utilities/Float.h>
 
using tdme::engine::GeometryBuffer;
 
using tdme::engine::subsystems::framebuffer::DeferredLightingRenderShader;
using tdme::engine::subsystems::framebuffer::FrameBufferRenderShader;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::Engine;
using tdme::math::Math;
using tdme::utilities::Console;
using tdme::utilities::Float;
 
GeometryBuffer::GeometryBuffer(int32_t width, int32_t height)
{
    this->width = width;
    this->height = height;
    this->frameBufferId = -1;
    this->depthBufferTextureId = Engine::renderer->ID_NONE;
    this->geometryBufferTextureId1 = Engine::renderer->ID_NONE;
    this->geometryBufferTextureId2 = Engine::renderer->ID_NONE;
    this->geometryBufferTextureId3 = Engine::renderer->ID_NONE;
    this->colorBufferTextureId1 = Engine::renderer->ID_NONE;
    this->colorBufferTextureId2 = Engine::renderer->ID_NONE;
    this->colorBufferTextureId3 = Engine::renderer->ID_NONE;
    this->colorBufferTextureId4 = Engine::renderer->ID_NONE;
    this->colorBufferTextureId5 = Engine::renderer->ID_NONE;
}
 
void GeometryBuffer::initialize()
{
    depthBufferTextureId = Engine::renderer->createDepthBufferTexture(width, height, 0, 0);
    geometryBufferTextureId1 = Engine::renderer->createGBufferGeometryTexture(width, height);
    geometryBufferTextureId2 = Engine::renderer->createGBufferGeometryTexture(width, height);
    geometryBufferTextureId3 = Engine::renderer->createGBufferGeometryTexture(width, height);
    colorBufferTextureId1 = Engine::renderer->createGBufferColorTexture(width, height);
    colorBufferTextureId2 = Engine::renderer->createGBufferColorTexture(width, height);
    colorBufferTextureId3 = Engine::renderer->createGBufferColorTexture(width, height);
    colorBufferTextureId4 = Engine::renderer->createGBufferColorTexture(width, height);
    colorBufferTextureId5 = Engine::renderer->createGBufferColorTexture(width, height);
    frameBufferId = Engine::renderer->createGeometryBufferObject(
        depthBufferTextureId,
        geometryBufferTextureId1,
        geometryBufferTextureId2,
        geometryBufferTextureId3,
        colorBufferTextureId1,
        colorBufferTextureId2,
        colorBufferTextureId3,
        colorBufferTextureId4,
        colorBufferTextureId5
    );
}
 
void GeometryBuffer::reshape(int32_t width, int32_t height)
{
    this->width = width;
    this->height = height;
    Engine::renderer->resizeDepthBufferTexture(depthBufferTextureId, width, height);
    Engine::renderer->resizeGBufferGeometryTexture(geometryBufferTextureId1, width, height);
    Engine::renderer->resizeGBufferGeometryTexture(geometryBufferTextureId2, width, height);
    Engine::renderer->resizeGBufferGeometryTexture(geometryBufferTextureId3, width, height);
    Engine::renderer->resizeGBufferColorTexture(colorBufferTextureId1, width, height);
    Engine::renderer->resizeGBufferColorTexture(colorBufferTextureId2, width, height);
    Engine::renderer->resizeGBufferColorTexture(colorBufferTextureId3, width, height);
    Engine::renderer->resizeGBufferColorTexture(colorBufferTextureId4, width, height);
    Engine::renderer->resizeGBufferColorTexture(colorBufferTextureId5, width, height);
}
 
void GeometryBuffer::dispose()
{
    Engine::renderer->disposeTexture(depthBufferTextureId);
    Engine::renderer->disposeTexture(geometryBufferTextureId1);
    Engine::renderer->disposeTexture(geometryBufferTextureId2);
    Engine::renderer->disposeTexture(geometryBufferTextureId3);
    Engine::renderer->disposeTexture(colorBufferTextureId1);
    Engine::renderer->disposeTexture(colorBufferTextureId2);
    Engine::renderer->disposeTexture(colorBufferTextureId3);
    Engine::renderer->disposeTexture(colorBufferTextureId4);
    Engine::renderer->disposeTexture(colorBufferTextureId5);
    // TODO: Vulkan might need a extra method here
    Engine::renderer->disposeFrameBufferObject(frameBufferId);
}
 
void GeometryBuffer::enableGeometryBuffer()
{
    Engine::renderer->bindFrameBuffer(frameBufferId);
    Engine::renderer->setViewPort(width, height);
    Engine::renderer->updateViewPort();
}
 
void GeometryBuffer::disableGeometryBuffer()
{
    Engine::renderer->bindFrameBuffer(Engine::renderer->FRAMEBUFFER_DEFAULT);
    Engine::renderer->setViewPort(Engine::instance->width, Engine::instance->height);
    Engine::renderer->updateViewPort();
}
 
void GeometryBuffer::renderToScreen(Engine* engine)
{
    auto renderer = Engine::renderer;
 
    // use default context
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
 
    //
    renderer->disableCulling(contextIdx);
 
    // clear
    renderer->setClearColor(engine->sceneColor.getRed(), engine->sceneColor.getGreen(), engine->sceneColor.getBlue(), engine->sceneColor.getAlpha());
    renderer->clear(renderer->CLEAR_COLOR_BUFFER_BIT | renderer->CLEAR_DEPTH_BUFFER_BIT);
 
    // use deferred lighting render shader
    auto frameBufferRenderShader = Engine::getFrameBufferRenderShader();
    auto deferredLightingRenderShader = Engine::getDeferredLightingRenderShader();
    deferredLightingRenderShader->useProgram(engine);
 
    // bind geometry buffer textures
    renderer->setTextureUnit(contextIdx, 0);
    renderer->bindTexture(contextIdx, geometryBufferTextureId1);
    renderer->setTextureUnit(contextIdx, 1);
    renderer->bindTexture(contextIdx, geometryBufferTextureId2);
    renderer->setTextureUnit(contextIdx, 2);
    renderer->bindTexture(contextIdx, geometryBufferTextureId3);
 
    // bind color buffer textures
    renderer->setTextureUnit(contextIdx, 3);
    renderer->bindTexture(contextIdx, colorBufferTextureId1);
    renderer->setTextureUnit(contextIdx, 4);
    renderer->bindTexture(contextIdx, colorBufferTextureId2);
    renderer->setTextureUnit(contextIdx, 5);
    renderer->bindTexture(contextIdx, colorBufferTextureId3);
    renderer->setTextureUnit(contextIdx, 6);
    renderer->bindTexture(contextIdx, colorBufferTextureId4);
    renderer->setTextureUnit(contextIdx, 7);
    renderer->bindTexture(contextIdx, colorBufferTextureId5);
 
    // bind depth buffer texture
    renderer->setTextureUnit(contextIdx, 8);
    renderer->bindTexture(contextIdx, depthBufferTextureId);
 
    //
    renderer->bindVerticesBufferObject(contextIdx, frameBufferRenderShader->getVBOVertices());
    renderer->bindTextureCoordinatesBufferObject(contextIdx, frameBufferRenderShader->getVBOTextureCoordinates());
 
    // draw
    renderer->drawTrianglesFromBufferObjects(contextIdx, 2, 0);
 
    // unbind buffers
    renderer->unbindBufferObjects(contextIdx);
 
    // unbind geometry buffer textures
    renderer->setTextureUnit(contextIdx, 0);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
    renderer->setTextureUnit(contextIdx, 1);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
    renderer->setTextureUnit(contextIdx, 2);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
 
    // unbind color buffer textures
    renderer->setTextureUnit(contextIdx, 3);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
    renderer->setTextureUnit(contextIdx, 4);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
    renderer->setTextureUnit(contextIdx, 5);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
    renderer->setTextureUnit(contextIdx, 6);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
    renderer->setTextureUnit(contextIdx, 7);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
 
    // unbind depth buffer texture
    renderer->setTextureUnit(contextIdx, 8);
    renderer->bindTexture(contextIdx, renderer->ID_NONE);
 
    // switch back to diffuse texture unit
    renderer->setTextureUnit(contextIdx, 0);
 
    //
    deferredLightingRenderShader->unUseProgram();
 
    // unset
    renderer->enableCulling(contextIdx);
}