FrameBufferRenderShader.cpp

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#include <tdme/engine/subsystems/framebuffer/FrameBufferRenderShader.h>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/manager/VBOManager.h>
#include <tdme/engine/subsystems/manager/VBOManager_VBOManaged.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
#include <tdme/engine/subsystems/rendering/ObjectBuffer.h>
#include <tdme/engine/Engine.h>
 
#include <tdme/utilities/ByteBuffer.h>
#include <tdme/utilities/FloatBuffer.h>
 
using tdme::engine::subsystems::framebuffer::FrameBufferRenderShader;
using tdme::engine::subsystems::manager::VBOManager;
using tdme::engine::subsystems::manager::VBOManager_VBOManaged;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::subsystems::rendering::ObjectBuffer;
using tdme::engine::Engine;
using tdme::utilities::ByteBuffer;
using tdme::utilities::FloatBuffer;
 
FrameBufferRenderShader::FrameBufferRenderShader(Renderer* renderer)
{
    this->renderer = renderer;
    initialized = false;
    isRunning = false;
}
 
FrameBufferRenderShader::~FrameBufferRenderShader()
{
    Engine::getInstance()->getVBOManager()->removeVBO("framebuffer_render_shader.vbos");
}
 
bool FrameBufferRenderShader::isInitialized()
{
    return initialized;
}
 
void FrameBufferRenderShader::initialize()
{
    auto shaderVersion = renderer->getShaderVersion();
    vertexShaderId = renderer->loadShader(
        renderer->SHADER_VERTEX_SHADER,
        "shader/" + shaderVersion + "/framebuffer",
        "render_vertexshader.vert"
    );
    if (vertexShaderId == 0) return;
 
    fragmentShaderId = renderer->loadShader(
        renderer->SHADER_FRAGMENT_SHADER,
        "shader/" + shaderVersion + "/framebuffer",
        "render_fragmentshader.frag"
    );
    if (fragmentShaderId == 0) return;
 
    programId = renderer->createProgram(renderer->PROGRAM_OBJECTS);
    renderer->attachShaderToProgram(programId, vertexShaderId);
    renderer->attachShaderToProgram(programId, fragmentShaderId);
    if (renderer->isUsingProgramAttributeLocation() == true) {
        renderer->setProgramAttributeLocation(programId, 0, "inVertex");
        renderer->setProgramAttributeLocation(programId, 2, "inTextureUV");
    }
    if (renderer->linkProgram(programId) == false) return;
 
    // uniforms
    uniformColorBufferTextureUnit = renderer->getProgramUniformLocation(programId, "colorBufferTextureUnit");
    if (uniformColorBufferTextureUnit == -1) return;
 
    uniformDepthBufferTextureUnit = renderer->getProgramUniformLocation(programId, "depthBufferTextureUnit");
 
    //
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
 
    // create vbos
    auto created = false;
    auto vboManaged = Engine::getInstance()->getVBOManager()->addVBO("framebuffer_render_shader.vbos", 2, true, false, created);
    vboVertices = (*vboManaged->getVBOIds())[0];
    vboTextureCoordinates = (*vboManaged->getVBOIds())[1];
 
    // vertices
    {
        auto fbVertices = ObjectBuffer::getByteBuffer(contextIdx, 6 * 3 * sizeof(float))->asFloatBuffer();
 
        fbVertices.put(-1.0f); fbVertices.put(+1.0f); fbVertices.put(0.0f);
        fbVertices.put(+1.0f); fbVertices.put(+1.0f); fbVertices.put(0.0f);
        fbVertices.put(+1.0f); fbVertices.put(-1.0f); fbVertices.put(0.0f);
 
        fbVertices.put(+1.0f); fbVertices.put(-1.0f); fbVertices.put(0.0f);
        fbVertices.put(-1.0f); fbVertices.put(-1.0f); fbVertices.put(0.0f);
        fbVertices.put(-1.0f); fbVertices.put(+1.0f); fbVertices.put(0.0f);
 
        renderer->uploadBufferObject(contextIdx, vboVertices, fbVertices.getPosition() * sizeof(float), &fbVertices);
    }
 
    // texture coordinates
    {
        auto fbTextureCoordinates = ObjectBuffer::getByteBuffer(contextIdx, 6 * 2 * sizeof(float))->asFloatBuffer();
 
        if (renderer->getRendererType() == Renderer::RENDERERTYPE_VULKAN) {
            fbTextureCoordinates.put(+0.0f); fbTextureCoordinates.put(0.0f);
            fbTextureCoordinates.put(+1.0f); fbTextureCoordinates.put(0.0f);
            fbTextureCoordinates.put(+1.0f); fbTextureCoordinates.put(1.0f);
 
            fbTextureCoordinates.put(+1.0f); fbTextureCoordinates.put(1.0f);
            fbTextureCoordinates.put(+0.0f); fbTextureCoordinates.put(1.0f);
            fbTextureCoordinates.put(+0.0f); fbTextureCoordinates.put(0.0f);
        } else {
            fbTextureCoordinates.put(+0.0f); fbTextureCoordinates.put(+1.0f);
            fbTextureCoordinates.put(+1.0f); fbTextureCoordinates.put(+1.0f);
            fbTextureCoordinates.put(+1.0f); fbTextureCoordinates.put(0.0f);
 
            fbTextureCoordinates.put(+1.0f); fbTextureCoordinates.put(0.0f);
            fbTextureCoordinates.put(+0.0f); fbTextureCoordinates.put(0.0f);
            fbTextureCoordinates.put(+0.0f); fbTextureCoordinates.put(+1.0f);
        }
 
        renderer->uploadBufferObject(contextIdx, vboTextureCoordinates, fbTextureCoordinates.getPosition() * sizeof(float), &fbTextureCoordinates);
    }
 
    //
    initialized = true;
}
 
void FrameBufferRenderShader::useProgram()
{
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
    renderer->useProgram(contextIdx, programId);
    renderer->setLighting(contextIdx, renderer->LIGHTING_NONE);
    renderer->setProgramUniformInteger(contextIdx, uniformColorBufferTextureUnit, 0);
    if (uniformDepthBufferTextureUnit != -1) renderer->setProgramUniformInteger(contextIdx, uniformDepthBufferTextureUnit, 1);
    isRunning = true;
}
 
void FrameBufferRenderShader::unUseProgram()
{
    isRunning = false;
}