PostProcessingShaderDesaturationImplementation.cpp

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#include <tdme/engine/subsystems/postprocessing/PostProcessingShaderDesaturationImplementation.h>
 
#include <string>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/postprocessing/PostProcessingShaderBaseImplementation.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
#include <tdme/engine/Engine.h>
#include <tdme/engine/ShaderParameter.h>
 
using std::string;
 
using tdme::engine::subsystems::postprocessing::PostProcessingShaderDesaturationImplementation;
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::Engine;
using tdme::engine::ShaderParameter;
 
bool PostProcessingShaderDesaturationImplementation::isSupported(Renderer* renderer) {
    return renderer->getShaderVersion() == "gl3";
}
 
PostProcessingShaderDesaturationImplementation::PostProcessingShaderDesaturationImplementation(Renderer* renderer): PostProcessingShaderBaseImplementation(renderer)
{
}
 
void PostProcessingShaderDesaturationImplementation::initialize()
{
    auto shaderVersion = renderer->getShaderVersion();
 
    //  fragment shader
    fragmentShaderId = renderer->loadShader(
        renderer->SHADER_FRAGMENT_SHADER,
        "shader/" + shaderVersion + "/postprocessing",
        "desaturation_fragmentshader.frag",
        Engine::is4K() == true?"#define HAVE_4K":""
    );
    if (fragmentShaderId == 0) return;
 
    //  vertex shader
    vertexShaderId = renderer->loadShader(
        renderer->SHADER_VERTEX_SHADER,
        "shader/" + shaderVersion + "/postprocessing",
        "desaturation_vertexshader.vert"
    );
    if (vertexShaderId == 0) return;
 
    // create, attach and link program
    programId = renderer->createProgram(renderer->PROGRAM_OBJECTS);
    renderer->attachShaderToProgram(programId, vertexShaderId);
    renderer->attachShaderToProgram(programId, fragmentShaderId);
 
    //
    PostProcessingShaderBaseImplementation::initialize();
 
    //
    if (initialized == false) return;
 
    // uniforms
    uniformIntensity = renderer->getProgramUniformLocation(programId, "intensity");
 
    // register shader
    Engine::registerShader(
        Engine::ShaderType::SHADERTYPE_POSTPROCESSING,
        "desaturation",
        {{ "intensity", ShaderParameter(0.0f) }}
    );
}
 
void PostProcessingShaderDesaturationImplementation::setShaderParameters(int contextIdx, Engine* engine) {
    if (uniformIntensity != -1) renderer->setProgramUniformFloat(contextIdx, uniformIntensity, engine->getShaderParameter("desaturation", "intensity").getFloatValue());
}