GUIShader.cpp

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#include <tdme/gui/renderer/GUIShader.h>
 
#include <array>
 
#include <tdme/tdme.h>
#include <tdme/engine/subsystems/renderer/Renderer.h>
 
#include <tdme/gui/nodes/GUIColor.h>
#include <tdme/math/Math.h>
#include <tdme/math/Matrix2D3x3.h>
#include <tdme/utilities/Console.h>
 
using tdme::gui::renderer::GUIShader;
 
using std::array;
 
using tdme::engine::subsystems::renderer::Renderer;
using tdme::gui::nodes::GUIColor;
using tdme::math::Math;
using tdme::math::Matrix2D3x3;
using tdme::utilities::Console;
 
GUIShader::GUIShader(Renderer* renderer)
{
    this->renderer = renderer;
    initialized = false;
    isRunning = false;
}
 
bool GUIShader::isInitialized()
{
    return initialized;
}
 
void GUIShader::initialize()
{
    auto shaderVersion = renderer->getShaderVersion();
    vertexShaderId = renderer->loadShader(
        renderer->SHADER_VERTEX_SHADER,
        "shader/" + shaderVersion + "/gui",
        "render_vertexshader.vert"
    );
    if (vertexShaderId == 0) return;
 
    fragmentShaderId = renderer->loadShader(
        renderer->SHADER_FRAGMENT_SHADER,
        "shader/" + shaderVersion + "/gui",
        "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");
        renderer->setProgramAttributeLocation(programId, 3, "inColor");
    }
    if (renderer->linkProgram(programId) == false) return;
 
    uniformDiffuseTextureUnit = renderer->getProgramUniformLocation(programId, "diffuseTextureUnit");
    if (uniformDiffuseTextureUnit == -1) return;
 
    uniformDiffuseTextureAvailable = renderer->getProgramUniformLocation(programId, "diffuseTextureAvailable");
    if (uniformDiffuseTextureAvailable == -1) return;
 
    uniformMaskTextureUnit = renderer->getProgramUniformLocation(programId, "maskTextureUnit");
    if (uniformMaskTextureUnit == -1) return;
 
    uniformMaskTextureAvailable = renderer->getProgramUniformLocation(programId, "maskTextureAvailable");
    if (uniformMaskTextureAvailable == -1) return;
 
    uniformMaskMaxValue = renderer->getProgramUniformLocation(programId, "maskMaxValue");
    if (uniformMaskMaxValue == -1) return;
 
    uniformEffectColorMul = renderer->getProgramUniformLocation(programId, "effectColorMul");
    if (uniformEffectColorMul == -1) return;
 
    uniformEffectColorAdd = renderer->getProgramUniformLocation(programId, "effectColorAdd");
    if (uniformEffectColorAdd == -1) return;
 
    // texture matrix
    uniformTextureMatrix = renderer->getProgramUniformLocation(programId, "textureMatrix");
    if (uniformTextureMatrix == -1) return;
 
    // gradients
    uniformGradientAvailable = renderer->getProgramUniformLocation(programId, "gradientAvailable");
    if (uniformGradientAvailable == -1) return;
    for (auto i = 0; i < uniformGradientColors.size(); i++) {
        uniformGradientColors[i] = renderer->getProgramUniformLocation(programId, "gradientColors[" + to_string(i) + "]");
        if (uniformGradientColors[i] == -1) return;
    }
    uniformGradientColorCount = renderer->getProgramUniformLocation(programId, "gradientColorCount");
    if (uniformGradientColorCount == -1) return;
    for (auto i = 0; i < uniformGradientColorStarts.size(); i++) {
        uniformGradientColorStarts[i] = renderer->getProgramUniformLocation(programId, "gradientColorStarts[" + to_string(i) + "]");
        if (uniformGradientColorStarts[i] == -1) return;
    }
    uniformInverseGradientTextureMatrix = renderer->getProgramUniformLocation(programId, "inverseGradientTextureMatrix");
    if (uniformInverseGradientTextureMatrix == -1) return;
 
    //
    initialized = true;
}
 
void GUIShader::useProgram()
{
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
    renderer->useProgram(contextIdx, programId);
    renderer->setLighting(contextIdx, renderer->LIGHTING_NONE);
    renderer->setProgramUniformInteger(contextIdx, uniformDiffuseTextureUnit, 0);
    renderer->setProgramUniformInteger(contextIdx, uniformMaskTextureUnit, 1);
    renderer->setProgramUniformInteger(contextIdx, uniformMaskTextureAvailable, 0);
    renderer->setProgramUniformFloat(contextIdx, uniformMaskMaxValue, 1.0);
    renderer->setProgramUniformInteger(contextIdx, uniformGradientAvailable, 0);
    isRunning = true;
}
 
void GUIShader::unUseProgram()
{
    isRunning = false;
}
 
void GUIShader::bindTexture(int32_t textureId)
{
    if (isRunning == false) return;
    switch(renderer->getTextureUnit(renderer->CONTEXTINDEX_DEFAULT)) {
        case 0:
            renderer->setProgramUniformInteger(renderer->CONTEXTINDEX_DEFAULT, uniformDiffuseTextureAvailable, textureId == 0 ? 0 : 1);
            break;
        case 1:
            renderer->setProgramUniformFloat(renderer->CONTEXTINDEX_DEFAULT, uniformMaskMaxValue, renderer->getMaskMaxValue(renderer->CONTEXTINDEX_DEFAULT));
            renderer->setProgramUniformInteger(renderer->CONTEXTINDEX_DEFAULT, uniformMaskTextureAvailable, textureId == 0 ? 0 : 1);
            break;
    }
}
 
void GUIShader::updateEffect()
{
    if (isRunning == false) return;
 
    // use default context
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
 
    //
    renderer->setProgramUniformFloatVec4(contextIdx, uniformEffectColorMul, renderer->getEffectColorMul(contextIdx));
    renderer->setProgramUniformFloatVec4(contextIdx, uniformEffectColorAdd, renderer->getEffectColorAdd(contextIdx));
}
 
 
void GUIShader::updateTextureMatrix() {
    if (isRunning == false) return;
 
    // use default context
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
 
    //
    renderer->setProgramUniformFloatMatrix3x3(contextIdx, uniformTextureMatrix, renderer->getTextureMatrix(contextIdx).getArray());
}
 
void GUIShader::setGradient(int count, array<GUIColor, 10>& colors, array<float, 10>& colorStarts, float rotationAngle) {
    // use default context
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
 
    //
    count = Math::clamp(count, 0, 10);
    renderer->setProgramUniformInteger(contextIdx, uniformGradientAvailable, count > 0?1:0);
    if (count == 0) return;
    for (auto i = 0; i < count; i++) renderer->setProgramUniformFloatVec4(contextIdx, uniformGradientColors[i], colors[i].getArray());
    renderer->setProgramUniformInteger(contextIdx, uniformGradientColorCount, count);
    for (auto i = 0; i < count; i++) renderer->setProgramUniformFloat(contextIdx, uniformGradientColorStarts[i], colorStarts[i]);
    renderer->setProgramUniformFloatMatrix3x3(contextIdx, uniformInverseGradientTextureMatrix, Matrix2D3x3::rotateAroundTextureCenter(-rotationAngle).getArray());
}
 
void GUIShader::unsetGradient() {
    // use default context
    auto contextIdx = renderer->CONTEXTINDEX_DEFAULT;
 
    //
    renderer->setProgramUniformInteger(contextIdx, uniformGradientAvailable, 0);
}