Method initProgram

core/renderer/Texture2D.cpp:745–781

}

void Texture2D::initProgram()
{
    if (_programState != nullptr)
        return;

    auto& pipelineDescriptor = _customCommand.getPipelineDescriptor();
    // create program state
    auto* program      = backend::Program::getBuiltinProgram(backend::ProgramType::POSITION_TEXTURE);
    _programState      = new ax::backend::ProgramState(program);
    _mvpMatrixLocation = _programState->getUniformLocation("u_MVPMatrix");
    _textureLocation   = _programState->getUniformLocation("u_tex0");

    pipelineDescriptor.programState = _programState;

    // create vertex buffer
    _customCommand.setDrawType(CustomCommand::DrawType::ARRAY);
    _customCommand.setPrimitiveType(CustomCommand::PrimitiveType::TRIANGLE_STRIP);
    _customCommand.createVertexBuffer(4 * sizeof(float), 4, CustomCommand::BufferUsage::DYNAMIC);

    // setup blend state
    BlendFunc blendFunc;
    if (hasPremultipliedAlpha())
    {
        blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;
    }
    else
    {
        blendFunc = BlendFunc::ALPHA_NON_PREMULTIPLIED;
    }

    auto& blendDescriptor                = pipelineDescriptor.blendDescriptor;
    blendDescriptor.blendEnabled         = true;
    blendDescriptor.sourceRGBBlendFactor = blendDescriptor.sourceAlphaBlendFactor = blendFunc.src;
    blendDescriptor.destinationRGBBlendFactor = blendDescriptor.destinationAlphaBlendFactor = blendFunc.dst;

    _programState->setTexture(_textureLocation, 0, _texture);
}

void Texture2D::drawAtPoint(const Vec2& point, float globalZOrder)
{