supercell-wx/scwx-qt/source/scwx/qt/gl/text_shader.hpp

#pragma once

#include <scwx/qt/gl/shader_program.hpp>
#include <scwx/qt/util/font.hpp>

#include <memory>

#include <boost/gil.hpp>
#include <glm/glm.hpp>

namespace scwx
{
namespace qt
{
namespace gl
{

enum class TextAlign
{
   Left,
   Center,
   Right
};

class TextShaderImpl;

class TextShader : public ShaderProgram
{
public:
   explicit TextShader(OpenGLFunctions& gl);
   ~TextShader();

   TextShader(const TextShader&) = delete;
   TextShader& operator=(const TextShader&) = delete;

   TextShader(TextShader&&) noexcept;
   TextShader& operator=(TextShader&&) noexcept;

   bool Initialize();
   void RenderText(const std::string&               text,
                   float                            x,
                   float                            y,
                   float                            scale,
                   const glm::mat4&                 projection,
                   const boost::gil::rgba8_pixel_t& color,
                   std::shared_ptr<util::Font>      font,
                   GLuint                           textureId,
                   TextAlign                        align = TextAlign::Left);
   void SetProjection(const glm::mat4& projection);

private:
   std::unique_ptr<TextShaderImpl> p;
};

} // namespace gl
} // namespace qt
} // namespace scwx