BackendRenderTargetOpenGL3.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2023 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
 
#ifndef TGUI_BACKEND_RENDER_TARGET_OPENGL3_HPP
#define TGUI_BACKEND_RENDER_TARGET_OPENGL3_HPP
 
#include <TGUI/Backend/Renderer/OpenGL3/BackendTextureOpenGL3.hpp>
 
#if TGUI_BUILD_AS_CXX_MODULE
 import tgui;
#else
 #include <TGUI/Backend/Renderer/BackendRenderTarget.hpp>
#endif
 
 
TGUI_MODULE_EXPORT namespace tgui
{
 class TGUI_API BackendRenderTargetOpenGL3 : public BackendRenderTarget
 {
 public:
 
 BackendRenderTargetOpenGL3();
 
 
 ~BackendRenderTargetOpenGL3() override;
 
 
 void setClearColor(const Color& color) override;
 
 
 void clearScreen() override;
 
 
 void setView(FloatRect view, FloatRect viewport, Vector2f targetSize) override;
 
 
 void drawGui(const std::shared_ptr<RootContainer>& root) override;
 
 
 void drawVertexArray(const RenderStates& states, const Vertex* vertices, std::size_t vertexCount,
 const unsigned int* indices, std::size_t indexCount, const std::shared_ptr<BackendTexture>& texture) override;
 
 
 protected:
 
 
 void updateClipping(FloatRect clipRect, FloatRect clipViewport) override;
 
 
 // Creates the vertex and index buffers
 void createBuffers();
 
 
 protected:
 
 unsigned int m_shaderProgram = 0;
 unsigned int m_vertexArray = 0;
 unsigned int m_vertexBuffer = 0;
 unsigned int m_indexBuffer = 0;
 std::size_t m_vertexBufferSize = 0;
 std::size_t m_indexBufferSize = 0;
 
 std::unique_ptr<BackendTextureOpenGL3> m_emptyTexture;
 std::shared_ptr<BackendTextureOpenGL3> m_currentTexture;
 
 Transform m_projectionTransform;
 int m_projectionMatrixShaderUniformLocation = 0;
 };
}
 
 
#endif // TGUI_BACKEND_RENDER_TARGET_OPENGL3_HPP