TGUI  1.1
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BackendRenderTargetOpenGL3.hpp
1
2//
3// TGUI - Texus' Graphical User Interface
4// Copyright (C) 2012-2023 Bruno Van de Velde (vdv_b@tgui.eu)
5//
6// This software is provided 'as-is', without any express or implied warranty.
7// In no event will the authors be held liable for any damages arising from the use of this software.
8//
9// Permission is granted to anyone to use this software for any purpose,
10// including commercial applications, and to alter it and redistribute it freely,
11// subject to the following restrictions:
12//
13// 1. The origin of this software must not be misrepresented;
14// you must not claim that you wrote the original software.
15// If you use this software in a product, an acknowledgment
16// in the product documentation would be appreciated but is not required.
17//
18// 2. Altered source versions must be plainly marked as such,
19// and must not be misrepresented as being the original software.
20//
21// 3. This notice may not be removed or altered from any source distribution.
22//
24
25
26#ifndef TGUI_BACKEND_RENDER_TARGET_OPENGL3_HPP
27#define TGUI_BACKEND_RENDER_TARGET_OPENGL3_HPP
28
29#include <TGUI/Backend/Renderer/OpenGL3/BackendTextureOpenGL3.hpp>
30
31#if TGUI_BUILD_AS_CXX_MODULE
32 import tgui;
33#else
34 #include <TGUI/Backend/Renderer/BackendRenderTarget.hpp>
35#endif
36
38
39TGUI_MODULE_EXPORT namespace tgui
40{
45 {
46 public:
47
52
53
58
59
64 void setClearColor(const Color& color) override;
65
66
70 void clearScreen() override;
71
72
80 void setView(FloatRect view, FloatRect viewport, Vector2f targetSize) override;
81
82
90 void drawGui(const std::shared_ptr<RootContainer>& root) override;
91
92
103 void drawVertexArray(const RenderStates& states, const Vertex* vertices, std::size_t vertexCount,
104 const unsigned int* indices, std::size_t indexCount, const std::shared_ptr<BackendTexture>& texture) override;
105
106
108 protected:
109
110
119 void updateClipping(FloatRect clipRect, FloatRect clipViewport) override;
120
121
123 // Creates the vertex and index buffers
125 void createBuffers();
126
127
129 protected:
130
131 unsigned int m_shaderProgram = 0;
132 unsigned int m_vertexArray = 0;
133 unsigned int m_vertexBuffer = 0;
134 unsigned int m_indexBuffer = 0;
135 std::size_t m_vertexBufferSize = 0;
136 std::size_t m_indexBufferSize = 0;
137
138 std::unique_ptr<BackendTextureOpenGL3> m_emptyTexture;
139 std::shared_ptr<BackendTextureOpenGL3> m_currentTexture;
140
141 Transform m_projectionTransform;
142 int m_projectionMatrixShaderUniformLocation = 0;
143 };
144}
145
147
148#endif // TGUI_BACKEND_RENDER_TARGET_OPENGL3_HPP
Render target implementation that makes use of modern OpenGL.
Definition BackendRenderTargetOpenGL3.hpp:45
void setView(FloatRect view, FloatRect viewport, Vector2f targetSize) override
Informs the render target about which part of the window is used for rendering.
BackendRenderTargetOpenGL3()
Default constructor.
void updateClipping(FloatRect clipRect, FloatRect clipViewport) override
Called from addClippingLayer and removeClippingLayer to apply the clipping.
void drawGui(const std::shared_ptr< RootContainer > &root) override
Draws the gui and all of its widgets.
void setClearColor(const Color &color) override
Select the color that will be used by clearScreen. This will be called when gui.mainLoop() is called.
void clearScreen() override
Clears the screen, called at the beginning of each frame when gui.mainLoop() is called.
~BackendRenderTargetOpenGL3() override
Destructor.
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
Draws a vertex array. This is called by the other draw functions.
Base class for render targets.
Definition BackendRenderTarget.hpp:48
Wrapper for colors.
Definition Color.hpp:72
Defines a transform matrix.
Definition Transform.hpp:47
Namespace that contains all TGUI functions and classes.
Definition AbsoluteOrRelativeValue.hpp:39
States used for drawing.
Definition RenderStates.hpp:39
Definition Vertex.hpp:40