TGUI  0.10-dev
BackendRenderTargetOpenGL3.hpp
1
2//
3// TGUI - Texus' Graphical User Interface
4// Copyright (C) 2012-2021 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.
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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/BackendRenderTarget.hpp>
30#include <TGUI/Backend/Renderer/OpenGL3/BackendTextureOpenGL3.hpp>
31
33
34namespace tgui
35{
40 {
41 public:
42
47
48
53
54
59 void setClearColor(const Color& color) override;
60
61
65 void clearScreen() override;
66
67
75 void setView(FloatRect view, FloatRect viewport, Vector2f targetSize) override;
76
77
83 void drawGui(const std::shared_ptr<RootContainer>& root) override;
84
85
96 void drawVertexArray(const RenderStates& states, const Vertex* vertices, std::size_t vertexCount,
97 const int* indices, std::size_t indexCount, const std::shared_ptr<BackendTexture>& texture) override;
98
99
101 protected:
102
103
112 void updateClipping(FloatRect clipRect, FloatRect clipViewport) override;
113
114
116 // Creates the vertex and index buffers
118 void createBuffers();
119
120
122 protected:
123
124 unsigned int m_shaderProgram = 0;
125 unsigned int m_vertexArray = 0;
126 unsigned int m_vertexBuffer = 0;
127 unsigned int m_indexBuffer = 0;
128 std::size_t m_vertexBufferSize = 0;
129 std::size_t m_indexBufferSize = 0;
130
131 std::unique_ptr<BackendTextureOpenGL3> m_emptyTexture;
132 std::shared_ptr<BackendTextureOpenGL3> m_currentTexture;
133
134 Transform m_projectionTransform;
135 int m_projectionMatrixShaderUniformLocation = 0;
136 };
137}
138
140
141#endif // TGUI_BACKEND_RENDER_TARGET_OPENGL3_HPP
Render target implementation that makes use of modern OpenGL.
Definition: BackendRenderTargetOpenGL3.hpp:40
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 drawVertexArray(const RenderStates &states, const Vertex *vertices, std::size_t vertexCount, const 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.
void setClearColor(const Color &color) override
Select the color that will be used by clearScreen.
void clearScreen() override
Clears the screen, called at the beginning of each frame when gui.mainLoop() is called.
Base class for render targets.
Definition: BackendRenderTarget.hpp:48
Wrapper for colors.
Definition: Color.hpp:63
Defines a transform matrix.
Definition: Transform.hpp:43
Namespace that contains all TGUI functions and classes.
Definition: AbsoluteOrRelativeValue.hpp:36
States used for drawing.
Definition: RenderStates.hpp:39
Definition: Vertex.hpp:37