TGUI  1.0-alpha
BackendRenderTargetOpenGL3.hpp
1
2//
3// TGUI - Texus' Graphical User Interface
4// Copyright (C) 2012-2022 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/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
85 void drawGui(const std::shared_ptr<RootContainer>& root) override;
86
87
98 void drawVertexArray(const RenderStates& states, const Vertex* vertices, std::size_t vertexCount,
99 const int* indices, std::size_t indexCount, const std::shared_ptr<BackendTexture>& texture) override;
100
101
103 protected:
104
105
114 void updateClipping(FloatRect clipRect, FloatRect clipViewport) override;
115
116
118 // Creates the vertex and index buffers
120 void createBuffers();
121
122
124 protected:
125
126 unsigned int m_shaderProgram = 0;
127 unsigned int m_vertexArray = 0;
128 unsigned int m_vertexBuffer = 0;
129 unsigned int m_indexBuffer = 0;
130 std::size_t m_vertexBufferSize = 0;
131 std::size_t m_indexBufferSize = 0;
132
133 std::unique_ptr<BackendTextureOpenGL3> m_emptyTexture;
134 std::shared_ptr<BackendTextureOpenGL3> m_currentTexture;
135
136 Transform m_projectionTransform;
137 int m_projectionMatrixShaderUniformLocation = 0;
138 };
139}
140
142
143#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. 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.
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