TGUI 1.11
Loading...
Searching...
No Matches
BackendRenderTargetGLES2.hpp
1
2//
3// TGUI - Texus' Graphical User Interface
4// Copyright (C) 2012-2025 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#ifndef TGUI_BACKEND_RENDER_TARGET_GLES2_HPP
26#define TGUI_BACKEND_RENDER_TARGET_GLES2_HPP
27
28#include <TGUI/Backend/Renderer/GLES2/BackendTextureGLES2.hpp>
29#include <TGUI/Backend/Renderer/BackendRenderTarget.hpp>
30
32
33namespace tgui
34{
38 class TGUI_API BackendRenderTargetGLES2 : public BackendRenderTarget
39 {
40 public:
41
46
51
56 void setClearColor(const Color& color) override;
57
61 void clearScreen() override;
62
70 void setView(FloatRect view, FloatRect viewport, Vector2f targetSize) override;
71
79 void drawGui(const std::shared_ptr<RootContainer>& root) override;
80
91 void drawVertexArray(const RenderStates& states, const Vertex* vertices, std::size_t vertexCount,
92 const unsigned int* indices, std::size_t indexCount, const std::shared_ptr<BackendTexture>& texture) override;
93
95 protected:
96
105 void updateClipping(FloatRect clipRect, FloatRect clipViewport) override;
106
108 // Calls glEnableVertexAttribArray and glVertexAttribPointer.
109 // Called only once when using a VAO (GLES 3.x), but on every draw when using GLES 2.0
111 void setVertexAttribs();
112
114 // Creates the vertex and index buffers
116 void createBuffers();
117
119 protected:
120
121 unsigned int m_shaderProgram = 0;
122 unsigned int m_vertexArray = 0;
123 unsigned int m_vertexBuffer = 0;
124 unsigned int m_indexBuffer = 0;
125 std::size_t m_vertexBufferSize = 0;
126 std::size_t m_indexBufferSize = 0;
127
128 std::unique_ptr<BackendTextureGLES2> m_emptyTexture;
129 std::shared_ptr<BackendTextureGLES2> m_currentTexture;
130
131 Transform m_projectionTransform;
132 int m_projectionMatrixShaderUniformLocation = 0;
133 unsigned int m_positionShaderLocation = 0;
134 unsigned int m_colorShaderLocation = 1;
135 unsigned int m_texCoordShaderLocation = 2;
136 };
137
139}
140
142
143#endif // TGUI_BACKEND_RENDER_TARGET_GLES2_HPP
~BackendRenderTargetGLES2() 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.
void drawGui(const std::shared_ptr< RootContainer > &root) override
Draws the gui and all of its widgets.
BackendRenderTargetGLES2()
Default constructor.
void clearScreen() override
Clears the screen, called at the beginning of each frame when gui.mainLoop() is called.
void setView(FloatRect view, FloatRect viewport, Vector2f targetSize) override
Informs the render target about which part of the window is used for rendering.
void updateClipping(FloatRect clipRect, FloatRect clipViewport) override
Called from addClippingLayer and removeClippingLayer to apply the clipping.
void setClearColor(const Color &color) override
Select the color that will be used by clearScreen.
Wrapper for colors.
Definition Color.hpp:71
Defines a transform matrix.
Definition Transform.hpp:44
Namespace that contains all TGUI functions and classes.
Definition AbsoluteOrRelativeValue.hpp:36
States used for drawing.
Definition RenderStates.hpp:38
Definition Vertex.hpp:37