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109 lines
3.8 KiB
109 lines
3.8 KiB
/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "fontmanager.h"
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#include <framework/graphics/graphics.h>
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#include <framework/graphics/texture.h>
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#include <framework/platform/platformwindow.h>
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Graphics g_graphics;
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void Graphics::init()
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{
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#ifndef OPENGL_ES2
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// init GL extensions
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GLenum err = glewInit();
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if(err != GLEW_OK)
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logFatal("Unable to init GLEW: ", glewGetErrorString(err));
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if(!GLEW_ARB_vertex_program || !GLEW_ARB_vertex_shader ||
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!GLEW_ARB_fragment_program || !GLEW_ARB_fragment_shader ||
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!GLEW_ARB_framebuffer_object ||
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!GLEW_ARB_multitexture)
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logFatal("Your video driver is not supported");
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#endif
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glEnable(GL_BLEND);
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logInfo("GPU ", glGetString(GL_RENDERER));
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logInfo("OpenGL ", glGetString(GL_VERSION));
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m_emptyTexture = TexturePtr(new Texture);
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g_painter.init();
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}
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void Graphics::terminate()
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{
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g_fonts.releaseFonts();
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g_painter.terminate();
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m_emptyTexture.reset();
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}
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bool Graphics::isExtensionSupported(const char *extension)
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{
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std::string extensionsString = (const char*)glGetString(GL_EXTENSIONS);
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auto extensions = Fw::split(extensionsString);
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return std::find(extensions.begin(), extensions.end(), extension) != extensions.end();
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}
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void Graphics::resize(const Size& size)
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{
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setViewportSize(size);
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// The projection matrix converts from Painter's coordinate system to GL's coordinate system
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// * GL's viewport is 2x2, Painter's is width x height
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// * GL has +y -> -y going from bottom -> top, Painter is the other way round
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// * GL has [0,0] in the center, Painter has it in the top-left
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//
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// This results in the Projection matrix below.
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//
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// Projection Matrix Painter Coord GL Coord
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// ------------------------------------------------ --------- ---------
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// | 2.0 / width | 0.0 | -1.0 | | x | | x' |
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// | 0.0 | -2.0 / height | 1.0 | * | y | = | y' |
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// | 0.0 | 0.0 | 0.0 | | 1 | | 0 |
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// ------------------------------------------------ --------- ---------
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Matrix3 projectionMatrix = { 2.0f/size.width(), 0.0f, -1.0f,
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0.0f, -2.0f/size.height(), 1.0f,
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0.0f, 0.0f, 0.0f };
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projectionMatrix.transpose();
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g_painter.setProjectionMatrix(projectionMatrix);
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}
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void Graphics::beginRender()
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{
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glClearColor(0, 0, 0, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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}
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void Graphics::endRender()
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{
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}
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void Graphics::setViewportSize(const Size& size)
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{
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glViewport(0, 0, size.width(), size.height());
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m_viewportSize = size;
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}
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