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326 lines
9.1 KiB
326 lines
9.1 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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#if OPENGL_ES==2
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#include "painterogl2.h"
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#elif OPENGL_ES==1
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#include "painterogl1.h"
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#else
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#include "painterogl1.h"
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#include "painterogl2.h"
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#endif
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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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Graphics::Graphics()
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{
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m_maxTextureSize = -1;
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m_selectedPainterEngine = Painter_Any;
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}
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void Graphics::init()
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{
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logInfo("GPU ", glGetString(GL_RENDERER));
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logInfo("OpenGL ", glGetString(GL_VERSION));
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#if OPENGL_ES==2
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g_painterOGL2 = new PainterOGL2;
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#elif OPENGL_ES==1
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g_painterOGL1 = new PainterOGL1;
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#else
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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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// overwrite framebuffer API if needed
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if(GLEW_EXT_framebuffer_object && !GLEW_ARB_framebuffer_object) {
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glGenFramebuffers = glGenFramebuffersEXT;
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glDeleteFramebuffers = glDeleteFramebuffersEXT;
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glBindFramebuffer = glBindFramebufferEXT;
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glFramebufferTexture2D = glFramebufferTexture2DEXT;
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glCheckFramebufferStatus = glCheckFramebufferStatusEXT;
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glGenerateMipmap = glGenerateMipmapEXT;
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}
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// opengl 1 is always supported
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g_painterOGL1 = new PainterOGL1;
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// opengl 2 is only supported in newer hardware
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if(GLEW_VERSION_2_0)
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g_painterOGL2 = new PainterOGL2;
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#endif
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// determine max texture size
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static GLint maxTextureSize = -1;
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if(maxTextureSize == -1)
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glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
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if(m_maxTextureSize == -1 || m_maxTextureSize > maxTextureSize)
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m_maxTextureSize = maxTextureSize;
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selectPainterEngine(m_prefferedPainterEngine);
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m_emptyTexture = TexturePtr(new Texture);
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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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#ifdef PAINTER_OGL2
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if(g_painterOGL2) {
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delete g_painterOGL2;
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g_painterOGL2 = nullptr;
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}
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#endif
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#ifdef PAINTER_OGL1
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if(g_painterOGL1) {
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delete g_painterOGL1;
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g_painterOGL1 = nullptr;
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}
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#endif
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g_painter = nullptr;
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m_emptyTexture.reset();
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}
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bool Graphics::parseOption(const std::string& option)
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{
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if(option == "-no-draw-arrays")
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m_useDrawArrays = false;
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else if(option == "-no-fbos")
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m_useFBO = false;
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else if(option == "-no-mipmaps")
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m_useMipmaps = false;
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else if(option == "-no-hardware-mipmaps")
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m_useHardwareMipmaps = false;
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else if(option == "-no-smooth")
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m_useBilinearFiltering = false;
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else if(option == "-no-hardware-buffers")
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m_useHardwareBuffers = false;
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else if(option == "-no-non-power-of-two-textures")
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m_useNonPowerOfTwoTextures = false;
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else if(option == "-no-clamp-to-edge")
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m_useClampToEdge = false;
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else if(option == "-opengl1")
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m_prefferedPainterEngine = Painter_OpenGL1;
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else if(option == "-opengl2")
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m_prefferedPainterEngine = Painter_OpenGL2;
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else
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return false;
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return true;
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}
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bool Graphics::selectPainterEngine(PainterEngine painterEngine)
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{
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bool found = false;
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#ifdef PAINTER_OGL2
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// always prefer OpenGL 2 over OpenGL 1
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if(!found && g_painterOGL2 && (painterEngine == Painter_OpenGL2 || painterEngine == Painter_Any)) {
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m_selectedPainterEngine = Painter_OpenGL2;
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g_painter = g_painterOGL2;
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found = true;
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}
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#endif
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#ifdef PAINTER_OGL1
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// fallback to OpenGL 1 in older hardwares
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if(!found && g_painterOGL1 && (painterEngine == Painter_OpenGL1 || painterEngine == Painter_Any)) {
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m_selectedPainterEngine = Painter_OpenGL1;
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g_painter = g_painterOGL1;
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found = true;
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}
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#endif
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if(!found)
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logFatal("Neither OpenGL 1.0 nor OpenGL 2.0 painter engine is supported by your platform, "
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"try updating your graphics drivers or your hardware and then run again.");
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// switch painters GL state
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if(g_painter)
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g_painter->unbind();
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g_painter->bind();
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if(painterEngine == Painter_Any)
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return true;
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return getPainterEngine() == painterEngine;
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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
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// Painter Coord ------------------------------------------------ GL Coord
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// ------------- | 2.0 / width | 0.0 | 0.0 | ---------------
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// | x y 1 | * | 0.0 | -2.0 / height | 0.0 | = | x' y' 1 |
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// ------------- | -1.0 | 1.0 | 1.0 | ---------------
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// ------------------------------------------------
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Matrix3 projectionMatrix = { 2.0f/size.width(), 0.0f, 0.0f,
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0.0f, -2.0f/size.height(), 0.0f,
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-1.0f, 1.0f, 1.0f };
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#ifdef PAINTER_OGL1
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if(g_painterOGL1)
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g_painterOGL1->setProjectionMatrix(projectionMatrix);
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#endif
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#ifdef PAINTER_OGL2
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if(g_painterOGL2)
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g_painterOGL2->setProjectionMatrix(projectionMatrix);
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#endif
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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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bool Graphics::canUseDrawArrays()
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{
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#ifdef OPENGL_ES
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return true;
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#else
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// glDrawArrays is supported by OpenGL 1.1
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if(!GLEW_VERSION_1_1)
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return false;
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return m_useDrawArrays;
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#endif
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}
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bool Graphics::canUseShaders()
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{
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#if OPENGL_ES==2
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return true;
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#elif OPENGL_ES==1
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return false;
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#else
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// fragment and vertex programs are supported by OpenGL 2.0
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if(GLEW_ARB_vertex_program && GLEW_ARB_vertex_shader && GLEW_ARB_fragment_shader)
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return true;
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return false;
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#endif
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}
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bool Graphics::canUseFBO()
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{
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#if OPENGL_ES==2
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return m_useFBO;
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#elif OPENGL_ES==1
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return false;
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#else
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// FBOs are supported by OpenGL 3.0
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// or by OpenGL 2.0 with EXT_framebuffer_object (most of the OpenGL 2.0 implementations have this extension)
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if(!GLEW_ARB_framebuffer_object || !GLEW_EXT_framebuffer_object)
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return false;
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return m_useFBO;
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#endif
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}
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bool Graphics::canUseBilinearFiltering()
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{
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// bilinear filtering is supported by any OpenGL implementation
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return m_useBilinearFiltering;
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}
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bool Graphics::canUseHardwareBuffers()
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{
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#ifndef OPENGL_ES
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// vertex buffer objects is supported by OpenGL 1.5
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if(!GLEW_ARB_vertex_buffer_object)
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return false;
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#endif
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return m_useHardwareBuffers;
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}
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bool Graphics::canUseNonPowerOfTwoTextures()
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{
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#if OPENGL_ES==2
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return m_useNonPowerOfTwoTextures;
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#elif OPENGL_ES==1
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return false;
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#else
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// power of two textures is supported by OpenGL 2.0
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if(!GLEW_ARB_texture_non_power_of_two)
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return false;
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return m_useNonPowerOfTwoTextures;
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#endif
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}
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bool Graphics::canUseMipmaps()
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{
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// mipmaps is supported by any OpenGL implementation
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return m_useMipmaps;
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}
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bool Graphics::canUseHardwareMipmaps()
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{
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#if OPENGL_ES==2
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return m_useHardwareMipmaps;
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#elif OPENGL_ES==1
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return false;
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#else
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// glGenerateMipmap is supported when FBOs are
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if(!GLEW_ARB_framebuffer_object || !GLEW_EXT_framebuffer_object)
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return false;
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return m_useHardwareMipmaps;
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#endif
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}
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bool Graphics::canUseClampToEdge()
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{
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#ifdef OPENGL_ES
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return m_useClampToEdge;
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#else
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// GL_CLAMP_TO_EDGE is present in OpenGL 1.2
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if(!GLEW_VERSION_1_2)
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return false;
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return m_useClampToEdge;
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#endif
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}
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