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- /* libsegl - Sebas Extended GL Library
- * Collection of Opengl/3D-Math helpers
- *
- * Copyright (c) 2008 by Sebastian Lohff, seba@seba-geek.de
- * http://www.seba-geek.de
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
- #include "glsdlscreen.h"
-
- namespace segl {
-
- GLSDLScreen::GLSDLScreen() {
- width = 0;
- height = 1;
- bpp = 16;
- znear = 1.0f;
- zfar = 100.0f;
-
- opengl = false;
- glsetup = true;
- resizable = false;
- fullscreen = false;
-
- extraglparam = 0;
- }
-
-
- int GLSDLScreen::getFlags() {
- const SDL_VideoInfo *videoInfo = SDL_GetVideoInfo();
- int videoflags = 0;
- if(videoInfo->hw_available)
- videoflags |= SDL_HWSURFACE;
- else
- videoflags |= SDL_SWSURFACE;
- if(videoInfo->blit_hw)
- videoflags |= SDL_HWACCEL;
-
- if(opengl) {
- videoflags |= SDL_OPENGL;
- videoflags |= SDL_GL_DOUBLEBUFFER;
- videoflags |= SDL_HWPALETTE;
- }
-
- if(fullscreen)
- videoflags |= SDL_FULLSCREEN;
-
- return videoflags;
- }
- void GLSDLScreen::enableOpenGL(bool w) {
- opengl = w;
- }
-
- void GLSDLScreen::enableResizable(bool w) {
- resizable = w;
- }
-
- void GLSDLScreen::enableFullscreen(bool w) {
- fullscreen = w;
- }
-
- void GLSDLScreen::setGLNearFar(float _znear, float _zfar) {
- znear = _znear;
- zfar = _zfar;
- }
-
- void GLSDLScreen::enableGLSetup(bool w) {
- glsetup = w;
- }
-
- void GLSDLScreen::setExtraGLParamFunc(void (*extrafunc)()) {
- extraglparam = extrafunc;
- }
-
- void GLSDLScreen::setVideoMode(int _width, int _height, int _bpp) {
- width = _width;
- height = _height;
- bpp = _bpp;
-
- if(height==0)
- height = 1;
- }
-
- void GLSDLScreen::getVideoRes(std::string vidstr, int *_w, int *_h) {
- if(_w)
- *_w = atoi(vidstr.substr(0, vidstr.find("x")).c_str());
- if(_h)
- *_h = atoi(vidstr.substr(vidstr.find("x")+1, (vidstr.length()-vidstr.find("x")-1)).c_str());
- }
-
- bool GLSDLScreen::isOK() {
- return SDL_VideoModeOK(width, height, bpp, getFlags());
- }
-
- bool GLSDLScreen::apply() {
- if(!SDL_WasInit(SDL_INIT_VIDEO)) {
- if(SDL_Init(SDL_INIT_VIDEO)==-1) {
- std::cerr << "Konnte SDL_VIDEO nicht initialisieren" << std::endl;
- return false;
- }
- }
-
- screen = SDL_SetVideoMode(width, height, bpp, getFlags());
-
- if(!screen) {
- return false;
- }
-
- if(opengl) {
- SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
-
-
- // Setup GL
- if(glsetup) {
- glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
- glClearDepth(1.0f);
- glDepthFunc(GL_LEQUAL);
- glShadeModel(GL_SMOOTH);
- glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
- glEnable(GL_ALPHA_TEST);
- glAlphaFunc(GL_GREATER, 0.1);
- glEnable(GL_DEPTH_TEST);
- }
-
- // Projection
- glViewport(0, 0, (GLsizei)width, (GLsizei)height);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(45.0f, (GLfloat)width/(GLfloat)height, znear, zfar);
-
- if(extraglparam) {
- extraglparam();
- }
-
-
-
- // Texturen neuladen, eigentlich nur f�r Windows. Aber egal.
- GLTexture::reloadAll();
- glMatrixMode(GL_TEXTURE);
- glLoadIdentity();
-
- glMatrixMode(GL_MODELVIEW);
- }
-
- return true;
- }
-
- int GLSDLScreen::getWidth() {
- return width;
- }
-
- int GLSDLScreen::getHeight() {
- return height;
- }
-
- void GLSDLScreen::clearScreen() {
- glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glLoadIdentity();
- }
-
- void GLSDLScreen::renderScreen() {
- SDL_GL_SwapBuffers();
- }
-
- } // namespace segl
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