177 lines
4.4 KiB
C++
177 lines
4.4 KiB
C++
// ==============================================================
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// This file is part of Glest Shared Library (www.glest.org)
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//
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// Copyright (C) 2001-2008 Martiño Figueroa
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//
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// You can redistribute this code and/or modify it under
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// the terms of the GNU General Public License as published
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// by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version
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// ==============================================================
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#include "opengl.h"
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#include <stdexcept>
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#include "graphics_interface.h"
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#include "context_gl.h"
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#include "gl_wrap.h"
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#include <map>
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#include "util.h"
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#include "leak_dumper.h"
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using namespace Shared::Platform;
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using namespace Shared::Util;
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using namespace std;
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namespace Shared { namespace Graphics { namespace Gl {
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std::map<string,bool> cacheExtensionCheckList;
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static int vboEnabled = 0;
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// =====================================================
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// class Globals
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// =====================================================
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bool getVBOSupported() {
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if(vboEnabled == 0) {
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bool value = isGlExtensionSupported("GL_ARB_vertex_buffer_object");
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vboEnabled = (value == true ? 1 : -1);
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}
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return (vboEnabled == 1);
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}
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void setVBOSupported(bool value) {
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vboEnabled = (value == true ? 1 : -1);
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};
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void overrideGlExtensionSupport(const char *extensionName,bool value) {
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cacheExtensionCheckList[extensionName]=value;
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if(SystemFlags::VERBOSE_MODE_ENABLED) printf("OpenGL Extension [%s] supported status FORCED TO = %d\n",extensionName,cacheExtensionCheckList[extensionName]);
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}
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bool isGlExtensionSupported(const char *extensionName) {
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if(cacheExtensionCheckList.find(extensionName) != cacheExtensionCheckList.end()) {
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return cacheExtensionCheckList[extensionName];
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}
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const GLubyte *extensionStr= glGetString(GL_EXTENSIONS);
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const char *s= reinterpret_cast<const char *>(extensionStr);
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size_t len= strlen(extensionName);
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cacheExtensionCheckList[extensionName]=false;
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if(s != NULL) {
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while ((s = strstr (s, extensionName)) != NULL) {
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s+= len;
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if((*s == ' ') || (*s == '\0')) {
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cacheExtensionCheckList[extensionName] = true;
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break;
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}
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}
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}
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if(SystemFlags::VERBOSE_MODE_ENABLED) printf("OpenGL Extension [%s] supported status = %d\n",extensionName,cacheExtensionCheckList[extensionName]);
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return cacheExtensionCheckList[extensionName];
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}
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//bool isGlVersionSupported(int major, int minor, int release) {
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//
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// const char *strVersion= getGlVersion();
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//
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// //major
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// const char *majorTok= strVersion;
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// int majorSupported= atoi(majorTok);
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//
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// if(majorSupported<major) {
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// return false;
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// }
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// else if(majorSupported>major) {
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// return true;
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// }
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//
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// //minor
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// int i=0;
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// while(strVersion[i]!='.') {
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// ++i;
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// }
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// const char *minorTok= &strVersion[i]+1;
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// int minorSupported= atoi(minorTok);
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//
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// if(minorSupported<minor) {
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// return false;
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// }
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// else if(minorSupported>minor) {
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// return true;
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// }
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//
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// //release
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// ++i;
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// while(strVersion[i]!='.') {
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// ++i;
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// }
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// const char *releaseTok= &strVersion[i]+1;
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//
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// if(atoi(releaseTok) < release) {
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// return false;
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// }
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//
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// return true;
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//}
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const char *getGlVersion() {
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return reinterpret_cast<const char *>(glGetString(GL_VERSION));
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}
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const char *getGlRenderer() {
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return reinterpret_cast<const char *>(glGetString(GL_RENDERER));
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}
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const char *getGlVendor() {
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return reinterpret_cast<const char *>(glGetString(GL_VENDOR));
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}
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const char *getGlExtensions() {
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return reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
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}
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const char *getGlPlatformExtensions() {
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Context *c= GraphicsInterface::getInstance().getCurrentContext();
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return getPlatformExtensions(static_cast<ContextGl*>(c)->getPlatformContextGl());
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}
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int getGlMaxLights() {
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int i;
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glGetIntegerv(GL_MAX_LIGHTS, (GLint*)&i);
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return i;
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}
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int getGlMaxTextureSize() {
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int i;
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glGetIntegerv(GL_MAX_TEXTURE_SIZE, (GLint*)&i);
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return i;
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}
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int getGlMaxTextureUnits() {
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int i;
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glGetIntegerv(GL_MAX_TEXTURE_UNITS, (GLint*)&i);
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return i;
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}
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int getGlModelviewMatrixStackDepth() {
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int i;
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glGetIntegerv(GL_MAX_MODELVIEW_STACK_DEPTH, (GLint*)&i);
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return i;
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}
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int getGlProjectionMatrixStackDepth() {
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int i;
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glGetIntegerv(GL_MAX_PROJECTION_STACK_DEPTH, (GLint*)&i);
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return i;
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}
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//void checkGlExtension(const char *extensionName) {
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// if(!isGlExtensionSupported(extensionName)){
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// throw megaglest_runtime_error("OpenGL extension not supported: " + string(extensionName));
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// }
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//}
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}}}// end namespace
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