534 lines
23 KiB
C++
534 lines
23 KiB
C++
// Copyright (C) 2002-2009 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#include "IrrCompileConfig.h"
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#ifdef _IRR_COMPILE_WITH_OPENGL_
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#include "COpenGLExtensionHandler.h"
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#include "irrString.h"
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#include "SMaterial.h" // for MATERIAL_MAX_TEXTURES
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#include "fast_atof.h"
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namespace irr
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{
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namespace video
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{
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COpenGLExtensionHandler::COpenGLExtensionHandler() :
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StencilBuffer(false), MultiTextureExtension(false),
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TextureCompressionExtension(false),
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MaxTextureUnits(1), MaxLights(1), MaxAnisotropy(1), MaxUserClipPlanes(0),
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MaxAuxBuffers(0), MaxIndices(65535), MaxTextureSize(1), MaxTextureLODBias(0.f),
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MaxMultipleRenderTargets(1), Version(0), ShaderLanguageVersion(0)
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#ifdef _IRR_OPENGL_USE_EXTPOINTER_
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,pGlActiveTextureARB(0), pGlClientActiveTextureARB(0),
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pGlGenProgramsARB(0), pGlBindProgramARB(0), pGlProgramStringARB(0),
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pGlDeleteProgramsARB(0), pGlProgramLocalParameter4fvARB(0),
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pGlCreateShaderObjectARB(0), pGlShaderSourceARB(0),
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pGlCompileShaderARB(0), pGlCreateProgramObjectARB(0), pGlAttachObjectARB(0),
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pGlLinkProgramARB(0), pGlUseProgramObjectARB(0), pGlDeleteObjectARB(0),
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pGlGetObjectParameterivARB(0), pGlGetUniformLocationARB(0),
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pGlUniform1ivARB(0), pGlUniform1fvARB(0), pGlUniform2fvARB(0), pGlUniform3fvARB(0), pGlUniform4fvARB(0), pGlUniformMatrix2fvARB(0),
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pGlUniformMatrix3fvARB(0), pGlUniformMatrix4fvARB(0), pGlGetActiveUniformARB(0), pGlPointParameterfARB(0), pGlPointParameterfvARB(0),
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pGlStencilFuncSeparate(0), pGlStencilOpSeparate(0),
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pGlStencilFuncSeparateATI(0), pGlStencilOpSeparateATI(0),
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pGlCompressedTexImage2D(0),
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#ifdef _IRR_USE_WINDOWS_DEVICE_
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wglSwapIntervalEXT(0),
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#elif defined(GLX_SGI_swap_control)
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glxSwapIntervalSGI(0),
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#endif
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pGlBindFramebufferEXT(0), pGlDeleteFramebuffersEXT(0), pGlGenFramebuffersEXT(0),
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pGlCheckFramebufferStatusEXT(0), pGlFramebufferTexture2DEXT(0),
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pGlBindRenderbufferEXT(0), pGlDeleteRenderbuffersEXT(0), pGlGenRenderbuffersEXT(0),
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pGlRenderbufferStorageEXT(0), pGlFramebufferRenderbufferEXT(0),
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pGlDrawBuffersARB(0), pGlDrawBuffersATI(0),
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pGlGenBuffersARB(0), pGlBindBufferARB(0), pGlBufferDataARB(0), pGlDeleteBuffersARB(0),
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pGlBufferSubDataARB(0), pGlGetBufferSubDataARB(0), pGlMapBufferARB(0), pGlUnmapBufferARB(0),
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pGlIsBufferARB(0), pGlGetBufferParameterivARB(0), pGlGetBufferPointervARB(0)
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#endif // _IRR_OPENGL_USE_EXTPOINTER_
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{
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for (u32 i=0; i<IRR_OpenGL_Feature_Count; ++i)
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FeatureAvailable[i]=false;
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}
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void COpenGLExtensionHandler::dump() const
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{
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for (u32 i=0; i<IRR_OpenGL_Feature_Count; ++i)
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os::Printer::log(OpenGLFeatureStrings[i], FeatureAvailable[i]?" true":" false");
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}
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void COpenGLExtensionHandler::initExtensions(bool stencilBuffer)
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{
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const f32 ogl_ver = core::fast_atof(reinterpret_cast<const c8*>(glGetString(GL_VERSION)));
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Version = static_cast<u16>(core::floor32(ogl_ver)*100+core::round32(core::fract(ogl_ver)*10.0f));
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if ( Version >= 102)
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os::Printer::log("OpenGL driver version is 1.2 or better.", ELL_INFORMATION);
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else
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os::Printer::log("OpenGL driver version is not 1.2 or better.", ELL_WARNING);
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{
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const char* t = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
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size_t len = 0;
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c8 *str = 0;
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if (t)
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{
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len = strlen(t);
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str = new c8[len+1];
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}
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c8* p = str;
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for (size_t i=0; i<len; ++i)
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{
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str[i] = static_cast<char>(t[i]);
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if (str[i] == ' ')
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{
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str[i] = 0;
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for (u32 j=0; j<IRR_OpenGL_Feature_Count; ++j)
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{
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if (!strcmp(OpenGLFeatureStrings[j], p))
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{
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FeatureAvailable[j] = true;
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break;
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}
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}
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p = p + strlen(p) + 1;
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}
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}
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delete [] str;
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}
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MultiTextureExtension = FeatureAvailable[IRR_ARB_multitexture];
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TextureCompressionExtension = FeatureAvailable[IRR_ARB_texture_compression];
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StencilBuffer=stencilBuffer;
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#ifdef _IRR_WINDOWS_API_
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// get multitexturing function pointers
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pGlActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC) wglGetProcAddress("glActiveTextureARB");
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pGlClientActiveTextureARB = (PFNGLCLIENTACTIVETEXTUREARBPROC) wglGetProcAddress("glClientActiveTextureARB");
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// get fragment and vertex program function pointers
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pGlGenProgramsARB = (PFNGLGENPROGRAMSARBPROC) wglGetProcAddress("glGenProgramsARB");
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pGlBindProgramARB = (PFNGLBINDPROGRAMARBPROC) wglGetProcAddress("glBindProgramARB");
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pGlProgramStringARB = (PFNGLPROGRAMSTRINGARBPROC) wglGetProcAddress("glProgramStringARB");
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pGlDeleteProgramsARB = (PFNGLDELETEPROGRAMSNVPROC) wglGetProcAddress("glDeleteProgramsARB");
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pGlProgramLocalParameter4fvARB = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC) wglGetProcAddress("glProgramLocalParameter4fvARB");
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pGlCreateShaderObjectARB = (PFNGLCREATESHADEROBJECTARBPROC) wglGetProcAddress("glCreateShaderObjectARB");
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pGlShaderSourceARB = (PFNGLSHADERSOURCEARBPROC) wglGetProcAddress("glShaderSourceARB");
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pGlCompileShaderARB = (PFNGLCOMPILESHADERARBPROC) wglGetProcAddress("glCompileShaderARB");
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pGlCreateProgramObjectARB = (PFNGLCREATEPROGRAMOBJECTARBPROC) wglGetProcAddress("glCreateProgramObjectARB");
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pGlAttachObjectARB = (PFNGLATTACHOBJECTARBPROC) wglGetProcAddress("glAttachObjectARB");
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pGlLinkProgramARB = (PFNGLLINKPROGRAMARBPROC) wglGetProcAddress("glLinkProgramARB");
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pGlUseProgramObjectARB = (PFNGLUSEPROGRAMOBJECTARBPROC) wglGetProcAddress("glUseProgramObjectARB");
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pGlDeleteObjectARB = (PFNGLDELETEOBJECTARBPROC) wglGetProcAddress("glDeleteObjectARB");
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pGlGetInfoLogARB = (PFNGLGETINFOLOGARBPROC) wglGetProcAddress("glGetInfoLogARB");
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pGlGetObjectParameterivARB = (PFNGLGETOBJECTPARAMETERIVARBPROC) wglGetProcAddress("glGetObjectParameterivARB");
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pGlGetUniformLocationARB = (PFNGLGETUNIFORMLOCATIONARBPROC) wglGetProcAddress("glGetUniformLocationARB");
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pGlUniform4fvARB = (PFNGLUNIFORM4FVARBPROC) wglGetProcAddress("glUniform4fvARB");
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pGlUniform1ivARB = (PFNGLUNIFORM1IVARBPROC) wglGetProcAddress("glUniform1ivARB");
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pGlUniform1fvARB = (PFNGLUNIFORM1FVARBPROC) wglGetProcAddress("glUniform1fvARB");
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pGlUniform2fvARB = (PFNGLUNIFORM2FVARBPROC) wglGetProcAddress("glUniform2fvARB");
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pGlUniform3fvARB = (PFNGLUNIFORM3FVARBPROC) wglGetProcAddress("glUniform3fvARB");
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pGlUniformMatrix2fvARB = (PFNGLUNIFORMMATRIX2FVARBPROC) wglGetProcAddress("glUniformMatrix2fvARB");
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pGlUniformMatrix3fvARB = (PFNGLUNIFORMMATRIX3FVARBPROC) wglGetProcAddress("glUniformMatrix3fvARB");
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pGlUniformMatrix4fvARB = (PFNGLUNIFORMMATRIX4FVARBPROC) wglGetProcAddress("glUniformMatrix4fvARB");
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pGlGetActiveUniformARB = (PFNGLGETACTIVEUNIFORMARBPROC) wglGetProcAddress("glGetActiveUniformARB");
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// get point parameter extension
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pGlPointParameterfARB = (PFNGLPOINTPARAMETERFARBPROC) wglGetProcAddress("glPointParameterfARB");
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pGlPointParameterfvARB = (PFNGLPOINTPARAMETERFVARBPROC) wglGetProcAddress("glPointParameterfvARB");
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// get stencil extension
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pGlStencilFuncSeparate = (PFNGLSTENCILFUNCSEPARATEPROC) wglGetProcAddress("glStencilFuncSeparate");
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pGlStencilOpSeparate = (PFNGLSTENCILOPSEPARATEPROC) wglGetProcAddress("glStencilOpSeparate");
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pGlStencilFuncSeparateATI = (PFNGLSTENCILFUNCSEPARATEATIPROC) wglGetProcAddress("glStencilFuncSeparateATI");
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pGlStencilOpSeparateATI = (PFNGLSTENCILOPSEPARATEATIPROC) wglGetProcAddress("glStencilOpSeparateATI");
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// compressed textures
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pGlCompressedTexImage2D = (PFNGLCOMPRESSEDTEXIMAGE2DPROC) wglGetProcAddress("glCompressedTexImage2D");
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// FrameBufferObjects
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pGlBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC) wglGetProcAddress("glBindFramebufferEXT");
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pGlDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC) wglGetProcAddress("glDeleteFramebuffersEXT");
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pGlGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC) wglGetProcAddress("glGenFramebuffersEXT");
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pGlCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) wglGetProcAddress("glCheckFramebufferStatusEXT");
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pGlFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) wglGetProcAddress("glFramebufferTexture2DEXT");
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pGlBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC) wglGetProcAddress("glBindRenderbufferEXT");
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pGlDeleteRenderbuffersEXT = (PFNGLDELETERENDERBUFFERSEXTPROC) wglGetProcAddress("glDeleteRenderbuffersEXT");
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pGlGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC) wglGetProcAddress("glGenRenderbuffersEXT");
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pGlRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC) wglGetProcAddress("glRenderbufferStorageEXT");
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pGlFramebufferRenderbufferEXT = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) wglGetProcAddress("glFramebufferRenderbufferEXT");
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pGlDrawBuffersARB = (PFNGLDRAWBUFFERSARBPROC) wglGetProcAddress("glDrawBuffersARB");
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pGlDrawBuffersATI = (PFNGLDRAWBUFFERSATIPROC) wglGetProcAddress("glDrawBuffersATI");
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// get vertex buffer extension
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pGlGenBuffersARB = (PFNGLGENBUFFERSARBPROC) wglGetProcAddress("glGenBuffersARB");
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pGlBindBufferARB = (PFNGLBINDBUFFERARBPROC) wglGetProcAddress("glBindBufferARB");
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pGlBufferDataARB = (PFNGLBUFFERDATAARBPROC) wglGetProcAddress("glBufferDataARB");
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pGlDeleteBuffersARB = (PFNGLDELETEBUFFERSARBPROC) wglGetProcAddress("glDeleteBuffersARB");
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pGlBufferSubDataARB= (PFNGLBUFFERSUBDATAARBPROC) wglGetProcAddress("glBufferSubDataARB");
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pGlGetBufferSubDataARB= (PFNGLGETBUFFERSUBDATAARBPROC)wglGetProcAddress("glGetBufferSubDataARB");
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pGlMapBufferARB= (PFNGLMAPBUFFERARBPROC) wglGetProcAddress("glMapBufferARB");
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pGlUnmapBufferARB= (PFNGLUNMAPBUFFERARBPROC) wglGetProcAddress("glUnmapBufferARB");
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pGlIsBufferARB= (PFNGLISBUFFERARBPROC) wglGetProcAddress("glIsBufferARB");
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pGlGetBufferParameterivARB= (PFNGLGETBUFFERPARAMETERIVARBPROC) wglGetProcAddress("glGetBufferParameterivARB");
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pGlGetBufferPointervARB= (PFNGLGETBUFFERPOINTERVARBPROC) wglGetProcAddress("glGetBufferPointervARB");
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// vsync extension
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wglSwapIntervalEXT = (PFNWGLSWAPINTERVALFARPROC) wglGetProcAddress("wglSwapIntervalEXT");
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#elif defined(_IRR_USE_LINUX_DEVICE_) || defined (_IRR_USE_SDL_DEVICE_)
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#ifdef _IRR_OPENGL_USE_EXTPOINTER_
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#ifdef _IRR_USE_SDL_DEVICE_
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#define IRR_OGL_LOAD_EXTENSION(x) SDL_GL_GetProcAddress(reinterpret_cast<const char*>(x))
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#else
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// Accessing the correct function is quite complex
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// All libraries should support the ARB version, however
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// since GLX 1.4 the non-ARB version is the official one
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// So we have to check the runtime environment and
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// choose the proper symbol
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// In case you still have problems please enable the
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// next line by uncommenting it
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// #define _IRR_GETPROCADDRESS_WORKAROUND_
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#ifndef _IRR_GETPROCADDRESS_WORKAROUND_
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__GLXextFuncPtr (*IRR_OGL_LOAD_EXTENSION)(const GLubyte*)=0;
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#ifdef GLX_VERSION_1_4
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int major=0,minor=0;
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if (glXGetCurrentDisplay())
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glXQueryVersion(glXGetCurrentDisplay(), &major, &minor);
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if ((major>1) || (minor>3))
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IRR_OGL_LOAD_EXTENSION=glXGetProcAddress;
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else
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#endif
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IRR_OGL_LOAD_EXTENSION=glXGetProcAddressARB;
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#else
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#define IRR_OGL_LOAD_EXTENSION glXGetProcAddressARB
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#endif
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#endif
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pGlActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glActiveTextureARB"));
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pGlClientActiveTextureARB = (PFNGLCLIENTACTIVETEXTUREARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glClientActiveTextureARB"));
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// get fragment and vertex program function pointers
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pGlGenProgramsARB = (PFNGLGENPROGRAMSARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGenProgramsARB"));
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pGlBindProgramARB = (PFNGLBINDPROGRAMARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glBindProgramARB"));
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pGlProgramStringARB = (PFNGLPROGRAMSTRINGARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glProgramStringARB"));
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pGlDeleteProgramsARB = (PFNGLDELETEPROGRAMSNVPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glDeleteProgramsARB"));
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pGlProgramLocalParameter4fvARB = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glProgramLocalParameter4fvARB"));
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pGlCreateShaderObjectARB = (PFNGLCREATESHADEROBJECTARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glCreateShaderObjectARB"));
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pGlShaderSourceARB = (PFNGLSHADERSOURCEARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glShaderSourceARB"));
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pGlCompileShaderARB = (PFNGLCOMPILESHADERARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glCompileShaderARB"));
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pGlCreateProgramObjectARB = (PFNGLCREATEPROGRAMOBJECTARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glCreateProgramObjectARB"));
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pGlAttachObjectARB = (PFNGLATTACHOBJECTARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glAttachObjectARB"));
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pGlLinkProgramARB = (PFNGLLINKPROGRAMARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glLinkProgramARB"));
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pGlUseProgramObjectARB = (PFNGLUSEPROGRAMOBJECTARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUseProgramObjectARB"));
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pGlDeleteObjectARB = (PFNGLDELETEOBJECTARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glDeleteObjectARB"));
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pGlGetInfoLogARB = (PFNGLGETINFOLOGARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGetInfoLogARB"));
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pGlGetObjectParameterivARB = (PFNGLGETOBJECTPARAMETERIVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGetObjectParameterivARB"));
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pGlGetUniformLocationARB = (PFNGLGETUNIFORMLOCATIONARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGetUniformLocationARB"));
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pGlUniform4fvARB = (PFNGLUNIFORM4FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniform4fvARB"));
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pGlUniform1ivARB = (PFNGLUNIFORM1IVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniform1ivARB"));
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pGlUniform1fvARB = (PFNGLUNIFORM1FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniform1fvARB"));
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pGlUniform2fvARB = (PFNGLUNIFORM2FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniform2fvARB"));
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pGlUniform3fvARB = (PFNGLUNIFORM3FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniform3fvARB"));
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pGlUniform4fvARB = (PFNGLUNIFORM4FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniform4fvARB"));
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pGlUniformMatrix2fvARB = (PFNGLUNIFORMMATRIX2FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniformMatrix2fvARB"));
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pGlUniformMatrix3fvARB = (PFNGLUNIFORMMATRIX3FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniformMatrix3fvARB"));
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pGlUniformMatrix4fvARB = (PFNGLUNIFORMMATRIX4FVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUniformMatrix4fvARB"));
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pGlGetActiveUniformARB = (PFNGLGETACTIVEUNIFORMARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGetActiveUniformARB"));
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// get point parameter extension
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pGlPointParameterfARB = (PFNGLPOINTPARAMETERFARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glPointParameterfARB"));
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pGlPointParameterfvARB = (PFNGLPOINTPARAMETERFVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glPointParameterfvARB"));
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// get stencil extension
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pGlStencilFuncSeparate = (PFNGLSTENCILFUNCSEPARATEPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glStencilFuncSeparate"));
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pGlStencilOpSeparate = (PFNGLSTENCILOPSEPARATEPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glStencilOpSeparate"));
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pGlStencilFuncSeparateATI = (PFNGLSTENCILFUNCSEPARATEATIPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glStencilFuncSeparateATI"));
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pGlStencilOpSeparateATI = (PFNGLSTENCILOPSEPARATEATIPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glStencilOpSeparateATI"));
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// compressed textures
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pGlCompressedTexImage2D = (PFNGLCOMPRESSEDTEXIMAGE2DPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glCompressedTexImage2D"));
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#if defined(GLX_SGI_swap_control) && !defined(_IRR_USE_SDL_DEVICE_)
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// get vsync extension
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glxSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glXSwapIntervalSGI"));
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#endif
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// FrameBufferObjects
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pGlBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glBindFramebufferEXT"));
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pGlDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glDeleteFramebuffersEXT"));
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pGlGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGenFramebuffersEXT"));
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pGlCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glCheckFramebufferStatusEXT"));
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pGlFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glFramebufferTexture2DEXT"));
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pGlBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glBindRenderbufferEXT"));
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pGlDeleteRenderbuffersEXT = (PFNGLDELETERENDERBUFFERSEXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glDeleteRenderbuffersEXT"));
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pGlGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGenRenderbuffersEXT"));
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pGlRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glRenderbufferStorageEXT"));
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pGlFramebufferRenderbufferEXT = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glFramebufferRenderbufferEXT"));
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pGlDrawBuffersARB = (PFNGLDRAWBUFFERSARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glDrawBuffersARB"));
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pGlDrawBuffersATI = (PFNGLDRAWBUFFERSATIPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glDrawBuffersATI"));
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pGlGenBuffersARB = (PFNGLGENBUFFERSARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGenBuffersARB"));
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pGlBindBufferARB = (PFNGLBINDBUFFERARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glBindBufferARB"));
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pGlBufferDataARB = (PFNGLBUFFERDATAARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glBufferDataARB"));
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pGlDeleteBuffersARB = (PFNGLDELETEBUFFERSARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glDeleteBuffersARB"));
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pGlBufferSubDataARB = (PFNGLBUFFERSUBDATAARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glBufferSubDataARB"));
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pGlGetBufferSubDataARB = (PFNGLGETBUFFERSUBDATAARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGetBufferSubDataARB"));
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pGlMapBufferARB = (PFNGLMAPBUFFERARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glMapBufferARB"));
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pGlUnmapBufferARB = (PFNGLUNMAPBUFFERARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glUnmapBufferARB"));
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pGlIsBufferARB = (PFNGLISBUFFERARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glIsBufferARB"));
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pGlGetBufferParameterivARB = (PFNGLGETBUFFERPARAMETERIVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGetBufferParameterivARB"));
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pGlGetBufferPointervARB = (PFNGLGETBUFFERPOINTERVARBPROC)
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IRR_OGL_LOAD_EXTENSION(reinterpret_cast<const GLubyte*>("glGetBufferPointervARB"));
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#endif // _IRR_OPENGL_USE_EXTPOINTER_
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#endif // _IRR_WINDOWS_API_
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GLint num;
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// set some properties
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#if defined(GL_ARB_multitexture) || defined(GL_VERSION_1_3)
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if (Version>102 || FeatureAvailable[IRR_ARB_multitexture])
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{
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glGetIntegerv(GL_MAX_TEXTURE_UNITS, &num);
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MaxTextureUnits=static_cast<u8>(num);
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}
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#endif
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glGetIntegerv(GL_MAX_LIGHTS, &num);
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MaxLights=static_cast<u8>(num);
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#ifdef GL_EXT_texture_filter_anisotropic
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if (FeatureAvailable[IRR_EXT_texture_filter_anisotropic])
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glGetIntegerv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &num);
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MaxAnisotropy=static_cast<u8>(num);
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#endif
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#ifdef GL_VERSION_1_2
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if (Version>101)
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{
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glGetIntegerv(GL_MAX_ELEMENTS_INDICES, &num);
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MaxIndices=num;
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}
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#endif
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glGetIntegerv(GL_MAX_TEXTURE_SIZE, &num);
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MaxTextureSize=static_cast<u32>(num);
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#ifdef EXT_texture_lod_bias
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if (FeatureAvailable[IRR_EXT_texture_lod_bias])
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glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS_EXT, &MaxTextureLODBias);
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#endif
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glGetIntegerv(GL_MAX_CLIP_PLANES, &num);
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MaxUserClipPlanes=static_cast<u8>(num);
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glGetIntegerv(GL_AUX_BUFFERS, &num);
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MaxAuxBuffers=static_cast<u8>(num);
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#ifdef ARB_draw_buffers
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if (FeatureAvailable[IRR_ARB_draw_buffers])
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{
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glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, reinterpret_cast<GLint*>(&MaxUserClipPlanes));
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MaxMultipleRenderTargets = static_cast<u8>(MaxUserClipPlanes);
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}
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#elif defined(ATI_draw_buffers)
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if (FeatureAvailable[IRR_ATI_draw_buffers])
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{
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glGetIntegerv(GL_MAX_DRAW_BUFFERS_ATI, reinterpret_cast<GLint*>(&MaxUserClipPlanes));
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MaxMultipleRenderTargets = static_cast<u8>(MaxUserClipPlanes);
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}
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#endif
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#if defined(GL_ARB_shading_language_100) || defined (GL_VERSION_2_0)
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if (FeatureAvailable[IRR_ARB_shading_language_100] || Version>=200)
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{
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glGetError(); // clean error buffer
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#ifdef GL_SHADING_LANGUAGE_VERSION
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const GLubyte* shaderVersion = glGetString(GL_SHADING_LANGUAGE_VERSION);
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#else
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const GLubyte* shaderVersion = glGetString(GL_SHADING_LANGUAGE_VERSION_ARB);
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#endif
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if (glGetError() == GL_INVALID_ENUM)
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ShaderLanguageVersion = 100;
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else
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{
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const f32 sl_ver = core::fast_atof(reinterpret_cast<const c8*>(shaderVersion));
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ShaderLanguageVersion = static_cast<u16>(core::floor32(sl_ver)*100+core::round32(core::fract(sl_ver)*10.0f));
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}
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}
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#endif
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#ifdef _IRR_OPENGL_USE_EXTPOINTER_
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if (!pGlActiveTextureARB || !pGlClientActiveTextureARB)
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{
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MultiTextureExtension = false;
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os::Printer::log("Failed to load OpenGL's multitexture extension, proceeding without.", ELL_WARNING);
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}
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else
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#endif
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if (MaxTextureUnits < 2)
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{
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MultiTextureExtension = false;
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os::Printer::log("Warning: OpenGL device only has one texture unit. Disabling multitexturing.", ELL_WARNING);
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}
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MaxTextureUnits = core::min_(MaxTextureUnits,static_cast<u8>(MATERIAL_MAX_TEXTURES));
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}
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bool COpenGLExtensionHandler::queryFeature(E_VIDEO_DRIVER_FEATURE feature) const
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{
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switch (feature)
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{
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case EVDF_RENDER_TO_TARGET:
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return true;
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case EVDF_MULTITEXTURE:
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return MultiTextureExtension;
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case EVDF_BILINEAR_FILTER:
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return true;
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case EVDF_MIP_MAP:
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return true;
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case EVDF_MIP_MAP_AUTO_UPDATE:
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return FeatureAvailable[IRR_SGIS_generate_mipmap];
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case EVDF_STENCIL_BUFFER:
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return StencilBuffer;
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case EVDF_ARB_VERTEX_PROGRAM_1:
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return FeatureAvailable[IRR_ARB_vertex_program];
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case EVDF_ARB_FRAGMENT_PROGRAM_1:
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return FeatureAvailable[IRR_ARB_fragment_program];
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case EVDF_ARB_GLSL:
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return (FeatureAvailable[IRR_ARB_shading_language_100]||Version>=200);
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case EVDF_TEXTURE_NSQUARE:
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return true; // non-square is always supported
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case EVDF_TEXTURE_NPOT:
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// Some ATI cards seem to have only SW support in OpenGL 2.0
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// drivers if the extension is not exposed, so we skip this
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// extra test for now!
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// return (FeatureAvailable[IRR_ARB_texture_non_power_of_two]||Version>=200);
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return (FeatureAvailable[IRR_ARB_texture_non_power_of_two]);
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case EVDF_FRAMEBUFFER_OBJECT:
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return FeatureAvailable[IRR_EXT_framebuffer_object];
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case EVDF_VERTEX_BUFFER_OBJECT:
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return FeatureAvailable[IRR_ARB_vertex_buffer_object];
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case EVDF_COLOR_MASK:
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return true;
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case EVDF_ALPHA_TO_COVERAGE:
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return FeatureAvailable[IRR_ARB_multisample];
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default:
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return false;
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};
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}
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}
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}
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#endif
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