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CloudefCloudef
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Add GLEW 1.10.0 emulation
Includes library_glew.js that stubs the init functions, but also provides the other functions. GL/glew.h is now changed to work with GLEW_EXT_foo_bar constants, some missing constants that are in GLEW 1.10.0 are also provided. Otherwise it still uses SDL_opengl.h to provide function definitions and other constants. Linaro's GLEW (glew-oes) is also supported to some degree to make it easier to get ES1 and ES2 software using it running. What it lacks: - Some constants and function declarations that are in GLEW 1.10.0 might be missing. - The real glew-es fork also includes normal GL constants and function pointers, this does not. Tests ran: - tests/runner.py browser Real world example using this code (and upcomming glfw3 port) can be found here: http://cloudef.eu/glhck http://cloudef.eu/glhck/qb.html
1 parent 0e36f07 commit a39788f

6 files changed

Lines changed: 1029 additions & 5 deletions

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‎AUTHORS‎

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@@ -117,3 +117,4 @@ a license to everyone to use it as detailed in LICENSE.)
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* Andre Weissflog <[email protected]>
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* Alexandre Perrot <[email protected]>
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* Emerson José Silveira da Costa <[email protected]>
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* Jari Vetoniemi <[email protected]>

‎src/library_glew.js‎

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/*******************************************************************************
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* EMSCRIPTEN GLEW 1.10.0 emulation
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*
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* What it does:
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* - Stubs init function.
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* - GL Extensions support.
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*
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* Optional:
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* - isLinaroFork variable to enable glew-es specific error strings.
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* This is enabled by default, but should be disabled when upstream glew conflicts.
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*
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* Authors:
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* - Jari Vetoniemi <[email protected]>
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******************************************************************************/
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var LibraryGLEW = {
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$GLEW__deps: ['glGetString'],
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$GLEW: {
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isLinaroFork: 1,
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extensions: null,
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error: {
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0:null, // GLEW_OK || GLEW_NO_ERROR
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1:null, // GLEW_ERROR_NO_GL_VERSION
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2:null, // GLEW_ERROR_GL_VERSION_10_ONLY
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3:null, // GLEW_ERROR_GLX_VERSION_11_ONLY
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4:null, // GLEW_ERROR_NOT_GLES_VERSION
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5:null, // GLEW_ERROR_GLES_VERSION
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6:null, // GLEW_ERROR_NO_EGL_VERSION
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7:null, // GLEW_ERROR_EGL_VERSION_10_ONLY
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8:null, // Unknown error
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},
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version: {
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1:null, // GLEW_VERSION
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2:null, // GLEW_VERSION_MAJOR
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3:null, // GLEW_VERSION_MINOR
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4:null, // GLEW_VERSION_MICRO
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},
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errorStringConstantFromCode: function(error) {
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if (GLEW.isLinaroFork) {
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switch (error) {
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case 4:return "OpenGL ES lib expected, found OpenGL lib"; // GLEW_ERROR_NOT_GLES_VERSION
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case 5:return "OpenGL lib expected, found OpenGL ES lib"; // GLEW_ERROR_GLES_VERSION
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case 6:return "Missing EGL version"; // GLEW_ERROR_NO_EGL_VERSION
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case 7:return "EGL 1.1 and up are supported"; // GLEW_ERROR_EGL_VERSION_10_ONLY
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default:break;
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}
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}
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switch (error) {
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case 0:return "No error"; // GLEW_OK || GLEW_NO_ERROR
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case 1:return "Missing GL version"; // GLEW_ERROR_NO_GL_VERSION
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case 2:return "GL 1.1 and up are supported"; // GLEW_ERROR_GL_VERSION_10_ONLY
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case 3:return "GLX 1.2 and up are supported"; // GLEW_ERROR_GLX_VERSION_11_ONLY
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default:return null;
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}
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},
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errorString: function(error) {
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if (!GLEW.error[error]) {
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var string = GLEW.errorStringConstantFromCode(error);
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if (!string) {
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string = "Unknown error";
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error = 8; // prevent array from growing more than this
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}
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GLEW.error[error] = allocate(intArrayFromString(string), 'i8', ALLOC_NORMAL);
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}
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return GLEW.error[error];
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},
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versionStringConstantFromCode: function(name) {
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switch (name) {
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case 1:return "1.10.0"; // GLEW_VERSION
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case 2:return "1"; // GLEW_VERSION_MAJOR
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case 3:return "10"; // GLEW_VERSION_MINOR
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case 4:return "0"; // GLEW_VERSION_MICRO
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default:return null;
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}
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},
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versionString: function(name) {
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if (!GLEW.version[name]) {
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var string = GLEW.versionStringConstantFromCode(name);
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if (!string)
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return 0;
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GLEW.version[name] = allocate(intArrayFromString(string), 'i8', ALLOC_NORMAL);
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}
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return GLEW.version[name];
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},
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extensionIsSupported: function(name) {
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if (!GLEW.extensions) {
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GLEW.extensions = Pointer_stringify(_glGetString(0x1F03)).split(' ');
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}
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if (GLEW.extensions.indexOf(name) != -1)
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return 1;
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// extensions from GLEmulations do not come unprefixed
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// so, try with prefix
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return (GLEW.extensions.indexOf("GL_" + name) != -1);
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},
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},
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glewInit: function() { return 0; },
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glewIsSupported: function(name) {
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var exts = Pointer_stringify(name).split(' ');
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for (i in exts) {
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if (!GLEW.extensionIsSupported(exts[i]))
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return 0;
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}
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return 1;
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},
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glewGetExtension: function(name) {
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return GLEW.extensionIsSupported(Pointer_stringify(name));
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},
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glewGetErrorString: function(error) {
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return GLEW.errorString(error);
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},
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glewGetString: function(name) {
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return GLEW.versionString(name);
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},
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};
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autoAddDeps(LibraryGLEW, '$GLEW');
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mergeInto(LibraryManager.library, LibraryGLEW);

‎src/modules.js‎

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@@ -424,7 +424,7 @@ var LibraryManager = {
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load: function() {
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if (this.library) return;
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var libraries = ['library.js', 'library_path.js', 'library_fs.js', 'library_idbfs.js', 'library_memfs.js', 'library_nodefs.js', 'library_sockfs.js', 'library_tty.js', 'library_browser.js', 'library_sdl.js', 'library_gl.js', 'library_glut.js', 'library_xlib.js', 'library_egl.js', 'library_gc.js', 'library_jansson.js', 'library_openal.js', 'library_glfw.js', 'library_uuid.js'].concat(additionalLibraries);
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var libraries = ['library.js', 'library_path.js', 'library_fs.js', 'library_idbfs.js', 'library_memfs.js', 'library_nodefs.js', 'library_sockfs.js', 'library_tty.js', 'library_browser.js', 'library_sdl.js', 'library_gl.js', 'library_glut.js', 'library_xlib.js', 'library_egl.js', 'library_gc.js', 'library_jansson.js', 'library_openal.js', 'library_glfw.js', 'library_uuid.js', 'library_glew.js'].concat(additionalLibraries);
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for (var i = 0; i < libraries.length; i++) {
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eval(processMacros(preprocess(read(libraries[i]))));
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}

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