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emscripten-core
GitHub Repository: emscripten-core/emscripten
 Path: blob/main/system/lib/gl/gl.c
6169 views
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/*

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 * Copyright 2014 The Emscripten Authors.  All rights reserved.

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 * Emscripten is available under two separate licenses, the MIT license and the

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 * University of Illinois/NCSA Open Source License.  Both these licenses can be

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 * found in the LICENSE file.

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 */

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#if GL_ENABLE_GET_PROC_ADDRESS

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// GL proc address retrieval

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#include <string.h>

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#include <stdlib.h>

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#include <emscripten.h>

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#include <emscripten/html5_webgl.h>

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#define GL_GLEXT_PROTOTYPES

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#include <GL/gl.h>

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#include <GL/glext.h>

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#ifdef LEGACY_GL_EMULATION

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#include <webgl/webgl1_ext.h>

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#include "webgl_internal_funcs.h"

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#define RETURN_GL_EMU_FN(functionName) if (!strcmp(name, #functionName)) return emscripten_##functionName;

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void* emscripten_legacy_gl_emulation_GetProcAddress(const char *name) {

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  // main list, autogenerated from the earlier part of the file using

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  /*

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for line in open('a').readlines():

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  if "emscripten" not in line: continue

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  line = line.replace(' * ', ' ').replace('const ', '').replace('(', ' ')

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  func = line.split(' ')[3].strip().replace('(', '')

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  short = func.replace('EXT', '').replace('ARB', '').replace('OES', '').replace('ANGLE', '').replace('emscripten_', '')

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  print '  if (!strcmp(name, "%s")) return %s;' % (short, func);

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  */

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  // The following list contains only exactly those functions that library_glemu.js currently implements.

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  // Others will return a null pointer.

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  // misc renamings

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  if (!strcmp(name, "glCreateProgramObject")) return emscripten_glCreateProgram;

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  if (!strcmp(name, "glUseProgramObject")) return emscripten_glUseProgram;

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  if (!strcmp(name, "glCreateShaderObject")) return emscripten_glCreateShader;

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  if (!strcmp(name, "glAttachObject")) return emscripten_glAttachShader;

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  if (!strcmp(name, "glDetachObject")) return emscripten_glDetachShader;

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  RETURN_GL_EMU_FN(glDeleteObject);

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  RETURN_GL_EMU_FN(glGetObjectParameteriv);

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  RETURN_GL_EMU_FN(glGetInfoLog);

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  RETURN_GL_EMU_FN(glBindProgram);

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  RETURN_GL_EMU_FN(glGetPointerv);

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  RETURN_GL_EMU_FN(glBegin);

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  RETURN_GL_EMU_FN(glEnd);

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  //RETURN_GL_EMU_FN(glVertex2d);

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  RETURN_GL_EMU_FN(glVertex2f);

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  RETURN_GL_EMU_FN(glVertex2i);

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  //RETURN_GL_EMU_FN(glVertex2s);

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  //RETURN_GL_EMU_FN(glVertex3d);

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  RETURN_GL_EMU_FN(glVertex3f);

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  RETURN_GL_EMU_FN(glVertex3i);

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  //RETURN_GL_EMU_FN(glVertex3s);

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  //RETURN_GL_EMU_FN(glVertex4d);

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  RETURN_GL_EMU_FN(glVertex4f);

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  RETURN_GL_EMU_FN(glVertex4i);

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  //RETURN_GL_EMU_FN(glVertex4s);

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  //RETURN_GL_EMU_FN(glVertex2dv);

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  RETURN_GL_EMU_FN(glVertex2fv);

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  //RETURN_GL_EMU_FN(glVertex2iv);

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  //RETURN_GL_EMU_FN(glVertex2sv);

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  //RETURN_GL_EMU_FN(glVertex3dv);

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  RETURN_GL_EMU_FN(glVertex3fv);

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  //RETURN_GL_EMU_FN(glVertex3iv);

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  //RETURN_GL_EMU_FN(glVertex3sv);

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  //RETURN_GL_EMU_FN(glVertex4dv);

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  RETURN_GL_EMU_FN(glVertex4fv);

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  //RETURN_GL_EMU_FN(glVertex4iv);

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  //RETURN_GL_EMU_FN(glVertex4sv);

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  //RETURN_GL_EMU_FN(glColor3b);

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  RETURN_GL_EMU_FN(glColor3d);

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  RETURN_GL_EMU_FN(glColor3f);

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  //RETURN_GL_EMU_FN(glColor3i);

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  //RETURN_GL_EMU_FN(glColor3s);

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  RETURN_GL_EMU_FN(glColor3ub);

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  RETURN_GL_EMU_FN(glColor3ui);

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  RETURN_GL_EMU_FN(glColor3us);

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  //RETURN_GL_EMU_FN(glColor4b);

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  RETURN_GL_EMU_FN(glColor4d);

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  RETURN_GL_EMU_FN(glColor4f);

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  //RETURN_GL_EMU_FN(glColor4i);

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  //RETURN_GL_EMU_FN(glColor4s);

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  RETURN_GL_EMU_FN(glColor4ub);

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  RETURN_GL_EMU_FN(glColor4ui);

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  RETURN_GL_EMU_FN(glColor4us);

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  //RETURN_GL_EMU_FN(glColor3bv);

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  //RETURN_GL_EMU_FN(glColor3dv);

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  RETURN_GL_EMU_FN(glColor3fv);

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  //RETURN_GL_EMU_FN(glColor3iv);

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  //RETURN_GL_EMU_FN(glColor3sv);

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  RETURN_GL_EMU_FN(glColor3ubv);

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  RETURN_GL_EMU_FN(glColor3uiv);

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  RETURN_GL_EMU_FN(glColor3usv);

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  //RETURN_GL_EMU_FN(glColor4bv);

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  //RETURN_GL_EMU_FN(glColor4dv);

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  RETURN_GL_EMU_FN(glColor4fv);

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  //RETURN_GL_EMU_FN(glColor4iv);

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  //RETURN_GL_EMU_FN(glColor4sv);

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  RETURN_GL_EMU_FN(glColor4ubv);

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  //RETURN_GL_EMU_FN(glColor4uiv);

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  //RETURN_GL_EMU_FN(glColor4usv);

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  //RETURN_GL_EMU_FN(glFogCoordf);

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  //RETURN_GL_EMU_FN(glFogCoordfv);

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  //RETURN_GL_EMU_FN(glFogCoordd);

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  //RETURN_GL_EMU_FN(glFogCoorddv);

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  //RETURN_GL_EMU_FN(glFogCoordPointer);

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  RETURN_GL_EMU_FN(glPolygonMode);

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  RETURN_GL_EMU_FN(glAlphaFunc);

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  //RETURN_GL_EMU_FN(glNormal3b);

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  //RETURN_GL_EMU_FN(glNormal3d);

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  RETURN_GL_EMU_FN(glNormal3f);

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  //RETURN_GL_EMU_FN(glNormal3i);

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  //RETURN_GL_EMU_FN(glNormal3s);

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  //RETURN_GL_EMU_FN(glNormal3bv);

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  //RETURN_GL_EMU_FN(glNormal3dv);

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  //RETURN_GL_EMU_FN(glNormal3fv);

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  //RETURN_GL_EMU_FN(glNormal3iv);

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  //RETURN_GL_EMU_FN(glNormal3sv);

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  RETURN_GL_EMU_FN(glDrawRangeElements);

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  RETURN_GL_EMU_FN(glEnableClientState);

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  RETURN_GL_EMU_FN(glDisableClientState);

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  RETURN_GL_EMU_FN(glVertexPointer);

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  RETURN_GL_EMU_FN(glNormalPointer);

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  RETURN_GL_EMU_FN(glColorPointer);

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  RETURN_GL_EMU_FN(glTexCoordPointer);

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  RETURN_GL_EMU_FN(glClientActiveTexture);

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  RETURN_GL_EMU_FN(glMatrixMode);

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  RETURN_GL_EMU_FN(glPushMatrix);

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  RETURN_GL_EMU_FN(glPopMatrix);

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  RETURN_GL_EMU_FN(glLoadIdentity);

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  RETURN_GL_EMU_FN(glLoadMatrixd);

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  RETURN_GL_EMU_FN(glLoadMatrixf);

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  RETURN_GL_EMU_FN(glLoadTransposeMatrixf);

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  RETURN_GL_EMU_FN(glLoadTransposeMatrixd);

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  RETURN_GL_EMU_FN(glMultTransposeMatrixf);

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  RETURN_GL_EMU_FN(glMultTransposeMatrixd);

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  RETURN_GL_EMU_FN(glMultMatrixd);

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  RETURN_GL_EMU_FN(glMultMatrixf);

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  RETURN_GL_EMU_FN(glOrtho);

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  RETURN_GL_EMU_FN(glFrustum);

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  RETURN_GL_EMU_FN(glRotated);

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  RETURN_GL_EMU_FN(glRotatef);

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  RETURN_GL_EMU_FN(glScaled);

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  RETURN_GL_EMU_FN(glScalef);

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  RETURN_GL_EMU_FN(glTranslated);

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  RETURN_GL_EMU_FN(glTranslatef);

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  RETURN_GL_EMU_FN(glClipPlane);

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  RETURN_GL_EMU_FN(glDrawBuffer);

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  RETURN_GL_EMU_FN(glReadBuffer);

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  //RETURN_GL_EMU_FN(glLightf);

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  //RETURN_GL_EMU_FN(glLighti);

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  RETURN_GL_EMU_FN(glLightfv);

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  //RETURN_GL_EMU_FN(glLightiv);

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  RETURN_GL_EMU_FN(glLightModelf);

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  //RETURN_GL_EMU_FN(glLightModeli);

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  RETURN_GL_EMU_FN(glLightModelfv);

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  //RETURN_GL_EMU_FN(glLightModeliv);

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  //RETURN_GL_EMU_FN(glMaterialf);

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  //RETURN_GL_EMU_FN(glMateriali);

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  RETURN_GL_EMU_FN(glMaterialfv);

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  //RETURN_GL_EMU_FN(glMaterialiv);

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  //RETURN_GL_EMU_FN(glTexGend);

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  //RETURN_GL_EMU_FN(glTexGenf);

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  RETURN_GL_EMU_FN(glTexGeni);

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  //RETURN_GL_EMU_FN(glTexGendv);

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  RETURN_GL_EMU_FN(glTexGenfv);

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  //RETURN_GL_EMU_FN(glTexGeniv);

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  RETURN_GL_EMU_FN(glGetTexEnvfv);

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  RETURN_GL_EMU_FN(glGetTexEnviv);

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  RETURN_GL_EMU_FN(glTexImage1D);

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  //RETURN_GL_EMU_FN(glTexCoord1d);

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  //RETURN_GL_EMU_FN(glTexCoord1f);

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  //RETURN_GL_EMU_FN(glTexCoord1i);

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  //RETURN_GL_EMU_FN(glTexCoord1s);

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  //RETURN_GL_EMU_FN(glTexCoord2d);

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  RETURN_GL_EMU_FN(glTexCoord2f);

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  RETURN_GL_EMU_FN(glTexCoord2i);

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  //RETURN_GL_EMU_FN(glTexCoord2s);

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  //RETURN_GL_EMU_FN(glTexCoord3d);

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  RETURN_GL_EMU_FN(glTexCoord3f);

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  //RETURN_GL_EMU_FN(glTexCoord3i);

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  //RETURN_GL_EMU_FN(glTexCoord3s);

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  //RETURN_GL_EMU_FN(glTexCoord4d);

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  RETURN_GL_EMU_FN(glTexCoord4f);

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  //RETURN_GL_EMU_FN(glTexCoord4i);

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  //RETURN_GL_EMU_FN(glTexCoord4s);

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  //RETURN_GL_EMU_FN(glTexCoord1dv);

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  //RETURN_GL_EMU_FN(glTexCoord1fv);

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  //RETURN_GL_EMU_FN(glTexCoord1iv);

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  //RETURN_GL_EMU_FN(glTexCoord1sv);

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  //RETURN_GL_EMU_FN(glTexCoord2dv);

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  RETURN_GL_EMU_FN(glTexCoord2fv);

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  //RETURN_GL_EMU_FN(glTexCoord2iv);

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  //RETURN_GL_EMU_FN(glTexCoord2sv);

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  //RETURN_GL_EMU_FN(glTexCoord3dv);

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  //RETURN_GL_EMU_FN(glTexCoord3fv);

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  //RETURN_GL_EMU_FN(glTexCoord3iv);

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  //RETURN_GL_EMU_FN(glTexCoord3sv);

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  //RETURN_GL_EMU_FN(glTexCoord4dv);

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  //RETURN_GL_EMU_FN(glTexCoord4fv);

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  //RETURN_GL_EMU_FN(glTexCoord4iv);

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  //RETURN_GL_EMU_FN(glTexCoord4sv);

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  //RETURN_GL_EMU_FN(glGetTexLevelParameterfv);

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  RETURN_GL_EMU_FN(glGetTexLevelParameteriv);

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  RETURN_GL_EMU_FN(glShadeModel);

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  // GL emulation library "sloppy" lookup:

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  // WebGL 1 extensions are offered without their EXT suffixes.

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  if (!strcmp(name, "glBindVertexArray")) return emscripten_glBindVertexArrayOES;

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  if (!strcmp(name, "glDeleteVertexArrays")) return emscripten_glDeleteVertexArraysOES;

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  if (!strcmp(name, "glGenVertexArrays")) return emscripten_glGenVertexArraysOES;

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  if (!strcmp(name, "glIsVertexArray")) return emscripten_glIsVertexArrayOES;

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  if (!strcmp(name, "glDrawBuffers")) return emscripten_glDrawBuffersWEBGL;

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  if (!strcmp(name, "glDrawArraysInstanced")) return emscripten_glDrawArraysInstancedANGLE;

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  if (!strcmp(name, "glDrawElementsInstanced")) return emscripten_glDrawElementsInstancedANGLE;

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  if (!strcmp(name, "glVertexAttribDivisor")) return emscripten_glVertexAttribDivisorANGLE;

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  if (!strcmp(name, "glGenQueries")) return emscripten_glGenQueriesEXT;

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  if (!strcmp(name, "glDeleteQueries")) return emscripten_glDeleteQueriesEXT;

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  if (!strcmp(name, "glIsQuery")) return emscripten_glIsQueryEXT;

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  if (!strcmp(name, "glBeginQuery")) return emscripten_glBeginQueryEXT;

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  if (!strcmp(name, "glEndQuery")) return emscripten_glEndQueryEXT;

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  if (!strcmp(name, "glQueryCounter")) return emscripten_glQueryCounterEXT;

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  if (!strcmp(name, "glGetQueryiv")) return emscripten_glGetQueryivEXT;

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  if (!strcmp(name, "glGetQueryObjectiv")) return emscripten_glGetQueryObjectivEXT;

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  if (!strcmp(name, "glGetQueryObjectuiv")) return emscripten_glGetQueryObjectuivEXT;

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  if (!strcmp(name, "glGetQueryObjecti64v")) return emscripten_glGetQueryObjecti64vEXT;

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  if (!strcmp(name, "glGetQueryObjectui64v")) return emscripten_glGetQueryObjectui64vEXT;

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  return 0;

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}

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#endif

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void *_webgl1_match_ext_proc_address_without_suffix(const char *name);

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void *_webgl2_match_ext_proc_address_without_suffix(const char *name);

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// "Sloppy" desktop OpenGL/mobile GLES emulating

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// behavior: different functionality is available under

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// different vendor suffixes. In emscripten_GetProcAddress()

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// function, all these suffixes will be ignored when performing

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// the function pointer lookup.

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void* emscripten_GetProcAddress(const char *name_) {

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  char *name = malloc(strlen(name_)+1);

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  strcpy(name, name_);

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  // remove EXT|ARB|OES|ANGLE suffixes

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  char *end = strstr(name, "EXT");

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  if (end) *end = 0;

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  end = strstr(name, "ARB");

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  if (end) *end = 0;

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  end = strstr(name, "OES");

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  if (end) *end = 0;

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  end = strstr(name, "ANGLE");

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  if (end) *end = 0;

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  end = strstr(name, "WEBGL");

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  if (end) *end = 0;

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  void *ptr = emscripten_webgl1_get_proc_address(name);

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  if (!ptr) ptr = _webgl1_match_ext_proc_address_without_suffix(name);

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#if LEGACY_GL_EMULATION

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  if (!ptr) ptr = emscripten_legacy_gl_emulation_GetProcAddress(name);

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#endif

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#if MAX_WEBGL_VERSION >= 2

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  if (!ptr) ptr = emscripten_webgl2_get_proc_address(name);

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  if (!ptr) ptr = _webgl2_match_ext_proc_address_without_suffix(name);

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#endif

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  free(name);

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  return ptr;

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}

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extern void *emscripten_webgl_get_proc_address(const char *name)

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{

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  void *ptr = emscripten_webgl1_get_proc_address(name);

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#if MAX_WEBGL_VERSION >= 2

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  if (!ptr) ptr = emscripten_webgl2_get_proc_address(name);

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#endif

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  return ptr;

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}

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#endif

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