The correct answer for systems with different EGL and GLX driver implementations is to use GLVND.` Closes #165macos/v1.5.9
Emmanuele Bassi
7 years ago
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fc5750ca01
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5fa7bf6e27
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/*
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* Copyright © 2014 Intel Corporation |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice (including the next |
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* paragraph) shall be included in all copies or substantial portions of the |
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* Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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* IN THE SOFTWARE. |
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*/ |
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/**
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* @file egl_and_glx_different_pointers.c |
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* |
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* Tests that epoxy correctly handles an EGL and GLX implementation |
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* that return different function pointers between the two. |
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* |
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* This is the case for EGL and GLX on nvidia binary drivers |
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* currently, but is also the case if someone has nvidia binary GLX |
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* installed but still has Mesa (software) EGL installed. This seems |
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* common enough that we should make sure things work. |
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*/ |
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#define _GNU_SOURCE |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <assert.h> |
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#include <err.h> |
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#include <dlfcn.h> |
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#include "epoxy/gl.h" |
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#include "epoxy/egl.h" |
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#include "epoxy/glx.h" |
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#include "egl_common.h" |
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#include "glx_common.h" |
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#include "dlwrap.h" |
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#define GLX_FAKED_VENDOR_STRING "libepoxy override GLX" |
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#define EGL_FAKED_VENDOR_STRING "libepoxy override EGL" |
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#define GL_CREATESHADER_VALUE 1234 |
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#define GLES2_CREATESHADER_VALUE 5678 |
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const char *override_GLES2_glGetString(GLenum e); |
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const char *override_GL_glGetString(GLenum e); |
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GLuint override_GLES2_glCreateShader(GLenum e); |
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GLuint override_GL_glCreateShader(GLenum e); |
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const char * |
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override_GL_glGetString(GLenum e) |
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{ |
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if (e == GL_VENDOR) |
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return GLX_FAKED_VENDOR_STRING; |
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return DEFER_TO_GL("libGL.so.1", override_GL_glGetString, |
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"glGetString", (e)); |
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} |
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const char * |
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override_GLES2_glGetString(GLenum e) |
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{ |
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if (e == GL_VENDOR) |
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return EGL_FAKED_VENDOR_STRING; |
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return DEFER_TO_GL("libGLESv2.so.2", override_GLES2_glGetString, |
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"glGetString", (e)); |
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} |
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GLuint |
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override_GL_glCreateShader(GLenum type) |
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{ |
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return GL_CREATESHADER_VALUE; |
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} |
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GLuint |
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override_GLES2_glCreateShader(GLenum type) |
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{ |
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return GLES2_CREATESHADER_VALUE; |
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} |
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#ifdef USE_GLX |
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static bool |
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make_glx_current_and_test(Display *dpy, GLXContext ctx, Drawable draw) |
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{ |
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const char *string; |
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GLuint shader; |
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bool pass = true; |
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glXMakeCurrent(dpy, draw, ctx); |
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if (!epoxy_is_desktop_gl()) { |
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fputs("Claimed to be ES\n", stderr); |
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pass = false; |
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} |
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string = (const char *)glGetString(GL_VENDOR); |
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printf("GLX vendor: %s\n", string); |
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shader = glCreateShader(GL_FRAGMENT_SHADER); |
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if (shader != GL_CREATESHADER_VALUE) { |
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fprintf(stderr, "glCreateShader() returned %d instead of %d\n", |
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shader, GL_CREATESHADER_VALUE); |
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pass = false; |
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} |
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pass = pass && !strcmp(string, GLX_FAKED_VENDOR_STRING); |
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return pass; |
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} |
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static void |
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init_glx(Display **out_dpy, GLXContext *out_ctx, Drawable *out_draw) |
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{ |
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Display *dpy = get_display_or_skip(); |
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make_glx_context_current_or_skip(dpy); |
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*out_dpy = dpy; |
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*out_ctx = glXGetCurrentContext(); |
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*out_draw= glXGetCurrentDrawable(); |
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} |
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#endif /* USE_GLX */ |
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#ifdef USE_EGL |
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static bool |
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make_egl_current_and_test(EGLDisplay *dpy, EGLContext ctx) |
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{ |
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const char *string; |
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GLuint shader; |
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bool pass = true; |
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eglMakeCurrent(dpy, NULL, NULL, ctx); |
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if (epoxy_is_desktop_gl()) { |
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fputs("Claimed to be desktop\n", stderr); |
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pass = false; |
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} |
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if (epoxy_gl_version() < 20) { |
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fprintf(stderr, "Claimed to be GL version %d\n", |
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epoxy_gl_version()); |
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pass = false; |
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} |
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shader = glCreateShader(GL_FRAGMENT_SHADER); |
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if (shader != GLES2_CREATESHADER_VALUE) { |
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fprintf(stderr, "glCreateShader() returned %d instead of %d\n", |
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shader, GLES2_CREATESHADER_VALUE); |
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pass = false; |
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} |
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string = (const char *)glGetString(GL_VENDOR); |
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printf("EGL vendor: %s\n", string); |
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pass = pass && !strcmp(string, EGL_FAKED_VENDOR_STRING); |
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return pass; |
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} |
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static void |
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init_egl(EGLDisplay **out_dpy, EGLContext *out_ctx) |
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{ |
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EGLDisplay *dpy = get_egl_display_or_skip(); |
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static const EGLint config_attribs[] = { |
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT, |
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EGL_RED_SIZE, 1, |
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EGL_GREEN_SIZE, 1, |
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EGL_BLUE_SIZE, 1, |
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, |
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EGL_NONE |
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}; |
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static const EGLint context_attribs[] = { |
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EGL_CONTEXT_CLIENT_VERSION, 2, |
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EGL_NONE |
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}; |
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EGLContext ctx; |
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EGLConfig cfg; |
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EGLint count; |
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if (!epoxy_has_egl_extension(dpy, "EGL_KHR_surfaceless_context")) |
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errx(77, "Test requires EGL_KHR_surfaceless_context"); |
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eglBindAPI(EGL_OPENGL_ES_API); |
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if (!eglChooseConfig(dpy, config_attribs, &cfg, 1, &count)) |
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errx(77, "Couldn't get an EGLConfig\n"); |
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ctx = eglCreateContext(dpy, cfg, NULL, context_attribs); |
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if (!ctx) |
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errx(77, "Couldn't create a GLES2 context\n"); |
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*out_dpy = dpy; |
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*out_ctx = ctx; |
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} |
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#endif /* USE_EGL */ |
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int |
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main(int argc, char **argv) |
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{ |
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bool pass = true; |
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#ifdef USE_EGL |
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EGLDisplay *egl_dpy; |
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EGLContext egl_ctx; |
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#endif |
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#ifdef USE_GLX |
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Display *glx_dpy; |
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GLXContext glx_ctx; |
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Drawable glx_draw; |
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#endif |
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/* Force epoxy to have loaded both EGL and GLX libs already -- we
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* can't assume anything about symbol resolution based on having |
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* EGL or GLX loaded. |
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*/ |
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(void)glXGetCurrentContext(); |
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(void)eglGetCurrentContext(); |
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#ifdef USE_GLX |
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init_glx(&glx_dpy, &glx_ctx, &glx_draw); |
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pass = make_glx_current_and_test(glx_dpy, glx_ctx, glx_draw) && pass; |
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#endif |
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#ifdef USE_EGL |
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init_egl(&egl_dpy, &egl_ctx); |
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pass = make_egl_current_and_test(egl_dpy, egl_ctx) && pass; |
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#endif |
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#if defined(USE_GLX) && defined(USE_EGL) |
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pass = make_glx_current_and_test(glx_dpy, glx_ctx, glx_draw) && pass; |
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pass = make_egl_current_and_test(egl_dpy, egl_ctx) && pass; |
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#endif |
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return pass != true; |
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} |
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