Switch from GLEW to epoxy

.travis.yml

@@ -41,15 +41,15 @@ addons:
       - sparse
       - uuid-dev
       - libsdl2-dev
-      - libglew-dev
+      - libepoxy-dev
 
 git:
   # we want to do this ourselves
   submodules: false
 
 before_install:
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update ; fi
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install libffi gettext glib pixman pkg-config autoconf pixman sdl2 glew; fi
+  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install libffi gettext glib pixman pkg-config autoconf pixman sdl2 libepoxy; fi
 
 script:
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then ./build_macos.sh ; fi

appveyor.bat

@@ -24,9 +24,9 @@ bash -xlc "pacman --noconfirm -S --needed automake-wrapper"
 bash -xlc "pacman --noconfirm -S --needed mingw-w64-x86_64-libtool"
 bash -xlc "pacman --noconfirm -S --needed mingw-w64-x86_64-pkg-config"
 bash -xlc "pacman --noconfirm -S --needed mingw-w64-x86_64-glib2"
-bash -xlc "pacman --noconfirm -S --needed mingw-w64-x86_64-glew"
 bash -xlc "pacman --noconfirm -S --needed mingw-w64-x86_64-SDL2"
 bash -xlc "pacman --noconfirm -S --needed mingw-w64-x86_64-pixman"
+bash -xlc "pacman --noconfirm -S --needed mingw-w64-x86_64-libepoxy"
 
 rem Invoke subsequent bash in the build tree
 cd %APPVEYOR_BUILD_FOLDER%

configure

@@ -848,7 +848,7 @@ if test "$mingw32" = "yes" ; then
   QEMU_CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $QEMU_CFLAGS"
   # MinGW needs -mthreads for TLS and macro _MT.
   QEMU_CFLAGS="-mthreads $QEMU_CFLAGS"
-  LIBS="-lwinmm -lws2_32 -liphlpapi -lopengl32 -lglew32 -lgdi32 $LIBS"
+  LIBS="-lwinmm -lws2_32 -liphlpapi -lopengl32 -lepoxy -lgdi32 $LIBS"
   write_c_skeleton;
   if compile_prog "" "-liberty" ; then
     LIBS="-liberty $LIBS"
@@ -2948,7 +2948,7 @@ fi
 
 # Xbox hack to include ogl framework
 if test "$darwin" = "yes" ; then
-    sdl_libs="$sdl_libs -framework OpenGL"
+    sdl_libs="$sdl_libs -framework OpenGL -lepoxy"
 #     cat > $TMPC << EOF
 # #include <OpenGL/gl.h>
 # #include <OpenGL/CGLTypes.h>
@@ -2958,7 +2958,7 @@ if test "$darwin" = "yes" ; then
 fi
 
 if test "$linux" = "yes" ; then
-    sdl_libs="$sdl_libs -lGLEW -lGLU -lGL"
+    sdl_libs="$sdl_libs -lepoxy -lGLU -lGL"
 fi
 
 ##########################################

hw/xbox/nv2a/gl/Makefile.objs

@@ -1,4 +1,4 @@
-obj-y += gloffscreen_common.o glextensions.o
+obj-y += gloffscreen_common.o
 obj-$(CONFIG_WIN32) += gloffscreen_wgl.o
 obj-$(CONFIG_DARWIN) += gloffscreen_cgl.o
 obj-$(CONFIG_LINUX) += gloffscreen_glx.o

hw/xbox/nv2a/gl/gloffscreen.h

@@ -31,20 +31,16 @@
 
 #include <stdbool.h>
 
+#include <epoxy/gl.h>
+
 #if defined(__APPLE__)                 /* macOS-Specific GL Includes */
 #include <OpenGL/OpenGL.h>
 #include <OpenGL/gl3.h>
 #include <OpenGL/glext.h>
 #elif defined(_WIN32)                  /* Windows-Specific GL Includes */
-#include <GL/glew.h>
-#include <GL/wglew.h>
-#include <GL/gl.h>
-#include <GL/wglext.h>
+#include <epoxy/wgl.h>
 #else                                  /* Assume GLX */
-#include <GL/glew.h>
-#include <GL/glx.h>
-#include <GL/glxext.h>
-#include <GL/gl.h>
+#include <epoxy/glx.h>
 #endif
 
 /* Used to hold data for the OpenGL context */
@@ -56,7 +52,6 @@ void glo_set_current(GloContext *context);
 
 /* Check GL Extensions */
 bool glo_check_extension(const char* ext_name);
-void* glo_get_extension_proc(const char* extProc);
 
 /* Create an OpenGL context */
 GloContext *glo_context_create(void);

hw/xbox/nv2a/gl/gloffscreen_common.c

@@ -77,15 +77,7 @@ void glo_readpixels(GLenum gl_format, GLenum gl_type,
     glPixelStorei(GL_PACK_ALIGNMENT, pa);
 }
 
-
 bool glo_check_extension(const char* ext_name)
 {
-    int i;
-    int num_extensions = GL_NUM_EXTENSIONS;
-    for (i=0; i<num_extensions; i++) {
-      const char* ext = (const char*)glGetStringi(GL_EXTENSIONS, i);
-      if (!ext) break;
-      if (strcmp(ext, ext_name) == 0) return true;
-    }
-    return false;
+    return epoxy_has_gl_extension(ext_name);
 }

hw/xbox/nv2a/gl/gloffscreen_glx.c

@@ -105,28 +105,13 @@ GloContext *glo_context_create(void)
     if (context->glx_context == NULL) return NULL;
     glo_set_current(context);
 
-    if (!initialized) {
-        /* Initialize glew */
-        glewExperimental = GL_TRUE;
-        if (GLEW_OK != glewInit()) {
-            /* GLEW failed! */
-            fprintf(stderr,"GLEW init failed.\n");
-            exit(EXIT_FAILURE);
-        }
-
-        /* Get rid of GLEW errors */
-        while(glGetError() != GL_NO_ERROR);
-    }
+    /* Get rid of possible errors from within GL wrapper or glo */
+    while(glGetError() != GL_NO_ERROR);
 
     initialized = true;
     return context;
 }
 
-void* glo_get_extension_proc(const char* ext_proc)
-{
-    return glXGetProcAddress((const GLubyte *)ext_proc);
-}
-
 /* Set current context */
 void glo_set_current(GloContext *context)
 {

hw/xbox/nv2a/gl/gloffscreen_wgl.c

@@ -126,15 +126,9 @@ static void glo_init(void) {
     }
     wglMakeCurrent(glo.hDC, glo.hContext);
 
-    /* Initialize glew */
-    if (glewInit() != GLEW_OK) {
-        fprintf(stderr, "Glew init failed.\n");
-        abort();
-    }
-
-    if (!WGLEW_ARB_create_context
-        || !WGLEW_ARB_pixel_format
-        || !WGLEW_ARB_pbuffer) {
+    if (!epoxy_has_wgl_extension(glo.hDC, "ARB_create_context")
+        || !epoxy_has_wgl_extension(glo.hDC, "ARB_pixel_format")
+        || !epoxy_has_wgl_extension(glo.hDC, "ARB_pbuffer")) {
         fprintf(stderr, "Unable to load the required WGL extensions\n");
         abort();
     }

hw/xbox/nv2a/nv2a.h

@@ -40,7 +40,6 @@
 #include "nv2a_int.h"
 
 #include "gl/gloffscreen.h"
-#include "gl/glextensions.h"
 
 #define USE_TEXTURE_CACHE
 

hw/xbox/nv2a/nv2a_debug.c

@@ -29,6 +29,14 @@
 #include "nv2a_debug.h"
 #include "gl/glextensions.h"
 
+
+void gl_debug_initialize(void)
+{
+    if (glo_check_extension("GL_KHR_debug")) {
+       glEnable(GL_DEBUG_OUTPUT);
+    }
+}
+
 void gl_debug_message(bool cc, const char *fmt, ...)
 {
     size_t n;

hw/xbox/nv2a/nv2a_pgraph.c

@@ -2641,11 +2641,9 @@ void pgraph_init(NV2AState *d)
     assert(pg->gl_context);
 
 #ifdef DEBUG_NV2A_GL
-    glEnable(GL_DEBUG_OUTPUT);
+    gl_debug_initialize();
 #endif
 
-    glextensions_init();
-
     /* DXT textures */
     assert(glo_check_extension("GL_EXT_texture_compression_s3tc"));
     /*  Internal RGB565 texture format */