--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+/**
+ * This is an EGL driver that wraps GLX. This gives the benefit of being
+ * completely agnostic of the direct rendering implementation.
+ *
+ * Authors: Alan Hourihane <alanh@tungstengraphics.com>
+ */
+
+/*
+ * TODO:
+ *
+ * Add GLXFBConfig support
+ * Pbuffer & Pixmap support
+ * test eglBind/ReleaseTexImage
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "dlfcn.h"
+#include <X11/Xlib.h>
+#include <GL/gl.h>
+#include "glxclient.h"
+
+#define _EGL_PLATFORM_X
+
+#include "eglconfig.h"
+#include "eglcontext.h"
+#include "egldisplay.h"
+#include "egldriver.h"
+#include "eglglobals.h"
+#include "eglhash.h"
+#include "egllog.h"
+#include "eglsurface.h"
+
+#include <GL/gl.h>
+
+#define CALLOC_STRUCT(T) (struct T *) calloc(1, sizeof(struct T))
+
+static const EGLint all_apis = (EGL_OPENGL_ES_BIT |
+ EGL_OPENGL_ES2_BIT |
+ EGL_OPENVG_BIT |
+ EGL_OPENGL_BIT);
+
+struct visual_attribs
+{
+ /* X visual attribs */
+ int id;
+ int klass;
+ int depth;
+ int redMask, greenMask, blueMask;
+ int colormapSize;
+ int bitsPerRGB;
+
+ /* GL visual attribs */
+ int supportsGL;
+ int transparentType;
+ int transparentRedValue;
+ int transparentGreenValue;
+ int transparentBlueValue;
+ int transparentAlphaValue;
+ int transparentIndexValue;
+ int bufferSize;
+ int level;
+ int render_type;
+ int doubleBuffer;
+ int stereo;
+ int auxBuffers;
+ int redSize, greenSize, blueSize, alphaSize;
+ int depthSize;
+ int stencilSize;
+ int accumRedSize, accumGreenSize, accumBlueSize, accumAlphaSize;
+ int numSamples, numMultisample;
+ int visualCaveat;
+};
+
+/** subclass of _EGLDriver */
+struct GLX_egl_driver
+{
+ _EGLDriver Base; /**< base class */
+
+ XVisualInfo *visuals;
+
+ /* GLXFBConfig *fbconfigs - todo */
+};
+
+
+/** subclass of _EGLContext */
+struct GLX_egl_context
+{
+ _EGLContext Base; /**< base class */
+
+ GLXContext context;
+};
+
+
+/** subclass of _EGLSurface */
+struct GLX_egl_surface
+{
+ _EGLSurface Base; /**< base class */
+
+ GLXDrawable drawable;
+};
+
+
+/** subclass of _EGLConfig */
+struct GLX_egl_config
+{
+ _EGLConfig Base; /**< base class */
+};
+
+/** cast wrapper */
+static struct GLX_egl_driver *
+GLX_egl_driver(_EGLDriver *drv)
+{
+ return (struct GLX_egl_driver *) drv;
+}
+
+static struct GLX_egl_context *
+GLX_egl_context(_EGLContext *ctx)
+{
+ return (struct GLX_egl_context *) ctx;
+}
+
+static struct GLX_egl_surface *
+GLX_egl_surface(_EGLSurface *surf)
+{
+ return (struct GLX_egl_surface *) surf;
+}
+
+static GLboolean
+get_visual_attribs(Display *dpy, XVisualInfo *vInfo,
+ struct visual_attribs *attribs)
+{
+ const char *ext = glXQueryExtensionsString(dpy, vInfo->screen);
+ int rgba;
+
+ memset(attribs, 0, sizeof(struct visual_attribs));
+
+ attribs->id = vInfo->visualid;
+#if defined(__cplusplus) || defined(c_plusplus)
+ attribs->klass = vInfo->c_class;
+#else
+ attribs->klass = vInfo->class;
+#endif
+ attribs->depth = vInfo->depth;
+ attribs->redMask = vInfo->red_mask;
+ attribs->greenMask = vInfo->green_mask;
+ attribs->blueMask = vInfo->blue_mask;
+ attribs->colormapSize = vInfo->colormap_size;
+ attribs->bitsPerRGB = vInfo->bits_per_rgb;
+
+ if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0 ||
+ !attribs->supportsGL)
+ return GL_FALSE;
+ glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize);
+ glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level);
+ glXGetConfig(dpy, vInfo, GLX_RGBA, &rgba);
+ if (!rgba)
+ return GL_FALSE;
+ attribs->render_type = GLX_RGBA_BIT;
+
+ glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer);
+ glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo);
+ glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers);
+ glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize);
+ glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize);
+ glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize);
+ glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize);
+ glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize);
+ glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize);
+ glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize);
+ glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize);
+ glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize);
+ glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize);
+
+ /* get transparent pixel stuff */
+ glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType);
+ if (attribs->transparentType == GLX_TRANSPARENT_RGB) {
+ glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue);
+ glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue);
+ glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue);
+ glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue);
+ }
+ else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) {
+ glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue);
+ }
+
+ /* multisample attribs */
+#ifdef GLX_ARB_multisample
+ if (ext && strstr(ext, "GLX_ARB_multisample")) {
+ glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample);
+ glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples);
+ }
+#endif
+ else {
+ attribs->numSamples = 0;
+ attribs->numMultisample = 0;
+ }
+
+#if defined(GLX_EXT_visual_rating)
+ if (ext && strstr(ext, "GLX_EXT_visual_rating")) {
+ glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat);
+ }
+ else {
+ attribs->visualCaveat = GLX_NONE_EXT;
+ }
+#else
+ attribs->visualCaveat = 0;
+#endif
+
+ return GL_TRUE;
+}
+
+static EGLBoolean
+create_configs(_EGLDisplay *disp, struct GLX_egl_driver *GLX_drv)
+{
+ XVisualInfo theTemplate;
+ int numVisuals;
+ long mask;
+ int i;
+ struct visual_attribs attribs;
+
+ /* get list of all visuals on this screen */
+ theTemplate.screen = DefaultScreen(disp->Xdpy);
+ mask = VisualScreenMask;
+ GLX_drv->visuals = XGetVisualInfo(disp->Xdpy, mask, &theTemplate, &numVisuals);
+
+ for (i = 0; i < numVisuals; i++) {
+ struct GLX_egl_config *config;
+
+ if (!get_visual_attribs(disp->Xdpy, &GLX_drv->visuals[i], &attribs))
+ continue;
+
+ if (attribs.doubleBuffer) {
+ config = CALLOC_STRUCT(GLX_egl_config);
+
+ _eglInitConfig(&config->Base, i+1);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_NATIVE_VISUAL_ID, attribs.id);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_BUFFER_SIZE, attribs.bufferSize);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_RED_SIZE, attribs.redSize);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_GREEN_SIZE, attribs.greenSize);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_BLUE_SIZE, attribs.blueSize);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_ALPHA_SIZE, attribs.alphaSize);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_DEPTH_SIZE, attribs.depthSize);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_STENCIL_SIZE, attribs.stencilSize);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_SAMPLES, attribs.numSamples);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_SAMPLE_BUFFERS, attribs.numMultisample);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_CONFORMANT, all_apis);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_RENDERABLE_TYPE, all_apis);
+ SET_CONFIG_ATTRIB(&config->Base, EGL_SURFACE_TYPE,
+ (EGL_WINDOW_BIT /*| EGL_PBUFFER_BIT | EGL_PIXMAP_BIT*/));
+
+ /* XXX possibly other things to init... */
+
+ _eglAddConfig(disp, &config->Base);
+ }
+ }
+
+ return EGL_TRUE;
+}
+
+/**
+ * Called via eglInitialize(), GLX_drv->API.Initialize().
+ */
+static EGLBoolean
+GLX_eglInitialize(_EGLDriver *drv, EGLDisplay dpy,
+ EGLint *minor, EGLint *major)
+{
+ struct GLX_egl_driver *GLX_drv = GLX_egl_driver(drv);
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+
+ _eglLog(_EGL_DEBUG, "XDRI: eglInitialize");
+
+ if (!disp->Xdpy) {
+ disp->Xdpy = XOpenDisplay(NULL);
+ if (!disp->Xdpy) {
+ _eglLog(_EGL_WARNING, "XDRI: XOpenDisplay failed");
+ return EGL_FALSE;
+ }
+ }
+
+ GLX_drv->Base.Initialized = EGL_TRUE;
+
+ GLX_drv->Base.Name = "GLX";
+
+ /* we're supporting EGL 1.4 */
+ *minor = 1;
+ *major = 4;
+
+ create_configs(disp, GLX_drv);
+
+ return EGL_TRUE;
+}
+
+
+/**
+ * Called via eglTerminate(), drv->API.Terminate().
+ */
+static EGLBoolean
+GLX_eglTerminate(_EGLDriver *drv, EGLDisplay dpy)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+
+ _eglLog(_EGL_DEBUG, "XDRI: eglTerminate");
+
+// XCloseDisplay(disp->Xdpy);
+
+ return EGL_TRUE;
+}
+
+
+/**
+ * Called via eglCreateContext(), drv->API.CreateContext().
+ */
+static EGLContext
+GLX_eglCreateContext(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
+ EGLContext share_list, const EGLint *attrib_list)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+ struct GLX_egl_context *GLX_ctx = CALLOC_STRUCT(GLX_egl_context);
+ struct GLX_egl_driver *GLX_drv = GLX_egl_driver(drv);
+ struct GLX_egl_context *GLX_ctx_shared = NULL;
+ _EGLConfig *conf;
+
+ if (!GLX_ctx)
+ return EGL_NO_CONTEXT;
+
+ if (!_eglInitContext(drv, dpy, &GLX_ctx->Base, config, attrib_list)) {
+ free(GLX_ctx);
+ return EGL_NO_CONTEXT;
+ }
+
+ if (share_list != EGL_NO_CONTEXT) {
+ _EGLContext *shareCtx = _eglLookupContext(share_list);
+ if (!shareCtx) {
+ _eglError(EGL_BAD_CONTEXT, "eglCreateContext(share_list)");
+ return EGL_FALSE;
+ }
+ GLX_ctx_shared = GLX_egl_context(shareCtx);
+ }
+
+ conf = _eglLookupConfig(drv, dpy, config);
+ assert(conf);
+
+ GLX_ctx->context = glXCreateContext(disp->Xdpy, &GLX_drv->visuals[(int)config-1], GLX_ctx_shared ? GLX_ctx_shared->context : NULL, GL_TRUE);
+ if (!GLX_ctx->context)
+ return EGL_FALSE;
+
+ /* need to have a direct rendering context */
+ if (!glXIsDirect(disp->Xdpy, GLX_ctx->context))
+ return EGL_FALSE;
+
+ return _eglGetContextHandle(&GLX_ctx->Base);
+}
+
+
+/**
+ * Called via eglMakeCurrent(), drv->API.MakeCurrent().
+ */
+static EGLBoolean
+GLX_eglMakeCurrent(_EGLDriver *drv, EGLDisplay dpy, EGLSurface d,
+ EGLSurface r, EGLContext context)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+ _EGLContext *ctx = _eglLookupContext(context);
+ _EGLSurface *dsurf = _eglLookupSurface(d);
+ _EGLSurface *rsurf = _eglLookupSurface(r);
+ struct GLX_egl_surface *GLX_dsurf = GLX_egl_surface(dsurf);
+ struct GLX_egl_surface *GLX_rsurf = GLX_egl_surface(rsurf);
+ struct GLX_egl_context *GLX_ctx = GLX_egl_context(ctx);
+
+ if (!_eglMakeCurrent(drv, dpy, d, r, context))
+ return EGL_FALSE;
+
+// if (!glXMakeContextCurrent(disp->Xdpy, GLX_dsurf->drawable, GLX_rsurf->drawable, GLX_ctx->context))
+ if (!glXMakeCurrent(disp->Xdpy, GLX_dsurf ? GLX_dsurf->drawable : 0, GLX_ctx ? GLX_ctx->context : NULL))
+ return EGL_FALSE;
+
+ return EGL_TRUE;
+}
+
+/** Get size of given window */
+static Status
+get_drawable_size(Display *dpy, Drawable d, uint *width, uint *height)
+{
+ Window root;
+ Status stat;
+ int xpos, ypos;
+ unsigned int w, h, bw, depth;
+ stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
+ *width = w;
+ *height = h;
+ return stat;
+}
+
+/**
+ * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
+ */
+static EGLSurface
+GLX_eglCreateWindowSurface(_EGLDriver *drv, EGLDisplay dpy, EGLConfig config,
+ NativeWindowType window, const EGLint *attrib_list)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+ struct GLX_egl_surface *GLX_surf;
+ uint width, height;
+
+ GLX_surf = CALLOC_STRUCT(GLX_egl_surface);
+ if (!GLX_surf)
+ return EGL_NO_SURFACE;
+
+ if (!_eglInitSurface(drv, dpy, &GLX_surf->Base, EGL_WINDOW_BIT,
+ config, attrib_list)) {
+ free(GLX_surf);
+ return EGL_FALSE;
+ }
+
+ _eglSaveSurface(&GLX_surf->Base);
+
+ GLX_surf->drawable = window;
+ get_drawable_size(disp->Xdpy, window, &width, &height);
+ GLX_surf->Base.Width = width;
+ GLX_surf->Base.Height = height;
+
+ return _eglGetSurfaceHandle(&GLX_surf->Base);
+}
+
+static EGLBoolean
+GLX_eglDestroySurface(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+ _EGLSurface *surf = _eglLookupSurface(surface);
+ return EGL_TRUE;
+ if (surf) {
+ _eglHashRemove(_eglGlobal.Surfaces, (EGLuint) surface);
+ if (surf->IsBound) {
+ surf->DeletePending = EGL_TRUE;
+ }
+ else {
+ free(surf);
+ }
+
+ return EGL_TRUE;
+ }
+ else {
+ _eglError(EGL_BAD_SURFACE, "eglDestroySurface");
+ return EGL_FALSE;
+ }
+}
+
+
+static EGLBoolean
+GLX_eglBindTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
+ EGLint buffer)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+ _EGLSurface *surf = _eglLookupSurface(surface);
+ struct GLX_egl_surface *GLX_surf = GLX_egl_surface(surf);
+
+ /* buffer ?? */
+ glXBindTexImageEXT(disp->Xdpy, GLX_surf->drawable, GLX_FRONT_LEFT_EXT, NULL);
+
+ return EGL_TRUE;
+}
+
+
+static EGLBoolean
+GLX_eglReleaseTexImage(_EGLDriver *drv, EGLDisplay dpy, EGLSurface surface,
+ EGLint buffer)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+ _EGLSurface *surf = _eglLookupSurface(surface);
+ struct GLX_egl_surface *GLX_surf = GLX_egl_surface(surf);
+
+ /* buffer ?? */
+ glXReleaseTexImageEXT(disp->Xdpy, GLX_surf->drawable, GLX_FRONT_LEFT_EXT);
+
+ return EGL_TRUE;
+}
+
+
+static EGLBoolean
+GLX_eglSwapBuffers(_EGLDriver *drv, EGLDisplay dpy, EGLSurface draw)
+{
+ _EGLDisplay *disp = _eglLookupDisplay(dpy);
+ _EGLSurface *surf = _eglLookupSurface(draw);
+ struct GLX_egl_surface *GLX_surf = GLX_egl_surface(surf);
+
+ _eglLog(_EGL_DEBUG, "XDRI: EGL SwapBuffers 0x%x",draw);
+
+ /* error checking step: */
+ if (!_eglSwapBuffers(drv, dpy, draw))
+ return EGL_FALSE;
+
+ glXSwapBuffers(disp->Xdpy, GLX_surf->drawable);
+
+ return EGL_TRUE;
+}
+
+/*
+ * Called from eglGetProcAddress() via drv->API.GetProcAddress().
+ */
+static _EGLProc
+GLX_eglGetProcAddress(const char *procname)
+{
+ return (_EGLProc)glXGetProcAddress((const GLubyte *)procname);
+}
+
+
+/**
+ * This is the main entrypoint into the driver, called by libEGL.
+ * Create a new _EGLDriver object and init its dispatch table.
+ */
+_EGLDriver *
+_eglMain(_EGLDisplay *disp, const char *args)
+{
+ struct GLX_egl_driver *GLX_drv = CALLOC_STRUCT(GLX_egl_driver);
+ if (!GLX_drv)
+ return NULL;
+
+ _eglInitDriverFallbacks(&GLX_drv->Base);
+ GLX_drv->Base.API.Initialize = GLX_eglInitialize;
+ GLX_drv->Base.API.Terminate = GLX_eglTerminate;
+ GLX_drv->Base.API.CreateContext = GLX_eglCreateContext;
+ GLX_drv->Base.API.MakeCurrent = GLX_eglMakeCurrent;
+ GLX_drv->Base.API.CreateWindowSurface = GLX_eglCreateWindowSurface;
+ GLX_drv->Base.API.DestroySurface = GLX_eglDestroySurface;
+ GLX_drv->Base.API.BindTexImage = GLX_eglBindTexImage;
+ GLX_drv->Base.API.ReleaseTexImage = GLX_eglReleaseTexImage;
+ GLX_drv->Base.API.SwapBuffers = GLX_eglSwapBuffers;
+ GLX_drv->Base.API.GetProcAddress = GLX_eglGetProcAddress;
+
+ GLX_drv->Base.ClientAPIsMask = all_apis;
+ GLX_drv->Base.Name = "GLX";
+
+ _eglLog(_EGL_DEBUG, "GLX: main(%s)", args);
+
+ /* set new DRI path to pick up EGL version (no mesa code), but don't
+ * override if one is already set.
+ */
+ setenv("LIBGL_DRIVERS_PATH", DEFAULT_DRIVER_DIR"/egl", 0);
+
+ return &GLX_drv->Base;
+}
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