/**
* Returns the X11 VisualID that corresponds to the best GLXFBConfig for the
* given screen. If no valid visual could be found, this method returns zero.
* Note that this method will attempt to initialize GLX (and all the
* necessary function symbols) if it has not been already. The AWT_LOCK
* must be acquired before calling this method.
*/
VisualID
GLXGC_FindBestVisual(JNIEnv *env, jint screen)
{
GLXFBConfig fbc;
XVisualInfo *xvi;
VisualID visualid;
J2dRlsTraceLn1(J2D_TRACE_INFO, "GLXGC_FindBestVisual: scn=%d", screen);
if (!GLXGC_IsGLXAvailable()) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGC_FindBestVisual: could not initialize GLX");
return 0;
}
fbc = GLXGC_InitFBConfig(env, screen, 0);
if (fbc == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGC_FindBestVisual: could not find best visual");
return 0;
}
xvi = j2d_glXGetVisualFromFBConfig(awt_display, fbc);
if (xvi == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGC_FindBestVisual: could not get visual for fbconfig");
return 0;
}
visualid = xvi->visualid;
XFree(xvi);
J2dRlsTraceLn2(J2D_TRACE_INFO,
"GLXGC_FindBestVisual: chose 0x%x as the best visual for screen %d",
visualid, screen);
return visualid;
}
/**
* Determines whether the GLX pipeline can be used for a given GraphicsConfig
* provided its screen number and visual ID. If the minimum requirements are
* met, the native GLXGraphicsConfigInfo structure is initialized for this
* GraphicsConfig with the necessary information (pthread key, GLXFBConfig,
* etc.) and a pointer to this structure is returned as a jlong. If
* initialization fails at any point, zero is returned, indicating that GLX
* cannot be used for this GraphicsConfig (we should fallback on the existing
* X11 pipeline).
*/
static jlong
GLXGC_GetGLXConfigInfo(JNIEnv *env, jint screennum, jint visnum)
{
GLXFBConfig fbconfig;
GLXContext context;
GLXPbuffer glxpbuffer;
int pbattrlist[] = {GLX_PBUFFER_WIDTH, 1,
GLX_PBUFFER_HEIGHT, 1,
GLX_PRESERVED_CONTENTS, GL_FALSE,
0};
GLXGraphicsConfigInfo *glxinfo;
int db;
const unsigned char *versionstr;
J2dTraceLn(J2D_TRACE_INFO, "in GLXGC_GetGLXConfigInfo");
fbconfig = GLXGC_InitFBConfig(env, screennum, visnum);
if (fbconfig == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create fbconfig");
return 0;
}
glxinfo = (GLXGraphicsConfigInfo *)malloc(sizeof(GLXGraphicsConfigInfo));
if (glxinfo == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "could not allocate memory for glxinfo");
return 0;
}
// create a temporary context, used for querying OpenGL version and
// extensions
context = j2d_glXCreateNewContext(awt_display, fbconfig,
GLX_RGBA_TYPE, NULL, GL_TRUE);
if (context == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create temp GLX context");
free(glxinfo);
return 0;
}
// this is pretty sketchy, but it seems to be the easiest way to create
// some form of GLXDrawable using only the display and a GLXFBConfig
// (in order to make the context current for checking the version,
// extensions, etc)...
glxpbuffer = j2d_glXCreatePbuffer(awt_display, fbconfig, pbattrlist);
if (glxpbuffer == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create scratch pbuffer");
j2d_glXDestroyContext(awt_display, context);
free(glxinfo);
return 0;
}
// the temporary context must be made current before we can query the
// version and extension strings
j2d_glXMakeContextCurrent(awt_display, glxpbuffer, glxpbuffer, context);
versionstr = j2d_glGetString(GL_VERSION);
OGLContext_GetExtensionInfo(&glxinfo->extInfo);
// destroy the temporary resources
j2d_glXMakeContextCurrent(awt_display, None, None, NULL);
j2d_glXDestroyPbuffer(awt_display, glxpbuffer);
j2d_glXDestroyContext(awt_display, context);
// invalidate the current context
OGLContext_InvalidateCurrentContext(env);
J2dTraceLn(J2D_TRACE_VERBOSE, "finished with temporary pbuffer/context");
J2dTraceLn1(J2D_TRACE_INFO, "OpenGL version: %s", versionstr);
if (!OGLContext_IsVersionSupported(versionstr)) {
J2dTraceLn(J2D_TRACE_ERROR, "invalid OpenGL version; 1.2 is required");
free(glxinfo);
return 0;
}
J2dTraceLn(J2D_TRACE_VERBOSE,
"successfully finished checking dependencies");
j2d_glXGetFBConfigAttrib(awt_display, fbconfig, GLX_DOUBLEBUFFER, &db);
glxinfo->screen = screennum;
glxinfo->visual = visnum;
glxinfo->fbconfig = fbconfig;
glxinfo->isDoubleBuffered = db;
// create the single shared context (if it hasn't been created already)
if (sharedContext == NULL) {
if (GLXGC_InitSharedContext(env, glxinfo) == SD_FAILURE) {
J2dTraceLn(J2D_TRACE_ERROR, "could not init shared context");
free(glxinfo);
return 0;
}
}
return ptr_to_jlong(glxinfo);
}
/**
* Initializes a new OGLContext, which includes the native GLXContext handle
* and some other important information such as the associated GLXFBConfig.
* If sharedctx is non-null, its texture objects will be shared with the newly
* created GLXContext. If useDisposer is JNI_TRUE, a new DisposerTarget
* (with the current Java-level thread object as the referent) will be
* created and enqueued in the Disposer, so that this OGLContext will be
* disposed of properly when its associated thread exits. Contexts that are
* intended to remain for the lifetime of the app (such as the sharedContext)
* should specify JNI_FALSE for useDisposer.
*/
OGLContext *
GLXGC_InitOGLContext(JNIEnv *env, GLXGraphicsConfigInfo *glxinfo,
GLXContext sharedctx, jboolean useDisposer)
{
OGLContext *oglc;
GLXCtxInfo *ctxinfo;
GLXFBConfig fbconfig;
GLXContext context;
static jboolean firstTime = JNI_TRUE;
J2dTraceLn(J2D_TRACE_INFO, "in GLXGC_InitOGLContext");
oglc = (OGLContext *)malloc(sizeof(OGLContext));
if (oglc == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "could not allocate memory for oglc");
return NULL;
}
memset(oglc, 0, sizeof(OGLContext));
ctxinfo = (GLXCtxInfo *)malloc(sizeof(GLXCtxInfo));
if (ctxinfo == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "could not allocate memory for ctxinfo");
free(oglc);
return NULL;
}
fbconfig = GLXGC_InitFBConfig(env, glxinfo->screen, glxinfo->visual);
if (fbconfig == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create new GLX fbconfig");
free(oglc);
free(ctxinfo);
return NULL;
}
// REMIND: we cannot rely on direct contexts when rendering to pixmaps
context = j2d_glXCreateNewContext(awt_display, fbconfig,
GLX_RGBA_TYPE, sharedctx, GL_TRUE);
if (context == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create new GLX context");
free(oglc);
free(ctxinfo);
return NULL;
}
ctxinfo->fbconfig = fbconfig;
ctxinfo->context = context;
oglc->ctxInfo = ctxinfo;
oglc->extInfo = &glxinfo->extInfo;
// initialize this value to 1.0f as it is sometimes used when uploading
// textures (see OGLBlitLoops_Blit()), and in the case of the shared
// context, we skip the InitComposite() step that would otherwise
// initialize the oglc->extraAlpha value...
oglc->extraAlpha = 1.0f;
/**
* REMIND: The following is a total hack. The first time we enter
* this method, we must be on the main thread attempting to initialize
* the default GraphicsConfig. Each time we enter this method, we would
* like to upcall to the static EventQueue.isDispatchThread() method.
* But the first time we call that static method, we may end up implicitly
* loading MToolkit, which will also attempt to call getDefaultConfig().
* But since we still haven't fully initialized the default config, we
* re-enter the getDefaultConfig() method (in the same thread), and then
* come down through this same method. JNI doesn't seem to like this
* situation, and we end up with a seg fault. This may be a JNI bug,
* but for now we'll work around it, by avoiding the upcall the first
* time around. After that, we should be able to make this upcall without
* the nasty side effects.
*/
if (firstTime) {
oglc->onJED = JNI_FALSE;
firstTime = JNI_FALSE;
} else {
oglc->onJED = JNU_CallStaticMethodByName(env, NULL,
"java/awt/EventQueue",
"isDispatchThread",
"()Z").z;
}
if (useDisposer) {
// initialize a new Disposer target (when the Java-level thread object
// is about to go away, Disposer will invoke our native dispose
// method, which destroys this OGLContext and its associated entries)
jobject thread = awtJNI_GetCurrentThread(env);
if (thread == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "could not fetch current thread");
free(oglc);
free(ctxinfo);
return NULL;
}
Disposer_AddRecord(env, thread,
GLXGC_DisposeOGLContext, ptr_to_jlong(oglc));
}
return oglc;
}
/**
* Determines whether the GLX pipeline can be used for a given GraphicsConfig
* provided its screen number and visual ID. If the minimum requirements are
* met, the native GLXGraphicsConfigInfo structure is initialized for this
* GraphicsConfig with the necessary information (GLXFBConfig, etc.)
* and a pointer to this structure is returned as a jlong. If
* initialization fails at any point, zero is returned, indicating that GLX
* cannot be used for this GraphicsConfig (we should fallback on the existing
* X11 pipeline).
*/
JNIEXPORT jlong JNICALL
Java_sun_java2d_opengl_GLXGraphicsConfig_getGLXConfigInfo(JNIEnv *env,
jclass glxgc,
jint screennum,
jint visnum)
{
#ifndef HEADLESS
OGLContext *oglc;
GLXFBConfig fbconfig;
GLXContext context;
GLXPbuffer scratch;
GLXGraphicsConfigInfo *glxinfo;
jint caps = CAPS_EMPTY;
int db, alpha;
const unsigned char *versionstr;
J2dRlsTraceLn(J2D_TRACE_INFO, "GLXGraphicsConfig_getGLXConfigInfo");
if (usingXinerama) {
// when Xinerama is enabled, the screen ID needs to be 0
screennum = 0;
}
fbconfig = GLXGC_InitFBConfig(env, screennum, (VisualID)visnum);
if (fbconfig == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: could not create fbconfig");
return 0L;
}
if (sharedContext == 0) {
// create the one shared context
sharedContext = j2d_glXCreateNewContext(awt_display, fbconfig,
GLX_RGBA_TYPE, 0, GL_TRUE);
if (sharedContext == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: could not create shared context");
return 0L;
}
}
// create the GLXContext for this GLXGraphicsConfig
context = j2d_glXCreateNewContext(awt_display, fbconfig,
GLX_RGBA_TYPE, sharedContext,
GL_TRUE);
if (context == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: could not create GLX context");
return 0L;
}
// this is pretty sketchy, but it seems to be the easiest way to create
// some form of GLXDrawable using only the display and a GLXFBConfig
// (in order to make the context current for checking the version,
// extensions, etc)...
scratch = GLXGC_InitScratchPbuffer(fbconfig);
if (scratch == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: could not create scratch pbuffer");
j2d_glXDestroyContext(awt_display, context);
return 0L;
}
// the context must be made current before we can query the
// version and extension strings
j2d_glXMakeContextCurrent(awt_display, scratch, scratch, context);
#ifdef __sparc
/*
* 6438225: The software rasterizer used by Sun's OpenGL libraries
* for certain boards has quality issues, and besides, performance
* of these boards is not high enough to justify the use of the
* OpenGL-based Java 2D pipeline. If we detect one of the following
* boards via the GL_RENDERER string, just give up:
* - FFB[2[+]] ("Creator[3D]")
* - PGX-series ("m64")
* - AFB ("Elite3D")
*/
{
const char *renderer = (const char *)j2d_glGetString(GL_RENDERER);
J2dRlsTraceLn1(J2D_TRACE_VERBOSE,
"GLXGraphicsConfig_getGLXConfigInfo: detected renderer (%s)",
(renderer == NULL) ? "null" : renderer);
if (renderer == NULL ||
strncmp(renderer, "Creator", 7) == 0 ||
strncmp(renderer, "SUNWm64", 7) == 0 ||
strncmp(renderer, "Elite", 5) == 0)
{
J2dRlsTraceLn1(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: unsupported board (%s)",
(renderer == NULL) ? "null" : renderer);
j2d_glXMakeContextCurrent(awt_display, None, None, NULL);
j2d_glXDestroyPbuffer(awt_display, scratch);
j2d_glXDestroyContext(awt_display, context);
return 0L;
}
}
#endif /* __sparc */
versionstr = j2d_glGetString(GL_VERSION);
OGLContext_GetExtensionInfo(env, &caps);
// destroy the temporary resources
j2d_glXMakeContextCurrent(awt_display, None, None, NULL);
J2dRlsTraceLn1(J2D_TRACE_INFO,
"GLXGraphicsConfig_getGLXConfigInfo: OpenGL version=%s",
(versionstr == NULL) ? "null" : (char *)versionstr);
if (!OGLContext_IsVersionSupported(versionstr)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: OpenGL 1.2 is required");
j2d_glXDestroyPbuffer(awt_display, scratch);
j2d_glXDestroyContext(awt_display, context);
return 0L;
}
// get config-specific capabilities
j2d_glXGetFBConfigAttrib(awt_display, fbconfig, GLX_DOUBLEBUFFER, &db);
if (db) {
caps |= CAPS_DOUBLEBUFFERED;
}
j2d_glXGetFBConfigAttrib(awt_display, fbconfig, GLX_ALPHA_SIZE, &alpha);
if (alpha > 0) {
caps |= CAPS_STORED_ALPHA;
}
// initialize the OGLContext, which wraps the GLXFBConfig and GLXContext
oglc = GLXGC_InitOGLContext(fbconfig, context, scratch, caps);
if (oglc == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: could not create oglc");
j2d_glXDestroyPbuffer(awt_display, scratch);
j2d_glXDestroyContext(awt_display, context);
return 0L;
}
J2dTraceLn(J2D_TRACE_VERBOSE,
"GLXGraphicsConfig_getGLXConfigInfo: finished checking dependencies");
// create the GLXGraphicsConfigInfo record for this config
glxinfo = (GLXGraphicsConfigInfo *)malloc(sizeof(GLXGraphicsConfigInfo));
if (glxinfo == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"GLXGraphicsConfig_getGLXConfigInfo: could not allocate memory for glxinfo");
GLXGC_DestroyOGLContext(oglc);
return 0L;
}
glxinfo->screen = screennum;
glxinfo->visual = visnum;
glxinfo->context = oglc;
glxinfo->fbconfig = fbconfig;
return ptr_to_jlong(glxinfo);
#else
return 0L;
#endif /* !HEADLESS */
}