/**
* Initializes the shared context and shared surface.
*/
static jint
WGLGC_InitSharedContext(JNIEnv *env, WGLGraphicsConfigInfo *wglinfo)
{
HWND hwnd;
HDC hdc;
J2dTraceLn(J2D_TRACE_INFO, "in WGLGC_InitSharedContext");
sharedContext = WGLGC_InitOGLContext(env, wglinfo, JNI_FALSE);
if (sharedContext == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create shared context");
return SD_FAILURE;
}
hwnd = WGLGC_CreateScratchWindow(wglinfo->screen);
if (hwnd == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create scratch window");
return SD_FAILURE;
}
// get the HDC for the scratch window
hdc = GetDC(hwnd);
if (hdc == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not get dc for scratch window");
DestroyWindow(hwnd);
return SD_FAILURE;
}
sharedSurface = j2d_wglCreatePbufferARB(hdc, wglinfo->pixfmt,
1, 1, NULL);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
if (sharedSurface == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create shared surface");
WGLGC_DestroyOGLContext(env, sharedContext);
sharedContext = NULL;
return SD_FAILURE;
}
sharedSurfaceDC = j2d_wglGetPbufferDCARB(sharedSurface);
if (sharedSurfaceDC == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not get hdc for shared pbuffer");
WGLGC_DestroyOGLContext(env, sharedContext);
sharedContext = NULL;
j2d_wglDestroyPbufferARB(sharedSurface);
sharedSurface = 0;
return SD_FAILURE;
}
sharedConfigInfo = wglinfo;
return SD_SUCCESS;
}
JNIEXPORT jlong JNICALL
Java_sun_java2d_opengl_WGLGraphicsConfig_initNativeSharedContext
(JNIEnv *env, jobject wglsd)
{
OGLContext *oglc;
J2dTraceLn(J2D_TRACE_INFO,
"in WGLGraphicsConfig_initNativeSharedContext");
if (sharedContext == NULL || sharedConfigInfo == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "shared context not yet inited");
return 0L;
}
oglc = WGLGC_InitOGLContext(env, sharedConfigInfo, JNI_TRUE);
if (oglc == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create native shared context");
return 0L;
}
return ptr_to_jlong(oglc);
}
/**
* Determines whether the WGL pipeline can be used for a given GraphicsConfig
* provided its screen number and visual ID. If the minimum requirements are
* met, the native WGLGraphicsConfigInfo structure is initialized for this
* GraphicsConfig with the necessary information (pixel format, etc.)
* and a pointer to this structure is returned as a jlong. If
* initialization fails at any point, zero is returned, indicating that WGL
* cannot be used for this GraphicsConfig (we should fallback on the existing
* DX pipeline).
*/
JNIEXPORT jlong JNICALL
Java_sun_java2d_opengl_WGLGraphicsConfig_getWGLConfigInfo(JNIEnv *env,
jclass wglgc,
jint screennum,
jint pixfmt)
{
OGLContext *oglc;
PIXELFORMATDESCRIPTOR pfd;
HWND hwnd;
HDC hdc;
HGLRC context;
HPBUFFERARB scratch;
HDC scratchDC;
WGLGraphicsConfigInfo *wglinfo;
const unsigned char *versionstr;
const char *extstr;
jint caps = CAPS_EMPTY;
int attrKeys[] = { WGL_DOUBLE_BUFFER_ARB, WGL_ALPHA_BITS_ARB };
int attrVals[2];
J2dRlsTraceLn(J2D_TRACE_INFO, "WGLGraphicsConfig_getWGLConfigInfo");
// initialize GL/WGL extension functions
if (!WGLGC_InitExtFuncs(screennum)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not init ext funcs");
return 0L;
}
// create a scratch window
hwnd = WGLGC_CreateScratchWindow(screennum);
if (hwnd == 0) {
return 0L;
}
// get the HDC for the scratch window
hdc = GetDC(hwnd);
if (hdc == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not get dc for scratch window");
DestroyWindow(hwnd);
return 0L;
}
if (pixfmt == 0) {
// find an appropriate pixel format
pixfmt = WGLGC_GetPixelFormatForDC(hdc);
if (pixfmt == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not find appropriate pixfmt");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return 0L;
}
}
if (sharedContext == 0) {
// create the one shared context
sharedContext = WGLGC_CreateContext(screennum, pixfmt);
if (sharedContext == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not create shared context");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return 0L;
}
}
// set the pixel format for the scratch window
if (!SetPixelFormat(hdc, pixfmt, &pfd)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsconfig_getWGLConfigInfo: error setting pixel format");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return 0L;
}
// create the HGLRC (context) for this WGLGraphicsConfig
context = j2d_wglCreateContext(hdc);
if (context == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not create WGL context");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return 0L;
}
// REMIND: when using wglShareLists, the two contexts must use an
// identical pixel format...
if (!j2d_wglShareLists(sharedContext, context)) {
J2dRlsTraceLn(J2D_TRACE_WARNING,
"WGLGraphicsConfig_getWGLConfigInfo: unable to share lists");
}
// make the context current so that we can query the OpenGL version
// and extension strings
if (!j2d_wglMakeCurrent(hdc, context)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not make temp context current");
j2d_wglDeleteContext(context);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return 0L;
}
// get version and extension strings
versionstr = j2d_glGetString(GL_VERSION);
extstr = j2d_wglGetExtensionsStringARB(hdc);
OGLContext_GetExtensionInfo(env, &caps);
J2dRlsTraceLn1(J2D_TRACE_INFO,
"WGLGraphicsConfig_getWGLConfigInfo: OpenGL version=%s",
(versionstr == NULL) ? "null" : (char *)versionstr);
if (!OGLContext_IsVersionSupported(versionstr)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: OpenGL 1.2 is required");
j2d_wglMakeCurrent(NULL, NULL);
j2d_wglDeleteContext(context);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return 0L;
}
// check for required WGL extensions
if (!OGLContext_IsExtensionAvailable(extstr, "WGL_ARB_pbuffer") ||
!OGLContext_IsExtensionAvailable(extstr, "WGL_ARB_make_current_read")||
!OGLContext_IsExtensionAvailable(extstr, "WGL_ARB_pixel_format"))
{
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: required ext(s) unavailable");
j2d_wglMakeCurrent(NULL, NULL);
j2d_wglDeleteContext(context);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return 0L;
}
// get config-specific capabilities
j2d_wglGetPixelFormatAttribivARB(hdc, pixfmt, 0, 2, attrKeys, attrVals);
if (attrVals[0]) {
caps |= CAPS_DOUBLEBUFFERED;
}
if (attrVals[1] > 0) {
caps |= CAPS_STORED_ALPHA;
}
// create the scratch pbuffer
scratch = j2d_wglCreatePbufferARB(hdc, pixfmt, 1, 1, NULL);
// destroy the temporary resources
j2d_wglMakeCurrent(NULL, NULL);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
if (scratch == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not create scratch surface");
j2d_wglDeleteContext(context);
return 0L;
}
// get the HDC for the scratch pbuffer
scratchDC = j2d_wglGetPbufferDCARB(scratch);
if (scratchDC == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not get hdc for scratch surface");
j2d_wglDeleteContext(context);
j2d_wglDestroyPbufferARB(scratch);
return 0L;
}
// initialize the OGLContext, which wraps the pixfmt and HGLRC (context)
oglc = WGLGC_InitOGLContext(pixfmt, context, scratch, scratchDC, caps);
if (oglc == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not create oglc");
j2d_wglDeleteContext(context);
j2d_wglReleasePbufferDCARB(scratch, scratchDC);
j2d_wglDestroyPbufferARB(scratch);
return 0L;
}
J2dTraceLn(J2D_TRACE_VERBOSE,
"WGLGraphicsConfig_getWGLConfigInfo: finished checking dependencies");
// create the WGLGraphicsConfigInfo record for this config
wglinfo = (WGLGraphicsConfigInfo *)malloc(sizeof(WGLGraphicsConfigInfo));
if (wglinfo == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGraphicsConfig_getWGLConfigInfo: could not allocate memory for wglinfo");
WGLGC_DestroyOGLContext(oglc);
return 0L;
}
wglinfo->screen = screennum;
wglinfo->pixfmt = pixfmt;
wglinfo->context = oglc;
return ptr_to_jlong(wglinfo);
}
