/**
* 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);
}
/**
* 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).
*/
static jlong
WGLGC_GetWGLConfigInfo(JNIEnv *env, jint screennum, jint pixfmt)
{
PIXELFORMATDESCRIPTOR pfd;
HWND hwnd;
HDC hdc;
HGLRC context;
WGLGraphicsConfigInfo *wglinfo;
const unsigned char *versionstr;
const char *extstr;
int attr[] = { WGL_DOUBLE_BUFFER_ARB, 0 };
int db;
J2dTraceLn(J2D_TRACE_INFO, "in WGLGC_GetWGLConfigInfo");
// initialize GL/WGL extension functions
if (!WGLGC_InitExtFuncs(screennum)) {
J2dTraceLn(J2D_TRACE_ERROR, "could not initialize extension funcs");
return 0L;
}
// create the WGLGraphicsConfigInfo record for this config
wglinfo = (WGLGraphicsConfigInfo *)malloc(sizeof(WGLGraphicsConfigInfo));
if (wglinfo == NULL) {
J2dTraceLn(J2D_TRACE_ERROR, "could not allocate memory for wglinfo");
return 0L;
}
// create a scratch window
hwnd = WGLGC_CreateScratchWindow(screennum);
if (hwnd == 0) {
free(wglinfo);
return 0L;
}
// 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);
free(wglinfo);
return 0L;
}
if (pixfmt == 0) {
// find an appropriate pixel format
pixfmt = WGLGC_GetPixelFormatForDC(hdc);
if (pixfmt == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not find appropriate pixfmt");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
free(wglinfo);
return 0L;
}
}
// set the pixel format for the scratch window
if (!SetPixelFormat(hdc, pixfmt, &pfd)) {
J2dTraceLn(J2D_TRACE_ERROR, "error setting pixel format");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
free(wglinfo);
return 0L;
}
// create a temporary context
context = j2d_wglCreateContext(hdc);
if (context == 0) {
J2dTraceLn(J2D_TRACE_ERROR, "could not create temp WGL context");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
free(wglinfo);
return 0L;
}
// make the context current so that we can query the OpenGL version
// and extension strings
if (!j2d_wglMakeCurrent(hdc, context)) {
J2dTraceLn(J2D_TRACE_ERROR, "could not make temp context current");
j2d_wglDeleteContext(context);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
free(wglinfo);
return 0L;
}
// invalidate the current context
OGLContext_InvalidateCurrentContext(env);
// get version and extension strings
versionstr = j2d_glGetString(GL_VERSION);
extstr = j2d_wglGetExtensionsStringARB(hdc);
OGLContext_GetExtensionInfo(&wglinfo->extInfo);
J2dTraceLn1(J2D_TRACE_INFO, "OpenGL version: %s", versionstr);
if (!OGLContext_IsVersionSupported(versionstr)) {
J2dTraceLn(J2D_TRACE_ERROR, "invalid OpenGL version; 1.2 is required");
j2d_wglMakeCurrent(NULL, NULL);
j2d_wglDeleteContext(context);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
free(wglinfo);
return 0L;
}
// check for required WGL extensions
if (!OGLContext_IsExtensionAvailable(extstr, "WGL_ARB_pbuffer") ||
!OGLContext_IsExtensionAvailable(extstr, "WGL_ARB_render_texture") ||
!OGLContext_IsExtensionAvailable(extstr, "WGL_ARB_pixel_format"))
{
J2dTraceLn(J2D_TRACE_ERROR, "required extension(s) not available");
j2d_wglMakeCurrent(NULL, NULL);
j2d_wglDeleteContext(context);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
free(wglinfo);
return 0L;
}
// check whether pixel format is double buffered
j2d_wglGetPixelFormatAttribivARB(hdc, pixfmt, 0, 1, attr, &db);
// destroy the temporary resources
j2d_wglMakeCurrent(NULL, NULL);
j2d_wglDeleteContext(context);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
J2dTraceLn(J2D_TRACE_VERBOSE,
"successfully finished checking dependencies");
wglinfo->screen = screennum;
wglinfo->pixfmt = pixfmt;
wglinfo->isDoubleBuffered = db;
// create the single shared context (if it hasn't been created already)
if (sharedContext == NULL) {
if (WGLGC_InitSharedContext(env, wglinfo) == SD_FAILURE) {
J2dTraceLn(J2D_TRACE_ERROR, "could not init shared context");
free(wglinfo);
return 0L;
}
}
return ptr_to_jlong(wglinfo);
}
/**
* Returns a pixel format identifier that is suitable for Java 2D's needs
* (must have a depth buffer, support for pbuffers, etc). This method will
* iterate through all pixel formats (if any) that match the requested
* attributes and will attempt to find a pixel format with a minimal combined
* depth+stencil buffer. Note that we currently only need depth capabilities
* (for shape clipping purposes), but wglChoosePixelFormatARB() will often
* return a list of pixel formats with the largest depth buffer (and stencil)
* sizes at the top of the list. Therefore, we scan through the whole list
* to find the most VRAM-efficient pixel format. If no appropriate pixel
* format can be found, this method returns 0.
*/
static int
WGLGC_GetPixelFormatForDC(HDC hdc)
{
int attrs[] = {
WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
WGL_DRAW_TO_PBUFFER_ARB, GL_TRUE,
WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
WGL_DEPTH_BITS_ARB, 16, // anything >= 16 will work for us
0
};
int pixfmts[32];
int chosenPixFmt = 0;
int nfmts, i;
// this is the initial minimum value for the combined depth+stencil size
// (we initialize it to some absurdly high value; realistic values will
// be much less than this number)
int minDepthPlusStencil = 512;
J2dRlsTraceLn(J2D_TRACE_INFO, "WGLGC_GetPixelFormatForDC");
// find all pixel formats (maximum of 32) with the provided attributes
if (!j2d_wglChoosePixelFormatARB(hdc, attrs, NULL, 32, pixfmts, &nfmts)) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGC_GetPixelFormatForDC: error choosing pixel format");
return 0;
}
if (nfmts <= 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGC_GetPixelFormatForDC: no pixel formats found");
return 0;
}
J2dRlsTraceLn(J2D_TRACE_VERBOSE, " candidate pixel formats:");
// iterate through the list of pixel formats, looking for the one that
// meets our requirements while keeping the combined depth+stencil sizes
// to a minimum
for (i = 0; i < nfmts; i++) {
int attrKeys[] = {
WGL_DEPTH_BITS_ARB, WGL_STENCIL_BITS_ARB,
WGL_DOUBLE_BUFFER_ARB, WGL_ALPHA_BITS_ARB
};
int attrVals[4];
int pixfmt = pixfmts[i];
int depth, stencil, db, alpha;
j2d_wglGetPixelFormatAttribivARB(hdc, pixfmt, 0, 4,
attrKeys, attrVals);
depth = attrVals[0];
stencil = attrVals[1];
db = attrVals[2];
alpha = attrVals[3];
J2dRlsTrace5(J2D_TRACE_VERBOSE,
"[V] pixfmt=%d db=%d alpha=%d depth=%d stencil=%d valid=",
pixfmt, db, alpha, depth, stencil);
if ((depth + stencil) < minDepthPlusStencil) {
J2dRlsTrace(J2D_TRACE_VERBOSE, "true\n");
minDepthPlusStencil = depth + stencil;
chosenPixFmt = pixfmt;
} else {
J2dRlsTrace(J2D_TRACE_VERBOSE, "false (large depth)\n");
}
}
if (chosenPixFmt == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLGC_GetPixelFormatForDC: could not find appropriate pixfmt");
return 0;
}
J2dRlsTraceLn1(J2D_TRACE_INFO,
"WGLGC_GetPixelFormatForDC: chose %d as the best pixel format",
chosenPixFmt);
return chosenPixFmt;
}
JNIEXPORT jboolean JNICALL
Java_sun_java2d_opengl_WGLSurfaceData_initPbuffer
(JNIEnv *env, jobject wglsd,
jlong pData, jlong pConfigInfo,
jboolean isOpaque,
jint width, jint height)
{
int attrKeys[] = {
WGL_MAX_PBUFFER_WIDTH_ARB,
WGL_MAX_PBUFFER_HEIGHT_ARB,
};
int attrVals[2];
int pbAttrList[] = { 0 };
OGLSDOps *oglsdo = (OGLSDOps *)jlong_to_ptr(pData);
WGLGraphicsConfigInfo *wglInfo =
(WGLGraphicsConfigInfo *)jlong_to_ptr(pConfigInfo);
WGLSDOps *wglsdo;
HWND hwnd;
HDC hdc, pbufferDC;
HPBUFFERARB pbuffer;
int maxWidth, maxHeight;
int actualWidth, actualHeight;
J2dTraceLn3(J2D_TRACE_INFO,
"WGLSurfaceData_initPbuffer: w=%d h=%d opq=%d",
width, height, isOpaque);
if (oglsdo == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: ops are null");
return JNI_FALSE;
}
wglsdo = (WGLSDOps *)oglsdo->privOps;
if (wglsdo == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: wgl ops are null");
return JNI_FALSE;
}
if (wglInfo == NULL) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: wgl config info is null");
return JNI_FALSE;
}
// create a scratch window
hwnd = WGLGC_CreateScratchWindow(wglInfo->screen);
if (hwnd == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: could not create scratch window");
return JNI_FALSE;
}
// get the HDC for the scratch window
hdc = GetDC(hwnd);
if (hdc == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: could not get dc for scratch window");
DestroyWindow(hwnd);
return JNI_FALSE;
}
// get the maximum allowable pbuffer dimensions
j2d_wglGetPixelFormatAttribivARB(hdc, wglInfo->pixfmt, 0, 2,
attrKeys, attrVals);
maxWidth = attrVals[0];
maxHeight = attrVals[1];
J2dTraceLn4(J2D_TRACE_VERBOSE,
" desired pbuffer dimensions: w=%d h=%d maxw=%d maxh=%d",
width, height, maxWidth, maxHeight);
// if either dimension is 0 or larger than the maximum, we cannot
// allocate a pbuffer with the requested dimensions
if (width == 0 || width > maxWidth ||
height == 0 || height > maxHeight)
{
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: invalid dimensions");
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
return JNI_FALSE;
}
pbuffer = j2d_wglCreatePbufferARB(hdc, wglInfo->pixfmt,
width, height, pbAttrList);
ReleaseDC(hwnd, hdc);
DestroyWindow(hwnd);
if (pbuffer == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: could not create wgl pbuffer");
return JNI_FALSE;
}
// note that we get the DC for the pbuffer at creation time, and then
// release the DC when the pbuffer is disposed; the WGL_ARB_pbuffer
// spec is vague about such things, but from past experience we know
// this approach to be more robust than, for example, doing a
// Get/ReleasePbufferDC() everytime we make a context current
pbufferDC = j2d_wglGetPbufferDCARB(pbuffer);
if (pbufferDC == 0) {
J2dRlsTraceLn(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: could not get dc for pbuffer");
j2d_wglDestroyPbufferARB(pbuffer);
return JNI_FALSE;
}
// make sure the actual dimensions match those that we requested
j2d_wglQueryPbufferARB(pbuffer, WGL_PBUFFER_WIDTH_ARB, &actualWidth);
j2d_wglQueryPbufferARB(pbuffer, WGL_PBUFFER_HEIGHT_ARB, &actualHeight);
if (width != actualWidth || height != actualHeight) {
J2dRlsTraceLn2(J2D_TRACE_ERROR,
"WGLSurfaceData_initPbuffer: actual (w=%d h=%d) != requested",
actualWidth, actualHeight);
j2d_wglReleasePbufferDCARB(pbuffer, pbufferDC);
j2d_wglDestroyPbufferARB(pbuffer);
return JNI_FALSE;
}
oglsdo->drawableType = OGLSD_PBUFFER;
oglsdo->isOpaque = isOpaque;
oglsdo->width = width;
oglsdo->height = height;
wglsdo->pbuffer = pbuffer;
wglsdo->pbufferDC = pbufferDC;
OGLSD_SetNativeDimensions(env, oglsdo, width, height);
return JNI_TRUE;
}