void COffscreenGLContext::WorkerThreadPost()
{
CGLSetCurrentContext(cglWorkerCtx);
}
void COffscreenGLContext::WorkerThreadFree()
{
CGLSetCurrentContext(NULL);
CGLDestroyContext(cglWorkerCtx);
}
i_img *
imss_darwin(i_img_dim left, i_img_dim top, i_img_dim right, i_img_dim bottom) {
CGDisplayCount count;
CGDisplayErr err;
CGRect rect;
CGLPixelFormatObj pix;
GLint npix;
CGLContextObj ctx;
i_img *im;
CGDirectDisplayID disp;
i_img_dim screen_width, screen_height;
i_img_dim width, height;
CGLPixelFormatAttribute pix_attrs[] =
{
kCGLPFADisplayMask, 0, /* filled in later */
kCGLPFAColorSize, 24,
kCGLPFAAlphaSize, 0,
kCGLPFAFullScreen,
0
};
i_clear_error();
disp = CGMainDisplayID();
if (!disp) {
i_push_error(0, "No main display");
return NULL;
}
/* for now, only interested in the first display */
rect = CGDisplayBounds(disp);
screen_width = rect.size.width;
screen_height = rect.size.height;
/* adjust negative/zero values to window size */
if (left < 0)
left += screen_width;
if (top < 0)
top += screen_height;
if (right <= 0)
right += screen_width;
if (bottom <= 0)
bottom += screen_height;
/* clamp */
if (left < 0)
left = 0;
if (right > screen_width)
right = screen_width;
if (top < 0)
top = 0;
if (bottom > screen_height)
bottom = screen_height;
/* validate */
if (right <= left || bottom <= top) {
i_push_error(0, "image would be empty");
return NULL;
}
width = right - left;
height = bottom - top;
/* select a pixel format */
pix_attrs[1] = CGDisplayIDToOpenGLDisplayMask(disp);
err = CGLChoosePixelFormat(pix_attrs, &pix, &npix);
if (err) {
i_push_errorf(err, "CGLChoosePixelFormat: %d", (int)err);
return NULL;
}
if (!npix) {
i_push_error(0, "No pixel format found - hidden display?");
return NULL;
}
/* make ourselves a context */
err = CGLCreateContext(pix, NULL, &ctx);
CGLDestroyPixelFormat(pix);
if (err) {
i_push_errorf(err, "CGLCreateContext: %d", (int)err);
return NULL;
}
err = CGLSetCurrentContext(ctx);
if (err) {
i_push_errorf(err, "CGLSetCurrentContext: %d", (int)err);
return NULL;
}
err = CGLSetFullScreen(ctx);
if (err) {
i_push_errorf(err, "CGLSetFullScreen: %d", (int)err);
return NULL;
}
/* capture */
im = i_img_8_new(width, height, 3);
if (im) {
size_t line_size = width * 4;
size_t buf_size = line_size * height;
unsigned char *buf = malloc(buf_size);
i_img_dim y = height - 1;
i_color *bufp = (i_color *)buf; /* hackish */
/* GL has the vertical axis going from bottom to top, so translate it */
glReadBuffer(GL_FRONT);
glReadPixels(left, screen_height - top - height, width, height,
GL_RGBA, GL_UNSIGNED_BYTE, buf);
/* transfer */
while (y >= 0) {
i_plin(im, 0, width, y, bufp);
bufp += width;
--y;
}
free(buf);
i_tags_setn(&im->tags, "ss_window_width", width);
i_tags_setn(&im->tags, "ss_window_height", height);
i_tags_set(&im->tags, "ss_type", "Darwin", 6);
i_tags_setn(&im->tags, "ss_left", left);
i_tags_setn(&im->tags, "ss_top", top);
}
/* clean up */
CGLSetCurrentContext(NULL);
CGLDestroyContext(ctx);
return im;
}
BOOL LLWindowMacOSX::createContext(int x, int y, int width, int height, int bits, BOOL fullscreen, BOOL disable_vsync)
{
BOOL glNeedsInit = FALSE;
mFullscreen = fullscreen;
if (mWindow == NULL)
{
mWindow = getMainAppWindow();
}
if(mContext == NULL)
{
// Our OpenGL view is already defined within SecondLife.xib.
// Get the view instead.
mGLView = createOpenGLView(mWindow, mFSAASamples, !disable_vsync);
mContext = getCGLContextObj(mGLView);
// Since we just created the context, it needs to be set up.
glNeedsInit = TRUE;
gGLManager.mVRAM = getVramSize(mGLView);
}
// This sets up our view to recieve text from our non-inline text input window.
setupInputWindow(mWindow, mGLView);
// Hook up the context to a drawable
if(mContext != NULL)
{
// <FS:CR> Mac OpenGL
//U32 err = CGLSetCurrentContext(mContext);
CGLError err = CGLSetCurrentContext(mContext);
if (err != kCGLNoError)
{
setupFailure("Can't activate GL rendering context", "Error", OSMB_OK);
return FALSE;
}
}
// Disable vertical sync for swap
GLint frames_per_swap = 0;
if (disable_vsync)
{
frames_per_swap = 0;
}
else
{
frames_per_swap = 1;
}
CGLSetParameter(mContext, kCGLCPSwapInterval, &frames_per_swap);
//enable multi-threaded OpenGL
if (sUseMultGL)
{
CGLError cgl_err;
CGLContextObj ctx = CGLGetCurrentContext();
cgl_err = CGLEnable( ctx, kCGLCEMPEngine);
if (cgl_err != kCGLNoError )
{
LL_DEBUGS("GLInit") << "Multi-threaded OpenGL not available." << LL_ENDL;
}
else
{
LL_DEBUGS("GLInit") << "Multi-threaded OpenGL enabled." << LL_ENDL;
}
}
makeFirstResponder(mWindow, mGLView);
return TRUE;
}
/*
PsychOSOpenOnscreenWindow()
Creates the CGL pixel format and the CGL context objects and then instantiates the context onto the screen.
-The pixel format and the context are stored in the target specific field of the window recored. Close
should clean up by destroying both the pixel format and the context.
-We mantain the context because it must be be made the current context by drawing functions to draw into
the specified window.
-We maintain the pixel format object because there seems to be now way to retrieve that from the context.
-To tell the caller to clean up PsychOSOpenOnscreenWindow returns FALSE if we fail to open the window. It
would be better to just issue an PsychErrorExit() and have that clean up everything allocated outside of
PsychOpenOnscreenWindow().
MK: The new option 'stereomode' allows selection of stereo display instead of mono display:
0 (default) == Old behaviour -> Monoscopic rendering context.
>0 == Stereo display, where the number defines the type of stereo algorithm to use.
=1 == Use OpenGL built-in stereo by creating a context/window with left- and right backbuffer. This is
the only mode of interest here, as it requires use of a stereo capable OpenGL pixelformat. All other
stereo modes are implemented by PTB itself in a platform independent manner on top of a standard mono
context.
*/
psych_bool PsychOSOpenOnscreenWindow(PsychScreenSettingsType *screenSettings, PsychWindowRecordType *windowRecord, int numBuffers, int stereomode, int conserveVRAM)
{
CGOpenGLDisplayMask displayMask;
CGLError error;
CGDirectDisplayID cgDisplayID;
CGLPixelFormatAttribute attribs[40];
int attribcount;
GLint numVirtualScreens;
GLenum glerr;
PsychRectType screenrect;
int i;
int windowLevel;
long scw, sch;
void* cocoaWindow = NULL;
// Map screen number to physical display handle cgDisplayID:
PsychGetCGDisplayIDFromScreenNumber(&cgDisplayID, screenSettings->screenNumber);
displayMask = CGDisplayIDToOpenGLDisplayMask(cgDisplayID);
// NULL-out Cocoa window handle, so this is well-defined in case of error:
windowRecord->targetSpecific.windowHandle = NULL;
// Retrieve windowLevel, an indicator of where non-CGL / non-fullscreen windows should
// be located wrt. to other windows. -2 = Allow regular window manager control of stacking
// order, visibility etc., -1 = Invisible/hidden, 0 = Behind everything else, occluded by
// everything else. 1 - 999 = At layer 'windowLevel' -> Occludes stuff on layers "below" it.
// 1000 - 1999 = At highest level, but partially translucent / alpha channel allows to make
// regions transparent. Range 1000 - 1499 = transparent for mouse and keyboard, alpha 0-99.99%,
// 1500-1599 = opaque for mouse and keyboard, alpha 0-99.99%, 2000 or higher: Above everything,
// fully opaque, occludes everything, a typical fullscreen onscreen window. 2000 is the default.
windowLevel = PsychPrefStateGet_WindowShieldingLevel();
// Window rect provided which has same size as screen?
// We do not use windowed mode if the provided window rectangle either
// matches the target screens rectangle (and therefore its exact size)
// or its screens global rectangle. In such cases we use CGL for better
// low level control and to exclude the desktop compositor from interfering:
PsychGetScreenRect(screenSettings->screenNumber, screenrect);
if (PsychMatchRect(screenrect, windowRecord->rect)) windowRecord->specialflags |= kPsychIsFullscreenWindow;
PsychGetGlobalScreenRect(screenSettings->screenNumber, screenrect);
if (PsychMatchRect(screenrect, windowRecord->rect)) windowRecord->specialflags |= kPsychIsFullscreenWindow;
if ((windowRecord->specialflags & kPsychIsFullscreenWindow) && (PsychPrefStateGet_Verbosity() > 3)) {
printf("PTB-INFO: Always using Cocoa for fullscreen windows to work around graphics driver bugs in OSX.\n");
printf("PTB-INFO: Presentation timing precision is not yet known for this configuration on most machines. Check your results.\n");
}
// Display for fullscreen window not captured? Timing precision is unclear in this mode. In theory the compositor should disable
// itself for fullscreen windows on modern OSX versions. If it really does that, who knows?
if ((windowRecord->specialflags & kPsychIsFullscreenWindow) && (PsychPrefStateGet_ConserveVRAM() & kPsychUseAGLCompositorForFullscreenWindows)) {
// Force a window rectangle that matches the global screen rectangle for that windows screen:
PsychCopyRect(windowRecord->rect, screenrect);
// Warn user about what's going on:
if (PsychPrefStateGet_Verbosity()>1) printf("PTB-INFO: No display capture / compositor lockout for fullscreen window. Timing precision is unknown.\n");
}
if ((windowRecord->specialflags & kPsychGUIWindow) && (PsychPrefStateGet_Verbosity() > 3)) {
printf("PTB-INFO: Onscreen window is configured as regular GUI window.\n");
}
// Create onscreen Cocoa window of requested position and size:
if (PsychCocoaCreateWindow(windowRecord, windowLevel, &cocoaWindow)) {
printf("\nPTB-ERROR[CreateNewWindow failed]: Failed to open Cocoa onscreen window\n\n");
return(FALSE);
}
// Transparent window requested?
if ((windowLevel >= 1000) && (windowLevel < 2000)) {
// Setup of global window alpha value for transparency. This is premultiplied to
// the individual per-pixel alpha values if transparency is enabled by Cocoa code.
//
// Levels 1000 - 1499 and 1500 to 1999 map to a master opacity level of 0.0 - 1.0:
PsychCocoaSetWindowAlpha(cocoaWindow, ((float) (windowLevel % 500)) / 499.0);
}
// Show it! Unless a windowLevel of -1 requests hiding the window:
if (windowLevel != -1) PsychCocoaShowWindow(cocoaWindow);
// If usercode wants a black startup screen then we add a pause of 0.5 seconds here
// before proceeding. This will avoid a white flash at window open time, which might
// be something the user wanted to avoid. Why does this help or is needed at all?
// Nobody knows, but this is Apples ridiculous toy OS, so why even ask such questions?
if (PsychPrefStateGet_VisualDebugLevel() < 4)
PsychYieldIntervalSeconds(0.5);
// Level zero means: Place behind all other windows:
if (windowLevel == 0) PsychCocoaSendBehind(cocoaWindow);
// Levels 1 to 999 define window levels for the group of the window.
// A level of -2 would leave this to the system:
if (windowLevel > 0 && windowLevel < 1000) PsychCocoaSetWindowLevel(cocoaWindow, windowLevel);
// Is the target display captured for a fullscreen window?
if (PsychIsScreenCaptured(screenSettings->screenNumber)) {
// Yes. Make sure our window is above the shielding window level:
PsychCocoaSetWindowLevel(cocoaWindow, (int) CGShieldingWindowLevel());
}
// Store window handle in windowRecord:
windowRecord->targetSpecific.windowHandle = cocoaWindow;
// Store vblank startline aka true height of physical display screen in pixels:
PsychGetScreenPixelSize(screenSettings->screenNumber, &scw, &sch);
windowRecord->VBL_Startline = (int) sch;
// Define pixelformat attributes for OpenGL contexts:
// No pixelformat attribs to start with:
attribcount = 0;
attribs[attribcount++]=kCGLPFADisplayMask;
attribs[attribcount++]=displayMask;
// 10 bit per component integer framebuffer requested (10-10-10-2)?
if (windowRecord->depth == 30) {
// Request a 10 bit per color component framebuffer with 2 bit alpha channel:
printf("PTB-INFO: Trying to enable 10 bpc, 30 bit integer framebuffer...\n");
attribs[attribcount++]=kCGLPFANoRecovery;
attribs[attribcount++]=kCGLPFAMinimumPolicy;
attribs[attribcount++]=kCGLPFAColorSize;
attribs[attribcount++]=10*3;
attribs[attribcount++]=kCGLPFAAlphaSize;
attribs[attribcount++]=2;
}
// 11 bit per component integer framebuffer requested (11-11-10-0)?
if (windowRecord->depth == 33) {
// Request a ~ 11 bit per color component framebuffer without alpha channel:
printf("PTB-INFO: Trying to enable 11 bpc, 32 bit integer framebuffer...\n");
attribs[attribcount++]=kCGLPFANoRecovery;
attribs[attribcount++]=kCGLPFAMinimumPolicy;
attribs[attribcount++]=kCGLPFAColorSize;
attribs[attribcount++]=32;
attribs[attribcount++]=kCGLPFAAlphaSize;
attribs[attribcount++]=0;
}
// 16 bit per component integer framebuffer requested (16-16-16-16)?
if (windowRecord->depth == 48) {
// Request a 16 bit per color component framebuffer:
printf("PTB-INFO: Trying to enable 16 bpc, 64 bit integer framebuffer...\n");
attribs[attribcount++]=kCGLPFANoRecovery;
attribs[attribcount++]=kCGLPFAMinimumPolicy;
attribs[attribcount++]=kCGLPFAColorSize;
attribs[attribcount++]=16*3;
attribs[attribcount++]=kCGLPFAAlphaSize;
attribs[attribcount++]=16;
}
// 16 bit per component, 64 bit framebuffer requested (16-16-16-16)?
if (windowRecord->depth == 64) {
// Request a floating point framebuffer in 16-bit half-float format, i.e., RGBA = 16 bits per component.
printf("PTB-INFO: Trying to enable 16 bpc float framebuffer...\n");
attribs[attribcount++]=kCGLPFAColorFloat;
attribs[attribcount++]=kCGLPFAMinimumPolicy;
attribs[attribcount++]=kCGLPFAColorSize;
attribs[attribcount++]=16*3;
attribs[attribcount++]=kCGLPFAAlphaSize;
attribs[attribcount++]=16;
}
// 32 bit per component, 128 bit framebuffer requested (32-32-32-32)?
if (windowRecord->depth == 128) {
// Request a floating point framebuffer in 32-bit float format, i.e., RGBA = 32 bits per component.
printf("PTB-INFO: Trying to enable 32 bpc float framebuffer...\n");
attribs[attribcount++]=kCGLPFAColorFloat;
attribs[attribcount++]=kCGLPFAMinimumPolicy;
attribs[attribcount++]=kCGLPFAColorSize;
attribs[attribcount++]=32*3;
attribs[attribcount++]=kCGLPFAAlphaSize;
attribs[attribcount++]=32;
}
// Possible to request use of the Apple floating point software renderer:
if (conserveVRAM & kPsychUseSoftwareRenderer) {
#ifndef kCGLRendererGenericFloatID
#define kCGLRendererGenericFloatID 0x00020400
#endif
attribs[attribcount++]=AGL_RENDERER_ID;
attribs[attribcount++]=kCGLRendererGenericFloatID;
}
// Support for 3D rendering requested?
if (PsychPrefStateGet_3DGfx()) {
// Yes. Allocate a 24-Bit depth and 8-Bit stencilbuffer for this purpose:
attribs[attribcount++]=kCGLPFADepthSize;
attribs[attribcount++]=24;
attribs[attribcount++]=kCGLPFAStencilSize;
attribs[attribcount++]=8;
// Alloc an accumulation buffer as well?
if (PsychPrefStateGet_3DGfx() & 2) {
// Yes: Alloc accum buffer, request 64 bpp, aka 16 bits integer per color component if possible:
attribs[attribcount++]=kCGLPFAAccumSize;
attribs[attribcount++]=64;
}
}
if(numBuffers>=2){
// Enable double-buffering:
attribs[attribcount++]=kCGLPFADoubleBuffer;
if ((conserveVRAM & kPsychDisableAUXBuffers) == 0) {
// Allocate one or two (for mono vs. stereo display) AUX buffers for "don't clear" mode of Screen('Flip'):
// Not clearing the framebuffer after "Flip" is implemented by storing a backup-copy of
// the backbuffer to AUXs before flip and restoring the content from AUXs after flip.
// Unless the imaging pipeline is active, which doesn't need AUX buffers due to internal
// storage of fb content in its drawbufferFBO's:
attribs[attribcount++]=kCGLPFAAuxBuffers;
attribs[attribcount++]=(stereomode==kPsychOpenGLStereo || stereomode==kPsychCompressedTLBRStereo || stereomode==kPsychCompressedTRBLStereo) ? 2 : 1;
}
}
// If stereo display output is requested with OpenGL native stereo, request a stereo-enabled rendering context.
// This is deprecated since 10.11 El Capitan, and in fact does no longer work - OpenGL quad buffered stereo is
// dead on 10.11 on all tested GPU's from Intel, NVidia, AMD.
if(stereomode==kPsychOpenGLStereo) {
attribs[attribcount++] = kCGLPFAStereo;
}
// Multisampled Anti-Aliasing requested?
if (windowRecord->multiSample > 0) {
// Request a multisample buffer:
attribs[attribcount++]= kCGLPFASampleBuffers;
attribs[attribcount++]= 1;
// Request at least multiSample samples per pixel:
attribs[attribcount++]= kCGLPFASamples;
attribs[attribcount++]= windowRecord->multiSample;
}
// Finalize attribute array with NULL.
attribs[attribcount++]=(CGLPixelFormatAttribute)NULL;
// Init to zero:
windowRecord->targetSpecific.pixelFormatObject = NULL;
windowRecord->targetSpecific.glusercontextObject = NULL;
windowRecord->targetSpecific.glswapcontextObject = NULL;
// Try to find matching pixelformat:
error = CGLChoosePixelFormat(attribs, &(windowRecord->targetSpecific.pixelFormatObject), &numVirtualScreens);
// No valid pixelformat found and stereo format requested?
if ((error || (windowRecord->targetSpecific.pixelFormatObject == NULL)) && (stereomode == kPsychOpenGLStereo)) {
// Yep: Stereo may be the culprit. Remove the stereo attribute by overwriting it with something
// that is essentially a no-op, specifically kCGLPFAAccelerated which is supported by all real
// renderers that might end up in this code-path:
for (i = 0; i < attribcount && attribs[i] != kCGLPFAStereo; i++);
attribs[i] = kCGLPFAAccelerated;
// Retry query of pixelformat without request for native OpenGL quad-buffered stereo. If we succeed, we're
// sort of ok, as the higher-level code will fallback to stereomode kPsychFrameSequentialStereo - our own
// homegrown frame-sequential stereo support, which may be good enough.
error = CGLChoosePixelFormat(attribs, &(windowRecord->targetSpecific.pixelFormatObject), &numVirtualScreens);
if (error || (windowRecord->targetSpecific.pixelFormatObject == NULL)) {
windowRecord->targetSpecific.pixelFormatObject = NULL;
printf("\nPTB-ERROR[ChoosePixelFormat failed: %s]: Disabling OpenGL native quad-buffered stereo did not help. Moving on...\n\n", CGLErrorString(error));
}
}
// Now try if choosing a matching format for a lower multisample mode helps to get unstuck:
if (windowRecord->multiSample > 0) {
if (windowRecord->targetSpecific.pixelFormatObject==NULL && windowRecord->multiSample > 0) {
// Failed. Probably due to too demanding multisample requirements: Lets lower them...
for (i = 0; i < attribcount && attribs[i] != kCGLPFASamples; i++);
while (windowRecord->targetSpecific.pixelFormatObject == NULL && windowRecord->multiSample > 0) {
attribs[i+1]--;
windowRecord->multiSample--;
error = CGLChoosePixelFormat(attribs, &(windowRecord->targetSpecific.pixelFormatObject), &numVirtualScreens);
}
if (windowRecord->multiSample == 0 && windowRecord->targetSpecific.pixelFormatObject == NULL) {
// Ok, multisampling is now at zero and we still don't succeed. Disable multisampling completely:
for (i=0; i<attribcount && attribs[i]!=kCGLPFASampleBuffers; i++);
attribs[i+1] = 0;
printf("\nPTB-ERROR[ChoosePixelFormat failed: %s]: Disabling multisample anti-aliasing did not help. Moving on...\n\n", CGLErrorString(error));
}
}
}
// Try choosing a matching display configuration again and create the window and rendering context:
// If one of these two fails, then the installed gfx hardware is not good enough to satisfy our
// requirements, or we have massive ressource shortage in the system. -> Screwed up anyway, so we abort.
if (windowRecord->targetSpecific.pixelFormatObject == NULL) error = CGLChoosePixelFormat(attribs, &(windowRecord->targetSpecific.pixelFormatObject), &numVirtualScreens);
if (error) {
printf("\nPTB-ERROR[ChoosePixelFormat failed: %s]: Reason unknown. There could be insufficient video memory or a driver malfunction. Giving up.\n\n", CGLErrorString(error));
return(FALSE);
}
// Create an OpenGL rendering context with the selected pixelformat: Share its ressources with 'slaveWindow's context, if slaveWindow is non-NULL.
// If slaveWindow is non-NULL here, then slaveWindow is typically another onscreen window. Therefore this establishes OpenGL resource sharing across
// different onscreen windows in a session, e.g., for multi-display operation:
error=CGLCreateContext(windowRecord->targetSpecific.pixelFormatObject, ((windowRecord->slaveWindow) ? windowRecord->slaveWindow->targetSpecific.contextObject : NULL),
&(windowRecord->targetSpecific.contextObject));
if (error) {
printf("\nPTB-ERROR[ContextCreation failed: %s]: Could not create master OpenGL context for new onscreen window. Insufficient video memory?\n\n", CGLErrorString(error));
return(FALSE);
}
// Enable the OpenGL rendering context associated with our window:
error=CGLSetCurrentContext(windowRecord->targetSpecific.contextObject);
if (error) {
printf("\nPTB-ERROR[SetCurrentContext failed: %s]: Insufficient video memory\n\n", CGLErrorString(error));
return(FALSE);
}
// NULL-out the AGL context field, just for safety...
windowRecord->targetSpecific.deviceContext = NULL;
// Ok, the master OpenGL rendering context for this new onscreen window is up and running.
// Auto-detect and bind all available OpenGL extensions via GLEW:
glerr = glewInit();
if (GLEW_OK != glerr)
{
/* Problem: glewInit failed, something is seriously wrong. */
printf("\nPTB-ERROR[GLEW init failed: %s]: Please report this to the forum. Will try to continue, but may crash soon!\n\n", glewGetErrorString(glerr));
fflush(NULL);
}
else {
if (PsychPrefStateGet_Verbosity()>3) printf("PTB-INFO: Using GLEW version %s for automatic detection of OpenGL extensions...\n", glewGetString(GLEW_VERSION));
}
// Enable multisampling if it was requested:
if (windowRecord->multiSample > 0) glEnable(GL_MULTISAMPLE);
// External 3D graphics support enabled?
if (PsychPrefStateGet_3DGfx()) {
// Yes. We need to create an extra OpenGL rendering context for the external
// OpenGL code to provide optimal state-isolation. The context shares all
// heavyweight ressources likes textures, FBOs, VBOs, PBOs, shader, display lists and
// starts off as an identical copy of PTB's context as of here.
error=CGLCreateContext(windowRecord->targetSpecific.pixelFormatObject, windowRecord->targetSpecific.contextObject, &(windowRecord->targetSpecific.glusercontextObject));
if (error) {
printf("\nPTB-ERROR[UserContextCreation failed: %s]: Creating a private OpenGL context for userspace OpenGL failed.\n\n", CGLErrorString(error));
return(FALSE);
}
}
// Create glswapcontextObject - An OpenGL context for exclusive use by parallel background threads,
// e.g., our thread for async flip operations and self-made frame-sequential stereo:
error=CGLCreateContext(windowRecord->targetSpecific.pixelFormatObject, windowRecord->targetSpecific.contextObject, &(windowRecord->targetSpecific.glswapcontextObject));
if (error) {
printf("\nPTB-ERROR[SwapContextCreation failed: %s]: Creating a private OpenGL context for async-bufferswaps failed.\n\n", CGLErrorString(error));
CGLSetCurrentContext(NULL);
return(FALSE);
}
// Store Cocoa onscreen window handle:
windowRecord->targetSpecific.windowHandle = cocoaWindow;
// Objective-C setup path, using Cocoa + NSOpenGLContext wrapped around already
// existing and setup CGLContext:
if (PsychCocoaSetupAndAssignOpenGLContextsFromCGLContexts(cocoaWindow, windowRecord)) {
printf("\nPTB-ERROR[Cocoa OpenGL setup failed]: Setup failed for unknown reasons.\n\n");
PsychCocoaDisposeWindow(windowRecord);
return(FALSE);
}
// Check for output display rotation enabled. Will impair timing/timestamping because
// it uses the desktop compositor for a rotated copy blit, instead of via rotated crtc
// scanout, as most crtc's don't support this in hardware:
if ((((int) CGDisplayRotation(cgDisplayID)) != 0) && (PsychPrefStateGet_Verbosity() > 1)) {
printf("PTB-WARNING: Your onscreen windows output display has rotation enabled. It is not displaying in upright orientation.\n");
printf("PTB-WARNING: On most graphics cards this will cause unreliable stimulus presentation timing and timestamping.\n");
printf("PTB-WARNING: If you want non-upright stimulus presentation, look at 'help PsychImaging' on how to achieve this in\n");
printf("PTB-WARNING: a way that doesn't impair timing. The subfunctions 'FlipHorizontal' and 'FlipVertical' are what you probably need.\n");
}
// First reference to this screen by a window?
if (screenRefCount[screenSettings->screenNumber] == 0) {
// High precision timestamping enabled? If so, we need to setup the fallback
// timestamping methods in case beamposition timestamping doesn't work:
if (PsychPrefStateGet_VBLTimestampingMode() > 0) {
// Use of CoreVideo is needed on 10.7 and later due to brokeness of the old method (thanks Apple!):
if (PsychPrefStateGet_Verbosity() > 2) {
printf("PTB-INFO: Will use fragile CoreVideo timestamping as fallback if beamposition timestamping doesn't work.\n");
// Recommend use of kernel driver if it isn't installed already for all but Intel GPU's:
if (!PsychOSIsKernelDriverAvailable(screenSettings->screenNumber) && !strstr((char*) glGetString(GL_VENDOR), "Intel")) {
printf("PTB-INFO: Installation of the PsychtoolboxKernelDriver is strongly recommended if you care about precise visual\n");
printf("PTB-INFO: onset timestamping or timing. See 'help PsychtoolboxKernelDriver' for installation instructions.\n");
}
}
if (NULL == cvDisplayLink[screenSettings->screenNumber]) {
// CoreVideo timestamping:
//
// Create and start a CVDisplayLink for this screen.
if (kCVReturnSuccess != CVDisplayLinkCreateWithCGDisplay(cgDisplayID, &cvDisplayLink[screenSettings->screenNumber])) {
if (PsychPrefStateGet_Verbosity()>1) printf("PTB-WARNING: Failed to create CVDisplayLink for screenId %i. This may impair VBL timestamping.\n", screenSettings->screenNumber);
} else {
// Assign dummy output callback, as this is mandatory to get the link up and running:
CVDisplayLinkSetOutputCallback(cvDisplayLink[screenSettings->screenNumber], &PsychCVDisplayLinkOutputCallback, (void*) (long int) screenSettings->screenNumber);
// Setup shared data structure and mutex:
memset(&cvDisplayLinkData[screenSettings->screenNumber], 0, sizeof(cvDisplayLinkData[screenSettings->screenNumber]));
PsychInitMutex(&(cvDisplayLinkData[screenSettings->screenNumber].mutex));
// Start the link:
if (kCVReturnSuccess != CVDisplayLinkStart(cvDisplayLink[screenSettings->screenNumber])) {
// Failed to start: Release it again and report error:
CVDisplayLinkRelease(cvDisplayLink[screenSettings->screenNumber]);
cvDisplayLink[screenSettings->screenNumber] = NULL;
// Teardown shared data structure and mutex:
PsychDestroyMutex(&(cvDisplayLinkData[screenSettings->screenNumber].mutex));
if (PsychPrefStateGet_Verbosity()>1) printf("PTB-WARNING: Failed to start CVDisplayLink for screenId %i. This may impair VBL timestamping.\n", screenSettings->screenNumber);
}
else {
// Display link started: Report some stuff for the fun of it...
if (PsychPrefStateGet_Verbosity() > 3) {
// Wait for 50 msecs before query of video refresh from display link to give it a chance to start up:
PsychWaitIntervalSeconds(0.050);
printf("PTB-INFO: CVDisplayLink for screen %i created to work around the brokenness of Apple Mac OS/X 10.7 and later:\n", screenSettings->screenNumber);
printf("PTB-INFO: Video refresh interval as measured by CoreVideo display link: %f msecs.\n", (float) CVDisplayLinkGetActualOutputVideoRefreshPeriod(cvDisplayLink[screenSettings->screenNumber]) * 1000.0);
CVTime outLatency = CVDisplayLinkGetOutputVideoLatency(cvDisplayLink[screenSettings->screenNumber]);
printf("PTB-INFO: Video display output delay as reported by CoreVideo display link: %f msecs.\n", screenSettings->screenNumber, (float) (((double) outLatency.timeValue / (double) outLatency.timeScale) * 1000.0));
}
}
}
}
}
else {
// VBLtimestampingmode 0 or -1 -- No CoreVideo fallback for timestamping if beamposition timestamping is unavailable:
// This is the new default as of Psychtoolbox 3.0.12 to avoid the buggy, crashy, unreliably CoreVideo fallback.
// Recommend use of kernel driver if it isn't installed already for all but Intel GPU's:
if (!PsychOSIsKernelDriverAvailable(screenSettings->screenNumber) && !strstr((char*) glGetString(GL_VENDOR), "Intel")) {
printf("PTB-INFO: Installation of the PsychtoolboxKernelDriver is strongly recommended if you care about precise visual\n");
printf("PTB-INFO: onset timestamping or timing. See 'help PsychtoolboxKernelDriver' for installation instructions.\n");
}
}
}
// Retain reference of this window to its screen:
screenRefCount[screenSettings->screenNumber]++;
// Done.
return(TRUE);
}
static bool CheckGLSL (bool vertex, bool gles, const std::string& testName, const char* prefix, const std::string& source)
{
#if !GOT_GFX
return true; // just assume it's ok
#endif
#if !GOT_MORE_THAN_GLSL_120
if (source.find("#version 140") != std::string::npos)
return true;
#endif
# ifdef __APPLE__
// Mac core context does not accept any older shader versions, so need to switch to
// either legacy context or core one.
const bool need3 =
(source.find("#version 150") != std::string::npos) ||
(source.find("#version 300") != std::string::npos);
if (need3)
{
if (!s_GL3Active)
CGLSetCurrentContext(s_GLContext3);
s_GL3Active = true;
}
else
{
if (s_GL3Active)
CGLSetCurrentContext(s_GLContext);
s_GL3Active = false;
}
# endif // ifdef __APPLE__
std::string src;
if (gles)
{
src += "#define lowp\n";
src += "#define mediump\n";
src += "#define highp\n";
src += "#define texture2DLodEXT texture2DLod\n";
src += "#define texture2DProjLodEXT texture2DProjLod\n";
src += "#define texture2DGradEXT texture2DGradARB\n";
src += "#define textureCubeGradEXT textureCubeGradARB\n";
src += "#define gl_FragDepthEXT gl_FragDepth\n";
src += "float shadow2DEXT (sampler2DShadow s, vec3 p) { return shadow2D(s,p).r; }\n";
src += "float shadow2DProjEXT (sampler2DShadow s, vec4 p) { return shadow2DProj(s,p).r; }\n";
}
src += source;
if (gles)
{
replace_string (src, "GL_EXT_shader_texture_lod", "GL_ARB_shader_texture_lod", 0);
replace_string (src, "#extension GL_OES_standard_derivatives : require", "", 0);
replace_string (src, "#extension GL_EXT_shadow_samplers : require", "", 0);
replace_string (src, "#extension GL_EXT_frag_depth : require", "", 0);
replace_string (src, "#extension GL_OES_standard_derivatives : enable", "", 0);
replace_string (src, "#extension GL_EXT_shadow_samplers : enable", "", 0);
replace_string (src, "#extension GL_EXT_frag_depth : enable", "", 0);
replace_string (src, "precision ", "// precision ", 0);
}
const char* sourcePtr = src.c_str();
GLhandleARB shader = glCreateShaderObjectARB (vertex ? GL_VERTEX_SHADER_ARB : GL_FRAGMENT_SHADER_ARB);
glShaderSourceARB (shader, 1, &sourcePtr, NULL);
glCompileShaderARB (shader);
GLint status;
glGetObjectParameterivARB (shader, GL_OBJECT_COMPILE_STATUS_ARB, &status);
bool res = true;
if (status == 0)
{
char log[4096];
GLsizei logLength;
glGetInfoLogARB (shader, sizeof(log), &logLength, log);
printf ("\n %s: real glsl compiler error on %s:\n%s\n", testName.c_str(), prefix, log);
res = false;
}
glDeleteObjectARB (shader);
return res;
}
static bool InitializeOpenGL ()
{
bool hasGLSL = false;
#if GOT_GFX
#ifdef _MSC_VER
// setup minimal required GL
HWND wnd = CreateWindowA(
"STATIC",
"GL",
WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
0, 0, 16, 16,
NULL, NULL,
GetModuleHandle(NULL), NULL );
HDC dc = GetDC( wnd );
PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), 1,
PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL,
PFD_TYPE_RGBA, 32,
0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,
16, 0,
0, PFD_MAIN_PLANE, 0, 0, 0, 0
};
int fmt = ChoosePixelFormat( dc, &pfd );
SetPixelFormat( dc, fmt, &pfd );
HGLRC rc = wglCreateContext( dc );
wglMakeCurrent( dc, rc );
#elif defined(__APPLE__)
CGLPixelFormatAttribute attributes[] = {
kCGLPFAAccelerated, // no software rendering
(CGLPixelFormatAttribute) 0
};
CGLPixelFormatAttribute attributes3[] = {
kCGLPFAAccelerated, // no software rendering
kCGLPFAOpenGLProfile, // core profile with the version stated below
(CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core,
(CGLPixelFormatAttribute) 0
};
GLint num;
CGLPixelFormatObj pix;
// create legacy context
CGLChoosePixelFormat(attributes, &pix, &num);
if (pix == NULL)
return false;
CGLCreateContext(pix, NULL, &s_GLContext);
if (s_GLContext == NULL)
return false;
CGLDestroyPixelFormat(pix);
CGLSetCurrentContext(s_GLContext);
// create core 3.2 context
CGLChoosePixelFormat(attributes3, &pix, &num);
if (pix == NULL)
return false;
CGLCreateContext(pix, NULL, &s_GLContext3);
if (s_GLContext3 == NULL)
return false;
CGLDestroyPixelFormat(pix);
#endif
// check if we have GLSL
const char* extensions = (const char*)glGetString(GL_EXTENSIONS);
hasGLSL = extensions != NULL && strstr(extensions, "GL_ARB_shader_objects") && strstr(extensions, "GL_ARB_vertex_shader") && strstr(extensions, "GL_ARB_fragment_shader");
#if defined(__APPLE__)
// using core profile; always has GLSL
hasGLSL = true;
#endif
#ifdef _MSC_VER
if (hasGLSL)
{
glDeleteObjectARB = (PFNGLDELETEOBJECTARBPROC)wglGetProcAddress("glDeleteObjectARB");
glCreateShaderObjectARB = (PFNGLCREATESHADEROBJECTARBPROC)wglGetProcAddress("glCreateShaderObjectARB");
glShaderSourceARB = (PFNGLSHADERSOURCEARBPROC)wglGetProcAddress("glShaderSourceARB");
glCompileShaderARB = (PFNGLCOMPILESHADERARBPROC)wglGetProcAddress("glCompileShaderARB");
glGetInfoLogARB = (PFNGLGETINFOLOGARBPROC)wglGetProcAddress("glGetInfoLogARB");
glGetObjectParameterivARB = (PFNGLGETOBJECTPARAMETERIVARBPROC)wglGetProcAddress("glGetObjectParameterivARB");
}
#endif
#endif
return hasGLSL;
}
ITunesPixelFormat ivis_render( ITunesVis* plugin, short audio_data[][512], float freq_data[][512],
void* buffer, long buffer_size, bool idle )
{
ITunesPixelFormat format = ITunesPixelFormatUnknown;
/* make sure we have a plugin and a visual handler */
if ( !plugin || !plugin->imports.visual_handler )
return format;
int i=0, w=0;
RenderVisualData visual_data;
DSPSplitComplex splitComplex[2];
float *data[2];
/* perform FFT if we're not idling */
if ( ! idle )
{
/* allocate some complex vars */
for ( i = 0 ; i < 2 ; i++ )
{
splitComplex[i].realp = calloc( 512, sizeof(float) );
splitComplex[i].imagp = calloc( 512, sizeof(float) );
data[i] = calloc( 512, sizeof(float) );
}
/* 2 channels for spectrum and waveform data */
visual_data.numWaveformChannels = 2;
visual_data.numSpectrumChannels = 2;
/* copy spectrum audio data to visual data strucure */
for ( w = 0 ; w < 512 ; w++ )
{
/* iTunes visualizers expect waveform data from 0 - 255, with level 0 at 128 */
visual_data.waveformData[0][w] = (UInt8)( (long)(audio_data[0][w]) / 128 + 128 );
visual_data.waveformData[1][w] = (UInt8)( (long)(audio_data[1][w]) / 128 + 128 );
/* scale to -1, +1 */
*( data[0] + w ) = (float)(( audio_data[0][w]) / (2.0 * 8192.0) );
*( data[1] + w ) = (float)(( audio_data[1][w]) / (2.0 * 8192.0) );
}
/* FFT scaler */
float scale = ( 1.0 / 1024.0 ) ; /* scale by length of input * 2 (due to how vDSP does FFTs) */
float nyq=0, dc=0, freq=0;
for ( i = 0 ; i < 2 ; i++ )
{
/* pack data into format fft_zrip expects it */
vDSP_ctoz( (COMPLEX*)( data[i] ), 2, &( splitComplex[i] ), 1, 256 );
/* perform FFT on normalized audio data */
fft_zrip( plugin->fft_setup, &( splitComplex[i] ), 1, 9, FFT_FORWARD );
/* scale the values */
vDSP_vsmul( splitComplex[i].realp, 1, &scale, splitComplex[i].realp, 1, 256 );
vDSP_vsmul( splitComplex[i].imagp, 1, &scale, splitComplex[i].imagp, 1, 256 );
/* unpack data */
vDSP_ztoc( &splitComplex[i], 1, (COMPLEX*)( data[i] ), 2, 256 );
/* ignore phase */
dc = *(data[i]) = fabs( *(data[i]) );
nyq = fabs( *(data[i] + 1) );
for ( w = 1 ; w < 256 ; w++ )
{
/* don't use vDSP for this since there's some overflow */
freq = hypot( *(data[i] + w * 2), *(data[i] + w * 2 + 1) ) * 256 * 16;
freq = MAX( 0, freq );
freq = MIN( 255, freq );
visual_data.spectrumData[i][ w - 1 ] = (UInt8)( freq );
}
visual_data.spectrumData[i][256] = nyq;
}
/* deallocate complex vars */
for ( i = 0 ; i < 2 ; i++ )
{
free( splitComplex[i].realp );
free( splitComplex[i].imagp );
free( data[i] );
}
/* update the render message with the new visual data and timestamp */
plugin->visual_message.u.renderMessage.renderData = &visual_data;
plugin->visual_message.u.renderMessage.timeStampID++;
}
/* update time */
plugin->visual_message.u.renderMessage.currentPositionInMS =
ivis_current_time() - plugin->start_time; // FIXME: real time
/* save our GL context and send the vis a render message */
CGLContextObj currentContext = CGLGetCurrentContext();
if ( plugin->gl_context )
aglSetCurrentContext( (AGLContext)(plugin->gl_context ) );
/* call the plugin's render method */
if ( idle )
{
/* idle message */
if ( plugin->wants_idle )
plugin->imports.visual_handler( kVisualPluginIdleMessage,
&( plugin->visual_message ),
plugin->vis_ref );
}
else
{
/* render message */
plugin->imports.visual_handler( kVisualPluginRenderMessage,
&( plugin->visual_message ),
plugin->vis_ref );
/* set position message */
plugin->visual_message.u.setPositionMessage.positionTimeInMS
= plugin->visual_message.u.renderMessage.currentPositionInMS;
plugin->imports.visual_handler( kVisualPluginSetPositionMessage, &( plugin->visual_message ),
plugin->vis_ref );
}
/* update message */
plugin->imports.visual_handler( kVisualPluginUpdateMessage, NULL,
plugin->vis_ref );
/* read pixels and restore our GL context */
CGLLockContext( CGLGetCurrentContext() );
switch ( get_pixels( buffer, buffer_size, CGLGetCurrentContext() != currentContext ) )
{
case 3:
format = ITunesPixelFormatRGB24;
break;
case 4:
format = ITunesPixelFormatRGBA32;
break;
default:
break;
}
CGLUnlockContext ( CGLGetCurrentContext() );
/* restore our GL context */
CGLSetCurrentContext( currentContext );
return format;
}
DarwinGlRenderer::DarwinGlRenderer(const std::string& name)
: Gre::RendererPrivate(name)
, iGlobalContext()
, iDefaultPixelFormat()
{
// Here we find the best Default pixel format.
CGLPixelFormatAttribute formatAttribCore4[] =
{
kCGLPFADepthSize, (CGLPixelFormatAttribute) 32,
kCGLPFADoubleBuffer,
kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute) kCGLOGLPVersion_GL4_Core,
kCGLPFAAccelerated,
(CGLPixelFormatAttribute) 0
};
CGLPixelFormatAttribute formatAttribCore3[] =
{
kCGLPFADepthSize, (CGLPixelFormatAttribute) 32,
kCGLPFADoubleBuffer,
kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core,
kCGLPFAAccelerated,
(CGLPixelFormatAttribute) 0
};
GLint npix = 0;
bool success = false;
// Test for OpenGl 4 profile.
if ( CGLChoosePixelFormat(formatAttribCore4, &iDefaultPixelFormat, &npix) == kCGLNoError )
{
GreDebugPretty() << "OpenGl 4 PixelFormat is supported." << std::endl;
if ( !iGlobalContext )
{
if ( CGLCreateContext(iDefaultPixelFormat, nullptr, &iGlobalContext) == kCGLNoError )
{
GreDebugPretty() << "Global Context successfully created." << std::endl;
success = true;
}
}
}
// Test for OpenGl 3 profile.
if ( CGLChoosePixelFormat(formatAttribCore3, &iDefaultPixelFormat, &npix) == kCGLNoError && !success )
{
GreDebugPretty() << "OpenGl 3 PixelFormat is supported (min 3.2 core)." << std::endl;
if ( !iGlobalContext )
{
if ( CGLCreateContext(iDefaultPixelFormat, nullptr, &iGlobalContext) == kCGLNoError )
{
GreDebugPretty() << "Global Context successfully created." << std::endl;
success = true;
}
}
}
if ( !success )
{
iDefaultPixelFormat = nullptr;
iGlobalContext = nullptr;
GreDebugPretty() << "This Renderer needs at least OpenGl 3.2 Core profile." << std::endl;
throw Gre::GreExceptionWithText("No OpenGl 3.2 detected.");
}
else
{
// Create the HardwareProgramManager and bind the GlobalContext.
CGLSetCurrentContext(iGlobalContext);
iProgramManager = HardwareProgramManagerHolder ( new DarwinGlHardwareProgramManager("GlProgramManager") );
}
}
int _glfwPlatformOpenWindow( int width, int height,
const _GLFWwndconfig *wndconfig,
const _GLFWfbconfig *fbconfig )
{
OSStatus error;
unsigned int windowAttributes;
ProcessSerialNumber psn;
// TODO: Break up this function!
_glfwWin.refreshRate = wndconfig->refreshRate;
_glfwWin.windowNoResize = wndconfig->windowNoResize;
// Fail if OpenGL 3.0 or above was requested
if( wndconfig->glMajor > 2 )
{
fprintf( stderr, "OpenGL 3.0+ is not yet supported on Mac OS X\n" );
return GL_FALSE;
}
if( _glfwLibrary.Unbundled )
{
if( GetCurrentProcess( &psn ) != noErr )
{
fprintf( stderr, "Failed to get the process serial number\n" );
return GL_FALSE;
}
if( TransformProcessType( &psn, kProcessTransformToForegroundApplication ) != noErr )
{
fprintf( stderr, "Failed to become a foreground application\n" );
return GL_FALSE;
}
if( wndconfig->mode == GLFW_FULLSCREEN )
{
if( SetFrontProcess( &psn ) != noErr )
{
fprintf( stderr, "Failed to become the front process\n" );
return GL_FALSE;
}
}
}
if( !installEventHandlers() )
{
fprintf( stderr, "Failed to install Carbon application event handlers\n" );
return GL_FALSE;
}
// Windowed or fullscreen; AGL or CGL? Quite the mess...
// AGL appears to be the only choice for attaching OpenGL contexts to
// Carbon windows, but it leaves the user no control over fullscreen
// mode stretching. Solution: AGL for windowed, CGL for fullscreen.
if( wndconfig->mode == GLFW_WINDOW )
{
// create AGL pixel format attribute list
GLint AGLpixelFormatAttributes[256];
int numAGLAttrs = 0;
AGLpixelFormatAttributes[numAGLAttrs++] = AGL_RGBA;
AGLpixelFormatAttributes[numAGLAttrs++] = AGL_DOUBLEBUFFER;
AGLpixelFormatAttributes[numAGLAttrs++] = AGL_CLOSEST_POLICY;
if( fbconfig->stereo )
{
AGLpixelFormatAttributes[numAGLAttrs++] = AGL_STEREO;
}
_setAGLAttribute( AGL_AUX_BUFFERS, fbconfig->auxBuffers);
_setAGLAttribute( AGL_RED_SIZE, fbconfig->redBits );
_setAGLAttribute( AGL_GREEN_SIZE, fbconfig->greenBits );
_setAGLAttribute( AGL_BLUE_SIZE, fbconfig->blueBits );
_setAGLAttribute( AGL_ALPHA_SIZE, fbconfig->alphaBits );
_setAGLAttribute( AGL_DEPTH_SIZE, fbconfig->depthBits );
_setAGLAttribute( AGL_STENCIL_SIZE, fbconfig->stencilBits );
_setAGLAttribute( AGL_ACCUM_RED_SIZE, fbconfig->accumRedBits );
_setAGLAttribute( AGL_ACCUM_GREEN_SIZE, fbconfig->accumGreenBits );
_setAGLAttribute( AGL_ACCUM_BLUE_SIZE, fbconfig->accumBlueBits );
_setAGLAttribute( AGL_ACCUM_ALPHA_SIZE, fbconfig->accumAlphaBits );
if( fbconfig->samples > 1 )
{
_setAGLAttribute( AGL_SAMPLE_BUFFERS_ARB, 1 );
_setAGLAttribute( AGL_SAMPLES_ARB, fbconfig->samples );
AGLpixelFormatAttributes[numAGLAttrs++] = AGL_NO_RECOVERY;
}
AGLpixelFormatAttributes[numAGLAttrs++] = AGL_NONE;
// create pixel format descriptor
AGLDevice mainMonitor = GetMainDevice();
_glfwWin.aglPixelFormat = aglChoosePixelFormat( &mainMonitor,
1,
AGLpixelFormatAttributes );
if( _glfwWin.aglPixelFormat == NULL )
{
fprintf( stderr,
"Failed to choose AGL pixel format: %s\n",
aglErrorString( aglGetError() ) );
return GL_FALSE;
}
// create AGL context
_glfwWin.aglContext = aglCreateContext( _glfwWin.aglPixelFormat, NULL );
if( _glfwWin.aglContext == NULL )
{
fprintf( stderr,
"Failed to create AGL context: %s\n",
aglErrorString( aglGetError() ) );
return GL_FALSE;
}
// create window
Rect windowContentBounds;
windowContentBounds.left = 0;
windowContentBounds.top = 0;
windowContentBounds.right = width;
windowContentBounds.bottom = height;
windowAttributes = ( kWindowCloseBoxAttribute |
kWindowCollapseBoxAttribute |
kWindowStandardHandlerAttribute );
if( wndconfig->windowNoResize )
{
windowAttributes |= kWindowLiveResizeAttribute;
}
else
{
windowAttributes |= ( kWindowFullZoomAttribute |
kWindowResizableAttribute );
}
error = CreateNewWindow( kDocumentWindowClass,
windowAttributes,
&windowContentBounds,
&( _glfwWin.window ) );
if( ( error != noErr ) || ( _glfwWin.window == NULL ) )
{
fprintf( stderr, "Failed to create Carbon window\n" );
return GL_FALSE;
}
_glfwWin.windowUPP = NewEventHandlerUPP( windowEventHandler );
error = InstallWindowEventHandler( _glfwWin.window,
_glfwWin.windowUPP,
GetEventTypeCount( GLFW_WINDOW_EVENT_TYPES ),
GLFW_WINDOW_EVENT_TYPES,
NULL,
NULL );
if( error != noErr )
{
fprintf( stderr, "Failed to install Carbon window event handler\n" );
return GL_FALSE;
}
// Don't care if we fail here
(void)SetWindowTitleWithCFString( _glfwWin.window, CFSTR( "GLFW Window" ) );
(void)RepositionWindow( _glfwWin.window,
NULL,
kWindowCenterOnMainScreen );
if( !aglSetDrawable( _glfwWin.aglContext,
GetWindowPort( _glfwWin.window ) ) )
{
fprintf( stderr,
"Failed to set the AGL context as the Carbon window drawable: %s\n",
aglErrorString( aglGetError() ) );
return GL_FALSE;
}
// Make OpenGL context current
if( !aglSetCurrentContext( _glfwWin.aglContext ) )
{
fprintf( stderr,
"Failed to make AGL context current: %s\n",
aglErrorString( aglGetError() ) );
return GL_FALSE;
}
ShowWindow( _glfwWin.window );
}
else
{
CGDisplayErr cgErr;
CGLError cglErr;
CFDictionaryRef optimalMode;
GLint numCGLvs = 0;
CGLPixelFormatAttribute CGLpixelFormatAttributes[64];
int numCGLAttrs = 0;
// variables for enumerating color depths
GLint rgbColorDepth;
// CGL pixel format attributes
_setCGLAttribute( kCGLPFADisplayMask,
CGDisplayIDToOpenGLDisplayMask( kCGDirectMainDisplay ) );
if( fbconfig->stereo )
{
CGLpixelFormatAttributes[ numCGLAttrs++ ] = kCGLPFAStereo;
}
if( fbconfig->samples > 1 )
{
_setCGLAttribute( kCGLPFASamples, (CGLPixelFormatAttribute)fbconfig->samples );
_setCGLAttribute( kCGLPFASampleBuffers, (CGLPixelFormatAttribute)1 );
CGLpixelFormatAttributes[ numCGLAttrs++ ] = kCGLPFANoRecovery;
}
CGLpixelFormatAttributes[ numCGLAttrs++ ] = kCGLPFAFullScreen;
CGLpixelFormatAttributes[ numCGLAttrs++ ] = kCGLPFADoubleBuffer;
CGLpixelFormatAttributes[ numCGLAttrs++ ] = kCGLPFAAccelerated;
CGLpixelFormatAttributes[ numCGLAttrs++ ] = kCGLPFANoRecovery;
CGLpixelFormatAttributes[ numCGLAttrs++ ] = kCGLPFAMinimumPolicy;
_setCGLAttribute( kCGLPFAAccumSize,
(CGLPixelFormatAttribute)( fbconfig->accumRedBits \
+ fbconfig->accumGreenBits \
+ fbconfig->accumBlueBits \
+ fbconfig->accumAlphaBits ) );
_setCGLAttribute( kCGLPFAAlphaSize, (CGLPixelFormatAttribute)fbconfig->alphaBits );
_setCGLAttribute( kCGLPFADepthSize, (CGLPixelFormatAttribute)fbconfig->depthBits );
_setCGLAttribute( kCGLPFAStencilSize, (CGLPixelFormatAttribute)fbconfig->stencilBits );
_setCGLAttribute( kCGLPFAAuxBuffers, (CGLPixelFormatAttribute)fbconfig->auxBuffers );
CGLpixelFormatAttributes[ numCGLAttrs++ ] = (CGLPixelFormatAttribute)NULL;
// create a suitable pixel format with above attributes..
cglErr = CGLChoosePixelFormat( CGLpixelFormatAttributes,
&_glfwWin.cglPixelFormat,
&numCGLvs );
if( cglErr != kCGLNoError )
{
fprintf( stderr,
"Failed to choose CGL pixel format: %s\n",
CGLErrorString( cglErr ) );
return GL_FALSE;
}
// ..and create a rendering context using that pixel format
cglErr = CGLCreateContext( _glfwWin.cglPixelFormat, NULL, &_glfwWin.cglContext );
if( cglErr != kCGLNoError )
{
fprintf( stderr,
"Failed to create CGL context: %s\n",
CGLErrorString( cglErr ) );
return GL_FALSE;
}
// enumerate depth of RGB channels - unlike AGL, CGL works with
// a single parameter reflecting the full depth of the frame buffer
(void)CGLDescribePixelFormat( _glfwWin.cglPixelFormat,
0,
kCGLPFAColorSize,
&rgbColorDepth );
// capture the display for our application
cgErr = CGCaptureAllDisplays();
if( cgErr != kCGErrorSuccess )
{
fprintf( stderr,
"Failed to capture Core Graphics displays\n");
return GL_FALSE;
}
// find closest matching NON-STRETCHED display mode..
optimalMode = CGDisplayBestModeForParametersAndRefreshRateWithProperty(
kCGDirectMainDisplay,
rgbColorDepth,
width,
height,
wndconfig->refreshRate,
NULL,
NULL );
if( optimalMode == NULL )
{
fprintf( stderr,
"Failed to retrieve Core Graphics display mode\n");
return GL_FALSE;
}
// ..and switch to that mode
cgErr = CGDisplaySwitchToMode( kCGDirectMainDisplay, optimalMode );
if( cgErr != kCGErrorSuccess )
{
fprintf( stderr,
"Failed to switch to Core Graphics display mode\n");
return GL_FALSE;
}
// switch to our OpenGL context, and bring it up fullscreen
cglErr = CGLSetCurrentContext( _glfwWin.cglContext );
if( cglErr != kCGLNoError )
{
fprintf( stderr,
"Failed to make CGL context current: %s\n",
CGLErrorString( cglErr ) );
return GL_FALSE;
}
cglErr = CGLSetFullScreen( _glfwWin.cglContext );
if( cglErr != kCGLNoError )
{
fprintf( stderr,
"Failed to set CGL fullscreen mode: %s\n",
CGLErrorString( cglErr ) );
return GL_FALSE;
}
}
return GL_TRUE;
}
void _glfwPlatformCloseWindow( void )
{
if( _glfwWin.mouseUPP != NULL )
{
DisposeEventHandlerUPP( _glfwWin.mouseUPP );
_glfwWin.mouseUPP = NULL;
}
if( _glfwWin.commandUPP != NULL )
{
DisposeEventHandlerUPP( _glfwWin.commandUPP );
_glfwWin.commandUPP = NULL;
}
if( _glfwWin.keyboardUPP != NULL )
{
DisposeEventHandlerUPP( _glfwWin.keyboardUPP );
_glfwWin.keyboardUPP = NULL;
}
if( _glfwWin.windowUPP != NULL )
{
DisposeEventHandlerUPP( _glfwWin.windowUPP );
_glfwWin.windowUPP = NULL;
}
if( _glfwWin.fullscreen )
{
if( _glfwWin.cglContext != NULL )
{
CGLSetCurrentContext( NULL );
CGLClearDrawable( _glfwWin.cglContext );
CGLDestroyContext( _glfwWin.cglContext );
CGReleaseAllDisplays();
_glfwWin.cglContext = NULL;
}
if( _glfwWin.cglPixelFormat != NULL )
{
CGLDestroyPixelFormat( _glfwWin.cglPixelFormat );
_glfwWin.cglPixelFormat = NULL;
}
}
else
{
if( _glfwWin.aglContext != NULL )
{
aglSetCurrentContext( NULL );
aglSetDrawable( _glfwWin.aglContext, NULL );
aglDestroyContext( _glfwWin.aglContext );
_glfwWin.aglContext = NULL;
}
if( _glfwWin.aglPixelFormat != NULL )
{
aglDestroyPixelFormat( _glfwWin.aglPixelFormat );
_glfwWin.aglPixelFormat = NULL;
}
}
if( _glfwWin.window != NULL )
{
ReleaseWindow( _glfwWin.window );
_glfwWin.window = NULL;
}
}
CGImageRef grabViaOpenGL(CGDirectDisplayID display, CGRect srcRect)
{
CGContextRef bitmap;
CGImageRef image;
void * data;
long bytewidth;
GLint width, height;
long bytes;
CGLContextObj glContextObj;
CGLPixelFormatObj pixelFormatObj ;
long numPixelFormats ;
CGLPixelFormatAttribute attribs[] =
{
kCGLPFAFullScreen,
kCGLPFADisplayMask,
0, /* Display mask bit goes here */
0
} ;
if ( display == kCGNullDirectDisplay )
display = CGMainDisplayID();
attribs[2] = CGDisplayIDToOpenGLDisplayMask(display);
/* Build a full-screen GL context */
CGLChoosePixelFormat( attribs, &pixelFormatObj, &numPixelFormats );
if ( pixelFormatObj == NULL ) // No full screen context support
return NULL;
CGLCreateContext( pixelFormatObj, NULL, &glContextObj ) ;
CGLDestroyPixelFormat( pixelFormatObj ) ;
if ( glContextObj == NULL )
return NULL;
CGLSetCurrentContext( glContextObj ) ;
CGLSetFullScreen( glContextObj ) ;
glReadBuffer(GL_FRONT);
width = srcRect.size.width;
height = srcRect.size.height;
bytewidth = width * 4; // Assume 4 bytes/pixel for now
bytewidth = (bytewidth + 3) & ~3; // Align to 4 bytes
bytes = bytewidth * height; // width * height
/* Build bitmap context */
data = malloc(height * bytewidth);
if ( data == NULL )
{
CGLSetCurrentContext( NULL );
CGLClearDrawable( glContextObj ); // disassociate from full screen
CGLDestroyContext( glContextObj ); // and destroy the context
return NULL;
}
bitmap = CGBitmapContextCreate(data, width, height, 8, bytewidth,
wxMacGetGenericRGBColorSpace(), kCGImageAlphaNoneSkipFirst /* XRGB */);
/* Read framebuffer into our bitmap */
glFinish(); /* Finish all OpenGL commands */
glPixelStorei(GL_PACK_ALIGNMENT, 4); /* Force 4-byte alignment */
glPixelStorei(GL_PACK_ROW_LENGTH, 0);
glPixelStorei(GL_PACK_SKIP_ROWS, 0);
glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
/*
* Fetch the data in XRGB format, matching the bitmap context.
*/
glReadPixels((GLint)srcRect.origin.x, (GLint)srcRect.origin.y, width, height,
GL_BGRA,
#ifdef __BIG_ENDIAN__
GL_UNSIGNED_INT_8_8_8_8_REV, // for PPC
#else
GL_UNSIGNED_INT_8_8_8_8, // for Intel! http://lists.apple.com/archives/quartz-dev/2006/May/msg00100.html
#endif
data);
/*
* glReadPixels generates a quadrant I raster, with origin in the lower left
* This isn't a problem for signal processing routines such as compressors,
* as they can simply use a negative 'advance' to move between scanlines.
* CGImageRef and CGBitmapContext assume a quadrant III raster, though, so we need to
* invert it. Pixel reformatting can also be done here.
*/
swizzleBitmap(data, bytewidth, height);
/* Make an image out of our bitmap; does a cheap vm_copy of the bitmap */
image = CGBitmapContextCreateImage(bitmap);
/* Get rid of bitmap */
CFRelease(bitmap);
free(data);
/* Get rid of GL context */
CGLSetCurrentContext( NULL );
CGLClearDrawable( glContextObj ); // disassociate from full screen
CGLDestroyContext( glContextObj ); // and destroy the context
/* Returned image has a reference count of 1 */
return image;
}
bool WindowlessCglApplication::tryCreateContext(const Configuration&) {
CORRADE_ASSERT(!c, "Platform::WindowlessCglApplication::tryCreateContext(): context already created", false);
/* Check version */
int nPix = 0;
GLint major, minor;
CGLGetVersion(&major, &minor);
CGLError cglError;
if(major == 2 && minor < 1) {
Error() << "Platform::WindowlessCglApplication::tryCreateContext(): OpenGL version 2.1 or greater is required";
return false;
}
CGLPixelFormatAttribute pfAttributesGL_3_2[4] = {
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core,
(CGLPixelFormatAttribute) 0
};
cglError = CGLChoosePixelFormat(pfAttributesGL_3_2,&pixelFormat,&nPix);
if(cglError == kCGLBadPixelFormat) {
Error() << "Platform::WindowlessCglApplication::tryCreateContext(): OpenGL version 3.2 has failed trying GL version 3.0";
CGLPixelFormatAttribute pfAttributesGL3[4] = {
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute) kCGLOGLPVersion_GL3_Core,
(CGLPixelFormatAttribute) 0
};
cglError = CGLChoosePixelFormat(pfAttributesGL3,&pixelFormat,&nPix);
if(cglError == kCGLBadPixelFormat) {
Error() << "Platform::WindowlessCglApplication::tryCreateContext(): OpenGL version 3.0 has failed trying GL version Legacy";
CGLPixelFormatAttribute pfAttributesLegacy[4] = {
kCGLPFAAccelerated,
kCGLPFAOpenGLProfile,
(CGLPixelFormatAttribute) kCGLOGLPVersion_Legacy,
(CGLPixelFormatAttribute) 0
};
cglError = CGLChoosePixelFormat(pfAttributesLegacy,&pixelFormat,&nPix);
if(cglError == kCGLBadPixelFormat)
{
Error() << "Platform::WindowlessCglApplication::tryCreateContext(): Context could not be created";
return false;
}
}
}
cglError = CGLCreateContext(pixelFormat, NULL, &context);
if(cglError == kCGLBadContext) {
Error() << "Platform::WindowlessCglApplication::tryCreateContext(): cannot create context";
return false;
}
cglError = CGLSetCurrentContext(context);
c = new Context;
return true;
}
void GLContext::set()
{
CGLSetCurrentContext( context );
}
void GLContext::restore()
{
CGLSetCurrentContext( save_context );
}
void DestroyContext (GLContext* ctx)
{
if (NULL == ctx) return;
CGLSetCurrentContext(ctx->octx);
if (NULL != ctx->ctx) CGLReleaseContext(ctx->ctx);
}