mirror/JUCE
1
0
Fork 0
mirror of https://github.com/juce-framework/JUCE.git synced 2026-01-10 23:44:24 +00:00
Code Activity

XWindowSystem: Implement createSnapshotOfNativeWindow

Browse source
This commit is contained in:
reuk 2021-09-14 17:03:46 +01:00
parent 31500551e1
commit ea6d095ab5
No known key found for this signature in database
GPG key ID: 9ADCD339CFC98A11
4 changed files with 64 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

2
modules/juce_gui_basics/juce_gui_basics.h
View file

@ -162,7 +162,7 @@ namespace juce
class FlexBox;
class Grid;
#if JUCE_MAC || JUCE_WINDOWS
#if JUCE_MAC || JUCE_WINDOWS || JUCE_LINUX
Image createSnapshotOfNativeWindow (void* nativeWindowHandle);
#endif
}

1
modules/juce_gui_basics/native/x11/juce_linux_X11_Symbols.cpp
View file

@ -127,6 +127,7 @@ bool X11Symbols::loadAllSymbols()
makeSymbolBinding (xGetErrorDatabaseText, "XGetErrorDatabaseText"),
makeSymbolBinding (xGetErrorText, "XGetErrorText"),
makeSymbolBinding (xGetGeometry, "XGetGeometry"),
makeSymbolBinding (xGetImage, "XGetImage"),
makeSymbolBinding (xGetInputFocus, "XGetInputFocus"),
makeSymbolBinding (xGetModifierMapping, "XGetModifierMapping"),
makeSymbolBinding (xGetPointerMapping, "XGetPointerMapping"),

4
modules/juce_gui_basics/native/x11/juce_linux_X11_Symbols.h
View file

@ -237,6 +237,10 @@ public:
(::Display*, ::Drawable, ::Window*, int*, int*, unsigned int*, unsigned int*, unsigned int*, unsigned int*),
Status)
JUCE_GENERATE_FUNCTION_WITH_DEFAULT (XGetImage, xGetImage,
(::Display*, ::Drawable, int, int, unsigned int, unsigned int, unsigned long, int),
XImage*)
JUCE_GENERATE_FUNCTION_WITH_DEFAULT (XGetInputFocus, xGetInputFocus,
(::Display*, ::Window*, int*),
void)

68
modules/juce_gui_basics/native/x11/juce_linux_XWindowSystem.cpp
View file

@ -676,6 +676,16 @@ namespace Visuals
class XBitmapImage : public ImagePixelData
{
public:
explicit XBitmapImage (XImage* image)
: ImagePixelData (image->depth == 24 ? Image::RGB : Image::ARGB, image->width, image->height),
xImage (image),
imageDepth ((unsigned int) xImage->depth)
{
pixelStride = xImage->bits_per_pixel / 8;
lineStride = xImage->bytes_per_line;
imageData = reinterpret_cast<uint8*> (xImage->data);
}
XBitmapImage (Image::PixelFormat format, int w, int h,
bool clearImage, unsigned int imageDepth_, Visual* visual)
: ImagePixelData (format, w, h),
@ -699,8 +709,8 @@ public:
segmentInfo.shmaddr = (char *) -1;
segmentInfo.readOnly = False;
xImage = X11Symbols::getInstance()->xShmCreateImage (display, visual, imageDepth, ZPixmap, nullptr,
&segmentInfo, (unsigned int) w, (unsigned int) h);
xImage.reset (X11Symbols::getInstance()->xShmCreateImage (display, visual, imageDepth, ZPixmap, nullptr,
&segmentInfo, (unsigned int) w, (unsigned int) h));
if (xImage != nullptr)
{
@ -739,7 +749,7 @@ public:
imageDataAllocated.allocate ((size_t) (lineStride * h), format == Image::ARGB && clearImage);
imageData = imageDataAllocated;
xImage = (XImage*) ::calloc (1, sizeof (XImage));
xImage.reset ((XImage*) ::calloc (1, sizeof (XImage)));
xImage->width = w;
xImage->height = h;
@ -773,7 +783,7 @@ public:
xImage->blue_mask = visual->blue_mask;
}
if (! X11Symbols::getInstance()->xInitImage (xImage))
if (! X11Symbols::getInstance()->xInitImage (xImage.get()))
jassertfalse;
}
}
@ -791,7 +801,6 @@ public:
X11Symbols::getInstance()->xShmDetach (display, &segmentInfo);
X11Symbols::getInstance()->xFlush (display);
X11Symbols::getInstance()->xDestroyImage (xImage);
shmdt (segmentInfo.shmaddr);
shmctl (segmentInfo.shmid, IPC_RMID, nullptr);
@ -800,7 +809,6 @@ public:
#endif
{
xImage->data = nullptr;
X11Symbols::getInstance()->xDestroyImage (xImage);
}
}
@ -877,7 +885,7 @@ public:
auto* pixel = (PixelRGB*) p;
p += srcData.pixelStride;
X11Symbols::getInstance()->xPutPixel (xImage, x, y,
X11Symbols::getInstance()->xPutPixel (xImage.get(), x, y,
(((((uint32) pixel->getRed()) << rShiftL) >> rShiftR) & rMask)
| (((((uint32) pixel->getGreen()) << gShiftL) >> gShiftR) & gMask)
| (((((uint32) pixel->getBlue()) << bShiftL) >> bShiftR) & bMask));
@ -888,10 +896,10 @@ public:
// blit results to screen.
#if JUCE_USE_XSHM
if (isUsingXShm())
X11Symbols::getInstance()->xShmPutImage (display, (::Drawable) window, gc, xImage, sx, sy, dx, dy, dw, dh, True);
X11Symbols::getInstance()->xShmPutImage (display, (::Drawable) window, gc, xImage.get(), sx, sy, dx, dy, dw, dh, True);
else
#endif
X11Symbols::getInstance()->xPutImage (display, (::Drawable) window, gc, xImage, sx, sy, dx, dy, dw, dh);
X11Symbols::getInstance()->xPutImage (display, (::Drawable) window, gc, xImage.get(), sx, sy, dx, dy, dw, dh);
}
#if JUCE_USE_XSHM
@ -900,7 +908,15 @@ public:
private:
//==============================================================================
XImage* xImage = nullptr;
struct Deleter
{
void operator() (XImage* img) const noexcept
{
X11Symbols::getInstance()->xDestroyImage (img);
}
};
std::unique_ptr<XImage, Deleter> xImage;
const unsigned int imageDepth;
HeapBlock<uint8> imageDataAllocated;
HeapBlock<char> imageData16Bit;
@ -3709,4 +3725,36 @@ void XWindowSystem::windowMessageReceive (XEvent& event)
//==============================================================================
JUCE_IMPLEMENT_SINGLETON (XWindowSystem)
Image createSnapshotOfNativeWindow (void* window)
{
::Window root;
int wx, wy;
unsigned int ww, wh, bw, bitDepth;
XWindowSystemUtilities::ScopedXLock xLock;
const auto display = XWindowSystem::getInstance()->getDisplay();
if (! X11Symbols::getInstance()->xGetGeometry (display, (::Drawable) window, &root, &wx, &wy, &ww, &wh, &bw, &bitDepth))
return {};
const auto scale = []
{
if (auto* d = Desktop::getInstance().getDisplays().getPrimaryDisplay())
return d->scale;
return 1.0;
}();
auto image = Image { new XBitmapImage { X11Symbols::getInstance()->xGetImage (display,
(::Drawable) window,
0,
0,
ww,
wh,
AllPlanes,
ZPixmap) } };
return image.rescaled ((int) ((double) ww / scale), (int) ((double) wh / scale));
}
} // namespace juce