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Merge pull request #458 from Paulchen-Panther/master 

Replace XGetImage with XShmGetImage

Former-commit-id: a40813e1c19b09b2d8f1cd5f6837bf7b2651e7a8
This commit is contained in:
tvdzwan 2016-01-21 20:48:35 +01:00
parent e0d04d606c 93f2b8b65f
commit fc0a5e0ae2
8 changed files with 162 additions and 32 deletions
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12
effects/police-lights-single.json Normal file
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@ -0,0 +1,12 @@
{
"name" : "Police Lights Single",
"script" : "police.py",
"args" :
{
"rotation-time" : 1.5,
"color_one" : [ 255, 0, 0 ],
"color_two" : [ 0, 0, 255 ],
"colors_count" : 10,
"reverse" : false
}
}

11
effects/police-lights-solid.json Normal file
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@ -0,0 +1,11 @@
{
"name" : "Police Lights Solid",
"script" : "police.py",
"args" :
{
"rotation-time" : 1.0,
"color_one" : [ 255, 0, 0 ],
"color_two" : [ 0, 0, 255 ],
"reverse" : false
}
}

46
effects/police.py Normal file
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@ -0,0 +1,46 @@
import hyperion
import time
import colorsys
# Get the parameters
rotationTime = float(hyperion.args.get('rotation-time', 2.0))
colorOne = hyperion.args.get('color_one', (255,0,0))
colorTwo = hyperion.args.get('color_two', (0,0,255))
colorsCount = hyperion.args.get('colors_count', hyperion.ledCount/2)
reverse = bool(hyperion.args.get('reverse', False))
# Check parameters
rotationTime = max(0.1, rotationTime)
colorsCount = min(hyperion.ledCount/2, colorsCount)
# Initialize the led data
hsv1 = colorsys.rgb_to_hsv(colorOne[0]/255.0, colorOne[1]/255.0, colorOne[2]/255.0)
hsv2 = colorsys.rgb_to_hsv(colorTwo[0]/255.0, colorTwo[1]/255.0, colorTwo[2]/255.0)
colorBlack = (0,0,0)
ledData = bytearray()
for i in range(hyperion.ledCount):
if i <= colorsCount:
rgb = colorsys.hsv_to_rgb(hsv1[0], hsv1[1], hsv1[2])
elif (i >= hyperion.ledCount/2-1) & (i < (hyperion.ledCount/2) + colorsCount):
rgb = colorsys.hsv_to_rgb(hsv2[0], hsv2[1], hsv2[2])
else:
rgb = colorBlack
ledData += bytearray((int(255*rgb[0]), int(255*rgb[1]), int(255*rgb[2])))
# Calculate the sleep time and rotation increment
increment = 3
sleepTime = rotationTime / hyperion.ledCount
while sleepTime < 0.05:
increment *= 2
sleepTime *= 2
increment %= hyperion.ledCount
# Switch direction if needed
if reverse:
increment = -increment
# Start the write data loop
while not hyperion.abort():
hyperion.setColor(ledData)
ledData = ledData[-increment:] + ledData[:-increment]
time.sleep(sleepTime)

21
include/grabber/X11Grabber.h
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@ -7,6 +7,11 @@
// X11 includes
#include <X11/Xlib.h>
#include <X11/extensions/Xrender.h>
#include <X11/extensions/XShm.h>
#include <sys/ipc.h>
#include <sys/shm.h>
class X11Grabber
{
public:
@ -16,6 +21,8 @@ public:
virtual ~X11Grabber();
int open();
bool Setup();
Image<ColorRgb> & grab();
@ -26,14 +33,24 @@ private:
int _cropRight;
int _cropTop;
int _cropBottom;
XImage* _xImage;
XShmSegmentInfo _shminfo;
/// Reference to the X11 display (nullptr if not opened)
Display * _x11Display;
Display* _x11Display;
Window _window;
XWindowAttributes _windowAttr;
unsigned _screenWidth;
unsigned _screenHeight;
unsigned _croppedWidth;
unsigned _croppedHeight;
Image<ColorRgb> _image;
void freeResources();
void setupResources();
int updateScreenDimensions();
};

94
libsrc/grabber/x11/X11Grabber.cpp
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@ -17,82 +17,116 @@ X11Grabber::X11Grabber(int cropLeft, int cropRight, int cropTop, int cropBottom,
_x11Display(nullptr),
_screenWidth(0),
_screenHeight(0),
_croppedWidth(0),
_croppedHeight(0),
_image(0,0)
{
_imageResampler.setHorizontalPixelDecimation(horizontalPixelDecimation);
_imageResampler.setVerticalPixelDecimation(verticalPixelDecimation);
_imageResampler.setCropping(0, 0, 0, 0); // cropping is performed by XGetImage
_imageResampler.setCropping(0, 0, 0, 0); // cropping is performed by XShmGetImage
}
X11Grabber::~X11Grabber()
{
if (_x11Display != nullptr)
{
freeResources();
XCloseDisplay(_x11Display);
}
}
int X11Grabber::open()
void X11Grabber::freeResources()
{
const char * display_name = nullptr;
_x11Display = XOpenDisplay(display_name);
// Cleanup allocated resources of the X11 grab
XShmDetach(_x11Display, &_shminfo);
XDestroyImage(_xImage);
shmdt(_shminfo.shmaddr);
shmctl(_shminfo.shmid, IPC_RMID, 0);
}
void X11Grabber::setupResources()
{
_xImage = XShmCreateImage(_x11Display, _windowAttr.visual,
_windowAttr.depth, ZPixmap, NULL, &_shminfo,
_croppedWidth, _croppedHeight);
_shminfo.shmid = shmget(IPC_PRIVATE, _xImage->bytes_per_line * _xImage->height, IPC_CREAT|0777);
_shminfo.shmaddr = _xImage->data = (char*)shmat(_shminfo.shmid,0,0);
_shminfo.readOnly = False;
XShmAttach(_x11Display, &_shminfo);
}
bool X11Grabber::Setup()
{
_x11Display = XOpenDisplay(NULL);
if (_x11Display == nullptr)
{
std::cerr << "Failed to open the default X11-display" << std::endl;
return -1;
}
std::cerr << "Unable to open display";
if (getenv("DISPLAY"))
std::cerr << " " << std::string(getenv("DISPLAY")) << std::endl;
else
std::cerr << ". DISPLAY environment variable not set" << std::endl;
return false;
}
_window = DefaultRootWindow(_x11Display);
return 0;
}
return true;
}
Image<ColorRgb> & X11Grabber::grab()
{
if (_x11Display == nullptr)
{
open();
}
updateScreenDimensions();
const unsigned croppedWidth = _screenWidth - _cropLeft - _cropRight;
const unsigned croppedHeight = _screenHeight - _cropTop - _cropBottom;
// Capture the current screen
XImage * xImage = XGetImage(_x11Display, DefaultRootWindow(_x11Display), _cropLeft, _cropTop, croppedWidth, croppedHeight, AllPlanes, ZPixmap);
if (xImage == nullptr)
XShmGetImage(_x11Display, _window, _xImage, _cropLeft, _cropTop, 0x00FFFFFF);
if (_xImage == nullptr)
{
std::cerr << "Grab failed" << std::endl;
return _image;
}
_imageResampler.processImage(reinterpret_cast<const uint8_t *>(xImage->data), xImage->width, xImage->height, xImage->bytes_per_line, PIXELFORMAT_BGR32, _image);
// Cleanup allocated resources of the X11 grab
XDestroyImage(xImage);
_imageResampler.processImage(reinterpret_cast<const uint8_t *>(_xImage->data), _xImage->width, _xImage->height, _xImage->bytes_per_line, PIXELFORMAT_BGR32, _image);
return _image;
}
int X11Grabber::updateScreenDimensions()
{
XWindowAttributes window_attributes_return;
const Status status = XGetWindowAttributes(_x11Display, DefaultRootWindow(_x11Display), &window_attributes_return);
const Status status = XGetWindowAttributes(_x11Display, _window, &_windowAttr);
if (status == 0)
{
std::cerr << "Failed to obtain window attributes" << std::endl;
return -1;
}
if (_screenWidth == unsigned(window_attributes_return.width) && _screenHeight == unsigned(window_attributes_return.height))
if (_screenWidth == unsigned(_windowAttr.width) && _screenHeight == unsigned(_windowAttr.height))
{
// No update required
return 0;
}
std::cout << "Update of screen resolution: [" << _screenWidth << "x" << _screenHeight <<"] => ";
_screenWidth = window_attributes_return.width;
_screenHeight = window_attributes_return.height;
if (_screenWidth || _screenHeight)
freeResources();
_screenWidth = _windowAttr.width;
_screenHeight = _windowAttr.height;
std::cout << "[" << _screenWidth << "x" << _screenHeight <<"]" << std::endl;
if (_screenWidth > unsigned(_cropLeft + _cropRight))
_croppedWidth = _screenWidth - _cropLeft - _cropRight;
else
_croppedWidth = _screenWidth;
if (_screenHeight > unsigned(_cropTop + _cropBottom))
_croppedHeight = _screenHeight - _cropTop - _cropBottom;
else
_croppedHeight = _screenHeight;
setupResources();
return 0;
}

5
src/hyperion-x11/X11Wrapper.cpp
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@ -29,6 +29,11 @@ void X11Wrapper::stop()
_timer.stop();
}
bool X11Wrapper::displayInit()
{
return _grabber.Setup();
}
void X11Wrapper::capture()
{
const Image<ColorRgb> & screenshot = _grabber.grab();

2
src/hyperion-x11/X11Wrapper.h
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@ -19,6 +19,8 @@ public:
void start();
void stop();
bool displayInit();
signals:
void sig_screenshot(const Image<ColorRgb> & screenshot);

3
src/hyperion-x11/hyperion-x11.cpp
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@ -77,6 +77,9 @@ int main(int argc, char ** argv)
argCropBottom.getValue(),
argSizeDecimation.getValue(), // horizontal decimation
argSizeDecimation.getValue()); // vertical decimation
if (!x11Wrapper.displayInit())
return -1;
if (argScreenshot.isSet())
{