x11_display.cpp
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上传日期:2009-03-27
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- /*****************************************************************************
- * x11_display.cpp
- *****************************************************************************
- * Copyright (C) 2003 VideoLAN
- * $Id: x11_display.cpp 7858 2004-06-01 22:08:14Z asmax $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- * Olivier Teuli鑢e <ipkiss@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #ifdef X11_SKINS
- #include <X11/Xlib.h>
- #include <X11/Xutil.h>
- #include <X11/extensions/shape.h>
- #include "x11_display.hpp"
- #include "../src/logger.hpp"
- X11Display::X11Display( intf_thread_t *pIntf ): SkinObject( pIntf ),
- m_mainWindow( 0 ), m_gc( NULL ), m_colormap( 0 )
- {
- // Open a connection to the X Server
- m_pDisplay = XOpenDisplay( NULL );
- if( m_pDisplay == NULL )
- {
- MSG_ERR( "Cannot open display" );
- return;
- }
- // Load the XShape extension
- int event, error;
- XShapeQueryExtension( m_pDisplay, &event, &error );
- // Get the display parameters
- int screen = DefaultScreen( m_pDisplay );
- int depth = DefaultDepth( m_pDisplay, screen );
- int order = ImageByteOrder( m_pDisplay );
- // Template for looking up the XVisualInfo
- XVisualInfo xVInfoTemplate;
- xVInfoTemplate.screen = screen;
- xVInfoTemplate.depth = depth;
- XVisualInfo *pVInfo = NULL;
- int vCount = 0;
- switch( depth )
- {
- case 8:
- xVInfoTemplate.c_class = DirectColor;
- // Get the DirectColor visual
- pVInfo = XGetVisualInfo( m_pDisplay, VisualScreenMask |
- VisualClassMask, &xVInfoTemplate,
- &vCount );
- if( pVInfo == NULL )
- {
- msg_Err( getIntf(), "no DirectColor visual available" );
- m_pDisplay = NULL;
- break;
- }
- m_pVisual = pVInfo->visual;
- // Compute the color shifts
- getShifts( pVInfo->red_mask, m_redLeftShift, m_redRightShift );
- getShifts( pVInfo->green_mask, m_greenLeftShift,
- m_greenRightShift );
- getShifts( pVInfo->blue_mask, m_blueLeftShift, m_blueRightShift );
- // Create a color map
- m_colormap = XCreateColormap( m_pDisplay,
- DefaultRootWindow( m_pDisplay ),
- DefaultVisual( m_pDisplay, screen ), AllocAll );
- // Create the palette
- XColor pColors[255];
- for( uint16_t i = 0; i < 255; i++ )
- {
- // kludge: colors are indexed reversely because color 255 seems
- // to bereserved for black even if we try to set it to white
- pColors[i].pixel = 254-i;
- pColors[i].pad = 0;
- pColors[i].flags = DoRed | DoGreen | DoBlue;
- pColors[i].red = (i >> m_redLeftShift) << (m_redRightShift + 8);
- pColors[i].green = (i >> m_greenLeftShift) << (m_greenRightShift + 8);
- pColors[i].blue = (i >> m_blueLeftShift) << (m_blueRightShift + 8);
- }
- XStoreColors( m_pDisplay, m_colormap, pColors, 255 );
- makePixelImpl = &X11Display::makePixel8;
- m_pixelSize = 1;
- break;
- case 15:
- case 16:
- case 24:
- case 32:
- // Get the TrueColor visual
- xVInfoTemplate.c_class = TrueColor;
- pVInfo = XGetVisualInfo( m_pDisplay, VisualScreenMask |
- VisualDepthMask | VisualClassMask,
- &xVInfoTemplate, &vCount );
- if( pVInfo == NULL )
- {
- msg_Err( getIntf(), "No TrueColor visual for depth %d",
- depth );
- m_pDisplay = NULL;
- break;
- }
- m_pVisual = pVInfo->visual;
- // Compute the color shifts
- getShifts( pVInfo->red_mask, m_redLeftShift, m_redRightShift );
- getShifts( pVInfo->green_mask, m_greenLeftShift,
- m_greenRightShift );
- getShifts( pVInfo->blue_mask, m_blueLeftShift, m_blueRightShift );
- if( depth == 8 )
- {
- makePixelImpl = &X11Display::makePixel8;
- m_pixelSize = 1;
- }
- if( depth == 15 || depth == 16 )
- {
- if( order == MSBFirst )
- {
- makePixelImpl = &X11Display::makePixel16MSB;
- }
- else
- {
- makePixelImpl = &X11Display::makePixel16LSB;
- }
- m_pixelSize = 2;
- }
- else
- {
- if( order == MSBFirst )
- {
- makePixelImpl = &X11Display::makePixel32MSB;
- }
- else
- {
- makePixelImpl = &X11Display::makePixel32LSB;
- }
- m_pixelSize = 4;
- }
- break;
- default:
- msg_Err( getIntf(), "Unsupported depth: %d bppn", depth );
- m_pDisplay = NULL;
- break;
- }
- // Free the visual info
- if( pVInfo )
- {
- XFree( pVInfo );
- }
- // Create a graphics context that doesn't generate GraphicsExpose events
- if( m_pDisplay )
- {
- XGCValues xgcvalues;
- xgcvalues.graphics_exposures = False;
- m_gc = XCreateGC( m_pDisplay, DefaultRootWindow( m_pDisplay ),
- GCGraphicsExposures, &xgcvalues );
- // Create a parent window to have a single task in the task bar
- XSetWindowAttributes attr;
- m_mainWindow = XCreateWindow( m_pDisplay, DefaultRootWindow( m_pDisplay),
- 0, 0, 1, 1, 0, 0, InputOutput,
- CopyFromParent, 0, &attr );
- // Changing decorations
- struct {
- unsigned long flags;
- unsigned long functions;
- unsigned long decorations;
- long input_mode;
- unsigned long status;
- } motifWmHints;
- Atom hints_atom = XInternAtom( m_pDisplay, "_MOTIF_WM_HINTS", False );
- motifWmHints.flags = 2; // MWM_HINTS_DECORATIONS;
- motifWmHints.decorations = 0;
- XChangeProperty( m_pDisplay, m_mainWindow, hints_atom, hints_atom, 32,
- PropModeReplace, (unsigned char *)&motifWmHints,
- sizeof( motifWmHints ) / sizeof( long ) );
- // Change the window title
- XStoreName( m_pDisplay, m_mainWindow, "VLC Media Player" );
- // Receive map notify events
- XSelectInput( m_pDisplay, m_mainWindow, StructureNotifyMask );
- // Set an empty mask for the window
- Region mask = XCreateRegion();
- XShapeCombineRegion( m_pDisplay, m_mainWindow, ShapeBounding, 0, 0, mask,
- ShapeSet );
- // Map the window
- XMapWindow( m_pDisplay, m_mainWindow);
- // Move it outside the screen to avoid seeing it in workspace selector
- XMoveWindow( m_pDisplay, m_mainWindow, -10, -10 );
- }
- }
- X11Display::~X11Display()
- {
- if( m_mainWindow )
- {
- XDestroyWindow( m_pDisplay, m_mainWindow );
- }
- if( m_gc )
- {
- XFreeGC( m_pDisplay, m_gc );
- }
- if( m_colormap )
- {
- XFreeColormap( m_pDisplay, m_colormap );
- }
- if( m_pDisplay )
- {
- XCloseDisplay( m_pDisplay );
- }
- }
- void X11Display::getShifts( uint32_t mask, int &rLeftShift,
- int &rRightShift ) const
- {
- for( rLeftShift = 0; (rLeftShift < 32) && !(mask & 1); rLeftShift++ )
- {
- mask >>= 1;
- }
- for( rRightShift = 8; (mask & 1) ; rRightShift--)
- {
- mask >>= 1;
- }
- if( rRightShift < 0 )
- {
- rLeftShift -= rRightShift;
- rRightShift = 0;
- }
- }
- void X11Display::makePixel8( uint8_t *pPixel, uint8_t r, uint8_t g, uint8_t b,
- uint8_t a ) const
- {
- // Get the current pixel value
- uint8_t value = 255 - *pPixel;
- // Compute the new color values
- uint16_t temp;
- temp = ((uint8_t)((value >> m_redLeftShift) << m_redRightShift));
- uint8_t red = ( temp * (255 - a) + r * a ) / 255;
- temp = ((uint8_t)((value >> m_greenLeftShift) << m_greenRightShift));
- uint8_t green = ( temp * (255 - a) + g * a ) / 255;
- temp = ((uint8_t)((value >> m_blueLeftShift) << m_blueRightShift));
- uint8_t blue = ( temp * (255 - a) + b * a ) / 255;
- // Set the new pixel value
- value =
- ( ((uint8_t)red >> m_redRightShift) << m_redLeftShift ) |
- ( ((uint8_t)green >> m_greenRightShift) << m_greenLeftShift ) |
- ( ((uint8_t)blue >> m_blueRightShift) << m_blueLeftShift );
- *pPixel = 255 - value;
- }
- void X11Display::makePixel16MSB( uint8_t *pPixel, uint8_t r, uint8_t g,
- uint8_t b, uint8_t a ) const
- {
- // Get the current pixel value
- uint16_t value = pPixel[1] | pPixel[0] << 8;
- // Compute the new color values
- uint16_t temp;
- temp = ((uint8_t)((value >> m_redLeftShift) << m_redRightShift));
- uint8_t red = ( temp * (255 - a) + r * a ) / 255;
- temp = ((uint8_t)((value >> m_greenLeftShift) << m_greenRightShift));
- uint8_t green = ( temp * (255 - a) + g * a ) / 255;
- temp = ((uint8_t)((value >> m_blueLeftShift) << m_blueRightShift));
- uint8_t blue = ( temp * (255 - a) + b * a ) / 255;
- // Set the new pixel value
- value =
- ( ((uint16_t)red >> m_redRightShift) << m_redLeftShift ) |
- ( ((uint16_t)green >> m_greenRightShift) << m_greenLeftShift ) |
- ( ((uint16_t)blue >> m_blueRightShift) << m_blueLeftShift );
- pPixel[1] = value;
- value >>= 8;
- pPixel[0] = value;
- }
- void X11Display::makePixel16LSB( uint8_t *pPixel, uint8_t r, uint8_t g,
- uint8_t b, uint8_t a ) const
- {
- // Get the current pixel value
- uint16_t value = pPixel[0] | pPixel[1] << 8;
- // Compute the new color values
- uint16_t temp;
- temp = ((uint8_t)((value >> m_redLeftShift) << m_redRightShift));
- uint8_t red = ( temp * (255 - a) + r * a ) / 255;
- temp = ((uint8_t)((value >> m_greenLeftShift) << m_greenRightShift));
- uint8_t green = ( temp * (255 - a) + g * a ) / 255;
- temp = ((uint8_t)((value >> m_blueLeftShift) << m_blueRightShift));
- uint8_t blue = ( temp * (255 - a) + b * a ) / 255;
- // Set the new pixel value
- value =
- ( ((uint16_t)red >> m_redRightShift) << m_redLeftShift ) |
- ( ((uint16_t)green >> m_greenRightShift) << m_greenLeftShift ) |
- ( ((uint16_t)blue >> m_blueRightShift) << m_blueLeftShift );
- pPixel[0] = value;
- value >>= 8;
- pPixel[1] = value;
- }
- void X11Display::makePixel32MSB( uint8_t *pPixel, uint8_t r, uint8_t g,
- uint8_t b, uint8_t a ) const
- {
- // Get the current pixel value
- uint32_t value = pPixel[3] | pPixel[2] << 8 | pPixel[1] << 16 |
- pPixel[0] << 24;
- // Compute the new color values
- uint16_t temp;
- temp = ((uint8_t)((value >> m_redLeftShift) << m_redRightShift));
- uint8_t red = ( temp * (255 - a) + r * a ) / 255;
- temp = ((uint8_t)((value >> m_greenLeftShift) << m_greenRightShift));
- uint8_t green = ( temp * (255 - a) + g * a ) / 255;
- temp = ((uint8_t)((value >> m_blueLeftShift) << m_blueRightShift));
- uint8_t blue = ( temp * (255 - a) + b * a ) / 255;
- // Set the new pixel value
- value =
- ( ((uint32_t)red >> m_redRightShift) << m_redLeftShift ) |
- ( ((uint32_t)green >> m_greenRightShift) << m_greenLeftShift ) |
- ( ((uint32_t)blue >> m_blueRightShift) << m_blueLeftShift );
- pPixel[3] = value;
- value >>= 8;
- pPixel[2] = value;
- value >>= 8;
- pPixel[1] = value;
- value >>= 8;
- pPixel[0] = value;
- }
- void X11Display::makePixel32LSB( uint8_t *pPixel, uint8_t r, uint8_t g,
- uint8_t b, uint8_t a ) const
- {
- // Get the current pixel value
- uint32_t value = pPixel[0] | pPixel[1] << 8 | pPixel[2] << 16 |
- pPixel[3] << 24;
- // Compute the new color values
- uint16_t temp;
- temp = ((uint8_t)((value >> m_redLeftShift) << m_redRightShift));
- uint8_t red = ( temp * (255 - a) + r * a ) / 255;
- temp = ((uint8_t)((value >> m_greenLeftShift) << m_greenRightShift));
- uint8_t green = ( temp * (255 - a) + g * a ) / 255;
- temp = ((uint8_t)((value >> m_blueLeftShift) << m_blueRightShift));
- uint8_t blue = ( temp * (255 - a) + b * a ) / 255;
- // Set the new pixel value
- value =
- ( ((uint32_t)red >> m_redRightShift) << m_redLeftShift ) |
- ( ((uint32_t)green >> m_greenRightShift) << m_greenLeftShift ) |
- ( ((uint32_t)blue >> m_blueRightShift) << m_blueLeftShift );
- pPixel[0] = value;
- value >>= 8;
- pPixel[1] = value;
- value >>= 8;
- pPixel[2] = value;
- value >>= 8;
- pPixel[3] = value;
- }
- unsigned long X11Display::getPixelValue( uint8_t r, uint8_t g, uint8_t b ) const
- {
- unsigned long value;
- value = ( ((uint32_t)r >> m_redRightShift) << m_redLeftShift ) |
- ( ((uint32_t)g >> m_greenRightShift) << m_greenLeftShift ) |
- ( ((uint32_t)b >> m_blueRightShift) << m_blueLeftShift );
- if( m_pixelSize == 1 )
- {
- return 255 - value;
- }
- else
- {
- return value;
- }
- }
- #endif