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https://github.com/TigerVNC/tigervnc.git
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![Constantin Kaplinsky](/assets/img/avatar_default.png)
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
173 lines
5.6 KiB
C++
173 lines
5.6 KiB
C++
/* Copyright (C) 2002-2004 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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// -=- PixelBuffer.h
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//
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// The PixelBuffer class encapsulates the PixelFormat and dimensions
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// of a block of pixel data.
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#ifndef __RFB_PIXEL_BUFFER_H__
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#define __RFB_PIXEL_BUFFER_H__
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#include <rfb/ImageGetter.h>
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#include <rfb/PixelFormat.h>
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#include <rfb/ColourMap.h>
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#include <rfb/Rect.h>
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#include <rfb/Pixel.h>
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namespace rfb {
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class Region;
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class PixelBuffer : public ImageGetter {
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public:
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PixelBuffer(const PixelFormat& pf, int width, int height, ColourMap* cm);
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virtual ~PixelBuffer();
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///////////////////////////////////////////////
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// Format / Layout
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//
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// Set/get pixel format & colourmap
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virtual void setPF(const PixelFormat &pf);
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virtual const PixelFormat &getPF() const;
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virtual ColourMap* getColourMap() const;
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// Get width, height and number of pixels
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int width() const { return width_; }
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int height() const { return height_; }
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int area() const { return width_ * height_; }
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// Get rectangle encompassing this buffer
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// Top-left of rectangle is either at (0,0), or the specified point.
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Rect getRect() const { return Rect(0, 0, width_, height_); }
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Rect getRect(const Point& pos) const {
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return Rect(pos, pos.translate(Point(width_, height_)));
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}
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///////////////////////////////////////////////
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// Access to pixel data
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//
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// Get a pointer into the buffer
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// The pointer is to the top-left pixel of the specified Rect.
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// The buffer stride (in pixels) is returned.
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virtual const rdr::U8* getPixelsR(const Rect& r, int* stride) = 0;
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// Get pixel data for a given part of the buffer
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// Data is copied into the supplied buffer, with the specified
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// stride.
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virtual void getImage(void* imageBuf, const Rect& r, int stride=0);
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// Get the data at (x,y) as a Pixel.
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// VERY INEFFICIENT!!!
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// *** Pixel getPixel(const Point& p);
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///////////////////////////////////////////////
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// Framebuffer update methods
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//
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// Ensure that the specified rectangle of buffer is up to date.
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// Overridden by derived classes implementing framebuffer access
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// to copy the required display data into place.
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virtual void grabRegion(const Region& region) {}
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protected:
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PixelBuffer();
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PixelFormat format;
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int width_, height_;
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ColourMap* colourmap;
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};
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// FullFramePixelBuffer
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class FullFramePixelBuffer : public PixelBuffer {
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public:
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FullFramePixelBuffer(const PixelFormat& pf, int width, int height,
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rdr::U8* data_, ColourMap* cm);
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virtual ~FullFramePixelBuffer();
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// - Get the number of pixels per row in the actual pixel buffer data area
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// This may in some cases NOT be the same as width().
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virtual int getStride() const;
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// Get a pointer to specified pixel data
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virtual rdr::U8* getPixelsRW(const Rect& r, int* stride);
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virtual const rdr::U8* getPixelsR(const Rect& r, int* stride) {
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return getPixelsRW(r, stride);
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}
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///////////////////////////////////////////////
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// Basic rendering operations
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// These operations DO NOT clip to the pixelbuffer area, or trap overruns.
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// Fill a rectangle
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virtual void fillRect(const Rect &dest, Pixel pix);
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// Copy pixel data to the buffer
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virtual void imageRect(const Rect &dest, const void* pixels, int stride=0);
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// Copy pixel data from one PixelBuffer location to another
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virtual void copyRect(const Rect &dest, const Point &move_by_delta);
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// Copy pixel data to the buffer through a mask
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// pixels is a pointer to the pixel to be copied to r.tl.
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// maskPos specifies the pixel offset in the mask to start from.
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// mask_ is a pointer to the mask bits at (0,0).
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// pStride and mStride are the strides of the pixel and mask buffers.
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virtual void maskRect(const Rect& r, const void* pixels, const void* mask_);
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// pixel is the Pixel value to be used where mask_ is set
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virtual void maskRect(const Rect& r, Pixel pixel, const void* mask_);
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// *** Should this be visible?
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rdr::U8* data;
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protected:
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FullFramePixelBuffer();
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};
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// -=- Managed pixel buffer class
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// Automatically allocates enough space for the specified format & area
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class ManagedPixelBuffer : public FullFramePixelBuffer {
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public:
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ManagedPixelBuffer();
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ManagedPixelBuffer(const PixelFormat& pf, int width, int height);
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virtual ~ManagedPixelBuffer();
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// Manage the pixel buffer layout
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virtual void setPF(const PixelFormat &pf);
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virtual void setSize(int w, int h);
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// Assign a colour map to the buffer
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virtual void setColourMap(ColourMap* cm, bool own_cm);
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// Return the total number of bytes of pixel data in the buffer
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int dataLen() const { return width_ * height_ * (format.bpp/8); }
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protected:
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unsigned long datasize;
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bool own_colourmap;
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void checkDataSize();
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};
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};
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#endif // __RFB_PIXEL_BUFFER_H__
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