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415 lines
9.8 KiB
415 lines
9.8 KiB
/**********************************************************************
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of TQt/Embedded virtual framebuffer.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free TQt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** Licensees holding valid TQt Commercial licenses may use this file in
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** accordance with the TQt Commercial License Agreement provided with
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** the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#include "qanimationwriter.h"
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#define QT_CLEAN_NAMESPACE
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#include <ntqfile.h>
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#include <png.h>
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#include <netinet/in.h> // for htonl
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class TQAnimationWriterData {
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public:
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TQAnimationWriterData(TQIODevice* d) : dev(d)
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{
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framerate = 1000;
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}
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void setFrameRate(int d) { framerate = d; }
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virtual ~TQAnimationWriterData() { }
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virtual void setImage(const TQImage& src)=0;
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virtual bool canCompose() const { return FALSE; }
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virtual void composeImage(const TQImage&, const TQPoint& ) { }
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protected:
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int framerate;
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TQIODevice* dev;
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};
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class TQAnimationWriterMNG : public TQAnimationWriterData {
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bool first;
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png_structp png_ptr;
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png_infop info_ptr;
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public:
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TQAnimationWriterMNG(TQIODevice* d) : TQAnimationWriterData(d)
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{
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first = TRUE;
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begin_png();
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}
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~TQAnimationWriterMNG()
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{
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if ( first ) {
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// Eh? Not images.
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TQImage dummy(1,1,32);
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setImage(dummy);
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}
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writeMEND();
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end_png();
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}
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void begin_png()
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{
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png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,0,0,0);
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info_ptr = png_create_info_struct(png_ptr);
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png_set_compression_level(png_ptr,9);
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png_set_write_fn(png_ptr, (void*)this, write, 0);
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}
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void end_png()
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{
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png_destroy_write_struct(&png_ptr, &info_ptr);
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}
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static void write( png_structp png_ptr, png_bytep data, png_size_t length)
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{
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TQAnimationWriterMNG* that = (TQAnimationWriterMNG*)png_get_io_ptr(png_ptr);
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/*uint nw =*/ that->dev->writeBlock((const char*)data,length);
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}
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void writePNG(const TQImage& image)
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{
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info_ptr->channels = 4;
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png_set_sig_bytes(png_ptr, 8); // Pretend we already wrote the sig
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png_set_IHDR(png_ptr, info_ptr, image.width(), image.height(),
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8, image.hasAlphaBuffer()
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? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB,
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0, 0, 0);
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png_write_info(png_ptr, info_ptr);
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if ( !image.hasAlphaBuffer() )
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png_set_filler(png_ptr, 0,
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TQImage::systemByteOrder() == TQImage::BigEndian ?
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PNG_FILLER_BEFORE : PNG_FILLER_AFTER);
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//if ( TQImage::systemByteOrder() == TQImage::BigEndian ) {
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//png_set_swap_alpha(png_ptr);
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//}
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if ( TQImage::systemByteOrder() == TQImage::LittleEndian ) {
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png_set_bgr(png_ptr);
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}
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png_bytep* row_pointers;
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uint height = image.height();
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uchar** jt = image.jumpTable();
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row_pointers=new png_bytep[height];
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uint y;
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for (y=0; y<height; y++) {
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row_pointers[y]=jt[y];
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}
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png_write_image(png_ptr, row_pointers);
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delete [] row_pointers;
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png_write_end(png_ptr, info_ptr);
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end_png();
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begin_png();
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}
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void writeMHDR( const TQSize& size, int framerate )
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{
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dev->writeBlock("\212MNG\r\n\032\n", 8);
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struct {
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int width;
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int height;
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int framerate;
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int a,b,c;
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int profile;
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} chunk;
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chunk.width = htonl(size.width());
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chunk.height = htonl(size.height());
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chunk.framerate = htonl(framerate);
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chunk.a=0;
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chunk.b=0;
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chunk.c=0;
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chunk.profile= htonl(0x00000003);
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png_write_chunk(png_ptr, (png_byte*)"MHDR", (png_byte*)&chunk, sizeof(chunk));
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}
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void writeMEND()
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{
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png_write_chunk(png_ptr, (png_byte*)"MEND", 0, 0);
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}
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void writeDEFI( const TQPoint& offset, const TQSize& size )
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{
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struct {
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ushort o;
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uchar s;
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uchar concrete;
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int x,y;
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int lc,rc,tc,bc;
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} chunk;
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chunk.o=0;
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chunk.s=0;
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chunk.concrete=1;
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chunk.x=htonl(offset.x());
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chunk.y=htonl(offset.y());
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chunk.lc=0;
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chunk.rc=0;
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chunk.tc=htonl(INT_MAX);
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chunk.bc=htonl(INT_MAX);
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png_write_chunk(png_ptr, (png_byte*)"DEFI", (png_byte*)&chunk, sizeof(chunk));
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}
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void writeFRAM( const TQSize& size )
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{
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struct {
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uchar mode;
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uchar n;
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uchar nu;
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uchar d;
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uchar t;
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uchar clip;
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uchar s;
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uchar deltatype;
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uint left;
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uint right;
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uint top;
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uint bottom;
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} chunk;
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chunk.mode=1;
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chunk.n='a';
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chunk.nu=0;
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chunk.d=0;
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chunk.clip=1;
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chunk.t=0;
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chunk.s=0;
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chunk.deltatype=0;
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chunk.left=0;
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chunk.right=htonl(size.width());
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chunk.top=0;
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chunk.bottom=htonl(size.height());
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png_write_chunk(png_ptr, (png_byte*)"FRAM", (png_byte*)&chunk, sizeof(chunk));
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}
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void writeMOVE( const TQPoint& offset )
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{
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struct {
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uchar filler[3];
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uchar z[5];
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int x,y;
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} chunk;
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memset(chunk.z,0,5);
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chunk.x=htonl(offset.x());
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chunk.y=htonl(offset.y());
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png_write_chunk(png_ptr, (png_byte*)"MOVE", ((png_byte*)&chunk)+3, sizeof(chunk)-3);
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}
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void setImage(const TQImage& src)
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{
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if ( first ) {
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first = FALSE;
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writeMHDR(src.size(),framerate);
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}
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composeImage(src,TQPoint(0,0));
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}
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bool canCompose() const { return TRUE; }
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void composeImage(const TQImage& src, const TQPoint& offset)
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{
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writeMOVE(offset);
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//writeFRAM(src.size());
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writePNG(src);
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}
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};
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TQAnimationWriter::TQAnimationWriter( const TQString& filename, const char* format )
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{
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if ( TQCString(format) != "MNG" ) {
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tqWarning("Format \"%s\" not supported, only MNG", format);
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dev = 0;
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d = 0;
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} else {
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TQFile *f = new TQFile(filename);
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f->open(IO_WriteOnly);
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dev = f;
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d = new TQAnimationWriterMNG(dev);
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}
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}
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bool TQAnimationWriter::okay() const
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{
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return dev && dev->status() == IO_Ok;
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}
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TQAnimationWriter::~TQAnimationWriter()
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{
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delete d;
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delete dev;
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}
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void TQAnimationWriter::setFrameRate(int r)
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{
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if (d) d->setFrameRate(r);
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}
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void TQAnimationWriter::appendFrame(const TQImage& frm, const TQPoint& offset)
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{
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TQImage frame = frm.convertDepth(32);
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const int alignx = 1;
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if ( dev ) {
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if ( prev.isNull() || !d->canCompose() ) {
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d->setImage(frame);
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} else {
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bool done;
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int minx, maxx, miny, maxy;
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int w = frame.width();
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int h = frame.height();
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TQRgb** jt = (TQRgb**)frame.jumpTable();
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TQRgb** pjt = (TQRgb**)prev.jumpTable() + offset.y();
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// Find left edge of change
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done = FALSE;
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for (minx = 0; minx < w && !done; minx++) {
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for (int ty = 0; ty < h; ty++) {
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if ( jt[ty][minx] != pjt[ty][minx+offset.x()] ) {
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done = TRUE;
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break;
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}
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}
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}
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minx--;
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// Find right edge of change
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done = FALSE;
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for (maxx = w-1; maxx >= 0 && !done; maxx--) {
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for (int ty = 0; ty < h; ty++) {
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if ( jt[ty][maxx] != pjt[ty][maxx+offset.x()] ) {
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done = TRUE;
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break;
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}
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}
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}
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maxx++;
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// Find top edge of change
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done = FALSE;
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for (miny = 0; miny < h && !done; miny++) {
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for (int tx = 0; tx < w; tx++) {
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if ( jt[miny][tx] != pjt[miny][tx+offset.x()] ) {
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done = TRUE;
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break;
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}
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}
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}
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miny--;
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// Find right edge of change
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done = FALSE;
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for (maxy = h-1; maxy >= 0 && !done; maxy--) {
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for (int tx = 0; tx < w; tx++) {
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if ( jt[maxy][tx] != pjt[maxy][tx+offset.x()] ) {
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done = TRUE;
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break;
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}
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}
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}
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maxy++;
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if ( minx > maxx ) minx=maxx=0;
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if ( miny > maxy ) miny=maxy=0;
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if ( alignx > 1 ) {
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minx -= minx % alignx;
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maxx = maxx - maxx % alignx + alignx - 1;
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}
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int dw = maxx-minx+1;
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int dh = maxy-miny+1;
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TQImage diff(dw, dh, 32);
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diff.setAlphaBuffer(TRUE);
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int x, y;
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for (y = 0; y < dh; y++) {
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TQRgb* li = (TQRgb*)frame.scanLine(y+miny)+minx;
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TQRgb* lp = (TQRgb*)prev.scanLine(y+miny+offset.y())+minx+offset.x();
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TQRgb* ld = (TQRgb*)diff.scanLine(y);
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if ( alignx ) {
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for (x = 0; x < dw; x+=alignx) {
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int i;
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for (i=0; i<alignx; i++) {
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if ( li[x+i] != lp[x+i] )
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break;
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}
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if ( i == alignx ) {
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// All the same
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for (i=0; i<alignx; i++) {
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ld[x+i] = tqRgba(0,0,0,0);
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}
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} else {
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// Some different
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for (i=0; i<alignx; i++) {
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ld[x+i] = 0xff000000 | li[x+i];
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}
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}
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}
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} else {
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for (x = 0; x < dw; x++) {
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if ( li[x] != lp[x] )
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ld[x] = 0xff000000 | li[x];
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else
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ld[x] = tqRgba(0,0,0,0);
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}
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}
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}
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tqDebug("%d,%d %d,%d",minx,miny,offset.x(),offset.y());
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d->composeImage(diff,TQPoint(minx,miny)+offset);
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}
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if ( prev.isNull() || ( prev.size() == frame.size() && offset == TQPoint(0,0) ) ) {
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prev = frame;
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} else {
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bitBlt(&prev,offset.x(),offset.y(),&frame,0,0,frame.width(),frame.height());
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}
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}
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}
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void TQAnimationWriter::appendFrame(const TQImage& frm)
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{
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appendFrame(frm,TQPoint(0,0));
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}
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void TQAnimationWriter::appendBlankFrame()
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{
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TQImage i(1,1,32);
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i.setAlphaBuffer(TRUE);
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i.fill(0);
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d->composeImage(i,TQPoint(0,0));
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}
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