/*
* Copyright (C) 2003-2006 Gabest
* http://www.gabest.org
*
* 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, 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 GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include <stdio.h>
#include <malloc.h>
#include "libpng.h"
#include "..\..\libpng\png.h"
static void read_data_fn(png_structp png_ptr, png_bytep data, png_size_t length)
{
struct png_t* png = (struct png_t*)png_get_progressive_ptr(png_ptr);
if(png->pos + length > png->size) png_error(png_ptr, "Read Error");
memcpy(data, &png->data[png->pos], length);
png->pos += length;
}
unsigned char* DecompressPNG(struct png_t* png, int* w, int* h)
{
png_structp png_ptr;
png_infop info_ptr;
png_infop end_info;
unsigned char* pic;
unsigned char* row;
unsigned int x, y, c;
if(png_sig_cmp(png->data, 0, 8) != 0)
return NULL;
png->pos = 8;
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
// (png_voidp)user_error_ptr, user_error_fn, user_warning_fn);
if(!png_ptr)
return NULL;
png_set_read_fn(png_ptr, (png_voidp)png, read_data_fn);
info_ptr = png_create_info_struct(png_ptr);
if(!info_ptr)
{
png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
return NULL;
}
end_info = png_create_info_struct(png_ptr);
if(!end_info)
{
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
return NULL;
}
if(setjmp(png_jmpbuf(png_ptr)))
{
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
}
png_set_sig_bytes(png_ptr, 8);
png_read_png(
png_ptr, info_ptr,
PNG_TRANSFORM_STRIP_16 |
PNG_TRANSFORM_STRIP_ALPHA |
PNG_TRANSFORM_PACKING |
PNG_TRANSFORM_EXPAND |
PNG_TRANSFORM_BGR,
NULL);
if(png_get_channels(png_ptr, info_ptr) != 3)
{
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return NULL;
}
pic = calloc(info_ptr->width * info_ptr->height, 4);
*w = info_ptr->width;
*h = info_ptr->height;
for(y = 0; y < info_ptr->height; y++)
{
row = &pic[y * info_ptr->width * 4];
for(x = 0; x < info_ptr->width*3; row += 4)
{
for(c = 0; c < 3; c++)
{
row[c] = info_ptr->row_pointers[y][x++];
}
}
}
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
return pic;
}
暴风影音VC++源码
需积分: 9 182 浏览量
2008-09-25
23:46:46
上传
评论 2
收藏 1.45MB RAR 举报
暴风影音VC++源码 （800个子文件） 
all-wcprops 26KB all-wcprops 6KB all-wcprops 3KB all-wcprops 2KB
ani.avi 15KB
authhdrpic.bmp 56KB streamtypes.bmp 7KB toolbar1.bmp 2KB stereo.bmp 2KB noaudio.bmp 2KB mono.bmp 2KB onoff.bmp 358B libpng.c 3KB MainFrm.cpp 254KB mplayerc.cpp 83KB DX9AllocatorPresenter.cpp 63KB FGManager.cpp 57KB PlayerCaptureDialog.cpp 44KB DX7AllocatorPresenter.cpp 37KB PlayerPlaylistBar.cpp 36KB PlayerSubresyncBar.cpp 35KB ConvertDlg.cpp 33KB PPageAccelTbl.cpp 33KB LineNumberEdit.cpp 29KB PlayerListCtrl.cpp 21KB PPageFormats.cpp 21KB FakeFilterMapper2.cpp 20KB RealMediaGraph.cpp 20KB PPageExternalFilters.cpp 19KB WebServer.cpp 18KB WebClientSocket.cpp 18KB RealMediaWindowlessSite.cpp 18KB IPinHook.cpp 17KB OpenCapDeviceDlg.cpp 17KB QuicktimeGraph.cpp 16KB BaseGraph.cpp 16KB FGFilter.cpp 15KB ShaderAutoCompleteDlg.cpp 13KB ShaderEditorDlg.cpp 11KB PPageAudioSwitcher.cpp 11KB MediaFormats.cpp 10KB jpeg.cpp 8KB PPageDVD.cpp 8KB PPageInternalFilters.cpp 8KB PPageSubStyle.cpp 8KB PlayerStatusBar.cpp 8KB FavoriteOrganizeDlg.cpp 7KB PPageFileInfoDetails.cpp 7KB ChildView.cpp 7KB TextPassThruFilter.cpp 7KB PlayerSeekBar.cpp 7KB PPageWebServer.cpp 6KB ShockwaveGraph.cpp 6KB PlayerToolBar.cpp 6KB PnSPresetsDlg.cpp 6KB SaveDlg.cpp 6KB ComPropertySheet.cpp 6KB PPageOutput.cpp 6KB PPagePlayback.cpp 6KB Playlist.cpp 6KB PPagePlayer.cpp 6KB StaticLink.cpp 6KB OpenDlg.cpp 5KB ConvertPropsDlg.cpp 5KB PlayerInfoBar.cpp 5KB GoToDlg.cpp 5KB PPageLogo.cpp 5KB VolumeCtrl.cpp 5KB OpenFileDlg.cpp 5KB RegFilterChooserDlg.cpp 4KB MediaTypesDlg.cpp 4KB PPageFileInfoRes.cpp 4KB PPageSubtitles.cpp 4KB DeinterlacerFilter.cpp 4KB PPageTweaks.cpp 4KB AuthDlg.cpp 4KB SubtitleDlDlg.cpp 4KB PPageFileInfoClip.cpp 3KB FloatEdit.cpp 3KB ConvertResDlg.cpp 3KB ShaderCombineDlg.cpp 3KB PixelShaderCompiler.cpp 3KB PPageSubDB.cpp 3KB PPageSheet.cpp 3KB SaveTextFileDialog.cpp 3KB MacrovisionKicker.cpp 3KB StatusLabel.cpp 3KB SelectMediaType.cpp 3KB ComPropertyPage.cpp 3KB SaveThumbnailsDialog.cpp 3KB PPageBase.cpp 3KB FileDropTarget.cpp 2KB ConvertChapDlg.cpp 2KB FavoriteAddDlg.cpp 2KB PlayerShaderEditorBar.cpp 2KB PPageFileInfoSheet.cpp 2KB PlayerCaptureBar.cpp 2KB ISDb.cpp 2KB KeyProvider.cpp 2KB CShockwaveFlash.cpp 1KB共 800 条
- 1
- 2
- 3
- 4
- 5
- 6
- 8
资源评论
