Initial check in for pnginfo, command line program for displaying info about PNG image files
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@7271 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Matthew Wilber
@@ -0,0 +1,7 @@
|
|||||||
|
SubDir OBOS_TOP src tools translation pnginfo ;
|
||||||
|
|
||||||
|
UseLibraryHeaders zlib ;
|
||||||
|
UseLibraryHeaders png ;
|
||||||
|
|
||||||
|
BinCommand pnginfo : pnginfo.cpp : be libpng.a libz.a ;
|
||||||
|
|
||||||
@@ -0,0 +1,238 @@
|
|||||||
|
/*****************************************************************************/
|
||||||
|
// pnginfo
|
||||||
|
// Written by Michael Wilber, OBOS Translation Kit Team
|
||||||
|
//
|
||||||
|
// Version:
|
||||||
|
//
|
||||||
|
// pnginfo is a command line program for displaying text information about
|
||||||
|
// PNG images.
|
||||||
|
//
|
||||||
|
// This application and all source files used in its construction, except
|
||||||
|
// where noted, are licensed under the MIT License, and have been written
|
||||||
|
// and are:
|
||||||
|
//
|
||||||
|
// Copyright (c) 2004 OpenBeOS Project
|
||||||
|
//
|
||||||
|
// Permission is hereby granted, free of charge, to any person obtaining a
|
||||||
|
// copy of this software and associated documentation files (the "Software"),
|
||||||
|
// to deal in the Software without restriction, including without limitation
|
||||||
|
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||||||
|
// and/or sell copies of the Software, and to permit persons to whom the
|
||||||
|
// Software is furnished to do so, subject to the following conditions:
|
||||||
|
//
|
||||||
|
// The above copyright notice and this permission notice shall be included
|
||||||
|
// in all copies or substantial portions of the Software.
|
||||||
|
//
|
||||||
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||||
|
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||||
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||||||
|
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||||
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||||
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||||
|
// DEALINGS IN THE SOFTWARE.
|
||||||
|
/*****************************************************************************/
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <png.h>
|
||||||
|
#include <ByteOrder.h>
|
||||||
|
#include <File.h>
|
||||||
|
#include <TranslatorFormats.h>
|
||||||
|
#include <StorageDefs.h>
|
||||||
|
|
||||||
|
/* The png_jmpbuf() macro, used in error handling, became available in
|
||||||
|
* libpng version 1.0.6. If you want to be able to run your code with older
|
||||||
|
* versions of libpng, you must define the macro yourself (but only if it
|
||||||
|
* is not already defined by libpng!).
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef png_jmpbuf
|
||||||
|
# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
//// libpng Callback functions!
|
||||||
|
BPositionIO *
|
||||||
|
get_pio(png_structp ppng)
|
||||||
|
{
|
||||||
|
BPositionIO *pio = NULL;
|
||||||
|
pio = static_cast<BPositionIO *>(png_get_io_ptr(ppng));
|
||||||
|
return pio;
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
pngcb_read_data(png_structp ppng, png_bytep pdata, png_size_t length)
|
||||||
|
{
|
||||||
|
BPositionIO *pio = get_pio(ppng);
|
||||||
|
pio->Read(pdata, static_cast<size_t>(length));
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
pngcb_write_data(png_structp ppng, png_bytep pdata, png_size_t length)
|
||||||
|
{
|
||||||
|
BPositionIO *pio = get_pio(ppng);
|
||||||
|
pio->Write(pdata, static_cast<size_t>(length));
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
pngcb_flush_data(png_structp ppng)
|
||||||
|
{
|
||||||
|
// I don't think I really need to do anything here
|
||||||
|
}
|
||||||
|
//// End: libpng Callback functions
|
||||||
|
|
||||||
|
void
|
||||||
|
PrintPNGInfo(const char *path)
|
||||||
|
{
|
||||||
|
printf("\n\n--- %s ---\n", path);
|
||||||
|
|
||||||
|
BFile *pfile;
|
||||||
|
pfile = new BFile(path, B_READ_ONLY);
|
||||||
|
if (!pfile || pfile->InitCheck() != B_OK) {
|
||||||
|
printf("Error: unable to open the file\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
BPositionIO *pio = static_cast<BPositionIO *>(pfile);
|
||||||
|
|
||||||
|
const int32 kSigSize = 8;
|
||||||
|
uint8 buf[kSigSize];
|
||||||
|
if (pio->Read(buf, kSigSize) != kSigSize) {
|
||||||
|
printf("Error: unable to read PNG signature\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
if (!png_check_sig(buf, kSigSize)) {
|
||||||
|
// if first 8 bytes of stream don't match PNG signature bail
|
||||||
|
printf("File doesn't begin with PNG signature\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
// use libpng to get info about the file
|
||||||
|
png_structp ppng = NULL;
|
||||||
|
png_infop pinfo = NULL;
|
||||||
|
while (ppng == NULL) {
|
||||||
|
// create PNG read pointer with default error handling routines
|
||||||
|
ppng = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
||||||
|
if (!ppng)
|
||||||
|
break;
|
||||||
|
// alocate / init memory for image information
|
||||||
|
pinfo = png_create_info_struct(ppng);
|
||||||
|
if (!pinfo)
|
||||||
|
break;
|
||||||
|
// set error handling
|
||||||
|
if (setjmp(png_jmpbuf(ppng)))
|
||||||
|
// When an error occurs in libpng, it uses
|
||||||
|
// the longjmp function to continue execution
|
||||||
|
// from this point
|
||||||
|
break;
|
||||||
|
|
||||||
|
// set read callback function
|
||||||
|
png_set_read_fn(ppng, static_cast<void *>(pio), pngcb_read_data);
|
||||||
|
|
||||||
|
// Read in PNG image info
|
||||||
|
png_set_sig_bytes(ppng, 8);
|
||||||
|
png_read_info(ppng, pinfo);
|
||||||
|
|
||||||
|
png_uint_32 width, height;
|
||||||
|
int bit_depth, color_type, interlace_type, compression_type, filter_type;
|
||||||
|
png_get_IHDR(ppng, pinfo, &width, &height, &bit_depth, &color_type,
|
||||||
|
&interlace_type, &compression_type, &filter_type);
|
||||||
|
|
||||||
|
printf(" width: %u\n", width);
|
||||||
|
printf(" height: %u\n", height);
|
||||||
|
printf(" row bytes: %u\n", pinfo->rowbytes);
|
||||||
|
printf("bit depth (bits/channel): %d\n", bit_depth);
|
||||||
|
printf(" channels: %d\n", pinfo->channels);
|
||||||
|
printf("pixel depth (bits/pixel): %d\n", pinfo->pixel_depth);
|
||||||
|
printf(" color type: ");
|
||||||
|
const char *desc = NULL;
|
||||||
|
switch (color_type) {
|
||||||
|
case PNG_COLOR_TYPE_GRAY:
|
||||||
|
desc = "Grayscale";
|
||||||
|
break;
|
||||||
|
case PNG_COLOR_TYPE_PALETTE:
|
||||||
|
desc = "Palette";
|
||||||
|
break;
|
||||||
|
case PNG_COLOR_TYPE_RGB:
|
||||||
|
desc = "RGB";
|
||||||
|
break;
|
||||||
|
case PNG_COLOR_TYPE_RGB_ALPHA:
|
||||||
|
desc = "RGB + Alpha";
|
||||||
|
break;
|
||||||
|
case PNG_COLOR_TYPE_GRAY_ALPHA:
|
||||||
|
desc = "Grayscale + Alpha";
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
desc = "Unknown";
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
printf("%s (%d)\n", desc, color_type);
|
||||||
|
|
||||||
|
printf(" interlacing: ");
|
||||||
|
switch (interlace_type) {
|
||||||
|
case PNG_INTERLACE_NONE:
|
||||||
|
desc = "None";
|
||||||
|
break;
|
||||||
|
case PNG_INTERLACE_ADAM7:
|
||||||
|
desc = "Adam7";
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
desc = "Unknown";
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
printf("%s (%d)\n", desc, interlace_type);
|
||||||
|
|
||||||
|
printf(" compression type: ");
|
||||||
|
switch (compression_type) {
|
||||||
|
case PNG_COMPRESSION_TYPE_DEFAULT:
|
||||||
|
desc = "Default: Deflate method 8, 32K window";
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
desc = "Unknown";
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
printf("%s (%d)\n", desc, compression_type);
|
||||||
|
|
||||||
|
printf(" filter type: ");
|
||||||
|
switch (filter_type) {
|
||||||
|
case PNG_FILTER_TYPE_DEFAULT:
|
||||||
|
desc = "Single row per-byte";
|
||||||
|
break;
|
||||||
|
case PNG_INTRAPIXEL_DIFFERENCING:
|
||||||
|
desc = "Intrapixel Differencing [for MNG files]";
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
desc = "Unknown";
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
printf("%s (%d)\n", desc, filter_type);
|
||||||
|
}
|
||||||
|
if (ppng) {
|
||||||
|
// free PNG handle / info structures
|
||||||
|
if (!pinfo)
|
||||||
|
png_destroy_read_struct(&ppng, png_infopp_NULL, png_infopp_NULL);
|
||||||
|
else
|
||||||
|
png_destroy_read_struct(&ppng, &pinfo, png_infopp_NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
delete pfile;
|
||||||
|
pfile = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
main(int argc, char **argv)
|
||||||
|
{
|
||||||
|
if (argc == 1) {
|
||||||
|
printf("\npnginfo - reports information about PNG images\n");
|
||||||
|
printf("\nUsage:\n");
|
||||||
|
printf("pnginfo [options] filename.png\n\n");
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
int32 first = 1;
|
||||||
|
for (int32 i = first; i < argc; i++)
|
||||||
|
PrintPNGInfo(argv[i]);
|
||||||
|
}
|
||||||
|
|
||||||
|
printf("\n");
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
Reference in New Issue
Block a user