/* This example use of imageio.library loads the image file specified
		on the command line at half size and saves it to the file 'ram:test'.
*/

#include <stdio.h>

#include <dos/dos.h>
#include <exec/memory.h>
#include <exec/types.h>

#include <clib/dos_protos.h>
#include <clib/exec_protos.h>
#include <clib/cybergraphics_protos.h>
#include <clib/intuition_protos.h>

#include <pragmas/dos_pragmas.h>
#include <pragmas/exec_pragmas.h>
#include <pragmas/intuition_pragmas.h>
#include <pragmas/cybergraphics_pragmas.h>

#include <cybergraphics/cybergraphics.h>

#include <imageio/imageio.h>
#include <imageio/imageio_protos.h>
#include <imageio/imageio_pragmas.h>

#include <guigfx/guigfx.h>
#include <pragmas/guigfx_pragmas.h>
#include <guigfx/guigfx_protos.h>

/* Function prototypes */
__saveds __asm ULONG progressFunc( register __d0 ULONG curr, register __d1 ULONG lines, register __a0 void *userdata );

extern struct Library *DOSBase;
struct Library *ImageIOBase, *IntuitionBase;

void main( int argc, char **argv )
{
	if ( argv[1] != NULL )
	{
		ImageIOBase = OpenLibrary( "imageio.library", 2 );
		IntuitionBase = OpenLibrary( "intuition.library", NULL );
		if ( IntuitionBase && ImageIOBase )
		{
			struct ImageHandle *ih;
			ULONG err;
			BPTR fp;

			fp = Open( argv[1], MODE_OLDFILE );
			if ( fp != NULL )
			{
				err = AllocImage( &ih, IMG_SrcFile, fp, TAG_DONE );
				if ( !err )
				{
					ULONG num = 1, denom = 2;
					ULONG x, y, bpp, rs;
					UBYTE *buffer, cs, it;

					err = GetImageAttrs( ih,
						IMG_Width, &x,
						IMG_Height,&y,
						IMG_BytesPerPixel, &bpp,
						IMG_ColourSpace, &cs,
						IMG_RowSize, &rs,
						IMG_TestScaleNum, num,
						IMG_TestScaleDenom, denom,
						TAG_DONE );
					if ( !err )
					{
						printf( "width=%ld, height=%ld\n", x, y );
						printf( "bytes per pixel=%ld, colourspace=%d\n", bpp, cs );
						printf( "row size=%ld\n", rs );

						err = ReadImage( ih,
							IMG_ScaleNum, num,
							IMG_ScaleDenom, denom,
							IMG_ImageBuffer, &buffer,
							IMG_ProgressHook, progressFunc,
							TAG_DONE );
						if ( !err )
						{
							err = GetImageAttrs( ih,
								IMG_ImageType, &it,
								TAG_DONE );
							if ( !err )
							{
								printf("Image type=%d\n",it);
								printf("Image buffer=%ld\n",buffer);
							}

							/* Save the image */
							{
								UBYTE saveable;
								struct ImageHandle *memih;
								UBYTE *newbuffer;

								err = AllocImage( &memih,
									IMG_RGBBuffer, buffer,
									IMG_Width, x,
									IMG_Height, y,
									IMG_ColourSpace, IRCS_RGB,
									IMG_BytesPerPixel, 3,
									TAG_DONE );
								if ( !err )
								{
									saveable = IMGF_JPEG;
									err = GetImageAttrs( memih,
										IMG_QuerySaveable, &saveable,
										TAG_DONE );
									if ( !err )
									{
										printf( "can save in JPEG: %s\n", saveable == 1 ? "Yes" : "No" );
									}

									if ( saveable == 1 )
									{
										err = GetImageAttrs( memih,
											IMG_Width, &x,
											IMG_Height,&y,
											IMG_BytesPerPixel, &bpp,
											IMG_ColourSpace, &cs,
											IMG_RowSize, &rs,
											IMG_ImageBuffer, &newbuffer,
											TAG_DONE );
										if ( !err )
										{
											printf( "width=%ld, height=%ld\n", x, y );
											printf( "bytes per pixel=%ld, colourspace=%d\n", bpp, cs );
											printf( "row size=%ld\n", rs );
											printf( "new buffer=%ld\n", newbuffer );
										}

										err = WriteImage( memih, IMGF_JPEG, "ram:test",
											IMG_ProgressHook, progressFunc,
											IMG_JPEG_Quality, 90,
											TAG_DONE );
										if ( !err )
										{
											printf("Image saved\n");
										}
										else printf( "write image error:%d\n", err );
									}

									FreeImage( memih );
								}
								else printf( "alloc image failed:%d\n", err );
							}
						}
						else printf( "read image error:%d\n", err );
					}
					else printf( "get image attrs error:%d\n", err );

					FreeImage( ih );
				}
				else printf( "alloc image error:%d\n", err );

				Close( fp );
			}
			else printf( "cant open file\n" );
		}

		if ( ImageIOBase ) CloseLibrary( ImageIOBase );
		if ( IntuitionBase ) CloseLibrary ( IntuitionBase );
	}
	else printf( "no file specified\n" );
}

__saveds __asm ULONG progressFunc( register __d0 ULONG curr, register __d1 ULONG lines, register __a0 void *userdata )
{
	static int prevpercent = 0;

	int percent = ( curr * 100 ) / lines;

	if ( prevpercent != percent )
	{
		if ( percent % 10 == 0 ) printf( "%d%%\n", percent );
	}

	prevpercent = percent;

	return NULL;
}