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//-----------------------------------------------------------------------------
//
// ImageLib Source Example
// Copyright (C) 2000-2001 by Denton Woods
// Last modified: 09/07/2001 <--Y2K Compliant! =]
//
// Filename: examples/register read/register read.c
//
// Description: An example of creating your own loading routine
// to use with DevIL -- uses a hypothetical format.
//
//-----------------------------------------------------------------------------
// Required include files.
#include <IL/il.h>
#include <IL/ilu.h>
#include <stdio.h>
ILboolean ILAPIENTRY LoadFunction(const char *FileName)
{
ILuint Width, Height;
FILE *f = fopen(FileName, "rb");
if (f == NULL)
return IL_FALSE;
fread(&Width, 1, 4, f);
fread(&Height, 1, 4, f);
if (!ilTexImage(Width, Height, 1, 3, IL_RGB, IL_UNSIGNED_BYTE, NULL)) {
fclose(f);
return IL_FALSE;
}
// Set the origin via the register functions.
ilRegisterOrigin(IL_ORIGIN_UPPER_LEFT);
fread(ilGetData(), 1, Width * Height * 3, f);
fclose(f);
return IL_TRUE;
}
int main(int argc, char **argv)
{
ILuint ImgId;
ILenum Error;
// We use the filename specified in the first argument of the command-line.
if (argc < 2) {
printf("Please specify a file to open.\n");
return 1;
}
// Check if the shared lib's version matches the executable's version.
if (ilGetInteger(IL_VERSION_NUM) < IL_VERSION ||
iluGetInteger(ILU_VERSION_NUM) < ILU_VERSION) {
printf("DevIL version is different...exiting!\n");
return 2;
}
// Initialize DevIL.
ilInit();
// Set the loading function here.
ilRegisterLoad("xxx", LoadFunction);
// Generate the main image name to use.
ilGenImages(1, &ImgId);
// Bind this image name.
ilBindImage(ImgId);
// Loads the image specified by File into the image named by ImgId.
if (!ilLoadImage(argv[1])) {
printf("Could not open file...exiting.\n");
return 3;
}
// Display the image's dimensions to the end user.
printf("Width: %d Height: %d Depth: %d Bpp: %d\n", ilGetInteger(IL_IMAGE_WIDTH),
ilGetInteger(IL_IMAGE_HEIGHT), ilGetInteger(IL_IMAGE_DEPTH), ilGetInteger(IL_IMAGE_BYTES_PER_PIXEL));
// Enable this to let us overwrite the destination file if it already exists.
ilEnable(IL_FILE_OVERWRITE);
// If argv[2] is present, we save to this filename, else we save to test.tga.
if (argc > 2)
ilSaveImage(argv[2]);
else
ilSaveImage("test.tga");
// Remove the loading function when we're done using it or want to change it.
// This isn't required here, since we're exiting, but here's how it's done:
ilRemoveLoad("xxx");
// We're done with the image, so let's delete it.
ilDeleteImages(1, &ImgId);
// Simple Error detection loop that displays the Error to the user in a human-readable form.
while ((Error = ilGetError())) {
printf("Error: %s\n", iluErrorString(Error));
}
return 0;
}
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