mirror of
https://github.com/love2d/megasource.git
synced 2026-08-17 19:24:09 +02:00
rude
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
//-----------------------------------------------------------------------------
|
|
//
|
|
// 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.
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif /* HAVE_CONFIG_H */
|
|
|
|
#include <IL/il.h>
|
|
#include <stdio.h>
|
|
|
|
/* We would need ILU just because of iluErrorString() function... */
|
|
/* So make it possible for both with and without ILU! */
|
|
#ifdef ILU_ENABLED
|
|
#include <IL/ilu.h>
|
|
#define PRINT_ERROR_MACRO printf("Error: %s\n", iluErrorString(Error))
|
|
#else /* not ILU_ENABLED */
|
|
#define PRINT_ERROR_MACRO printf("Error: 0x%X\n", (unsigned int)Error)
|
|
#endif /* not ILU_ENABLED */
|
|
|
|
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) {
|
|
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())) {
|
|
PRINT_ERROR_MACRO;
|
|
}
|
|
|
|
return 0;
|
|
}
|