1 files changed, 108 insertions, 0 deletions
diff --git a/DevIL/examples/register_read_example/readtest.c b/DevIL/examples/register_read_example/readtest.c
new file mode 100644
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+++ b/DevIL/examples/register_read_example/readtest.c
@@ -0,0 +1,108 @@
+//-----------------------------------------------------------------------------
+//
+// 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;
+}