diff options
Diffstat (limited to 'DevIL/examples/register_read_example')
-rw-r--r-- | DevIL/examples/register_read_example/readtest.c | 108 |
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 index 00000000..b24113b1 --- /dev/null +++ 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; +} |