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Diffstat (limited to 'utils/mxtk/mxtga.cpp')
| -rw-r--r-- | utils/mxtk/mxtga.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/utils/mxtk/mxtga.cpp b/utils/mxtk/mxtga.cpp new file mode 100644 index 0000000..addedf3 --- /dev/null +++ b/utils/mxtk/mxtga.cpp @@ -0,0 +1,140 @@ +// +// mxToolKit (c) 1999 by Mete Ciragan +// +// file: mxTga.cpp +// implementation: all +// last modified: Apr 15 1999, Mete Ciragan +// copyright: The programs and associated files contained in this +// distribution were developed by Mete Ciragan. The programs +// are not in the public domain, but they are freely +// distributable without licensing fees. These programs are +// provided without guarantee or warrantee expressed or +// implied. +// +#include "mxtk/mxTga.h" +#include <stdio.h> +#include <stdlib.h> + + + +mxImage * +mxTgaRead (const char *filename) +{ + FILE *file; + file = fopen (filename, "rb"); + if (!file) + return 0; + + byte identFieldLength; + byte colorMapType; + byte imageTypeCode; + fread (&identFieldLength, sizeof (byte), 1, file); + fread (&colorMapType, sizeof (byte), 1, file); + fread (&imageTypeCode, sizeof (byte), 1, file); + + fseek (file, 12, SEEK_SET); + + word width, height; + byte pixelSize; + fread (&width, sizeof (word), 1, file); + fread (&height, sizeof (word), 1, file); + fread (&pixelSize, sizeof (byte), 1, file); + + // only 24-bit RGB uncompressed + if (colorMapType != 0 || + imageTypeCode != 2 || + pixelSize != 24) + { + fclose (file); + return 0; + } + + fseek (file, 18 + identFieldLength, SEEK_SET); + + mxImage *image = new mxImage (); + if (!image->create (width, height, 24)) + { + delete image; + fclose (file); + return 0; + } + + byte *data = (byte *) image->data; + for (int y = 0; y < height; y++) + { + byte *scanline = (byte *) &data[(height - y - 1) * width * 3]; + for (int x = 0; x < width; x++) + { + scanline[x * 3 + 2] = (byte) fgetc (file); + scanline[x * 3 + 1] = (byte) fgetc (file); + scanline[x * 3 + 0] = (byte) fgetc (file); + //scanline[x * 4 + 3] = 0xff; + } + } + + fclose (file); + + return image; +} + + + +bool +mxTgaWrite (const char *filename, mxImage *image) +{ + if (!image) + return false; + + if (image->bpp != 24) + return false; + + FILE *file = fopen (filename, "wb"); + if (!file) + return false; + + // + // write header + // + fputc (0, file); // identFieldLength + fputc (0, file); // colorMapType == 0, no color map + fputc (2, file); // imageTypeCode == 2, uncompressed RGB + + word w = 0; + fwrite (&w, sizeof (word), 1, file); // colorMapOrigin + fwrite (&w, sizeof (word), 1, file); // colorMapLength + fputc (0, file); // colorMapEntrySize + + fwrite (&w, sizeof (word), 1, file); // imageOriginX + fwrite (&w, sizeof (word), 1, file); // imageOriginY + + w = (word) image->width; + fwrite (&w, sizeof (word), 1, file); // imageWidth + + w = (word) image->height; + fwrite (&w, sizeof (word), 1, file); // imageHeight + + fputc (24, file); // imagePixelSize + fputc (0, file); // imageDescriptorByte + + // write no ident field + + // write no color map + + // write imagedata + + byte *data = (byte *) image->data; + for (int y = 0; y < image->height; y++) + { + byte *scanline = (byte *) &data[(image->height - y - 1) * image->width * 3]; + for (int x = 0; x < image->width; x++) + { + fputc ((byte) scanline[x * 3 + 2], file); + fputc ((byte) scanline[x * 3 + 1], file); + fputc ((byte) scanline[x * 3 + 0], file); + } + } + + fclose (file); + + return true; +}
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