diff options
Diffstat (limited to 'q3radiant/Bmp.cpp')
| -rwxr-xr-x | q3radiant/Bmp.cpp | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/q3radiant/Bmp.cpp b/q3radiant/Bmp.cpp new file mode 100755 index 0000000..adda9a9 --- /dev/null +++ b/q3radiant/Bmp.cpp @@ -0,0 +1,417 @@ +/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. + +This file is part of Quake III Arena source code. + +Quake III Arena source code is free software; you can redistribute it +and/or modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 2 of the License, +or (at your option) any later version. + +Quake III Arena source code is distributed in the hope that it will be +useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with Foobar; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +=========================================================================== +*/ +
+#include "stdafx.h"
+#include <stdio.h>
+#include <malloc.h>
+#include <string.h>
+
+#include "bmp.h"
+
+
+void Error(char *fmt, ...);
+
+
+static int GetColorCount(int nbits)
+{
+ int ncolors = 0;
+
+ if (nbits < 24)
+ {
+ ncolors = 1 << nbits;
+ }
+
+ return(ncolors);
+}
+
+
+static void BMPLineNone(FILE *f, char *sline, int pixbytes, int width)
+{
+ int nbytes, i, k, j;
+
+ switch (pixbytes)
+ {
+ case 1 :
+ nbytes = (width + 3) / 4;
+ nbytes *= 4;
+
+ fread(sline, width, 1, f);
+ nbytes -= width;
+
+ while (nbytes-- > 0) fgetc(f);
+ return;
+
+ case 3 :
+ nbytes = ((width * 3) + 3) / 4;
+ nbytes *= 4;
+
+ fread(sline, width, 3, f);
+ nbytes -= width * 3;
+
+ while (nbytes-- > 0) fgetc(f);
+
+ // reorder bgr to rgb
+ for (i = 0, j = 0; i < width; i++, j += 3)
+ {
+ k = sline[j];
+ sline[j] = sline[j+2];
+ sline[j+2] = k;
+ }
+
+ return;
+ }
+
+ Error("BMPLineNone failed.");
+}
+
+
+static void BMPLineRLE8(FILE *f, char *sline, int pixbytes, int width)
+{
+ Error("RLE8 not yet supported.");
+}
+
+
+static void BMPLineRLE4(FILE *f, char *sline, int pixbytes, int width)
+{
+ Error("RLE4 not yet supported.");
+}
+
+
+static void BMPLine(FILE *f, char *scanline, int pixbytes, int width, int rle)
+{
+ switch (rle)
+ {
+ case xBI_NONE : BMPLineNone(f, scanline, pixbytes, width); return;
+ case xBI_RLE8 : BMPLineRLE8(f, scanline, pixbytes, width); return;
+ case xBI_RLE4 : BMPLineRLE4(f, scanline, pixbytes, width); return;
+ }
+
+ Error("Unknown compression type.");
+}
+
+
+
+static void PrintHeader(binfo_t *b)
+{
+ printf("biSize : %ld\n", b->biSize);
+ printf("biWidth : %ld\n", b->biWidth);
+ printf("biHeight : %ld\n", b->biHeight);
+ printf("biPlanes : %d\n", b->biPlanes);
+ printf("biBitCount : %d\n", b->biBitCount);
+ printf("biCompression : %ld\n", b->biCompression);
+ printf("biSizeImage : %ld\n", b->biSizeImage);
+ printf("biXPelsPerMeter: %ld\n", b->biXPelsPerMeter);
+ printf("biYPelsPerMeter: %ld\n", b->biYPelsPerMeter);
+ printf("biClrUsed : %ld\n", b->biClrUsed);
+ printf("biClrImportant : %ld\n", b->biClrImportant);
+}
+
+
+void LoadBMP(char *filename, bitmap_t *bit)
+{
+ FILE *f;
+ bmphd_t bhd;
+ binfo_t info;
+ int pxlsize = 1;
+ int rowbytes, i, pixbytes;
+ char *scanline;
+
+ // open file
+ if ((f = fopen(filename, "rb")) == NULL)
+ {
+ Error("Unable to open %s.", filename);
+ }
+
+ // read in bitmap header
+ if (fread(&bhd, sizeof(bhd), 1, f) != 1)
+ {
+ fclose(f);
+ Error("Unable to read in bitmap header.");
+ }
+
+ // make sure we have a valid bitmap file
+ if (bhd.bfType != BMP_SIGNATURE_WORD)
+ {
+ fclose(f);
+ Error("Invalid BMP file: %s", filename);
+ }
+
+ // load in info header
+ if (fread(&info, sizeof(info), 1, f) != 1)
+ {
+ fclose(f);
+ Error("Unable to read bitmap info header.");
+ }
+
+ // make sure this is an info type of bitmap
+ if (info.biSize != sizeof(binfo_t))
+ {
+ fclose(f);
+ Error("We only support the info bitmap type.");
+ }
+
+ // PrintHeader(&info);
+
+ bit->bpp = info.biBitCount;
+ bit->width = info.biWidth;
+ bit->height = info.biHeight;
+ bit->data = NULL;
+ bit->palette = NULL;
+
+ //currently we only read in 8 and 24 bit bmp files
+ if (info.biBitCount == 8) pixbytes = 1;
+ else if (info.biBitCount == 24) pixbytes = 3;
+ else
+ {
+ Error("BPP %d not supported.", info.biBitCount);
+ }
+
+ // if this is an eight bit image load palette
+ if (pixbytes == 1)
+ {
+ drgb_t q;
+
+ bit->palette = reinterpret_cast<rgb_t*>(malloc(sizeof(rgb_t) * 256));
+
+ for (i = 0; i < 256; i++)
+ {
+ if (fread(&q, sizeof(drgb_t), 1, f) != 1)
+ {
+ fclose(f); free(bit->palette);
+ Error("Unable to read palette.");
+ }
+
+ bit->palette[i].r = q.red;
+ bit->palette[i].g = q.green;
+ bit->palette[i].b = q.blue;
+ }
+ }
+
+ // position to start of bitmap
+ fseek(f, bhd.bfOffBits, SEEK_SET);
+
+ // create scanline to read data into
+ rowbytes = ((info.biWidth * pixbytes) + 3) / 4;
+ rowbytes *= 4;
+
+ scanline = reinterpret_cast<char*>(malloc(rowbytes));
+
+ // alloc space for new bitmap
+ bit->data = reinterpret_cast<unsigned char*>(malloc(info.biWidth * pixbytes * info.biHeight));
+
+ // read in image
+ for (i = 0; i < info.biHeight; i++)
+ {
+ BMPLine(f, scanline, pixbytes, info.biWidth, info.biCompression);
+
+ // store line
+ memcpy(&bit->data[info.biWidth * pixbytes * (info.biHeight - i - 1)], scanline, info.biWidth * pixbytes);
+ }
+
+ free(scanline);
+ fclose(f);
+}
+
+
+
+static void BMPEncodeLine(FILE *f, unsigned char *data, int npxls, int pixbytes)
+{
+ int nbytes, i, j, k;
+
+ switch (pixbytes)
+ {
+ case 1 :
+ nbytes = (npxls + 3) / 4;
+ nbytes *= 4;
+
+ fwrite(data, npxls, 1, f);
+ nbytes -= npxls;
+
+ while (nbytes-- > 0) fputc(0, f);
+ return;
+
+ case 3 :
+ // reorder rgb to bgr
+ for (i = 0, j = 0; i < npxls; i++, j+= 3)
+ {
+ k = data[j];
+ data[j] = data[j + 2];
+ data[j + 2] = k;
+ }
+
+ nbytes = ((npxls * 3) + 3) / 4;
+ nbytes *= 4;
+
+ fwrite(data, npxls, 3, f);
+ nbytes -= npxls * 3;
+
+ while (nbytes-- > 0) fputc(0, f);
+ return;
+ }
+
+ Error("BMPEncodeLine Failed.");
+}
+
+
+
+void WriteBMP(char *filename, bitmap_t *bit)
+{
+ FILE *f;
+ bmphd_t header;
+ binfo_t info;
+ drgb_t q; // palette that gets written
+ long bmofs;
+ int w, h, i;
+ int pixbytes;
+
+ if (bit->bpp == 8) pixbytes = 1;
+ else if (bit->bpp == 24) pixbytes = 3;
+
+ else
+ {
+ Error("BPP %d not supported.", bit->bpp);
+ }
+
+
+ if ((f = fopen(filename, "wb")) == NULL)
+ {
+ Error("Unable to open %s.", filename);
+ }
+
+ // write out an empty header as a place holder
+ if (fwrite(&header, sizeof(header), 1, f) != 1)
+ {
+ Error("Unable to fwrite.");
+ }
+
+ // init and write info header
+ info.biSize = sizeof(binfo_t);
+ info.biWidth = bit->width;
+ info.biHeight = bit->height;
+ info.biPlanes = 1;
+ info.biBitCount = bit->bpp;
+ info.biCompression = xBI_NONE;
+ info.biSizeImage = bit->width * bit->height;
+ info.biXPelsPerMeter = 0;
+ info.biYPelsPerMeter = 0;
+ info.biClrUsed = 256;
+ info.biClrImportant = 256;
+
+ if (fwrite(&info, sizeof(binfo_t), 1, f) != 1)
+ {
+ Error("fwrite failed.");
+ }
+
+ // write out palette if we need to
+ if (bit->bpp == 8)
+ {
+ for (i = 0; i < 256; i++)
+ {
+ q.red = bit->palette[i].r;
+ q.green = bit->palette[i].g;
+ q.blue = bit->palette[i].b;
+
+ fwrite(&q, sizeof(q), 1, f);
+ }
+ }
+
+ // save offset to start of bitmap
+ bmofs = ftell(f);
+
+ // output bitmap
+ w = bit->width;
+ h = bit->height;
+
+ for (i = h - 1; i >= 0; i--)
+ {
+ BMPEncodeLine(f, &bit->data[w * pixbytes * i], w, pixbytes);
+ }
+
+ // update and rewrite file header
+ header.bfType = BMP_SIGNATURE_WORD;
+ header.bfSize = ftell(f);
+ header.bfOffBits = bmofs;
+
+ fseek(f, 0L, SEEK_SET);
+ fwrite(&header, sizeof(header), 1, f);
+
+ fclose(f);
+}
+
+
+void NewBMP(int width, int height, int bpp, bitmap_t *bit)
+{
+ int pixbytes;
+
+ if (bpp == 8) pixbytes = 1;
+ else if (bpp == 24) pixbytes = 3;
+
+ else
+ {
+ Error("NewBMP: 8 or 24 bit only.");
+ }
+
+ bit->bpp = bpp;
+ bit->width = width;
+ bit->height = height;
+
+ bit->data = reinterpret_cast<unsigned char*>(malloc(width * height * pixbytes));
+
+ if (bit->data == NULL)
+ {
+ Error("NewBMP: malloc failed.");
+ }
+
+ // see if we need to create a palette
+ if (pixbytes == 1)
+ {
+ bit->palette = (rgb_t *) malloc(768);
+
+ if (bit->palette == NULL)
+ {
+ Error("NewBMP: unable to malloc palette.");
+ }
+ }
+ else
+ {
+ bit->palette = NULL;
+ }
+}
+
+
+
+void FreeBMP(bitmap_t *bitmap)
+{
+ if (bitmap->palette)
+ {
+ free(bitmap->palette);
+ bitmap->palette = NULL;
+ }
+
+ if (bitmap->data)
+ {
+ free(bitmap->data);
+ bitmap->data = NULL;
+ }
+}
+
+
|