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- /*
- * (c) Copyright 1993, 1994, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED
- * Permission to use, copy, modify, and distribute this software for
- * any purpose and without fee is hereby granted, provided that the above
- * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that
- * the name of Silicon Graphics, Inc. not be used in advertising
- * or publicity pertaining to distribution of the software without specific,
- * written prior permission.
- *
- * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
- * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
- * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
- * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
- * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
- * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
- * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
- * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
- * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
- * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * US Government Users Restricted Rights
- * Use, duplication, or disclosure by the Government is subject to
- * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
- * (c)(1)(ii) of the Rights in Technical Data and Computer Software
- * clause at DFARS 252.227-7013 and/or in similar or successor
- * clauses in the FAR or the DOD or NASA FAR Supplement.
- * Unpublished-- rights reserved under the copyright laws of the
- * United States. Contractor/manufacturer is Silicon Graphics,
- * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
- *
- * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "tk.h"
- #include "private.h"
-
- /******************************************************************************/
-
- typedef struct _rawImageRec {
- unsigned short imagic;
- unsigned short type;
- unsigned short dim;
- unsigned short sizeX, sizeY, sizeZ;
- unsigned long min, max;
- unsigned long wasteBytes;
- char name[80];
- unsigned long colorMap;
- FILE *file;
- unsigned char *tmp, *tmpR, *tmpG, *tmpB;
- unsigned long rleEnd;
- GLuint *rowStart;
- GLint *rowSize;
- } rawImageRec;
-
- /******************************************************************************/
-
- static void ConvertShort(unsigned short *array, long length)
- {
- unsigned long b1, b2;
- unsigned char *ptr;
-
- ptr = (unsigned char *)array;
- while (length--) {
- b1 = *ptr++;
- b2 = *ptr++;
- *array++ = (b1 << 8) | (b2);
- }
- }
-
- static void ConvertLong(GLuint *array, long length)
- {
- unsigned long b1, b2, b3, b4;
- unsigned char *ptr;
-
- ptr = (unsigned char *)array;
- while (length--) {
- b1 = *ptr++;
- b2 = *ptr++;
- b3 = *ptr++;
- b4 = *ptr++;
- *array++ = (b1 << 24) | (b2 << 16) | (b3 << 8) | (b4);
- }
- }
-
- static rawImageRec *RawImageOpen(char *fileName)
- {
- union {
- int testWord;
- char testByte[4];
- } endianTest;
- rawImageRec *raw;
- GLenum swapFlag;
- int x;
-
- endianTest.testWord = 1;
- if (endianTest.testByte[0] == 1) {
- swapFlag = GL_TRUE;
- } else {
- swapFlag = GL_FALSE;
- }
-
- raw = (rawImageRec *)malloc(sizeof(rawImageRec));
- if (raw == NULL) {
- fprintf(stderr, "Out of memory!\n");
- tkQuit();
- }
- if ((raw->file = fopen(fileName, "rb")) == NULL) {
- perror(fileName);
- tkQuit();
- }
-
- fread(raw, 1, 12, raw->file);
-
- if (swapFlag) {
- ConvertShort(&raw->imagic, 6);
- }
-
- raw->tmp = (unsigned char *)malloc(raw->sizeX*256);
- raw->tmpR = (unsigned char *)malloc(raw->sizeX*256);
- raw->tmpG = (unsigned char *)malloc(raw->sizeX*256);
- raw->tmpB = (unsigned char *)malloc(raw->sizeX*256);
- if (raw->tmp == NULL || raw->tmpR == NULL || raw->tmpG == NULL ||
- raw->tmpB == NULL) {
- fprintf(stderr, "Out of memory!\n");
- tkQuit();
- }
-
- if ((raw->type & 0xFF00) == 0x0100) {
- x = raw->sizeY * raw->sizeZ * sizeof(GLuint);
- raw->rowStart = (GLuint *)malloc(x);
- raw->rowSize = (GLint *)malloc(x);
- if (raw->rowStart == NULL || raw->rowSize == NULL) {
- fprintf(stderr, "Out of memory!\n");
- tkQuit();
- }
- raw->rleEnd = 512 + (2 * x);
- fseek(raw->file, 512, SEEK_SET);
- fread(raw->rowStart, 1, x, raw->file);
- fread(raw->rowSize, 1, x, raw->file);
- if (swapFlag) {
- ConvertLong(raw->rowStart, x/sizeof(GLuint));
- ConvertLong((GLuint *)raw->rowSize, x/sizeof(GLint));
- }
- }
- return raw;
- }
-
- static void RawImageClose(rawImageRec *raw)
- {
-
- fclose(raw->file);
- free(raw->tmp);
- free(raw->tmpR);
- free(raw->tmpG);
- free(raw->tmpB);
- free(raw);
- }
-
- static void RawImageGetRow(rawImageRec *raw, unsigned char *buf, int y, int z)
- {
- unsigned char *iPtr, *oPtr, pixel;
- int count;
-
- if ((raw->type & 0xFF00) == 0x0100) {
- fseek(raw->file, raw->rowStart[y+z*raw->sizeY], SEEK_SET);
- fread(raw->tmp, 1, (unsigned int)raw->rowSize[y+z*raw->sizeY],
- raw->file);
-
- iPtr = raw->tmp;
- oPtr = buf;
- while (1) {
- pixel = *iPtr++;
- count = (int)(pixel & 0x7F);
- if (!count) {
- return;
- }
- if (pixel & 0x80) {
- while (count--) {
- *oPtr++ = *iPtr++;
- }
- } else {
- pixel = *iPtr++;
- while (count--) {
- *oPtr++ = pixel;
- }
- }
- }
- } else {
- fseek(raw->file, 512+(y*raw->sizeX)+(z*raw->sizeX*raw->sizeY),
- SEEK_SET);
- fread(buf, 1, raw->sizeX, raw->file);
- }
- }
-
- static void RawImageGetData(rawImageRec *raw, TK_RGBImageRec *final)
- {
- unsigned char *ptr;
- int i, j;
-
- final->data = (unsigned char *)malloc((raw->sizeX+1)*(raw->sizeY+1)*4);
- if (final->data == NULL) {
- fprintf(stderr, "Out of memory!\n");
- tkQuit();
- }
-
- ptr = final->data;
- for (i = 0; i < raw->sizeY; i++) {
- RawImageGetRow(raw, raw->tmpR, i, 0);
- RawImageGetRow(raw, raw->tmpG, i, 1);
- RawImageGetRow(raw, raw->tmpB, i, 2);
- for (j = 0; j < raw->sizeX; j++) {
- *ptr++ = *(raw->tmpR + j);
- *ptr++ = *(raw->tmpG + j);
- *ptr++ = *(raw->tmpB + j);
- }
- }
- }
-
- TK_RGBImageRec *tkRGBImageLoad(char *fileName)
- {
- rawImageRec *raw;
- TK_RGBImageRec *final;
-
- raw = RawImageOpen(fileName);
- final = (TK_RGBImageRec *)malloc(sizeof(TK_RGBImageRec));
- if (final == NULL) {
- fprintf(stderr, "Out of memory!\n");
- tkQuit();
- }
- final->sizeX = raw->sizeX;
- final->sizeY = raw->sizeY;
- RawImageGetData(raw, final);
- RawImageClose(raw);
- return final;
- }
-
- /******************************************************************************/
-