mirror of https://github.com/BOINC/boinc.git
390 lines
9.6 KiB
C
390 lines
9.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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void bwtorgba(unsigned char *b,unsigned char *l,int n) {
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while(n--) {
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l[0] = *b;
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l[1] = *b;
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l[2] = *b;
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l[3] = 0xff;
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l += 4;
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b++;
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}
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}
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void latorgba(unsigned char *b, unsigned char *a,unsigned char *l,int n) {
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while(n--) {
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l[0] = *b;
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l[1] = *b;
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l[2] = *b;
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l[3] = *a;
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l += 4;
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b++;
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a++;
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}
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}
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void rgbtorgba(unsigned char *r,unsigned char *g,unsigned char *b,unsigned char *l,int n) {
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while(n--) {
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l[0] = r[0];
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l[1] = g[0];
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l[2] = b[0];
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l[3] = 0xff;
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l += 4;
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r++;
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g++;
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b++;
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}
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}
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void rgbatorgba(unsigned char *r,unsigned char *g,unsigned char *b,unsigned char *a,unsigned char *l,int n) {
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while(n--) {
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l[0] = r[0];
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l[1] = g[0];
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l[2] = b[0];
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l[3] = a[0];
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l += 4;
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r++;
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g++;
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b++;
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a++;
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}
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}
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typedef struct _ImageRec {
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unsigned short imagic;
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unsigned short type;
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unsigned short dim;
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unsigned short xsize, ysize, zsize;
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unsigned int min, max;
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unsigned int wasteBytes;
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char name[80];
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unsigned long colorMap;
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FILE *file;
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unsigned char *tmp, *tmpR, *tmpG, *tmpB;
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unsigned long rleEnd;
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unsigned int *rowStart;
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int *rowSize;
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} ImageRec;
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static void ConvertShort(unsigned short *array, long length) {
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unsigned b1, b2;
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unsigned char *ptr;
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ptr = (unsigned char *) array;
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while (length--) {
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b1 = *ptr++;
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b2 = *ptr++;
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*array++ = (b1 << 8) | (b2);
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}
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}
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static void ConvertLong(unsigned *array, long length) {
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unsigned long b1, b2, b3, b4;
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unsigned char *ptr;
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ptr = (unsigned char *)array;
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while (length--) {
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b1 = *ptr++;
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b2 = *ptr++;
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b3 = *ptr++;
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b4 = *ptr++;
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*array++ = (b1 << 24) | (b2 << 16) | (b3 << 8) | (b4);
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}
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}
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static ImageRec *ImageOpen(const char *fileName){
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union {
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int testWord;
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char testByte[4];
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}
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endianTest;
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ImageRec *image;
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int swapFlag;
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int x;
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endianTest.testWord = 1;
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if (endianTest.testByte[0] == 1) {
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swapFlag = 1;
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}
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else {
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swapFlag = 0;
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}
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image = (ImageRec *)malloc(sizeof(ImageRec));
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if (image == NULL) {
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goto error;
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}
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if ((image->file = fopen(fileName, "rb")) == NULL) {
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perror(fileName);
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free(image);
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return NULL;
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}
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fread(image, 1, 12, image->file);
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if (swapFlag) {
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ConvertShort(&image->imagic, 6);
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}
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image->tmp = (unsigned char *)malloc(image->xsize*256);
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image->tmpR = (unsigned char *)malloc(image->xsize*256);
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image->tmpG = (unsigned char *)malloc(image->xsize*256);
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image->tmpB = (unsigned char *)malloc(image->xsize*256);
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if (image->tmp == NULL || image->tmpR == NULL || image->tmpG == NULL ||image->tmpB == NULL) {
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goto error;
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}
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if ((image->type & 0xFF00) == 0x0100) {
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x = image->ysize * image->zsize * sizeof(unsigned);
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image->rowStart = (unsigned *)malloc(x);
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image->rowSize = (int *)malloc(x);
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if (image->rowStart == NULL || image->rowSize == NULL) {
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goto error;
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}
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image->rleEnd = 512 + (2 * x);
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fseek(image->file, 512, SEEK_SET);
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fread(image->rowStart, 1, x, image->file);
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fread(image->rowSize, 1, x, image->file);
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if (swapFlag) {
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ConvertLong(image->rowStart, x/sizeof(unsigned));
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ConvertLong((unsigned *)image->rowSize, x/sizeof(int));
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}
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}
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return image;
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error:
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if (image) {
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if (image->rowSize) free(image->rowSize);
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if (image->rowStart) free(image->rowStart);
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if (image->tmpB) free(image->tmpB);
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if (image->tmpG) free(image->tmpG);
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if (image->tmpR)free(image->tmpR);
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if (image->tmp) free(image->tmp);
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if (image->file) fclose(image->file);
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free(image);
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}
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fprintf(stderr, "Out of memory!\n");
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return NULL;
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}
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static void ImageClose(ImageRec *image) {
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fclose(image->file);
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free(image->tmp);
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free(image->tmpR);
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free(image->tmpG);
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free(image->tmpB);
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free(image);
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}
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static void ImageGetRow(ImageRec *image, unsigned char *buf, int y, int z) {
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unsigned char *iPtr, *oPtr, pixel;
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int count;
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if ((image->type & 0xFF00) == 0x0100) {
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fseek(image->file, image->rowStart[y+z*image->ysize], SEEK_SET);
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fread(image->tmp, 1, (unsigned int)image->rowSize[y+z*image->ysize],image->file);
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iPtr = image->tmp;
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oPtr = buf;
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while (1) {
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pixel = *iPtr++;
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count = (int)(pixel & 0x7F);
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if (!count) {
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return;
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}
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if (pixel & 0x80) {
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while (count--) {
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*oPtr++ = *iPtr++;
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}
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}
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else {
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pixel = *iPtr++;
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while (count--) {
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*oPtr++ = pixel;
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}
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}
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}
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}
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else {
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fseek(image->file, 512+(y*image->xsize)+(z*image->xsize*image->ysize),SEEK_SET);
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fread(buf, 1, image->xsize, image->file);
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}
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}
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//-------------------------TGA LOADER-------------------------
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// =============
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// checkSize
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// Make sure its a power of 2.
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// =============
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int checkSize (int x){
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return 1;
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if (x == 2 || x == 4 ||
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x == 8 || x == 16 ||
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x == 32 || x == 64 ||
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x == 128 || x == 256 || x == 512)
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return 1;
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else
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return 0;
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}
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unsigned int texFormat;
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unsigned char* getRGBA (FILE *s, int size){
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unsigned char *rgba;
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unsigned char temp;
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int bread;
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int i;
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rgba=(unsigned char*)malloc(size * 4);
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if (rgba == NULL) return 0;
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bread = fread (rgba, sizeof (unsigned char), size * 4, s);
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// TGA is stored in BGRA, make it RGBA
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if (bread != size * 4) {
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free (rgba);
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return 0;
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}
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for (i = 0; i < size * 4; i += 4 ){
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temp = rgba[i];
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rgba[i] = rgba[i + 2];
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rgba[i + 2] = temp;
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}
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return rgba;
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}
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// =============
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// getRGB
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// Reads in RGB data for a 24bit image.
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// =============
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unsigned char* getRGB (FILE *s, int size){
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unsigned char *rgb;
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unsigned char temp;
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int bread;
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int i;
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rgb=(unsigned char*)malloc(size * 3);
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if (rgb == NULL) return 0;
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bread = fread (rgb, sizeof (unsigned char), size * 3, s);
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if (bread != size * 3){
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free (rgb);
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return 0;
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}
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// TGA is stored in BGR, make it RGB
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for (i = 0; i < size * 3; i += 3){
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temp = rgb[i];
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rgb[i] = rgb[i + 2];
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rgb[i + 2] = temp;
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}
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return rgb;
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}
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// =============
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// getGray
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// Gets the grayscale image data. Used as an alpha channel.
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// =============
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unsigned char* getGray (FILE *s, int size){
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unsigned char *grayData;
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int bread;
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grayData=(unsigned char*)malloc (size);
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if (grayData == NULL) return 0;
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bread = fread (grayData, sizeof (unsigned char), size, s);
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if (bread != size){
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free (grayData);
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return 0;
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}
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return grayData;
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}
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// =============
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// getData
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// Gets the image data for the specified bit depth.
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// =============
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unsigned char* getData (FILE *s, int sz, int iBits){
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switch (iBits){
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case 32 : return getRGBA (s, sz); break;
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case 24 : return getRGB (s, sz); break;
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case 8 : return getGray (s, sz); break;
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default : return NULL;
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}
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}
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unsigned * read_tga_texture(char *name, int *width, int *height, int*) {
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unsigned char type[4];
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unsigned char info[7];
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unsigned *base;
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int imageBits, size;
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FILE *s;
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if (!(s = fopen (name, "r+bt"))) return NULL;
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fread (&type, sizeof (char), 3, s); // read in colormap info and image type, byte 0 ignored
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fseek (s, 12, SEEK_SET); // seek past the header and useless info
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fread (&info, sizeof (char), 6, s);
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if (type[1] != 0 || (type[2] != 2 && type[2] != 3)) return NULL;
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(*width) = info[0] + info[1] * 256;
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(*height) = info[2] + info[3] * 256;
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imageBits = info[4];
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size = (*width) * (*height);
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// make sure dimension is a power of 2
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if (!checkSize ((*width)) || !checkSize ((*height) )) return NULL;
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// make sure we are loading a supported type
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if (imageBits != 32 && imageBits != 24 && imageBits != 8) return NULL;
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base = (unsigned int *)getData (s, size, imageBits);
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return (unsigned *) base;
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fclose(s);
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}
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unsigned * read_rgb_texture(const char *name, int *width, int *height, int *components) {
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unsigned *base, *lptr;
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unsigned char *rbuf, *gbuf, *bbuf, *abuf;
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ImageRec *image;
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int y;
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image = ImageOpen(name);
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if(!image) return NULL;
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(*width)=image->xsize;
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(*height)=image->ysize;
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(*components)=image->zsize;
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base = (unsigned *)malloc(image->xsize*image->ysize*sizeof(unsigned));
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rbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
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gbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
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bbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
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abuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
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if(!base || !rbuf || !gbuf || !bbuf) goto error;
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lptr = base;
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for(y=0; y<image->ysize; y++) {
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if(image->zsize>=4) {
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ImageGetRow(image,rbuf,y,0);
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ImageGetRow(image,gbuf,y,1);
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ImageGetRow(image,bbuf,y,2);
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ImageGetRow(image,abuf,y,3);
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rgbatorgba(rbuf,gbuf,bbuf,abuf,(unsigned char *)lptr,image->xsize);
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lptr += image->xsize;
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} else if(image->zsize==3) {
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ImageGetRow(image,rbuf,y,0);
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ImageGetRow(image,gbuf,y,1);
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ImageGetRow(image,bbuf,y,2);
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rgbtorgba(rbuf,gbuf,bbuf,(unsigned char *)lptr,image->xsize);
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lptr += image->xsize;
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} else if(image->zsize==2) {
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ImageGetRow(image,rbuf,y,0);
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ImageGetRow(image,abuf,y,1);
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latorgba(rbuf,abuf,(unsigned char *)lptr,image->xsize);
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lptr += image->xsize;
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} else {
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ImageGetRow(image,rbuf,y,0);
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bwtorgba(rbuf,(unsigned char *)lptr,image->xsize);
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lptr += image->xsize;
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}
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}
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ImageClose(image);
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free(rbuf);
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free(gbuf);
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free(bbuf);
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free(abuf);
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return (unsigned *) base;
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error:
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ImageClose(image);
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if (abuf) free(abuf);
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if (bbuf) free(bbuf);
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if (bbuf) free(gbuf);
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if (bbuf) free(rbuf);
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if (base) free(base);
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return NULL;
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}
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const char *BOINC_RCSID_97d4f29d84="$Id$";
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