diff options
Diffstat (limited to 'progs/windml/readtex.c')
| -rw-r--r-- | progs/windml/readtex.c | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/progs/windml/readtex.c b/progs/windml/readtex.c deleted file mode 100644 index 659c49de8de..00000000000 --- a/progs/windml/readtex.c +++ /dev/null @@ -1,365 +0,0 @@ -/* readtex.c */ - -/* - * Read an SGI .rgb image file and generate a mipmap texture set. - * Much of this code was borrowed from SGI's tk OpenGL toolkit. - */ - -#include <GL/gl.h> -#include <GL/glu.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "../util/readtex.h" - - -#ifndef SEEK_SET -# define SEEK_SET 0 -#endif - - -/* -** RGB Image Structure -*/ - -typedef struct _TK_RGBImageRec { - GLint sizeX, sizeY; - GLint components; - unsigned char *data; -} TK_RGBImageRec; - - - -/******************************************************************************/ - -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, *tmpA; - 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++ = (unsigned short) ((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(const 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"); - return NULL; - } - if ((raw->file = fopen(fileName, "rb")) == NULL) { - perror(fileName); - return NULL; - } - - 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->sizeZ==4) { - raw->tmpA = (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"); - return NULL; - } - - 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"); - return NULL; - } - 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, (long) (x/sizeof(GLuint))); - ConvertLong((GLuint *)raw->rowSize, (long) (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); - if (raw->sizeZ>3) { - free(raw->tmpA); - } - free(raw); -} - -static void RawImageGetRow(rawImageRec *raw, unsigned char *buf, int y, int z) -{ - unsigned char *iPtr, *oPtr, pixel; - int count, done = 0; - - if ((raw->type & 0xFF00) == 0x0100) { - fseek(raw->file, (long) 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 (!done) { - pixel = *iPtr++; - count = (int)(pixel & 0x7F); - if (!count) { - done = 1; - 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"); - } - - ptr = final->data; - for (i = 0; i < (int)(raw->sizeY); i++) { - RawImageGetRow(raw, raw->tmpR, i, 0); - RawImageGetRow(raw, raw->tmpG, i, 1); - RawImageGetRow(raw, raw->tmpB, i, 2); - if (raw->sizeZ>3) { - RawImageGetRow(raw, raw->tmpA, i, 3); - } - for (j = 0; j < (int)(raw->sizeX); j++) { - *ptr++ = *(raw->tmpR + j); - *ptr++ = *(raw->tmpG + j); - *ptr++ = *(raw->tmpB + j); - if (raw->sizeZ>3) { - *ptr++ = *(raw->tmpA + j); - } - } - } -} - - -static TK_RGBImageRec *tkRGBImageLoad(const char *fileName) -{ - rawImageRec *raw; - TK_RGBImageRec *final; - - raw = RawImageOpen(fileName); - if (!raw) { - fprintf(stderr, "File not found\n"); - return NULL; - } - final = (TK_RGBImageRec *)malloc(sizeof(TK_RGBImageRec)); - if (final == NULL) { - fprintf(stderr, "Out of memory!\n"); - return NULL; - } - final->sizeX = raw->sizeX; - final->sizeY = raw->sizeY; - final->components = raw->sizeZ; - RawImageGetData(raw, final); - RawImageClose(raw); - return final; -} - - -static void FreeImage( TK_RGBImageRec *image ) -{ - free(image->data); - free(image); -} - - -/* - * Load an SGI .rgb file and generate a set of 2-D mipmaps from it. - * Input: imageFile - name of .rgb to read - * intFormat - internal texture format to use, or number of components - * Return: GL_TRUE if success, GL_FALSE if error. - */ -GLboolean LoadRGBMipmaps( const char *imageFile, GLint intFormat ) -{ - GLint w, h; - return LoadRGBMipmaps2( imageFile, GL_TEXTURE_2D, intFormat, &w, &h ); -} - - - -GLboolean LoadRGBMipmaps2( const char *imageFile, GLenum target, - GLint intFormat, GLint *width, GLint *height ) -{ - GLint error; - GLenum format; - TK_RGBImageRec *image; - - image = tkRGBImageLoad( imageFile ); - if (!image) { - return GL_FALSE; - } - - if (image->components==3) { - format = GL_RGB; - } - else if (image->components==4) { - format = GL_RGBA; - } - else { - /* not implemented */ - fprintf(stderr, - "Error in LoadRGBMipmaps %d-component images not implemented\n", - image->components ); - return GL_FALSE; - } - - error = gluBuild2DMipmaps( target, - intFormat, - image->sizeX, image->sizeY, - format, - GL_UNSIGNED_BYTE, - image->data ); - - *width = image->sizeX; - *height = image->sizeY; - - FreeImage(image); - - return error ? GL_FALSE : GL_TRUE; -} - - - -/* - * Load an SGI .rgb file and return a pointer to the image data. - * Input: imageFile - name of .rgb to read - * Output: width - width of image - * height - height of image - * format - format of image (GL_RGB or GL_RGBA) - * Return: pointer to image data or NULL if error - */ -GLubyte *LoadRGBImage( const char *imageFile, GLint *width, GLint *height, - GLenum *format ) -{ - TK_RGBImageRec *image; - GLint bytes; - GLubyte *buffer; - - image = tkRGBImageLoad( imageFile ); - if (!image) { - return NULL; - } - - if (image->components==3) { - *format = GL_RGB; - } - else if (image->components==4) { - *format = GL_RGBA; - } - else { - /* not implemented */ - fprintf(stderr, - "Error in LoadRGBImage %d-component images not implemented\n", - image->components ); - return NULL; - } - - *width = image->sizeX; - *height = image->sizeY; - - bytes = image->sizeX * image->sizeY * image->components; - buffer = (GLubyte *) malloc(bytes); - if (!buffer) - return NULL; - - memcpy( (void *) buffer, (void *) image->data, bytes ); - - FreeImage(image); - - return buffer; -} - |