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author | marha <marha@users.sourceforge.net> | 2010-11-29 22:05:53 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2010-11-29 22:05:53 +0000 |
commit | fed109d6a33c0871291d1bb2f3f6b7a3d1a3e9d7 (patch) | |
tree | fa1ba494685a71e28a096990a8707680c7cb378b /mesalib/progs/util/readtex.c | |
parent | ae340911c1ba1f98b418bd8f1a487fa4d79491b0 (diff) | |
parent | 6fda93be42ace9eeab0e82ceebb6798961c9105c (diff) | |
download | vcxsrv-fed109d6a33c0871291d1bb2f3f6b7a3d1a3e9d7.tar.gz vcxsrv-fed109d6a33c0871291d1bb2f3f6b7a3d1a3e9d7.tar.bz2 vcxsrv-fed109d6a33c0871291d1bb2f3f6b7a3d1a3e9d7.zip |
svn merge ^/branches/released .
Diffstat (limited to 'mesalib/progs/util/readtex.c')
-rw-r--r-- | mesalib/progs/util/readtex.c | 495 |
1 files changed, 0 insertions, 495 deletions
diff --git a/mesalib/progs/util/readtex.c b/mesalib/progs/util/readtex.c deleted file mode 100644 index f6f511481..000000000 --- a/mesalib/progs/util/readtex.c +++ /dev/null @@ -1,495 +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 <assert.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "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; - size_t result; - - endianTest.testWord = 1; - if (endianTest.testByte[0] == 1) { - swapFlag = GL_TRUE; - } else { - swapFlag = GL_FALSE; - } - - raw = (rawImageRec *)calloc(1, sizeof(rawImageRec)); - if (raw == NULL) { - fprintf(stderr, "Out of memory!\n"); - return NULL; - } - raw->file = fopen(fileName, "rb"); - if (raw->file == NULL) { - const char *baseName = strrchr(fileName, '/'); - if(baseName) - raw->file = fopen(baseName + 1, "rb"); - if(raw->file == NULL) { - perror(fileName); - free(raw); - return NULL; - } - } - - result = fread(raw, 1, 12, raw->file); - assert(result == 12); - - if (swapFlag) { - ConvertShort(&raw->imagic, 1); - ConvertShort(&raw->type, 1); - ConvertShort(&raw->dim, 1); - ConvertShort(&raw->sizeX, 1); - ConvertShort(&raw->sizeY, 1); - ConvertShort(&raw->sizeZ, 1); - } - - 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"); - free(raw->tmp); - free(raw->tmpR); - free(raw->tmpG); - free(raw->tmpB); - free(raw->tmpA); - free(raw); - 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"); - free(raw->tmp); - free(raw->tmpR); - free(raw->tmpG); - free(raw->tmpB); - free(raw->tmpA); - free(raw->rowStart); - free(raw->rowSize); - free(raw); - return NULL; - } - raw->rleEnd = 512 + (2 * x); - fseek(raw->file, 512, SEEK_SET); - result = fread(raw->rowStart, 1, x, raw->file); - assert(result == x); - result = fread(raw->rowSize, 1, x, raw->file); - assert(result == x); - 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->rowStart) - free(raw->rowStart); - if (raw->rowSize) - free(raw->rowSize); - 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; - size_t result; - - if ((raw->type & 0xFF00) == 0x0100) { - fseek(raw->file, (long) raw->rowStart[y+z*raw->sizeY], SEEK_SET); - result = fread(raw->tmp, 1, (unsigned int)raw->rowSize[y+z*raw->sizeY], - raw->file); - assert(result == (unsigned int)raw->rowSize[y+z*raw->sizeY]); - - 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); - result = fread(buf, 1, raw->sizeX, raw->file); - assert(result == raw->sizeX); - } -} - - -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"); - return; - } - - 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"); - RawImageClose(raw); - 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 ); - FreeImage(image); - 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 ); - FreeImage(image); - return NULL; - } - - *width = image->sizeX; - *height = image->sizeY; - - bytes = image->sizeX * image->sizeY * image->components; - buffer = (GLubyte *) malloc(bytes); - if (!buffer) { - FreeImage(image); - return NULL; - } - - memcpy( (void *) buffer, (void *) image->data, bytes ); - - FreeImage(image); - - return buffer; -} - -#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) ) - - -static void ConvertRGBtoYUV(GLint w, GLint h, GLint texel_bytes, - const GLubyte *src, - GLushort *dest) -{ - GLint i, j; - - for (i = 0; i < h; i++) { - for (j = 0; j < w; j++) { - const GLfloat r = (src[0]) / 255.0; - const GLfloat g = (src[1]) / 255.0; - const GLfloat b = (src[2]) / 255.0; - GLfloat y, cr, cb; - GLint iy, icr, icb; - - y = r * 65.481 + g * 128.553 + b * 24.966 + 16; - cb = r * -37.797 + g * -74.203 + b * 112.0 + 128; - cr = r * 112.0 + g * -93.786 + b * -18.214 + 128; - /*printf("%f %f %f -> %f %f %f\n", r, g, b, y, cb, cr);*/ - iy = (GLint) CLAMP(y, 0, 254); - icb = (GLint) CLAMP(cb, 0, 254); - icr = (GLint) CLAMP(cr, 0, 254); - - if (j & 1) { - /* odd */ - *dest = (iy << 8) | icr; - } - else { - /* even */ - *dest = (iy << 8) | icb; - } - dest++; - src += texel_bytes; - } - } -} - - -/* - * Load an SGI .rgb file and return a pointer to the image data, converted - * to 422 yuv. - * - * Input: imageFile - name of .rgb to read - * Output: width - width of image - * height - height of image - * Return: pointer to image data or NULL if error - */ -GLushort *LoadYUVImage( const char *imageFile, GLint *width, GLint *height ) -{ - TK_RGBImageRec *image; - GLushort *buffer; - - image = tkRGBImageLoad( imageFile ); - if (!image) { - return NULL; - } - - if (image->components != 3 && image->components !=4 ) { - /* not implemented */ - fprintf(stderr, - "Error in LoadYUVImage %d-component images not implemented\n", - image->components ); - FreeImage(image); - return NULL; - } - - *width = image->sizeX; - *height = image->sizeY; - - buffer = (GLushort *) malloc( image->sizeX * image->sizeY * 2 ); - - if (buffer) - ConvertRGBtoYUV( image->sizeX, - image->sizeY, - image->components, - image->data, - buffer ); - - - FreeImage(image); - return buffer; -} - |