bmploader.cpp
资源名称:CUDAseg.zip [点击查看]
上传用户:liuping58
上传日期:2022-06-05
资源大小:105k
文件大小:4k
源码类别:
3D图形编程
开发平台:
Visual C++
- /*
- * Copyright 1993-2007 NVIDIA Corporation. All rights reserved.
- *
- * NOTICE TO USER:
- *
- * This source code is subject to NVIDIA ownership rights under U.S. and
- * international Copyright laws. Users and possessors of this source code
- * are hereby granted a nonexclusive, royalty-free license to use this code
- * in individual and commercial software.
- *
- * NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THIS SOURCE
- * CODE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR
- * IMPLIED WARRANTY OF ANY KIND. NVIDIA DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOURCE CODE, INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE.
- * IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL,
- * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
- * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE
- * OR PERFORMANCE OF THIS SOURCE CODE.
- *
- * U.S. Government End Users. This source code is a "commercial item" as
- * that term is defined at 48 C.F.R. 2.101 (OCT 1995), consisting of
- * "commercial computer software" and "commercial computer software
- * documentation" as such terms are used in 48 C.F.R. 12.212 (SEPT 1995)
- * and is provided to the U.S. Government only as a commercial end item.
- * Consistent with 48 C.F.R.12.212 and 48 C.F.R. 227.7202-1 through
- * 227.7202-4 (JUNE 1995), all U.S. Government End Users acquire the
- * source code with only those rights set forth herein.
- *
- * Any use of this source code in individual and commercial software must
- * include, in the user documentation and internal comments to the code,
- * the above Disclaimer and U.S. Government End Users Notice.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #ifdef _WIN32
- # pragma warning( disable : 4996 ) // disable deprecated warning
- #endif
- #pragma pack(1)
- typedef struct{
- short type;
- int size;
- short reserved1;
- short reserved2;
- int offset;
- } BMPHeader;
- typedef struct{
- int size;
- int width;
- int height;
- short planes;
- short bitsPerPixel;
- unsigned compression;
- unsigned imageSize;
- int xPelsPerMeter;
- int yPelsPerMeter;
- int clrUsed;
- int clrImportant;
- } BMPInfoHeader;
- //Isolated definition
- typedef struct{
- unsigned char x, y, z, w;
- } uchar4;
- void LoadBMPFile(uchar4 **dst, int *width, int *height, const char *name){
- BMPHeader hdr;
- BMPInfoHeader infoHdr;
- int x, y;
- FILE *fd;
- printf("Loading %s...n", name);
- if(sizeof(uchar4) != 4){
- printf("***Bad uchar4 size***n");
- exit(0);
- }
- if( !(fd = fopen(name,"rb")) ){
- printf("***BMP load error: file access denied***n");
- exit(0);
- }
- fread(&hdr, sizeof(hdr), 1, fd);
- if(hdr.type != 0x4D42){
- printf("***BMP load error: bad file format***n");
- exit(0);
- }
- fread(&infoHdr, sizeof(infoHdr), 1, fd);
- if(infoHdr.bitsPerPixel != 24){
- printf("***BMP load error: invalid color depth***n");
- exit(0);
- }
- if(infoHdr.compression){
- printf("***BMP load error: compressed image***n");
- exit(0);
- }
- *width = infoHdr.width;
- *height = infoHdr.height;
- *dst = (uchar4 *)malloc(*width * *height * 4);
- printf("BMP width: %un", infoHdr.width);
- printf("BMP height: %un", infoHdr.height);
- fseek(fd, hdr.offset - sizeof(hdr) - sizeof(infoHdr), SEEK_CUR);
- for(y = 0; y < infoHdr.height; y++){
- for(x = 0; x < infoHdr.width; x++){
- (*dst)[(y * infoHdr.width + x)].z = fgetc(fd);
- (*dst)[(y * infoHdr.width + x)].y = fgetc(fd);
- (*dst)[(y * infoHdr.width + x)].x = fgetc(fd);
- }
- for(x = 0; x < (4 - (3 * infoHdr.width) % 4) % 4; x++)
- fgetc(fd);
- }
- if(ferror(fd)){
- printf("***Unknown BMP load error.***n");
- free(*dst);
- exit(0);
- }else
- printf("BMP file loaded successfully!n");
- fclose(fd);
- }