mirror of
https://github.com/NVIDIA/cuda-samples.git
synced 2024-11-24 20:59:17 +08:00
129 lines
3.7 KiB
C++
129 lines
3.7 KiB
C++
/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of NVIDIA CORPORATION nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
|
|
#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;
|
|
|
|
extern "C" 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(EXIT_SUCCESS);
|
|
}
|
|
|
|
if (!(fd = fopen(name, "rb"))) {
|
|
printf("***BMP load error: file access denied***\n");
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
fread(&hdr, sizeof(hdr), 1, fd);
|
|
|
|
if (hdr.type != 0x4D42) {
|
|
printf("***BMP load error: bad file format***\n");
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
fread(&infoHdr, sizeof(infoHdr), 1, fd);
|
|
|
|
if (infoHdr.bitsPerPixel != 24) {
|
|
printf("***BMP load error: invalid color depth***\n");
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
if (infoHdr.compression) {
|
|
printf("***BMP load error: compressed image***\n");
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
*width = infoHdr.width;
|
|
*height = infoHdr.height;
|
|
*dst = (uchar4 *)malloc(*width * *height * 4);
|
|
|
|
printf("BMP width: %u\n", infoHdr.width);
|
|
printf("BMP height: %u\n", 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(EXIT_SUCCESS);
|
|
} else
|
|
printf("BMP file loaded successfully!\n");
|
|
|
|
fclose(fd);
|
|
}
|