《GPU高性能编程CUDA实战》是一本不错的好书，其中所含示例代码，经常包含有 "cpu_bitmap.h"等头文件, 为方便学习者查找，将头文件 “cpu_bitmap.h” 分享在这里。
/* * Copyright 1993-2010 NVIDIA Corporation. All rights reserved. * * NVIDIA Corporation and its licensors retain all intellectual property and * proprietary rights in and to this software and related documentation. * Any use, reproduction, disclosure, or distribution of this software * and related documentation without an express license agreement from * NVIDIA Corporation is strictly prohibited. * * Please refer to the applicable NVIDIA end user license agreement (EULA) * associated with this source code for terms and conditions that govern * your use of this NVIDIA software. * */ #ifndef __CPU_BITMAP_H__ #define __CPU_BITMAP_H__ #include "gl_helper.h" struct CPUBitmap { unsigned char *pixels; int x, y; void *dataBlock; void (*bitmapExit)(void*); CPUBitmap( int width, int height, void *d = NULL ) { pixels = new unsigned char[width * height * 4]; x = width; y = height; dataBlock = d; } ~CPUBitmap() { delete [] pixels; } unsigned char* get_ptr( void ) const { return pixels; } long image_size( void ) const { return x * y * 4; } void display_and_exit( void(*e)(void*) = NULL ) { CPUBitmap** bitmap = get_bitmap_ptr(); *bitmap = this; bitmapExit = e; // a bug in the Windows GLUT implementation prevents us from // passing zero arguments to glutInit() int c=1; char* dummy = ""; glutInit( &c, &dummy ); glutInitDisplayMode( GLUT_SINGLE | GLUT_RGBA ); glutInitWindowSize( x, y ); glutCreateWindow( "bitmap" ); glutKeyboardFunc(Key); glutDisplayFunc(Draw); glutMainLoop(); } // static method used for glut callbacks static CPUBitmap** get_bitmap_ptr( void ) { static CPUBitmap *gBitmap; return &gBitmap; } // static method used for glut callbacks static void Key(unsigned char key, int x, int y) { switch (key) { case 27: CPUBitmap* bitmap = *(get_bitmap_ptr()); if (bitmap->dataBlock != NULL && bitmap->bitmapExit != NULL) bitmap->bitmapExit( bitmap->dataBlock ); exit(0); } } // static method used for glut callbacks static void Draw( void ) { CPUBitmap* bitmap = *(get_bitmap_ptr()); glClearColor( 0.0, 0.0, 0.0, 1.0 ); glClear( GL_COLOR_BUFFER_BIT ); glDrawPixels( bitmap->x, bitmap->y, GL_RGBA, GL_UNSIGNED_BYTE, bitmap->pixels ); glFlush(); } }; #endif // __CPU_BITMAP_H__