《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_anim.h"等头文件, 为方便学习者查找，将头文件 “cpu_anim.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_ANIM_H__ #define __CPU_ANIM_H__ #include "gl_helper.h" #include <iostream> struct CPUAnimBitmap { unsigned char *pixels; int width, height; void *dataBlock; void (*fAnim)(void*,int); void (*animExit)(void*); void (*clickDrag)(void*,int,int,int,int); int dragStartX, dragStartY; CPUAnimBitmap( int w, int h, void *d = NULL ) { width = w; height = h; pixels = new unsigned char[width * height * 4]; dataBlock = d; clickDrag = NULL; } ~CPUAnimBitmap() { delete [] pixels; } unsigned char* get_ptr( void ) const { return pixels; } long image_size( void ) const { return width * height * 4; } void click_drag( void (*f)(void*,int,int,int,int)) { clickDrag = f; } void anim_and_exit( void (*f)(void*,int), void(*e)(void*) ) { CPUAnimBitmap** bitmap = get_bitmap_ptr(); *bitmap = this; fAnim = f; animExit = 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_DOUBLE | GLUT_RGBA ); glutInitWindowSize( width, height ); glutCreateWindow( "bitmap" ); glutKeyboardFunc(Key); glutDisplayFunc(Draw); if (clickDrag != NULL) glutMouseFunc( mouse_func ); glutIdleFunc( idle_func ); glutMainLoop(); } // static method used for glut callbacks static CPUAnimBitmap** get_bitmap_ptr( void ) { static CPUAnimBitmap* gBitmap; return &gBitmap; } // static method used for glut callbacks static void mouse_func( int button, int state, int mx, int my ) { if (button == GLUT_LEFT_BUTTON) { CPUAnimBitmap* bitmap = *(get_bitmap_ptr()); if (state == GLUT_DOWN) { bitmap->dragStartX = mx; bitmap->dragStartY = my; } else if (state == GLUT_UP) { bitmap->clickDrag( bitmap->dataBlock, bitmap->dragStartX, bitmap->dragStartY, mx, my ); } } } // static method used for glut callbacks static void idle_func( void ) { static int ticks = 1; CPUAnimBitmap* bitmap = *(get_bitmap_ptr()); bitmap->fAnim( bitmap->dataBlock, ticks++ ); glutPostRedisplay(); } // static method used for glut callbacks static void Key(unsigned char key, int x, int y) { switch (key) { case 27: CPUAnimBitmap* bitmap = *(get_bitmap_ptr()); bitmap->animExit( bitmap->dataBlock ); //delete bitmap; exit(0); } } // static method used for glut callbacks static void Draw( void ) { CPUAnimBitmap* bitmap = *(get_bitmap_ptr()); glClearColor( 0.0, 0.0, 0.0, 1.0 ); glClear( GL_COLOR_BUFFER_BIT ); glDrawPixels( bitmap->width, bitmap->height, GL_RGBA, GL_UNSIGNED_BYTE, bitmap->pixels ); glutSwapBuffers(); } }; #endif // __CPU_ANIM_H__