OpenGL纹理贴图

任务：绘制有桌子茶壶，墙壁地板的简单三维场景，加载图片作为纹理，注意灯光的设置和场景的旋转。

#include
#include 
#include 
#include 
#include 
#include 
#include "FreeImage.h"

#define Height 16
#define Width 16

GLfloat white[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat light_pos[] = { 5,5,5,1 };
float eye[] = { -3,3, 7 };
float center[] = { 0, 0, 0 };
float place[] = { 0, 0, 5.6 };
#define ERROR(...)		printf(__VA_ARGS__);exit(0)


float fRotate = 0.0f;
float fScale = 1.0f; //

float tRotate = 0.0f; 

bool bPersp = false; 
bool bAnim = false; 
bool isRotate = false; 
int wHeight = 0;
int wWidth = 0;

//int min(int x, int y)
//{
//	return x < y ? x : y;
//}


typedef struct
{
	int			w;
	int 			h;
	unsigned char	        *buf;
	GLuint			rgb_mode;
}GLBITMAP;


static GLuint	S_png_tex = 0;
static GLuint	S_jpg_tex = 0;
static GLuint 	S_bmp_tex = 0;
static GLuint	S_tga_tex = 0;
static GLuint	S_ico_tex = 0;

GLBITMAP * FIBitmap2GLBitmap(FIBITMAP *fibmp)
{
	int i, j, k;
	int pitch = FreeImage_GetPitch(fibmp);
	unsigned char *bits = FreeImage_GetBits(fibmp);
	int bpp = FreeImage_GetBPP(fibmp);
	GLBITMAP *glbmp = (GLBITMAP *)malloc(sizeof(GLBITMAP));
	RGBQUAD *palette = NULL;

	if (!glbmp) return NULL;

	glbmp->w = FreeImage_GetWidth(fibmp);
	glbmp->h = FreeImage_GetHeight(fibmp);

	switch (bpp) {
	case 8:
		if (!(palette = FreeImage_GetPalette(fibmp))) return NULL;
		if (!(glbmp->buf = (unsigned char *)malloc(glbmp->w*glbmp->h * 3))) return NULL;
		glbmp->rgb_mode = GL_RGB;
		for (i = 0; i < glbmp->h; ++i) {
			for (j = 0; j < glbmp->w; ++j) {
				k = bits[i*pitch + j];
				glbmp->buf[(i*glbmp->w + j) * 3 + 0] = palette[k].rgbRed;
				glbmp->buf[(i*glbmp->w + j) * 3 + 1] = palette[k].rgbGreen;
				glbmp->buf[(i*glbmp->w + j) * 3 + 2] = palette[k].rgbBlue;
			}
		}
		break;
	case 24:
		if (!(glbmp->buf = (unsigned char *)malloc(glbmp->w*glbmp->h * 3))) return NULL;
		glbmp->rgb_mode = GL_RGB;
		for (i = 0; i < glbmp->h; ++i) {
			for (j = 0; j < glbmp->w; ++j) {
				glbmp->buf[(i*glbmp->w + j) * 3 + 0] = bits[i*pitch + j * 3 + 2];
				glbmp->buf[(i*glbmp->w + j) * 3 + 1] = bits[i*pitch + j * 3 + 1];
				glbmp->buf[(i*glbmp->w + j) * 3 + 2] = bits[i*pitch + j * 3 + 0];
			}
		}
		break;
	case 32:
		if (!(glbmp->buf = (unsigned char *)malloc(glbmp->w*glbmp->h * 4))) return NULL;
		glbmp->rgb_mode = GL_RGBA;
		for (i = 0; i < glbmp->h; ++i) {
			for (j = 0; j < glbmp->w; ++j) {
				glbmp->buf[(i*glbmp->w + j) * 4 + 0] = bits[i*pitch + j * 4 + 2];
				glbmp->buf[(i*glbmp->w + j) * 4 + 1] = bits[i*pitch + j * 4 + 1];
				glbmp->buf[(i*glbmp->w + j) * 4 + 2] = bits[i*pitch + j * 4 + 0];
				glbmp->buf[(i*glbmp->w + j) * 4 + 3] = bits[i*pitch + j * 4 + 3];
			}
		}
		break;
	default: return NULL;
	}

	return glbmp;
}
void FreeGLBitmap(GLBITMAP *glbmp)
{
	if (glbmp) {
		if (glbmp->buf) free(glbmp->buf);
		free(glbmp);
	}
}


GLuint loadtexture(const char *filename)
{
	GLuint tex = 0;
	int tmp_bit;
	int i;
	int w, h;
	int bpp;
	unsigned char *bits = NULL;
	FREE_IMAGE_FORMAT fif = FIF_UNKNOWN;
	FIBITMAP *bitmap = NULL;
	GLBITMAP *glbmp = NULL;

	fif = FreeImage_GetFileType(filename, 0);
	if (FIF_UNKNOWN == fif) {
		fif = FreeImage_GetFIFFromFilename(filename);
		if (FIF_UNKNOWN == fif)
			return 0;
	}
	if (FreeImage_FIFSupportsReading(fif))
		bitmap = FreeImage_Load(fif, filename, 0);

	if (!bitmap)
		return 0;

	printf("bit: %d\n", FreeImage_GetBPP(bitmap));

	glbmp = FIBitmap2GLBitmap(bitmap);
	if (!glbmp)
		return 0;

	glGenTextures(1, &tex);
	glBindTexture(GL_TEXTURE_2D, tex);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexImage2D(GL_TEXTURE_2D, 0, glbmp->rgb_mode, glbmp->w, glbmp->h, 0, glbmp->rgb_mode, GL_UNSIGNED_BYTE, glbmp->buf);

	FreeGLBitmap(glbmp);
	FreeImage_Unload(bitmap);

	return tex;
}


void drawCube()
{
	glBindTexture(GL_TEXTURE_2D, S_bmp_tex);   // 选择纹理
	glBegin(GL_QUADS);
	// 前面
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的左上
	glEnd();
	// 后面
	glBindTexture(GL_TEXTURE_2D, S_bmp_tex);   // 选择纹理
	glBegin(GL_QUADS);
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的左下
	glEnd();

	glBindTexture(GL_TEXTURE_2D, S_bmp_tex);   // 选择纹理
	glBegin(GL_QUADS);
	// 顶面
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glEnd();

	glBindTexture(GL_TEXTURE_2D, S_bmp_tex);  // 选择纹理
	glBegin(GL_QUADS);
	// 底面
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	// 右面
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	// 左面
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glEnd();
}


void drawCube2()
{
	glBindTexture(GL_TEXTURE_2D, S_png_tex);   // 选择纹理
	glBegin(GL_QUADS);
	// 前面
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的左上
	glEnd();
	// 后面
	glBindTexture(GL_TEXTURE_2D, S_png_tex);   // 选择纹理
	glBegin(GL_QUADS);
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的左下
	glEnd();

	glBindTexture(GL_TEXTURE_2D, S_png_tex);   // 选择纹理
	glBegin(GL_QUADS);
	// 顶面
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glEnd();

	glBindTexture(GL_TEXTURE_2D, S_png_tex);  // 选择纹理
	glBegin(GL_QUADS);
	// 底面
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	// 右面
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	// 左面
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glEnd();
}

void drawCube3()
{
	glBindTexture(GL_TEXTURE_2D, S_jpg_tex);   // 选择纹理
	glBegin(GL_QUADS);
	// 前面
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的左上
	glEnd();
	// 后面
	glBindTexture(GL_TEXTURE_2D, S_jpg_tex);   // 选择纹理
	glBegin(GL_QUADS);
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的左下
	glEnd();

	glBindTexture(GL_TEXTURE_2D, S_jpg_tex);   // 选择纹理
	glBegin(GL_QUADS);
	// 顶面
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glEnd();

	glBindTexture(GL_TEXTURE_2D, S_jpg_tex);  // 选择纹理
	glBegin(GL_QUADS);
	// 底面
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	// 右面
	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, -1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, 1.0f); // 纹理和四边形的左上
	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 1.0f); // 纹理和四边形的左下
	// 左面
	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f); // 纹理和四边形的左下
	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // 纹理和四边形的右下
	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // 纹理和四边形的右上
	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f); // 纹理和四边形的左上
	glEnd();
}

//绘制腿部
void Draw_Leg()
{
	glScalef(0.8, 0.8, 3);
	drawCube3();
}

void Draw_Scene(float place[])
{
	//画茶壶
	glEnable(GL_TEXTURE_2D);
	glPushMatrix();
	glColor4f(0.51, 0.0, 0.1, 0.0);
	glTranslatef(place[0], place[1], place[2]);
	glRotatef(90, 1, 0, 0);
	glRotatef(tRotate, 0, 1, 0);
	glutSolidTeapot(1);
	glPopMatrix();

	//画桌面
	glPushMatrix();
	glColor4f(0.1, 1.0, 0.1, 0.0);
	glTranslatef(0, 0, 3.8);
	glScalef(5, 4, 1);
	drawCube3();
	glPopMatrix();

	//画四条腿
	glPushMatrix();
	glColor4f(1.0, 0.5, 0.4, 0.0);
	glTranslatef(3, 2.5, 1.5);
	Draw_Leg();
	glPopMatrix();

	glPushMatrix();
	glColor4f(1.0, 0.5, 0.4, 0.0);
	glTranslatef(-3, 2.5, 1.5);
	Draw_Leg();
	glPopMatrix();

	glPushMatrix();
	glColor4f(1.0, 0.5, 0.4, 0.0);
	glTranslatef(3, -2.5, 1.5);
	Draw_Leg();
	glPopMatrix();

	glPushMatrix();
	glColor4f(1.0, 0.5, 0.4, 0.0);
	glTranslatef(-3, -2.5, 1.5);
	Draw_Leg();
	glPopMatrix();

	//画墙
	glEnable(GL_TEXTURE_2D);
	glPushMatrix();
	glTranslatef(7, -1, 5);
	glRotatef(90, 1, 90, 0);
	glScalef(6, 7, 1);
	drawCube2();
	glPopMatrix();

	//画墙
	glEnable(GL_TEXTURE_2D);
	glPushMatrix();
	glTranslatef(0, 6, 5);
	glRotatef(90, 90, 0, 1);
	glScalef(8.3, 6, 1);
	drawCube2();
	glPopMatrix();


	//地板
	glPushMatrix();
	glTranslatef(-1, -1, -1);
	glRotatef(0, 1, 90, 0);
	glScalef(7,7, 0.2);
	drawCube();
	glPopMatrix();
}
#define LOADTEXTURE(t, f)	do{ if(!((t) = loadtexture(f))){ ERROR("load texture(%s) failed!\n", f); } }while(0)


void updateView(int width, int height)
{
	glViewport(0, 0, width, height);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();	 

	float whRatio = (GLfloat)width / (GLfloat)height;

	if (bPersp) {
		gluPerspective(45, whRatio, 1, 100); 
		//参数：

		//GLdouble fovy 视角
		//GLdouble aspect 宽高比
		//GLdouble zNear 近处
		//GLdouble zFar 远处
	}
	else
		glOrtho(-3, 3, -3, 3, -100, 100); //正投影
		//参数

		//GLdouble left,
		//GLdouble right,
		//GLdouble bottom,
		//GLdouble top,
		//GLdouble near,
		//GLdouble far

	glMatrixMode(GL_MODELVIEW);	//设置矩阵模式为模型
}

void reshape(int width, int height)
{
	if (height == 0)	//如果高度为0
	{
		height = 1;	//让高度为1（避免出现分母为0的现象）
	}

	height = width = min(height, width);
	wHeight = height;
	wWidth = width;

	updateView(wHeight, wWidth); //更新视角
}

void idle()
{
	glutPostRedisplay();//调用当前绘制函数 
}


//按键回调函数
void key(unsigned char k, int x, int y)
{
	switch (k)
	{
	case 'q': {exit(0); break; } //退出
	case 'p': {bPersp = !bPersp; updateView(wHeight, wWidth); break; } //切换正投影、透视投影

	case ' ': {bAnim = !bAnim; break; } //旋转模式的切换


	//整体操作

	case 'a': { //向左移动
		center[0] += 0.1f;
		eye[0] += 0.1f;
		break;
	}
	case 'd': { //向右移动
		center[0] -= 0.1f;
		eye[0] -= 0.1f;
		break;
	}
	case 'w': { //向上移动
		center[1] -= 0.1f;
		eye[1] -= 0.1f;
		break;
	}
	case 's': { //向下移动
		center[1] += 0.1f;
		eye[1] += 0.1f;
		break;
	}
	case 'z': { //向前移动
		center[2] -= 0.1f;
		eye[2] -= 0.1f;
		break;
	}
	case 'c': { //向后移动
		center[2] += 0.1f;
		eye[2] += 0.1f;
		break;
	}

			  //茶壶相关操作

	case 'l': { //右移茶壶
		place[0] += 0.1f;
		if (place[0] > 1.5f)place[0] = 1.5f; //不超出桌面范围
		break;
	}
	case 'j': { //左移茶壶
		place[0] -= 0.1f;
		if (place[0] < -1.5f)place[0] = -1.5f;
		break;
	}
	case 'i': { //后移茶壶
		place[1] += 0.1f;
		if (place[1] > 1.5f)place[1] = 1.5f;
		break;
	}
	case 'k': { //前移茶壶
		place[1] -= 0.1f;
		if (place[1] < -1.5f)place[1] = -1.5f;
		break;
	}
	case 'e': { //旋转茶壶
		isRotate = !isRotate;
		break;
	}
	}
}


void redraw()
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity(); 

	gluLookAt(eye[0], eye[1], eye[2],center[0], center[1], center[2],0, 1, 0);

	{
		glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); 
	}
	glEnable(GL_LIGHTING); 
	GLfloat white[] = { 1.0, 1.0, 1.0, 1.0 }; 
	GLfloat light_pos[] = { 1,1,1,0 };  

	glLightfv(GL_LIGHT0, GL_POSITION, light_pos); 
	glLightfv(GL_LIGHT0, GL_AMBIENT, white); 
	glEnable(GL_LIGHT0); 
//	glLightf(GL_LIGHT1, GL_SPOT_EXPONENT, 1);
	glRotatef(fRotate, 0, 1.0f, 0);	
	glRotatef(-90, 1, 0, 0); 
	glScalef(0.2, 0.2, 0.2); 
	Draw_Scene(place); 

	if (bAnim) fRotate += 0.5f;
	if (isRotate) tRotate += 0.5f; //茶壶旋转

	glutSwapBuffers(); 
#if defined(FREEIMAGE_LIB)
	FreeImage_Initialise(0);
#endif

	LOADTEXTURE(S_bmp_tex, "diban.png");
	LOADTEXTURE(S_png_tex, "qiangbi.png");
	LOADTEXTURE(S_jpg_tex, "qwe.png");
	LOADTEXTURE(S_tga_tex, "chahu.jpg");

	glEnable(GL_TEXTURE_2D);
	glShadeModel(GL_SMOOTH);
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	glClearDepth(1.0f);
	glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LEQUAL);
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}

int main(int argc, char *argv[])
{
	glutInit(&argc, argv);//对glut的初始化 
	glutInitDisplayMode(GLUT_RGBA | GLUT_DEPTH | GLUT_DOUBLE);
	glutInitWindowSize(480, 480);//设置窗口大小  
	int windowHandle = glutCreateWindow("午夜茶室");//设置窗口标题   

	glutDisplayFunc(redraw);
	glutReshapeFunc(reshape);
	glutKeyboardFunc(key);
	glutIdleFunc(idle);

	glutMainLoop();// glut事件处理循环
	return 0;
}