Texture.cpp
上传用户:hkb425
上传日期:2007-06-16
资源大小:34191k
文件大小:15k
- // Texture.cpp: implementation of the CTexture class.
- //
- //////////////////////////////////////////////////////////////////////
- #include "stdafx.h"
- #include "Texture.h"
- //////////////////////////////////////////////////////////////////////
- // Construction/Destruction
- //////////////////////////////////////////////////////////////////////
- CTexture::CTexture()
- {
- }
- bool CTexture::MakeTextureBind(char* TextureFileName,unsigned int* TextureID,
- bool bLinear,bool bMip)
- {
- bool status=true; // Status Indicator
- AUX_RGBImageRec *Image=NULL;
- ///////////////////load wall tex
- if (Image=auxDIBImageLoad(TextureFileName))
- {
-
- /* for(int y=0;y<Image->sizeY;y+=2)
- for(int x=0;x<Image->sizeX;x++)
- {
- Image->data[y*Image->sizeY*3+x*3+0]=0;
- Image->data[y*Image->sizeY*3+x*3+1]=0;
- Image->data[y*Image->sizeY*3+x*3+2]=0;
- }*/
- glGenTextures(1, TextureID); // Create one Texture
- glBindTexture(GL_TEXTURE_2D, *TextureID);
- if(bLinear)
- {
- ///////////////////////////////
- if(bMip)
- {
- glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
- glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
- gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB8, Image->sizeX, Image->sizeY, GL_RGB, GL_UNSIGNED_BYTE, Image->data);
- }
- else
- {
- glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);
- glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, Image->sizeX, Image->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, Image->data);
- }
- }
- else
- {
- if(bMip)
- {
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST_MIPMAP_NEAREST);
- gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB8, Image->sizeX, Image->sizeY, GL_RGB, GL_UNSIGNED_BYTE, Image->data);
- }
- else
- {
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, Image->sizeX, Image->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, Image->data);
- }
- }
- }
- else status=false;
- if (Image) { // If Texture Exists
- if (Image->data) delete Image->data; // If Texture Image Exists
- delete Image;
- }
- return status;
- }
- bool CTexture::MakeSkinTextureBind(char* TextureFileName,unsigned int* TextureID,
- bool bLinear,bool bMip)
- {
- bool state=true; // Status Indicator
- unsigned char *Image=new unsigned char [256*256*3];
- FILE* file;
- if((file= fopen(TextureFileName, "rb"))==NULL)
- {
- state=false;
- return state;
- }
- char id[10],version;
- fread(id, sizeof(char),10, file);
- fread(&version,sizeof(char),1, file);
- if ( strncmp( id, "Hunter3D00", 10 ) != 0 )
- {
- fclose(file);
- return false; // "Not a valid .skn file."
- }
- if ( version !=1 )
- {
- fclose(file);
- return false; // "Not a valid .skn file."
- }
- fread(Image,sizeof(unsigned char),256*256*3,file);
- fclose(file);
- file=NULL;
-
- glGenTextures(1, TextureID); // Create one Texture
- glBindTexture(GL_TEXTURE_2D, *TextureID);
- if(bLinear)
- {
- if(bMip)
- {
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
- gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB8, 256, 256, GL_RGB, GL_UNSIGNED_BYTE, Image);
- }
- else
- {
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8,256,256, 0, GL_RGB, GL_UNSIGNED_BYTE, Image);
- }
- }
- else
- {
- if(bMip)
- {
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST_MIPMAP_NEAREST);
- gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB8, 256, 256, GL_RGB, GL_UNSIGNED_BYTE, Image);
- }
- else
- {
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, 256,256, 0, GL_RGB, GL_UNSIGNED_BYTE, Image);
- }
- }
- delete [] Image; // If Texture Image Exists
- return state;
- }
- /////////////////////////////////////////////////
- bool CTexture::MakeAlphaTextureBind(char* TextureFileName,unsigned int* TextureID)
- {
- bool status=true; // Status Indicator
- AUX_RGBImageRec *Image=NULL; // Create Storage Space For The Texture
- unsigned char *alpha=NULL;
- ////////////////////////////////////
- if (Image=auxDIBImageLoad(TextureFileName))
- {
- alpha=new unsigned char[4*Image->sizeX*Image->sizeY]; // Create Memory For RGBA8-Texture
- for (int a=0; a<Image->sizeX*Image->sizeY; a++)
- {
- alpha[4*a]=Image->data[a*3]; // R
- alpha[4*a+1]=Image->data[a*3+1]; // G
- alpha[4*a+2]=Image->data[a*3+2]; // B
- ////////////Get max
- alpha[4*a+3]=(alpha[4*a+0]<alpha[4*a+1])?alpha[4*a+0]:alpha[4*a+1];
- if(alpha[4*a+2]<alpha[4*a+3])alpha[4*a+3]=alpha[4*a+2];
- }
- ///////////////////////////////////////////////
- glGenTextures(1, TextureID); // Create One Textures
- // Create Linear Filtered RGBA8-Texture
- glBindTexture(GL_TEXTURE_2D, *TextureID);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
- gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA8, Image->sizeX, Image->sizeY, GL_RGBA, GL_UNSIGNED_BYTE, alpha);
- delete [] alpha;
- }
- else status=false;
- if (Image) { // If Texture Exists
- if (Image->data) delete Image->data; // If Texture Image Exists
- delete Image;
- Image=NULL;
- }
- ///////////////////////////////////
- return status;
- }
- bool CTexture::MakeAlphaTextureBind(char* TextureFileName,char *AlphaFileName,unsigned int* TextureID)
- {
- bool status=true; // Status Indicator
- AUX_RGBImageRec *Image=NULL; // Create Storage Space For The Texture
- unsigned char *alpha=NULL;
- ////////////////////////////////////
- if (Image=auxDIBImageLoad(TextureFileName))
- {
- alpha=new unsigned char[4*Image->sizeX*Image->sizeY]; // Create Memory For RGBA8-Texture
- for (int a=0; a<Image->sizeX*Image->sizeY; a++)
- {
- alpha[4*a]=Image->data[a*3]; // R
- alpha[4*a+1]=Image->data[a*3+1]; // G
- alpha[4*a+2]=Image->data[a*3+2]; // B
- }
- /////////////////make alpha chanal
- if(AlphaFileName==NULL)return false;
- FILE* file;
- if((file= fopen(AlphaFileName, "rb"))==NULL)
- return false;
- fseek(file,54,SEEK_SET);
- unsigned char temp[3];
- for ( a=0; a<Image->sizeX*Image->sizeY; a++)
- {
- fread(temp,sizeof(unsigned char),3,file);
- alpha[4*a+3]=(temp[0]>temp[1])?temp[0]:temp[1];
- if(temp[2]>alpha[4*a+3])alpha[4*a+3]=temp[2];
- // alpha[4*a+3]=(temp[0]+temp[1]+temp[2])/3;
- if(alpha[4*a+3]>50)alpha[4*a+3]=255;
- }
- fclose(file);
- ///////////////////////////////////////////////
- glGenTextures(1, TextureID); // Create One Textures
- // Create Linear Filtered RGBA8-Texture
- glBindTexture(GL_TEXTURE_2D, *TextureID);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
- gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA8, Image->sizeX, Image->sizeY, GL_RGBA, GL_UNSIGNED_BYTE, alpha);
- delete [] alpha;
- }
- else status=false;
- if (Image) { // If Texture Exists
- if (Image->data) delete Image->data; // If Texture Image Exists
- delete Image;
- Image=NULL;
- }
- ///////////////////////////////////
- return status;
- }
- bool CTexture::MakeTGAAlphaBind(char* TextureFileName,unsigned int* TextureID)
- {
- FILE * fTGA; // File pointer to texture file
- fTGA = fopen(TextureFileName, "rb"); // Open file for reading
- TGAHeader tgaheader; // TGA header
- Texture texture;
- if(fTGA == NULL) // If it didn't open....
- {
- MessageBox(NULL, "Could not open texture file", "ERROR", MB_OK); // Display an error message
- return false; // Exit function
- }
- if(fread(&tgaheader, sizeof(TGAHeader), 1, fTGA) == 0) // Attempt to read 12 byte header from file
- {
- MessageBox(NULL, "Could not read file header", "ERROR", MB_OK); // If it fails, display an error message
- if(fTGA != NULL) // Check to seeiffile is still open
- {
- fclose(fTGA); // If it is, close it
- }
- return false; // Exit function
- }
- GLubyte uTGAcompare[12] = {0,0,2, 0,0,0,0,0,0,0,0,0}; // Uncompressed TGA Header
- GLubyte cTGAcompare[12] = {0,0,10,0,0,0,0,0,0,0,0,0}; // Compressed TGA Header
- if(memcmp(uTGAcompare, &tgaheader, sizeof(tgaheader)) == 0) // See if header matches the predefined header of
- { // an Uncompressed TGA image
- LoadUncompressedTGA(&texture, TextureFileName, fTGA); // If so, jump to Uncompressed TGA loading code
- }
- else if(memcmp(cTGAcompare, &tgaheader, sizeof(tgaheader)) == 0) // See if header matches the predefined header of
- { // an RLE compressed TGA image
- LoadCompressedTGA(&texture, TextureFileName, fTGA); // If so, jump to Compressed TGA loading code
- }
- else // If header matches neither type
- {
- MessageBox(NULL, "TGA file be type 2 or type 10 ", "Invalid Image", MB_OK); // Display an error
- fclose(fTGA);
- return false; // Exit function
- }
- //////////////////////////////////////////////////////////
- glGenTextures(1, TextureID); // Create One Textures
- // Create Linear Filtered RGBA8-Texture
- glBindTexture(GL_TEXTURE_2D, *TextureID);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR);
- gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA8, texture.width, texture.height, texture.type, GL_UNSIGNED_BYTE, texture.imageData);
- delete [] texture.imageData;
- return true;
- }
- bool CTexture::LoadUncompressedTGA(Texture * texture, char * filename, FILE * fTGA)
- {
- TGA tga;
- if(fread(tga.header, sizeof(tga.header), 1, fTGA) == 0) // Read TGA header
- {
- MessageBox(NULL, "Could not read info header", "ERROR", MB_OK); // Display error
- if(fTGA != NULL) // if file is still open
- {
- fclose(fTGA); // Close it
- }
- return false; // Return failular
- }
- texture->width = tga.header[1] * 256 + tga.header[0]; // Determine The TGA Width (highbyte*256+lowbyte)
- texture->height = tga.header[3] * 256 + tga.header[2]; // Determine The TGA Height (highbyte*256+lowbyte)
- texture->bpp = tga.header[4]; // Determine the bits per pixel
- tga.Width = texture->width; // Copy width into local structure
- tga.Height = texture->height; // Copy height into local structure
- tga.Bpp = texture->bpp; // Copy BPP into local structure
- if((texture->width <= 0) || (texture->height <= 0) || ((texture->bpp != 24) && (texture->bpp !=32))) // Make sure all information is valid
- {
- MessageBox(NULL, "Invalid texture information", "ERROR", MB_OK); // Display Error
- if(fTGA != NULL) // Check if file is still open
- {
- fclose(fTGA); // If so, close it
- }
- return false; // Return failed
- }
- if(texture->bpp == 24) //If the BPP of the image is 24...
- {
- texture->type = GL_RGB; // Set Image type to GL_RGB
- }
- else // Else if its 32 BPP
- {
- texture->type = GL_RGBA; // Set image type to GL_RGBA
- }
- tga.bytesPerPixel = (tga.Bpp / 8); // Compute the number of BYTES per pixel
- tga.imageSize = (tga.bytesPerPixel * tga.Width * tga.Height); // Compute the total amout ofmemory needed to store data
- texture->imageData =new GLubyte[tga.imageSize]; // Allocate that much memory
- if(texture->imageData == NULL) // If no space was allocated
- {
- MessageBox(NULL, "Could not allocate memory for image", "ERROR", MB_OK); // Display Error
- fclose(fTGA); // Close the file
- return false; // Return failed
- }
- if(fread(texture->imageData, 1, tga.imageSize, fTGA) != tga.imageSize) // Attempt to read image data
- {
- MessageBox(NULL, "Could not read image data", "ERROR", MB_OK); // Display Error
- if(texture->imageData != NULL) // If imagedata has data in it
- {
- free(texture->imageData); // Delete data from memory
- }
- fclose(fTGA); // Close file
- return false; // Return failed
- }
- for(GLuint cswap = 0; cswap < (int)tga.imageSize; cswap += tga.bytesPerPixel) // Swap color bytes from BGR to RGB
- {
- tga.temp = texture->imageData[cswap];
- texture->imageData[cswap] = texture->imageData[cswap + 2];
- texture->imageData[cswap + 2] = tga.temp;
- }
- fclose(fTGA);
- return true;
- }
- bool CTexture::LoadCompressedTGA(Texture * texture, char * filename, FILE * fTGA)
- {
- return false;
- }
- bool CTexture::MakeScreenTextureBind(unsigned int* TextureID)
- {
- //
- if(glIsTexture(* TextureID)==GL_TRUE)
- {
- // glBindTexture(GL_TEXTURE_2D, *TextureID);
- // glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, 0,0, 512,512 );
- }
- else
- {
- GLint Viewport[4];
- glGetIntegerv(GL_VIEWPORT, Viewport);
- int newWidth=128;
- unsigned char *pData=new unsigned char[newWidth*newWidth*3+6]; // +6 for safe
- /////////////找到pData(x,y)对应屏幕上的象素点(sx,sy)
- int sx,sy; //标记新的位置
- unsigned char temp[6];
- for(int y=0;y<newWidth;y++)
- for(int x=0;x<newWidth;x++)
- {
- sx=int(float(x*Viewport[2])/newWidth);
- sy=int(float(y*Viewport[3])/newWidth);
- glReadPixels(sx,sy,1,1,
- GL_RGB,GL_UNSIGNED_BYTE,temp);
- pData[y*newWidth*3+x*3+0]=unsigned char(temp[0]*0.8f);
- pData[y*newWidth*3+x*3+1]=unsigned char(temp[1]*0.8f);
- pData[y*newWidth*3+x*3+2]=unsigned char(temp[2]*0.8f);
- }
- ////////////////////////////////////////////////////////////
- glGenTextures(1, TextureID); // Create one Texture
- glBindTexture(GL_TEXTURE_2D, *TextureID);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, newWidth,newWidth, 0, GL_RGB, GL_UNSIGNED_BYTE,pData);
- delete [] pData;
- }
- return true;
- }
- CTexture::~CTexture()
- {
- }