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#include "Raster.h"
#include "FreeImage.h"
namespace CELL{ Image* Image::loadFromFile(const char* fileName) { //1 ��ȡͼƬ��ʽ
FREE_IMAGE_FORMAT fifmt = FreeImage_GetFileType(fileName, 0); if (fifmt == FIF_UNKNOWN) { return 0; } //2 ����ͼƬ
FIBITMAP *dib = FreeImage_Load(fifmt, fileName,0);
FREE_IMAGE_COLOR_TYPE type = FreeImage_GetColorType(dib);
//! ��ȡ����ָ��
FIBITMAP* temp = dib; dib = FreeImage_ConvertTo32Bits(dib); FreeImage_Unload(temp);
BYTE* pixels = (BYTE*)FreeImage_GetBits(dib); int width = FreeImage_GetWidth(dib); int height = FreeImage_GetHeight(dib);
int pitch = width*4; BYTE* row = new BYTE[width*4]; for(int j = 0; j < height / 2; j++) { memcpy(row,pixels + j * pitch,pitch );
memcpy(pixels + j * pitch,pixels + (height - j - 1) * pitch,pitch );
memcpy(pixels + (height - j - 1) * pitch,row,pitch );
} delete []row;
Image* image = new Image(width,height,pixels); FreeImage_Unload(dib);
return image; }
Raster::Raster( int w,int h,void* buffer ) { _texture = 0; _width = w; _height = h; _buffer = (uint*)buffer; memset(&_poitionPointer,0, sizeof(_poitionPointer)); memset(&_colorPointer, 0, sizeof(_colorPointer)); memset(&_uvPointer, 0, sizeof(_uvPointer));
_defaultColorPointer._size = 4; _defaultColorPointer._type = DT_BYTE; _defaultColorPointer._stride= sizeof(Rgba); _defaultColorPointer._data = _defaultColorArray;
_defaultUVPointer._size = 2; _defaultUVPointer._type = DT_FLOAT; _defaultUVPointer._stride = sizeof(float2); _defaultUVPointer._data = _detaultUVArray;
_matModel = CELL::matrix4(1); _matView = CELL::matrix4(1); _matProj = CELL::matrix4(1); }
Raster::~Raster( void ) { }
void Raster::clear() { memset(_buffer,0,_width * _height * sizeof(Rgba)); }
void Raster::drawImage( int startX,int startY,const Image* image ) { int left = tmax<int>(startX,0); int top = tmax<int>(startY,0);
int right = tmin<int>(startX + image->width(),_width); int bottom = tmin<int>(startY + image->height(),_height);
for (int x = left ; x < right ; ++ x) { for (int y = top ; y < bottom ; ++ y) { Rgba color = image->pixelAt(x - left,y - top); setPixelEx(x,y,color); } } }
void Raster::drawArrays( DRAWMODE pri,int start,int count ) { if (_poitionPointer._data == 0) { return; }
DateElementDes colorPointerdesc = _colorPointer; DateElementDes uvPointerdesc = _uvPointer; if (colorPointerdesc._data == 0) { colorPointerdesc = _defaultColorPointer; } if (uvPointerdesc._data == 0) { uvPointerdesc = _defaultUVPointer; } char* posData = (char*)_poitionPointer._data; char* cData = (char*)colorPointerdesc._data; char* uvData = (char*)uvPointerdesc._data;
_matProjView = _matProj * _matView;
matrix4 matPVT = _matProjView.transpose();
_frust.loadFrustum(matPVT);
for(int i = start ;i < start + count; i += 3) { float* fData = (float*)posData; float3 p01 (fData[0],fData[1],fData[2]);
posData += _poitionPointer._stride; fData = (float*)(posData);
float3 p11 (fData[0],fData[1],fData[2]); posData += _poitionPointer._stride; fData = (float*)(posData);
float3 p21 (fData[0],fData[1],fData[2]); posData += _poitionPointer._stride; p01 = p01 * _matModel; p11 = p11 * _matModel; p21 = p21 * _matModel;
if ( _frust.pointInFrustum(p01) || _frust.pointInFrustum(p11) || _frust.pointInFrustum(p21) ) {
p01 = piplineTransform(p01); p11 = piplineTransform(p11); p21 = piplineTransform(p21); //! ת��Ϊ��Ļ����
int2 p0(p01.x,p01.y); int2 p1(p11.x,p11.y); int2 p2(p21.x,p21.y);
Rgba c0 (*(Rgba*)cData); cData += _colorPointer._stride; Rgba c1 (*(Rgba*)cData); cData += _colorPointer._stride; Rgba c2 (*(Rgba*)cData); cData += _colorPointer._stride;
float* pUV = (float*)uvData; float2 uv0 (pUV[0],pUV[1]); uvData += _uvPointer._stride; pUV = (float*)uvData; float2 uv1(pUV[0],pUV[1]); uvData += _uvPointer._stride; pUV = (float*)uvData; float2 uv2(pUV[0],pUV[1]); uvData += _uvPointer._stride;
Ege eges[3] = { Ege(p0.x,p0.y,c0, uv0, p1.x,p1.y,c1, uv1), Ege(p1.x,p1.y,c1, uv1, p2.x,p2.y,c2, uv2), Ege(p2.x,p2.y,c2, uv2, p0.x,p0.y,c0, uv0), }; drawTrianle(eges);
if (_colorPointer._data == 0) { cData = (char*)colorPointerdesc._data; } if (_uvPointer._data == 0 ) {
uvData = (char*)uvPointerdesc._data; } } } }
void Raster::bindTexture( Image* image ) { _texture = image; }
void Raster::textureCoordPointer( int size,DATETYPE type,int stride,const void* data ) { _uvPointer._size = size; _uvPointer._type = type; _uvPointer._stride = stride; _uvPointer._data = data; }
void Raster::colorPointer( int size,DATETYPE type,int stride,const void* data ) { _colorPointer._size = size; _colorPointer._type = type; _colorPointer._stride = stride; _colorPointer._data = data; }
void Raster::vertexPointer( int size,DATETYPE type,int stride,const void* data ) { _poitionPointer._size = size; _poitionPointer._type = type; _poitionPointer._stride = stride; _poitionPointer._data = data; }
void Raster::loadMatrix( const CELL::matrix4& mat ) { _matModel = mat; }
void Raster::loadIdentity() { _matModel = CELL::matrix4(1); } void Raster::loadProjMatrix( const CELL::matrix4& mat ) { _matProj = mat; } void Raster::loadProjIdentity( const CELL::matrix4& mat ) { _matProj = CELL::matrix4(1); }
void Raster::loadViewMatrix( const CELL::matrix4& mat ) { _matView = mat; } void Raster::loadViewIdentity( const CELL::matrix4& mat ) { _matView = CELL::matrix4(1); }
void Raster::setPerspective( float fovy, float aspect, float zNear, float zFar ) { _matProj = CELL::perspective<float>(fovy,aspect,zNear,zFar); }
void Raster::lookat( float3 const & eye,float3 const & center,float3 const & up ) { _matView = CELL::lookAt(eye,center,up); }
void Raster::setViewPort( int x,int y,int w,int h ) { _viewPort.x = w; _viewPort.y = h; }
}
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