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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);
Image* image = new Image(width,height,pixels); FreeImage_Unload(dib);
return image; }
Raster::Raster( int w,int h,void* buffer ) { _width = w; _height = h; _buffer = (uint*)buffer; }
Raster::~Raster( void ) {
}
void Raster::clear() { memset(_buffer,0,_width * _height * sizeof(Rgba)); }
void Raster::drawPoint( int x,int y, Rgba color,int ptSize ) { switch(ptSize) { case 1: setPixel(x,y,color); break; case 2: setPixel(x + 0, y + 0,color); setPixel(x + 1, y + 0,color); setPixel(x + 0, y + 1,color); setPixel(x + 1, y + 1,color); break; case 3:
setPixel(x - 1, y - 1,color); setPixel(x + 0, y - 1,color); setPixel(x + 1, y - 1,color);
setPixel(x - 1, y + 0,color); setPixel(x + 0, y + 0,color); setPixel(x + 1, y + 0,color);
setPixel(x - 1, y + 1,color); setPixel(x + 0, y + 1,color); setPixel(x + 1, y + 1,color);
break; } }
void Raster::drawLine( float2 pt1,float2 pt2,Rgba color1,Rgba color2 ) { float xOffset = pt1.x - pt2.x; float yOffset = pt1.y - pt2.y;
if (xOffset == 0 && yOffset == 0) { setPixel(pt1.x,pt1.y,color1); }
if (fabs(xOffset) > fabs(yOffset)) { float xMin; float xMax; if (pt1.x < pt2.x) { xMin = pt1.x; xMax = pt2.x; } else { xMin = pt2.x; xMax = pt1.x; } float lenth = xMax - xMin; float slope = yOffset / xOffset; for (float x = xMin; x <= xMax ; x += 1.0f) { float y = pt1.y + (x - pt1.x) * slope; float scaler = (x - xMin)/lenth; Rgba color = colorLerp(color1,color2,scaler); setPixel(x,y,color); } } else { float yMin; float yMax; if (pt1.y < pt2.y) { yMin = pt1.y; yMax = pt2.y; } else { yMin = pt2.y; yMax = pt1.y; }
float lenth = yMax - yMin; float slope = xOffset / yOffset; for (float y = yMin; y <= yMax ; y += 1.0f) { float x = pt1.x + (y - pt1.y) * slope; float scaler = (y - yMin)/lenth; Rgba color = colorLerp(color1,color2,scaler); setPixel(x,y,color); } } }
void Raster::drawArrays( DRAWMODE mode,const float2* points,int count ) { switch (mode) { case DM_POINTS: { for (int i = 0 ;i < count ; ++ i) { drawPoints(points[i],_color); } } break; case DM_LINES: { count = count/2 * 2; for (int i = 0 ;i < count ; i += 2) { drawLine(points[i],points[i + 1],_color,_color); } } break; case DM_LINE_LOOP: { drawLine(points[0],points[1],_color,_color); for (int i = 2 ;i < count ; ++ i) { drawLine(points[i - 1],points[i],_color,_color); } drawLine(points[0],points[count - 1],_color,_color); } break; case DM_LINE_STRIP: { drawLine(points[0],points[1],_color,_color); for (int i = 2 ;i < count ; ++ i) { drawLine(points[i - 1],points[i],_color,_color); } } break; default: break; } }
void Raster::drawFilleRect( int startX,int startY,int w,int h ) { int left = tmax<int>(startX,0); int top = tmax<int>(startY,0);
int right = tmin<int>(startX + w,_width); int bottom = tmin<int>(startY + h,_height);
for (int x = left ; x < right ; ++ x) { for (int y = top ; y < bottom ; ++ y) { setPixelEx(x,y,_color); } } }
void Raster::drawRect( const int2* points,const Rgba* colors ) { int left = tmax<int>(points[0].x,0); int top = tmax<int>(points[0].y,0);
int right = tmin<int>(points[2].x,_width); int bottom = tmin<int>(points[2].y,_height);
float w = right - left; float h = bottom - top;
for (int x = left ; x < right ; ++ x) { Rgba color1 = colorLerp(colors[0],colors[1],(x - left)/w); Rgba color2 = colorLerp(colors[3],colors[2],(x - left)/w);
for (int y = top ; y < bottom ; ++ y) { Rgba color = colorLerp(color1,color2,(y - top)/h); setPixelEx(x,y,color); } } }
}
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