From fc2f5b2cd655f1391f2abda1b39e37cdec98a951 Mon Sep 17 00:00:00 2001
From: Felix Domke <tmbinc@elitedvb.net>
Date: Fri, 17 Oct 2003 15:35:43 +0000
Subject: Initial revision

---
 lib/gdi/gpixmap.cpp | 295 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 295 insertions(+)
 create mode 100644 lib/gdi/gpixmap.cpp

(limited to 'lib/gdi/gpixmap.cpp')

diff --git a/lib/gdi/gpixmap.cpp b/lib/gdi/gpixmap.cpp
new file mode 100644
index 00000000..c089051d
--- /dev/null
+++ b/lib/gdi/gpixmap.cpp
@@ -0,0 +1,295 @@
+#include <lib/gdi/gpixmap.h>
+
+gLookup::gLookup()
+{
+	size=0;
+	lookup=0;
+}
+
+gLookup::gLookup(int size, const gPalette &pal, const gRGB &start, const gRGB &end)
+{
+	size=0;
+	lookup=0;
+	build(size, pal, start, end);
+}
+
+void gLookup::build(int _size, const gPalette &pal, const gRGB &start, const gRGB &end)
+{
+	if (lookup)
+	{
+		delete lookup;
+		lookup=0;
+		size=0;
+	}
+	size=_size;
+	if (!size)
+		return;
+	lookup=new gColor[size];
+	
+	for (int i=0; i<size; i++)
+	{
+		gRGB col;
+		if (i)
+		{
+			int rdiff=-start.r+end.r;
+			int gdiff=-start.g+end.g;
+			int bdiff=-start.b+end.b;
+			int adiff=-start.a+end.a;
+			rdiff*=i; rdiff/=(size-1);
+			gdiff*=i; gdiff/=(size-1);
+			bdiff*=i; bdiff/=(size-1);
+			adiff*=i; adiff/=(size-1);
+			col.r=start.r+rdiff;
+			col.g=start.g+gdiff;
+			col.b=start.b+bdiff;
+			col.a=start.a+adiff;
+		} else
+			col=start;
+		lookup[i]=pal.findColor(col);
+	}
+}
+
+DEFINE_REF(gPixmap);
+
+void gPixmap::fill(const eRect &area, const gColor &color)
+{
+	if ((area.height()<=0) || (area.width()<=0))
+		return;
+	if (bpp == 8)
+		for (int y=area.top(); y<area.bottom(); y++)
+			memset(((__u8*)data)+y*stride+area.left(), color.color, area.width());
+	else if (bpp == 32)
+		for (int y=area.top(); y<area.bottom(); y++)
+		{
+			__u32 *dst=(__u32*)(((__u8*)data)+y*stride+area.left()*bypp);
+			int x=area.width();
+			__u32 col;
+
+			if (clut.data && color < clut.colors)
+				col=(clut.data[color].a<<24)|(clut.data[color].r<<16)|(clut.data[color].g<<8)|(clut.data[color].b);
+			else
+				col=0x10101*color;
+			col^=0xFF000000;			
+			while (x--)
+				*dst++=col;
+		}
+	else
+		eWarning("couldn't fill %d bpp", bpp);
+}
+
+void gPixmap::blit(const gPixmap &src, ePoint pos, const eRect &clip, int flag)
+{
+	
+	eRect area=eRect(pos, src.getSize());
+	if (!clip.isNull())
+		area&=clip;
+	area&=eRect(ePoint(0, 0), getSize());
+	if ((area.width()<0) || (area.height()<0))
+		return;
+	
+	eRect srcarea=area;
+	srcarea.moveBy(-pos.x(), -pos.y());
+
+	if ((bpp == 8) && (src.bpp==8))
+	{
+		__u8 *srcptr=(__u8*)src.data;
+		__u8 *dstptr=(__u8*)data;
+	
+		srcptr+=srcarea.left()*bypp+srcarea.top()*src.stride;
+		dstptr+=area.left()*bypp+area.top()*stride;
+		for (int y=0; y<area.height(); y++)
+		{
+			if (flag & blitAlphaTest)
+			{
+  	      // no real alphatest yet
+				int width=area.width();
+				unsigned char *src=(unsigned char*)srcptr;
+				unsigned char *dst=(unsigned char*)dstptr;
+					// use duff's device here!
+				while (width--)
+				{
+					if (!*src)
+					{
+						src++;
+						dst++;
+					} else
+						*dst++=*src++;
+				}
+			} else
+				memcpy(dstptr, srcptr, area.width()*bypp);
+			srcptr+=src.stride;
+			dstptr+=stride;
+		}
+	} else if ((bpp == 32) && (src.bpp==8))
+	{
+		__u8 *srcptr=(__u8*)src.data;
+		__u8 *dstptr=(__u8*)data; // !!
+		__u32 pal[256];
+		
+		for (int i=0; i<256; ++i)
+		{
+			if (src.clut.data && (i<src.clut.colors))
+				pal[i]=(src.clut.data[i].a<<24)|(src.clut.data[i].r<<16)|(src.clut.data[i].g<<8)|(src.clut.data[i].b);
+			else
+				pal[i]=0x010101*i;
+			pal[i]^=0xFF000000;
+		}
+	
+		srcptr+=srcarea.left()*bypp+srcarea.top()*src.stride;
+		dstptr+=area.left()*bypp+area.top()*stride;
+		for (int y=0; y<area.height(); y++)
+		{
+			if (flag & blitAlphaTest)
+			{
+  	      // no real alphatest yet
+				int width=area.width();
+				unsigned char *src=(unsigned char*)srcptr;
+				__u32 *dst=(__u32*)dstptr;
+					// use duff's device here!
+				while (width--)
+				{
+					if (!*src)
+					{
+						src++;
+						dst++;
+					} else
+						*dst++=pal[*src++];
+				}
+			} else
+			{
+				int width=area.width();
+				unsigned char *src=(unsigned char*)srcptr;
+				__u32 *dst=(__u32*)dstptr;
+				while (width--)
+					*dst++=pal[*src++];
+			}
+			srcptr+=src.stride;
+			dstptr+=stride;
+		}
+	} else
+		eFatal("cannot blit %dbpp from %dbpp", bpp, src.bpp);
+}
+
+void gPixmap::mergePalette(const gPixmap &target)
+{
+	if ((!clut.colors) || (!target.clut.colors))
+		return;
+	gColor *lookup=new gColor[clut.colors];
+
+	for (int i=0; i<clut.colors; i++)
+		lookup[i].color=target.clut.findColor(clut.data[i]);
+	
+	delete clut.data;
+	clut.colors=target.clut.colors;
+	clut.data=new gRGB[clut.colors];
+	memcpy(clut.data, target.clut.data, sizeof(gRGB)*clut.colors);
+
+	__u8 *dstptr=(__u8*)data;
+
+	for (int ay=0; ay<y; ay++)
+	{
+		for (int ax=0; ax<x; ax++)
+			dstptr[ax]=lookup[dstptr[ax]];
+		dstptr+=stride;
+	}
+	
+	delete lookup;	
+}
+
+void gPixmap::line(ePoint start, ePoint dst, gColor color)
+{
+int Ax=start.x(), // dieser code rult ganz ganz doll weil er ganz ganz fast ist und auch sehr gut dokumentiert is
+Ay=start.y(), Bx=dst.x(), // t. es handelt sich immerhin um den weltbekannten bresenham algorithmus der nicht nur
+By=dst.y(); int dX, dY, fbXincr, // sehr schnell ist sondern auch sehr gut dokumentiert und getestet wurde. nicht
+fbYincr, fbXYincr, dPr, dPru, P; __u8 // nur auf dem LCD der dbox, sondern auch ueberall anders. und auch auf der
+*AfbAddr = &((__u8*)data)[Ay*stride+Ax*bypp]; __u8 // dbox mit LCD soll das teil nun tun, und ich denke das tut es. ausse
+*BfbAddr = &((__u8*)data)[By*stride+Bx*bypp]; fbXincr= // rdem hat dieser algo den vorteil dass man fehler sehr leicht fi
+bypp; if ( (dX=Bx-Ax) >= 0) goto AFTERNEGX; dX=-dX; // ndet und beheben kann. das liegt nicht zuletzt an den komment
+fbXincr=-1; AFTERNEGX: fbYincr=stride; if ( (dY=By // aren. und ausserdem, je kuerzer der code, desto weniger k
+-Ay) >= 0) goto AFTERNEGY; fbYincr=-stride; dY=-dY;AFTERNEGY: // ann daran falsch sein. erwaehnte ich schon, da
+fbXYincr = fbXincr+fbYincr; if (dY > dX) goto YisIndependent; dPr = dY+ // s dieser tolle code wahnsinnig schnell
+dY; P = -dX; dPru = P+P; dY = dX>>1; XLOOP: *AfbAddr=color; *BfbAddr=color; if ((P+=dPr) > 0) // ist? bye, tmbinc
+goto RightAndUp;  AfbAddr+=fbXincr; BfbAddr-=fbXincr; if ((dY=dY-1) > 0) goto XLOOP; *AfbAddr=color; if ((dX & 1)
+== 0) return;  *BfbAddr=color; return; RightAndUp: AfbAddr+=fbXYincr; BfbAddr-=fbXYincr; P+=dPru; if ((dY=dY-1) >
+0) goto XLOOP;  *AfbAddr=color; if ((dX & 1) == 0) return; *BfbAddr=color; return; YisIndependent: dPr = dX+dX; P
+= -dY; dPru = P+P; dX = dY>>1; YLOOP: *AfbAddr=color; *BfbAddr=color; if ((P+=dPr) > 0) goto RightAndUp2; AfbAddr
++=fbYincr;  BfbAddr-=fbYincr; if ((dX=dX-1) > 0) goto YLOOP; *AfbAddr=color; if ((dY & 1) == 0) return; *BfbAddr=
+color;return; RightAndUp2: AfbAddr+=fbXYincr; BfbAddr-=fbXYincr; P+=dPru; if ((dX=dX-1) > 0) goto YLOOP; *AfbAddr
+=color; if((dY & 1) == 0) return; *BfbAddr=color; return; // nun ist der tolle code leider zu ende. tut mir leid.
+}
+
+gColor gPalette::findColor(const gRGB &rgb) const
+{
+	int difference=1<<30, best_choice=0;
+	for (int t=0; t<colors; t++)
+	{
+		int ttd;
+		int td=(signed)(rgb.r-data[t].r); td*=td; td*=(255-data[t].a);
+		ttd=td;
+		if (ttd>=difference)
+			continue;
+		td=(signed)(rgb.g-data[t].g); td*=td; td*=(255-data[t].a);
+		ttd+=td;
+		if (ttd>=difference)
+			continue;
+		td=(signed)(rgb.b-data[t].b); td*=td; td*=(255-data[t].a);
+		ttd+=td;
+		if (ttd>=difference)
+			continue;
+		td=(signed)(rgb.a-data[t].a); td*=td; td*=255;
+		ttd+=td;
+		if (ttd>=difference)
+			continue;
+		difference=ttd;
+		best_choice=t;
+	}
+	return best_choice;
+}
+
+gPixmap::gPixmap()
+{
+}
+
+gPixmap::~gPixmap()
+{
+}
+
+gImage::gImage(eSize size, int _bpp)
+{
+	x=size.width();
+	y=size.height();
+	bpp=_bpp;
+	switch (bpp)
+	{
+	case 8:
+		bypp=1;
+		break;
+	case 15:
+	case 16:
+		bypp=2;
+		break;
+	case 24:		// never use 24bit mode
+	case 32:
+		bypp=4;
+		break;
+	default:
+		bypp=(bpp+7)/8;
+	}
+	stride=x*bypp;
+	if (bpp==8)
+	{
+		clut.colors=256;
+		clut.data=new gRGB[clut.colors];
+	} else
+	{
+		clut.colors=0;
+		clut.data=0;
+	}
+	data=new char[x*y*bypp];
+}
+
+gImage::~gImage()
+{
+	delete[] clut.data;
+	delete[] (char*)data;
+}
-- 
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