Move native bitmap creation/caching routine into bitmap.c

svn path=/trunk/netsurf/; revision=6619

1 files changed, 106 insertions, 1 deletions

diff --git a/amiga/bitmap.c b/amiga/bitmap.c
index 271f4af1b..47c2b424a 100644
--- a/amiga/bitmap.c
+++ b/amiga/bitmap.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2008 Chris Young <chris@unsatisfactorysoftware.co.uk>
+ * Copyright 2008,2009 Chris Young <chris@unsatisfactorysoftware.co.uk>
  *
  * This file is part of NetSurf, http://www.netsurf-browser.org/
  *
@@ -21,6 +21,8 @@
 #include "amiga/bitmap.h"
 #include <proto/exec.h>
 #include <proto/picasso96api.h>
+#include <graphics/composite.h>
+#include "amiga/options.h"
 
 /**
  * Create a bitmap.
@@ -243,3 +245,106 @@ size_t bitmap_get_bpp(void *vbitmap)
 	assert(bitmap);
 	return 4;
 }
+
+struct BitMap *ami_getcachenativebm(struct bitmap *bitmap,int width,int height,struct BitMap *friendbm)
+{
+	struct RenderInfo ri;
+	struct BitMap *tbm = NULL;
+	struct RastPort trp;
+
+	if(bitmap->nativebm)
+	{
+		if((bitmap->nativebmwidth == width) && (bitmap->nativebmheight==height))
+		{
+			tbm = bitmap->nativebm;
+			return tbm;
+		}
+		else if((bitmap->nativebmwidth == bitmap->width) && (bitmap->nativebmheight==bitmap->height))
+		{
+			tbm = bitmap->nativebm;
+		}
+		else
+		{
+			if(bitmap->nativebm) p96FreeBitMap(bitmap->nativebm);
+			bitmap->nativebm = NULL;
+		}
+	}
+
+	if(!tbm)
+	{
+		ri.Memory = bitmap->pixdata;
+		ri.BytesPerRow = bitmap->width * 4;
+		ri.RGBFormat = RGBFB_R8G8B8A8;
+
+		tbm = p96AllocBitMap(bitmap->width,bitmap->height,32,0,friendbm,RGBFB_R8G8B8A8);
+		InitRastPort(&trp);
+		trp.BitMap = tbm;
+		p96WritePixelArray((struct RenderInfo *)&ri,0,0,&trp,0,0,bitmap->width,bitmap->height);
+
+		if(option_cache_bitmaps == 2)
+		{
+			bitmap->nativebm = tbm;
+			bitmap->nativebmwidth = bitmap->width;
+			bitmap->nativebmheight = bitmap->height;
+		}
+	}
+
+	if((bitmap->width != width) || (bitmap->height != height))
+	{
+		struct BitMap *scaledbm;
+		struct BitScaleArgs bsa;
+
+		scaledbm = p96AllocBitMap(width,height,32,BMF_DISPLAYABLE,friendbm,RGBFB_R8G8B8A8);
+
+		if(GfxBase->lib_Version >= 53) // AutoDoc says v52, but this function isn't in OS4.0, so checking for v53 (OS4.1)
+		{
+			CompositeTags(COMPOSITE_Src,tbm,scaledbm,
+						COMPTAG_ScaleX,COMP_FLOAT_TO_FIX(width/bitmap->width),
+						COMPTAG_ScaleY,COMP_FLOAT_TO_FIX(height/bitmap->height),
+						COMPTAG_Flags,COMPFLAG_IgnoreDestAlpha,
+						COMPTAG_DestX,0,
+						COMPTAG_DestY,0,
+						COMPTAG_DestWidth,width,
+						COMPTAG_DestHeight,height,
+						COMPTAG_OffsetX,0,
+						COMPTAG_OffsetY,0,
+						COMPTAG_FriendBitMap,friendbm,
+						TAG_DONE);
+		}
+		else /* do it the old-fashioned way.  This is pretty slow, but probably
+		uses Composite() on OS4.1 anyway, so we're only saving a blit really. */
+		{
+			bsa.bsa_SrcX = 0;
+			bsa.bsa_SrcY = 0;
+			bsa.bsa_SrcWidth = bitmap->width;
+			bsa.bsa_SrcHeight = bitmap->height;
+			bsa.bsa_DestX = 0;
+			bsa.bsa_DestY = 0;
+//			bsa.bsa_DestWidth = width;
+//			bsa.bsa_DestHeight = height;
+			bsa.bsa_XSrcFactor = bitmap->width;
+			bsa.bsa_XDestFactor = width;
+			bsa.bsa_YSrcFactor = bitmap->height;
+			bsa.bsa_YDestFactor = height;
+			bsa.bsa_SrcBitMap = tbm;
+			bsa.bsa_DestBitMap = scaledbm;
+			bsa.bsa_Flags = 0;
+
+			BitMapScale(&bsa);
+		}
+
+		if(bitmap->nativebm != tbm) p96FreeBitMap(bitmap->nativebm);
+		p96FreeBitMap(tbm);
+		tbm = scaledbm;
+		bitmap->nativebm = NULL;
+
+		if(option_cache_bitmaps >= 1)
+		{
+			bitmap->nativebm = tbm;
+			bitmap->nativebmwidth = width;
+			bitmap->nativebmheight = height;
+		}
+	}
+
+	return tbm;
+}