Gfxlib cleanup: move stretch_frame() out of SDL domain and rename to RescaleFrame()

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3470 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/libs/gfxlib.h

@@ -352,6 +352,8 @@ extern FRAME SetEquFrameIndex (FRAME DstFrame, FRAME SrcFrame);
 extern FRAME IncFrameIndex (FRAME Frame);
 extern FRAME DecFrameIndex (FRAME Frame);
 extern DRAWABLE RotateFrame (FRAME Frame, int angle_deg);
+extern DRAWABLE RescaleFrame (FRAME, int width, int height);
+
 extern void SetFrameTransparentColor (FRAME, Color);
 
 // If the frame is an active SCREEN_DRAWABLE, this call must be

sc2/src/libs/graphics/drawable.c

@@ -296,3 +296,45 @@ GetFramePixel (FRAME frame, POINT pixelPt)
 			pixelPt.x, pixelPt.y);
 }
 
+// Creates a new DRAWABLE of specified size and scales the passed
+// frame onto it. The aspect ratio is not preserved.
+DRAWABLE
+RescaleFrame (FRAME frame, int width, int height)
+{
+	DRAWABLE drawable;
+	FRAME newFrame;
+	CREATE_FLAGS flags;
+	TFB_Image *img;
+	TFB_Canvas src, dst;
+
+	if (!frame)
+		return NULL;
+
+	flags = GetFrameParentDrawable (frame)->Flags;
+	drawable = CreateDrawable (flags, width, height, 1);
+	if (!drawable)
+		return NULL;
+	newFrame = CaptureDrawable (drawable);
+	if (!newFrame)
+	{
+		FreeDrawable (drawable);
+		return NULL;
+	}
+
+	// scale the hot-spot
+	newFrame->HotSpot.x = frame->HotSpot.x * width / frame->Bounds.width;
+	newFrame->HotSpot.y = frame->HotSpot.y * height / frame->Bounds.height;
+
+	img = frame->image;
+	LockMutex (img->mutex);
+	
+	src = img->NormalImg;
+	dst = newFrame->image->NormalImg;
+	TFB_DrawCanvas_Rescale_Nearest (src, dst, -1, NULL, NULL, NULL);
+	
+	UnlockMutex (img->mutex);
+
+	ReleaseDrawable (newFrame);
+
+	return drawable;
+}

sc2/src/libs/graphics/sdl/3do_getbody.c

@@ -25,31 +25,6 @@
 #include "primitives.h"
 
 
-// stretch_frame
-// create a new frame of size neww x newh, and blit a scaled version FramePtr
-// into it.
-// destroy the old frame if 'destroy' is 1
-FRAME stretch_frame (FRAME FramePtr, int neww, int newh, int destroy)
-{
-	FRAME NewFrame;
-	CREATE_FLAGS flags;
-	TFB_Image *tfbImg;
-	TFB_Canvas src, dst;
-
-	flags = GetFrameParentDrawable (FramePtr)->Flags;
-	NewFrame = CaptureDrawable (
-				CreateDrawable (flags, (SIZE)neww, (SIZE)newh, 1));
-	tfbImg = FramePtr->image;
-	LockMutex (tfbImg->mutex);
-	src = tfbImg->NormalImg;
-	dst = NewFrame->image->NormalImg;
-	TFB_DrawCanvas_Rescale_Nearest (src, dst, -1, NULL, NULL, NULL);
-	UnlockMutex (tfbImg->mutex);
-	if (destroy)
-		DestroyDrawable (ReleaseDrawable (FramePtr));
-	return (NewFrame);
-}
-
 void process_rgb_bmp (FRAME FramePtr, Uint32 *rgba, int maxx, int maxy)
 {
 	int x, y;

sc2/src/uqm/planets/plangen.c

@@ -42,7 +42,6 @@
 extern DWORD frame_mapRGBA (FRAME FramePtr, UBYTE r, UBYTE g,
 		UBYTE b, UBYTE a);
 extern void process_rgb_bmp (FRAME FramePtr, DWORD *rgba, int maxx, int maxy);
-extern FRAME stretch_frame (FRAME FramePtr, int neww, int newh, int destroy);
 extern void fill_frame_rgb (FRAME FramePtr, DWORD color, int x0, int y0,
 		int x, int y);
 extern void arith_frame_blit (FRAME srcFrame, const RECT *rsrc,
@@ -1752,8 +1751,8 @@ GeneratePlanetSurface (PLANET_DESC *pPlanetDesc, FRAME SurfDefFrame)
 		if (GetFrameWidth (SurfDefFrame) != MAP_WIDTH
 				|| GetFrameHeight (SurfDefFrame) != MAP_HEIGHT)
 		{
-			pSolarSysState->TopoFrame = stretch_frame (SurfDefFrame,
-				MAP_WIDTH, MAP_HEIGHT, 0);
+			pSolarSysState->TopoFrame = CaptureDrawable (RescaleFrame (
+					SurfDefFrame, MAP_WIDTH, MAP_HEIGHT));
 			// will not need the passed FRAME anymore
 			DeleteDef = TRUE;
 		}
@@ -1769,8 +1768,8 @@ GeneratePlanetSurface (PLANET_DESC *pPlanetDesc, FRAME SurfDefFrame)
 			if (GetFrameWidth (ElevFrame) != MAP_WIDTH
 					|| GetFrameHeight (ElevFrame) != MAP_HEIGHT)
 			{
-				ElevFrame = stretch_frame (ElevFrame, MAP_WIDTH,
-						MAP_HEIGHT, 0);
+				ElevFrame = CaptureDrawable (RescaleFrame (ElevFrame,
+						MAP_WIDTH, MAP_HEIGHT));
 			}
 
 			// grab the elevation data in 1 byte per pixel format