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engines/mutationofjb/util.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef MUTATIONOFJB_UTIL_H
+#define MUTATIONOFJB_UTIL_H
+
+#include "common/rect.h"
+
+#include "graphics/managed_surface.h"
+#include "graphics/surface.h"
+
+namespace Common {
+class String;
+}
+
+namespace MutationOfJB {
+
+void reportFileMissingError(const char *fileName);
+Common::String toUpperCP895(const Common::String &str);
+
+// Taken from ManagedSurface::clip.
+template<typename SurfaceType>
+bool clipBounds(Common::Rect &srcBounds, Common::Rect &destBounds, SurfaceType &destSurf) {
+	if (destBounds.left >= destSurf.w || destBounds.top >= destSurf.h ||
+			destBounds.right <= 0 || destBounds.bottom <= 0)
+		return false;
+
+	// Clip the bounds if source is too big to fit into destination.
+	if (destBounds.right > destSurf.w) {
+		srcBounds.right -= destBounds.right - destSurf.w;
+		destBounds.right = destSurf.w;
+	}
+
+	if (destBounds.bottom > destSurf.h) {
+		srcBounds.bottom -= destBounds.bottom - destSurf.h;
+		destBounds.bottom = destSurf.h;
+	}
+
+	if (destBounds.top < 0) {
+		srcBounds.top += -destBounds.top;
+		destBounds.top = 0;
+	}
+
+	if (destBounds.left < 0) {
+		srcBounds.left += -destBounds.left;
+		destBounds.left = 0;
+	}
+
+	return true;
+}
+
+template<typename BlitOp>
+void blit_if(const Graphics::Surface &src, const Common::Rect &srcRect, Graphics::Surface &dest, const Common::Point &destPos, BlitOp blitOp) {
+	Common::Rect srcBounds = srcRect;
+	Common::Rect destBounds(destPos.x, destPos.y, destPos.x + srcRect.width(), destPos.y + srcRect.height());
+
+	assert(srcRect.isValidRect());
+	assert(dest.format == src.format);
+
+	if (!clipBounds(srcBounds, destBounds, dest))
+		return;
+
+	for (int y = 0; y < srcBounds.height(); ++y) {
+		const byte *srcP = reinterpret_cast<const byte *>(src.getBasePtr(srcBounds.left, srcBounds.top + y));
+		const byte *srcEndP = srcP + srcBounds.width();
+		byte *destP = reinterpret_cast<byte *>(dest.getBasePtr(destBounds.left, destBounds.top + y));
+
+		while (srcP != srcEndP) {
+			const byte newColor = blitOp(*srcP, *destP);
+			if (*destP != newColor) {
+				*destP = newColor;
+			}
+			++srcP;
+			++destP;
+		}
+	}
+}
+
+template<typename BlitOp>
+void blit_if(const Graphics::Surface &src, const Common::Rect &srcRect, Graphics::ManagedSurface &dest, const Common::Point &destPos, BlitOp blitOp) {
+	Common::Rect srcBounds = srcRect;
+	Common::Rect destBounds(destPos.x, destPos.y, destPos.x + srcRect.width(), destPos.y + srcRect.height());
+
+	assert(srcRect.isValidRect());
+	assert(dest.format == src.format);
+
+	if (!clipBounds(srcBounds, destBounds, dest))
+		return;
+
+	Graphics::Surface destSurf = dest.getSubArea(destBounds); // This will invalidate the rectangle.
+	blit_if(src, srcRect, destSurf, Common::Point(0, 0), blitOp);
+}
+
+template<typename BlitOp>
+void blit_if(const Graphics::Surface &src, Graphics::Surface &dest, const Common::Point &destPos, BlitOp blitOp) {
+	blit_if(src, Common::Rect(0, 0, src.w, src.h), dest, destPos, blitOp);
+}
+
+template<typename BlitOp>
+void blit_if(const Graphics::Surface &src, Graphics::ManagedSurface &dest, const Common::Point &destPos, BlitOp blitOp) {
+	blit_if(src, Common::Rect(0, 0, src.w, src.h), dest, destPos, blitOp);
+}
+
+}
+
+#endif