2 files changed, 31 insertions, 0 deletions

diff --git a/graphics/surface.cpp b/graphics/surface.cpp
index 929157203e..d808121c87 100644
--- a/graphics/surface.cpp
+++ b/graphics/surface.cpp
@@ -133,6 +133,24 @@ const Surface Surface::getSubArea(const Common::Rect &area) const {
 	return subSurface;
 }
 
+void Surface::copyRectToSurface(const void *buffer, int pitch, int x, int y, int width, int height) {
+	assert(buffer);
+
+	assert(x >= 0 && x < w);
+	assert(y >= 0 && y < h);
+	assert(height > 0 && y + height <= h);
+	assert(width > 0 && x + width <= w);
+
+	// Copy buffer data to internal buffer
+	const byte *src = (const byte *)buffer;
+	byte *dst = (byte *)getBasePtr(x, y);
+	for (int i = 0; i < height; i++) {
+		memcpy(dst, src, width * format.bytesPerPixel);
+		src += pitch;
+		dst += this->pitch;
+	}
+}
+
 void Surface::hLine(int x, int y, int x2, uint32 color) {
 	// Clipping
 	if (y < 0 || y >= h)
diff --git a/graphics/surface.h b/graphics/surface.h
index b08d4a5cb7..ad52ed8238 100644
--- a/graphics/surface.h
+++ b/graphics/surface.h
@@ -209,6 +209,19 @@ public:
 	const Surface getSubArea(const Common::Rect &area) const;
 
 	/**
+	 * Copies a bitmap to the Surface internal buffer. The pixel format
+	 * of buffer must match the pixel format of the Surface.
+	 *
+	 * @param buffer    The buffer containing the graphics data source
+	 * @param pitch     The pitch of the buffer (number of bytes in a scanline)
+	 * @param x         The x coordinate of the destination rectangle
+	 * @param y         The y coordinate of the destination rectangle
+	 * @param width     The width of the destination rectangle
+	 * @param height    The height of the destination rectangle
+	 */
+	void copyRectToSurface(const void *buffer, int pitch, int x, int y, int width, int height);
+
+	/**
 	 * Convert the data to another pixel format.
 	 *
 	 * This works in-place. This means it will not create an additional buffer