M4: Move 'determine transparent color' hack into a new M4Sprite method

svn-id: r46281

5 files changed, 11 insertions, 11 deletions

diff --git a/engines/m4/animation.cpp b/engines/m4/animation.cpp
index 53d00cb5c0..836334a305 100644
--- a/engines/m4/animation.cpp
+++ b/engines/m4/animation.cpp
@@ -175,11 +175,8 @@ bool Animation::updateAnim() {
 		// Write the sprite onto the screen
 		M4Sprite *spr = _spriteSeries->getFrame(seriesFrameIndex);
 
-		// FIXME: We assume that the transparent color is the color of the top left pixel
-		byte *transparentColor = spr->getBasePtr(0, 0);
-
 		// FIXME: correct x, y
-		spr->copyTo(bg, frame->x, frame->y, (int)*transparentColor);
+		spr->copyTo(bg, frame->x, frame->y, (int)spr->getTransparentColor());
 
 		// HACK: wait a bit
 		g_system->delayMillis(100);
diff --git a/engines/m4/console.cpp b/engines/m4/console.cpp
index c95108066c..9744741a52 100644
--- a/engines/m4/console.cpp
+++ b/engines/m4/console.cpp
@@ -223,10 +223,7 @@ bool Console::cmdShowSprite(int argc, const char **argv) {
 			if (y >= bg->height())
 				break;
 
-			// FIXME: We assume that the transparent color is the color of the top left pixel
-			byte *transparentColor = spr->getBasePtr(0, 0);
-
-			spr->copyTo(bg, x, y, (int)*transparentColor);
+			spr->copyTo(bg, x, y, (int)spr->getTransparentColor());
 
 			x += spr->width();
 			yMax = MAX(yMax, spr->height());
diff --git a/engines/m4/mads_menus.cpp b/engines/m4/mads_menus.cpp
index 01bfe96e25..d20e04c2e4 100644
--- a/engines/m4/mads_menus.cpp
+++ b/engines/m4/mads_menus.cpp
@@ -528,9 +528,7 @@ void DragonMainMenuView::updateState() {
 	_itemPalData.push_back(palData);
 
 	spr = _menuItem->getFrame(1);
-	// FIXME: We assume that the transparent color is the color of the top left pixel
-	byte *transparentColor = spr->getBasePtr(0, 0);
-	spr->copyTo(this, spr->xOffset - 140, spr->yOffset - spr->height(), (int)*transparentColor);
+	spr->copyTo(this, spr->xOffset - 140, spr->yOffset - spr->height(), (int)spr->getTransparentColor());
 
 	_vm->_mouse->cursorOn();
 }
diff --git a/engines/m4/sprite.cpp b/engines/m4/sprite.cpp
index d3299ff699..d8d21bc34d 100644
--- a/engines/m4/sprite.cpp
+++ b/engines/m4/sprite.cpp
@@ -171,4 +171,10 @@ void M4Sprite::loadMadsSprite(Common::SeekableReadStream* source) {
 	}
 }
 
+byte M4Sprite::getTransparentColor() const {
+	// FIXME: We assume that the transparent color is the color of the
+	// top left pixel.
+	return *getBasePtr(0, 0);
+}
+
 } // End of namespace M4
diff --git a/engines/m4/sprite.h b/engines/m4/sprite.h
index 5caeaa8664..fbdd64bd29 100644
--- a/engines/m4/sprite.h
+++ b/engines/m4/sprite.h
@@ -114,6 +114,8 @@ public:
 	void loadRle(Common::SeekableReadStream* rleData);
 	void loadDeltaRle(Common::SeekableReadStream* rleData, int destX, int destY);
 	void loadMadsSprite(Common::SeekableReadStream* source);
+
+	byte getTransparentColor() const;
 protected:
 };