GRAPHICS: Add interface for horizontal shake

5 files changed, 20 insertions, 14 deletions

diff --git a/backends/platform/iphone/iphone_common.h b/backends/platform/iphone/iphone_common.h
index 59dca84b85..a09ddd462c 100644
--- a/backends/platform/iphone/iphone_common.h
+++ b/backends/platform/iphone/iphone_common.h
@@ -61,7 +61,8 @@ struct VideoContext {
 	VideoContext() : asprectRatioCorrection(), screenWidth(), screenHeight(), overlayVisible(false),
 	                 overlayWidth(), overlayHeight(), mouseX(), mouseY(),
 	                 mouseHotspotX(), mouseHotspotY(), mouseWidth(), mouseHeight(),
-	                 mouseIsVisible(), graphicsMode(kGraphicsModeLinear), shakeOffsetY() {
+	                 mouseIsVisible(), graphicsMode(kGraphicsModeLinear),
+	                 shakeXOffset(), shakeYOffset() {
 	}
 
 	// Game screen state
@@ -83,7 +84,8 @@ struct VideoContext {
 
 	// Misc state
 	GraphicsModes graphicsMode;
-	int shakeOffsetY;
+	int shakeXOffset;
+	int shakeYOffset;
 };
 
 struct InternalEvent {
diff --git a/backends/platform/iphone/iphone_video.h b/backends/platform/iphone/iphone_video.h
index 26c32183ce..8cba07c409 100644
--- a/backends/platform/iphone/iphone_video.h
+++ b/backends/platform/iphone/iphone_video.h
@@ -69,7 +69,8 @@
 	GLint _mouseWidth, _mouseHeight;
 	GLfloat _mouseScaleX, _mouseScaleY;
 
-	int _scaledShakeOffsetY;
+	int _scaledShakeXOffset;
+	int _scaledShakeYOffset;
 	CGFloat _contentScaleFactor;
 
 	UITouch *_firstTouch;
diff --git a/backends/platform/iphone/iphone_video.mm b/backends/platform/iphone/iphone_video.mm
index 9e521de179..1866bf5f96 100644
--- a/backends/platform/iphone/iphone_video.mm
+++ b/backends/platform/iphone/iphone_video.mm
@@ -191,7 +191,8 @@ const char *iPhone_getDocumentsDir() {
 	_overlayTexture = 0;
 	_mouseCursorTexture = 0;
 
-	_scaledShakeOffsetY = 0;
+	_scaledShakeXOffset = 0;
+	_scaledShakeYOffset = 0;
 
 	_firstTouch = NULL;
 	_secondTouch = NULL;
@@ -567,10 +568,10 @@ const char *iPhone_getDocumentsDir() {
 
 	// Scale the shake offset according to the overlay size. We need this to
 	// adjust the overlay mouse click coordinates when an offset is set.
-	_scaledShakeOffsetY = (int)(_videoContext.shakeOffsetY / (GLfloat)_videoContext.screenHeight * CGRectGetHeight(_overlayRect));
+	_scaledShakeYOffset = (int)(_videoContext.shakeYOffset / (GLfloat)_videoContext.screenHeight * CGRectGetHeight(_overlayRect));
 
-	// Apply the shakeing to the output screen.
-	glTranslatef(0, -_scaledShakeOffsetY, 0);
+	// Apply the shaking to the output screen.
+	glTranslatef(0, -_scaledShakeYOffset, 0);
 }
 
 - (void)clearColorBuffer {
@@ -641,12 +642,12 @@ const char *iPhone_getDocumentsDir() {
 		area = &_overlayRect;
 		width = _videoContext.overlayWidth;
 		height = _videoContext.overlayHeight;
-		offsetY = _scaledShakeOffsetY;
+		offsetY = _scaledShakeYOffset;
 	} else {
 		area = &_gameScreenRect;
 		width = _videoContext.screenWidth;
 		height = _videoContext.screenHeight;
-		offsetY = _videoContext.shakeOffsetY;
+		offsetY = _videoContext.shakeYOffset;
 	}
 
 	point.x = (point.x - CGRectGetMinX(*area)) / CGRectGetWidth(*area);
diff --git a/backends/platform/iphone/osys_main.h b/backends/platform/iphone/osys_main.h
index 6aa77e291d..427d8063e4 100644
--- a/backends/platform/iphone/osys_main.h
+++ b/backends/platform/iphone/osys_main.h
@@ -147,7 +147,7 @@ public:
 	virtual void updateScreen();
 	virtual Graphics::Surface *lockScreen();
 	virtual void unlockScreen();
-	virtual void setShakePos(int shakeOffset);
+	virtual void setShakePos(int shakeXOffset, int shakeYOffset);
 
 	virtual void showOverlay();
 	virtual void hideOverlay();
diff --git a/backends/platform/iphone/osys_video.mm b/backends/platform/iphone/osys_video.mm
index f07160d350..a5dca7ffb7 100644
--- a/backends/platform/iphone/osys_video.mm
+++ b/backends/platform/iphone/osys_video.mm
@@ -72,7 +72,8 @@ void OSystem_IPHONE::initSize(uint width, uint height, const Graphics::PixelForm
 
 	_videoContext->screenWidth = width;
 	_videoContext->screenHeight = height;
-	_videoContext->shakeOffsetY = 0;
+	_videoContext->shakeXOffset = 0;
+	_videoContext->shakeYOffset = 0;
 
 	// In case we use the screen texture as frame buffer we reset the pixels
 	// pointer here to avoid freeing the screen texture.
@@ -282,9 +283,10 @@ void OSystem_IPHONE::unlockScreen() {
 	dirtyFullScreen();
 }
 
-void OSystem_IPHONE::setShakePos(int shakeOffset) {
-	//printf("setShakePos(%i)\n", shakeOffset);
-	_videoContext->shakeOffsetY = shakeOffset;
+void OSystem_IPHONE::setShakePos(int shakeXOffset, int shakeYOffset) {
+	//printf("setShakePos(%i, %i)\n", shakeXOffset, shakeYOffset);
+	_videoContext->shakeXOffset = shakeXOffset;
+	_videoContext->shakeYOffset = shakeYOffset;
 	[g_iPhoneViewInstance performSelectorOnMainThread:@selector(setViewTransformation) withObject:nil waitUntilDone: YES];
 	// HACK: We use this to force a redraw.
 	_mouseDirty = true;