From b8390fa161c0c324af0e52a4f3a740cca9e9a479 Mon Sep 17 00:00:00 2001
From: sluicebox
Date: Fri, 15 Nov 2019 01:38:21 -0800
Subject: GRAPHICS: Add interface for horizontal shake

---
 backends/platform/ios7/ios7_common.h      |  6 ++++--
 backends/platform/ios7/ios7_osys_main.h   |  2 +-
 backends/platform/ios7/ios7_osys_video.mm | 10 ++++++----
 backends/platform/ios7/ios7_video.h       |  3 ++-
 backends/platform/ios7/ios7_video.mm      | 11 ++++++-----
 5 files changed, 19 insertions(+), 13 deletions(-)

(limited to 'backends/platform/ios7')

diff --git a/backends/platform/ios7/ios7_common.h b/backends/platform/ios7/ios7_common.h
index aa5134335e..dd1e85a884 100644
--- a/backends/platform/ios7/ios7_common.h
+++ b/backends/platform/ios7/ios7_common.h
@@ -80,7 +80,8 @@ struct VideoContext {
 	VideoContext() : asprectRatioCorrection(), screenWidth(), screenHeight(), overlayVisible(false),
 	                 overlayWidth(), overlayHeight(), mouseX(), mouseY(),
 	                 mouseHotspotX(), mouseHotspotY(), mouseWidth(), mouseHeight(),
-	                 mouseIsVisible(), graphicsMode(kGraphicsModeNone), filtering(false), shakeOffsetY() {
+	                 mouseIsVisible(), graphicsMode(kGraphicsModeNone), filtering(false),
+	                 shakeXOffset(), shakeYOffset() {
 	}
 
 	// Game screen state
@@ -103,7 +104,8 @@ struct VideoContext {
 	// Misc state
 	GraphicsModes graphicsMode;
 	bool filtering;
-	int shakeOffsetY;
+	int shakeXOffset;
+	int shakeYOffset;
 };
 
 struct InternalEvent {
diff --git a/backends/platform/ios7/ios7_osys_main.h b/backends/platform/ios7/ios7_osys_main.h
index 994a67dddb..f70e48e7de 100644
--- a/backends/platform/ios7/ios7_osys_main.h
+++ b/backends/platform/ios7/ios7_osys_main.h
@@ -161,7 +161,7 @@ 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/ios7/ios7_osys_video.mm b/backends/platform/ios7/ios7_osys_video.mm
index 20cf687709..d31ca10ea3 100644
--- a/backends/platform/ios7/ios7_osys_video.mm
+++ b/backends/platform/ios7/ios7_osys_video.mm
@@ -138,7 +138,8 @@ void OSystem_iOS7::initSize(uint width, uint height, const Graphics::PixelFormat
 
 	_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.
@@ -354,9 +355,10 @@ void OSystem_iOS7::unlockScreen() {
 	dirtyFullScreen();
 }
 
-void OSystem_iOS7::setShakePos(int shakeOffset) {
-	//printf("setShakePos(%i)\n", shakeOffset);
-	_videoContext->shakeOffsetY = shakeOffset;
+void OSystem_iOS7::setShakePos(int shakeXOffset, int shakeYOffset) {
+	//printf("setShakePos(%i, %i)\n", shakeXOffset, shakeYOffset);
+	_videoContext->shakeXOffset = shakeXOffset;
+	_videoContext->shakeYOffset = shakeYOffset;
 	execute_on_main_thread(^ {
 		[[iOS7AppDelegate iPhoneView] setViewTransformation];
 	});
diff --git a/backends/platform/ios7/ios7_video.h b/backends/platform/ios7/ios7_video.h
index a26213f28e..030d81cd9f 100644
--- a/backends/platform/ios7/ios7_video.h
+++ b/backends/platform/ios7/ios7_video.h
@@ -84,7 +84,8 @@ typedef struct {
 	GLint _mouseWidth, _mouseHeight;
 	GLfloat _mouseScaleX, _mouseScaleY;
 
-	int _scaledShakeOffsetY;
+	int _scaledShakeXOffset;
+	int _scaledShakeYOffset;
 
 	UITouch *_firstTouch;
 	UITouch *_secondTouch;
diff --git a/backends/platform/ios7/ios7_video.mm b/backends/platform/ios7/ios7_video.mm
index 321ccdb63d..914dc6ded1 100644
--- a/backends/platform/ios7/ios7_video.mm
+++ b/backends/platform/ios7/ios7_video.mm
@@ -454,7 +454,8 @@ uint getSizeNextPOT(uint size) {
 	_overlayTexture = 0;
 	_mouseCursorTexture = 0;
 
-	_scaledShakeOffsetY = 0;
+	_scaledShakeXOffset = 0;
+	_scaledShakeYOffset = 0;
 
 	_firstTouch = NULL;
 	_secondTouch = NULL;
@@ -868,9 +869,9 @@ uint getSizeNextPOT(uint size) {
 - (void)setViewTransformation {
 	// 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));
 
-	glUniform1f(_shakeSlot, _scaledShakeOffsetY);
+	glUniform1f(_shakeSlot, _scaledShakeYOffset);
 }
 
 - (void)clearColorBuffer {
@@ -914,12 +915,12 @@ uint getSizeNextPOT(uint size) {
 		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);
-- 
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