All Implemented Interfaces:

android.graphics.drawable.Drawable.Callback , android.opengl.GLSurfaceView.Renderer , android.view.KeyEvent.Callback , android.view.SurfaceHolder.Callback , android.view.SurfaceHolder.Callback2 , android.view.accessibility.AccessibilityEventSource , com.otaliastudios.zoom.ZoomApi
```
@RequiresApi(value = 18) 
public class ZoomSurfaceView
extends GLSurfaceView implements ZoomApi, GLSurfaceView.Renderer
                    
```
Uses ZoomEngine to allow zooming and pan events onto a GL rendered surface.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public interface`	`ZoomSurfaceView.Callback`	A Callback to be notified of the surface lifecycle. All methods are invoked on the ui thread for convenience.
`public class`	`ZoomSurfaceView.Companion`

Field Summary

Fields
Modifier and Type	Field	Description
`private Surface`	`surface`
`private SurfaceTexture`	`surfaceTexture`
`private final ZoomEngine`	`engine`
`private final Float`	`zoom`
`private final Float`	`realZoom`
`private final AbsolutePoint`	`pan`
`private final Float`	`panX`
`private final Float`	`panY`
`private final ScaledPoint`	`scaledPan`
`private final Float`	`scaledPanX`
`private final Float`	`scaledPanY`

Constructor Summary

Constructors
Constructor	Description
`ZoomSurfaceView(Context context, AttributeSet attrs)`
`ZoomSurfaceView(Context context)`

Method Summary

Modifier and Type	Method	Description
`final Surface`	`getSurface()`	A Surface that can be consumed by some buffer provider.
`final Unit`	`setSurface(Surface surface)`
`final SurfaceTexture`	`getSurfaceTexture()`	A SurfaceTexture that can be consumed by some buffer provider.
`final Unit`	`setSurfaceTexture(SurfaceTexture surfaceTexture)`
`final ZoomEngine`	`getEngine()`
`Float`	`getZoom()`	Gets the current zoom value, which can be used as a reference when calling ZoomApi.zoomTo or ZoomApi.zoomBy.
`Float`	`getRealZoom()`	Gets the current zoom value, including the base zoom that was eventually applied when initializing to respect the "center inside" policy.
`AbsolutePoint`	`getPan()`	The current pan as an AbsolutePoint.
`Float`	`getPanX()`	Returns the current horizontal pan value, in content absolute coordinates (that is, as if there was no zoom at all).
`Float`	`getPanY()`	Returns the current vertical pan value, in content absolute coordinates (that is, as if there was no zoom at all).
`ScaledPoint`	`getScaledPan()`	The current pan as a ScaledPoint, that is, taking into account the current zoom.
`Float`	`getScaledPanX()`	Returns the current horizontal pan value, in content scaled coordinates (that is, including the current zoom).
`Float`	`getScaledPanY()`	Returns the current vertical pan value, in content scaled coordinates (that is, including the current zoom).
`final Unit`	`addCallback(ZoomSurfaceView.Callback callback)`	Adds a new Callback to be notified of the surface state.
`final Unit`	`removeCallback(ZoomSurfaceView.Callback callback)`	Removes a Callback previously added with addCallback.
`Unit`	`setBackgroundColor(Integer color)`	If non transparent, we will draw this background color using GL before drawing the actual texture.
`final Unit`	`setContentSize(Float width, Float height)`	Sets the size of the content.
`Boolean`	`onTouchEvent(MotionEvent ev)`
`Unit`	`onSurfaceCreated(GL10 gl, EGLConfig config)`
`Unit`	`onSurfaceChanged(GL10 gl, Integer width, Integer height)`
`Unit`	`onDrawFrame(GL10 gl)`	Performs the texture and background drawing.

Methods inherited from class android.view.SurfaceView
addChildrenForAccessibility, addExtraDataToAccessibilityNodeInfo, addFocusables, addFocusables, addKeyboardNavigationClusters, addOnAttachStateChangeListener, addOnLayoutChangeListener, addOnUnhandledKeyEventListener, addTouchables, animate, announceForAccessibility, autofill, autofill, awakenScrollBars, awakenScrollBars, awakenScrollBars, bringToFront, buildDrawingCache, buildDrawingCache, buildLayer, callOnClick, canResolveLayoutDirection, canResolveTextAlignment, canResolveTextDirection, canScrollHorizontally, canScrollVertically, cancelDragAndDrop, cancelLongPress, cancelPendingInputEvents, checkInputConnectionProxy, clearAnimation, clearFocus, clearViewTranslationCallback, computeHorizontalScrollExtent, computeHorizontalScrollOffset, computeHorizontalScrollRange, computeScroll, computeSystemWindowInsets, computeVerticalScrollExtent, computeVerticalScrollOffset, computeVerticalScrollRange, createAccessibilityNodeInfo, createContextMenu, destroyDrawingCache, dispatchApplyWindowInsets, dispatchCapturedPointerEvent, dispatchConfigurationChanged, dispatchCreateViewTranslationRequest, dispatchDisplayHint, dispatchDragEvent, dispatchDrawableHotspotChanged, dispatchFinishTemporaryDetach, dispatchGenericFocusedEvent, dispatchGenericMotionEvent, dispatchGenericPointerEvent, dispatchHoverEvent, dispatchKeyEvent, dispatchKeyEventPreIme, dispatchKeyShortcutEvent, dispatchNestedFling, dispatchNestedPreFling, dispatchNestedPrePerformAccessibilityAction, dispatchNestedPreScroll, dispatchNestedScroll, dispatchPointerCaptureChanged, dispatchPopulateAccessibilityEvent, dispatchProvideAutofillStructure, dispatchProvideStructure, dispatchRestoreInstanceState, dispatchSaveInstanceState, dispatchScrollCaptureSearch, dispatchSetActivated, dispatchSetPressed, dispatchSetSelected, dispatchStartTemporaryDetach, dispatchSystemUiVisibilityChanged, dispatchTouchEvent, dispatchTrackballEvent, dispatchUnhandledMove, dispatchVisibilityChanged, dispatchWindowFocusChanged, dispatchWindowInsetsAnimationEnd, dispatchWindowInsetsAnimationPrepare, dispatchWindowInsetsAnimationProgress, dispatchWindowInsetsAnimationStart, dispatchWindowSystemUiVisiblityChanged, dispatchWindowVisibilityChanged, drawableHotspotChanged, drawableStateChanged, findFocus, findViewById, findViewWithTag, findViewsWithText, fitSystemWindows, focusSearch, forceHasOverlappingRendering, forceLayout, generateDisplayHash, getAccessibilityClassName, getAccessibilityDelegate, getAccessibilityLiveRegion, getAccessibilityNodeProvider, getAccessibilityPaneTitle, getAccessibilityTraversalAfter, getAccessibilityTraversalBefore, getAlpha, getAnimation, getAnimationMatrix, getApplicationWindowToken, getAttributeResolutionStack, getAttributeSourceResourceMap, getAutofillHints, getAutofillId, getAutofillType, getAutofillValue, getBackground, getBackgroundTintBlendMode, getBackgroundTintList, getBackgroundTintMode, getBaseline, getBottom, getBottomFadingEdgeStrength, getBottomPaddingOffset, getCameraDistance, getClipBounds, getClipBounds, getClipToOutline, getContentCaptureSession, getContentDescription, getContext, getContextMenuInfo, getDefaultFocusHighlightEnabled, getDisplay, getDrawableState, getDrawingCache, getDrawingCache, getDrawingCacheBackgroundColor, getDrawingCacheQuality, getDrawingRect, getDrawingTime, getElevation, getExplicitStyle, getFilterTouchesWhenObscured, getFitsSystemWindows, getFocusable, getFocusables, getFocusedRect, getForeground, getForegroundGravity, getForegroundTintBlendMode, getForegroundTintList, getForegroundTintMode, getGlobalVisibleRect, getGlobalVisibleRect, getHandler, getHasOverlappingRendering, getHeight, getHitRect, getHorizontalFadingEdgeLength, getHorizontalScrollbarHeight, getHorizontalScrollbarThumbDrawable, getHorizontalScrollbarTrackDrawable, getId, getImportantForAutofill, getImportantForContentCapture, getKeepScreenOn, getKeyDispatcherState, getLabelFor, getLayerType, getLayoutDirection, getLayoutParams, getLeft, getLeftFadingEdgeStrength, getLeftPaddingOffset, getLocalVisibleRect, getLocationInSurface, getLocationInWindow, getLocationOnScreen, getMatrix, getMeasuredHeight, getMeasuredHeightAndState, getMeasuredState, getMeasuredWidth, getMeasuredWidthAndState, getMinimumHeight, getMinimumWidth, getNextClusterForwardId, getNextFocusDownId, getNextFocusForwardId, getNextFocusLeftId, getNextFocusRightId, getNextFocusUpId, getOnFocusChangeListener, getOutlineAmbientShadowColor, getOutlineProvider, getOutlineSpotShadowColor, getOverScrollMode, getOverlay, getPaddingBottom, getPaddingEnd, getPaddingLeft, getPaddingRight, getPaddingStart, getPaddingTop, getParent, getParentForAccessibility, getPivotX, getPivotY, getPointerIcon, getReceiveContentMimeTypes, getResources, getRevealOnFocusHint, getRight, getRightFadingEdgeStrength, getRightPaddingOffset, getRootSurfaceControl, getRootView, getRootWindowInsets, getRotation, getRotationX, getRotationY, getScaleX, getScaleY, getScrollBarDefaultDelayBeforeFade, getScrollBarFadeDuration, getScrollBarSize, getScrollBarStyle, getScrollCaptureHint, getScrollIndicators, getScrollX, getScrollY, getSolidColor, getSourceLayoutResId, getStateDescription, getStateListAnimator, getSuggestedMinimumHeight, getSuggestedMinimumWidth, getSystemGestureExclusionRects, getSystemUiVisibility, getTag, getTag, getTextAlignment, getTextDirection, getTooltipText, getTop, getTopFadingEdgeStrength, getTopPaddingOffset, getTouchDelegate, getTouchables, getTransitionAlpha, getTransitionName, getTranslationX, getTranslationY, getTranslationZ, getUniqueDrawingId, getVerticalFadingEdgeLength, getVerticalScrollbarPosition, getVerticalScrollbarThumbDrawable, getVerticalScrollbarTrackDrawable, getVerticalScrollbarWidth, getViewTranslationResponse, getViewTreeObserver, getVisibility, getWidth, getWindowAttachCount, getWindowId, getWindowInsetsController, getWindowSystemUiVisibility, getWindowToken, getWindowVisibility, getWindowVisibleDisplayFrame, getX, getY, getZ, hasExplicitFocusable, hasFocus, hasFocusable, hasNestedScrollingParent, hasOnClickListeners, hasOnLongClickListeners, hasOverlappingRendering, hasPointerCapture, hasTransientState, hasWindowFocus, invalidate, invalidate, invalidate, invalidateDrawable, invalidateOutline, isAccessibilityFocused, isAccessibilityHeading, isActivated, isAttachedToWindow, isClickable, isContextClickable, isDirty, isDrawingCacheEnabled, isDuplicateParentStateEnabled, isEnabled, isFocusable, isFocusableInTouchMode, isFocused, isFocusedByDefault, isForceDarkAllowed, isHapticFeedbackEnabled, isHardwareAccelerated, isHorizontalFadingEdgeEnabled, isHorizontalScrollBarEnabled, isHovered, isImportantForAccessibility, isImportantForAutofill, isImportantForContentCapture, isInEditMode, isInLayout, isInTouchMode, isKeyboardNavigationCluster, isLaidOut, isLayoutDirectionResolved, isLayoutRequested, isLongClickable, isNestedScrollingEnabled, isOpaque, isPaddingOffsetRequired, isPaddingRelative, isPivotSet, isPressed, isSaveEnabled, isSaveFromParentEnabled, isScreenReaderFocusable, isScrollContainer, isScrollbarFadingEnabled, isSelected, isShowingLayoutBounds, isShown, isSoundEffectsEnabled, isTemporarilyDetached, isTextAlignmentResolved, isTextDirectionResolved, isVerticalFadingEdgeEnabled, isVerticalScrollBarEnabled, isVisibleToUserForAutofill, jumpDrawablesToCurrentState, keyboardNavigationClusterSearch, layout, measure, offsetLeftAndRight, offsetTopAndBottom, onAnimationEnd, onAnimationStart, onApplyWindowInsets, onCancelPendingInputEvents, onCapturedPointerEvent, onCheckIsTextEditor, onConfigurationChanged, onCreateContextMenu, onCreateDrawableState, onCreateInputConnection, onCreateViewTranslationRequest, onCreateVirtualViewTranslationRequests, onDisplayHint, onDragEvent, onDraw, onDrawForeground, onDrawScrollBars, onFilterTouchEventForSecurity, onFinishInflate, onFinishTemporaryDetach, onGenericMotionEvent, onHoverChanged, onHoverEvent, onInitializeAccessibilityEvent, onInitializeAccessibilityNodeInfo, onKeyDown, onKeyLongPress, onKeyMultiple, onKeyPreIme, onKeyShortcut, onKeyUp, onLayout, onOverScrolled, onPointerCaptureChange, onPopulateAccessibilityEvent, onProvideAutofillStructure, onProvideAutofillVirtualStructure, onProvideContentCaptureStructure, onProvideStructure, onProvideVirtualStructure, onReceiveContent, onResolvePointerIcon, onRestoreInstanceState, onRtlPropertiesChanged, onSaveInstanceState, onScreenStateChanged, onScrollCaptureSearch, onScrollChanged, onSetAlpha, onSizeChanged, onStartTemporaryDetach, onTrackballEvent, onViewTranslationResponse, onVirtualViewTranslationResponses, onVisibilityAggregated, onVisibilityChanged, onWindowFocusChanged, onWindowSystemUiVisibilityChanged, overScrollBy, performAccessibilityAction, performClick, performContextClick, performContextClick, performHapticFeedback, performHapticFeedback, performLongClick, performLongClick, performReceiveContent, playSoundEffect, post, postDelayed, postInvalidate, postInvalidate, postInvalidateDelayed, postInvalidateDelayed, postInvalidateOnAnimation, postInvalidateOnAnimation, postOnAnimation, postOnAnimationDelayed, refreshDrawableState, releasePointerCapture, removeCallbacks, removeOnAttachStateChangeListener, removeOnLayoutChangeListener, removeOnUnhandledKeyEventListener, requestApplyInsets, requestFitSystemWindows, requestFocus, requestFocus, requestFocus, requestFocusFromTouch, requestLayout, requestPointerCapture, requestRectangleOnScreen, requestRectangleOnScreen, requestUnbufferedDispatch, requestUnbufferedDispatch, requireViewById, resetPivot, restoreDefaultFocus, restoreHierarchyState, saveAttributeDataForStyleable, saveHierarchyState, scheduleDrawable, scrollBy, scrollTo, sendAccessibilityEvent, sendAccessibilityEventUnchecked, setAccessibilityDelegate, setAccessibilityHeading, setAccessibilityLiveRegion, setAccessibilityPaneTitle, setAccessibilityTraversalAfter, setAccessibilityTraversalBefore, setActivated, setAllowClickWhenDisabled, setAnimation, setAnimationMatrix, setAutofillHints, setAutofillId, setBackground, setBackgroundDrawable, setBackgroundResource, setBackgroundTintBlendMode, setBackgroundTintList, setBackgroundTintMode, setBottom, setCameraDistance, setClickable, setClipToOutline, setContentCaptureSession, setContentDescription, setContextClickable, setDefaultFocusHighlightEnabled, setDrawingCacheBackgroundColor, setDrawingCacheEnabled, setDrawingCacheQuality, setDuplicateParentStateEnabled, setElevation, setEnabled, setFadingEdgeLength, setFilterTouchesWhenObscured, setFitsSystemWindows, setFocusable, setFocusable, setFocusableInTouchMode, setFocusedByDefault, setForceDarkAllowed, setForeground, setForegroundGravity, setForegroundTintBlendMode, setForegroundTintList, setForegroundTintMode, setHapticFeedbackEnabled, setHasTransientState, setHorizontalFadingEdgeEnabled, setHorizontalScrollBarEnabled, setHorizontalScrollbarThumbDrawable, setHorizontalScrollbarTrackDrawable, setHovered, setId, setImportantForAccessibility, setImportantForAutofill, setImportantForContentCapture, setKeepScreenOn, setKeyboardNavigationCluster, setLabelFor, setLayerPaint, setLayerType, setLayoutDirection, setLayoutParams, setLeft, setLeftTopRightBottom, setLongClickable, setMeasuredDimension, setMinimumHeight, setMinimumWidth, setNestedScrollingEnabled, setNextClusterForwardId, setNextFocusDownId, setNextFocusForwardId, setNextFocusLeftId, setNextFocusRightId, setNextFocusUpId, setOnApplyWindowInsetsListener, setOnCapturedPointerListener, setOnClickListener, setOnContextClickListener, setOnCreateContextMenuListener, setOnDragListener, setOnFocusChangeListener, setOnGenericMotionListener, setOnHoverListener, setOnKeyListener, setOnLongClickListener, setOnReceiveContentListener, setOnScrollChangeListener, setOnSystemUiVisibilityChangeListener, setOnTouchListener, setOutlineAmbientShadowColor, setOutlineProvider, setOutlineSpotShadowColor, setOverScrollMode, setPadding, setPaddingRelative, setPivotX, setPivotY, setPointerIcon, setPressed, setRenderEffect, setRevealOnFocusHint, setRight, setRotation, setRotationX, setRotationY, setSaveEnabled, setSaveFromParentEnabled, setScaleX, setScaleY, setScreenReaderFocusable, setScrollBarDefaultDelayBeforeFade, setScrollBarFadeDuration, setScrollBarSize, setScrollBarStyle, setScrollCaptureCallback, setScrollCaptureHint, setScrollContainer, setScrollIndicators, setScrollIndicators, setScrollX, setScrollY, setScrollbarFadingEnabled, setSelected, setSoundEffectsEnabled, setStateDescription, setStateListAnimator, setSystemGestureExclusionRects, setSystemUiVisibility, setTag, setTag, setTextAlignment, setTextDirection, setTooltipText, setTop, setTouchDelegate, setTransitionAlpha, setTransitionName, setTransitionVisibility, setTranslationX, setTranslationY, setTranslationZ, setVerticalFadingEdgeEnabled, setVerticalScrollBarEnabled, setVerticalScrollbarPosition, setVerticalScrollbarThumbDrawable, setVerticalScrollbarTrackDrawable, setViewTranslationCallback, setWillNotCacheDrawing, setWillNotDraw, setWindowInsetsAnimationCallback, setX, setY, setZ, showContextMenu, showContextMenu, startActionMode, startActionMode, startAnimation, startDrag, startDragAndDrop, startNestedScroll, stopNestedScroll, toString, transformMatrixToGlobal, transformMatrixToLocal, unscheduleDrawable, unscheduleDrawable, updateDragShadow, verifyDrawable, willNotCacheDrawing, willNotDraw
Methods inherited from class android.opengl.GLSurfaceView
dispatchDraw, draw, gatherTransparentRegion, getHolder, getHostToken, getImportantForAccessibility, getSurfaceControl, onFocusChanged, onWindowVisibilityChanged, setAlpha, setChildSurfacePackage, setClipBounds, setSecure, setVisibility, setZOrderMediaOverlay, setZOrderOnTop
Methods inherited from class com.otaliastudios.zoom.ZoomSurfaceView
cancelAnimations, finalize, getDebugFlags, getMaxZoom, getMaxZoomType, getMinZoom, getMinZoomType, getPreserveEGLContextOnPause, getRenderMode, moveTo, moveToCenter, onAttachedToWindow, onPause, onResume, panBy, panTo, queueEvent, realZoomTo, requestRender, setAlignment, setAllowFlingInOverscroll, setAnimationDuration, setDebugFlags, setEGLConfigChooser, setEGLConfigChooser, setEGLConfigChooser, setEGLContextClientVersion, setEGLContextFactory, setEGLWindowSurfaceFactory, setFlingEnabled, setGLWrapper, setHorizontalPanEnabled, setMaxZoom, setMaxZoom, setMinZoom, setMinZoom, setOneFingerScrollEnabled, setOverPanRange, setOverPinchable, setOverScrollHorizontal, setOverScrollVertical, setOverZoomRange, setPreserveEGLContextOnPause, setRenderMode, setRenderer, setScrollEnabled, setThreeFingersScrollEnabled, setTransformation, setTransformation, setTwoFingersScrollEnabled, setVerticalPanEnabled, setZoomEnabled, surfaceChanged, surfaceCreated, surfaceDestroyed, surfaceRedrawNeeded, surfaceRedrawNeededAsync, zoomBy, zoomIn, zoomOut, zoomTo
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ZoomSurfaceView
```
ZoomSurfaceView(Context context, AttributeSet attrs)
```
  - ZoomSurfaceView
```
ZoomSurfaceView(Context context)
```
- Method Detail
  - getSurface
```
 final Surface getSurface()
```
    A Surface that can be consumed by some buffer provider. This will be non-null after Callback.onZoomSurfaceCreated and null again after Callback.onZoomSurfaceDestroyed.
    This class cares about releasing this object when done.
  - setSurface
```
 final Unit setSurface(Surface surface)
```
  - getSurfaceTexture
```
 final SurfaceTexture getSurfaceTexture()
```
    A SurfaceTexture that can be consumed by some buffer provider. This will be non-null after Callback.onZoomSurfaceCreated and null again after Callback.onZoomSurfaceDestroyed.
    This class cares about releasing this object when done.
  - setSurfaceTexture
```
 final Unit setSurfaceTexture(SurfaceTexture surfaceTexture)
```
  - getEngine
```
 final ZoomEngine getEngine()
```
  - getZoom
```
 Float getZoom()
```
    Gets the current zoom value, which can be used as a reference when calling ZoomApi.zoomTo or ZoomApi.zoomBy.
    This can be different than the actual scale you get in the matrix, because at startup we apply a base zoom to respect the "center inside" policy. All zoom calls, including min zoom and max zoom, refer to this axis, where zoom is set to 1 right after the initial transformation.
  - getRealZoom
```
 Float getRealZoom()
```
    Gets the current zoom value, including the base zoom that was eventually applied when initializing to respect the "center inside" policy. This will match the scaleX - scaleY values you get into the Matrix, and is the actual scale value of the content from its original size.
  - getPan
```
 AbsolutePoint getPan()
```
    The current pan as an AbsolutePoint.
  - getPanX
```
 Float getPanX()
```
    Returns the current horizontal pan value, in content absolute coordinates (that is, as if there was no zoom at all).
  - getPanY
```
 Float getPanY()
```
    Returns the current vertical pan value, in content absolute coordinates (that is, as if there was no zoom at all).
  - getScaledPan
```
 ScaledPoint getScaledPan()
```
    The current pan as a ScaledPoint, that is, taking into account the current zoom. This basically returns the pan value multiplied by the current realZoom.
  - getScaledPanX
```
 Float getScaledPanX()
```
    Returns the current horizontal pan value, in content scaled coordinates (that is, including the current zoom). This is equivalent to panX multiplied by realZoom.
  - getScaledPanY
```
 Float getScaledPanY()
```
    Returns the current vertical pan value, in content scaled coordinates (that is, including the current zoom). This is equivalent to panY multiplied by realZoom.
  - addCallback
```
 final Unit addCallback(ZoomSurfaceView.Callback callback)
```
    Adds a new Callback to be notified of the surface state. Should be called as soon as possible.
  - removeCallback
```
 final Unit removeCallback(ZoomSurfaceView.Callback callback)
```
    Removes a Callback previously added with addCallback.
  - setBackgroundColor
```
 Unit setBackgroundColor(Integer color)
```
    If non transparent, we will draw this background color using GL before drawing the actual texture.
  - setContentSize
```
 final Unit setContentSize(Float width, Float height)
```
    Sets the size of the content. If this is not called, the size will be assumed to be that of the ZoomSurfaceView itself. In this case, make sure to measure ZoomSurfaceView correctly or the texture will be distorted.
  - onTouchEvent
```
 Boolean onTouchEvent(MotionEvent ev)
```
  - onSurfaceCreated
```
@WorkerThread() Unit onSurfaceCreated(GL10 gl, EGLConfig config)
```
  - onSurfaceChanged
```
@WorkerThread() Unit onSurfaceChanged(GL10 gl, Integer width, Integer height)
```
  - onDrawFrame
```
@WorkerThread() Unit onDrawFrame(GL10 gl)
```
    Performs the texture and background drawing.
    An old version of this acted on surfaceTextureTransformMatrix instead of the rect modelMatrix. This has the drawback that any "background" (overscrolls, zoom < 1, ...) will draw the CLAMP_TO_BORDER texture mess and there's no way around that.
    The current version acts on textureRect.modelMatrix instead. In both cases there are some issues here.
    We passed the video size to the engine. So we must UNDO some default behavior of SurfaceView. This is done and documented in onContentOrContainerSizeChanged.
    OpenGL will apply translation first then scale, which is typically not what we want.
    OpenGL will scale with respect to some fixed point, which is typically not the pan origin. (if we work on modelMatrix, this point is the translated viewport center)
    OpenGL Y coordinates are reversed.

Class ZoomSurfaceView

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class android.view.SurfaceView

Methods inherited from class android.opengl.GLSurfaceView

Methods inherited from class com.otaliastudios.zoom.ZoomSurfaceView

Methods inherited from class java.lang.Object

Constructor Detail

ZoomSurfaceView

ZoomSurfaceView

Method Detail

getSurface

setSurface

getSurfaceTexture

setSurfaceTexture

getEngine

getZoom

getRealZoom

getPan

getPanX

getPanY

getScaledPan

getScaledPanX

getScaledPanY

addCallback

removeCallback

setBackgroundColor

setContentSize

onTouchEvent

onSurfaceCreated

onSurfaceChanged

onDrawFrame