Add APIs and implementation for additional caption edge types (ce32ea73) · Commits · e / os / android_frameworks_base

api/current.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -29974,9 +29974,11 @@ package android.view.accessibility {

		public static final class CaptioningManager.CaptionStyle {
		method public android.graphics.Typeface getTypeface();
		field public static final int EDGE_TYPE_DEPRESSED = 4; // 0x4
		field public static final int EDGE_TYPE_DROP_SHADOW = 2; // 0x2
		field public static final int EDGE_TYPE_NONE = 0; // 0x0
		field public static final int EDGE_TYPE_OUTLINE = 1; // 0x1
		field public static final int EDGE_TYPE_RAISED = 3; // 0x3
		field public final int backgroundColor;
		field public final int edgeColor;
		field public final int edgeType;

core/java/android/view/accessibility/CaptioningManager.java

+15 −4

Original line number	Diff line number	Diff line
		@@ -250,6 +250,9 @@ public class CaptioningManager {
		* background colors, edge properties, and typeface.
		*/
		public static final class CaptionStyle {
		/** Packed value for a color of 'none' and a cached opacity of 100%. */
		private static final int COLOR_NONE_OPAQUE = 0x000000FF;

		private static final CaptionStyle WHITE_ON_BLACK;
		private static final CaptionStyle BLACK_ON_WHITE;
		private static final CaptionStyle YELLOW_ON_BLACK;
		@@ -271,6 +274,12 @@ public class CaptioningManager {
		/** Edge type value specifying drop-shadowed character edges. */
		public static final int EDGE_TYPE_DROP_SHADOW = 2;

		/** Edge type value specifying raised bevel character edges. */
		public static final int EDGE_TYPE_RAISED = 3;

		/** Edge type value specifying depressed bevel character edges. */
		public static final int EDGE_TYPE_DEPRESSED = 4;

		/** The preferred foreground color for video captions. */
		public final int foregroundColor;

		@@ -283,6 +292,8 @@ public class CaptioningManager {
		* <li>{@link #EDGE_TYPE_NONE}
		* <li>{@link #EDGE_TYPE_OUTLINE}
		* <li>{@link #EDGE_TYPE_DROP_SHADOW}
		* <li>{@link #EDGE_TYPE_RAISED}
		* <li>{@link #EDGE_TYPE_DEPRESSED}
		* </ul>
		*/
		public final int edgeType;
		@@ -352,13 +363,13 @@ public class CaptioningManager {

		static {
		WHITE_ON_BLACK = new CaptionStyle(Color.WHITE, Color.BLACK, EDGE_TYPE_NONE,
		Color.BLACK, Color.TRANSPARENT, null);
		Color.BLACK, COLOR_NONE_OPAQUE, null);
		BLACK_ON_WHITE = new CaptionStyle(Color.BLACK, Color.WHITE, EDGE_TYPE_NONE,
		Color.BLACK, Color.TRANSPARENT, null);
		Color.BLACK, COLOR_NONE_OPAQUE, null);
		YELLOW_ON_BLACK = new CaptionStyle(Color.YELLOW, Color.BLACK, EDGE_TYPE_NONE,
		Color.BLACK, Color.TRANSPARENT, null);
		Color.BLACK, COLOR_NONE_OPAQUE, null);
		YELLOW_ON_BLUE = new CaptionStyle(Color.YELLOW, Color.BLUE, EDGE_TYPE_NONE,
		Color.BLACK, Color.TRANSPARENT, null);
		Color.BLACK, COLOR_NONE_OPAQUE, null);

		PRESETS = new CaptionStyle[] {
		WHITE_ON_BLACK, BLACK_ON_WHITE, YELLOW_ON_BLACK, YELLOW_ON_BLUE

core/java/com/android/internal/widget/SubtitleView.java

+25 −3

Original line number	Diff line number	Diff line
		@@ -39,6 +39,12 @@ public class SubtitleView extends View {
		// Ratio of inner padding to font size.
		private static final float INNER_PADDING_RATIO = 0.125f;

		/** Color used for the shadowed edge of a bevel. */
		private static final int COLOR_BEVEL_DARK = 0x80000000;

		/** Color used for the illuminated edge of a bevel. */
		private static final int COLOR_BEVEL_LIGHT = 0x80FFFFFF;

		// Styled dimensions.
		private final float mCornerRadius;
		private final float mOutlineWidth;
		@@ -113,7 +119,6 @@ public class SubtitleView extends View {
		// Set up density-dependent properties.
		// TODO: Move these to a default style.
		final Resources res = getContext().getResources();
		final DisplayMetrics m = res.getDisplayMetrics();
		mCornerRadius = res.getDimensionPixelSize(com.android.internal.R.dimen.subtitle_corner_radius);
		mOutlineWidth = res.getDimensionPixelSize(com.android.internal.R.dimen.subtitle_outline_width);
		mShadowRadius = res.getDimensionPixelSize(com.android.internal.R.dimen.subtitle_shadow_radius);
		@@ -312,7 +317,8 @@ public class SubtitleView extends View {
		}
		}

		if (mEdgeType == CaptionStyle.EDGE_TYPE_OUTLINE) {
		final int edgeType = mEdgeType;
		if (edgeType == CaptionStyle.EDGE_TYPE_OUTLINE) {
		textPaint.setStrokeJoin(Join.ROUND);
		textPaint.setStrokeWidth(mOutlineWidth);
		textPaint.setColor(mEdgeColor);
		@@ -321,8 +327,24 @@ public class SubtitleView extends View {
		for (int i = 0; i < lineCount; i++) {
		layout.drawText(c, i, i);
		}
		} else if (mEdgeType == CaptionStyle.EDGE_TYPE_DROP_SHADOW) {
		} else if (edgeType == CaptionStyle.EDGE_TYPE_DROP_SHADOW) {
		textPaint.setShadowLayer(mShadowRadius, mShadowOffsetX, mShadowOffsetY, mEdgeColor);
		} else if (edgeType == CaptionStyle.EDGE_TYPE_RAISED
		\|\| edgeType == CaptionStyle.EDGE_TYPE_DEPRESSED) {
		final boolean raised = edgeType == CaptionStyle.EDGE_TYPE_RAISED;
		final int colorUp = raised ? Color.WHITE : mEdgeColor;
		final int colorDown = raised ? mEdgeColor : Color.WHITE;
		final float offset = mShadowRadius / 2f;

		textPaint.setColor(mForegroundColor);
		textPaint.setStyle(Style.FILL);
		textPaint.setShadowLayer(mShadowRadius, -offset, -offset, colorUp);

		for (int i = 0; i < lineCount; i++) {
		layout.drawText(c, i, i);
		}

		textPaint.setShadowLayer(mShadowRadius, offset, offset, colorDown);
		}

		textPaint.setColor(mForegroundColor);