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Merge pull request #6724 from nnoury:fix/subtitles-outline-color

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PiperOrigin-RevId: 292316767
This commit is contained in:
Oliver Woodman 2020-01-30 19:30:48 +00:00 committed by Andrew Lewis
parent d162c07ecf
commit 4e6fe31ee1
2 changed files with 47 additions and 11 deletions
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5
RELEASENOTES.md
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@ -35,8 +35,11 @@
* Add `showScrubber` and `hideScrubber` methods to `DefaultTimeBar`.
* Update `TrackSelectionDialogBuilder` to use AndroidX Compat Dialog
([#7357](https://github.com/google/ExoPlayer/issues/7357)).
* Text: Use anti-aliasing and bitmap filtering when displaying bitmap
* Text:
* Use anti-aliasing and bitmap filtering when displaying bitmap
subtitles.
* Fix `SubtitlePainter` to render `EDGE_TYPE_OUTLINE` using the correct
color.
* Cronet extension: Default to using the Cronet implementation in Google Play
Services rather than Cronet Embedded. This allows Cronet to be used with a
negligible increase in application size, compared to approximately 8MB when

45
library/ui/src/main/java/com/google/android/exoplayer2/ui/SubtitlePainter.java
View File

@ -33,6 +33,7 @@ import android.text.TextPaint;
import android.text.TextUtils;
import android.text.style.AbsoluteSizeSpan;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.RelativeSizeSpan;
import android.util.DisplayMetrics;
import androidx.annotation.Nullable;
@ -99,6 +100,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
// Derived drawing variables.
private @MonotonicNonNull StaticLayout textLayout;
private @MonotonicNonNull StaticLayout edgeLayout;
private int textLeft;
private int textTop;
private int textPaddingX;
@ -291,11 +293,38 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
}
}
// Remove embedded font color to not destroy edges, otherwise it overrides edge color.
SpannableStringBuilder cueTextEdge = new SpannableStringBuilder(cueText);
if (edgeType == CaptionStyleCompat.EDGE_TYPE_OUTLINE) {
int cueLength = cueTextEdge.length();
ForegroundColorSpan[] foregroundColorSpans =
cueTextEdge.getSpans(0, cueLength, ForegroundColorSpan.class);
for (ForegroundColorSpan foregroundColorSpan : foregroundColorSpans) {
cueTextEdge.removeSpan(foregroundColorSpan);
}
}
// EDGE_TYPE_NONE & EDGE_TYPE_DROP_SHADOW both paint in one pass, they ignore cueTextEdge.
// In other cases we use two painters and we need to apply the background in the first one only,
// otherwise the background color gets drawn in front of the edge color
// (https://github.com/google/ExoPlayer/pull/6724#issuecomment-564650572).
if (Color.alpha(backgroundColor) > 0) {
if (edgeType == CaptionStyleCompat.EDGE_TYPE_NONE
|| edgeType == CaptionStyleCompat.EDGE_TYPE_DROP_SHADOW) {
SpannableStringBuilder newCueText = new SpannableStringBuilder(cueText);
newCueText.setSpan(
new BackgroundColorSpan(backgroundColor), 0, newCueText.length(), Spanned.SPAN_PRIORITY);
new BackgroundColorSpan(backgroundColor),
0,
newCueText.length(),
Spanned.SPAN_PRIORITY);
cueText = newCueText;
} else {
cueTextEdge.setSpan(
new BackgroundColorSpan(backgroundColor),
0,
cueTextEdge.length(),
Spanned.SPAN_PRIORITY);
}
}
Alignment textAlignment = cueTextAlignment == null ? Alignment.ALIGN_CENTER : cueTextAlignment;
@ -371,6 +400,9 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
// Update the derived drawing variables.
this.textLayout = new StaticLayout(cueText, textPaint, textWidth, textAlignment, spacingMult,
spacingAdd, true);
this.edgeLayout =
new StaticLayout(
cueTextEdge, textPaint, textWidth, textAlignment, spacingMult, spacingAdd, true);
this.textLeft = textLeft;
this.textTop = textTop;
this.textPaddingX = textPaddingX;
@ -410,8 +442,9 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
}
private void drawTextLayout(Canvas canvas) {
StaticLayout layout = textLayout;
if (layout == null) {
StaticLayout textLayout = this.textLayout;
StaticLayout edgeLayout = this.edgeLayout;
if (textLayout == null || edgeLayout == null) {
// Nothing to draw.
return;
}
@ -434,7 +467,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
textPaint.setStrokeWidth(outlineWidth);
textPaint.setColor(edgeColor);
textPaint.setStyle(Style.FILL_AND_STROKE);
layout.draw(canvas);
edgeLayout.draw(canvas);
} else if (edgeType == CaptionStyleCompat.EDGE_TYPE_DROP_SHADOW) {
textPaint.setShadowLayer(shadowRadius, shadowOffset, shadowOffset, edgeColor);
} else if (edgeType == CaptionStyleCompat.EDGE_TYPE_RAISED
@ -446,13 +479,13 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
textPaint.setColor(foregroundColor);
textPaint.setStyle(Style.FILL);
textPaint.setShadowLayer(shadowRadius, -offset, -offset, colorUp);
layout.draw(canvas);
edgeLayout.draw(canvas);
textPaint.setShadowLayer(shadowRadius, offset, offset, colorDown);
}
textPaint.setColor(foregroundColor);
textPaint.setStyle(Style.FILL);
layout.draw(canvas);
textLayout.draw(canvas);
textPaint.setShadowLayer(0, 0, 0, 0);
canvas.restoreToCount(saveCount);