Add support for non-antialiased text (b969a0de) · Commits · e / os / android_frameworks_base

libs/hwui/DisplayListRenderer.cpp

+0 −10

Original line number	Diff line number	Diff line
		@@ -814,7 +814,6 @@ status_t DisplayListRenderer::drawTextOnPath(const char* text, int bytesCount, i
		SkPath* path, float hOffset, float vOffset, SkPaint* paint) {
		if (!text \|\| count <= 0) return DrawGlInfo::kStatusDone;

		paint->setAntiAlias(true);
		text = refText(text, bytesCount);
		path = refPath(path);
		paint = refPaint(paint);
		@@ -833,7 +832,6 @@ status_t DisplayListRenderer::drawPosText(const char* text, int bytesCount, int
		const float* positions, SkPaint* paint) {
		if (!text \|\| count <= 0) return DrawGlInfo::kStatusDone;

		paint->setAntiAlias(true);
		text = refText(text, bytesCount);
		positions = refBuffer<float>(positions, count * 2);
		paint = refPaint(paint);
		@@ -851,14 +849,6 @@ status_t DisplayListRenderer::drawText(const char* text, int bytesCount, int cou
		float x, float y, const float* positions, SkPaint* paint, float length) {
		if (!text \|\| count <= 0) return DrawGlInfo::kStatusDone;

		// TODO: We should probably make a copy of the paint instead of modifying
		// it; modifying the paint will change its generationID the first
		// time, which might impact caches. More investigation needed to
		// see if it matters.
		// If we make a copy, then drawTextDecorations() should not make
		// its own copy as it does right now.
		// Beware: this needs Glyph encoding (already done on the Paint constructor)
		paint->setAntiAlias(true);
		if (length < 0.0f) length = paint->measureText(text, bytesCount);

		text = refText(text, bytesCount);

libs/hwui/FontRenderer.cpp

+44 −13

Original line number	Diff line number	Diff line
		@@ -218,12 +218,14 @@ void FontRenderer::cacheBitmap(const SkGlyph& glyph, CachedGlyphInfo* cachedGlyp
		cacheTexture->allocateTexture();
		}

		uint8_t* cacheBuffer = cacheTexture->getTexture();
		uint8_t* bitmapBuffer = (uint8_t*) glyph.fImage;
		unsigned int stride = glyph.rowBytes();
		// Tells us whether the glyphs is B&W (1 bit per pixel)
		// or anti-aliased (8 bits per pixel)
		SkMask::Format format = static_cast<SkMask::Format>(glyph.fMaskFormat);

		uint8_t* cacheBuffer = cacheTexture->getTexture();
		uint32_t cacheX = 0, bX = 0, cacheY = 0, bY = 0;

		// Zero out the borders
		for (cacheX = startX - TEXTURE_BORDER_SIZE; cacheX < endX + TEXTURE_BORDER_SIZE; cacheX++) {
		cacheBuffer[(startY - TEXTURE_BORDER_SIZE) * cacheWidth + cacheX] = 0;
		cacheBuffer[(endY + TEXTURE_BORDER_SIZE - 1) * cacheWidth + cacheX] = 0;
		@@ -235,20 +237,49 @@ void FontRenderer::cacheBitmap(const SkGlyph& glyph, CachedGlyphInfo* cachedGlyp
		cacheBuffer[cacheY * cacheWidth + endX + TEXTURE_BORDER_SIZE - 1] = 0;
		}

		// Copy the glyph image, taking the mask format into account
		uint8_t* bitmapBuffer = (uint8_t*) glyph.fImage;
		int stride = glyph.rowBytes();

		switch (format) {
		case SkMask::kA8_Format: {
		if (mGammaTable) {
		for (cacheY = startY, bY = 0; cacheY < endY; cacheY++, bY += stride) {
		for (cacheX = startX, bX = 0; cacheX < endX; cacheX++, bX++) {
		for (cacheY = startY, bY = 0; cacheY < endY; cacheY++, bY++) {
		uint8_t tempCol = bitmapBuffer[bY * stride + bX];
		uint8_t tempCol = bitmapBuffer[bY + bX];
		cacheBuffer[cacheY * cacheWidth + cacheX] = mGammaTable[tempCol];
		}
		}
		} else {
		for (cacheX = startX, bX = 0; cacheX < endX; cacheX++, bX++) {
		for (cacheY = startY, bY = 0; cacheY < endY; cacheY++, bY++) {
		uint8_t tempCol = bitmapBuffer[bY * stride + bX];
		cacheBuffer[cacheY * cacheWidth + cacheX] = tempCol;
		for (cacheY = startY, bY = 0; cacheY < endY; cacheY++, bY += stride) {
		memcpy(&cacheBuffer[cacheY * cacheWidth + startX], &bitmapBuffer[bY],
		glyph.fWidth);
		}
		}
		break;
		}
		case SkMask::kBW_Format: {
		static const uint8_t COLORS[2] = { 0, 255 };

		for (cacheY = startY; cacheY < endY; cacheY++) {
		cacheX = startX;
		int rowBytes = stride;
		uint8_t* buffer = bitmapBuffer;

		while (--rowBytes >= 0) {
		uint8_t b = *buffer++;
		for (int8_t mask = 7; mask >= 0 && cacheX < endX; mask--) {
		cacheBuffer[cacheY * cacheWidth + cacheX++] = COLORS[(b >> mask) & 0x1];
		}
		}

		bitmapBuffer += stride;
		}
		break;
		}
		default:
		ALOGW("Unkown glyph format: 0x%x", format);
		break;
		}

		cachedGlyph->mIsValid = true;

libs/hwui/font/Font.cpp

+8 −1

Original line number	Diff line number	Diff line
		@@ -50,6 +50,7 @@ Font::FontDescription::FontDescription(const SkPaint* paint, const mat4& matrix)
		mScaleX = paint->getTextScaleX();
		mStyle = paint->getStyle();
		mStrokeWidth = paint->getStrokeWidth();
		mAntiAliasing = paint->isAntiAlias();
		}

		Font::~Font() {
		@@ -68,6 +69,7 @@ hash_t Font::FontDescription::hash() const {
		hash = JenkinsHashMix(hash, android::hash_type(mScaleX));
		hash = JenkinsHashMix(hash, android::hash_type(mStyle));
		hash = JenkinsHashMix(hash, android::hash_type(mStrokeWidth));
		hash = JenkinsHashMix(hash, int(mAntiAliasing));
		return JenkinsHashWhiten(hash);
		}

		@@ -94,6 +96,9 @@ int Font::FontDescription::compare(const Font::FontDescription& lhs,
		if (lhs.mStrokeWidth < rhs.mStrokeWidth) return -1;
		if (lhs.mStrokeWidth > rhs.mStrokeWidth) return +1;

		deltaInt = int(lhs.mAntiAliasing) - int(rhs.mAntiAliasing);
		if (deltaInt != 0) return deltaInt;

		return 0;
		}

		@@ -384,7 +389,9 @@ void Font::updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyp
		uint32_t startY = 0;

		// Get the bitmap for the glyph
		if (!skiaGlyph.fImage) {
		paint->findImage(skiaGlyph, NULL);
		}
		mState->cacheBitmap(skiaGlyph, glyph, &startX, &startY, precaching);

		if (!glyph->mIsValid) {

libs/hwui/font/Font.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -68,6 +68,7 @@ public:
		float mScaleX;
		uint8_t mStyle;
		float mStrokeWidth;
		bool mAntiAliasing;
		};

		~Font();

tests/HwAccelerationTest/AndroidManifest.xml

+9 −0

Original line number	Diff line number	Diff line
		@@ -41,6 +41,15 @@
		</intent-filter>
		</activity>

		<activity
		android:name="NoAATextActivity"
		android:label="_NoAAText">
		<intent-filter>
		<action android:name="android.intent.action.MAIN" />
		<category android:name="android.intent.category.LAUNCHER" />
		</intent-filter>
		</activity>

		<activity
		android:name="ScaledPathsActivity"
		android:label="_ScaledPaths">