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am 85399cc6: Merge "Refactor FontRenderer.cpp" into jb-mr1-dev

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* commit '85399cc606a456e7b439352aea58d4b679d8f1ac':
  Refactor FontRenderer.cpp
This commit is contained in:
Romain Guy
2012-09-04 15:07:42 -07:00
committed by Android Git Automerger
parent e0315178f5 85399cc606
commit a683bda02a
9 changed files with 1005 additions and 829 deletions
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2
libs/hwui/Android.mk
View File

@@ -6,6 +6,8 @@ include $(CLEAR_VARS)
ifeq ($(USE_OPENGL_RENDERER),true)
LOCAL_SRC_FILES:= \
utils/SortedListImpl.cpp \
font/CacheTexture.cpp \
font/Font.cpp \
FontRenderer.cpp \
GammaFontRenderer.cpp \
Caches.cpp \

590
libs/hwui/FontRenderer.cpp
View File

@@ -25,584 +25,11 @@
#include "Caches.h"
#include "Debug.h"
#include "FontRenderer.h"
#include "Caches.h"
#include "Rect.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
#define DEFAULT_TEXT_SMALL_CACHE_WIDTH 1024
#define DEFAULT_TEXT_SMALL_CACHE_HEIGHT 256
#define DEFAULT_TEXT_LARGE_CACHE_WIDTH 2048
#define DEFAULT_TEXT_LARGE_CACHE_HEIGHT 512
#define CACHE_BLOCK_ROUNDING_SIZE 4
#define AUTO_KERN(prev, next) (((next) - (prev) + 32) >> 6 << 16)
///////////////////////////////////////////////////////////////////////////////
// CacheBlock
///////////////////////////////////////////////////////////////////////////////
/**
* Insert new block into existing linked list of blocks. Blocks are sorted in increasing-width
* order, except for the final block (the remainder space at the right, since we fill from the
* left).
*/
CacheBlock* CacheBlock::insertBlock(CacheBlock* head, CacheBlock *newBlock) {
#if DEBUG_FONT_RENDERER
ALOGD("insertBlock: this, x, y, w, h = %p, %d, %d, %d, %d",
newBlock, newBlock->mX, newBlock->mY,
newBlock->mWidth, newBlock->mHeight);
#endif
CacheBlock *currBlock = head;
CacheBlock *prevBlock = NULL;
while (currBlock && currBlock->mY != TEXTURE_BORDER_SIZE) {
if (newBlock->mWidth < currBlock->mWidth) {
newBlock->mNext = currBlock;
newBlock->mPrev = prevBlock;
currBlock->mPrev = newBlock;
if (prevBlock) {
prevBlock->mNext = newBlock;
return head;
} else {
return newBlock;
}
}
prevBlock = currBlock;
currBlock = currBlock->mNext;
}
// new block larger than all others - insert at end (but before the remainder space, if there)
newBlock->mNext = currBlock;
newBlock->mPrev = prevBlock;
if (currBlock) {
currBlock->mPrev = newBlock;
}
if (prevBlock) {
prevBlock->mNext = newBlock;
return head;
} else {
return newBlock;
}
}
CacheBlock* CacheBlock::removeBlock(CacheBlock* head, CacheBlock *blockToRemove) {
#if DEBUG_FONT_RENDERER
ALOGD("removeBlock: this, x, y, w, h = %p, %d, %d, %d, %d",
blockToRemove, blockToRemove->mX, blockToRemove->mY,
blockToRemove->mWidth, blockToRemove->mHeight);
#endif
CacheBlock* newHead = head;
CacheBlock* nextBlock = blockToRemove->mNext;
CacheBlock* prevBlock = blockToRemove->mPrev;
if (prevBlock) {
prevBlock->mNext = nextBlock;
} else {
newHead = nextBlock;
}
if (nextBlock) {
nextBlock->mPrev = prevBlock;
}
delete blockToRemove;
return newHead;
}
///////////////////////////////////////////////////////////////////////////////
// CacheTexture
///////////////////////////////////////////////////////////////////////////////
bool CacheTexture::fitBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY) {
if (glyph.fHeight + TEXTURE_BORDER_SIZE > mHeight) {
return false;
}
uint16_t glyphW = glyph.fWidth + TEXTURE_BORDER_SIZE;
uint16_t glyphH = glyph.fHeight + TEXTURE_BORDER_SIZE;
// roundedUpW equals glyphW to the next multiple of CACHE_BLOCK_ROUNDING_SIZE.
// This columns for glyphs that are close but not necessarily exactly the same size. It trades
// off the loss of a few pixels for some glyphs against the ability to store more glyphs
// of varying sizes in one block.
uint16_t roundedUpW =
(glyphW + CACHE_BLOCK_ROUNDING_SIZE - 1) & -CACHE_BLOCK_ROUNDING_SIZE;
CacheBlock *cacheBlock = mCacheBlocks;
while (cacheBlock) {
// Store glyph in this block iff: it fits the block's remaining space and:
// it's the remainder space (mY == 0) or there's only enough height for this one glyph
// or it's within ROUNDING_SIZE of the block width
if (roundedUpW <= cacheBlock->mWidth && glyphH <= cacheBlock->mHeight &&
(cacheBlock->mY == TEXTURE_BORDER_SIZE ||
(cacheBlock->mWidth - roundedUpW < CACHE_BLOCK_ROUNDING_SIZE))) {
if (cacheBlock->mHeight - glyphH < glyphH) {
// Only enough space for this glyph - don't bother rounding up the width
roundedUpW = glyphW;
}
*retOriginX = cacheBlock->mX;
*retOriginY = cacheBlock->mY;
// If this is the remainder space, create a new cache block for this column. Otherwise,
// adjust the info about this column.
if (cacheBlock->mY == TEXTURE_BORDER_SIZE) {
uint16_t oldX = cacheBlock->mX;
// Adjust remainder space dimensions
cacheBlock->mWidth -= roundedUpW;
cacheBlock->mX += roundedUpW;
if (mHeight - glyphH >= glyphH) {
// There's enough height left over to create a new CacheBlock
CacheBlock *newBlock = new CacheBlock(oldX, glyphH + TEXTURE_BORDER_SIZE,
roundedUpW, mHeight - glyphH - TEXTURE_BORDER_SIZE);
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: Created new block: this, x, y, w, h = %p, %d, %d, %d, %d",
newBlock, newBlock->mX, newBlock->mY,
newBlock->mWidth, newBlock->mHeight);
#endif
mCacheBlocks = CacheBlock::insertBlock(mCacheBlocks, newBlock);
}
} else {
// Insert into current column and adjust column dimensions
cacheBlock->mY += glyphH;
cacheBlock->mHeight -= glyphH;
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: Added to existing block: this, x, y, w, h = %p, %d, %d, %d, %d",
cacheBlock, cacheBlock->mX, cacheBlock->mY,
cacheBlock->mWidth, cacheBlock->mHeight);
#endif
}
if (cacheBlock->mHeight < fmin(glyphH, glyphW)) {
// If remaining space in this block is too small to be useful, remove it
mCacheBlocks = CacheBlock::removeBlock(mCacheBlocks, cacheBlock);
}
mDirty = true;
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: current block list:");
mCacheBlocks->output();
#endif
++mNumGlyphs;
return true;
}
cacheBlock = cacheBlock->mNext;
}
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: returning false for glyph of size %d, %d", glyphW, glyphH);
#endif
return false;
}
///////////////////////////////////////////////////////////////////////////////
// Font
///////////////////////////////////////////////////////////////////////////////
Font::Font(FontRenderer* state, uint32_t fontId, float fontSize,
int flags, uint32_t italicStyle, uint32_t scaleX,
SkPaint::Style style, uint32_t strokeWidth) :
mState(state), mFontId(fontId), mFontSize(fontSize),
mFlags(flags), mItalicStyle(italicStyle), mScaleX(scaleX),
mStyle(style), mStrokeWidth(mStrokeWidth) {
}
Font::~Font() {
for (uint32_t ct = 0; ct < mState->mActiveFonts.size(); ct++) {
if (mState->mActiveFonts[ct] == this) {
mState->mActiveFonts.removeAt(ct);
break;
}
}
for (uint32_t i = 0; i < mCachedGlyphs.size(); i++) {
delete mCachedGlyphs.valueAt(i);
}
}
void Font::invalidateTextureCache(CacheTexture *cacheTexture) {
for (uint32_t i = 0; i < mCachedGlyphs.size(); i++) {
CachedGlyphInfo* cachedGlyph = mCachedGlyphs.valueAt(i);
if (cacheTexture == NULL || cachedGlyph->mCacheTexture == cacheTexture) {
cachedGlyph->mIsValid = false;
}
}
}
void Font::measureCachedGlyph(CachedGlyphInfo *glyph, int x, int y,
uint8_t* bitmap, uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* pos) {
int nPenX = x + glyph->mBitmapLeft;
int nPenY = y + glyph->mBitmapTop;
int width = (int) glyph->mBitmapWidth;
int height = (int) glyph->mBitmapHeight;
if (bounds->bottom > nPenY) {
bounds->bottom = nPenY;
}
if (bounds->left > nPenX) {
bounds->left = nPenX;
}
if (bounds->right < nPenX + width) {
bounds->right = nPenX + width;
}
if (bounds->top < nPenY + height) {
bounds->top = nPenY + height;
}
}
void Font::drawCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t* bitmap, uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* pos) {
int nPenX = x + glyph->mBitmapLeft;
int nPenY = y + glyph->mBitmapTop + glyph->mBitmapHeight;
float u1 = glyph->mBitmapMinU;
float u2 = glyph->mBitmapMaxU;
float v1 = glyph->mBitmapMinV;
float v2 = glyph->mBitmapMaxV;
int width = (int) glyph->mBitmapWidth;
int height = (int) glyph->mBitmapHeight;
mState->appendMeshQuad(nPenX, nPenY, u1, v2,
nPenX + width, nPenY, u2, v2,
nPenX + width, nPenY - height, u2, v1,
nPenX, nPenY - height, u1, v1, glyph->mCacheTexture);
}
void Font::drawCachedGlyphBitmap(CachedGlyphInfo* glyph, int x, int y,
uint8_t* bitmap, uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* pos) {
int nPenX = x + glyph->mBitmapLeft;
int nPenY = y + glyph->mBitmapTop;
uint32_t endX = glyph->mStartX + glyph->mBitmapWidth;
uint32_t endY = glyph->mStartY + glyph->mBitmapHeight;
CacheTexture *cacheTexture = glyph->mCacheTexture;
uint32_t cacheWidth = cacheTexture->mWidth;
const uint8_t* cacheBuffer = cacheTexture->mTexture;
uint32_t cacheX = 0, cacheY = 0;
int32_t bX = 0, bY = 0;
for (cacheX = glyph->mStartX, bX = nPenX; cacheX < endX; cacheX++, bX++) {
for (cacheY = glyph->mStartY, bY = nPenY; cacheY < endY; cacheY++, bY++) {
#if DEBUG_FONT_RENDERER
if (bX < 0 || bY < 0 || bX >= (int32_t) bitmapW || bY >= (int32_t) bitmapH) {
ALOGE("Skipping invalid index");
continue;
}
#endif
uint8_t tempCol = cacheBuffer[cacheY * cacheWidth + cacheX];
bitmap[bY * bitmapW + bX] = tempCol;
}
}
}
void Font::drawCachedGlyph(CachedGlyphInfo* glyph, float x, float hOffset, float vOffset,
SkPathMeasure& measure, SkPoint* position, SkVector* tangent) {
const float halfWidth = glyph->mBitmapWidth * 0.5f;
const float height = glyph->mBitmapHeight;
vOffset += glyph->mBitmapTop + height;
SkPoint destination[4];
measure.getPosTan(x + hOffset + glyph->mBitmapLeft + halfWidth, position, tangent);
// Move along the tangent and offset by the normal
destination[0].set(-tangent->fX * halfWidth - tangent->fY * vOffset,
-tangent->fY * halfWidth + tangent->fX * vOffset);
destination[1].set(tangent->fX * halfWidth - tangent->fY * vOffset,
tangent->fY * halfWidth + tangent->fX * vOffset);
destination[2].set(destination[1].fX + tangent->fY * height,
destination[1].fY - tangent->fX * height);
destination[3].set(destination[0].fX + tangent->fY * height,
destination[0].fY - tangent->fX * height);
const float u1 = glyph->mBitmapMinU;
const float u2 = glyph->mBitmapMaxU;
const float v1 = glyph->mBitmapMinV;
const float v2 = glyph->mBitmapMaxV;
mState->appendRotatedMeshQuad(
position->fX + destination[0].fX,
position->fY + destination[0].fY, u1, v2,
position->fX + destination[1].fX,
position->fY + destination[1].fY, u2, v2,
position->fX + destination[2].fX,
position->fY + destination[2].fY, u2, v1,
position->fX + destination[3].fX,
position->fY + destination[3].fY, u1, v1,
glyph->mCacheTexture);
}
CachedGlyphInfo* Font::getCachedGlyph(SkPaint* paint, glyph_t textUnit, bool precaching) {
CachedGlyphInfo* cachedGlyph = NULL;
ssize_t index = mCachedGlyphs.indexOfKey(textUnit);
if (index >= 0) {
cachedGlyph = mCachedGlyphs.valueAt(index);
} else {
cachedGlyph = cacheGlyph(paint, textUnit, precaching);
}
// Is the glyph still in texture cache?
if (!cachedGlyph->mIsValid) {
const SkGlyph& skiaGlyph = GET_METRICS(paint, textUnit);
updateGlyphCache(paint, skiaGlyph, cachedGlyph, precaching);
}
return cachedGlyph;
}
void Font::render(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH) {
if (bitmap != NULL && bitmapW > 0 && bitmapH > 0) {
render(paint, text, start, len, numGlyphs, x, y, BITMAP, bitmap,
bitmapW, bitmapH, NULL, NULL);
} else {
render(paint, text, start, len, numGlyphs, x, y, FRAMEBUFFER, NULL,
0, 0, NULL, NULL);
}
}
void Font::render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, const float* positions) {
render(paint, text, start, len, numGlyphs, x, y, FRAMEBUFFER, NULL,
0, 0, NULL, positions);
}
void Font::render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, SkPath* path, float hOffset, float vOffset) {
if (numGlyphs == 0 || text == NULL || len == 0) {
return;
}
text += start;
int glyphsCount = 0;
SkFixed prevRsbDelta = 0;
float penX = 0.0f;
SkPoint position;
SkVector tangent;
SkPathMeasure measure(*path, false);
float pathLength = SkScalarToFloat(measure.getLength());
if (paint->getTextAlign() != SkPaint::kLeft_Align) {
float textWidth = SkScalarToFloat(paint->measureText(text, len));
float pathOffset = pathLength;
if (paint->getTextAlign() == SkPaint::kCenter_Align) {
textWidth *= 0.5f;
pathOffset *= 0.5f;
}
penX += pathOffset - textWidth;
}
while (glyphsCount < numGlyphs && penX < pathLength) {
glyph_t glyph = GET_GLYPH(text);
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
penX += SkFixedToFloat(AUTO_KERN(prevRsbDelta, cachedGlyph->mLsbDelta));
prevRsbDelta = cachedGlyph->mRsbDelta;
if (cachedGlyph->mIsValid) {
drawCachedGlyph(cachedGlyph, penX, hOffset, vOffset, measure, &position, &tangent);
}
penX += SkFixedToFloat(cachedGlyph->mAdvanceX);
glyphsCount++;
}
}
void Font::measure(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, Rect *bounds, const float* positions) {
if (bounds == NULL) {
ALOGE("No return rectangle provided to measure text");
return;
}
bounds->set(1e6, -1e6, -1e6, 1e6);
render(paint, text, start, len, numGlyphs, 0, 0, MEASURE, NULL, 0, 0, bounds, positions);
}
void Font::precache(SkPaint* paint, const char* text, int numGlyphs) {
if (numGlyphs == 0 || text == NULL) {
return;
}
int glyphsCount = 0;
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph, true);
glyphsCount++;
}
}
void Font::render(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, RenderMode mode, uint8_t *bitmap,
uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* positions) {
if (numGlyphs == 0 || text == NULL || len == 0) {
return;
}
static RenderGlyph gRenderGlyph[] = {
&android::uirenderer::Font::drawCachedGlyph,
&android::uirenderer::Font::drawCachedGlyphBitmap,
&android::uirenderer::Font::measureCachedGlyph
};
RenderGlyph render = gRenderGlyph[mode];
text += start;
int glyphsCount = 0;
if (CC_LIKELY(positions == NULL)) {
SkFixed prevRsbDelta = 0;
float penX = x + 0.5f;
int penY = y;
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
penX += SkFixedToFloat(AUTO_KERN(prevRsbDelta, cachedGlyph->mLsbDelta));
prevRsbDelta = cachedGlyph->mRsbDelta;
// If it's still not valid, we couldn't cache it, so we shouldn't draw garbage
if (cachedGlyph->mIsValid) {
(*this.*render)(cachedGlyph, (int) floorf(penX), penY,
bitmap, bitmapW, bitmapH, bounds, positions);
}
penX += SkFixedToFloat(cachedGlyph->mAdvanceX);
glyphsCount++;
}
} else {
const SkPaint::Align align = paint->getTextAlign();
// This is for renderPosText()
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
// If it's still not valid, we couldn't cache it, so we shouldn't draw garbage
if (cachedGlyph->mIsValid) {
int penX = x + positions[(glyphsCount << 1)];
int penY = y + positions[(glyphsCount << 1) + 1];
switch (align) {
case SkPaint::kRight_Align:
penX -= SkFixedToFloat(cachedGlyph->mAdvanceX);
penY -= SkFixedToFloat(cachedGlyph->mAdvanceY);
break;
case SkPaint::kCenter_Align:
penX -= SkFixedToFloat(cachedGlyph->mAdvanceX >> 1);
penY -= SkFixedToFloat(cachedGlyph->mAdvanceY >> 1);
default:
break;
}
(*this.*render)(cachedGlyph, penX, penY,
bitmap, bitmapW, bitmapH, bounds, positions);
}
glyphsCount++;
}
}
}
void Font::updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyphInfo* glyph,
bool precaching) {
glyph->mAdvanceX = skiaGlyph.fAdvanceX;
glyph->mAdvanceY = skiaGlyph.fAdvanceY;
glyph->mBitmapLeft = skiaGlyph.fLeft;
glyph->mBitmapTop = skiaGlyph.fTop;
glyph->mLsbDelta = skiaGlyph.fLsbDelta;
glyph->mRsbDelta = skiaGlyph.fRsbDelta;
uint32_t startX = 0;
uint32_t startY = 0;
// Get the bitmap for the glyph
paint->findImage(skiaGlyph);
mState->cacheBitmap(skiaGlyph, glyph, &startX, &startY, precaching);
if (!glyph->mIsValid) {
return;
}
uint32_t endX = startX + skiaGlyph.fWidth;
uint32_t endY = startY + skiaGlyph.fHeight;
glyph->mStartX = startX;
glyph->mStartY = startY;
glyph->mBitmapWidth = skiaGlyph.fWidth;
glyph->mBitmapHeight = skiaGlyph.fHeight;
uint32_t cacheWidth = glyph->mCacheTexture->mWidth;
uint32_t cacheHeight = glyph->mCacheTexture->mHeight;
glyph->mBitmapMinU = startX / (float) cacheWidth;
glyph->mBitmapMinV = startY / (float) cacheHeight;
glyph->mBitmapMaxU = endX / (float) cacheWidth;
glyph->mBitmapMaxV = endY / (float) cacheHeight;
mState->mUploadTexture = true;
}
CachedGlyphInfo* Font::cacheGlyph(SkPaint* paint, glyph_t glyph, bool precaching) {
CachedGlyphInfo* newGlyph = new CachedGlyphInfo();
mCachedGlyphs.add(glyph, newGlyph);
const SkGlyph& skiaGlyph = GET_METRICS(paint, glyph);
newGlyph->mGlyphIndex = skiaGlyph.fID;
newGlyph->mIsValid = false;
updateGlyphCache(paint, skiaGlyph, newGlyph, precaching);
return newGlyph;
}
Font* Font::create(FontRenderer* state, uint32_t fontId, float fontSize,
int flags, uint32_t italicStyle, uint32_t scaleX,
SkPaint::Style style, uint32_t strokeWidth) {
Vector<Font*> &activeFonts = state->mActiveFonts;
for (uint32_t i = 0; i < activeFonts.size(); i++) {
Font* font = activeFonts[i];
if (font->mFontId == fontId && font->mFontSize == fontSize &&
font->mFlags == flags && font->mItalicStyle == italicStyle &&
font->mScaleX == scaleX && font->mStyle == style &&
(style == SkPaint::kFill_Style || font->mStrokeWidth == strokeWidth)) {
return font;
}
}
Font* newFont = new Font(state, fontId, fontSize, flags, italicStyle,
scaleX, style, strokeWidth);
activeFonts.push(newFont);
return newFont;
}
///////////////////////////////////////////////////////////////////////////////
// FontRenderer
///////////////////////////////////////////////////////////////////////////////
@@ -636,20 +63,25 @@ FontRenderer::FontRenderer() {
if (property_get(PROPERTY_TEXT_SMALL_CACHE_WIDTH, property, NULL) > 0) {
mSmallCacheWidth = atoi(property);
}
if (property_get(PROPERTY_TEXT_SMALL_CACHE_HEIGHT, property, NULL) > 0) {
mSmallCacheHeight = atoi(property);
}
if (property_get(PROPERTY_TEXT_LARGE_CACHE_WIDTH, property, NULL) > 0) {
mLargeCacheWidth = atoi(property);
}
if (property_get(PROPERTY_TEXT_LARGE_CACHE_HEIGHT, property, NULL) > 0) {
mLargeCacheHeight = atoi(property);
}
GLint maxTextureSize = Caches::getInstance().maxTextureSize;
mSmallCacheWidth = (mSmallCacheWidth > maxTextureSize) ? maxTextureSize : mSmallCacheWidth;
mSmallCacheHeight = (mSmallCacheHeight > maxTextureSize) ? maxTextureSize : mSmallCacheHeight;
mLargeCacheWidth = (mLargeCacheWidth > maxTextureSize) ? maxTextureSize : mLargeCacheWidth;
mLargeCacheHeight = (mLargeCacheHeight > maxTextureSize) ? maxTextureSize : mLargeCacheHeight;
uint32_t maxTextureSize = (uint32_t) Caches::getInstance().maxTextureSize;
mSmallCacheWidth = mSmallCacheWidth > maxTextureSize ? maxTextureSize : mSmallCacheWidth;
mSmallCacheHeight = mSmallCacheHeight > maxTextureSize ? maxTextureSize : mSmallCacheHeight;
mLargeCacheWidth = mLargeCacheWidth > maxTextureSize ? maxTextureSize : mLargeCacheWidth;
mLargeCacheHeight = mLargeCacheHeight > maxTextureSize ? maxTextureSize : mLargeCacheHeight;
if (sLogFontRendererCreate) {
INIT_LOGD(" Text cache sizes, in pixels: %i x %i, %i x %i, %i x %i, %i x %i",
mSmallCacheWidth, mSmallCacheHeight,

254
libs/hwui/FontRenderer.h
View File

@@ -17,267 +17,21 @@
#ifndef ANDROID_HWUI_FONT_RENDERER_H
#define ANDROID_HWUI_FONT_RENDERER_H
#include <utils/String8.h>
#include <utils/String16.h>
#include <utils/Vector.h>
#include <utils/KeyedVector.h>
#include <SkScalerContext.h>
#include <SkPaint.h>
#include <SkPathMeasure.h>
#include <SkPoint.h>
#include <GLES2/gl2.h>
#include "Rect.h"
#include "font/FontUtil.h"
#include "font/CacheTexture.h"
#include "font/CachedGlyphInfo.h"
#include "font/Font.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
#if RENDER_TEXT_AS_GLYPHS
typedef uint16_t glyph_t;
#define TO_GLYPH(g) g
#define GET_METRICS(paint, glyph) paint->getGlyphMetrics(glyph)
#define GET_GLYPH(text) nextGlyph((const uint16_t**) &text)
#define IS_END_OF_STRING(glyph) false
#else
typedef SkUnichar glyph_t;
#define TO_GLYPH(g) ((SkUnichar) g)
#define GET_METRICS(paint, glyph) paint->getUnicharMetrics(glyph)
#define GET_GLYPH(text) SkUTF16_NextUnichar((const uint16_t**) &text)
#define IS_END_OF_STRING(glyph) glyph < 0
#endif
#define TEXTURE_BORDER_SIZE 1
///////////////////////////////////////////////////////////////////////////////
// Declarations
///////////////////////////////////////////////////////////////////////////////
class FontRenderer;
/**
* CacheBlock is a node in a linked list of current free space areas in a CacheTexture.
* Using CacheBlocks enables us to pack the cache from top to bottom as well as left to right.
* When we add a glyph to the cache, we see if it fits within one of the existing columns that
* have already been started (this is the case if the glyph fits vertically as well as
* horizontally, and if its width is sufficiently close to the column width to avoid
* sub-optimal packing of small glyphs into wide columns). If there is no column in which the
* glyph fits, we check the final node, which is the remaining space in the cache, creating
* a new column as appropriate.
*
* As columns fill up, we remove their CacheBlock from the list to avoid having to check
* small blocks in the future.
*/
struct CacheBlock {
uint16_t mX;
uint16_t mY;
uint16_t mWidth;
uint16_t mHeight;
CacheBlock* mNext;
CacheBlock* mPrev;
CacheBlock(uint16_t x, uint16_t y, uint16_t width, uint16_t height, bool empty = false):
mX(x), mY(y), mWidth(width), mHeight(height), mNext(NULL), mPrev(NULL)
{
}
static CacheBlock* insertBlock(CacheBlock* head, CacheBlock *newBlock);
static CacheBlock* removeBlock(CacheBlock* head, CacheBlock *blockToRemove);
void output() {
CacheBlock *currBlock = this;
while (currBlock) {
ALOGD("Block: this, x, y, w, h = %p, %d, %d, %d, %d",
currBlock, currBlock->mX, currBlock->mY, currBlock->mWidth, currBlock->mHeight);
currBlock = currBlock->mNext;
}
}
};
class CacheTexture {
public:
CacheTexture(uint16_t width, uint16_t height) :
mTexture(NULL), mTextureId(0), mWidth(width), mHeight(height),
mLinearFiltering(false), mDirty(false), mNumGlyphs(0) {
mCacheBlocks = new CacheBlock(TEXTURE_BORDER_SIZE, TEXTURE_BORDER_SIZE,
mWidth - TEXTURE_BORDER_SIZE, mHeight - TEXTURE_BORDER_SIZE, true);
}
~CacheTexture() {
if (mTexture) {
delete[] mTexture;
}
if (mTextureId) {
glDeleteTextures(1, &mTextureId);
}
reset();
}
void reset() {
// Delete existing cache blocks
while (mCacheBlocks != NULL) {
CacheBlock* tmpBlock = mCacheBlocks;
mCacheBlocks = mCacheBlocks->mNext;
delete tmpBlock;
}
mNumGlyphs = 0;
}
void init() {
// reset, then create a new remainder space to start again
reset();
mCacheBlocks = new CacheBlock(TEXTURE_BORDER_SIZE, TEXTURE_BORDER_SIZE,
mWidth - TEXTURE_BORDER_SIZE, mHeight - TEXTURE_BORDER_SIZE, true);
}
bool fitBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY);
uint8_t* mTexture;
GLuint mTextureId;
uint16_t mWidth;
uint16_t mHeight;
bool mLinearFiltering;
bool mDirty;
uint16_t mNumGlyphs;
CacheBlock* mCacheBlocks;
};
struct CachedGlyphInfo {
// Has the cache been invalidated?
bool mIsValid;
// Location of the cached glyph in the bitmap
// in case we need to resize the texture or
// render to bitmap
uint32_t mStartX;
uint32_t mStartY;
uint32_t mBitmapWidth;
uint32_t mBitmapHeight;
// Also cache texture coords for the quad
float mBitmapMinU;
float mBitmapMinV;
float mBitmapMaxU;
float mBitmapMaxV;
// Minimize how much we call freetype
uint32_t mGlyphIndex;
uint32_t mAdvanceX;
uint32_t mAdvanceY;
// Values below contain a glyph's origin in the bitmap
int32_t mBitmapLeft;
int32_t mBitmapTop;
// Auto-kerning
SkFixed mLsbDelta;
SkFixed mRsbDelta;
CacheTexture* mCacheTexture;
};
///////////////////////////////////////////////////////////////////////////////
// Font
///////////////////////////////////////////////////////////////////////////////
/**
* Represents a font, defined by a Skia font id and a font size. A font is used
* to generate glyphs and cache them in the FontState.
*/
class Font {
public:
enum Style {
kFakeBold = 1
};
~Font();
/**
* Renders the specified string of text.
* If bitmap is specified, it will be used as the render target
*/
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, uint8_t *bitmap = NULL,
uint32_t bitmapW = 0, uint32_t bitmapH = 0);
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, const float* positions);
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, SkPath* path, float hOffset, float vOffset);
/**
* Creates a new font associated with the specified font state.
*/
static Font* create(FontRenderer* state, uint32_t fontId, float fontSize,
int flags, uint32_t italicStyle, uint32_t scaleX, SkPaint::Style style,
uint32_t strokeWidth);
protected:
friend class FontRenderer;
typedef void (Font::*RenderGlyph)(CachedGlyphInfo*, int, int, uint8_t*,
uint32_t, uint32_t, Rect*, const float*);
enum RenderMode {
FRAMEBUFFER,
BITMAP,
MEASURE,
};
void precache(SkPaint* paint, const char* text, int numGlyphs);
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, RenderMode mode, uint8_t *bitmap,
uint32_t bitmapW, uint32_t bitmapH, Rect *bounds, const float* positions);
void measure(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, Rect *bounds, const float* positions);
Font(FontRenderer* state, uint32_t fontId, float fontSize, int flags, uint32_t italicStyle,
uint32_t scaleX, SkPaint::Style style, uint32_t strokeWidth);
// Cache of glyphs
DefaultKeyedVector<glyph_t, CachedGlyphInfo*> mCachedGlyphs;
void invalidateTextureCache(CacheTexture *cacheTexture = NULL);
CachedGlyphInfo* cacheGlyph(SkPaint* paint, glyph_t glyph, bool precaching);
void updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyphInfo* glyph,
bool precaching);
void measureCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyphBitmap(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyph(CachedGlyphInfo* glyph, float x, float hOffset, float vOffset,
SkPathMeasure& measure, SkPoint* position, SkVector* tangent);
CachedGlyphInfo* getCachedGlyph(SkPaint* paint, glyph_t textUnit, bool precaching = false);
static glyph_t nextGlyph(const uint16_t** srcPtr) {
const uint16_t* src = *srcPtr;
glyph_t g = *src++;
*srcPtr = src;
return g;
}
FontRenderer* mState;
uint32_t mFontId;
float mFontSize;
int mFlags;
uint32_t mItalicStyle;
uint32_t mScaleX;
SkPaint::Style mStyle;
uint32_t mStrokeWidth;
};
///////////////////////////////////////////////////////////////////////////////
// Renderer
///////////////////////////////////////////////////////////////////////////////

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <utils/Log.h>
#include "Debug.h"
#include "CacheTexture.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// CacheBlock
///////////////////////////////////////////////////////////////////////////////
/**
* Insert new block into existing linked list of blocks. Blocks are sorted in increasing-width
* order, except for the final block (the remainder space at the right, since we fill from the
* left).
*/
CacheBlock* CacheBlock::insertBlock(CacheBlock* head, CacheBlock *newBlock) {
#if DEBUG_FONT_RENDERER
ALOGD("insertBlock: this, x, y, w, h = %p, %d, %d, %d, %d",
newBlock, newBlock->mX, newBlock->mY,
newBlock->mWidth, newBlock->mHeight);
#endif
CacheBlock *currBlock = head;
CacheBlock *prevBlock = NULL;
while (currBlock && currBlock->mY != TEXTURE_BORDER_SIZE) {
if (newBlock->mWidth < currBlock->mWidth) {
newBlock->mNext = currBlock;
newBlock->mPrev = prevBlock;
currBlock->mPrev = newBlock;
if (prevBlock) {
prevBlock->mNext = newBlock;
return head;
} else {
return newBlock;
}
}
prevBlock = currBlock;
currBlock = currBlock->mNext;
}
// new block larger than all others - insert at end (but before the remainder space, if there)
newBlock->mNext = currBlock;
newBlock->mPrev = prevBlock;
if (currBlock) {
currBlock->mPrev = newBlock;
}
if (prevBlock) {
prevBlock->mNext = newBlock;
return head;
} else {
return newBlock;
}
}
CacheBlock* CacheBlock::removeBlock(CacheBlock* head, CacheBlock *blockToRemove) {
#if DEBUG_FONT_RENDERER
ALOGD("removeBlock: this, x, y, w, h = %p, %d, %d, %d, %d",
blockToRemove, blockToRemove->mX, blockToRemove->mY,
blockToRemove->mWidth, blockToRemove->mHeight);
#endif
CacheBlock* newHead = head;
CacheBlock* nextBlock = blockToRemove->mNext;
CacheBlock* prevBlock = blockToRemove->mPrev;
if (prevBlock) {
prevBlock->mNext = nextBlock;
} else {
newHead = nextBlock;
}
if (nextBlock) {
nextBlock->mPrev = prevBlock;
}
delete blockToRemove;
return newHead;
}
///////////////////////////////////////////////////////////////////////////////
// CacheTexture
///////////////////////////////////////////////////////////////////////////////
bool CacheTexture::fitBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY) {
if (glyph.fHeight + TEXTURE_BORDER_SIZE > mHeight) {
return false;
}
uint16_t glyphW = glyph.fWidth + TEXTURE_BORDER_SIZE;
uint16_t glyphH = glyph.fHeight + TEXTURE_BORDER_SIZE;
// roundedUpW equals glyphW to the next multiple of CACHE_BLOCK_ROUNDING_SIZE.
// This columns for glyphs that are close but not necessarily exactly the same size. It trades
// off the loss of a few pixels for some glyphs against the ability to store more glyphs
// of varying sizes in one block.
uint16_t roundedUpW =
(glyphW + CACHE_BLOCK_ROUNDING_SIZE - 1) & -CACHE_BLOCK_ROUNDING_SIZE;
CacheBlock *cacheBlock = mCacheBlocks;
while (cacheBlock) {
// Store glyph in this block iff: it fits the block's remaining space and:
// it's the remainder space (mY == 0) or there's only enough height for this one glyph
// or it's within ROUNDING_SIZE of the block width
if (roundedUpW <= cacheBlock->mWidth && glyphH <= cacheBlock->mHeight &&
(cacheBlock->mY == TEXTURE_BORDER_SIZE ||
(cacheBlock->mWidth - roundedUpW < CACHE_BLOCK_ROUNDING_SIZE))) {
if (cacheBlock->mHeight - glyphH < glyphH) {
// Only enough space for this glyph - don't bother rounding up the width
roundedUpW = glyphW;
}
*retOriginX = cacheBlock->mX;
*retOriginY = cacheBlock->mY;
// If this is the remainder space, create a new cache block for this column. Otherwise,
// adjust the info about this column.
if (cacheBlock->mY == TEXTURE_BORDER_SIZE) {
uint16_t oldX = cacheBlock->mX;
// Adjust remainder space dimensions
cacheBlock->mWidth -= roundedUpW;
cacheBlock->mX += roundedUpW;
if (mHeight - glyphH >= glyphH) {
// There's enough height left over to create a new CacheBlock
CacheBlock *newBlock = new CacheBlock(oldX, glyphH + TEXTURE_BORDER_SIZE,
roundedUpW, mHeight - glyphH - TEXTURE_BORDER_SIZE);
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: Created new block: this, x, y, w, h = %p, %d, %d, %d, %d",
newBlock, newBlock->mX, newBlock->mY,
newBlock->mWidth, newBlock->mHeight);
#endif
mCacheBlocks = CacheBlock::insertBlock(mCacheBlocks, newBlock);
}
} else {
// Insert into current column and adjust column dimensions
cacheBlock->mY += glyphH;
cacheBlock->mHeight -= glyphH;
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: Added to existing block: this, x, y, w, h = %p, %d, %d, %d, %d",
cacheBlock, cacheBlock->mX, cacheBlock->mY,
cacheBlock->mWidth, cacheBlock->mHeight);
#endif
}
if (cacheBlock->mHeight < fmin(glyphH, glyphW)) {
// If remaining space in this block is too small to be useful, remove it
mCacheBlocks = CacheBlock::removeBlock(mCacheBlocks, cacheBlock);
}
mDirty = true;
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: current block list:");
mCacheBlocks->output();
#endif
++mNumGlyphs;
return true;
}
cacheBlock = cacheBlock->mNext;
}
#if DEBUG_FONT_RENDERER
ALOGD("fitBitmap: returning false for glyph of size %d, %d", glyphW, glyphH);
#endif
return false;
}
}; // namespace uirenderer
}; // namespace android

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_CACHE_TEXTURE_H
#define ANDROID_HWUI_CACHE_TEXTURE_H
#include <GLES2/gl2.h>
#include <SkScalerContext.h>
#include <utils/Log.h>
#include "FontUtil.h"
namespace android {
namespace uirenderer {
/**
* CacheBlock is a node in a linked list of current free space areas in a CacheTexture.
* Using CacheBlocks enables us to pack the cache from top to bottom as well as left to right.
* When we add a glyph to the cache, we see if it fits within one of the existing columns that
* have already been started (this is the case if the glyph fits vertically as well as
* horizontally, and if its width is sufficiently close to the column width to avoid
* sub-optimal packing of small glyphs into wide columns). If there is no column in which the
* glyph fits, we check the final node, which is the remaining space in the cache, creating
* a new column as appropriate.
*
* As columns fill up, we remove their CacheBlock from the list to avoid having to check
* small blocks in the future.
*/
struct CacheBlock {
uint16_t mX;
uint16_t mY;
uint16_t mWidth;
uint16_t mHeight;
CacheBlock* mNext;
CacheBlock* mPrev;
CacheBlock(uint16_t x, uint16_t y, uint16_t width, uint16_t height, bool empty = false):
mX(x), mY(y), mWidth(width), mHeight(height), mNext(NULL), mPrev(NULL)
{
}
static CacheBlock* insertBlock(CacheBlock* head, CacheBlock *newBlock);
static CacheBlock* removeBlock(CacheBlock* head, CacheBlock *blockToRemove);
void output() {
CacheBlock *currBlock = this;
while (currBlock) {
ALOGD("Block: this, x, y, w, h = %p, %d, %d, %d, %d",
currBlock, currBlock->mX, currBlock->mY, currBlock->mWidth, currBlock->mHeight);
currBlock = currBlock->mNext;
}
}
};
class CacheTexture {
public:
CacheTexture(uint16_t width, uint16_t height) :
mTexture(NULL), mTextureId(0), mWidth(width), mHeight(height),
mLinearFiltering(false), mDirty(false), mNumGlyphs(0) {
mCacheBlocks = new CacheBlock(TEXTURE_BORDER_SIZE, TEXTURE_BORDER_SIZE,
mWidth - TEXTURE_BORDER_SIZE, mHeight - TEXTURE_BORDER_SIZE, true);
}
~CacheTexture() {
if (mTexture) {
delete[] mTexture;
}
if (mTextureId) {
glDeleteTextures(1, &mTextureId);
}
reset();
}
void reset() {
// Delete existing cache blocks
while (mCacheBlocks != NULL) {
CacheBlock* tmpBlock = mCacheBlocks;
mCacheBlocks = mCacheBlocks->mNext;
delete tmpBlock;
}
mNumGlyphs = 0;
}
void init() {
// reset, then create a new remainder space to start again
reset();
mCacheBlocks = new CacheBlock(TEXTURE_BORDER_SIZE, TEXTURE_BORDER_SIZE,
mWidth - TEXTURE_BORDER_SIZE, mHeight - TEXTURE_BORDER_SIZE, true);
}
bool fitBitmap(const SkGlyph& glyph, uint32_t *retOriginX, uint32_t *retOriginY);
uint8_t* mTexture;
GLuint mTextureId;
uint16_t mWidth;
uint16_t mHeight;
bool mLinearFiltering;
bool mDirty;
uint16_t mNumGlyphs;
CacheBlock* mCacheBlocks;
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_CACHE_TEXTURE_H

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_CACHED_GLYPH_INFO_H
#define ANDROID_HWUI_CACHED_GLYPH_INFO_H
#include <SkFixed.h>
#include "CacheTexture.h"
namespace android {
namespace uirenderer {
struct CachedGlyphInfo {
// Has the cache been invalidated?
bool mIsValid;
// Location of the cached glyph in the bitmap
// in case we need to resize the texture or
// render to bitmap
uint32_t mStartX;
uint32_t mStartY;
uint32_t mBitmapWidth;
uint32_t mBitmapHeight;
// Also cache texture coords for the quad
float mBitmapMinU;
float mBitmapMinV;
float mBitmapMaxU;
float mBitmapMaxV;
// Minimize how much we call freetype
uint32_t mGlyphIndex;
uint32_t mAdvanceX;
uint32_t mAdvanceY;
// Values below contain a glyph's origin in the bitmap
int32_t mBitmapLeft;
int32_t mBitmapTop;
// Auto-kerning
SkFixed mLsbDelta;
SkFixed mRsbDelta;
CacheTexture* mCacheTexture;
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_CACHED_GLYPH_INFO_H

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cutils/compiler.h>
#include <SkUtils.h>
#include "Debug.h"
#include "FontUtil.h"
#include "Font.h"
#include "FontRenderer.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Font
///////////////////////////////////////////////////////////////////////////////
Font::Font(FontRenderer* state, uint32_t fontId, float fontSize,
int flags, uint32_t italicStyle, uint32_t scaleX,
SkPaint::Style style, uint32_t strokeWidth) :
mState(state), mFontId(fontId), mFontSize(fontSize),
mFlags(flags), mItalicStyle(italicStyle), mScaleX(scaleX),
mStyle(style), mStrokeWidth(mStrokeWidth) {
}
Font::~Font() {
for (uint32_t ct = 0; ct < mState->mActiveFonts.size(); ct++) {
if (mState->mActiveFonts[ct] == this) {
mState->mActiveFonts.removeAt(ct);
break;
}
}
for (uint32_t i = 0; i < mCachedGlyphs.size(); i++) {
delete mCachedGlyphs.valueAt(i);
}
}
void Font::invalidateTextureCache(CacheTexture *cacheTexture) {
for (uint32_t i = 0; i < mCachedGlyphs.size(); i++) {
CachedGlyphInfo* cachedGlyph = mCachedGlyphs.valueAt(i);
if (cacheTexture == NULL || cachedGlyph->mCacheTexture == cacheTexture) {
cachedGlyph->mIsValid = false;
}
}
}
void Font::measureCachedGlyph(CachedGlyphInfo *glyph, int x, int y,
uint8_t* bitmap, uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* pos) {
int nPenX = x + glyph->mBitmapLeft;
int nPenY = y + glyph->mBitmapTop;
int width = (int) glyph->mBitmapWidth;
int height = (int) glyph->mBitmapHeight;
if (bounds->bottom > nPenY) {
bounds->bottom = nPenY;
}
if (bounds->left > nPenX) {
bounds->left = nPenX;
}
if (bounds->right < nPenX + width) {
bounds->right = nPenX + width;
}
if (bounds->top < nPenY + height) {
bounds->top = nPenY + height;
}
}
void Font::drawCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t* bitmap, uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* pos) {
int nPenX = x + glyph->mBitmapLeft;
int nPenY = y + glyph->mBitmapTop + glyph->mBitmapHeight;
float u1 = glyph->mBitmapMinU;
float u2 = glyph->mBitmapMaxU;
float v1 = glyph->mBitmapMinV;
float v2 = glyph->mBitmapMaxV;
int width = (int) glyph->mBitmapWidth;
int height = (int) glyph->mBitmapHeight;
mState->appendMeshQuad(nPenX, nPenY, u1, v2,
nPenX + width, nPenY, u2, v2,
nPenX + width, nPenY - height, u2, v1,
nPenX, nPenY - height, u1, v1, glyph->mCacheTexture);
}
void Font::drawCachedGlyphBitmap(CachedGlyphInfo* glyph, int x, int y,
uint8_t* bitmap, uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* pos) {
int nPenX = x + glyph->mBitmapLeft;
int nPenY = y + glyph->mBitmapTop;
uint32_t endX = glyph->mStartX + glyph->mBitmapWidth;
uint32_t endY = glyph->mStartY + glyph->mBitmapHeight;
CacheTexture *cacheTexture = glyph->mCacheTexture;
uint32_t cacheWidth = cacheTexture->mWidth;
const uint8_t* cacheBuffer = cacheTexture->mTexture;
uint32_t cacheX = 0, cacheY = 0;
int32_t bX = 0, bY = 0;
for (cacheX = glyph->mStartX, bX = nPenX; cacheX < endX; cacheX++, bX++) {
for (cacheY = glyph->mStartY, bY = nPenY; cacheY < endY; cacheY++, bY++) {
#if DEBUG_FONT_RENDERER
if (bX < 0 || bY < 0 || bX >= (int32_t) bitmapW || bY >= (int32_t) bitmapH) {
ALOGE("Skipping invalid index");
continue;
}
#endif
uint8_t tempCol = cacheBuffer[cacheY * cacheWidth + cacheX];
bitmap[bY * bitmapW + bX] = tempCol;
}
}
}
void Font::drawCachedGlyph(CachedGlyphInfo* glyph, float x, float hOffset, float vOffset,
SkPathMeasure& measure, SkPoint* position, SkVector* tangent) {
const float halfWidth = glyph->mBitmapWidth * 0.5f;
const float height = glyph->mBitmapHeight;
vOffset += glyph->mBitmapTop + height;
SkPoint destination[4];
measure.getPosTan(x + hOffset + glyph->mBitmapLeft + halfWidth, position, tangent);
// Move along the tangent and offset by the normal
destination[0].set(-tangent->fX * halfWidth - tangent->fY * vOffset,
-tangent->fY * halfWidth + tangent->fX * vOffset);
destination[1].set(tangent->fX * halfWidth - tangent->fY * vOffset,
tangent->fY * halfWidth + tangent->fX * vOffset);
destination[2].set(destination[1].fX + tangent->fY * height,
destination[1].fY - tangent->fX * height);
destination[3].set(destination[0].fX + tangent->fY * height,
destination[0].fY - tangent->fX * height);
const float u1 = glyph->mBitmapMinU;
const float u2 = glyph->mBitmapMaxU;
const float v1 = glyph->mBitmapMinV;
const float v2 = glyph->mBitmapMaxV;
mState->appendRotatedMeshQuad(
position->fX + destination[0].fX,
position->fY + destination[0].fY, u1, v2,
position->fX + destination[1].fX,
position->fY + destination[1].fY, u2, v2,
position->fX + destination[2].fX,
position->fY + destination[2].fY, u2, v1,
position->fX + destination[3].fX,
position->fY + destination[3].fY, u1, v1,
glyph->mCacheTexture);
}
CachedGlyphInfo* Font::getCachedGlyph(SkPaint* paint, glyph_t textUnit, bool precaching) {
CachedGlyphInfo* cachedGlyph = NULL;
ssize_t index = mCachedGlyphs.indexOfKey(textUnit);
if (index >= 0) {
cachedGlyph = mCachedGlyphs.valueAt(index);
} else {
cachedGlyph = cacheGlyph(paint, textUnit, precaching);
}
// Is the glyph still in texture cache?
if (!cachedGlyph->mIsValid) {
const SkGlyph& skiaGlyph = GET_METRICS(paint, textUnit);
updateGlyphCache(paint, skiaGlyph, cachedGlyph, precaching);
}
return cachedGlyph;
}
void Font::render(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH) {
if (bitmap != NULL && bitmapW > 0 && bitmapH > 0) {
render(paint, text, start, len, numGlyphs, x, y, BITMAP, bitmap,
bitmapW, bitmapH, NULL, NULL);
} else {
render(paint, text, start, len, numGlyphs, x, y, FRAMEBUFFER, NULL,
0, 0, NULL, NULL);
}
}
void Font::render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, const float* positions) {
render(paint, text, start, len, numGlyphs, x, y, FRAMEBUFFER, NULL,
0, 0, NULL, positions);
}
void Font::render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, SkPath* path, float hOffset, float vOffset) {
if (numGlyphs == 0 || text == NULL || len == 0) {
return;
}
text += start;
int glyphsCount = 0;
SkFixed prevRsbDelta = 0;
float penX = 0.0f;
SkPoint position;
SkVector tangent;
SkPathMeasure measure(*path, false);
float pathLength = SkScalarToFloat(measure.getLength());
if (paint->getTextAlign() != SkPaint::kLeft_Align) {
float textWidth = SkScalarToFloat(paint->measureText(text, len));
float pathOffset = pathLength;
if (paint->getTextAlign() == SkPaint::kCenter_Align) {
textWidth *= 0.5f;
pathOffset *= 0.5f;
}
penX += pathOffset - textWidth;
}
while (glyphsCount < numGlyphs && penX < pathLength) {
glyph_t glyph = GET_GLYPH(text);
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
penX += SkFixedToFloat(AUTO_KERN(prevRsbDelta, cachedGlyph->mLsbDelta));
prevRsbDelta = cachedGlyph->mRsbDelta;
if (cachedGlyph->mIsValid) {
drawCachedGlyph(cachedGlyph, penX, hOffset, vOffset, measure, &position, &tangent);
}
penX += SkFixedToFloat(cachedGlyph->mAdvanceX);
glyphsCount++;
}
}
void Font::measure(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, Rect *bounds, const float* positions) {
if (bounds == NULL) {
ALOGE("No return rectangle provided to measure text");
return;
}
bounds->set(1e6, -1e6, -1e6, 1e6);
render(paint, text, start, len, numGlyphs, 0, 0, MEASURE, NULL, 0, 0, bounds, positions);
}
void Font::precache(SkPaint* paint, const char* text, int numGlyphs) {
if (numGlyphs == 0 || text == NULL) {
return;
}
int glyphsCount = 0;
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph, true);
glyphsCount++;
}
}
void Font::render(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, RenderMode mode, uint8_t *bitmap,
uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* positions) {
if (numGlyphs == 0 || text == NULL || len == 0) {
return;
}
static RenderGlyph gRenderGlyph[] = {
&android::uirenderer::Font::drawCachedGlyph,
&android::uirenderer::Font::drawCachedGlyphBitmap,
&android::uirenderer::Font::measureCachedGlyph
};
RenderGlyph render = gRenderGlyph[mode];
text += start;
int glyphsCount = 0;
if (CC_LIKELY(positions == NULL)) {
SkFixed prevRsbDelta = 0;
float penX = x + 0.5f;
int penY = y;
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
penX += SkFixedToFloat(AUTO_KERN(prevRsbDelta, cachedGlyph->mLsbDelta));
prevRsbDelta = cachedGlyph->mRsbDelta;
// If it's still not valid, we couldn't cache it, so we shouldn't draw garbage
if (cachedGlyph->mIsValid) {
(*this.*render)(cachedGlyph, (int) floorf(penX), penY,
bitmap, bitmapW, bitmapH, bounds, positions);
}
penX += SkFixedToFloat(cachedGlyph->mAdvanceX);
glyphsCount++;
}
} else {
const SkPaint::Align align = paint->getTextAlign();
// This is for renderPosText()
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
// If it's still not valid, we couldn't cache it, so we shouldn't draw garbage
if (cachedGlyph->mIsValid) {
int penX = x + positions[(glyphsCount << 1)];
int penY = y + positions[(glyphsCount << 1) + 1];
switch (align) {
case SkPaint::kRight_Align:
penX -= SkFixedToFloat(cachedGlyph->mAdvanceX);
penY -= SkFixedToFloat(cachedGlyph->mAdvanceY);
break;
case SkPaint::kCenter_Align:
penX -= SkFixedToFloat(cachedGlyph->mAdvanceX >> 1);
penY -= SkFixedToFloat(cachedGlyph->mAdvanceY >> 1);
default:
break;
}
(*this.*render)(cachedGlyph, penX, penY,
bitmap, bitmapW, bitmapH, bounds, positions);
}
glyphsCount++;
}
}
}
void Font::updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyphInfo* glyph,
bool precaching) {
glyph->mAdvanceX = skiaGlyph.fAdvanceX;
glyph->mAdvanceY = skiaGlyph.fAdvanceY;
glyph->mBitmapLeft = skiaGlyph.fLeft;
glyph->mBitmapTop = skiaGlyph.fTop;
glyph->mLsbDelta = skiaGlyph.fLsbDelta;
glyph->mRsbDelta = skiaGlyph.fRsbDelta;
uint32_t startX = 0;
uint32_t startY = 0;
// Get the bitmap for the glyph
paint->findImage(skiaGlyph);
mState->cacheBitmap(skiaGlyph, glyph, &startX, &startY, precaching);
if (!glyph->mIsValid) {
return;
}
uint32_t endX = startX + skiaGlyph.fWidth;
uint32_t endY = startY + skiaGlyph.fHeight;
glyph->mStartX = startX;
glyph->mStartY = startY;
glyph->mBitmapWidth = skiaGlyph.fWidth;
glyph->mBitmapHeight = skiaGlyph.fHeight;
uint32_t cacheWidth = glyph->mCacheTexture->mWidth;
uint32_t cacheHeight = glyph->mCacheTexture->mHeight;
glyph->mBitmapMinU = startX / (float) cacheWidth;
glyph->mBitmapMinV = startY / (float) cacheHeight;
glyph->mBitmapMaxU = endX / (float) cacheWidth;
glyph->mBitmapMaxV = endY / (float) cacheHeight;
mState->mUploadTexture = true;
}
CachedGlyphInfo* Font::cacheGlyph(SkPaint* paint, glyph_t glyph, bool precaching) {
CachedGlyphInfo* newGlyph = new CachedGlyphInfo();
mCachedGlyphs.add(glyph, newGlyph);
const SkGlyph& skiaGlyph = GET_METRICS(paint, glyph);
newGlyph->mGlyphIndex = skiaGlyph.fID;
newGlyph->mIsValid = false;
updateGlyphCache(paint, skiaGlyph, newGlyph, precaching);
return newGlyph;
}
Font* Font::create(FontRenderer* state, uint32_t fontId, float fontSize,
int flags, uint32_t italicStyle, uint32_t scaleX,
SkPaint::Style style, uint32_t strokeWidth) {
Vector<Font*> &activeFonts = state->mActiveFonts;
for (uint32_t i = 0; i < activeFonts.size(); i++) {
Font* font = activeFonts[i];
if (font->mFontId == fontId && font->mFontSize == fontSize &&
font->mFlags == flags && font->mItalicStyle == italicStyle &&
font->mScaleX == scaleX && font->mStyle == style &&
(style == SkPaint::kFill_Style || font->mStrokeWidth == strokeWidth)) {
return font;
}
}
Font* newFont = new Font(state, fontId, fontSize, flags, italicStyle,
scaleX, style, strokeWidth);
activeFonts.push(newFont);
return newFont;
}
}; // namespace uirenderer
}; // namespace android

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_FONT_H
#define ANDROID_HWUI_FONT_H
#include <utils/KeyedVector.h>
#include <SkScalerContext.h>
#include <SkPaint.h>
#include <SkPathMeasure.h>
#include "CachedGlyphInfo.h"
#include "../Rect.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Font
///////////////////////////////////////////////////////////////////////////////
class FontRenderer;
/**
* Represents a font, defined by a Skia font id and a font size. A font is used
* to generate glyphs and cache them in the FontState.
*/
class Font {
public:
enum Style {
kFakeBold = 1
};
~Font();
/**
* Renders the specified string of text.
* If bitmap is specified, it will be used as the render target
*/
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, uint8_t *bitmap = NULL,
uint32_t bitmapW = 0, uint32_t bitmapH = 0);
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, const float* positions);
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, SkPath* path, float hOffset, float vOffset);
/**
* Creates a new font associated with the specified font state.
*/
static Font* create(FontRenderer* state, uint32_t fontId, float fontSize,
int flags, uint32_t italicStyle, uint32_t scaleX, SkPaint::Style style,
uint32_t strokeWidth);
private:
friend class FontRenderer;
typedef void (Font::*RenderGlyph)(CachedGlyphInfo*, int, int, uint8_t*,
uint32_t, uint32_t, Rect*, const float*);
enum RenderMode {
FRAMEBUFFER,
BITMAP,
MEASURE,
};
void precache(SkPaint* paint, const char* text, int numGlyphs);
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, RenderMode mode, uint8_t *bitmap,
uint32_t bitmapW, uint32_t bitmapH, Rect *bounds, const float* positions);
void measure(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, Rect *bounds, const float* positions);
Font(FontRenderer* state, uint32_t fontId, float fontSize, int flags, uint32_t italicStyle,
uint32_t scaleX, SkPaint::Style style, uint32_t strokeWidth);
// Cache of glyphs
DefaultKeyedVector<glyph_t, CachedGlyphInfo*> mCachedGlyphs;
void invalidateTextureCache(CacheTexture *cacheTexture = NULL);
CachedGlyphInfo* cacheGlyph(SkPaint* paint, glyph_t glyph, bool precaching);
void updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyphInfo* glyph,
bool precaching);
void measureCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyphBitmap(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyph(CachedGlyphInfo* glyph, float x, float hOffset, float vOffset,
SkPathMeasure& measure, SkPoint* position, SkVector* tangent);
CachedGlyphInfo* getCachedGlyph(SkPaint* paint, glyph_t textUnit, bool precaching = false);
FontRenderer* mState;
uint32_t mFontId;
float mFontSize;
int mFlags;
uint32_t mItalicStyle;
uint32_t mScaleX;
SkPaint::Style mStyle;
uint32_t mStrokeWidth;
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_FONT_H

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_FONT_UTIL_H
#define ANDROID_HWUI_FONT_UTIL_H
#include <SkUtils.h>
#include "Properties.h"
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
#define DEFAULT_TEXT_SMALL_CACHE_WIDTH 1024
#define DEFAULT_TEXT_SMALL_CACHE_HEIGHT 256
#define DEFAULT_TEXT_LARGE_CACHE_WIDTH 2048
#define DEFAULT_TEXT_LARGE_CACHE_HEIGHT 512
#define TEXTURE_BORDER_SIZE 1
#define CACHE_BLOCK_ROUNDING_SIZE 4
#if RENDER_TEXT_AS_GLYPHS
typedef uint16_t glyph_t;
#define TO_GLYPH(g) g
#define GET_METRICS(paint, glyph) paint->getGlyphMetrics(glyph)
#define GET_GLYPH(text) nextGlyph((const uint16_t**) &text)
#define IS_END_OF_STRING(glyph) false
static glyph_t nextGlyph(const uint16_t** srcPtr) {
const uint16_t* src = *srcPtr;
glyph_t g = *src++;
*srcPtr = src;
return g;
}
#else
typedef SkUnichar glyph_t;
#define TO_GLYPH(g) ((SkUnichar) g)
#define GET_METRICS(paint, glyph) paint->getUnicharMetrics(glyph)
#define GET_GLYPH(text) SkUTF16_NextUnichar((const uint16_t**) &text)
#define IS_END_OF_STRING(glyph) glyph < 0
#endif
#define AUTO_KERN(prev, next) (((next) - (prev) + 32) >> 6 << 16)
#endif // ANDROID_HWUI_FONT_UTIL_H