Adding text metrics to renderscript.
Change-Id: Ica460525243d714a278e4ad5e436af43e1008e0c
diff --git a/rsFont.cpp b/rsFont.cpp
index c516ea9..cc2b76a 100644
--- a/rsFont.cpp
+++ b/rsFont.cpp
@@ -84,34 +84,95 @@
}
}
-void Font::drawCachedGlyph(CachedGlyphInfo *glyph, int x, int y)
+void Font::drawCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y)
{
FontState *state = &mRSC->mStateFont;
- int nPenX = x + glyph->mBitmapLeft;
- int nPenY = y - glyph->mBitmapTop + glyph->mBitmapHeight;
+ int32_t nPenX = x + glyph->mBitmapLeft;
+ int32_t nPenY = y - glyph->mBitmapTop + glyph->mBitmapHeight;
- state->appendMeshQuad(nPenX, nPenY, 0,
- glyph->mBitmapMinU, glyph->mBitmapMaxV,
+ float u1 = glyph->mBitmapMinU;
+ float u2 = glyph->mBitmapMaxU;
+ float v1 = glyph->mBitmapMinV;
+ float v2 = glyph->mBitmapMaxV;
- nPenX + (int)glyph->mBitmapWidth, nPenY, 0,
- glyph->mBitmapMaxU, glyph->mBitmapMaxV,
+ int32_t width = (int32_t) glyph->mBitmapWidth;
+ int32_t height = (int32_t) glyph->mBitmapHeight;
- nPenX + (int)glyph->mBitmapWidth, nPenY - (int)glyph->mBitmapHeight, 0,
- glyph->mBitmapMaxU, glyph->mBitmapMinV,
-
- nPenX, nPenY - (int)glyph->mBitmapHeight, 0,
- glyph->mBitmapMinU, glyph->mBitmapMinV);
+ state->appendMeshQuad(nPenX, nPenY, 0, u1, v2,
+ nPenX + width, nPenY, 0, u2, v2,
+ nPenX + width, nPenY - height, 0, u2, v1,
+ nPenX, nPenY - height, 0, u1, v1);
}
-void Font::renderUTF(const char *text, uint32_t len, uint32_t start, int numGlyphs, int x, int y)
+void Font::drawCachedGlyph(CachedGlyphInfo* glyph, int32_t x, int32_t y,
+ uint8_t* bitmap, uint32_t bitmapW, uint32_t bitmapH) {
+ int32_t nPenX = x + glyph->mBitmapLeft;
+ int32_t nPenY = y + glyph->mBitmapTop;
+
+ uint32_t endX = glyph->mBitmapMinX + glyph->mBitmapWidth;
+ uint32_t endY = glyph->mBitmapMinY + glyph->mBitmapHeight;
+
+ FontState *state = &mRSC->mStateFont;
+ uint32_t cacheWidth = state->getCacheTextureType()->getDimX();
+ const uint8_t* cacheBuffer = state->getTextTextureData();
+
+ uint32_t cacheX = 0, cacheY = 0;
+ int32_t bX = 0, bY = 0;
+ for (cacheX = glyph->mBitmapMinX, bX = nPenX; cacheX < endX; cacheX++, bX++) {
+ for (cacheY = glyph->mBitmapMinY, bY = nPenY; cacheY < endY; cacheY++, bY++) {
+ if (bX < 0 || bY < 0 || bX >= (int32_t) bitmapW || bY >= (int32_t) bitmapH) {
+ LOGE("Skipping invalid index");
+ continue;
+ }
+ uint8_t tempCol = cacheBuffer[cacheY * cacheWidth + cacheX];
+ bitmap[bY * bitmapW + bX] = tempCol;
+ }
+ }
+
+}
+
+void Font::measureCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y, Rect *bounds) {
+ int32_t nPenX = x + glyph->mBitmapLeft;
+ int32_t nPenY = y - glyph->mBitmapTop + glyph->mBitmapHeight;
+
+ int32_t width = (int32_t) glyph->mBitmapWidth;
+ int32_t height = (int32_t) 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::renderUTF(const char *text, uint32_t len, int32_t x, int32_t y,
+ uint32_t start, int32_t numGlyphs,
+ RenderMode mode, Rect *bounds,
+ uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH)
{
if(!mInitialized || numGlyphs == 0 || text == NULL || len == 0) {
return;
}
- int penX = x, penY = y;
- int glyphsLeft = 1;
+ if(mode == Font::MEASURE) {
+ if (bounds == NULL) {
+ LOGE("No return rectangle provided to measure text");
+ return;
+ }
+ // Reset min and max of the bounding box to something large
+ bounds->set(1e6, -1e6, -1e6, 1e6);
+ }
+
+ int32_t penX = x, penY = y;
+ int32_t glyphsLeft = 1;
if(numGlyphs > 0) {
glyphsLeft = numGlyphs;
}
@@ -135,7 +196,17 @@
// If it's still not valid, we couldn't cache it, so we shouldn't draw garbage
if(cachedGlyph->mIsValid) {
- drawCachedGlyph(cachedGlyph, penX, penY);
+ switch(mode) {
+ case FRAMEBUFFER:
+ drawCachedGlyph(cachedGlyph, penX, penY);
+ break;
+ case BITMAP:
+ drawCachedGlyph(cachedGlyph, penX, penY, bitmap, bitmapW, bitmapH);
+ break;
+ case MEASURE:
+ measureCachedGlyph(cachedGlyph, penX, penY, bounds);
+ break;
+ }
}
penX += (cachedGlyph->mAdvance.x >> 6);
@@ -283,7 +354,7 @@
}
// Get the black gamma threshold
- int blackThreshold = DEFAULT_TEXT_BLACK_GAMMA_THRESHOLD;
+ int32_t blackThreshold = DEFAULT_TEXT_BLACK_GAMMA_THRESHOLD;
if (property_get(PROPERTY_TEXT_BLACK_GAMMA_THRESHOLD, property, NULL) > 0) {
LOGD(" Setting text black gamma threshold to %s", property);
blackThreshold = atoi(property);
@@ -294,7 +365,7 @@
mBlackThreshold = (float)(blackThreshold) / 255.0f;
// Get the white gamma threshold
- int whiteThreshold = DEFAULT_TEXT_WHITE_GAMMA_THRESHOLD;
+ int32_t whiteThreshold = DEFAULT_TEXT_WHITE_GAMMA_THRESHOLD;
if (property_get(PROPERTY_TEXT_WHITE_GAMMA_THRESHOLD, property, NULL) > 0) {
LOGD(" Setting text white gamma threshold to %s", property);
whiteThreshold = atoi(property);
@@ -397,13 +468,13 @@
uint32_t cacheWidth = getCacheTextureType()->getDimX();
- unsigned char *cacheBuffer = (unsigned char*)mTextTexture->getPtr();
- unsigned char *bitmapBuffer = bitmap->buffer;
+ uint8_t *cacheBuffer = (uint8_t*)mTextTexture->getPtr();
+ uint8_t *bitmapBuffer = bitmap->buffer;
uint32_t cacheX = 0, bX = 0, cacheY = 0, bY = 0;
for(cacheX = startX, bX = 0; cacheX < endX; cacheX ++, bX ++) {
for(cacheY = startY, bY = 0; cacheY < endY; cacheY ++, bY ++) {
- unsigned char tempCol = bitmapBuffer[bY * bitmap->width + bX];
+ uint8_t tempCol = bitmapBuffer[bY * bitmap->width + bX];
cacheBuffer[cacheY*cacheWidth + cacheX] = tempCol;
}
}
@@ -487,7 +558,7 @@
mTextTexture->deferedUploadToTexture(mRSC, false, 0);
// Split up our cache texture into lines of certain widths
- int nextLine = 0;
+ int32_t nextLine = 0;
mCacheLines.push(new CacheTextureLine(16, texType->getDimX(), nextLine, 0));
nextLine += mCacheLines.top()->mMaxHeight;
mCacheLines.push(new CacheTextureLine(24, texType->getDimX(), nextLine, 0));
@@ -519,8 +590,8 @@
// Four verts, two triangles , six indices per quad
for(uint32_t i = 0; i < mMaxNumberOfQuads; i ++) {
- int i6 = i * 6;
- int i4 = i * 4;
+ int32_t i6 = i * 6;
+ int32_t i4 = i * 4;
indexPtr[i6 + 0] = i4 + 0;
indexPtr[i6 + 1] = i4 + 1;
@@ -713,7 +784,11 @@
}
-void FontState::renderText(const char *text, uint32_t len, uint32_t startIndex, int numGlyphs, int x, int y)
+void FontState::renderText(const char *text, uint32_t len, int32_t x, int32_t y,
+ uint32_t startIndex, int32_t numGlyphs,
+ Font::RenderMode mode,
+ Font::Rect *bounds,
+ uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH)
{
checkInit();
@@ -730,7 +805,8 @@
return;
}
- currentFont->renderUTF(text, len, startIndex, numGlyphs, x, y);
+ currentFont->renderUTF(text, len, x, y, startIndex, numGlyphs,
+ mode, bounds, bitmap, bitmapW, bitmapH);
if(mCurrentQuadIndex != 0) {
issueDrawCommand();
@@ -738,32 +814,8 @@
}
}
-void FontState::renderText(const char *text, int x, int y)
-{
- size_t textLen = strlen(text);
- renderText(text, textLen, 0, -1, x, y);
-}
-
-void FontState::renderText(Allocation *alloc, int x, int y)
-{
- if(!alloc) {
- return;
- }
-
- const char *text = (const char *)alloc->getPtr();
- size_t allocSize = alloc->getType()->getSizeBytes();
- renderText(text, allocSize, 0, -1, x, y);
-}
-
-void FontState::renderText(Allocation *alloc, uint32_t start, int len, int x, int y)
-{
- if(!alloc) {
- return;
- }
-
- const char *text = (const char *)alloc->getPtr();
- size_t allocSize = alloc->getType()->getSizeBytes();
- renderText(text, allocSize, start, len, x, y);
+void FontState::measureText(const char *text, uint32_t len, Font::Rect *bounds) {
+ renderText(text, len, 0, 0, 0, -1, Font::MEASURE, bounds);
}
void FontState::setFontColor(float r, float g, float b, float a) {
@@ -773,7 +825,7 @@
mConstants.mFontColor[3] = a;
mConstants.mGamma = 1.0f;
- const int luminance = (r * 2.0f + g * 5.0f + b) / 8.0f;
+ const int32_t luminance = (r * 2.0f + g * 5.0f + b) / 8.0f;
if (luminance <= mBlackThreshold) {
mConstants.mGamma = mBlackGamma;
} else if (luminance >= mWhiteThreshold) {
