Adding text metrics to renderscript.
Change-Id: Ica460525243d714a278e4ad5e436af43e1008e0c
diff --git a/java/Samples/src/com/android/samples/RsRenderStatesRS.java b/java/Samples/src/com/android/samples/RsRenderStatesRS.java
index a15c4a1..0990da3 100644
--- a/java/Samples/src/com/android/samples/RsRenderStatesRS.java
+++ b/java/Samples/src/com/android/samples/RsRenderStatesRS.java
@@ -84,8 +84,6 @@
private Allocation mTexTransparent;
private Allocation mTexChecker;
- private Allocation mAllocPV;
-
private Mesh mMbyNMesh;
private Mesh mTorus;
@@ -95,7 +93,6 @@
Font mFontSerifItalic;
Font mFontSerifBoldItalic;
Font mFontMono;
-
private Allocation mTextAlloc;
private ScriptC_rsrenderstates mScript;
@@ -267,12 +264,15 @@
mFontSerifBoldItalic = Font.createFromFamily(mRS, mRes, "serif", Font.Style.BOLD_ITALIC, 8);
mFontMono = Font.createFromFamily(mRS, mRes, "mono", Font.Style.NORMAL, 8);
+ mTextAlloc = Allocation.createFromString(mRS, "String from allocation");
+
mScript.set_gFontSans(mFontSans);
mScript.set_gFontSerif(mFontSerif);
mScript.set_gFontSerifBold(mFontSerifBold);
mScript.set_gFontSerifItalic(mFontSerifItalic);
mScript.set_gFontSerifBoldItalic(mFontSerifBoldItalic);
mScript.set_gFontMono(mFontMono);
+ mScript.set_gTextAlloc(mTextAlloc);
}
private void initMesh() {
diff --git a/java/Samples/src/com/android/samples/rsrenderstates.rs b/java/Samples/src/com/android/samples/rsrenderstates.rs
index b471504..77384ef 100644
--- a/java/Samples/src/com/android/samples/rsrenderstates.rs
+++ b/java/Samples/src/com/android/samples/rsrenderstates.rs
@@ -42,6 +42,7 @@
rs_font gFontSerifItalic;
rs_font gFontSerifBoldItalic;
rs_font gFontMono;
+rs_allocation gTextAlloc;
int gDisplayMode;
@@ -70,7 +71,7 @@
#pragma rs export_var(gProgStoreBlendNoneDepth, gProgStoreBlendNone, gProgStoreBlendAlpha, gProgStoreBlendAdd)
#pragma rs export_var(gTexOpaque, gTexTorus, gTexTransparent, gTexChecker)
#pragma rs export_var(gMbyNMesh, gTorusMesh)
-#pragma rs export_var(gFontSans, gFontSerif, gFontSerifBold, gFontSerifItalic, gFontSerifBoldItalic, gFontMono)
+#pragma rs export_var(gFontSans, gFontSerif, gFontSerifBold, gFontSerifItalic, gFontSerifBoldItalic, gFontMono, gTextAlloc)
#pragma rs export_var(gLinearClamp, gLinearWrap, gMipLinearWrap, gMipLinearAniso8, gMipLinearAniso15, gNearestClamp)
#pragma rs export_var(gCullBack, gCullFront, gCullNone)
#pragma rs export_var(gVSConstants, gFSConstants, gVSInputs, gProgVertexCustom, gProgFragmentCustom, gProgFragmentMultitex)
@@ -85,7 +86,7 @@
void displayFontSamples() {
rsgFontColor(1.0f, 1.0f, 1.0f, 1.0f);
- int yPos = 30;
+ int yPos = 100;
rsgBindFont(gFontSans);
rsgDrawText("Sans font sample", 30, yPos);
yPos += 30;
@@ -107,6 +108,47 @@
yPos += 30;
rsgBindFont(gFontMono);
rsgDrawText("Monospace font sample", 30, yPos);
+ yPos += 50;
+
+ // Now use text metrics to center the text
+ uint width = rsgGetWidth();
+ uint height = rsgGetHeight();
+ int left = 0, right = 0, top = 0, bottom = 0;
+
+ rsgFontColor(0.9f, 0.9f, 0.95f, 1.0f);
+ rsgBindFont(gFontSerifBoldItalic);
+
+ rsgMeasureText(gTextAlloc, &left, &right, &top, &bottom);
+ int centeredPos = width / 2 - (right - left) / 2;
+ rsgDrawText(gTextAlloc, centeredPos, yPos);
+ yPos += 30;
+
+ const char* text = "Centered Text Sample";
+ rsgMeasureText(text, &left, &right, &top, &bottom);
+ centeredPos = width / 2 - (right - left) / 2;
+ rsgDrawText(text, centeredPos, yPos);
+ yPos += 30;
+
+ rsgBindFont(gFontSans);
+ text = "More Centered Text Samples";
+ rsgMeasureText(text, &left, &right, &top, &bottom);
+ centeredPos = width / 2 - (right - left) / 2;
+ rsgDrawText(text, centeredPos, yPos);
+ yPos += 30;
+
+ // Now draw bottom and top right aligned text
+ text = "Top-right aligned text";
+ rsgMeasureText(text, &left, &right, &top, &bottom);
+ rsgDrawText(text, width - right, top);
+
+ text = "Top-left";
+ rsgMeasureText(text, &left, &right, &top, &bottom);
+ rsgDrawText(text, -left, top);
+
+ text = "Bottom-right aligned text";
+ rsgMeasureText(text, &left, &right, &top, &bottom);
+ rsgDrawText(text, width - right, height + bottom);
+
}
void bindProgramVertexOrtho() {
diff --git a/rsContext.cpp b/rsContext.cpp
index 6940033..493a092 100644
--- a/rsContext.cpp
+++ b/rsContext.cpp
@@ -258,14 +258,14 @@
sprintf(buffer, "Frame %i ms, Script %i ms", mTimeMSLastFrame, mTimeMSLastScript);
float oldR, oldG, oldB, oldA;
mStateFont.getFontColor(&oldR, &oldG, &oldB, &oldA);
+ uint32_t bufferLen = strlen(buffer);
- float shadowCol = 0.2f;
+ float shadowCol = 0.1f;
mStateFont.setFontColor(shadowCol, shadowCol, shadowCol, 1.0f);
- mStateFont.renderText(buffer, 5, getHeight() - 5);
+ mStateFont.renderText(buffer, bufferLen, 5, getHeight() - 5);
- float textCol = 0.9f;
- mStateFont.setFontColor(textCol, textCol, textCol, 1.0f);
- mStateFont.renderText(buffer, 4, getHeight() - 6);
+ mStateFont.setFontColor(1.0f, 0.7f, 0.0f, 1.0f);
+ mStateFont.renderText(buffer, bufferLen, 4, getHeight() - 6);
mStateFont.setFontColor(oldR, oldG, oldB, oldA);
}
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) {
diff --git a/rsFont.h b/rsFont.h
index 16009ef..0012b84 100644
--- a/rsFont.h
+++ b/rsFont.h
@@ -45,12 +45,26 @@
class Font : public ObjectBase
{
public:
- ~Font();
+ enum RenderMode {
+ FRAMEBUFFER,
+ BITMAP,
+ MEASURE,
+ };
- // Pointer to the utf data, length of data, where to start, number of glyphs ot read
- // (each glyph may be longer than a char because we are dealing with utf data)
- // Last two variables are the initial pen position
- void renderUTF(const char *text, uint32_t len, uint32_t start, int numGlyphs, int x, int y);
+ struct Rect {
+ int32_t left;
+ int32_t top;
+ int32_t right;
+ int32_t bottom;
+ void set(int32_t l, int32_t r, int32_t t, int32_t b) {
+ left = l;
+ right = r;
+ top = t;
+ bottom = b;
+ }
+ };
+
+ ~Font();
// Currently files do not get serialized,
// but we need to inherit from ObjectBase for ref tracking
@@ -66,6 +80,14 @@
friend class FontState;
+ // Pointer to the utf data, length of data, where to start, number of glyphs ot read
+ // (each glyph may be longer than a char because we are dealing with utf data)
+ // Last two variables are the initial pen position
+ void renderUTF(const char *text, uint32_t len, int32_t x, int32_t y,
+ uint32_t start, int32_t numGlyphs,
+ RenderMode mode = FRAMEBUFFER, Rect *bounds = NULL,
+ uint8_t *bitmap = NULL, uint32_t bitmapW = 0, uint32_t bitmapH = 0);
+
void invalidateTextureCache();
struct CachedGlyphInfo
{
@@ -106,7 +128,10 @@
CachedGlyphInfo *cacheGlyph(uint32_t glyph);
void updateGlyphCache(CachedGlyphInfo *glyph);
- void drawCachedGlyph(CachedGlyphInfo *glyph, int x, int y);
+ void measureCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y, Rect *bounds);
+ void drawCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y);
+ void drawCachedGlyph(CachedGlyphInfo *glyph, int32_t x, int32_t y,
+ uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH);
};
class FontState
@@ -121,10 +146,13 @@
ObjectBaseRef<Font> mDefault;
ObjectBaseRef<Font> mLast;
- void renderText(const char *text, uint32_t len, uint32_t startIndex, int numGlyphs, int x, int y);
- void renderText(const char *text, int x, int y);
- void renderText(Allocation *alloc, int x, int y);
- void renderText(Allocation *alloc, uint32_t start, int len, int x, int y);
+ void renderText(const char *text, uint32_t len, int32_t x, int32_t y,
+ uint32_t startIndex = 0, int numGlyphs = -1,
+ Font::RenderMode mode = Font::FRAMEBUFFER,
+ Font::Rect *bounds = NULL,
+ uint8_t *bitmap = NULL, uint32_t bitmapW = 0, uint32_t bitmapH = 0);
+
+ void measureText(const char *text, uint32_t len, Font::Rect *bounds);
void setFontColor(float r, float g, float b, float a);
void getFontColor(float *r, float *g, float *b, float *a) const;
@@ -198,6 +226,9 @@
// Texture to cache glyph bitmaps
ObjectBaseRef<Allocation> mTextTexture;
void initTextTexture();
+ const uint8_t* getTextTextureData() const {
+ return (uint8_t*)mTextTexture->getPtr();
+ }
bool cacheBitmap(FT_Bitmap *bitmap, uint32_t *retOriginX, uint32_t *retOriginY);
const Type* getCacheTextureType() {
diff --git a/rsScriptC_LibGL.cpp b/rsScriptC_LibGL.cpp
index 88db761..b991cab 100644
--- a/rsScriptC_LibGL.cpp
+++ b/rsScriptC_LibGL.cpp
@@ -351,13 +351,59 @@
CHECK_OBJ(va);
GET_TLS();
Allocation *alloc = static_cast<Allocation *>(va);
- rsc->mStateFont.renderText(alloc, x, y);
+ const char *text = (const char *)alloc->getPtr();
+ size_t allocSize = alloc->getType()->getSizeBytes();
+ rsc->mStateFont.renderText(text, allocSize, x, y);
}
static void SC_DrawText(const char *text, int x, int y)
{
GET_TLS();
- rsc->mStateFont.renderText(text, x, y);
+ size_t textLen = strlen(text);
+ rsc->mStateFont.renderText(text, textLen, x, y);
+}
+
+static void SC_setMetrics(Font::Rect *metrics,
+ int32_t *left, int32_t *right,
+ int32_t *top, int32_t *bottom)
+{
+ if(left) {
+ *left = metrics->left;
+ }
+ if(right) {
+ *right = metrics->right;
+ }
+ if(top) {
+ *top = metrics->top;
+ }
+ if(bottom) {
+ *bottom = metrics->bottom;
+ }
+}
+
+static void SC_MeasureTextAlloc(RsAllocation va,
+ int32_t *left, int32_t *right,
+ int32_t *top, int32_t *bottom)
+{
+ CHECK_OBJ(va);
+ GET_TLS();
+ Allocation *alloc = static_cast<Allocation *>(va);
+ const char *text = (const char *)alloc->getPtr();
+ size_t textLen = alloc->getType()->getSizeBytes();
+ Font::Rect metrics;
+ rsc->mStateFont.measureText(text, textLen, &metrics);
+ SC_setMetrics(&metrics, left, right, top, bottom);
+}
+
+static void SC_MeasureText(const char *text,
+ int32_t *left, int32_t *right,
+ int32_t *top, int32_t *bottom)
+{
+ GET_TLS();
+ size_t textLen = strlen(text);
+ Font::Rect metrics;
+ rsc->mStateFont.measureText(text, textLen, &metrics);
+ SC_setMetrics(&metrics, left, right, top, bottom);
}
static void SC_BindFont(RsFont font)
@@ -432,6 +478,8 @@
{ "_Z11rsgDrawTextPKcii", (void *)&SC_DrawText },
{ "_Z11rsgDrawText13rs_allocationii", (void *)&SC_DrawTextAlloc },
+ { "_Z14rsgMeasureTextPKcPiS1_S1_S1_", (void *)&SC_MeasureText },
+ { "_Z14rsgMeasureText13rs_allocationPiS0_S0_S0_", (void *)&SC_MeasureTextAlloc },
{ "_Z11rsgBindFont7rs_font", (void *)&SC_BindFont },
{ "_Z12rsgFontColorffff", (void *)&SC_FontColor },
diff --git a/scriptc/rs_graphics.rsh b/scriptc/rs_graphics.rsh
index c0b2d2d..ac6f8cc 100644
--- a/scriptc/rs_graphics.rsh
+++ b/scriptc/rs_graphics.rsh
@@ -79,6 +79,12 @@
rsgBindFont(rs_font);
extern void __attribute__((overloadable))
rsgFontColor(float, float, float, float);
+// Returns the bounding box of the text relative to (0, 0)
+// Any of left, right, top, bottom could be NULL
+extern void __attribute__((overloadable))
+ rsgMeasureText(const char *, int *left, int *right, int *top, int *bottom);
+extern void __attribute__((overloadable))
+ rsgMeasureText(rs_allocation, int *left, int *right, int *top, int *bottom);
extern void __attribute__((overloadable))
rsgMeshComputeBoundingBox(rs_mesh mesh, float *minX, float *minY, float *minZ,