Draw Operation merging

Merge simple bitmap draw operations and text operations to avoid
issuing individual gl draws for each operation. Merging other ops to
be done eventually.

The methods are different - the bitmap merging generates a single
mesh for reused, unclipped images (esp. repeated images in a listview)

The text approach queries just defers the normal font rendering until
the last drawText in the sequence that can share the same shader.

Patches are sorted and merged, but don't yet have a multiDraw
implementation. For now, the pretending-to-merge gives better sorting
behavior by keeping similar patches together.

Change-Id: Ic300cdab0a53814cf7b09c58bf54b1bf0f58ccd6

1 files changed, 8 insertions, 6 deletions

diff --git a/libs/hwui/FontRenderer.cpp b/libs/hwui/FontRenderer.cpp
index 6894ef916570..543cfa2cc792 100644
--- a/libs/hwui/FontRenderer.cpp
+++ b/libs/hwui/FontRenderer.cpp
@@ -57,7 +57,6 @@ FontRenderer::FontRenderer() :
 
     mGammaTable = NULL;
     mInitialized = false;
-    mMaxNumberOfQuads = 1024;
 
     mCurrentCacheTexture = NULL;
 
@@ -293,7 +292,7 @@ void FontRenderer::cacheBitmap(const SkGlyph& glyph, CachedGlyphInfo* cachedGlyp
 }
 
 CacheTexture* FontRenderer::createCacheTexture(int width, int height, bool allocate) {
-    CacheTexture* cacheTexture = new CacheTexture(width, height, mMaxNumberOfQuads);
+    CacheTexture* cacheTexture = new CacheTexture(width, height, gMaxNumberOfQuads);
 
     if (allocate) {
         Caches::getInstance().activeTexture(0);
@@ -320,12 +319,12 @@ void FontRenderer::initTextTexture() {
 
 // Avoid having to reallocate memory and render quad by quad
 void FontRenderer::initVertexArrayBuffers() {
-    uint32_t numIndices = mMaxNumberOfQuads * 6;
+    uint32_t numIndices = gMaxNumberOfQuads * 6;
     uint32_t indexBufferSizeBytes = numIndices * sizeof(uint16_t);
     uint16_t* indexBufferData = (uint16_t*) malloc(indexBufferSizeBytes);
 
     // Four verts, two triangles , six indices per quad
-    for (uint32_t i = 0; i < mMaxNumberOfQuads; i++) {
+    for (uint32_t i = 0; i < gMaxNumberOfQuads; i++) {
         int i6 = i * 6;
         int i4 = i * 4;
 
@@ -594,7 +593,7 @@ void FontRenderer::endPrecaching() {
 
 bool FontRenderer::renderPosText(SkPaint* paint, const Rect* clip, const char *text,
         uint32_t startIndex, uint32_t len, int numGlyphs, int x, int y,
-        const float* positions, Rect* bounds, Functor* functor) {
+        const float* positions, Rect* bounds, Functor* functor, bool forceFinish) {
     if (!mCurrentFont) {
         ALOGE("No font set");
         return false;
@@ -602,7 +601,10 @@ bool FontRenderer::renderPosText(SkPaint* paint, const Rect* clip, const char *t
 
     initRender(clip, bounds, functor);
     mCurrentFont->render(paint, text, startIndex, len, numGlyphs, x, y, positions);
-    finishRender();
+
+    if (forceFinish) {
+        finishRender();
+    }
 
     return mDrawn;
 }