Support RGBA fonts and bitmap fonts (and RGBA bitmap fonts)

Quite a few things going on in this commit:

- Enable bitmap strikes by default in Paint objects.

The SkPaint parameter that enables bitmap strikes was not previously
included in DEFAULT_PAINT_FLAGS. This effectively disabled bitmap
fonts. Oops! It's for the best, though, as additional work was needed
in Skia to make bitmap fonts work anyway.

- Complain if TEXTURE_BORDER_SIZE is not 1.

Our glyph cache code does not currently handle any value other than 1
here, including zero. I've added a little C preprocessor check to
prevent future engineers (including especially future-me) from
thinking that they can change this value without updating the related
code.

- Add GL_RGBA support to hwui's FontRenderer and friends

This also happened to involve some refactoring for convenience and
cleanliness.

Bug: 9577689
Change-Id: I0abd1e5a0d6623106247fb6421787e2c2f2ea19c

1 files changed, 7 insertions, 7 deletions

diff --git a/libs/hwui/GammaFontRenderer.h b/libs/hwui/GammaFontRenderer.h
index bbfa66d..46cfd04 100644
--- a/libs/hwui/GammaFontRenderer.h
+++ b/libs/hwui/GammaFontRenderer.h
@@ -35,7 +35,7 @@ public:
     virtual FontRenderer& getFontRenderer(const SkPaint* paint) = 0;
 
     virtual uint32_t getFontRendererCount() const = 0;
-    virtual uint32_t getFontRendererSize(uint32_t fontRenderer) const = 0;
+    virtual uint32_t getFontRendererSize(uint32_t fontRenderer, GLenum format) const = 0;
 
     virtual void describe(ProgramDescription& description, const SkPaint* paint) const = 0;
     virtual void setupProgram(ProgramDescription& description, Program* program) const = 0;
@@ -81,8 +81,8 @@ public:
         return 1;
     }
 
-    uint32_t getFontRendererSize(uint32_t fontRenderer) const {
-        return mRenderer ? mRenderer->getCacheSize() : 0;
+    uint32_t getFontRendererSize(uint32_t fontRenderer, GLenum format) const {
+        return mRenderer ? mRenderer->getCacheSize(format) : 0;
     }
 
     void describe(ProgramDescription& description, const SkPaint* paint) const;
@@ -128,8 +128,8 @@ public:
         return 1;
     }
 
-    uint32_t getFontRendererSize(uint32_t fontRenderer) const {
-        return mRenderer ? mRenderer->getCacheSize() : 0;
+    uint32_t getFontRendererSize(uint32_t fontRenderer, GLenum format) const {
+        return mRenderer ? mRenderer->getCacheSize(format) : 0;
     }
 
     void describe(ProgramDescription& description, const SkPaint* paint) const {
@@ -162,13 +162,13 @@ public:
         return kGammaCount;
     }
 
-    uint32_t getFontRendererSize(uint32_t fontRenderer) const {
+    uint32_t getFontRendererSize(uint32_t fontRenderer, GLenum format) const {
         if (fontRenderer >= kGammaCount) return 0;
 
         FontRenderer* renderer = mRenderers[fontRenderer];
         if (!renderer) return 0;
 
-        return renderer->getCacheSize();
+        return renderer->getCacheSize(format);
     }
 
     void describe(ProgramDescription& description, const SkPaint* paint) const {