New widget: TextureView

Bug #4343984

TextureView can be used to render media content (video, OpenGL,
RenderScript) inside a View.

The key difference with SurfaceView is that TextureView does
not create a new Surface. This gives the ability to seamlessly
transform, animate, fade, etc. a TextureView, which was hard
if not impossible to do with a SurfaceView.
A TextureView also interacts perfectly with ScrollView,
ListView, etc. It allows application to embed media content
in a much more flexible way than before.

For instance, to render the camera preview at 50% opacity,
all you need to do is the following:

mTextureView.setAlpha(0.5f);
Camera c = Camera.open();
c.setPreviewTexture(mTextureView.getSurfaceTexture());
c.startPreview();

TextureView uses a SurfaceTexture to get the job done. More
APIs are required to make it easy to create OpenGL contexts
for a TextureView. It can currently be done with a bit of
JNI code.

Change-Id: Iaa7953097ab5beb8437bcbbfa03b2df5b7f80cd7

1 files changed, 5 insertions, 0 deletions

diff --git a/libs/hwui/ProgramCache.h b/libs/hwui/ProgramCache.h
index 18d98cb05e10..70909fd622bf 100644
--- a/libs/hwui/ProgramCache.h
+++ b/libs/hwui/ProgramCache.h
@@ -77,6 +77,8 @@ namespace uirenderer {
 
 #define PROGRAM_HAS_WIDTH_SHIFT 37
 
+#define PROGRAM_HAS_EXTERNAL_TEXTURE_SHIFT 38
+
 ///////////////////////////////////////////////////////////////////////////////
 // Types
 ///////////////////////////////////////////////////////////////////////////////
@@ -113,6 +115,7 @@ struct ProgramDescription {
     // Texturing
     bool hasTexture;
     bool hasAlpha8Texture;
+    bool hasExternalTexture;
 
     // Modulate, this should only be set when setColor() return true
     bool modulate;
@@ -151,6 +154,7 @@ struct ProgramDescription {
     void reset() {
         hasTexture = false;
         hasAlpha8Texture = false;
+        hasExternalTexture = false;
 
         hasWidth = false;
 
@@ -240,6 +244,7 @@ struct ProgramDescription {
         if (modulate) key |= programid(0x1) << PROGRAM_MODULATE_SHIFT;
         if (isPoint) key |= programid(0x1) << PROGRAM_IS_POINT_SHIFT;
         if (hasWidth) key |= programid(0x1) << PROGRAM_HAS_WIDTH_SHIFT;
+        if (hasExternalTexture) key |= programid(0x1) << PROGRAM_HAS_EXTERNAL_TEXTURE_SHIFT;
         return key;
     }