Tile Compression

cc/resources/tile_task_worker_pool.cc

Index: cc/resources/tile_task_worker_pool.cc
diff --git a/cc/resources/tile_task_worker_pool.cc b/cc/resources/tile_task_worker_pool.cc
index 1c0d6b980edfb273cbaa0bb28d0e87edd8edf309..2e308477a2f35ba783ee20938810ef753a45eeff 100644
--- a/cc/resources/tile_task_worker_pool.cc
+++ b/cc/resources/tile_task_worker_pool.cc
@@ -12,6 +12,7 @@
 #include "base/threading/simple_thread.h"
 #include "cc/base/scoped_ptr_deque.h"
 #include "cc/resources/raster_source.h"
+#include "cc/resources/texture_compress/texture_compress.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkSurface.h"
@@ -195,6 +196,11 @@ void TileTaskWorkerPool::InsertNodesForRasterTask(
 
 static bool IsSupportedPlaybackToMemoryFormat(ResourceFormat format) {
   switch (format) {
+    case ATC:
+    case ATC_IA:
+    case DXT1:
+    case DXT5:
+    case ETC1:
     case RGBA_4444:
     case RGBA_8888:
     case BGRA_8888:
@@ -202,7 +208,6 @@ static bool IsSupportedPlaybackToMemoryFormat(ResourceFormat format) {
     case ALPHA_8:
     case LUMINANCE_8:
     case RGB_565:
-    case ETC1:
     case RED_8:
       return false;
   }
@@ -220,6 +225,51 @@ void TileTaskWorkerPool::PlaybackToMemory(void* memory,
                                           float scale) {
   DCHECK(IsSupportedPlaybackToMemoryFormat(format)) << format;
 
+  if (IsFormatCompressed(format)) {
+    SkBitmap bitmap;
+    bitmap.allocN32Pixels(size.width(), size.height());
+
+    SkCanvas canvas(bitmap);
+    raster_source->PlaybackToCanvas(&canvas, rect, scale);
+
+    switch (format) {
+      case ATC:
+        texture_compress::CompressATC(
+            reinterpret_cast<const uint8_t*>(bitmap.getPixels()),
+            reinterpret_cast<uint8_t*>(memory), bitmap.width(),
+            bitmap.height());
+        break;
+      case ATC_IA:
+        texture_compress::CompressATCIA(
+            reinterpret_cast<const uint8_t*>(bitmap.getPixels()),
+            reinterpret_cast<uint8_t*>(memory), bitmap.width(),
+            bitmap.height());
+        break;
+      case DXT1:
+        texture_compress::CompressDXT1(
+            reinterpret_cast<const uint8_t*>(bitmap.getPixels()),
+            reinterpret_cast<uint8_t*>(memory), bitmap.width(),
+            bitmap.height());
+        break;
+      case DXT5:
+        texture_compress::CompressDXT5(
+            reinterpret_cast<const uint8_t*>(bitmap.getPixels()),
+            reinterpret_cast<uint8_t*>(memory), bitmap.width(),
+            bitmap.height());
+        break;
+      case ETC1:
+        texture_compress::CompressETC1(
+            reinterpret_cast<const uint8_t*>(bitmap.getPixels()),
+            reinterpret_cast<uint8_t*>(memory), bitmap.width(),
+            bitmap.height());
+        break;
+      default:
+        NOTREACHED();
+        break;
+    }
+    return;
+  }
+
   // Uses kPremul_SkAlphaType since the result is not known to be opaque.
   SkImageInfo info =
       SkImageInfo::MakeN32(size.width(), size.height(), kPremul_SkAlphaType);