Tile Compression

cc/resources/texture_compress/texture_compress.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/resources/texture_compress/texture_compress.h"
+
+#include "base/logging.h"
+
+#include "cc/resources/texture_compress/atc_dxt.h"
+#include "cc/resources/texture_compress/etc1.h"
+
+#if defined(OS_ANDROID) && defined(ARCH_CPU_ARMEL)
+#include <cpu-features.h>
+#include "cc/resources/texture_compress/arm/atc_dxt_neon.h"
+#include "cc/resources/texture_compress/arm/etc1_neon.h"
+#endif
+
+namespace cc {
+namespace texture_compress {
+
+static void TextureCompressInit();
+
+static void CompressATC_Uninitialized(const uint8_t* src,
+                                      uint8_t* dst,
+                                      int width,
+                                      int height) {
+  TextureCompressInit();
+  CompressATC(src, dst, width, height);
+}
+
+static void CompressATCIA_Uninitialized(const uint8_t* src,
+                                        uint8_t* dst,
+                                        int width,
+                                        int height) {
+  TextureCompressInit();
+  CompressATCIA(src, dst, width, height);
+}
+
+static void CompressDXT1_Uninitialized(const uint8_t* src,
+                                       uint8_t* dst,
+                                       int width,
+                                       int height) {
+  TextureCompressInit();
+  CompressDXT1(src, dst, width, height);
+}
+
+static void CompressDXT5_Uninitialized(const uint8_t* src,
+                                       uint8_t* dst,
+                                       int width,
+                                       int height) {
+  TextureCompressInit();
+  CompressDXT5(src, dst, width, height);
+}
+
+static void CompressETC1_Uninitialized(const uint8_t* src,
+                                       uint8_t* dst,
+                                       int width,
+                                       int height) {
+  TextureCompressInit();
+  CompressETC1(src, dst, width, height);
+}
+
+TextureCompressFunc CompressATC = CompressATC_Uninitialized;
+TextureCompressFunc CompressATCIA = CompressATCIA_Uninitialized;
+TextureCompressFunc CompressETC1 = CompressETC1_Uninitialized;
+TextureCompressFunc CompressDXT1 = CompressDXT1_Uninitialized;
+TextureCompressFunc CompressDXT5 = CompressDXT5_Uninitialized;
+
+static void TextureCompressInit() {
+  Init_ATC_DXT();
+
+  CompressATC = CompressATC_Generic;
+  CompressATCIA = CompressATCIA_Generic;
+  CompressETC1 = etc1::CompressTexture;
+  CompressDXT1 = CompressDXT1_Generic;
+  CompressDXT5 = CompressDXT5_Generic;
+
+#if defined(OS_ANDROID) && defined(ARCH_CPU_ARMEL)
+  if ((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0) {
+    CompressATC = CompressATC_NEON;
+    CompressATCIA = CompressATCIA_NEON;
+    CompressETC1 = etc1_neon::CompressTexture;
+    CompressDXT1 = CompressDXT1_NEON;
+    CompressDXT5 = CompressDXT5_NEON;
+  }
+#endif
+}
+
+}  // namespace texture_compress
+}  // namespace cc