1 files changed, 120 insertions, 0 deletions
diff --git a/o3d/gpu/command_buffer/common/resource.cc b/o3d/gpu/command_buffer/common/resource.cc
new file mode 100644
index 0000000..f3b75ec
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+++ b/o3d/gpu/command_buffer/common/resource.cc
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+// This file contains the implementation of the helper functions for resources.
+
+#include "gpu/command_buffer/common/resource.h"
+
+namespace command_buffer {
+
+namespace texture {
+
+// Gets the number of bytes per block for a given format.
+unsigned int GetBytesPerBlock(Format format) {
+  switch (format) {
+    case kXRGB8:
+    case kARGB8:
+    case kR32F:
+      return 4;
+    case kABGR16F:
+      return 8;
+    case kABGR32F:
+      return 16;
+    case kDXT1:
+      return 8;
+    default:
+      // TODO(petersont): Add DXT3/5 support.
+      LOG(FATAL) << "Invalid format";
+      return 1;
+  }
+}
+
+// Gets the width of a block for a given format.
+unsigned int GetBlockSizeX(Format format) {
+  switch (format) {
+    case kXRGB8:
+    case kARGB8:
+    case kABGR16F:
+    case kR32F:
+    case kABGR32F:
+      return 1;
+    case kDXT1:
+      return 4;
+    default:
+      // TODO(petersont): Add DXT3/5 support.
+      LOG(FATAL) << "Invalid format";
+      return 1;
+  }
+}
+
+// Gets the height of a block for a given format.
+unsigned int GetBlockSizeY(Format format) {
+  // NOTE: currently only supported formats use square blocks.
+  return GetBlockSizeX(format);
+}
+
+}  // namespace texture
+
+namespace effect_param {
+
+// Gets the size of the data of a given parameter type.
+unsigned int GetDataSize(DataType type) {
+  switch (type) {
+    case kUnknown:
+      return 0;
+    case kFloat1:
+      return sizeof(float);  // NOLINT
+    case kFloat2:
+      return sizeof(float) * 2;  // NOLINT
+    case kFloat3:
+      return sizeof(float) * 3;  // NOLINT
+    case kFloat4:
+      return sizeof(float) * 4;  // NOLINT
+    case kMatrix4:
+      return sizeof(float) * 16;  // NOLINT
+    case kInt:
+      return sizeof(int);  // NOLINT
+    case kBool:
+      return sizeof(bool);  // NOLINT
+    case kSampler:
+      return sizeof(ResourceId);  // NOLINT
+    case kTexture:
+      return sizeof(ResourceId);  // NOLINT
+    default:
+      LOG(FATAL) << "Invalid type.";
+      return 0;
+  }
+}
+
+}  // namespace effect_param
+
+}  // namespace command_buffer