Adding GetStreamInfo functionality (and passing corresponding unit test).

Review URL: http://codereview.chromium.org/147237

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@19859 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 37 insertions, 0 deletions

diff --git a/o3d/command_buffer/common/cross/cmd_buffer_format.h b/o3d/command_buffer/common/cross/cmd_buffer_format.h
index b0b9386..1872a34 100644
--- a/o3d/command_buffer/common/cross/cmd_buffer_format.h
+++ b/o3d/command_buffer/common/cross/cmd_buffer_format.h
@@ -293,6 +293,8 @@ enum CommandId {
   SET_PARAM_DATA,                    // SetParamData, 4 args
   SET_PARAM_DATA_IMMEDIATE,          // SetParamData, 2 args + data
   GET_PARAM_DESC,                    // GetParamDesc, 4 args
+  GET_STREAM_COUNT,                  // GetStreamCount, 4 args.
+  GET_STREAM_DESC,                   // GetStreamDesc, 5 args
   DESTROY_TEXTURE,                   // DestroyTexture, 1 arg
   CREATE_TEXTURE_2D,                 // CreateTexture2D, 3 args
   CREATE_TEXTURE_3D,                 // CreateTexture3D, 4 args
diff --git a/o3d/command_buffer/common/cross/gapi_interface.h b/o3d/command_buffer/common/cross/gapi_interface.h
index 9531973..67700b7 100644
--- a/o3d/command_buffer/common/cross/gapi_interface.h
+++ b/o3d/command_buffer/common/cross/gapi_interface.h
@@ -481,6 +481,34 @@ class GAPIInterface {
                                   unsigned int size,
                                   void *data) = 0;
 
+  // Gets the number of input streams for an effect, returning it in a memory
+  // buffer as a Uint32.
+  // Parameters:
+  //   id: the resource ID of the effect.
+  //   size: the size of the data buffer. Must be at least 4 (the size of the
+  //   Uint32).
+  //   data: the buffer receiving the data.
+  // Returns:
+  //   BufferSyncInterface::PARSE_INVALID_ARGUMENTS if invalid arguments are
+  //   passed, BufferSyncInterface::PARSE_NO_ERROR otherwise.
+  virtual ParseError GetStreamCount(ResourceID id,
+                                    unsigned int size,
+                                    void *data) = 0;
+
+  // Gets the stream semantics, storing them in the data buffer. The stream
+  // is described by an effect_stream::Desc structure which contains a
+  // semantic type and a semantic index.
+  // Parameters:
+  //   id: the resource ID of the effect.
+  //   index: which stream semantic to get
+  //   size: the size of the data buffer. Must be at least 8 (the size of two
+  //   Uint32).
+  //   data: the buffer receiving the data.
+  virtual ParseError GetStreamDesc(ResourceID id,
+                                   unsigned int index,
+                                   unsigned int size,
+                                   void *data) = 0;
+
   // Creates a 2D texture resource.
   // Parameters:
   //   id: the resource ID of the texture.
diff --git a/o3d/command_buffer/common/cross/resource.h b/o3d/command_buffer/common/cross/resource.h
index 8e86723..861d24f 100644
--- a/o3d/command_buffer/common/cross/resource.h
+++ b/o3d/command_buffer/common/cross/resource.h
@@ -134,6 +134,13 @@ struct Desc {
 };
 }  // namespace effect_param
 
+namespace effect_stream {
+struct Desc {
+  Uint32 semantic;         // the semantic type
+  Uint32 semantic_index;
+};
+}  // namespace effect_stream
+
 namespace texture {
 // Texture flags.
 enum Flags {