gpu: Compositor management of GpuMemoryBuffer instances.

gpu/GLES2/extensions/CHROMIUM/CHROMIUM_image.txt

 Name
 
     CHROMIUM_image
 
 Name Strings
 
     GL_CHROMIUM_image
 
 Version
 
-    Last Modifed Date: Apr 30, 2014
+    Last Modifed Date: Oct 7, 2014
 
 Dependencies
 
     OpenGL ES 2.0 is required.
 
 Overview
 
-    This extension allows for more efficient uploading of texture data through
-    Chromium's OpenGL ES 2.0 implementation as well as enable hardware overlay
-    support by providing ability to create buffers capable of being scanned out
-    directly by the display controller.
-
-    For security reasons Chromium accesses the GPU from a separate process. User
-    processes are not allowed to access the GPU directly. This multi-process
-    architechure has the advantage that GPU operations can be secured and
-    pipelined but it has the disadvantage that all data that is going to be
-    passed to GPU must first be made available to the separate GPU process.
-
-    This extension helps the application directly allocate and access texture
-    memory.
+    This extension defines a new resource type that is suitable for
+    sharing 2D arrays of image data between client APIs.
 
 Issues
 
     None
 
 New Tokens
 
-    Accepted by the <pname> parameter of GetImageParameterivCHROMIUM:
-
-        IMAGE_ROWBYTES_CHROMIUM 0x78F0
-
-    Accepted by the <usage> parameter of CreateImageCHROMIUM:
-
-        IMAGE_MAP_CHROMIUM 0x78F1
-        IMAGE_SCANOUT_CHROMIUM 0x78F2
+    None
 
 New Procedures and Functions
 
-    GLuint CreateImageCHROMIUM(GLsizei width, GLsizei height,
-                               GLenum internalformat, GLenum usage)
+    GLuint CreateImageCHROMIUM(ClientBuffer buffer,
+                               GLsizei width,
+                               GLsizei height,
+                               GLenum internalformat)
 
-    Allocate an image with width equal to <width> and height equal
-    to <height> stored in format <internalformat>.
+    Create an image from <buffer> with width equal to <width> and
+    height equal to <height> and format equal to <internalformat>.
 
-    Returns a unique identifier for the allocated image that could be used
-    in subsequent operations.
+    Returns a unique identifier for the image that could be used in
+    subsequent operations.
 
     INVALID_VALUE is generated if <width> or <height> is nonpositive.
 
-    INVALID_ENUM is generated if <usage> is not one of
-    IMAGE_MAP_CHROMIUM and IMAGE_SCANOUT_CHROMIUM.
+    INVALID_ENUM is generated if <internalformat> is not one of
+    RGB or RGBA.
 
     void DestroyImageCHROMIUM(GLuint image_id)
 
-    Frees the image previously allocated by a call to CreateImageCHROMIUM.
+    Frees the image previously created by a call to CreateImageCHROMIUM.
 
     INVALID_OPERATION is generated if <image_id> is not a valid image id.
 
-    void* MapImageCHROMIUM(GLuint image_id)
-
-    Returns a pointer to in the user memory for the application to modify
-    the image. It is illegal to call this function on an image not created
-    with IMAGE_MAP_CHROMIUM usage.
-
-    INVALID_OPERATION is generated if <image_id> is not a valid image id.
-
-    INVALID_OPERATION is generated if the image was already mapped by a previous
-    call to this method.
-
-    void UnmapImageCHROMIUM(GLuint image_id)
-
-    Removes the mapping created by a call to MapImageCHROMIUM.
-
-    Note that after calling UnmapImageCHROMIUM the application should assume
-    that the memory returned by MapImageCHROMIUM is off limits and is no longer
-    accessible by the application. Accessing it after calling
-    UnmapImageCHROMIUM will produce undefined results.
-
-    INVALID_OPERATION is generated if <image_id> is not a valid image id.
-
-    INVALID_OPERATION is generated if the image was not already mapped by a
-    previous call to MapImageCHROMIUM.
-
-    void GetImageParameterivCHROMIUM(GLuint image_id, GLenum pname,
-                                     GLint* params)
-
-    Sets <params> to the integer value of the parameter specified by <pname>
-    for the image specified by <image_id>. <params> is expected to be
-    properly allocated before calling this method.
-
-    INVALID_OPERATION is generated if <image_id> is not a valid image id.
-
-    INVALID_ENUM is generated if <pname> is not IMAGE_ROWBYTES_CHROMIUM.
-
 Errors
 
     None.
 
 New State
 
     None.
 
 Revision History
 
     5/9/2013    Documented the extension
     4/30/2014   Moved usage flag to creation function.
+    10/7/2014   Remove map/unmap API.