GPU client side changes for GpuMemoryBuffers:

- Introduces a new GL extension CHROMIUM_map_image that contains Create/Destroy/Map/Unmap/GetImageParameteriv methods.
- A new data structure called GpuMemoryBufferTracker to track these buffers and images on the client side.

BUG=175012

Review URL: https://chromiumcodereview.appspot.com/14456004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@200505 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 146 insertions, 0 deletions

diff --git a/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_map_image.txt b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_map_image.txt
new file mode 100644
index 0000000..6304fda
--- /dev/null
+++ b/gpu/GLES2/extensions/CHROMIUM/CHROMIUM_map_image.txt
@@ -0,0 +1,107 @@
+Name
+
+    CHROMIUM_map_image
+
+Name Strings
+
+    GL_CHROMIUM_map_image
+
+Version
+
+    Last Modifed Date: May 9, 2013
+
+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.
+
+    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.
+
+Issues
+
+    None
+
+New Tokens
+
+    None
+
+New Procedures and Functions
+
+    GLuint CreateImageCHROMIUM (GLsizei width, GLsizei height,
+                                GLenum internalformat)
+
+    Allocate an image with width equal to <width> and height equal
+    to <height> stored in format <internalformat>.
+
+    Returns a unique identifier for the allocated image that could be used
+    in subsequent operations.
+
+    INVALID_VALUE is generated if <width> or <height> is nonpositive.
+
+    void DestroyImageCHROMIUM (GLuint image_id)
+
+    Frees the image previously allocated by a call to CreateImageCHROMIUM.
+
+    INVALID_OPERATION is generated if <image_id> is not a valid image id.
+
+    void* MapImageCHROMIUM (GLuint image_id, GLenum access)
+
+    Returns a pointer to in the user memory for the application to modify
+    the image. <access> parameter defines if the user will read or write the
+    pixels.
+
+    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.
+
+    INVALID_ENUM is generated if <access> is not one of WRITE_ONLY, READ_ONLY
+    and READ_WRITE.
+
+    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
diff --git a/gpu/GLES2/gl2chromium_autogen.h b/gpu/GLES2/gl2chromium_autogen.h
index fa099e6..e8970e0 100644
--- a/gpu/GLES2/gl2chromium_autogen.h
+++ b/gpu/GLES2/gl2chromium_autogen.h
@@ -182,6 +182,8 @@
 #define glEnableFeatureCHROMIUM GLES2_GET_FUN(EnableFeatureCHROMIUM)
 #define glMapBufferCHROMIUM GLES2_GET_FUN(MapBufferCHROMIUM)
 #define glUnmapBufferCHROMIUM GLES2_GET_FUN(UnmapBufferCHROMIUM)
+#define glMapImageCHROMIUM GLES2_GET_FUN(MapImageCHROMIUM)
+#define glUnmapImageCHROMIUM GLES2_GET_FUN(UnmapImageCHROMIUM)
 #define glMapBufferSubDataCHROMIUM GLES2_GET_FUN(MapBufferSubDataCHROMIUM)
 #define glUnmapBufferSubDataCHROMIUM GLES2_GET_FUN(UnmapBufferSubDataCHROMIUM)
 #define glMapTexSubImage2DCHROMIUM GLES2_GET_FUN(MapTexSubImage2DCHROMIUM)
@@ -199,6 +201,10 @@
     CreateStreamTextureCHROMIUM)
 #define glDestroyStreamTextureCHROMIUM GLES2_GET_FUN( \
     DestroyStreamTextureCHROMIUM)
+#define glCreateImageCHROMIUM GLES2_GET_FUN(CreateImageCHROMIUM)
+#define glDestroyImageCHROMIUM GLES2_GET_FUN(DestroyImageCHROMIUM)
+#define glGetImageParameterivCHROMIUM GLES2_GET_FUN( \
+    GetImageParameterivCHROMIUM)
 #define glGetTranslatedShaderSourceANGLE GLES2_GET_FUN( \
     GetTranslatedShaderSourceANGLE)
 #define glPostSubBufferCHROMIUM GLES2_GET_FUN(PostSubBufferCHROMIUM)
diff --git a/gpu/GLES2/gl2extchromium.h b/gpu/GLES2/gl2extchromium.h
index 9193467..d23191c 100644
--- a/gpu/GLES2/gl2extchromium.h
+++ b/gpu/GLES2/gl2extchromium.h
@@ -94,6 +94,39 @@ typedef GLboolean (GL_APIENTRY PFNGLUNMAPBUFFERCHROMIUM) (GLuint target);
 #endif
 #endif  /* GL_CHROMIUM_pixel_transfer_buffer_object */
 
+/* GL_CHROMIUM_map_image */
+#ifndef GL_CHROMIUM_map_image
+#define GL_CHROMIUM_map_image 1
+
+#ifndef GL_IMAGE_ROWBYTES_CHROMIUM
+#define GL_IMAGE_ROWBYTES_CHROMIUM 0x78F0
+#endif
+
+#ifndef GL_READ_WRITE
+#define GL_READ_WRITE 0x88BA
+#endif
+
+#ifdef GL_GLEXT_PROTOTYPES
+GL_APICALL GLuint GL_APIENTRY glCreateImageCHROMIUM(
+    GLsizei width, GLsizei height, GLenum internalformat);
+GL_APICALL void GL_APIENTRY glDestroyImageCHROMIUM(GLuint image_id);
+GL_APICALL void GL_APIENTRY glGetImageParameterivCHROMIUM(
+    GLuint image_id, GLenum pname, GLint* params);
+GL_APICALL void* GL_APIENTRY glMapImageCHROMIUM(GLuint image_id, GLenum access);
+GL_APICALL void GL_APIENTRY glUnmapImageCHROMIUM(GLuint image_id);
+#endif
+typedef GLuint (GL_APIENTRYP PFNGLCREATEIMAGECHROMIUMPROC) (
+    GLsizei width, GLsizei height, GLenum internalformat);
+typedef void (
+    GL_APIENTRYP PFNGLDESTROYIMAGECHROMIUMPROC) (GLuint image_id);
+typedef void (
+    GL_APIENTRYP PFNGLGETIMAGEPARAMETERIVCHROMIUMPROC) (
+    GLuint image_id, GLenum pname, GLint* params);
+typedef void* (GL_APIENTRYP PFNGLMAPIMAGECHROMIUMPROC) (
+    GLuint image_id, GLenum access);
+typedef void (GL_APIENTRYP PFNGLUNMAPIMAGECHROMIUMPROC) (GLuint image_id);
+#endif  /* GL_CHROMIUM_map_image */
+
 /* GL_CHROMIUM_map_sub */
 #ifndef GL_CHROMIUM_map_sub
 #define GL_CHROMIUM_map_sub 1