Break glScheduleCALayerCHROMIUM into smaller functions.

gpu/GLES2/extensions/CHROMIUM/CHROMIUM_schedule_ca_layer.txt

 Name
 
     CHROMIUM_schedule_ca_layer
 
 Name Strings
 
     GL_CHROMIUM_schedule_ca_layer
 
 Version
 
@@ skipping 21 matching lines @@
     Accepted by the <edge_aa_mask> parameter of glScheduleCALayerCHROMIUM:
     GL_CA_LAYER_EDGE_LEFT_CHROMIUM                    0x01
     GL_CA_LAYER_EDGE_RIGHT_CHROMIUM                   0x02
     GL_CA_LAYER_EDGE_BOTTOM_CHROMIUM                  0x04
     GL_CA_LAYER_EDGE_TOP_CHROMIUM                     0x08
 
 New Procedures and Functions
 
     The command
 
+        glScheduleCALayerSharedStateCHROMIUM(GLfloat opacity,
+                                             GLboolean is_clipped,
+                                             const GLfloat* clip_rect,
+                                             GLint sorting_context_id,
+                                             const GLfloat* transform);
+
+    sets state that will be shared by each subsequent call to
+    glScheduleCALayerCHROMIUM. A subsequent call to
+    glScheduleCALayerSharedStateCHROMIUM overrides the previous shared state
+    values.
+    <opacity> specifies the opacity of the CALayer.
+    <is_clipped> indicates if the layer should be clipped.
+    <clip_rect> contains four values indicating the x, y, width, and height of
+    the rectangle to clip the layer to, if it is to be clipped.
+    <sorting_context_id> Layers in a non-zero sorting context exist in the same
+    3D space and should intersect.
+    <transform> contains sixteen values indicating the row major order 4x4
+    transformation matrix to apply to the CALayer.
+
+    The command
+

[ccameron, 2016/07/19 20:29:51]

Let's just have SwapBuffers automatically clear the shared state, rather than
having an explicit "unschedule". We already latch everything at swap, so it's
pretty consistent.

[erikchen, 2016/07/19 20:42:26]

Done.

+       glUnscheduleCALayerSharedStateCHROMIUM();
+
+    unsets the state set by glScheduleCALayerSharedStateCHROMIUM. This command
+    is used to prevent shared state from leaking into inappropriate frames.
+
+    The command
+
         glScheduleCALayerCHROMIUM(GLuint contents_texture_id,
                                   const GLfloat* contents_rect,
-                                  GLfloat opacity,
                                   GLuint background_color,
                                   GLuint edge_aa_mask,
                                   const GLfloat* bounds_rect,
-                                  GLboolean is_clipped,
-                                  const GLfloat* clip_rect,
-                                  const GLfloat* transform,
                                   GLuint filter);
 
-    Set the CALayer parameters to be presented at the time of the next call to
-    swap buffers. The order of the calls schedule CALayers determines their
-    back-to-front presentation order.
+    requires that shared state has been previously set by
+    glScheduleCALayerSharedStateCHROMIUM. It sets the CALayer parameters to be
+    presented at the time of the next call to swap buffers. The order of the
+    calls schedule CALayers determines their back-to-front presentation order.
     <contents_texture_id> is the texture to be presented. If zero, then the
     CALayer will be a solid color.
     <contents_rect> contains four values indicating the x, y, width, and height
     of the sub-rectangle to display from the texture specified in
     <contents_texture_id>, in normalized coordinates.
-    <opacity> specifies the opacity of the CALayer.
     <background_color> specifies the background color of the CALayer, as a
     32-bit ARGB value.
     <edge_aa_mask> is a bitfield specifying which of the edges of the layer are
     to have anti-aliasing.
     <bounds_rect> contains four values indicating the x, y, width, and height of
     the layer in pixels.
-    <is_clipped> indicates if the layer should be clipped.
-    <clip_rect> contains four values indicating the x, y, width, and height of
-    the rectangle to clip the layer to, if it is to be clipped.
-    <transform> contains sixteen values indicating the row major order 4x4
-    transformation matrix to apply to the CALayer.
     <filter> will be used for both minification and magnification filtering. The
     only valid values are GL_LINEAR and GL_NEAREST.
 
     The command
 
        glScheduleCALayerInUseQueryCHROMIUM(GLsizei count, GLuint* textures);
 
     schedules a query at the time of the next call to swap buffers. If the given
     texture is backed by an IOSurface, then the query checks to see whether the
     IOSurface is in use by the Window Server. Otherwise, the query returns
@@ skipping 11 matching lines @@
     None.
 
 Revision History
 
     6/13/2016    Add glScheduleCALayerInUseQueryCHROMIUM.
     4/12/2016    Add a parameter to support minification and magnification
                  filtering.
     12/16/2015   Add clipping and edge anti-aliasing.
     11/7/2015    Initial checkin