Bug 1313541 - ReadPixels webidl. - r=qdot

MozReview-Commit-ID: Ihq0JNEzLye

dom/webidl/WebGL2RenderingContext.webidl

@@ -320,13 +320,12 @@ interface WebGL2RenderingContext : WebGLRenderingContext
                            GLintptr writeOffset, GLsizeiptr size);
     void getBufferSubData(GLenum target, GLintptr offset, ArrayBufferView dstData);
 
-    [Throws] /* Throws on readback in a write-only context. */
+    [Throws] // Throws on readback in a write-only context.
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
                     GLenum type, GLintptr offset);
-    /* Include our WebGL 1 function override(s) */
-    [Throws]
+    [Throws] // Throws on readback in a write-only context.
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
-                    GLenum type, ArrayBufferView pixels);
+                    GLenum type, ArrayBufferView dstData, optional GLuint dstOffset = 0);
 
     /* Framebuffer objects */
     void blitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0,