dom/canvas/WebGLObjectModel.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef WEBGLOBJECTMODEL_H_
   7 #define WEBGLOBJECTMODEL_H_
   8
   9 #include "mozilla/RefCounted.h"
  10 #include "mozilla/WeakPtr.h"
  11 #include "WebGLTypes.h"
  12
  13 namespace mozilla {
  14
  15 class WebGLContext;
  16
  17 ////
  18
  19 // This class is a mixin for objects that are tied to a specific
  20 // context (which is to say, all of them).  They provide initialization
  21 // as well as comparison with the current context.
  22 class WebGLContextBoundObject : public VRefCounted {
  23  public:
  24   const WeakPtr<WebGLContext> mContext;
  25
  26   explicit WebGLContextBoundObject(WebGLContext* webgl);
  27
  28  private:
  29   friend class HostWebGLContext;
  30 };
  31
  32 ////
  33
  34 // this class is a mixin for GL objects that have dimensions
  35 // that we need to track.
  36 class WebGLRectangleObject {
  37  public:
  38   WebGLRectangleObject() : mWidth(0), mHeight(0) {}
  39
  40   WebGLRectangleObject(GLsizei width, GLsizei height)
  41       : mWidth(width), mHeight(height) {}
  42
  43   GLsizei Width() const { return mWidth; }
  44   void width(GLsizei value) { mWidth = value; }
  45
  46   GLsizei Height() const { return mHeight; }
  47   void height(GLsizei value) { mHeight = value; }
  48
  49   void setDimensions(GLsizei width, GLsizei height) {
  50     mWidth = width;
  51     mHeight = height;
  52   }
  53
  54   void setDimensions(WebGLRectangleObject* rect) {
  55     if (rect) {
  56       mWidth = rect->Width();
  57       mHeight = rect->Height();
  58     } else {
  59       mWidth = 0;
  60       mHeight = 0;
  61     }
  62   }
  63
  64   bool HasSameDimensionsAs(const WebGLRectangleObject& other) const {
  65     return Width() == other.Width() && Height() == other.Height();
  66   }
  67
  68  protected:
  69   GLsizei mWidth;
  70   GLsizei mHeight;
  71 };
  72
  73 }  // namespace mozilla
  74
  75 #endif