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/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* This file contains the <code>PPB_Graphics2D_Dev</code> interface. */
[generate_thunk]
label Chrome {
M22 = 0.1,
M32 = 0.2
};
/**
* These options affect how the existing graphics context is displayed when a
* plugin is resized.
*/
[assert_size(4)]
enum PP_Graphics2D_Dev_ResizeMode {
/**
* In this mode, the context does not change size or offset. If the backing
* store is the same size as the plugin element, this will result in the
* pixels on the right side of the plugin element being unavailable, revealing
* the contents underneath it.
*/
PP_GRAPHICS2D_DEV_RESIZEMODE_DEFAULT,
/**
* In this mode, the context and its offset are scaled relative to how much
* the plugin element has been resized.
*/
PP_GRAPHICS2D_DEV_RESIZEMODE_STRETCH
};
/* PPB_Graphics2D_Dev interface */
interface PPB_Graphics2D_Dev {
/**
* SetScale() sets the scale factor that will be applied when painting the
* graphics context onto the output device. Typically, if rendering at device
* resolution is desired, the context would be created with the width and
* height scaled up by the view's GetDeviceScale and SetScale called with a
* scale of 1.0 / GetDeviceScale(). For example, if the view resource passed
* to DidChangeView has a rectangle of (w=200, h=100) and a device scale of
* 2.0, one would call Create with a size of (w=400, h=200) and then call
* SetScale with 0.5. One would then treat each pixel in the context as a
* single device pixel.
*
* @param[in] resource A <code>Graphics2D</code> context resource.
* @param[in] scale The scale to apply when painting.
*
* @return Returns <code>PP_TRUE</code> on success or <code>PP_FALSE</code> if
* the resource is invalid or the scale factor is 0 or less.
*/
PP_Bool SetScale(
[in] PP_Resource resource,
[in] float_t scale);
/***
* GetScale() gets the scale factor that will be applied when painting the
* graphics context onto the output device.
*
* @param[in] resource A <code>Graphics2D</code> context resource.
*
* @return Returns the scale factor for the graphics context. If the resource
* is not a valid <code>Graphics2D</code> context, this will return 0.0.
*/
float_t GetScale(
[in] PP_Resource resource);
/***
* Sets the offset into the plugin element at which the graphics context is
* painted. This allows a portion of the plugin element to be painted to.
* The new offset will only be applied after Flush() has been called.
*
* @param[in] resource A <code>Graphics2D</code> context resource.
* @param[in] offset The offset at which the context should be painted.
*/
[version=0.2]
void SetOffset(
[in] PP_Resource resource,
[in] PP_Point offset);
/***
* Sets the resize mode for the graphics context. When a plugin element is
* resized in the DOM, it takes time for the plugin to update the graphics
* context in the renderer. These options affect how the existing context is
* displayed until the backing store is updated by the plugin.
*
* @param[in] resource A <code>Graphics2D</code> context resource.
* @param[in] resize_mode The resize mode to change this context to.
*/
void SetResizeMode(
[in] PP_Resource resource,
[in] PP_Graphics2D_Dev_ResizeMode resize_mode);
};
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