gecko/layout/base/Units.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZ_UNITS_H_
#define MOZ_UNITS_H_
#include "mozilla/gfx/Point.h"
#include "nsDeviceContext.h"
namespace mozilla {
// The pixels that content authors use to specify sizes in.
struct CSSPixel {
static gfx::PointTyped<CSSPixel> FromAppUnits(const nsPoint &pt) {
return gfx::PointTyped<CSSPixel>(NSAppUnitsToFloatPixels(pt.x, float(nsDeviceContext::AppUnitsPerCSSPixel())),
NSAppUnitsToFloatPixels(pt.y, float(nsDeviceContext::AppUnitsPerCSSPixel())));
}
static nsPoint ToAppUnits(const gfx::PointTyped<CSSPixel> &pt) {
return nsPoint(NSFloatPixelsToAppUnits(pt.x, float(nsDeviceContext::AppUnitsPerCSSPixel())),
NSFloatPixelsToAppUnits(pt.y, float(nsDeviceContext::AppUnitsPerCSSPixel())));
}
static gfx::RectTyped<CSSPixel> FromAppUnits(const nsRect &rect) {
return gfx::RectTyped<CSSPixel>(NSAppUnitsToFloatPixels(rect.x, float(nsDeviceContext::AppUnitsPerCSSPixel())),
NSAppUnitsToFloatPixels(rect.y, float(nsDeviceContext::AppUnitsPerCSSPixel())),
NSAppUnitsToFloatPixels(rect.width, float(nsDeviceContext::AppUnitsPerCSSPixel())),
NSAppUnitsToFloatPixels(rect.height, float(nsDeviceContext::AppUnitsPerCSSPixel())));
}
};
typedef gfx::PointTyped<CSSPixel> CSSPoint;
typedef gfx::RectTyped<CSSPixel> CSSRect;
typedef gfx::IntRectTyped<CSSPixel> CSSIntRect;
struct LayerPixel {
static gfx::IntRectTyped<LayerPixel> FromCSSRectRoundOut(const CSSRect& rect, gfxFloat resolution) {
gfx::RectTyped<LayerPixel> scaled(rect.x, rect.y, rect.width, rect.height);
scaled.ScaleInverseRoundOut(resolution);
return gfx::IntRectTyped<LayerPixel>(scaled.x, scaled.y, scaled.width, scaled.height);
}
static CSSIntRect ToCSSIntRectRoundIn(const gfx::IntRectTyped<LayerPixel>& rect, gfxFloat resolution) {
gfx::IntRectTyped<CSSPixel> ret(rect.x, rect.y, rect.width, rect.height);
ret.ScaleInverseRoundIn(resolution, resolution);
return ret;
}
static CSSIntRect ToCSSIntRectRoundIn(const gfx::IntRectTyped<LayerPixel>& rect, gfxSize resolution) {
gfx::IntRectTyped<CSSPixel> ret(rect.x, rect.y, rect.width, rect.height);
ret.ScaleInverseRoundIn(resolution.width, resolution.height);
return ret;
}
};
typedef gfx::RectTyped<LayerPixel> LayerRect;
typedef gfx::IntRectTyped<LayerPixel> LayerIntRect;
};
#endif