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/* Copyright (c) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_FONT_RENDER_STYLE_H_
#define THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_FONT_RENDER_STYLE_H_
#include "SkFontStyle.h"
#include "SkFontTypes.h"
#include "SkPaint.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/skia/include/core/SkRefCnt.h"
class SkFont;
class SkFontMgr;
namespace blink {
// WebFontRenderStyle describes the user's preferences for rendering a font at a
// given size.
struct WebFontRenderStyle {
enum {
kNoPreference = 2,
};
WebFontRenderStyle() = default;
bool operator==(const WebFontRenderStyle& a) const {
return use_bitmaps == a.use_bitmaps && use_auto_hint == a.use_auto_hint &&
use_hinting == a.use_hinting && hint_style == a.hint_style &&
use_anti_alias == a.use_anti_alias &&
use_subpixel_rendering == a.use_subpixel_rendering &&
use_subpixel_positioning == a.use_subpixel_positioning;
}
BLINK_PLATFORM_EXPORT static void SetSkiaFontManager(sk_sp<SkFontMgr>);
BLINK_PLATFORM_EXPORT static void SetHinting(SkFontHinting);
BLINK_PLATFORM_EXPORT static void SetAutoHint(bool);
BLINK_PLATFORM_EXPORT static void SetUseBitmaps(bool);
BLINK_PLATFORM_EXPORT static void SetAntiAlias(bool);
BLINK_PLATFORM_EXPORT static void SetSubpixelRendering(bool);
BLINK_PLATFORM_EXPORT static void SetSubpixelPositioning(bool);
BLINK_PLATFORM_EXPORT static void SetSystemFontFamily(const WebString& name);
static WebFontRenderStyle GetDefault();
// Overrides fields with those from |other|, except the fields that are set to
// kNoPreference in |other|.
void OverrideWith(const WebFontRenderStyle& other);
void ApplyToSkFont(SkFont*, float device_scale_factor) const;
// Each of the use* members below can take one of three values:
// 0: off
// 1: on
// NoPreference: no preference expressed
char use_bitmaps = kNoPreference; // use embedded bitmap strike if possible
char use_auto_hint = kNoPreference; // use 'auto' hinting (FreeType specific)
char use_hinting = kNoPreference; // hint glyphs to the pixel grid
char hint_style = 0; // level of hinting, 0..3
char use_anti_alias = kNoPreference; // antialias glyph shapes
// use subpixel rendering (partially-filled pixels)
char use_subpixel_rendering = kNoPreference;
// use subpixel positioning (fractional X positions for glyphs)
char use_subpixel_positioning = kNoPreference;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_PUBLIC_PLATFORM_WEB_FONT_RENDER_STYLE_H_
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