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cfc792bc4c
MozReview-Commit-ID: D57bbW4pmPZ --HG-- extra : rebase_source : 9af2973a112c7ea641876c1f945797f2c7c945ce
95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_TextRenderer_H
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#define GFX_TextRenderer_H
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#include "mozilla/EnumeratedArray.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/UniquePtr.h"
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#include "nsISupportsImpl.h"
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#include <string>
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namespace mozilla {
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namespace layers {
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class Compositor;
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class TextureSource;
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class TextureSourceProvider;
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struct FontBitmapInfo;
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class TextRenderer
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{
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~TextRenderer();
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public:
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NS_INLINE_DECL_REFCOUNTING(TextRenderer)
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enum class FontType {
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Default,
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FixedWidth,
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NumTypes
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};
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explicit TextRenderer()
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{}
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RefPtr<TextureSource>
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RenderText(TextureSourceProvider* aProvider,
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const std::string& aText,
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uint32_t aTextSize,
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uint32_t aTargetPixelWidth,
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FontType aFontType);
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void RenderText(Compositor* aCompositor,
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const std::string& aText,
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const gfx::IntPoint& aOrigin,
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const gfx::Matrix4x4& aTransform, uint32_t aTextSize,
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uint32_t aTargetPixelWidth,
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FontType aFontType = FontType::Default);
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struct FontCache {
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~FontCache();
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RefPtr<gfx::DataSourceSurface> mGlyphBitmaps;
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gfx::DataSourceSurface::MappedSurface mMap;
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const FontBitmapInfo* mInfo;
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};
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protected:
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// Note that this may still fail to set mGlyphBitmaps to a valid value
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// if the underlying CreateDataSourceSurface fails for some reason.
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bool EnsureInitialized(FontType aType);
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static const FontBitmapInfo* GetFontInfo(FontType aType);
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private:
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EnumeratedArray<FontType, FontType::NumTypes, UniquePtr<FontCache>> mFonts;
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};
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struct FontBitmapInfo {
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Maybe<unsigned int> mGlyphWidth;
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Maybe<const unsigned short*> mGlyphWidths;
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unsigned int mTextureWidth;
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unsigned int mTextureHeight;
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unsigned int mCellWidth;
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unsigned int mCellHeight;
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unsigned int mFirstChar;
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const unsigned char* mPNG;
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size_t mPNGLength;
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unsigned int GetGlyphWidth(char aGlyph) const {
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if (mGlyphWidth) {
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return mGlyphWidth.value();
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}
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MOZ_ASSERT(unsigned(aGlyph) >= mFirstChar);
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return mGlyphWidths.value()[unsigned(aGlyph) - mFirstChar];
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}
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};
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} // namespace layers
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} // namespace mozilla
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#endif
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