ac10a2d039
git-svn-id: http://skia.googlecode.com/svn/trunk@649 2bbb7eff-a529-9590-31e7-b0007b416f81
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/*
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Copyright 2010 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef GrGlyph_DEFINED
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#define GrGlyph_DEFINED
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#include "GrPath.h"
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#include "GrRect.h"
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class GrAtlas;
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/* Need this to be quad-state:
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- complete w/ image
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- just metrics
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- failed to get image, but has metrics
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- failed to get metrics
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*/
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struct GrGlyph {
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typedef uint32_t PackedID;
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GrAtlas* fAtlas;
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GrPath* fPath;
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PackedID fPackedID;
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GrIRect16 fBounds;
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GrIPoint16 fAtlasLocation;
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void init(GrGlyph::PackedID packed, const GrIRect& bounds) {
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fAtlas = NULL;
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fPath = NULL;
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fPackedID = packed;
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fBounds.set(bounds);
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fAtlasLocation.set(0, 0);
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}
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void free() {
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if (fPath) {
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delete fPath;
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fPath = NULL;
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}
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}
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int width() const { return fBounds.width(); }
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int height() const { return fBounds.height(); }
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bool isEmpty() const { return fBounds.isEmpty(); }
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uint16_t glyphID() const { return UnpackID(fPackedID); }
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///////////////////////////////////////////////////////////////////////////
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static inline unsigned ExtractSubPixelBitsFromFixed(GrFixed pos) {
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// two most significant fraction bits from fixed-point
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return (pos >> 14) & 3;
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}
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static inline PackedID Pack(uint16_t glyphID, GrFixed x, GrFixed y) {
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x = ExtractSubPixelBitsFromFixed(x);
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y = ExtractSubPixelBitsFromFixed(y);
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return (x << 18) | (y << 16) | glyphID;
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}
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static inline GrFixed UnpackFixedX(PackedID packed) {
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return ((packed >> 18) & 3) << 14;
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}
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static inline GrFixed UnpackFixedY(PackedID packed) {
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return ((packed >> 16) & 3) << 14;
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}
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static inline uint16_t UnpackID(PackedID packed) {
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return (uint16_t)packed;
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}
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};
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#endif
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