mirror of
https://github.com/thorvg/thorvg.git
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572 lines
19 KiB
C++
572 lines
19 KiB
C++
/*
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* Copyright (c) 2020 - 2024 the ThorVG project. All rights reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _TVG_SW_COMMON_H_
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#define _TVG_SW_COMMON_H_
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#include <algorithm>
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#include "tvgCommon.h"
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#include "tvgRender.h"
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#define SW_CURVE_TYPE_POINT 0
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#define SW_CURVE_TYPE_CUBIC 1
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#define SW_ANGLE_PI (180L << 16)
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#define SW_ANGLE_2PI (SW_ANGLE_PI << 1)
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#define SW_ANGLE_PI2 (SW_ANGLE_PI >> 1)
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using SwCoord = signed long;
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using SwFixed = signed long long;
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static inline float TO_FLOAT(SwCoord val)
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{
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return static_cast<float>(val) / 64.0f;
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}
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struct SwPoint
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{
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SwCoord x, y;
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SwPoint& operator+=(const SwPoint& rhs)
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{
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x += rhs.x;
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y += rhs.y;
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return *this;
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}
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SwPoint operator+(const SwPoint& rhs) const
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{
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return {x + rhs.x, y + rhs.y};
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}
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SwPoint operator-(const SwPoint& rhs) const
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{
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return {x - rhs.x, y - rhs.y};
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}
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bool operator==(const SwPoint& rhs) const
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{
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return (x == rhs.x && y == rhs.y);
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}
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bool operator!=(const SwPoint& rhs) const
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{
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return (x != rhs.x || y != rhs.y);
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}
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bool zero() const
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{
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if (x == 0 && y == 0) return true;
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else return false;
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}
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bool small() const
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{
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//2 is epsilon...
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if (abs(x) < 2 && abs(y) < 2) return true;
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else return false;
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}
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Point toPoint() const
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{
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return {TO_FLOAT(x), TO_FLOAT(y)};
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}
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};
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struct SwSize
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{
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SwCoord w, h;
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};
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struct SwOutline
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{
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Array<SwPoint> pts; //the outline's points
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Array<uint32_t> cntrs; //the contour end points
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Array<uint8_t> types; //curve type
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Array<bool> closed; //opened or closed path?
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FillRule fillRule;
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};
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struct SwSpan
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{
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uint16_t x, y;
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uint16_t len;
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uint8_t coverage;
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};
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struct SwRle
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{
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SwSpan *spans;
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uint32_t alloc;
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uint32_t size;
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};
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struct SwBBox
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{
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SwPoint min, max;
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void reset()
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{
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min.x = min.y = max.x = max.y = 0;
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}
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};
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struct SwFill
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{
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struct SwLinear {
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float dx, dy;
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float len;
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float offset;
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};
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struct SwRadial {
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float a11, a12, a13;
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float a21, a22, a23;
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float fx, fy, fr;
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float dx, dy, dr;
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float invA, a;
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};
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union {
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SwLinear linear;
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SwRadial radial;
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};
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uint32_t* ctable;
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FillSpread spread;
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bool translucent;
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};
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struct SwStrokeBorder
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{
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uint32_t ptsCnt;
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uint32_t maxPts;
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SwPoint* pts;
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uint8_t* tags;
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int32_t start; //index of current sub-path start point
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bool movable; //true: for ends of lineto borders
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};
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struct SwStroke
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{
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SwFixed angleIn;
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SwFixed angleOut;
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SwPoint center;
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SwFixed lineLength;
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SwFixed subPathAngle;
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SwPoint ptStartSubPath;
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SwFixed subPathLineLength;
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SwFixed width;
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SwFixed miterlimit;
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SwFill* fill = nullptr;
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SwStrokeBorder borders[2];
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float sx, sy;
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StrokeCap cap;
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StrokeJoin join;
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StrokeJoin joinSaved;
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bool firstPt;
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bool closedSubPath;
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bool handleWideStrokes;
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};
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struct SwDashStroke
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{
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SwOutline* outline = nullptr;
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float curLen = 0;
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int32_t curIdx = 0;
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Point ptStart = {0, 0};
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Point ptCur = {0, 0};
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float* pattern = nullptr;
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uint32_t cnt = 0;
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bool curOpGap = false;
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bool move = true;
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};
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struct SwShape
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{
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SwOutline* outline = nullptr;
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SwStroke* stroke = nullptr;
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SwFill* fill = nullptr;
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SwRle* rle = nullptr;
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SwRle* strokeRle = nullptr;
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SwBBox bbox; //Keep it boundary without stroke region. Using for optimal filling.
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bool fastTrack = false; //Fast Track: axis-aligned rectangle without any clips?
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};
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struct SwImage
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{
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SwOutline* outline = nullptr;
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SwRle* rle = nullptr;
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union {
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pixel_t* data; //system based data pointer
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uint32_t* buf32; //for explicit 32bits channels
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uint8_t* buf8; //for explicit 8bits grayscale
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};
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uint32_t w, h, stride;
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int32_t ox = 0; //offset x
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int32_t oy = 0; //offset y
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float scale;
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uint8_t channelSize;
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bool direct = false; //draw image directly (with offset)
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bool scaled = false; //draw scaled image
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};
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typedef uint8_t(*SwMask)(uint8_t s, uint8_t d, uint8_t a); //src, dst, alpha
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typedef uint32_t(*SwBlender)(uint32_t s, uint32_t d, uint8_t a); //src, dst, alpha
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typedef uint32_t(*SwJoin)(uint8_t r, uint8_t g, uint8_t b, uint8_t a); //color channel join
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typedef uint8_t(*SwAlpha)(uint8_t*); //blending alpha
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struct SwCompositor;
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struct SwSurface : Surface
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{
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SwJoin join;
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SwAlpha alphas[4]; //Alpha:2, InvAlpha:3, Luma:4, InvLuma:5
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SwBlender blender = nullptr; //blender (optional)
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SwCompositor* compositor = nullptr; //compositor (optional)
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BlendMethod blendMethod; //blending method (uint8_t)
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SwAlpha alpha(CompositeMethod method)
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{
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auto idx = (int)(method) - 2; //0: None, 1: ClipPath
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return alphas[idx > 3 ? 0 : idx]; //CompositeMethod has only four Matting methods.
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}
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SwSurface()
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{
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}
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SwSurface(const SwSurface* rhs) : Surface(rhs)
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{
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join = rhs->join;
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memcpy(alphas, rhs->alphas, sizeof(alphas));
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blender = rhs->blender;
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compositor = rhs->compositor;
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blendMethod = rhs->blendMethod;
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}
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};
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struct SwCompositor : Compositor
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{
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SwSurface* recoverSfc; //Recover surface when composition is started
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SwCompositor* recoverCmp; //Recover compositor when composition is done
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SwImage image;
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SwBBox bbox;
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bool valid;
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};
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struct SwMpool
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{
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SwOutline* outline;
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SwOutline* strokeOutline;
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SwOutline* dashOutline;
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unsigned allocSize;
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};
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static inline SwCoord TO_SWCOORD(float val)
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{
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return SwCoord(val * 64.0f);
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}
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static inline uint32_t JOIN(uint8_t c0, uint8_t c1, uint8_t c2, uint8_t c3)
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{
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return (c0 << 24 | c1 << 16 | c2 << 8 | c3);
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}
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static inline uint32_t ALPHA_BLEND(uint32_t c, uint32_t a)
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{
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++a;
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return (((((c >> 8) & 0x00ff00ff) * a) & 0xff00ff00) + ((((c & 0x00ff00ff) * a) >> 8) & 0x00ff00ff));
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}
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static inline uint32_t INTERPOLATE(uint32_t s, uint32_t d, uint8_t a)
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{
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return (((((((s >> 8) & 0xff00ff) - ((d >> 8) & 0xff00ff)) * a) + (d & 0xff00ff00)) & 0xff00ff00) + ((((((s & 0xff00ff) - (d & 0xff00ff)) * a) >> 8) + (d & 0xff00ff)) & 0xff00ff));
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}
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static inline uint8_t INTERPOLATE8(uint8_t s, uint8_t d, uint8_t a)
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{
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return (((s) * (a) + 0xff) >> 8) + (((d) * ~(a) + 0xff) >> 8);
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}
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static inline SwCoord HALF_STROKE(float width)
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{
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return TO_SWCOORD(width * 0.5f);
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}
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static inline uint8_t A(uint32_t c)
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{
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return ((c) >> 24);
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}
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static inline uint8_t IA(uint32_t c)
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{
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return (~(c) >> 24);
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}
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static inline uint8_t C1(uint32_t c)
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{
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return ((c) >> 16);
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}
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static inline uint8_t C2(uint32_t c)
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{
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return ((c) >> 8);
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}
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static inline uint8_t C3(uint32_t c)
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{
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return (c);
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}
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static inline uint32_t opBlendInterp(uint32_t s, uint32_t d, uint8_t a)
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{
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return INTERPOLATE(s, d, a);
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}
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static inline uint32_t opBlendNormal(uint32_t s, uint32_t d, uint8_t a)
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{
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auto t = ALPHA_BLEND(s, a);
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return t + ALPHA_BLEND(d, IA(t));
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}
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static inline uint32_t opBlendPreNormal(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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return s + ALPHA_BLEND(d, IA(s));
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}
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static inline uint32_t opBlendSrcOver(uint32_t s, TVG_UNUSED uint32_t d, TVG_UNUSED uint8_t a)
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{
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return s;
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}
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//TODO: BlendMethod could remove the alpha parameter.
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static inline uint32_t opBlendDifference(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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//if (s > d) => s - d
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//else => d - s
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auto c1 = (C1(s) > C1(d)) ? (C1(s) - C1(d)) : (C1(d) - C1(s));
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auto c2 = (C2(s) > C2(d)) ? (C2(s) - C2(d)) : (C2(d) - C2(s));
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auto c3 = (C3(s) > C3(d)) ? (C3(s) - C3(d)) : (C3(d) - C3(s));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendExclusion(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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//A + B - 2AB
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auto c1 = std::min(255, C1(s) + C1(d) - std::min(255, (C1(s) * C1(d)) << 1));
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auto c2 = std::min(255, C2(s) + C2(d) - std::min(255, (C2(s) * C2(d)) << 1));
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auto c3 = std::min(255, C3(s) + C3(d) - std::min(255, (C3(s) * C3(d)) << 1));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendAdd(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// s + d
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auto c1 = std::min(C1(s) + C1(d), 255);
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auto c2 = std::min(C2(s) + C2(d), 255);
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auto c3 = std::min(C3(s) + C3(d), 255);
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendScreen(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// s + d - s * d
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auto c1 = C1(s) + C1(d) - MULTIPLY(C1(s), C1(d));
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auto c2 = C2(s) + C2(d) - MULTIPLY(C2(s), C2(d));
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auto c3 = C3(s) + C3(d) - MULTIPLY(C3(s), C3(d));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendMultiply(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// s * d
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auto c1 = MULTIPLY(C1(s), C1(d));
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auto c2 = MULTIPLY(C2(s), C2(d));
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auto c3 = MULTIPLY(C3(s), C3(d));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendOverlay(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// if (2 * d < da) => 2 * s * d,
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// else => 1 - 2 * (1 - s) * (1 - d)
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auto c1 = (C1(d) < 128) ? std::min(255, 2 * MULTIPLY(C1(s), C1(d))) : (255 - std::min(255, 2 * MULTIPLY(255 - C1(s), 255 - C1(d))));
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auto c2 = (C2(d) < 128) ? std::min(255, 2 * MULTIPLY(C2(s), C2(d))) : (255 - std::min(255, 2 * MULTIPLY(255 - C2(s), 255 - C2(d))));
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auto c3 = (C3(d) < 128) ? std::min(255, 2 * MULTIPLY(C3(s), C3(d))) : (255 - std::min(255, 2 * MULTIPLY(255 - C3(s), 255 - C3(d))));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendDarken(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// min(s, d)
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auto c1 = std::min(C1(s), C1(d));
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auto c2 = std::min(C2(s), C2(d));
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auto c3 = std::min(C3(s), C3(d));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendLighten(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// max(s, d)
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auto c1 = std::max(C1(s), C1(d));
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auto c2 = std::max(C2(s), C2(d));
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auto c3 = std::max(C3(s), C3(d));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendColorDodge(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// d / (1 - s)
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auto is = 0xffffffff - s;
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auto c1 = (C1(is) > 0) ? (C1(d) / C1(is)) : C1(d);
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auto c2 = (C2(is) > 0) ? (C2(d) / C2(is)) : C2(d);
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auto c3 = (C3(is) > 0) ? (C3(d) / C3(is)) : C3(d);
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendColorBurn(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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// 1 - (1 - d) / s
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auto id = 0xffffffff - d;
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auto c1 = 255 - ((C1(s) > 0) ? (C1(id) / C1(s)) : C1(id));
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auto c2 = 255 - ((C2(s) > 0) ? (C2(id) / C2(s)) : C2(id));
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auto c3 = 255 - ((C3(s) > 0) ? (C3(id) / C3(s)) : C3(id));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendHardLight(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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auto c1 = (C1(s) < 128) ? std::min(255, 2 * MULTIPLY(C1(s), C1(d))) : (255 - std::min(255, 2 * MULTIPLY(255 - C1(s), 255 - C1(d))));
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auto c2 = (C2(s) < 128) ? std::min(255, 2 * MULTIPLY(C2(s), C2(d))) : (255 - std::min(255, 2 * MULTIPLY(255 - C2(s), 255 - C2(d))));
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auto c3 = (C3(s) < 128) ? std::min(255, 2 * MULTIPLY(C3(s), C3(d))) : (255 - std::min(255, 2 * MULTIPLY(255 - C3(s), 255 - C3(d))));
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return JOIN(255, c1, c2, c3);
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}
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static inline uint32_t opBlendSoftLight(uint32_t s, uint32_t d, TVG_UNUSED uint8_t a)
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{
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//(255 - 2 * s) * (d * d) + (2 * s * b)
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auto c1 = std::min(255, MULTIPLY(255 - std::min(255, 2 * C1(s)), MULTIPLY(C1(d), C1(d))) + 2 * MULTIPLY(C1(s), C1(d)));
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auto c2 = std::min(255, MULTIPLY(255 - std::min(255, 2 * C2(s)), MULTIPLY(C2(d), C2(d))) + 2 * MULTIPLY(C2(s), C2(d)));
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auto c3 = std::min(255, MULTIPLY(255 - std::min(255, 2 * C3(s)), MULTIPLY(C3(d), C3(d))) + 2 * MULTIPLY(C3(s), C3(d)));
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return JOIN(255, c1, c2, c3);
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}
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int64_t mathMultiply(int64_t a, int64_t b);
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int64_t mathDivide(int64_t a, int64_t b);
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int64_t mathMulDiv(int64_t a, int64_t b, int64_t c);
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void mathRotate(SwPoint& pt, SwFixed angle);
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SwFixed mathTan(SwFixed angle);
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SwFixed mathAtan(const SwPoint& pt);
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SwFixed mathCos(SwFixed angle);
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SwFixed mathSin(SwFixed angle);
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void mathSplitCubic(SwPoint* base);
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SwFixed mathDiff(SwFixed angle1, SwFixed angle2);
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SwFixed mathLength(const SwPoint& pt);
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bool mathSmallCubic(const SwPoint* base, SwFixed& angleIn, SwFixed& angleMid, SwFixed& angleOut);
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SwFixed mathMean(SwFixed angle1, SwFixed angle2);
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SwPoint mathTransform(const Point* to, const Matrix* transform);
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bool mathUpdateOutlineBBox(const SwOutline* outline, const SwBBox& clipRegion, SwBBox& renderRegion, bool fastTrack);
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bool mathClipBBox(const SwBBox& clipper, SwBBox& clippee);
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void shapeReset(SwShape* shape);
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bool shapePrepare(SwShape* shape, const RenderShape* rshape, const Matrix* transform, const SwBBox& clipRegion, SwBBox& renderRegion, SwMpool* mpool, unsigned tid, bool hasComposite);
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bool shapePrepared(const SwShape* shape);
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bool shapeGenRle(SwShape* shape, const RenderShape* rshape, bool antiAlias);
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void shapeDelOutline(SwShape* shape, SwMpool* mpool, uint32_t tid);
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void shapeResetStroke(SwShape* shape, const RenderShape* rshape, const Matrix* transform);
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bool shapeGenStrokeRle(SwShape* shape, const RenderShape* rshape, const Matrix* transform, const SwBBox& clipRegion, SwBBox& renderRegion, SwMpool* mpool, unsigned tid);
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void shapeFree(SwShape* shape);
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void shapeDelStroke(SwShape* shape);
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bool shapeGenFillColors(SwShape* shape, const Fill* fill, const Matrix* transform, SwSurface* surface, uint8_t opacity, bool ctable);
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bool shapeGenStrokeFillColors(SwShape* shape, const Fill* fill, const Matrix* transform, SwSurface* surface, uint8_t opacity, bool ctable);
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void shapeResetFill(SwShape* shape);
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void shapeResetStrokeFill(SwShape* shape);
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void shapeDelFill(SwShape* shape);
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void shapeDelStrokeFill(SwShape* shape);
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void strokeReset(SwStroke* stroke, const RenderShape* shape, const Matrix* transform);
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bool strokeParseOutline(SwStroke* stroke, const SwOutline& outline);
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SwOutline* strokeExportOutline(SwStroke* stroke, SwMpool* mpool, unsigned tid);
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void strokeFree(SwStroke* stroke);
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bool imagePrepare(SwImage* image, const RenderMesh* mesh, const Matrix* transform, const SwBBox& clipRegion, SwBBox& renderRegion, SwMpool* mpool, unsigned tid);
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bool imageGenRle(SwImage* image, const SwBBox& renderRegion, bool antiAlias);
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void imageDelOutline(SwImage* image, SwMpool* mpool, uint32_t tid);
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void imageReset(SwImage* image);
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void imageFree(SwImage* image);
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bool fillGenColorTable(SwFill* fill, const Fill* fdata, const Matrix* transform, SwSurface* surface, uint8_t opacity, bool ctable);
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|
void fillReset(SwFill* fill);
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|
void fillFree(SwFill* fill);
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//OPTIMIZE_ME: Skip the function pointer access
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void fillLinear(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, SwMask maskOp, uint8_t opacity); //composite masking ver.
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void fillLinear(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwMask maskOp, uint8_t opacity); //direct masking ver.
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void fillLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, uint8_t a); //blending ver.
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void fillLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, SwBlender op2, uint8_t a); //blending + BlendingMethod(op2) ver.
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void fillLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwAlpha alpha, uint8_t csize, uint8_t opacity); //matting ver.
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|
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void fillRadial(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, SwMask op, uint8_t a); //composite masking ver.
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|
void fillRadial(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwMask op, uint8_t a) ; //direct masking ver.
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|
void fillRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, uint8_t a); //blending ver.
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|
void fillRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, SwBlender op2, uint8_t a); //blending + BlendingMethod(op2) ver.
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|
void fillRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwAlpha alpha, uint8_t csize, uint8_t opacity); //matting ver.
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|
|
|
SwRle* rleRender(SwRle* rle, const SwOutline* outline, const SwBBox& renderRegion, bool antiAlias);
|
|
SwRle* rleRender(const SwBBox* bbox);
|
|
void rleFree(SwRle* rle);
|
|
void rleReset(SwRle* rle);
|
|
void rleMerge(SwRle* rle, SwRle* clip1, SwRle* clip2);
|
|
void rleClipPath(SwRle* rle, const SwRle* clip);
|
|
void rleClipRect(SwRle* rle, const SwBBox* clip);
|
|
|
|
SwMpool* mpoolInit(uint32_t threads);
|
|
bool mpoolTerm(SwMpool* mpool);
|
|
bool mpoolClear(SwMpool* mpool);
|
|
SwOutline* mpoolReqOutline(SwMpool* mpool, unsigned idx);
|
|
void mpoolRetOutline(SwMpool* mpool, unsigned idx);
|
|
SwOutline* mpoolReqStrokeOutline(SwMpool* mpool, unsigned idx);
|
|
void mpoolRetStrokeOutline(SwMpool* mpool, unsigned idx);
|
|
SwOutline* mpoolReqDashOutline(SwMpool* mpool, unsigned idx);
|
|
void mpoolRetDashOutline(SwMpool* mpool, unsigned idx);
|
|
|
|
bool rasterCompositor(SwSurface* surface);
|
|
bool rasterGradientShape(SwSurface* surface, SwShape* shape, Type type);
|
|
bool rasterShape(SwSurface* surface, SwShape* shape, uint8_t r, uint8_t g, uint8_t b, uint8_t a);
|
|
bool rasterImage(SwSurface* surface, SwImage* image, const RenderMesh* mesh, const Matrix* transform, const SwBBox& bbox, uint8_t opacity);
|
|
bool rasterStroke(SwSurface* surface, SwShape* shape, uint8_t r, uint8_t g, uint8_t b, uint8_t a);
|
|
bool rasterGradientStroke(SwSurface* surface, SwShape* shape, Type type);
|
|
bool rasterClear(SwSurface* surface, uint32_t x, uint32_t y, uint32_t w, uint32_t h);
|
|
void rasterPixel32(uint32_t *dst, uint32_t val, uint32_t offset, int32_t len);
|
|
void rasterGrayscale8(uint8_t *dst, uint8_t val, uint32_t offset, int32_t len);
|
|
void rasterUnpremultiply(Surface* surface);
|
|
void rasterPremultiply(Surface* surface);
|
|
bool rasterConvertCS(Surface* surface, ColorSpace to);
|
|
|
|
#endif /* _TVG_SW_COMMON_H_ */
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