mirror of
https://github.com/thorvg/thorvg.git
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8212d6f0f9
1. convert mat4 directly from exist mat3, and remove unused calculation code. 2. since normalized position is only meaningful in vertex shader stage. use logical position in fragment shader stage for all gradient pipeline.
274 lines
7.3 KiB
C++
274 lines
7.3 KiB
C++
/*
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* Copyright (c) 2020 - 2023 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_GL_GEOMETRY_H_
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#define _TVG_GL_GEOMETRY_H_
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#include <math.h>
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#include <vector>
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#include "tvgGlCommon.h"
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#define PI 3.1415926535897932384626433832795f
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#define MVP_MATRIX() \
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float mvp[4*4] = { \
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2.f / w, 0.0, 0.0f, 0.0f, \
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0.0, -2.f / h, 0.0f, 0.0f, \
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0.0f, 0.0f, -1.f, 0.0f, \
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-1.f, 1.f, 0.0f, 1.0f \
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};
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#define MULTIPLY_MATRIX(A, B, transform) \
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for(auto i = 0; i < 4; ++i) \
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{ \
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for(auto j = 0; j < 4; ++j) \
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{ \
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float sum = 0.0; \
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for (auto k = 0; k < 4; ++k) \
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sum += A[k*4+i] * B[j*4+k]; \
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transform[j*4+i] = sum; \
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} \
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}
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/**
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* mat3x3 mat4x4
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*
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* [ e11 e12 e13 ] [ e11 e12 0 e13 ]
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* [ e21 e22 e23 ] => [ e21 e22 0 e23 ]
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* [ e31 e32 e33 ] [ 0 0 1 0 ]
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* [ e31 e32 0 e33 ]
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*
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*/
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// All GPU use 4x4 matrix with column major order
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#define GET_MATRIX44(mat3, mat4) \
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do { \
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mat4[0] = mat3.e11; \
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mat4[1] = mat3.e21; \
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mat4[2] = 0; \
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mat4[3] = mat3.e31; \
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mat4[4] = mat3.e12; \
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mat4[5] = mat3.e22; \
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mat4[6] = 0; \
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mat4[7] = mat3.e32; \
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mat4[8] = 0; \
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mat4[9] = 0; \
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mat4[10] = 1; \
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mat4[11] = 0; \
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mat4[12] = mat3.e13; \
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mat4[13] = mat3.e23; \
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mat4[14] = 0; \
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mat4[15] = mat3.e33; \
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} while (false)
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class GlPoint
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{
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public:
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float x = 0.0f;
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float y = 0.0f;
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GlPoint() = default;
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GlPoint(float pX, float pY):x(pX), y(pY)
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{
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}
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GlPoint(const Point& rhs):GlPoint(rhs.x, rhs.y)
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{
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}
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GlPoint(const GlPoint& rhs) = default;
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GlPoint(GlPoint&& rhs) = default;
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GlPoint& operator= (const GlPoint& rhs) = default;
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GlPoint& operator= (GlPoint&& rhs) = default;
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GlPoint& operator= (const Point& 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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bool operator== (const GlPoint& rhs)
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{
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if (&rhs == this) return true;
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if (rhs.x == this->x && rhs.y == this->y) return true;
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return false;
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}
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bool operator!= (const GlPoint& rhs)
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{
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if (&rhs == this) return true;
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if (rhs.x != this->x || rhs.y != this->y) return true;
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return false;
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}
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GlPoint operator+ (const GlPoint& rhs) const
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{
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return GlPoint(x + rhs.x, y + rhs.y);
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}
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GlPoint operator+ (const float c) const
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{
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return GlPoint(x + c, y + c);
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}
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GlPoint operator- (const GlPoint& rhs) const
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{
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return GlPoint(x - rhs.x, y - rhs.y);
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}
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GlPoint operator- (const float c) const
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{
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return GlPoint(x - c, y - c);
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}
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GlPoint operator* (const GlPoint& rhs) const
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{
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return GlPoint(x * rhs.x, y * rhs.y);
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}
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GlPoint operator* (const float c) const
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{
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return GlPoint(x * c, y * c);
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}
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GlPoint operator/ (const GlPoint& rhs) const
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{
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return GlPoint(x / rhs.x, y / rhs.y);
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}
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GlPoint operator/ (const float c) const
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{
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return GlPoint(x / c, y / c);
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}
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void mod()
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{
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x = fabsf(x);
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y = fabsf(y);
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}
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void normalize()
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{
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auto length = sqrtf((x * x) + (y * y));
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if (length != 0.0f) {
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const auto inverseLen = 1.0f / length;
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x *= inverseLen;
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y *= inverseLen;
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}
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}
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};
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typedef GlPoint GlSize;
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struct SmoothPoint
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{
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GlPoint orgPt;
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GlPoint fillOuterBlur;
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GlPoint fillOuter;
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GlPoint strokeOuterBlur;
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GlPoint strokeOuter;
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GlPoint strokeInnerBlur;
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GlPoint strokeInner;
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SmoothPoint(GlPoint pt)
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:orgPt(pt),
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fillOuterBlur(pt),
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fillOuter(pt),
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strokeOuterBlur(pt),
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strokeOuter(pt),
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strokeInnerBlur(pt),
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strokeInner(pt)
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{
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}
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};
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struct PointNormals
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{
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GlPoint normal1;
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GlPoint normal2;
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GlPoint normalF;
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};
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struct VertexData
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{
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GlPoint point;
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float opacity = 0.0f;
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};
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struct VertexDataArray
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{
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vector<VertexData> vertices;
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vector<uint32_t> indices;
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};
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struct GlPrimitive
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{
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vector<SmoothPoint> mAAPoints;
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VertexDataArray mFill;
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VertexDataArray mStroke;
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GlPoint mTopLeft;
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GlPoint mBottomRight;
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bool mIsClosed = false;
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};
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class GlGpuBuffer;
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class GlGeometry
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{
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public:
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~GlGeometry();
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uint32_t getPrimitiveCount();
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const GlSize getPrimitiveSize(const uint32_t primitiveIndex) const;
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bool decomposeOutline(const RenderShape& rshape);
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bool generateAAPoints(TVG_UNUSED const RenderShape& rshape, float strokeWd, RenderUpdateFlag flag);
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bool tesselate(TVG_UNUSED const RenderShape& rshape, float viewWd, float viewHt, RenderUpdateFlag flag);
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void disableVertex(uint32_t location);
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void draw(const uint32_t location, const uint32_t primitiveIndex, RenderUpdateFlag flag);
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void updateTransform(const RenderTransform* transform, float w, float h);
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float* getTransforMatrix();
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private:
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void addGeometryPoint(VertexDataArray &geometry, const GlPoint &pt, float viewWd, float viewHt, float opacity);
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GlPoint getNormal(const GlPoint &p1, const GlPoint &p2);
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float dotProduct(const GlPoint &p1, const GlPoint &p2);
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GlPoint extendEdge(const GlPoint &pt, const GlPoint &normal, float scalar);
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void addPoint(GlPrimitive& primitve, const GlPoint &pt, GlPoint &min, GlPoint &max);
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void addTriangleFanIndices(uint32_t &curPt, vector<uint32_t> &indices);
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void addQuadIndices(uint32_t &curPt, vector<uint32_t> &indices);
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bool isBezierFlat(const GlPoint &p1, const GlPoint &c1, const GlPoint &c2, const GlPoint &p2);
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void decomposeCubicCurve(GlPrimitive& primitve, const GlPoint &pt1, const GlPoint &cpt1, const GlPoint &cpt2, const GlPoint &pt2, GlPoint &min, GlPoint &max);
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void updateBuffer(const uint32_t location, const VertexDataArray& vertexArray);
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GLuint mVao = 0;
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std::unique_ptr<GlGpuBuffer> mVertexBuffer;
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std::unique_ptr<GlGpuBuffer> mIndexBuffer;
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vector<GlPrimitive> mPrimitives;
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float mTransform[16];
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};
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#endif /* _TVG_GL_GEOMETRY_H_ */
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