author | Matt Plumtree <matt.plumtree@nokia.com> |
Thu, 16 Sep 2010 09:43:14 +0100 | |
branch | bug235_bringup_0 |
changeset 20 | d2d6724aef32 |
child 24 | a3f46bb01be2 |
permissions | -rw-r--r-- |
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#ifndef __RIRASTERIZER_H |
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#define __RIRASTERIZER_H |
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|
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/*------------------------------------------------------------------------ |
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* |
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* OpenVG 1.1 Reference Implementation |
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* ----------------------------------- |
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* |
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* Copyright (c) 2007 The Khronos Group Inc. |
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* Portions copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and /or associated documentation files |
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* (the "Materials "), to deal in the Materials without restriction, |
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* including without limitation the rights to use, copy, modify, merge, |
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* publish, distribute, sublicense, and/or sell copies of the Materials, |
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* and to permit persons to whom the Materials are furnished to do so, |
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* subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included |
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* in all copies or substantial portions of the Materials. |
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* |
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR |
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* THE USE OR OTHER DEALINGS IN THE MATERIALS. |
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* |
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*//** |
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* \file |
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* \brief Rasterizer class. |
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* \note |
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*//*-------------------------------------------------------------------*/ |
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#ifndef __RIMATH_H |
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#include "riMath.h" |
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#endif |
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#ifndef __RIARRAY_H |
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#include "riArray.h" |
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#endif |
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#ifndef __RIPIXELPIPE_H |
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#include "riPixelPipe.h" |
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#endif |
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// TESTING ONLY!! |
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#include "sfDynamicPixelPipe.h" |
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#if defined(RI_DEBUG) |
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# include <stdio.h> |
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#endif |
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// \todo SSE2 probably has everything necessary and matches the minimum platform requirements. |
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// SSE4 is probably too new. SSE3? |
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// \note This will cause the code to not compile on MSVC... |
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#define USE_SSE2 |
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#if defined(USE_SSE2) |
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// \todo only the last include is needed: QT creator does not find types if others not included. |
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# include <mmintrin.h> |
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# include <xmmintrin.h> |
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# include <emmintrin.h> |
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#endif |
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//======================================================================= |
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namespace OpenVGRI |
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{ |
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/*-------------------------------------------------------------------*//*! |
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* \brief Scalar and vector data types used by the rasterizer. |
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* \param |
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* \return |
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* \note |
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*//*-------------------------------------------------------------------*/ |
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typedef RIfloat RScalar; //change this if you want to have different precision for rasterizer scalars and RIfloat |
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struct RVector2 |
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{ |
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RI_INLINE RVector2() { } |
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RI_INLINE RVector2(const Vector2& v) { x = v.x; y = v.y; } |
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RI_INLINE RVector2(RIfloat vx, RIfloat vy) { x = vx; y = vy; } |
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RI_INLINE void set(RIfloat vx, RIfloat vy) { x = vx; y = vy; } |
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RScalar x; |
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RScalar y; |
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}; |
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struct IVector2 |
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{ |
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RI_INLINE IVector2() {} |
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RI_INLINE IVector2(const IVector2& v) { x = v.x; y = v.y; } |
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RI_INLINE IVector2(const Vector2& v) { x = (int)v.x; y = (int) v.y; } |
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RI_INLINE IVector2(int vx, int vy) { x = vx; y = vy; } |
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RI_INLINE void set(int vx, int vy) { x = vx; y = vy; } |
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int x; |
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int y; |
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}; |
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struct Span |
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{ |
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RIuint16 x0; |
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RIuint16 y; |
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106 |
RIuint16 len; |
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107 |
RIuint8 coverage; |
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RIuint8 pad; // align to 8 bytes. \temp Use qualifiers instead? |
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109 |
}; |
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110 |
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111 |
/*-------------------------------------------------------------------*//*! |
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* \brief Converts a set of edges to coverage values for each pixel and |
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* calls PixelPipe::pixelPipe for painting a pixel. |
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114 |
* \param |
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115 |
* \return |
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116 |
* \note |
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*//*-------------------------------------------------------------------*/ |
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118 |
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class Rasterizer |
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120 |
{ |
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121 |
public: |
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Rasterizer(); //throws bad_alloc |
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~Rasterizer(); |
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124 |
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void setup(int vpx, int vpy, int vpwidth, int vpheight, VGFillRule fillRule, const PixelPipe* pixelPipe); |
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126 |
void setScissor(const Array<Rectangle>& scissors); //throws bad_alloc |
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void setScissoring(bool enabled); |
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128 |
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void clear(); |
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130 |
void addEdge(const Vector2& v0, const Vector2& v1); //throws bad_alloc |
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131 |
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RI_INLINE void setAntiAliasing(bool enable) { m_aa = enable; } |
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void fill(); //throws bad_alloc |
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134 |
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135 |
void getBBox(int& sx, int& sy, int& ex, int& ey) const { sx = m_covMinx; sy = m_covMiny; ex = m_covMaxx; ey = m_covMaxy; } |
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136 |
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137 |
public: |
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138 |
enum { SAMPLE_BITS = 3 }; |
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enum { Y_BITS = SAMPLE_BITS }; |
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enum { MAX_COVERAGE = 1<<SAMPLE_BITS }; |
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141 |
|
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142 |
// temp!: |
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143 |
RIuint32 *m_covBuffer; |
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144 |
size_t m_covBufferSz; |
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145 |
|
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146 |
private: |
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Rasterizer(const Rasterizer&); //!< Not allowed. |
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const Rasterizer& operator=(const Rasterizer&); //!< Not allowed. |
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149 |
|
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150 |
public: |
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151 |
struct ScissorEdge |
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152 |
{ |
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153 |
ScissorEdge() {} |
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bool operator<(const ScissorEdge& e) const { return x < e.x; } |
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155 |
int x; |
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156 |
int miny; |
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157 |
int maxy; |
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158 |
int direction; //1 start, -1 end |
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159 |
}; |
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160 |
|
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161 |
struct Edge |
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162 |
{ |
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Edge() {} |
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bool operator<(const Edge& e) const { return v0.y < e.v0.y; } |
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165 |
#if defined(RI_DEBUG) |
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bool operator<=(const Edge& e) const {return v0.y <= e.v0.y; } |
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167 |
#endif |
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168 |
IVector2 v0; |
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169 |
IVector2 v1; |
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int direction; |
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171 |
}; |
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172 |
|
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struct ActiveEdge |
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174 |
{ |
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175 |
typedef RIint16 XCoord; |
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typedef RIint16 YCoord; |
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177 |
|
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ActiveEdge() {} |
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//bool operator<(const ActiveEdge& e) const { return minx < e.minx; } |
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bool operator<(const ActiveEdge& e) const |
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181 |
{ |
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182 |
if (minx < e.minx) |
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return true; |
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184 |
if (minx == e.minx) |
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return maxx < e.maxx; |
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return false; |
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187 |
} |
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188 |
#if defined(RI_DEBUG) |
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189 |
bool operator<=(const ActiveEdge& e) const { return minx <= e.minx; } |
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190 |
#endif |
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191 |
// Fixed-point edge coordinates. |
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RIuint32 next; // \todo Pointer? |
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193 |
int direction; //-1 down, 1 up |
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194 |
int xRef; |
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int slope; |
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196 |
XCoord minx; // for the current scanline |
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XCoord maxx; // for the current scanline |
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YCoord yStart; // for the edge |
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YCoord yEnd; // for the edge |
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200 |
}; |
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201 |
|
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202 |
enum { SF_SAMPLES = 8 }; |
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203 |
enum { RASTERIZER_BITS = 14 }; |
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enum { RASTERIZER_MASK = ((1<<RASTERIZER_BITS)-1) }; |
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205 |
enum { Y_MASK = ((1<<Y_BITS)-1) }; |
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206 |
enum { X_BITS = 7 }; |
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enum { XMASK = ((1<<X_BITS)-1) }; |
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208 |
enum { LEFT_DISCARD = -0x100000 }; |
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enum { LEFT_DISCARD_SHORT = -32768 }; |
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210 |
|
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211 |
struct Windings |
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{ |
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#if !defined(USE_SSE2) |
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Windings() {wq = 0;} |
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// \todo Use SSE counters or packed counters! |
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// \todo 8 samples -> 64 bits == 2 32-bit uints |
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union |
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{ |
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RIint8 winding[SF_SAMPLES]; |
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RIuint32 wd[SF_SAMPLES/4]; |
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unsigned long long wq; |
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}; |
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#else |
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Windings() { sseWinding = _mm_setzero_si128(); } |
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__m128i sseWinding; |
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#endif |
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}; |
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|
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private: |
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void pushEdge(const Edge& edge); |
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void clipAndAddEdge(Edge& edge); |
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void addBBox(const IVector2& v); |
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RI_INLINE void pushSpan(int x, int y, int len, int coverage); |
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RI_INLINE void commitSpans(); |
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//RI_INLINE void calculateAEWinding(const ActiveEdge& currAe, Windings& pixel, Windings& scanline, int intY, int pixelX); |
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Array<ActiveEdge> m_edgePool; |
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Array<RIuint32> m_edges; |
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Array<ScissorEdge> m_scissorEdges; |
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Array<ActiveEdge> m_aet; |
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Array<ScissorEdge> m_scissorAet; |
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bool m_scissor; |
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bool m_aa; |
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IVector2 m_edgeMin; |
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IVector2 m_edgeMax; |
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int m_covMinx; |
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int m_covMiny; |
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int m_covMaxx; |
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int m_covMaxy; |
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int m_vpx; |
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int m_vpy; |
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int m_vpwidth; |
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int m_vpheight; |
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int m_vpMinx; |
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int m_vpMiny; |
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int m_vpMaxx; |
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int m_vpMaxy; |
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VGFillRule m_fillRule; |
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RIuint32 m_fillRuleMask; |
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const PixelPipe* m_pixelPipe; |
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PixelPipe::PPVariants m_ppVariants; |
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enum { N_CACHED_SPANS = 64 }; |
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Span m_spanCache[N_CACHED_SPANS]; |
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int m_nSpans; |
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}; |
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//======================================================================= |
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} //namespace OpenVGRI |
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//======================================================================= |
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#endif /* __RIRASTERIZER_H */ |