81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
#pragma once
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#ifndef WARP_H
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#define WARP_H
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#include "tfxparam.h"
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#include "trop.h"
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#include "trasterfx.h"
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//-----------------------------------------------------------------------
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struct WarpParams {
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int m_shrink;
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double m_warperScale;
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double m_intensity;
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bool m_sharpen;
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};
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struct LPoint {
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TPointD s; // Warped lattice point
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TPointD d; // Original lattice point
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};
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struct Lattice {
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int m_width; // Number of lattice columns
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int m_height; // Number of lattice rows
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LPoint *coords; // Grid vertex coordinates
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Lattice() : coords(0) {}
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~Lattice() {
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if (coords) delete[] coords;
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}
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};
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namespace // Ugly...
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{
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inline int myCeil(double x) {
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return ((x - (int)(x)) > TConsts::epsilon ? (int)(x) + 1 : (int)(x));
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}
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inline TRect convert(const TRectD &r, TPointD &dp) {
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TRect ri(tfloor(r.x0), tfloor(r.y0), myCeil(r.x1), myCeil(r.y1));
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dp.x = r.x0 - ri.x0;
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dp.y = r.y0 - ri.y0;
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assert(dp.x >= 0 && dp.y >= 0);
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return ri;
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}
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}
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//---------------------------------------------------------------------------
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inline double getWarpRadius(const WarpParams ¶ms) {
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return 2.55 * 1.5 * 1.5 * fabs(params.m_intensity);
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}
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//---------------------------------------------------------------------------
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inline double getWarperEnlargement(const WarpParams ¶ms) {
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// It accounts for:
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// * Resample factor (1 - due to triangle filtering)
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// * Eventual grid smoothening (6 - as the blur radius applied after
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// resampling)
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// * grid interpolation (2 - for the shepard interpolant radius)
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int enlargement = 3;
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if (!params.m_sharpen) enlargement += 6;
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return enlargement;
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}
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//---------------------------------------------------------------------------
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void getWarpComputeRects(TRectD &outputComputeRect, TRectD &warpedComputeRect,
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const TRectD &warpedBox, const TRectD &requestedRect,
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const WarpParams ¶ms);
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//---------------------------------------------------------------------------
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//! Deals with raster tiles and invokes warper functions
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void warp(TRasterP &tileRas, const TRasterP &rasIn, TRasterP &warper,
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TPointD rasInPos, TPointD warperPos, const WarpParams ¶ms);
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#endif
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