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render-sdf.cpp
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render-sdf.cpp
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#include "render-sdf.h"
#include "arithmetics.hpp"
#include "pixel-conversion.hpp"
#include "bitmap-interpolation.hpp"
namespace msdfgen {
static float distVal(float dist, double pxRange, float midValue) {
if (!pxRange)
return (float) (dist > midValue);
return (float) clamp((dist-midValue)*pxRange+.5);
}
void renderSDF(const BitmapRef<float, 1> &output, const BitmapConstRef<float, 1> &sdf, double pxRange, float midValue) {
Vector2 scale((double) sdf.width/output.width, (double) sdf.height/output.height);
pxRange *= (double) (output.width+output.height)/(sdf.width+sdf.height);
for (int y = 0; y < output.height; ++y)
for (int x = 0; x < output.width; ++x) {
float sd;
interpolate(&sd, sdf, scale*Point2(x+.5, y+.5));
*output(x, y) = distVal(sd, pxRange, midValue);
}
}
void renderSDF(const BitmapRef<float, 3> &output, const BitmapConstRef<float, 1> &sdf, double pxRange, float midValue) {
Vector2 scale((double) sdf.width/output.width, (double) sdf.height/output.height);
pxRange *= (double) (output.width+output.height)/(sdf.width+sdf.height);
for (int y = 0; y < output.height; ++y)
for (int x = 0; x < output.width; ++x) {
float sd;
interpolate(&sd, sdf, scale*Point2(x+.5, y+.5));
float v = distVal(sd, pxRange, midValue);
output(x, y)[0] = v;
output(x, y)[1] = v;
output(x, y)[2] = v;
}
}
void renderSDF(const BitmapRef<float, 1> &output, const BitmapConstRef<float, 3> &sdf, double pxRange, float midValue) {
Vector2 scale((double) sdf.width/output.width, (double) sdf.height/output.height);
pxRange *= (double) (output.width+output.height)/(sdf.width+sdf.height);
for (int y = 0; y < output.height; ++y)
for (int x = 0; x < output.width; ++x) {
float sd[3];
interpolate(sd, sdf, scale*Point2(x+.5, y+.5));
*output(x, y) = distVal(median(sd[0], sd[1], sd[2]), pxRange, midValue);
}
}
void renderSDF(const BitmapRef<float, 3> &output, const BitmapConstRef<float, 3> &sdf, double pxRange, float midValue) {
Vector2 scale((double) sdf.width/output.width, (double) sdf.height/output.height);
pxRange *= (double) (output.width+output.height)/(sdf.width+sdf.height);
for (int y = 0; y < output.height; ++y)
for (int x = 0; x < output.width; ++x) {
float sd[3];
interpolate(sd, sdf, scale*Point2(x+.5, y+.5));
output(x, y)[0] = distVal(sd[0], pxRange, midValue);
output(x, y)[1] = distVal(sd[1], pxRange, midValue);
output(x, y)[2] = distVal(sd[2], pxRange, midValue);
}
}
void renderSDF(const BitmapRef<float, 1> &output, const BitmapConstRef<float, 4> &sdf, double pxRange, float midValue) {
Vector2 scale((double) sdf.width/output.width, (double) sdf.height/output.height);
pxRange *= (double) (output.width+output.height)/(sdf.width+sdf.height);
for (int y = 0; y < output.height; ++y)
for (int x = 0; x < output.width; ++x) {
float sd[4];
interpolate(sd, sdf, scale*Point2(x+.5, y+.5));
*output(x, y) = distVal(median(sd[0], sd[1], sd[2]), pxRange, midValue);
}
}
void renderSDF(const BitmapRef<float, 4> &output, const BitmapConstRef<float, 4> &sdf, double pxRange, float midValue) {
Vector2 scale((double) sdf.width/output.width, (double) sdf.height/output.height);
pxRange *= (double) (output.width+output.height)/(sdf.width+sdf.height);
for (int y = 0; y < output.height; ++y)
for (int x = 0; x < output.width; ++x) {
float sd[4];
interpolate(sd, sdf, scale*Point2(x+.5, y+.5));
output(x, y)[0] = distVal(sd[0], pxRange, midValue);
output(x, y)[1] = distVal(sd[1], pxRange, midValue);
output(x, y)[2] = distVal(sd[2], pxRange, midValue);
output(x, y)[3] = distVal(sd[3], pxRange, midValue);
}
}
void simulate8bit(const BitmapRef<float, 1> &bitmap) {
const float *end = bitmap.pixels+1*bitmap.width*bitmap.height;
for (float *p = bitmap.pixels; p < end; ++p)
*p = pixelByteToFloat(pixelFloatToByte(*p));
}
void simulate8bit(const BitmapRef<float, 3> &bitmap) {
const float *end = bitmap.pixels+3*bitmap.width*bitmap.height;
for (float *p = bitmap.pixels; p < end; ++p)
*p = pixelByteToFloat(pixelFloatToByte(*p));
}
void simulate8bit(const BitmapRef<float, 4> &bitmap) {
const float *end = bitmap.pixels+4*bitmap.width*bitmap.height;
for (float *p = bitmap.pixels; p < end; ++p)
*p = pixelByteToFloat(pixelFloatToByte(*p));
}
}