1 files changed, 108 insertions, 0 deletions
diff --git a/thirdparty/msdfgen/core/render-sdf.cpp b/thirdparty/msdfgen/core/render-sdf.cpp
new file mode 100644
index 0000000000..e282285e59
--- /dev/null
+++ b/thirdparty/msdfgen/core/render-sdf.cpp
@@ -0,0 +1,108 @@
+
+#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));
+}
+
+}