reorganized file layout (part 2: edits)

[org.ibex.core.git] / src / org / ibex / graphics / Paint.java

diff --git a/src/org/ibex/graphics/Paint.java b/src/org/ibex/graphics/Paint.java
new file mode 100644 (file)
index 0000000..46c43ee
--- /dev/null
+++ b/src/org/ibex/graphics/Paint.java
@@ -0,0 +1,102 @@
+// FIXME
+// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
+package org.ibex.graphics;
+import java.util.*;
+
+public abstract class Paint {
+    public abstract void fillTrapezoid(int tx1, int tx2, int ty1, int tx3, int tx4, int ty2, PixelBuffer buf);
+
+    public static class SingleColorPaint extends Paint {
+        int color;
+        public SingleColorPaint(int color) { this.color = color; }
+        public void fillTrapezoid(int x1, int x2, int y1, int x3, int x4, int y2, PixelBuffer buf) {
+            buf.fillTrapezoid(x1, x2, y1, x3, x4, y2, color);
+        }
+    }
+
+
+    /*
+      public static abstract class GradientPaint extends Paint {
+      public GradientPaint(boolean reflect, boolean repeat, Affine gradientTransform,
+      int[] stop_colors, float[] stop_offsets) {
+      this.reflect = reflect; this.repeat = repeat;
+      this.gradientTransform = gradientTransform;
+      this.stop_colors = stop_colors;
+      this.stop_offsets = stop_offsets;
+      }
+      Affine gradientTransform = Affine.identity();
+      boolean useBoundingBox = false;            // FIXME not supported
+      boolean patternUseBoundingBox = false;     // FIXME not supported
+
+      // it's invalid for both of these to be true
+      boolean reflect = false;                   // FIXME not supported
+      boolean repeat = false;                    // FIXME not supported
+      int[] stop_colors;
+      float[] stop_offsets;
+
+      public void fillTrapezoid(float tx1, float tx2, float ty1, float tx3, float tx4, float ty2, PixelBuffer buf) {
+      Affine a = buf.a;
+      Affine inverse = a.copy().invert();
+      float slope1 = (tx3 - tx1) / (ty2 - ty1);
+      float slope2 = (tx4 - tx2) / (ty2 - ty1);
+      for(float y=ty1; y<ty2; y++) {
+      float _x1 = (y - ty1) * slope1 + tx1;
+      float _x2 = (y - ty1) * slope2 + tx2;
+      if (_x1 > _x2) { float _x0 = _x1; _x1 = _x2; _x2 = _x0; }
+
+      for(float x=_x1; x<_x2; x++) {
+                   
+      float distance = isLinear ?
+      // length of projection of <x,y> onto the gradient vector == {<x,y> \dot {grad \over |grad|}}
+      (x * (x2 - x1) + y * (y2 - y1)) / (float)Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1)) :
+                       
+      // radial form is simple! FIXME, not quite right
+      (float)Math.sqrt((x - cx) * (x - cx) + (y - cy) * (y - cy));
+                       
+      // FIXME: offsets are 0..1, not 0..length(gradient)
+      int i = 0; for(; i<stop_offsets.length; i++) if (distance < stop_offsets[i]) break;
+
+      // FIXME: handle points beyond the bounds
+      if (i < 0 || i >= stop_offsets.length) continue;
+
+      // gradate from offsets[i - 1] to offsets[i]
+      float percentage = ((distance - stop_offsets[i - 1]) / (stop_offsets[i] - stop_offsets[i - 1]));
+
+      int a = (int)((((stop_colors[i] >> 24) & 0xff) - ((stop_colors[i - 1] >> 24) & 0xff)) * percentage) +
+      ((stop_colors[i - 1] >> 24) & 0xff);
+      int r = (int)((((stop_colors[i] >> 16) & 0xff) - ((stop_colors[i - 1] >> 16) & 0xff)) * percentage) +
+      ((stop_colors[i - 1] >> 16) & 0xff);
+      int g = (int)((((stop_colors[i] >> 8) & 0xff)  - ((stop_colors[i - 1] >> 8) & 0xff)) * percentage) +
+      ((stop_colors[i - 1] >> 8) & 0xff);
+      int b = (int)((((stop_colors[i] >> 0) & 0xff)  - ((stop_colors[i - 1] >> 0) & 0xff)) * percentage) +
+      ((stop_colors[i - 1] >> 0) & 0xff);
+      int argb = (a << 24) | (r << 16) | (g << 8) | b;
+      buf.drawPoint((int)x, (int)Math.floor(y), argb);
+      }
+      }
+      }
+      }
+
+      public static class LinearGradientPaint extends GradientPaint {
+      public LinearGradientPaint(float x1, float y1, float x2, float y2, boolean reflect, boolean repeat,
+      Affine gradientTransform,  int[] stop_colors, float[] stop_offsets) {
+      super(reflect, repeat, gradientTransform, stop_colors, stop_offsets);
+      this.x1 = x1; this.x2 = x2; this.y1 = y1; this.y2 = y2;
+      }
+      float x1 = 0, y1 = 0, x2 = 300, y2 = 300;
+      }
+
+      public static class RadialGradientPaint extends GradientPaint {
+      public RadialGradientPaint(float cx, float cy, float fx, float fy, float r, boolean reflect, boolean repeat,
+      Affine gradientTransform, int[] stop_colors, float[] stop_offsets) {
+      super(reflect, repeat, gradientTransform, stop_colors, stop_offsets);
+      this.cx = cx; this.cy = cy; this.fx = fx; this.fy = fy; this.r = r;
+      }
+            
+      float cx, cy, r, fx, fy;
+
+      }
+    */
+
+
+}