diff options
Diffstat (limited to 'platform/java/com/artifex/mupdf/fitz/Matrix.java')
| -rw-r--r-- | platform/java/com/artifex/mupdf/fitz/Matrix.java | 158 |
1 files changed, 131 insertions, 27 deletions
diff --git a/platform/java/com/artifex/mupdf/fitz/Matrix.java b/platform/java/com/artifex/mupdf/fitz/Matrix.java index ede57ccc..80da84fc 100644 --- a/platform/java/com/artifex/mupdf/fitz/Matrix.java +++ b/platform/java/com/artifex/mupdf/fitz/Matrix.java @@ -2,15 +2,9 @@ package com.artifex.mupdf.fitz; public class Matrix { - public float a; - public float b; - public float c; - public float d; - public float e; - public float f; - - public Matrix(float a, float b, float c, float d, float e, float f) - { + public float a, b, c, d, e, f; + + public Matrix(float a, float b, float c, float d, float e, float f) { this.a = a; this.b = b; this.c = c; @@ -19,28 +13,32 @@ public class Matrix this.f = f; } - public Matrix(float a, float d) - { - this.a = a; - this.b = 0; - this.c = 0; - this.d = d; - this.e = 0; - this.f = 0; + public Matrix(float a, float b, float c, float d) { + this(a, b, c, d, 0, 0); } - public Matrix(float a) - { - this.a = a; - this.b = 0; - this.c = 0; - this.d = a; - this.e = 0; - this.f = 0; + public Matrix(float a, float d) { + this(a, 0, 0, d, 0, 0); + } + + public Matrix(float a) { + this(a, 0, 0, a, 0, 0); + } + + public Matrix() { + this(1, 0, 0, 1, 0, 0); + } + + public Matrix(Matrix one, Matrix two) { + a = one.a * two.a + one.b * two.c; + b = one.a * two.b + one.b * two.d; + c = one.c * two.a + one.d * two.c; + d = one.c * two.b + one.d * two.d; + e = one.e * two.a + one.f * two.c + two.e; + f = one.e * two.b + one.f * two.d + two.f; } - public Matrix concat(Matrix m) - { + public Matrix concat(Matrix m) { float a = this.a * m.a + this.b * m.c; float b = this.a * m.b + this.b * m.d; float c = this.c * m.a + this.d * m.c; @@ -56,4 +54,110 @@ public class Matrix return this; } + + public Matrix scale(float sx, float sy) { + a *= sx; + b *= sx; + c *= sy; + d *= sy; + return this; + } + + public Matrix scale(float s) { + return scale(s, s); + } + + public Matrix translate(float tx, float ty) { + e += tx * a + ty * c; + f += tx * b + ty * d; + return this; + } + + public Matrix rotate(float degrees) { + while (degrees < 0) + degrees += 360; + while (degrees >= 360) + degrees -= 360; + + if (Math.abs(0 - degrees) < 0.0001) { + // Nothing to do + } else if (Math.abs(90 - degrees) < 0.0001) { + float save_a = a; + float save_b = b; + a = c; + b = d; + c = -save_a; + d = -save_b; + } else if (Math.abs(180 - degrees) < 0.0001) { + a = -a; + b = -b; + c = -c; + d = -d; + } else if (Math.abs(270 - degrees) < 0.0001) { + float save_a = a; + float save_b = b; + a = -c; + b = -d; + c = save_a; + d = save_b; + } else { + float sin = (float)Math.sin(degrees * Math.PI / 180.0); + float cos = (float)Math.cos(degrees * Math.PI / 180.0); + float save_a = a; + float save_b = b; + a = cos * save_a + sin * c; + b = cos * save_b + sin * d; + c = -sin * save_a + cos * c; + d = -sin * save_b + cos * d; + } + return this; + } + + public String toString() { + return "[" + a + " " + b + " " + c + " " + d + " " + e + " " + f + "]"; + } + + public static Matrix Identity() { + return new Matrix(1, 0, 0, 1, 0, 0); + } + + public static Matrix Scale(float x) { + return new Matrix(x, 0, 0, x, 0, 0); + } + + public static Matrix Scale(float x, float y) { + return new Matrix(x, 0, 0, y, 0, 0); + } + + public static Matrix Translate(float x, float y) { + return new Matrix(1, 0, 0, 1, x, y); + } + + public static Matrix Rotate(float degrees) { + float sin, cos; + + while (degrees < 0) + degrees += 360; + while (degrees >= 360) + degrees -= 360; + + if (Math.abs(0 - degrees) < 0.0001) { + sin = 0; + cos = 1; + } else if (Math.abs(90 - degrees) < 0.0001) { + sin = 1; + cos = 0; + } else if (Math.abs(180 - degrees) < 0.0001) { + sin = 0; + cos = -1; + } else if (Math.abs(270 - degrees) < 0.0001) { + sin = -1; + cos = 0; + } else { + sin = (float)Math.sin(degrees * Math.PI / 180.0); + cos = (float)Math.cos(degrees * Math.PI / 180.0); + } + + return new Matrix(cos, sin, -sin, cos, 0, 0); + } } |