Add m-esr52 at 52.6.0

1 files changed, 259 insertions, 0 deletions

diff --git a/layout/base/nsCSSColorUtils.cpp b/layout/base/nsCSSColorUtils.cpp
new file mode 100644
index 000000000..806b7c3cb
--- /dev/null
+++ b/layout/base/nsCSSColorUtils.cpp
@@ -0,0 +1,259 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* functions that manipulate colors */
+
+#include "nsCSSColorUtils.h"
+#include "nsDebug.h"
+#include <math.h>
+
+// Weird color computing code stolen from winfe which was stolen
+// from the xfe which was written originally by Eric Bina. So there.
+
+#define RED_LUMINOSITY        299
+#define GREEN_LUMINOSITY      587
+#define BLUE_LUMINOSITY       114
+#define INTENSITY_FACTOR      25
+#define LUMINOSITY_FACTOR     75
+
+#define MAX_COLOR             255
+#define COLOR_DARK_THRESHOLD  51
+#define COLOR_LIGHT_THRESHOLD 204
+
+#define COLOR_LITE_BS_FACTOR 45
+#define COLOR_LITE_TS_FACTOR 70
+
+#define COLOR_DARK_BS_FACTOR 30
+#define COLOR_DARK_TS_FACTOR 50
+
+#define LIGHT_GRAY NS_RGB(192, 192, 192)
+#define DARK_GRAY  NS_RGB(96, 96, 96)
+
+#define MAX_BRIGHTNESS  254
+#define MAX_DARKNESS     0
+
+void NS_GetSpecial3DColors(nscolor aResult[2],
+                           nscolor aBackgroundColor,
+                           nscolor aBorderColor)
+{
+
+  uint8_t f0, f1;
+  uint8_t r, g, b;
+
+  uint8_t rb = NS_GET_R(aBorderColor);
+  uint8_t gb = NS_GET_G(aBorderColor);
+  uint8_t bb = NS_GET_B(aBorderColor);
+
+  uint8_t a = NS_GET_A(aBorderColor);
+
+  // This needs to be optimized.
+  // Calculating background brightness again and again is 
+  // a waste of time!!!. Just calculate it only once.
+  // .....somehow!!!
+
+  uint8_t red = NS_GET_R(aBackgroundColor);
+  uint8_t green = NS_GET_G(aBackgroundColor);
+  uint8_t blue = NS_GET_B(aBackgroundColor);
+  
+  uint8_t elementBrightness = NS_GetBrightness(rb,gb,bb);
+  uint8_t backgroundBrightness = NS_GetBrightness(red, green, blue);
+
+
+  if (backgroundBrightness < COLOR_DARK_THRESHOLD) {
+    f0 = COLOR_DARK_BS_FACTOR;
+    f1 = COLOR_DARK_TS_FACTOR;
+	if(elementBrightness == MAX_DARKNESS)
+	{
+       rb = NS_GET_R(DARK_GRAY);
+       gb = NS_GET_G(DARK_GRAY);
+       bb = NS_GET_B(DARK_GRAY);
+	}
+  }else if (backgroundBrightness > COLOR_LIGHT_THRESHOLD) {
+    f0 = COLOR_LITE_BS_FACTOR;
+    f1 = COLOR_LITE_TS_FACTOR;
+	if(elementBrightness == MAX_BRIGHTNESS)
+	{
+       rb = NS_GET_R(LIGHT_GRAY);
+       gb = NS_GET_G(LIGHT_GRAY);
+       bb = NS_GET_B(LIGHT_GRAY);
+	}
+  }else {
+    f0 = COLOR_DARK_BS_FACTOR +
+      (backgroundBrightness *
+       (COLOR_LITE_BS_FACTOR - COLOR_DARK_BS_FACTOR) / MAX_COLOR);
+    f1 = COLOR_DARK_TS_FACTOR +
+      (backgroundBrightness *
+       (COLOR_LITE_TS_FACTOR - COLOR_DARK_TS_FACTOR) / MAX_COLOR);
+  }
+  
+  
+  r = rb - (f0 * rb / 100);
+  g = gb - (f0 * gb / 100);
+  b = bb - (f0 * bb / 100);
+  aResult[0] = NS_RGBA(r, g, b, a);
+
+  r = rb + (f1 * (MAX_COLOR - rb) / 100);
+  g = gb + (f1 * (MAX_COLOR - gb) / 100);
+  b = bb + (f1 * (MAX_COLOR - bb) / 100);
+  aResult[1] = NS_RGBA(r, g, b, a);
+}
+
+int NS_GetBrightness(uint8_t aRed, uint8_t aGreen, uint8_t aBlue)
+{
+
+  uint8_t intensity = (aRed + aGreen + aBlue) / 3;
+
+  uint8_t luminosity = NS_GetLuminosity(NS_RGB(aRed, aGreen, aBlue)) / 1000;
+ 
+  return ((intensity * INTENSITY_FACTOR) +
+          (luminosity * LUMINOSITY_FACTOR)) / 100;
+}
+
+int32_t NS_GetLuminosity(nscolor aColor)
+{
+  // When aColor is not opaque, the perceived luminosity will depend
+  // on what color(s) aColor is ultimately drawn on top of, which we
+  // do not know.
+  NS_ASSERTION(NS_GET_A(aColor) == 255,
+               "impossible to compute luminosity of a non-opaque color");
+  
+  return (NS_GET_R(aColor) * RED_LUMINOSITY +
+          NS_GET_G(aColor) * GREEN_LUMINOSITY +
+          NS_GET_B(aColor) * BLUE_LUMINOSITY);
+}
+
+// Function to convert RGB color space into the HSV colorspace
+// Hue is the primary color defined from 0 to 359 degrees
+// Saturation is defined from 0 to 255.  The higher the number.. the deeper
+// the color Value is the brightness of the color. 0 is black, 255 is white.
+void NS_RGB2HSV(nscolor aColor, uint16_t &aHue, uint16_t &aSat,
+                uint16_t &aValue, uint8_t &aAlpha)
+{
+  uint8_t r, g, b;
+  int16_t delta, min, max, r1, b1, g1;
+  float   hue;
+
+  r = NS_GET_R(aColor);
+  g = NS_GET_G(aColor);
+  b = NS_GET_B(aColor);
+
+  if (r>g) {
+    max = r;
+    min = g;
+  } else {
+    max = g;
+    min = r;
+  }
+
+  if (b>max) {
+    max = b;
+  }
+  if (b<min) {
+    min = b;
+  }
+
+  // value or brightness will always be the max of all the colors(RGB)
+  aValue = max;   
+  delta = max-min;
+  aSat = (max!=0)?((delta*255)/max):0;
+  r1 = r;
+  b1 = b;
+  g1 = g;
+
+  if (aSat==0) {
+    hue = 1000;
+  } else {
+    if(r==max){
+      hue=(float)(g1-b1)/(float)delta;
+    } else if (g1==max) {
+      hue= 2.0f+(float)(b1-r1)/(float)delta;
+    } else { 
+      hue = 4.0f+(float)(r1-g1)/(float)delta;
+    }
+  }
+
+  if(hue<999) {
+    hue*=60;
+    if(hue<0){
+      hue+=360;
+    }
+  } else {
+    hue=0;
+  }
+
+  aHue = (uint16_t)hue;
+
+  aAlpha = NS_GET_A(aColor);
+}
+
+// Function to convert HSV color space into the RGB colorspace
+// Hue is the primary color defined from 0 to 359 degrees
+// Saturation is defined from 0 to 255.  The higher the number.. the deeper
+// the color Value is the brightness of the color. 0 is black, 255 is white.
+void NS_HSV2RGB(nscolor &aColor, uint16_t aHue, uint16_t aSat, uint16_t aValue,
+                uint8_t aAlpha)
+{
+  uint16_t  r = 0, g = 0, b = 0;
+  uint16_t  i, p, q, t;
+  double    h, f, percent;
+
+  if ( aSat == 0 ){
+    // achromatic color, no hue is defined
+    r = aValue;
+    g = aValue;
+    b = aValue;
+  } else {
+    // hue in in degrees around the color wheel defined from
+    // 0 to 360 degrees.  
+    if (aHue >= 360) {
+      aHue = 0;
+    }
+
+    // we break the color wheel into 6 areas.. these
+    // areas define how the saturation and value define the color.
+    // reds behave differently than the blues
+    h = (double)aHue / 60.0;
+    i = (uint16_t) floor(h);
+    f = h-(double)i;
+    percent = ((double)aValue/255.0);   // this needs to be a value from 0 to 1, so a percentage
+                                        // can be calculated of the saturation.
+    p = (uint16_t)(percent*(255-aSat));
+    q = (uint16_t)(percent*(255-(aSat*f)));
+    t = (uint16_t)(percent*(255-(aSat*(1.0-f))));
+
+    // i is guaranteed to never be larger than 5.
+    switch(i){
+      case 0: r = aValue; g = t; b = p;break;
+      case 1: r = q; g = aValue; b = p;break;
+      case 2: r = p; g = aValue; b = t;break;
+      case 3: r = p; g = q; b = aValue;break;
+      case 4: r = t; g = p; b = aValue;break;
+      case 5: r = aValue; g = p; b = q;break;
+    }
+  }
+  aColor = NS_RGBA(r, g, b, aAlpha);
+}
+
+#undef RED_LUMINOSITY
+#undef GREEN_LUMINOSITY
+#undef BLUE_LUMINOSITY
+#undef INTENSITY_FACTOR
+#undef LUMINOSITY_FACTOR
+
+#undef MAX_COLOR
+#undef COLOR_DARK_THRESHOLD
+#undef COLOR_LIGHT_THRESHOLD
+
+#undef COLOR_LITE_BS_FACTOR
+#undef COLOR_LITE_TS_FACTOR
+
+#undef COLOR_DARK_BS_FACTOR
+#undef COLOR_DARK_TS_FACTOR
+
+#undef LIGHT_GRAY
+#undef DARK_GRAY
+
+#undef MAX_BRIGHTNESS
+#undef MAX_DARKNESS