1 files changed, 246 insertions, 0 deletions

diff --git a/libraries/evas/src/lib/engines/common/evas_convert_color.c b/libraries/evas/src/lib/engines/common/evas_convert_color.c
new file mode 100644
index 0000000..70a9e90
--- /dev/null
+++ b/libraries/evas/src/lib/engines/common/evas_convert_color.c
@@ -0,0 +1,246 @@
+#include "evas_common.h"
+#include "evas_convert_color.h"
+
+
+EAPI DATA32
+evas_common_convert_argb_premul(DATA32 *data, unsigned int len)
+{
+   DATA32 *de = data + len;
+   DATA32 nas = 0;
+
+   while (data < de)
+     {
+        DATA32  a = 1 + (*data >> 24);
+
+        *data = (*data & 0xff000000) +
+          (((((*data) >> 8) & 0xff) * a) & 0xff00) +
+          (((((*data) & 0x00ff00ff) * a) >> 8) & 0x00ff00ff);
+        data++;
+
+        if ((a == 1) || (a == 256))
+          nas++;
+     }
+
+   return nas;
+}
+
+EAPI void
+evas_common_convert_argb_unpremul(DATA32 *data, unsigned int len)
+{
+   DATA32  *de = data + len;
+
+   while (data < de)
+     {
+        DATA32  a = (*data >> 24);
+
+        if ((a > 0) && (a < 255))
+           *data = ARGB_JOIN(a,
+                             (R_VAL(data) * 255) / a,
+                             (G_VAL(data) * 255) / a,
+                             (B_VAL(data) * 255) / a);
+        data++;
+     }
+
+}
+
+EAPI void
+evas_common_convert_color_argb_premul(int a, int *r, int *g, int *b)
+{
+   a++;
+   if (r) { *r = (a * *r) >> 8; }
+   if (g) { *g = (a * *g) >> 8; }
+   if (b) { *b = (a * *b) >> 8; }
+}
+
+EAPI void
+evas_common_convert_color_argb_unpremul(int a, int *r, int *g, int *b)
+{
+   if (!a) return;
+   if (r) { *r = (255 * *r) / a; }
+   if (g) { *g = (255 * *g) / a; }
+   if (b) { *b = (255 * *b) / a; }
+}
+
+EAPI void
+evas_common_convert_color_hsv_to_rgb(float h, float s, float v, int *r, int *g, int *b)
+{
+   int i;
+   float f;
+
+   v *= 255;
+   if (s == 0)
+     {
+       if (r) *r = v;
+       if (g) *g = v;
+       if (b) *b = v;
+       return;
+     }
+
+   h /= 60;
+   i = h;
+   f = h - i;
+
+   s *= v;
+   f *= s;
+   s = v - s;
+
+   switch (i)
+     {
+       case 1:
+         if (r) *r = v - f;  if (g) *g = v;  if (b) *b = s;
+         return;
+       case 2:
+         if (r) *r = s;  if (g) *g = v;  if (b) *b = s + f;
+         return;
+       case 3:
+         if (r) *r = s;  if (g) *g = v - f;  if (b) *b = v;
+         return;
+       case 4:
+         if (r) *r = s + f;  if (g) *g = s;  if (b) *b = v;
+         return;
+       case 5:
+         if (r) *r = v;  if (g) *g = s;  if (b) *b = v - f;
+         return;
+       default:
+         if (r) *r = v;  if (g) *g = s + f;  if (b) *b = s;
+         break;
+     }
+}
+
+EAPI void
+evas_common_convert_color_rgb_to_hsv(int r, int g, int b, float *h, float *s, float *v)
+{
+   int max, min, d = r - g;
+
+   //set min to MIN(g,r)
+   d = (d & (~(d >> 8)));
+   min = r - d;
+   //set max to MAX(g,r)
+   max = g + d;
+
+   //set min to MIN(b,min)
+   d = min - b;
+   min -= (d & (~(d >> 8)));
+
+   //set max to MAX(max,b)
+   d = b - max;
+   max += (d & (~(d >> 8)));
+
+   d = max - min;
+
+   if (v) *v = (max / 255.0);
+   if (!max || !d)
+     {
+        if (s) *s = 0;
+        if (h) *h = 0;
+        return;
+     }
+
+   if (s) *s = (d / (float)max);
+   if (r == max)
+     {
+       if (h)
+         {
+           *h = 60 * ((g - b) / (float)d);
+           if (*h < 0) *h += 360;
+         }
+       return;
+     }
+   if (g == max)
+     {
+       if (h)
+         {
+           *h = 120 + (60 * ((b - r) / (float)d));
+           if (*h < 0) *h += 360;
+         }
+       return;
+     }
+   if (h)
+     {
+       *h = 240 + (60 * ((r - g) / (float)d));
+       if (*h < 0) *h += 360;
+     }
+}
+
+EAPI void
+evas_common_convert_color_hsv_to_rgb_int(int h, int s, int v, int *r, int *g, int *b)
+{
+   int   i, f;
+
+   if (!s)
+     {
+        *r = *g = *b = v;
+        return;
+     }
+
+   i = h / 255;
+   f = h - (i * 255);
+   s = (v * s) / 255;
+   f = (s * f) / 255;
+   s = v - s;
+
+   switch (i)
+     {
+        case 1:
+          *r = v - f; *g = v; *b = s;
+          return;
+        case 2:
+          *r = s; *g = v; *b = s + f;
+          return;
+        case 3:
+          *r = s; *g = v - f; *b = v;
+          return;
+        case 4:
+          *r = s + f; *g = s; *b = v;
+          return;
+        case 5:
+          *r = v; *g = s; *b = v - f;
+          return;
+        default:
+          *r = v; *g = s + f; *b = s;
+         break;
+     }
+}
+
+EAPI void
+evas_common_convert_color_rgb_to_hsv_int(int r, int g, int b, int *h, int *s, int *v)
+{
+   int  min, max, d = r - g;
+
+   d = (d & (~(d >> 8)));
+   min = r - d;
+   max = g + d;
+
+   d = min - b;
+   min -= (d & (~(d >> 8)));
+
+   d = b - max;
+   max += (d & (~(d >> 8)));
+
+   d = max - min;
+
+   *v = max;
+   if (!max)
+     {
+        *s = *h = 0;
+        return;
+     }
+
+   *s = ((d * 255) / max);
+
+   if (r == max)
+     {
+        *h = (((g - b) * 255) / d);
+        if (*h < 0) *h += 1530;
+        return;
+     }
+   if (g == max)
+     {
+        *h = 510 + (((b - r) * 255) / d);
+        if (*h < 0) *h += 1530;
+        return;
+     }
+   *h = 1020 + (((r - g) * 255) / d);
+   if (*h < 0) *h += 1530;
+
+}