added 3dengfx into the repo, probably not the correct version for this

[summerhack] / src / 3dengfx / src / gfx / color.inl

diff --git a/src/3dengfx/src/gfx/color.inl b/src/3dengfx/src/gfx/color.inl
new file mode 100644 (file)
index 0000000..7d82b95
--- /dev/null
+++ b/src/3dengfx/src/gfx/color.inl
@@ -0,0 +1,86 @@
+/*
+Copyright 2004 John Tsiombikas <nuclear@siggraph.org>
+
+This file is part of the graphics core library.
+
+The graphics core library is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+The graphics core library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the graphics core library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/* colors
+ * author: John Tsiombikas 2004
+ */
+
+inline Color int_color(int r, int g, int b, int a) {
+       return Color((scalar_t)r / 255.0, (scalar_t)g / 255.0, (scalar_t)b / 255.0, (scalar_t)a / 255.0);
+}
+
+inline unsigned long pack_color32(const Color &col) {
+       unsigned long r = (unsigned long)(col.r * 255.0);
+       unsigned long g = (unsigned long)(col.g * 255.0);
+       unsigned long b = (unsigned long)(col.b * 255.0);
+       unsigned long a = (unsigned long)(col.a * 255.0);
+       return (a << ALPHA_SHIFT32) | (r << RED_SHIFT32) | (g << GREEN_SHIFT32) | (b << BLUE_SHIFT32);
+}
+
+inline unsigned short pack_color16(const Color &col) {
+       unsigned long r = (unsigned long)(col.r * 31.0);
+       unsigned long g = (unsigned long)(col.g * 63.0);
+       unsigned long b = (unsigned long)(col.b * 31.0);
+       return (r << RED_SHIFT16) | (g << GREEN_SHIFT16) | (b << BLUE_SHIFT16);
+}
+
+inline unsigned short pack_color15(const Color &col) {
+       unsigned long r = (unsigned long)(col.r * 31.0);
+       unsigned long g = (unsigned long)(col.g * 31.0);
+       unsigned long b = (unsigned long)(col.b * 31.0);
+       return (r << RED_SHIFT15) | (g << GREEN_SHIFT15) | (b << BLUE_SHIFT15);
+}
+
+inline Color unpack_color32(unsigned long pcol) {
+       scalar_t a = (scalar_t)((pcol >> ALPHA_SHIFT32) & ALPHA_MASK32) / 255.0;
+       scalar_t r = (scalar_t)((pcol >> RED_SHIFT32) & RED_MASK32) / 255.0;
+       scalar_t g = (scalar_t)((pcol >> GREEN_SHIFT32) & GREEN_MASK32) / 255.0;
+       scalar_t b = (scalar_t)((pcol >> BLUE_SHIFT32) & BLUE_MASK32) / 255.0;
+       return Color(r, g, b, a);
+}
+
+inline Color unpack_color16(unsigned short pcol) {
+       scalar_t r = (scalar_t)((pcol >> RED_SHIFT16) & RED_MASK16) / 31.0;
+       scalar_t g = (scalar_t)((pcol >> GREEN_SHIFT16) & GREEN_MASK16) / 63.0;
+       scalar_t b = (scalar_t)((pcol >> BLUE_SHIFT16) & BLUE_MASK16) / 31.0;
+       return Color(r, g, b, 1.0);
+}
+
+inline Color unpack_color15(unsigned short pcol) {
+       scalar_t r = (scalar_t)((pcol >> RED_SHIFT15) & RED_MASK15) / 31.0;
+       scalar_t g = (scalar_t)((pcol >> GREEN_SHIFT15) & GREEN_MASK15) / 31.0;
+       scalar_t b = (scalar_t)((pcol >> BLUE_SHIFT15) & BLUE_MASK15) / 31.0;
+       return Color(r, g, b, 1.0);
+}
+
+inline Color lookup_color8(int index, const unsigned char **pal) {
+       scalar_t r = (scalar_t)pal[index][0] / 255.0;
+       scalar_t g = (scalar_t)pal[index][1] / 255.0;
+       scalar_t b = (scalar_t)pal[index][2] / 255.0;
+       return Color(r, g, b, 1.0);
+}
+
+inline Color blend_colors(const Color &c1, const Color &c2, scalar_t t) {
+       scalar_t r = c1.r + (c2.r - c1.r) * t;
+       scalar_t g = c1.g + (c2.g - c1.g) * t;
+       scalar_t b = c1.b + (c2.b - c1.b) * t;
+       scalar_t a = c1.a + (c2.a - c1.a) * t;
+       return Color(r, g, b, a);
+}