texture.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef ULTIMA8_GFX_TEXTURE_H
#define ULTIMA8_GFX_TEXTURE_H

namespace Ultima {
namespace Ultima8 {

//
// Texturing Helper Macros
//

// 32 Bit Texture bit operations
#define TEX32_A_SHIFT           24
#define TEX32_A_MASK            0xFF000000
#define TEX32_A(col32)          (((col32)&TEX32_A_MASK)>>TEX32_A_SHIFT)

#define TEX32_G_SHIFT           8
#define TEX32_G_MASK            0x0000FF00
#define TEX32_G(col32)          (((col32)&TEX32_G_MASK)>>TEX32_G_SHIFT)

#define TEX32_B_SHIFT           16
#define TEX32_B_MASK            0x00FF0000
#define TEX32_B(col32)          (((col32)&TEX32_B_MASK)>>TEX32_B_SHIFT)

#define TEX32_R_SHIFT           0
#define TEX32_R_MASK            0x000000FF
#define TEX32_R(col32)          (((col32)&TEX32_R_MASK)>>TEX32_R_SHIFT)

#define TEX32_PACK_RGB(r, g, b) (uint32)(((0xFF) << TEX32_A_SHIFT) | ((r) << TEX32_R_SHIFT) | \
                                 ((g) << TEX32_G_SHIFT) | ((b) << TEX32_B_SHIFT))

#define TEX32_PACK_RGBA(r, g, b, a) (uint32)(((a) << TEX32_A_SHIFT) | ((r) << TEX32_R_SHIFT) | \
                                    ((g) << TEX32_G_SHIFT) | ((b) << TEX32_B_SHIFT))

} // End of namespace Ultima8
} // End of namespace Ultima

#endif