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clear.cpp

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00001 /* ResidualVM - A 3D game interpreter
00002  *
00003  * ResidualVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the AUTHORS
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 /*
00024  * This file is based on, or a modified version of code from TinyGL (C) 1997-1998 Fabrice Bellard,
00025  * which is licensed under the zlib-license (see LICENSE).
00026  * It also has modifications by the ResidualVM-team, which are covered under the GPLv2 (or later).
00027  */
00028 
00029 #include "graphics/tinygl/zgl.h"
00030 #include "graphics/tinygl/zdirtyrect.h"
00031 
00032 namespace TinyGL {
00033 
00034 void glopClearColor(GLContext *c, GLParam *p) {
00035     c->clear_color = Vector4(p[1].f, p[2].f, p[3].f, p[4].f);
00036 }
00037 
00038 void glopClearDepth(GLContext *c, GLParam *p) {
00039     c->clear_depth = p[1].f;
00040 }
00041 
00042 void glopClear(GLContext *c, GLParam *p) {
00043     int mask = p[1].i;
00044     int z = (int)(c->clear_depth * ((1 << ZB_Z_BITS) - 1));
00045     int r = (int)(c->clear_color.X * 255);
00046     int g = (int)(c->clear_color.Y * 255);
00047     int b = (int)(c->clear_color.Z * 255);
00048 
00049     tglIssueDrawCall(new Graphics::ClearBufferDrawCall(mask & TGL_DEPTH_BUFFER_BIT, z, mask & TGL_COLOR_BUFFER_BIT, r, g, b));
00050 }
00051 
00052 } // end of namespace TinyGL


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