054a2bd920
As in ztriangle, vertex color must be shifted from internal 16-bits fixed-point format to 8-bits colors. To do so, define values similar to the ones describing for ST fixed-point format. Also, use these in tglClear instead of hard-coded multiplicands, as is done in tglColor4f and gl_transform_to_viewport. Also, make tglClear take into account requested clear depth.
52 lines
2 KiB
C++
52 lines
2 KiB
C++
/* ResidualVM - A 3D game interpreter
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*
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* ResidualVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the AUTHORS
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* This file is based on, or a modified version of code from TinyGL (C) 1997-1998 Fabrice Bellard,
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* which is licensed under the zlib-license (see LICENSE).
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* It also has modifications by the ResidualVM-team, which are covered under the GPLv2 (or later).
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*/
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#include "graphics/tinygl/zgl.h"
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#include "graphics/tinygl/zdirtyrect.h"
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namespace TinyGL {
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void glopClearColor(GLContext *c, GLParam *p) {
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c->clear_color = Vector4(p[1].f, p[2].f, p[3].f, p[4].f);
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}
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void glopClearDepth(GLContext *c, GLParam *p) {
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c->clear_depth = p[1].f;
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}
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void glopClear(GLContext *c, GLParam *p) {
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int mask = p[1].i;
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int z = (int)(c->clear_depth * ((2 << ZB_Z_BITS) - 1));
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int r = (int)(c->clear_color.X * (ZB_POINT_RED_MAX - ZB_POINT_RED_MIN) + ZB_POINT_RED_MIN);
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int g = (int)(c->clear_color.Y * (ZB_POINT_GREEN_MAX - ZB_POINT_GREEN_MIN) + ZB_POINT_GREEN_MIN);
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int b = (int)(c->clear_color.Z * (ZB_POINT_BLUE_MAX - ZB_POINT_BLUE_MIN) + ZB_POINT_BLUE_MIN);
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tglIssueDrawCall(new Graphics::ClearBufferDrawCall(mask & TGL_DEPTH_BUFFER_BIT, z, mask & TGL_COLOR_BUFFER_BIT, r, g, b));
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}
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} // end of namespace TinyGL
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