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graphics/tinygl/clear.cpp

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+/* 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/>.
+ *
+ */
+
+/*
+ * This file is based on, or a modified version of code from TinyGL (C) 1997-2022 Fabrice Bellard,
+ * which is licensed under the MIT license (see LICENSE).
+ * It also has modifications by the ResidualVM-team, which are covered under the GPLv2 (or later).
+ */
+
+#include "graphics/tinygl/zgl.h"
+#include "graphics/tinygl/zdirtyrect.h"
+
+namespace TinyGL {
+
+void GLContext::glopClearColor(GLParam *p) {
+	clear_color = Vector4(p[1].f, p[2].f, p[3].f, p[4].f);
+}
+
+void GLContext::glopClearDepth(GLParam *p) {
+	clear_depth = p[1].f;
+}
+
+void GLContext::glopClearStencil(GLParam *p) {
+	clear_stencil = p[1].i & 0xFF;
+}
+
+void GLContext::glopClear(GLParam *p) {
+	int mask = p[1].i;
+	int z = (int)(clear_depth * ((1 << ZB_Z_BITS) - 1));
+	int r = (int)(clear_color.X * 255);
+	int g = (int)(clear_color.Y * 255);
+	int b = (int)(clear_color.Z * 255);
+	int s = (int)(clear_stencil);
+
+	issueDrawCall(new ClearBufferDrawCall(mask & TGL_DEPTH_BUFFER_BIT, z,
+	                                      mask & TGL_COLOR_BUFFER_BIT, r, g, b,
+	                                      mask & TGL_STENCIL_BUFFER_BIT, s));
+}
+
+} // end of namespace TinyGL