103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant 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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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma once
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#include "rect_t.h"
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#include "igl.h"
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class XORRectangle {
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void draw( const rect_t& rect, const GLenum mode ) const{
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glBegin( mode );
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glVertex2f( rect.min[0], rect.max[1] );
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glVertex2f( rect.max[0], rect.max[1] );
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glVertex2f( rect.max[0], rect.min[1] );
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glVertex2f( rect.min[0], rect.min[1] );
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glEnd();
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}
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public:
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XORRectangle() {
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}
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~XORRectangle() {
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}
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void set( rect_t rect, int width, int height ) {
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if( rect.max[0] - rect.min[0] != 0.f && rect.max[1] - rect.min[1] != 0.f ) {
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GlobalOpenGL_debugAssertNoErrors();
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glViewport( 0, 0, width, height );
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// set up viewpoint
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glMatrixMode( GL_PROJECTION );
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glLoadIdentity();
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glOrtho( -1, 1, -1, 1, -100, 100 );
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glMatrixMode( GL_MODELVIEW );
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glLoadIdentity();
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glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
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glDisable( GL_DEPTH_TEST );
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glDisable( GL_TEXTURE_2D );
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if( GlobalOpenGL().GL_1_3() ) {
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glDisable( GL_MULTISAMPLE );
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}
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glEnable( GL_BLEND );
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/* additive to handle dark background */
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glBlendFunc( GL_ONE, GL_ONE );
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const float r = 10.f;
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switch ( rect.modifier )
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{
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case rect_t::eSelect: glColor3f( 1.f / r, .5f / r, 0.f ); break;
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case rect_t::eDeselect: glColor3f( 0.f, 0.f, 1.f / r ); break;
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case rect_t::eToggle: glColor3f( 1.f / r, 1.f / r, 1.f / r ); break;
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}
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draw( rect, GL_QUADS );
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/* filter to handle bright background */
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glBlendFunc( GL_ZERO, GL_SRC_COLOR );
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switch ( rect.modifier )
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{
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case rect_t::eSelect: glColor3f( 1.f, .9f, 0.7f ); break;
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case rect_t::eDeselect: glColor3f( 0.8f, 0.8f, 1.f ); break;
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case rect_t::eToggle: glColor3f( .8f, .8f, .8f ); break;
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}
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draw( rect, GL_QUADS );
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/* alpha blend on top */
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glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
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const float a = .3f;
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switch ( rect.modifier )
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{
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case rect_t::eSelect: glColor4f( 1.f, .5f, 0.f, a ); break;
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case rect_t::eDeselect: glColor4f( 0.f, 0.f, 1.f, a ); break;
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case rect_t::eToggle: glColor4f( 1.f, 1.f, 1.f, a ); break;
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}
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draw( rect, GL_QUADS );
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glDisable( GL_BLEND );
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glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
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glLineWidth( 1 );
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glColor3f( 1.f, .5f, 0.f );
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draw( rect, GL_LINE_LOOP );
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GlobalOpenGL_debugAssertNoErrors();
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}
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}
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};
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