435 lines
15 KiB
C++
435 lines
15 KiB
C++
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// FGPanel.cxx - default, 2D single-engine prop instrument panel
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//
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// Written by David Megginson, started January 2000.
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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 as
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// published by the Free Software Foundation; either version 2 of the
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// 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, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// 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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// $Id: FGPanel.cxx,v 1.1 2016/07/20 22:01:30 allaert Exp $
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#include <stdio.h> // sprintf
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#include <string.h>
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#include <simgear/compiler.h>
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#include <simgear/debug/logstream.hxx>
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#include <simgear/misc/sg_path.hxx>
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#if defined (SG_MAC)
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#include <OpenGL/gl.h>
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#include <GLUT/glut.h>
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#elif defined (_GLES2)
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#include <GLES2/gl2.h>
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#else
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#include <GL/glew.h> // Must be included before <GL/gl.h>
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#include <GL/gl.h>
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#include <GL/glut.h>
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#endif
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#include "GL_utils.hxx"
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#include "FGPanel.hxx"
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#include "FGTextLayer.hxx"
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#include "FGTexturedLayer.hxx"
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////////////////////////////////////////////////////////////////////////
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// Local functions.
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////////////////////////////////////////////////////////////////////////
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GLuint FGPanel::Textured_Layer_Program_Object (0);
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GLint FGPanel::Textured_Layer_Position_Loc (0);
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GLint FGPanel::Textured_Layer_Tex_Coord_Loc (0);
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GLint FGPanel::Textured_Layer_MVP_Loc (0);
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GLint FGPanel::Textured_Layer_Sampler_Loc (0);
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////////////////////////////////////////////////////////////////////////
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// Implementation of FGPanel.
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////////////////////////////////////////////////////////////////////////
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/**
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* Constructor.
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*/
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FGPanel::FGPanel (const SGPropertyNode_ptr root) :
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m_flipx (root->getNode ("/sim/panel/flip-x", true)),
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m_bg_width (1.0), m_bg_height (1.0) {
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}
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/**
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* Destructor.
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*/
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FGPanel::~FGPanel () {
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for (instrument_list_type::iterator it = m_instruments.begin ();
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it != m_instruments.end ();
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++it) {
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delete *it;
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*it = 0;
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}
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}
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/**
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* Initialize the panel.
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*/
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void
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FGPanel::init () {
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// Textured Layer Shaders
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const char V_Textured_Layer_Shader_Str[] =
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#ifdef _GLES2
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"attribute vec4 a_position; \n"
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"attribute vec2 a_tex_coord; \n"
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"varying vec2 v_tex_coord; \n"
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#else
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"#version 330 \n"
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"in vec4 a_position; \n"
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"in vec2 a_tex_coord; \n"
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"out vec2 v_tex_coord; \n"
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#endif
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"uniform mat4 u_mvp_matrix; \n"
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"void main () { \n"
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" gl_Position = u_mvp_matrix * a_position; \n"
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" v_tex_coord = a_tex_coord; \n"
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"} \n";
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const char F_Textured_Layer_Shader_Str[] =
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#ifdef _GLES2
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"precision mediump float; \n"
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"varying vec2 v_tex_coord; \n"
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#else
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"#version 330 \n"
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"in vec2 v_tex_coord; \n"
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"out vec4 gl_FragColor; \n"
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#endif
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"uniform sampler2D u_texture; \n"
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"void main () { \n"
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" vec4 base_color = texture2D (u_texture, v_tex_coord); \n"
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" if (base_color.a <= 0.1) { \n"
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" discard; \n"
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" } \n"
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" gl_FragColor = base_color; \n"
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"} \n";
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Textured_Layer_Program_Object = GL_utils::instance ().load_program (V_Textured_Layer_Shader_Str,
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F_Textured_Layer_Shader_Str);
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if (Textured_Layer_Program_Object == 0) {
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terminate ();
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}
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// Get the attribute locations
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Textured_Layer_Position_Loc = glGetAttribLocation (Textured_Layer_Program_Object, "a_position");
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Textured_Layer_Tex_Coord_Loc = glGetAttribLocation (Textured_Layer_Program_Object, "a_tex_coord");
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// Get the uniform locations
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Textured_Layer_MVP_Loc = glGetUniformLocation (Textured_Layer_Program_Object, "u_mvp_matrix");
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// Get the sampler location
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Textured_Layer_Sampler_Loc = glGetUniformLocation (Textured_Layer_Program_Object, "u_texture");
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FGTexturedLayer::Init (Textured_Layer_Program_Object,
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Textured_Layer_Position_Loc,
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Textured_Layer_Tex_Coord_Loc,
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Textured_Layer_MVP_Loc,
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Textured_Layer_Sampler_Loc);
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// Text Layer Shaders
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if (!FGTextLayer::Init ()) {
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terminate ();
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}
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glClearColor (0.0f, 0.0f, 0.0f, 1.0f);
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}
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/**
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* Bind panel properties.
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*/
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void
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FGPanel::bind () {
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}
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/**
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* Unbind panel properties.
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*/
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void
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FGPanel::unbind () {
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}
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void
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FGPanel::update (const double dt) {
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getInitDisplayList ();
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// Draw the instruments.
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// Syd Adams: added instrument clipping
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for (instrument_list_type::const_iterator current = m_instruments.begin ();
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current != m_instruments.end ();
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++current) {
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FGPanelInstrument *instr = *current;
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GL_utils::instance ().glPushMatrix ();
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GL_utils::instance ().glTranslatef (instr->getXPos (), instr->getYPos (), 0);
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instr->draw();
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GL_utils::instance ().glPopMatrix ();
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}
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#ifndef _GLES2
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// restore some original state
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//glPopAttrib ();
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#endif
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}
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/**
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* Add an instrument to the panel.
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*/
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void
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FGPanel::addInstrument (FGPanelInstrument * const instrument) {
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m_instruments.push_back (instrument);
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}
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/**
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* Set the panel's background texture.
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*/
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void
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FGPanel::setBackground (const FGCroppedTexture_ptr texture) {
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m_bg = texture;
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}
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void
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FGPanel::setBackgroundWidth (const double d) {
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m_bg_width = d;
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}
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void
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FGPanel::setBackgroundHeight (const double d) {
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m_bg_height = d;
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}
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/**
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* Set the panel's multiple background textures.
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*/
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void
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FGPanel::setMultiBackground (const FGCroppedTexture_ptr texture, const int idx) {
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m_bg = 0;
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m_mbg[idx] = texture;
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}
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void
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FGPanel::setWidth (const int width) {
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m_width = width;
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}
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int
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FGPanel::getWidth () const {
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return m_width;
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}
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void
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FGPanel::setHeight (const int height) {
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m_height = height;
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}
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int
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FGPanel::getHeight () const {
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return m_height;
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}
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void
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FGPanel::getInitDisplayList () {
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glUseProgram (Textured_Layer_Program_Object);
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GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_PROJECTION);
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GL_utils::instance ().glLoadIdentity ();
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if (m_flipx->getBoolValue ()) {
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GL_utils::instance ().gluOrtho2D (m_width, 0, m_height, 0);
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} else {
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GL_utils::instance ().gluOrtho2D (0, m_width, 0, m_height);
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}
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GL_utils::instance ().glTranslatef (-1.0f, -1.0f, 0.0f);
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GL_utils::instance ().glScalef (2.0f / GLfloat (m_width), 2.0f / GLfloat (m_height), 1.0f);
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#ifndef _GLES2
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glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
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#endif
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GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_MODELVIEW);
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GL_utils::instance ().glLoadIdentity ();
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glClear (GL_COLOR_BUFFER_BIT);
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glUseProgram (Textured_Layer_Program_Object);
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#ifndef _GLES2
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// save some state
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//glPushAttrib (GL_COLOR_BUFFER_BIT | GL_ENABLE_BIT | GL_LIGHTING_BIT |
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// GL_TEXTURE_BIT | GL_PIXEL_MODE_BIT | GL_CULL_FACE |
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// GL_DEPTH_BUFFER_BIT );
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#endif
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// Draw the background
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glEnable (GL_TEXTURE_2D);
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#ifndef _GLES2
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glDisable (GL_LIGHTING);
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#endif
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glEnable (GL_BLEND);
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glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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#ifndef _GLES2
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glEnable (GL_COLOR_MATERIAL);
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#endif
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glEnable (GL_CULL_FACE);
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glCullFace (GL_BACK);
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glDisable (GL_DEPTH_TEST);
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if (m_bg != NULL) {
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m_bg->bind (Textured_Layer_Sampler_Loc);
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const GLfloat v_Vertices[] = {
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0.0f, 0.0f, 0.0f, // Position 0 (bottom left corner)
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0.0f, 0.0f, // TexCoord 0 (bottom left corner)
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float (m_width), 0.0f, 0.0f, // Position 1 (bottom right corner)
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float (m_bg_width), 0.0f, // TexCoord 1 (bottom right corner)
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float (m_width), float (m_height), 0.0f, // Position 2 (top right corner)
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float (m_bg_width), float (m_bg_height), // TexCoord 2 (top right corner)
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0.0f, float (m_height), 0.0f, // Position 3 (top left corner)
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0.0f, float (m_bg_height) }; // TexCoord 3 (top left corner)
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glVertexAttribPointer (Textured_Layer_Position_Loc,
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3,
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GL_FLOAT,
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GL_FALSE,
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5 * sizeof (GLfloat),
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v_Vertices);
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glVertexAttribPointer (Textured_Layer_Tex_Coord_Loc,
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2,
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GL_FLOAT,
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GL_FALSE,
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5 * sizeof (GLfloat),
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&v_Vertices[3]);
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glEnableVertexAttribArray (Textured_Layer_Position_Loc);
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glEnableVertexAttribArray (Textured_Layer_Tex_Coord_Loc);
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GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_PROJECTION);
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GL_utils::instance ().glPushMatrix ();
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GL_utils::instance ().glMultMatrixf
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(*reinterpret_cast <GLfloat (*)[4][4]>
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(GL_utils::instance ().get_top_matrix (GL_utils::GL_UTILS_MODELVIEW)));
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glUniformMatrix4fv (Textured_Layer_MVP_Loc,
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1,
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GL_FALSE,
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GL_utils::instance ().get_top_matrix (GL_utils::GL_UTILS_PROJECTION));
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const GLushort indices[] = {0, 1, 2, 0, 2, 3};
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glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
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GL_utils::instance ().glPopMatrix ();
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GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_MODELVIEW);
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} else if (m_mbg[0] != NULL) {
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for (int i = 0; i < 4; ++i) {
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// top row of textures...(1,3,5,7)
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m_mbg[i*2]->bind (Textured_Layer_Sampler_Loc);
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const GLfloat v_Vertices_Top[] = {
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float (i * m_width / 4), float (m_height / 2), 0.0f, // Position 0 (bottom left corner)
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0.0f, 0.0f, // TexCoord 0 (bottom left corner)
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float ((i + 1) * m_width / 4), float (m_height / 2), 0.0f, // Position 1 (bottom right corner)
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1.0f, 0.0f, // TexCoord 1 (bottom right corner)
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float ((i + 1) * m_width / 4), float (m_height), 0.0f, // Position 2 (top right corner)
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1.0f, 1.0f, // TexCoord 2 (top right corner)
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float (i * m_width / 4), float (m_height), 0.0f, // Position 3 (top left corner)
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0.0f, 1.0f }; // TexCoord 3 (top left corner)
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glVertexAttribPointer (Textured_Layer_Position_Loc,
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3,
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GL_FLOAT,
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GL_FALSE,
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5 * sizeof (GLfloat),
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v_Vertices_Top);
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glVertexAttribPointer (Textured_Layer_Tex_Coord_Loc,
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2,
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GL_FLOAT,
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GL_FALSE,
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5 * sizeof (GLfloat),
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&v_Vertices_Top[3]);
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glEnableVertexAttribArray (Textured_Layer_Position_Loc);
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glEnableVertexAttribArray (Textured_Layer_Tex_Coord_Loc);
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GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_PROJECTION);
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|
|
GL_utils::instance ().glPushMatrix ();
|
||
|
|
GL_utils::instance ().glMultMatrixf
|
||
|
|
(*reinterpret_cast <GLfloat (*)[4][4]>
|
||
|
|
(GL_utils::instance ().get_top_matrix (GL_utils::GL_UTILS_MODELVIEW)));
|
||
|
|
glUniformMatrix4fv (Textured_Layer_MVP_Loc,
|
||
|
|
1,
|
||
|
|
GL_FALSE,
|
||
|
|
GL_utils::instance ().get_top_matrix (GL_utils::GL_UTILS_PROJECTION));
|
||
|
|
|
||
|
|
const GLushort indices[] = {0, 1, 2, 0, 2, 3};
|
||
|
|
glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
|
||
|
|
|
||
|
|
GL_utils::instance ().glPopMatrix ();
|
||
|
|
GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_MODELVIEW);
|
||
|
|
|
||
|
|
// bottom row of textures...(2,4,6,8)
|
||
|
|
m_mbg[i*2+1]->bind (Textured_Layer_Sampler_Loc);
|
||
|
|
const GLfloat v_Vertices_Bot[] = {
|
||
|
|
float (i * m_width / 4), 0.0f, 0.0f, // Position 0 (bottom left corner)
|
||
|
|
0.0f, 0.0f, // TexCoord 0 (bottom left corner)
|
||
|
|
float ((i + 1) * m_width / 4), 0.0f, 0.0f, // Position 1 (bottom right corner)
|
||
|
|
1.0f, 0.0f, // TexCoord 1 (bottom right corner)
|
||
|
|
float ((i + 1) * m_width / 4), float (m_height / 2), 0.0f, // Position 2 (top right corner)
|
||
|
|
1.0f, 1.0f, // TexCoord 2 (top right corner)
|
||
|
|
float (i * m_width / 4), float (m_height / 2), 0.0f, // Position 3 (top left corner)
|
||
|
|
0.0f, 1.0f }; // TexCoord 3 (top left corner)
|
||
|
|
glVertexAttribPointer (Textured_Layer_Position_Loc,
|
||
|
|
3,
|
||
|
|
GL_FLOAT,
|
||
|
|
GL_FALSE,
|
||
|
|
5 * sizeof (GLfloat),
|
||
|
|
v_Vertices_Bot);
|
||
|
|
glVertexAttribPointer (Textured_Layer_Tex_Coord_Loc,
|
||
|
|
2,
|
||
|
|
GL_FLOAT,
|
||
|
|
GL_FALSE,
|
||
|
|
5 * sizeof (GLfloat),
|
||
|
|
&v_Vertices_Bot[3]);
|
||
|
|
|
||
|
|
glEnableVertexAttribArray (Textured_Layer_Position_Loc);
|
||
|
|
glEnableVertexAttribArray (Textured_Layer_Tex_Coord_Loc);
|
||
|
|
|
||
|
|
GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_PROJECTION);
|
||
|
|
GL_utils::instance ().glPushMatrix ();
|
||
|
|
GL_utils::instance ().glMultMatrixf
|
||
|
|
(*reinterpret_cast <GLfloat (*)[4][4]>
|
||
|
|
(GL_utils::instance ().get_top_matrix (GL_utils::GL_UTILS_MODELVIEW)));
|
||
|
|
glUniformMatrix4fv (Textured_Layer_MVP_Loc,
|
||
|
|
1,
|
||
|
|
GL_FALSE,
|
||
|
|
GL_utils::instance ().get_top_matrix (GL_utils::GL_UTILS_PROJECTION));
|
||
|
|
|
||
|
|
glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
|
||
|
|
|
||
|
|
GL_utils::instance ().glPopMatrix ();
|
||
|
|
GL_utils::instance ().glMatrixMode (GL_utils::GL_UTILS_MODELVIEW);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
#ifndef _GLES2
|
||
|
|
glUseProgram (0);
|
||
|
|
float c[4];
|
||
|
|
glGetFloatv (GL_CURRENT_COLOR, c);
|
||
|
|
glColor4f (1.0, 0.0, 0.0, 1.0);
|
||
|
|
glBegin (GL_QUADS);
|
||
|
|
glVertex2f (0, 0);
|
||
|
|
glVertex2f (m_width, 0);
|
||
|
|
glVertex2f (m_width, m_height);
|
||
|
|
glVertex2f (0, m_height);
|
||
|
|
glEnd ();
|
||
|
|
glColor4fv (c);
|
||
|
|
glUseProgram (Textured_Layer_Program_Object);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|