/* EXTRAITS DE LA LICENCE
Copyright CEA, contributeurs : Luc BILLARD et Damien
CALISTE, laboratoire L_Sim, (2001-2005)
Adresse mèl :
BILLARD, non joignable par mèl ;
CALISTE, damien P caliste AT cea P fr.
Ce logiciel est un programme informatique servant à visualiser des
structures atomiques dans un rendu pseudo-3D.
Ce logiciel est régi par la licence CeCILL soumise au droit français et
respectant les principes de diffusion des logiciels libres. Vous pouvez
utiliser, modifier et/ou redistribuer ce programme sous les conditions
de la licence CeCILL telle que diffusée par le CEA, le CNRS et l'INRIA
sur le site "http://www.cecill.info".
Le fait que vous puissiez accéder à cet en-tête signifie que vous avez
pris connaissance de la licence CeCILL, et que vous en avez accepté les
termes (cf. le fichier Documentation/licence.fr.txt fourni avec ce logiciel).
*/
/* LICENCE SUM UP
Copyright CEA, contributors : Luc BILLARD et Damien
CALISTE, laboratoire L_Sim, (2001-2005)
E-mail address:
BILLARD, not reachable any more ;
CALISTE, damien P caliste AT cea P fr.
This software is a computer program whose purpose is to visualize atomic
configurations in 3D.
This software is governed by the CeCILL license under French law and
abiding by the rules of distribution of free software. You can use,
modify and/ or redistribute the software under the terms of the CeCILL
license as circulated by CEA, CNRS and INRIA at the following URL
"http://www.cecill.info".
The fact that you are presently reading this means that you have had
knowledge of the CeCILL license and that you accept its terms. You can
find a copy of this licence shipped with this software at Documentation/licence.en.txt.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "opengl.h"
#include "visu_extension.h"
#include "visu_tools.h"
#include "visu_object.h"
#include "visu_configFile.h"
#include "openGLFunctions/renderingMode.h"
#include "openGLFunctions/interactive.h"
#include "openGLFunctions/view.h"
#include "openGLFunctions/objectList.h"
#include "renderingBackend/visu_windowInterface.h"
/******************************************************************************/
/* static int stereo; */
#define FLAG_PARAMETER_OPENGL_IMMEDIATE "opengl_immediateDrawing"
#define DESC_PARAMETER_OPENGL_IMMEDIATE "If true, changes of parameters means immediate redrawing ; boolean 0 or 1"
#define PARAMETER_OPENGL_IMMEDIATE_DEFAULT 1
int opengl_immediate;
gboolean readOpenGLImmediate(gchar **lines, int nbLines,
int position, GString *errorMessage);
#define FLAG_PARAMETER_OPENGL_ANTIALIAS "opengl_antialias"
#define DESC_PARAMETER_OPENGL_ANTIALIAS "If true, lines are drawn smoother ; boolean 0 or 1"
#define PARAMETER_OPENGL_ANTIALIAS_DEFAULT 0
int antialias;
gboolean readOpenGLAntialias(gchar **lines, int nbLines,
int position, GString *errorMessage);
#define FLAG_PARAMETER_OPENGL_FAKEBS "opengl_fakeBackingStore"
#define DESC_PARAMETER_OPENGL_FAKEBS "If true, V_Sim catches the Expose event from the X server and calls a redraw ; boolean 0 or 1"
#define PARAMETER_OPENGL_FAKEBS_DEFAULT 0
int fakeBackingStore;
/* Local methods. */
gboolean exportParametersOpenGL(GString *data, int *nbLinesWritten,
VisuData *dataObj);
void glSetAntiAlias();
/* Private - This initialise the opengl redering (light...) */
void gl_new_data(GenericRenderingWindow window, VisuData *data);
/******************************************************************************/
int initOpengl()
{
VisuConfigFileEntry *resourceEntry;
DBG_fprintf(stderr, "OpenGl : initialization.\n");
obj = gluNewQuadric();
/* glViewport(0, 0, width, height); */
/* Deals with lights. */
currentLights = lightEnvironnement_new();
lightEnvironnementAdd_light(currentLights, light_newDefault());
/* Parameters */
resourceEntry = visuConfigFileAdd_entry(VISU_CONFIGFILE_PARAMETER,
FLAG_PARAMETER_OPENGL_ANTIALIAS,
DESC_PARAMETER_OPENGL_ANTIALIAS,
1, readOpenGLAntialias);
resourceEntry = visuConfigFileAdd_entry(VISU_CONFIGFILE_PARAMETER,
FLAG_PARAMETER_OPENGL_IMMEDIATE,
DESC_PARAMETER_OPENGL_IMMEDIATE,
1, readOpenGLImmediate);
visuConfigFileAdd_exportFunction(VISU_CONFIGFILE_PARAMETER,
exportParametersOpenGL);
/* Initialise others sub-modules dealing with OpenGL. */
openGLObjectList_init();
openGLInit_renderingMode();
OpenGLViewInit();
openGLInteractive_init();
antialias = PARAMETER_OPENGL_ANTIALIAS_DEFAULT;
fakeBackingStore = PARAMETER_OPENGL_FAKEBS_DEFAULT;
opengl_immediate = PARAMETER_OPENGL_IMMEDIATE_DEFAULT;
return 1;
}
/******************************************************************************/
void setOpenGlMaterial(float* material, float* rgba)
{
float mm[4] = {0.0f, 0.0f, 0.0f, 0.0f};
mm[3] = rgba[3];
mm[0] = material[material_amb] * rgba[0];
mm[1] = material[material_amb] * rgba[1];
mm[2] = material[material_amb] * rgba[2];
glMaterialfv(GL_FRONT, GL_AMBIENT, mm);
mm[0] = material[material_dif] * rgba[0];
mm[1] = material[material_dif] * rgba[1];
mm[2] = material[material_dif] * rgba[2];
glMaterialfv(GL_FRONT, GL_DIFFUSE, mm);
glMaterialf(GL_FRONT, GL_SHININESS, material[material_shi] * 128.0f);
mm[0] = material[material_spe];
mm[1] = material[material_spe];
mm[2] = material[material_spe];
glMaterialfv(GL_FRONT, GL_SPECULAR, mm);
mm[0] = material[material_emi] * rgba[0];
mm[1] = material[material_emi] * rgba[1];
mm[2] = material[material_emi] * rgba[2];
glMaterialfv(GL_FRONT, GL_EMISSION, mm);
}
void openGLInit_context()
{
/* Set the openGL flags. */
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glDepthRange(0.0, 1.0);
glClearDepth(1.0);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glEnable(GL_NORMALIZE);
lightEnvironnementApply(currentLights);
openGLApply_renderingMode(openGLGet_globalRenderingOption());
glSetAntiAlias();
/* OpenGLViewSet_windowSize(view, wi, he); */
}
/******************************************************************************/
void openGL_reDraw(guint width, guint height, gpointer data)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
callAllExtensionsLists();
}
void openGL_drawToEmpty(guint width, guint height, gpointer data)
{
gpointer image;
int widthImg, heightImg;
guchar *imageData;
gboolean alpha;
int x, y;
float rgb[3];
int viewport[4];
glPushAttrib(GL_ENABLE_BIT);
visuRenderingWindowGet_backgroundColor(visuRenderingWindowGet_current(), rgb);
DBG_fprintf(stderr, "Opengl : set background color to (%f,%f,%f).\n",
rgb[0], rgb[1], rgb[2]);
glClearColor(rgb[0], rgb[1], rgb[2], 0.25f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
image = visuRenderingWindowGet_backgroundImage(visuRenderingWindowGet_current(),
&imageData, &alpha, &widthImg, &heightImg);
if (image)
{
glDisable(GL_FOG);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
/* We can use fixed value for widthImg and heightImg since we project then
in a 2D ortho with these values. */
glGetIntegerv(GL_VIEWPORT, viewport);
x = (viewport[2] - widthImg) / 2;
y = (viewport[3] + heightImg) / 2;
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluOrtho2D(0.0, (float)viewport[2], 0., (float)viewport[3]);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glRasterPos2i(x, y);
glPixelZoom(1., -1.);
if (alpha)
glDrawPixels(widthImg, heightImg, GL_RGBA, GL_UNSIGNED_BYTE, imageData);
else
glDrawPixels(widthImg, heightImg, GL_RGB, GL_UNSIGNED_BYTE, imageData);
glPixelZoom(1., 1.);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
}
glPopAttrib();
}
/******************************************************************************/
/* To set the antialiasing on lines. */
void glSetAntiAlias()
{
if (antialias)
{
/* Set blend if not present */
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
/* Antialias */
glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
}
else
{
glDisable(GL_LINE_SMOOTH);
/* glDisable(GL_BLEND); */
}
}
int setAntialias(int value)
{
if (value == antialias)
return 0;
antialias = value;
glSetAntiAlias();
return 1;
}
/* Get the value of the antialiasing parameter. */
int getAntialias()
{
return antialias;
}
/* If true all changes are applied only when the refresh button
is pushed. */
void setImmediateDrawing(int bool)
{
if (bool == opengl_immediate)
return;
opengl_immediate = bool;
}
int getImmediateDrawing()
{
return opengl_immediate;
}
/***************************/
/* Dealing with parameters */
/***************************/
gboolean readOpenGLAntialias(gchar **lines, int nbLines,
int position, GString *errorMessage)
{
int res;
int val;
res = sscanf(lines[0],"%d", &val);
if (res != 1)
{
if (errorMessage)
g_string_append_printf(errorMessage, _("WARNING! Parse error at line %d,"
" 1 integer value (v > 0) must appear"
" after the %s markup.\n"),
position, FLAG_PARAMETER_OPENGL_ANTIALIAS);
setAntialias(PARAMETER_OPENGL_ANTIALIAS_DEFAULT);
return FALSE;
}
else
setAntialias(val);
return TRUE;
}
gboolean readOpenGLImmediate(gchar **lines, int nbLines,
int position, GString *errorMessage)
{
int res;
int val;
res = sscanf(lines[0],"%d", &val);
if (res != 1)
{
if (errorMessage)
g_string_append_printf(errorMessage, _("WARNING! Parse error at line %d, 1 integer"
" value (v > 0) must appear"
" after the %s markup.\n"),
position, FLAG_PARAMETER_OPENGL_IMMEDIATE);
setAntialias(PARAMETER_OPENGL_IMMEDIATE_DEFAULT);
return FALSE;
}
else
setImmediateDrawing(val);
return TRUE;
}
gboolean exportParametersOpenGL(GString *data, int *nbLinesWritten,
VisuData *dataObj)
{
g_string_append_printf(data, "# %s\n", DESC_PARAMETER_OPENGL_ANTIALIAS);
g_string_append_printf(data, "%s: %d\n\n", FLAG_PARAMETER_OPENGL_ANTIALIAS,
antialias);
g_string_append_printf(data, "# %s\n", DESC_PARAMETER_OPENGL_IMMEDIATE);
g_string_append_printf(data, "%s: %d\n\n", FLAG_PARAMETER_OPENGL_IMMEDIATE,
opengl_immediate);
*nbLinesWritten = 6;
return TRUE;
}
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