src/util/draw/gl.c: add utils to generate drawing areas
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Gem-graph client *
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* Widgets - graphic stack management *
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* *
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* Copyright © 2024 Libre en Communs <contact@a-lec.org> *
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* Copyright © 2023-2024 Adrien Bourmault <neox@a-lec.org> *
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* *
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* This file is part of Gem-graph. *
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* *
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* This program is free software: you can redistribute it and/or modify it *
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* under the terms of the GNU Affero General Public License *
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* as published by the Free Software Foundation, *
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* either version 3 of the License, *
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* 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; *
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* without even the implied warranty of MERCHANTABILITY *
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* or FITNESS FOR A PARTICULAR PURPOSE. *
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* See the GNU Affero General Public License for more details. *
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* *
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* You should have received a copy of the GNU Affero General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include "../../../include/graphics.h"
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#include "../../../include/signal.h"
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#define GL_AREA_1000 1000
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struct stack_index_t {
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long stack_id;
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void *container_widget;
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void *gl_area;
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};
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static struct stack_index_t *stack_index = NULL;
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size_t stack_index_size = 0;
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int util_gl_set_arrow (int stack_id, // 2024-06-27 DEBUG !
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int arrows_nb,
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int space_X,
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int space_Y,
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int space_Z,
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int requested_weight,
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int site,
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int arrow_x,
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int arrow_y,
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int arrow_z) {
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printf("util_gl_area.c > int util_gl_set_arrow (...) 2024-06-27 DEBUG\n");
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return 0;
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} // 2024-06-27 DEBUG !
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/*
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* Look for stack entry and returns stack_id
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*
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* @params container_widget, generally the GtkBox that contains the GLArea
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*
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* @returns stack_id
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*/
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long util_gl_get_stack(void *container_widget)
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{
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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if (stack_index[i].container_widget == (void *)container_widget) {
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return stack_index[i].stack_id;
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}
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}
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return -1;
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}
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/*
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* Look for stack entry and returns stack_id
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*
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* @params container_widget, generally the GtkBox that contains the GLArea
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*
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* @returns stack_id
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*/
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long util_gl_is_util_ready(void *container_widget)
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{
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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if (stack_index[i].container_widget == (void *)container_widget) {
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return stack_index[i].stack_id;
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}
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}
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return -1;
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}
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/*
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* Look for stack entry and initializes OpenGL for it
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*
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* @params container_widget, generally the GtkBox that contains the GLArea
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*
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* @returns bool, true if success
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*/
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bool util_gl_init_stack(void *container_widget, GError *error_buffer)
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{
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g_printerr("[debug] util_gl_init_util_gl_stack()\n");
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g_printerr("[debug] util_gl_init_util_gl_stack() : target is %p\n", container_widget);
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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g_printerr("[debug] util_gl_init_util_gl_stack() : i is %d\n", i);
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g_printerr("[debug] util_gl_init_util_gl_stack() : target would be %p\n",
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stack_index[i].container_widget);
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if (stack_index[i].container_widget == (void *)container_widget) {
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stack_index[i].stack_id = graphics_init(&error_buffer);
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g_printerr("[debug] util_gl_init_util_gl_stack() : stack_id is %ld\n",
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stack_index[i].stack_id);
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if (stack_index[i].stack_id >= 0)
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return true;
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else
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return false;
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}
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}
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return false;
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}
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/*
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* Look for stack entry and shutdowns OpenGL for it
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*
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* @params container_widget, generally the GtkBox that contains the GLArea
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*
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* @returns bool, true if success
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*/
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bool util_gl_shutdown_stack(void *container_widget, GError *error_buffer)
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{
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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if (stack_index[i].container_widget == (void *)container_widget) {
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if (graphics_shutdown(stack_index[i].stack_id,
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&error_buffer) == false) {
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return false;
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}
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stack_index[i].stack_id = 0;
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return true;
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}
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}
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return false;
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}
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void util_gl_clean_stack_index(void)
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{
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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stack_index[i].stack_id = 0;
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}
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return;
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}
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/*
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* Look for stack entry and triggers OpenGL for drawing
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*
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* @params container_widget, generally the GtkBox that contains the GLArea
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*
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* @returns bool, true if success
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*/
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bool util_gl_render_stack(GtkWidget *container_widget)
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{
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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if (stack_index[i].container_widget == (void *)container_widget) {
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graphics_draw (stack_index[i].stack_id);
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return true;
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}
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}
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return false;
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}
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//void graphics_draw(const int stack_id) {printf("util_gl_area.c > void graphics_draw(const int stack_id) (161)\n");}
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/*
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* Look for stack entry and triggers OpenGL for drawing
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*
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* @params container_widget, generally the GtkBox that contains the GLArea
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*
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* @returns bool, true if success
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*/
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bool util_gl_update_axis(GtkWidget *container_widget, int axis, int value)
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{
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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if (stack_index[i].container_widget == (void *)container_widget) {
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graphics_stack[stack_index[i].stack_id].rotation_angles[axis] = value;
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gtk_widget_queue_draw((GtkWidget*)(stack_index[i].gl_area));
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return true;
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}
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}
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return false;
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}
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/*
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* Look for every stack entry and shutdowns OpenGL for it
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*
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* @params void
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*
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* @returns bool, true if success
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*/
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void util_gl_shutdown_all_stacks(void)
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{
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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graphics_shutdown(stack_index[i].stack_id, NULL);
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}
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return;
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}
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/*
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* Creates a slider widget
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*
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* @params axis, meaning which axis we're building (for label)
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*
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* @returns GtkWidget*, pointer to the new widget
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*/
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GtkWidget *create_axis_slider(int axis)
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{
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GtkWidget *box, *label, *slider;
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GtkAdjustment *adj;
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const char *text;
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box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
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switch (axis) {
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case X_AXIS:
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text = "X";
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break;
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case Y_AXIS:
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text = "Y";
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break;
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case Z_AXIS:
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text = "Z";
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break;
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default:
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g_assert_not_reached();
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}
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label = gtk_label_new(text);
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gtk_box_append(GTK_BOX(box), label);
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gtk_widget_set_visible (label, TRUE);
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adj = gtk_adjustment_new(0.0, 0.0, 360.0, 1.0, 12.0, 0.0);
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g_signal_connect (adj, "value-changed", G_CALLBACK(on_axis_value_change), (gpointer) label);
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slider = gtk_scale_new(GTK_ORIENTATION_HORIZONTAL, adj);
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gtk_box_append(GTK_BOX(box), slider);
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gtk_widget_set_hexpand(slider, TRUE);
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gtk_widget_set_visible (slider, TRUE);
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gtk_widget_set_visible (box, TRUE);
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return box;
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}
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/*
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* Creates GLArea and indexes it
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*
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* @params target_mode, meaning which util_gl_stack we're on
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* target_widget, meaning the box that will host the GLArea
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*
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* @returns bool, true if success
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*/
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bool util_gl_setup_glarea(int target_mode, GtkWidget *target_widget)
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{
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GtkWidget *gl_area;
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g_printerr("[debug] util_gl_setup_glarea()\n");
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assert(target_widget);
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g_printerr("[debug] util_gl_setup_glarea() : target is %p\n", target_widget);
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if (stack_index == NULL) {
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stack_index = g_malloc(sizeof(struct stack_index_t));
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stack_index_size = 1;
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} else {
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// look for stack_index entry
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for (int i = 0; i < stack_index_size; i++) {
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if (stack_index[i].container_widget == (void *)target_widget) {
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return false;
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}
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}
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// create entry
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stack_index =
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g_realloc(stack_index,
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++stack_index_size * sizeof(struct stack_index_t));
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}
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gl_area = GTK_WIDGET(gtk_gl_area_new());
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assert(gl_area);
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gtk_widget_set_size_request(gl_area, GL_AREA_1000, GL_AREA_1000);
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gtk_gl_area_set_auto_render(GTK_GL_AREA(gl_area), true);
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gtk_widget_set_hexpand(gl_area, TRUE);
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gtk_widget_set_vexpand(gl_area, TRUE);
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gtk_widget_set_halign(gl_area, GTK_ALIGN_CENTER);
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gtk_widget_set_valign(gl_area, GTK_ALIGN_CENTER);
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// The main "draw" call for GtkGLArea
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g_signal_connect(GTK_GL_AREA(gl_area), "render", G_CALLBACK(on_glarea_render), NULL);
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g_signal_connect(gl_area, "realize", G_CALLBACK(on_glarea_realize), NULL);
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g_signal_connect(gl_area, "unrealize", G_CALLBACK(on_glarea_unrealize), NULL);
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stack_index[stack_index_size-1].container_widget =
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(void*)target_widget;
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stack_index[stack_index_size-1].gl_area = (void*)gl_area;
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g_printerr("[debug] util_gl_setup_glarea() : set target to %p\n", target_widget);
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g_printerr("[debug] util_gl_setup_glarea() : stack_index (@0x%p) had %ld elements\n",
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stack_index,
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stack_index_size);
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gtk_box_append (GTK_BOX (target_widget), gl_area);
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gtk_widget_set_visible (GTK_WIDGET (gl_area), TRUE);
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// Create sliders
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for(int i = 0; i < N_AXIS; i++)
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gtk_box_append(GTK_BOX(target_widget), create_axis_slider(i));
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return true;
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}
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