chore: move *.c *.h to src/, build in build/
This commit is contained in:
Stéphane Lesimple
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src/spiral.c
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265
src/spiral.c
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/* dvdisaster: Additional error correction for optical media.
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* Copyright (C) 2004-2017 Carsten Gnoerlich.
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*
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* Email: carsten@dvdisaster.org -or- cgnoerlich@fsfe.org
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* Project homepage: http://www.dvdisaster.org
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*
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* This file is part of dvdisaster.
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*
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* dvdisaster 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 3 of the License, or
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* (at your option) any later version.
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*
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* dvdisaster 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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*
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* You should have received a copy of the GNU General Public License
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* along with dvdisaster. If not, see <http://www.gnu.org/licenses/>.
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*/
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// DVDISASTER_GUI_FILE
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#include "dvdisaster.h"
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/***
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*** Archimede did not publish his source,
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*** so we have to write our own routines ;-)
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*/
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/*
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* Allocate and fill in the spiral data structure
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*/
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Spiral* CreateSpiral(GdkColor *outline, GdkColor *fill,
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int start_radius, int segment_size, int n_segments)
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{ Spiral *spiral = g_malloc0(sizeof(Spiral));
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double a = 0.0;
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double scale_o = start_radius + segment_size;
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double ring_expand;
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int i;
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spiral->startRadius = start_radius;
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spiral->segmentSize = segment_size;
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spiral->segmentCount = spiral->segmentClipping = n_segments;
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spiral->segmentPos = g_malloc(n_segments * sizeof(double));
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spiral->segmentColor = g_malloc(n_segments * sizeof(GdkColor*));
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spiral->outline = outline;
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spiral->cursorPos = -1;
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for(i=0; i<n_segments; i++)
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{
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spiral->segmentPos[i] = a;
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spiral->segmentColor[i] = fill;
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ring_expand = ((double)segment_size * a) / (2.0*M_PI);
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a += atan((double)segment_size / scale_o);
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scale_o = (double)start_radius + ring_expand + (double)segment_size;
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}
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spiral->diameter = 2.0 * scale_o;
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return spiral;
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}
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void SetSpiralWidget(Spiral *spiral, GtkWidget *widget)
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{ GtkAllocation *al = &widget->allocation;
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if(!spiral->drawable)
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{ spiral->drawable = widget->window;
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spiral->mx = al->width/2;
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spiral->my = al->height/2;
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}
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}
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void FreeSpiral(Spiral *spiral)
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{ g_free(spiral->segmentPos);
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g_free(spiral->segmentColor);
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g_free(spiral);
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}
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/*
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* Fill spiral segments with given color
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*/
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void FillSpiral(Spiral *spiral, GdkColor *color)
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{ int i;
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if(spiral)
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for(i=0; i<spiral->segmentCount; i++)
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spiral->segmentColor[i] = color;
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}
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/*
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* Draw the whole spiral
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*/
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void DrawSpiral(Spiral *spiral)
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{ double a;
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int xi0,yi0,xo0,yo0;
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double scale_i,scale_o;
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int i;
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GdkPoint points[4];
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if(!spiral->drawable) return;
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scale_i = spiral->startRadius;
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scale_o = spiral->startRadius + spiral->segmentSize;
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xi0 = spiral->mx + spiral->startRadius;
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yi0 = yo0 = spiral->my;
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xo0 = xi0 + spiral->segmentSize;
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for(a=0.0, i=0; i<spiral->segmentClipping; i++)
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{ int xi1,yi1,xo1,yo1;
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double ring_expand = ((double)spiral->segmentSize * a) / (2.0*M_PI);
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a += atan((double)spiral->segmentSize / scale_o);
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scale_i = (double)spiral->startRadius + ring_expand;
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scale_o = scale_i + spiral->segmentSize;
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xi1 = spiral->mx + scale_i*cos(a);
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yi1 = spiral->my + scale_i*sin(a);
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xo1 = spiral->mx + scale_o*cos(a);
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yo1 = spiral->my + scale_o*sin(a);
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points[0].x = xi0; points[0].y = yi0;
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points[1].x = xo0; points[1].y = yo0;
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points[2].x = xo1; points[2].y = yo1;
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points[3].x = xi1; points[3].y = yi1;
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gdk_gc_set_rgb_fg_color(Closure->drawGC, spiral->segmentColor[i]);
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gdk_draw_polygon(spiral->drawable, Closure->drawGC, TRUE, points, 4);
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gdk_gc_set_rgb_fg_color(Closure->drawGC, spiral->outline);
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gdk_draw_polygon(spiral->drawable, Closure->drawGC, FALSE, points, 4);
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xi0 = xi1; yi0 = yi1;
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xo0 = xo1; yo0 = yo1;
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}
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}
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/*
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* Draw just one segment of the spiral
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*/
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void DrawSpiralSegment(Spiral *spiral, GdkColor *color, int segment)
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{ double a;
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double scale_i,scale_o,ring_expand;
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GdkPoint points[4];
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if(segment<0 || segment>=spiral->segmentClipping)
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return;
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a = spiral->segmentPos[segment];
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ring_expand = ((double)spiral->segmentSize * a) / (2.0*M_PI);
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scale_i = (double)spiral->startRadius + ring_expand;
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scale_o = scale_i + spiral->segmentSize;
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points[0].x = spiral->mx + scale_i*cos(a);
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points[0].y = spiral->my + scale_i*sin(a);
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points[1].x = spiral->mx + scale_o*cos(a);
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points[1].y = spiral->my + scale_o*sin(a);
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a += atan((double)spiral->segmentSize / scale_o);
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ring_expand = ((double)spiral->segmentSize * a) / (2.0*M_PI);
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scale_i = (double)spiral->startRadius + ring_expand;
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scale_o = scale_i + spiral->segmentSize;
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points[3].x = spiral->mx + scale_i*cos(a);
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points[3].y = spiral->my + scale_i*sin(a);
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points[2].x = spiral->mx + scale_o*cos(a);
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points[2].y = spiral->my + scale_o*sin(a);
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spiral->segmentColor[segment] = color;
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gdk_gc_set_rgb_fg_color(Closure->drawGC, color);
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gdk_draw_polygon(spiral->drawable, Closure->drawGC, TRUE, points, 4);
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gdk_gc_set_rgb_fg_color(Closure->drawGC, spiral->outline);
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gdk_draw_polygon(spiral->drawable, Closure->drawGC, FALSE, points, 4);
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}
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/*
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* Draw a label above or below the spiral
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*/
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void DrawSpiralLabel(Spiral *spiral, PangoLayout *layout,
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char *text, GdkColor *color, int x, int line)
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{ GdkDrawable *d = spiral->drawable;
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int w,h,y;
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SetText(layout, text, &w, &h);
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if(line > 0) y = spiral->my + spiral->diameter / 2 + 20 + (line-1) * (10 + h);
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else y = spiral->my - spiral->diameter / 2 - 20 - h + (line+1) * (10 + h);
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gdk_gc_set_rgb_fg_color(Closure->drawGC, color);
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gdk_draw_rectangle(d, Closure->drawGC, TRUE, x, y+(h-6)/2, 6, 6);
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gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->grid);
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gdk_draw_rectangle(d, Closure->drawGC, FALSE, x, y+(h-6)/2, 6, 6);
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gdk_gc_set_rgb_fg_color(Closure->drawGC, Closure->foreground);
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gdk_draw_layout(d, Closure->drawGC, x+10, y, layout);
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}
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/*
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* Move the cursor (a highlighted segment) to a new position.
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* Moving to segment -1 means to disable the cursor.
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*/
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void MoveSpiralCursor(Spiral *spiral, int to_segment)
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{
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if(to_segment == spiral->cursorPos)
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return;
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if(to_segment > spiral->segmentClipping)
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return;
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/* Erase old cursor */
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if(spiral->cursorPos >= 0)
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DrawSpiralSegment(spiral, spiral->colorUnderCursor, spiral->cursorPos);
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/* Moving to -1 means cursor off */
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spiral->cursorPos = to_segment;
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if(to_segment < 0)
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return;
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if(to_segment > spiral->segmentCount-1)
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{ spiral->cursorPos = -1;
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return;
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}
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/* Draw cursor at new place */
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spiral->colorUnderCursor = spiral->segmentColor[to_segment];
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DrawSpiralSegment(spiral, Closure->blueSector, to_segment);
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}
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/*
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* Wrapper for moving the spiral cursor from non-GUI thread
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*/
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typedef struct _cursor_info
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{ Spiral *spiral;
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int segment;
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} cursor_info;
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static gboolean cursor_idle_func(gpointer data)
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{ cursor_info *ci = (cursor_info*)data;
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MoveSpiralCursor(ci->spiral, ci->segment);
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g_free(ci);
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return FALSE;
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}
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void ChangeSpiralCursor(Spiral *spiral, int segment)
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{
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if(segment != spiral->cursorPos)
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{ cursor_info *ci = g_malloc(sizeof(cursor_info));
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ci->spiral = spiral;
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ci->segment = segment;
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g_idle_add(cursor_idle_func, ci);
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}
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}
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