forked from KolibriOS/kolibrios
153 lines
4.2 KiB
C
153 lines
4.2 KiB
C
/*
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* Copyright 2010 Vincent Sanders <vince@kyllikki.org>
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*
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* This file is part of libnsfb, http://www.netsurf-browser.org/
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* Licenced under the MIT License,
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* http://www.opensource.org/licenses/mit-license.php
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*/
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/** \file
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* cursor (implementation).
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*/
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#include <stdbool.h>
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#include <stdlib.h>
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#include "libnsfb.h"
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#include "libnsfb_plot.h"
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#include "libnsfb_cursor.h"
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#include "nsfb.h"
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#include "cursor.h"
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#include "plot.h"
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#include "surface.h"
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bool nsfb_cursor_init(nsfb_t *nsfb)
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{
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if (nsfb->cursor != NULL)
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return false;
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nsfb->cursor = calloc(1, sizeof(struct nsfb_cursor_s));
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if (nsfb->cursor == NULL)
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return false;
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nsfb->cursor->loc.x0 = nsfb->width / 2;
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nsfb->cursor->loc.y0 = nsfb->height / 2;
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return true;
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}
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bool nsfb_cursor_set(nsfb_t *nsfb, const nsfb_colour_t *pixel,
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int bmp_width, int bmp_height, int bmp_stride,
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int hotspot_x, int hotspot_y)
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{
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if (nsfb->cursor == NULL)
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return false;
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nsfb->cursor->pixel = pixel;
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nsfb->cursor->bmp_width = bmp_width;
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nsfb->cursor->bmp_height = bmp_height;
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nsfb->cursor->bmp_stride = bmp_stride;
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nsfb->cursor->loc.x1 = nsfb->cursor->loc.x0 + nsfb->cursor->bmp_width;
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nsfb->cursor->loc.y1 = nsfb->cursor->loc.y0 + nsfb->cursor->bmp_height;
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nsfb->cursor->hotspot_x = hotspot_x;
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nsfb->cursor->hotspot_y = hotspot_y;
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return nsfb->surface_rtns->cursor(nsfb, nsfb->cursor);
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}
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bool nsfb_cursor_loc_set(nsfb_t *nsfb, const nsfb_bbox_t *loc)
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{
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if (nsfb->cursor == NULL)
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return false;
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nsfb->cursor->loc = *loc;
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nsfb->cursor->loc.x1 = nsfb->cursor->loc.x0 + nsfb->cursor->bmp_width;
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nsfb->cursor->loc.y1 = nsfb->cursor->loc.y0 + nsfb->cursor->bmp_height;
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return nsfb->surface_rtns->cursor(nsfb, nsfb->cursor);
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}
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bool nsfb_cursor_loc_get(nsfb_t *nsfb, nsfb_bbox_t *loc)
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{
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if (nsfb->cursor == NULL)
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return false;
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*loc = nsfb->cursor->loc;
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return true;
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}
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/* documented in cursor.h */
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bool nsfb_cursor_plot(nsfb_t *nsfb, struct nsfb_cursor_s *cursor)
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{
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int sav_size;
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nsfb_bbox_t sclip; /* saved clipping area */
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nsfb->plotter_fns->get_clip(nsfb, &sclip);
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nsfb->plotter_fns->set_clip(nsfb, NULL);
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/* offset cursor rect for hotspot */
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cursor->loc.x0 -= cursor->hotspot_x;
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cursor->loc.y0 -= cursor->hotspot_y;
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cursor->loc.x1 -= cursor->hotspot_x;
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cursor->loc.y1 -= cursor->hotspot_y;
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cursor->savloc = cursor->loc;
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cursor->sav_width = cursor->savloc.x1 - cursor->savloc.x0;
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cursor->sav_height = cursor->savloc.y1 - cursor->savloc.y0;
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sav_size = cursor->sav_width * cursor->sav_height * sizeof(nsfb_colour_t);
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if (cursor->sav_size < sav_size) {
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cursor->sav = realloc(cursor->sav, sav_size);
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cursor->sav_size = sav_size;
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}
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nsfb->plotter_fns->readrect(nsfb, &cursor->savloc, cursor->sav);
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cursor->sav_width = cursor->savloc.x1 - cursor->savloc.x0;
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cursor->sav_height = cursor->savloc.y1 - cursor->savloc.y0;
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nsfb->plotter_fns->set_clip(nsfb, NULL);
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nsfb->plotter_fns->bitmap(nsfb,
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&cursor->loc,
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cursor->pixel,
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cursor->bmp_width,
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cursor->bmp_height,
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cursor->bmp_stride,
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true);
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/* undo hotspot offset */
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cursor->loc.x0 += cursor->hotspot_x;
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cursor->loc.y0 += cursor->hotspot_y;
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cursor->loc.x1 += cursor->hotspot_x;
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cursor->loc.y1 += cursor->hotspot_y;
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nsfb->plotter_fns->set_clip(nsfb, &sclip);
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cursor->plotted = true;
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return true;
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}
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bool nsfb_cursor_clear(nsfb_t *nsfb, struct nsfb_cursor_s *cursor)
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{
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nsfb_bbox_t sclip; /* saved clipping area */
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nsfb->plotter_fns->get_clip(nsfb, &sclip);
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nsfb->plotter_fns->set_clip(nsfb, NULL);
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nsfb->plotter_fns->bitmap(nsfb,
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&cursor->savloc,
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cursor->sav,
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cursor->sav_width,
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cursor->sav_height,
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cursor->sav_width,
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false);
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nsfb->plotter_fns->set_clip(nsfb, &sclip);
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cursor->plotted = false;
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return true;
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}
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