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Viewing changes to uspace/lib/gui/canvas.c

  • Committer: Jiri Svoboda
  • Date: 2013-04-19 18:38:18 UTC
  • mfrom: (1527.1.284 main-clone)
  • Revision ID: jiri@wiwaxia-20130419183818-nvfibuh4t5qol0e3
Merge mainline chages.

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uspace/lib/gui/canvas.c
 
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/*
 
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 * Copyright (c) 2013 Martin Decky
 
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 * All rights reserved.
 
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 *
 
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 * Redistribution and use in source and binary forms, with or without
 
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 * modification, are permitted provided that the following conditions
 
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 * are met:
 
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 *
 
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 * - Redistributions of source code must retain the above copyright
 
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 *   notice, this list of conditions and the following disclaimer.
 
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 * - Redistributions in binary form must reproduce the above copyright
 
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 *   notice, this list of conditions and the following disclaimer in the
 
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 *   documentation and/or other materials provided with the distribution.
 
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 * - The name of the author may not be used to endorse or promote products
 
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 *   derived from this software without specific prior written permission.
 
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 *
 
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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 */
 
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/** @addtogroup gui
 
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 * @{
 
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 */
 
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/**
 
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 * @file
 
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 */
 
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#include <malloc.h>
 
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#include <transform.h>
 
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#include <source.h>
 
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#include <surface.h>
 
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#include <drawctx.h>
 
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#include "window.h"
 
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#include "canvas.h"
 
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static void paint_internal(widget_t *widget)
 
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{
 
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        canvas_t *canvas = (canvas_t *) widget;
 
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        surface_t *surface = window_claim(canvas->widget.window);
 
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        if (!surface) {
 
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                window_yield(canvas->widget.window);
 
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        }
 
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        transform_t transform;
 
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        transform_identity(&transform);
 
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        transform_translate(&transform, widget->hpos, widget->vpos);
 
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        source_t source;
 
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        source_init(&source);
 
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        source_set_transform(&source, transform);
 
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        source_set_texture(&source, canvas->surface, false);
 
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        drawctx_t drawctx;
 
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        drawctx_init(&drawctx, surface);
 
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        drawctx_set_source(&drawctx, &source);
 
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        drawctx_transfer(&drawctx, widget->hpos, widget->vpos, widget->width,
 
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            widget->height);
 
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        window_yield(canvas->widget.window);
 
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}
 
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void deinit_canvas(canvas_t *canvas)
 
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{
 
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        widget_deinit(&canvas->widget);
 
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}
 
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static void canvas_destroy(widget_t *widget)
 
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{
 
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        canvas_t *canvas = (canvas_t *) widget;
 
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        deinit_canvas(canvas);
 
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        free(canvas);
 
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}
 
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static void canvas_reconfigure(widget_t *widget)
 
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{
 
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        /* No-op */
 
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}
 
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static void canvas_rearrange(widget_t *widget, sysarg_t hpos, sysarg_t vpos,
 
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    sysarg_t width, sysarg_t height)
 
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{
 
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        canvas_t *canvas = (canvas_t *) widget;
 
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        widget_modify(widget, hpos, vpos, canvas->width, canvas->height);
 
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        paint_internal(widget);
 
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}
 
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static void canvas_repaint(widget_t *widget)
 
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{
 
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        paint_internal(widget);
 
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        window_damage(widget->window);
 
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}
 
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static void canvas_handle_keyboard_event(widget_t *widget, kbd_event_t event)
 
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{
 
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        /* No-op */
 
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}
 
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static void canvas_handle_position_event(widget_t *widget, pos_event_t event)
 
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{
 
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        /* No-op */
 
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}
 
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bool init_canvas(canvas_t *canvas, widget_t *parent, sysarg_t width,
 
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    sysarg_t height, surface_t *surface)
 
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{
 
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        widget_init(&canvas->widget, parent);
 
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        canvas->widget.width = width;
 
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        canvas->widget.height = height;
 
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        canvas->widget.width_min = width;
 
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        canvas->widget.height_min = height;
 
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        canvas->widget.width_ideal = width;
 
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        canvas->widget.height_ideal = height;
 
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        canvas->widget.width_max = width;
 
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        canvas->widget.height_max = height;
 
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        canvas->widget.destroy = canvas_destroy;
 
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        canvas->widget.reconfigure = canvas_reconfigure;
 
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        canvas->widget.rearrange = canvas_rearrange;
 
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        canvas->widget.repaint = canvas_repaint;
 
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        canvas->widget.handle_keyboard_event = canvas_handle_keyboard_event;
 
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        canvas->widget.handle_position_event = canvas_handle_position_event;
 
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        canvas->width = width;
 
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        canvas->height = height;
 
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        canvas->surface = surface;
 
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        return true;
 
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}
 
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canvas_t *create_canvas(widget_t *parent, sysarg_t width, sysarg_t height,
 
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    surface_t *surface)
 
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{
 
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        canvas_t *canvas = (canvas_t *) malloc(sizeof(canvas_t));
 
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        if (!canvas)
 
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                return NULL;
 
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        if (init_canvas(canvas, parent, width, height, surface))
 
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                return canvas;
 
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        free(canvas);
 
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        return NULL;
 
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}
 
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/** @}
 
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 */