| 1 | /*
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| 2 | * Copyright (c) 2020 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libui
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file Painting routines
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| 34 | */
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| 35 |
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| 36 | #include <errno.h>
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| 37 | #include <gfx/color.h>
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| 38 | #include <gfx/context.h>
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| 39 | #include <gfx/render.h>
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| 40 | #include <ui/paint.h>
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| 41 |
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| 42 | /** Paint bevel.
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| 43 | *
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| 44 | * @param gc Graphic context
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| 45 | * @param rect Rectangle to paint into
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| 46 | * @param tlcolor Top-left color
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| 47 | * @param brcolor Bottom-right color
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| 48 | * @param thickness Bevel thickness in pixels
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| 49 | * @param inside Place to store rectangle of the interior or @c NULL
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| 50 | * @reutrn EOK on success or an error code
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| 51 | */
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| 52 | errno_t ui_paint_bevel(gfx_context_t *gc, gfx_rect_t *rect,
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| 53 | gfx_color_t *tlcolor, gfx_color_t *brcolor, gfx_coord_t thickness,
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| 54 | gfx_rect_t *inside)
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| 55 | {
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| 56 | gfx_rect_t frect;
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| 57 | gfx_coord_t i;
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| 58 | errno_t rc;
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| 59 |
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| 60 | /* Top left */
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| 61 |
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| 62 | rc = gfx_set_color(gc, tlcolor);
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| 63 | if (rc != EOK)
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| 64 | goto error;
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| 65 |
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| 66 | for (i = 0; i < thickness; i++) {
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| 67 | frect.p0.x = rect->p0.x + i;
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| 68 | frect.p0.y = rect->p0.y + i;
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| 69 | frect.p1.x = rect->p1.x - i - 1;
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| 70 | frect.p1.y = rect->p0.y + i + 1;
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| 71 | rc = gfx_fill_rect(gc, &frect);
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| 72 | if (rc != EOK)
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| 73 | goto error;
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| 74 |
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| 75 | frect.p0.x = rect->p0.x + i;
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| 76 | frect.p0.y = rect->p0.y + i + 1;
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| 77 | frect.p1.x = rect->p0.x + i + 1;
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| 78 | frect.p1.y = rect->p1.y - i - 1;
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| 79 | rc = gfx_fill_rect(gc, &frect);
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| 80 | if (rc != EOK)
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| 81 | goto error;
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| 82 | }
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| 83 |
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| 84 | /* Bottom right */
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| 85 |
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| 86 | rc = gfx_set_color(gc, brcolor);
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| 87 | if (rc != EOK)
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| 88 | goto error;
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| 89 |
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| 90 | for (i = 0; i < thickness; i++) {
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| 91 | frect.p0.x = rect->p0.x + i;
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| 92 | frect.p0.y = rect->p1.y - i - 1;
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| 93 | frect.p1.x = rect->p1.x - i - 1;
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| 94 | frect.p1.y = rect->p1.y - i;
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| 95 | rc = gfx_fill_rect(gc, &frect);
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| 96 | if (rc != EOK)
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| 97 | goto error;
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| 98 |
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| 99 | frect.p0.x = rect->p1.x - i - 1;
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| 100 | frect.p0.y = rect->p0.y + i;
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| 101 | frect.p1.x = rect->p1.x - i;
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| 102 | frect.p1.y = rect->p1.y - i;
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| 103 | rc = gfx_fill_rect(gc, &frect);
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| 104 | if (rc != EOK)
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| 105 | goto error;
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| 106 | }
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| 107 |
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| 108 | if (inside != NULL) {
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| 109 | inside->p0.x = rect->p0.x + thickness;
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| 110 | inside->p0.y = rect->p0.y + thickness;
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| 111 | inside->p1.x = rect->p1.x - thickness;
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| 112 | inside->p1.y = rect->p1.y - thickness;
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| 113 | }
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| 114 |
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| 115 | return EOK;
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| 116 | error:
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| 117 | return rc;
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| 118 | }
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| 119 |
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| 120 | /** @}
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| 121 | */
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