| 1 | /*
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| 2 | * Copyright (c) 2011 Petr Koupy
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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 libc
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | */
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| 35 |
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| 36 | #ifndef LIBC_IO_PIXELMAP_H_
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| 37 | #define LIBC_IO_PIXELMAP_H_
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| 38 |
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| 39 | #include <sys/types.h>
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| 40 | #include <unistd.h>
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| 41 | #include <io/pixel.h>
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| 42 |
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| 43 | typedef struct {
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| 44 | sysarg_t width;
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| 45 | sysarg_t height;
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| 46 | pixel_t *data;
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| 47 | } pixelmap_t;
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| 48 |
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| 49 | static inline pixel_t *pixelmap_pixel_at(
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| 50 | pixelmap_t *pixelmap,
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| 51 | sysarg_t x,
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| 52 | sysarg_t y)
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| 53 | {
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| 54 | if (x < pixelmap->width && y < pixelmap->height) {
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| 55 | size_t offset = y * pixelmap->width + x;
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| 56 | pixel_t *pixel = pixelmap->data + offset;
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| 57 | return pixel;
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| 58 | } else {
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| 59 | return NULL;
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| 60 | }
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| 61 | }
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| 62 |
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| 63 | static inline void pixelmap_put_pixel(
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| 64 | pixelmap_t * pixelmap,
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| 65 | sysarg_t x,
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| 66 | sysarg_t y,
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| 67 | pixel_t pixel)
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| 68 | {
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| 69 | pixel_t *target = pixelmap_pixel_at(pixelmap, x, y);
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| 70 | if (target != NULL) {
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| 71 | *target = pixel;
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | static inline pixel_t pixelmap_get_pixel(
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| 76 | pixelmap_t *pixelmap,
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| 77 | sysarg_t x,
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| 78 | sysarg_t y)
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| 79 | {
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| 80 | pixel_t *source = pixelmap_pixel_at(pixelmap, x, y);
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| 81 | if (source != NULL) {
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| 82 | return *source;
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| 83 | } else {
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| 84 | return 0;
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | #endif
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| 89 |
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| 90 | /** @}
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| 91 | */
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