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[hackover2013-badge-firmware.git] / drivers / displays / tft / controls / huechart.c
1 /**************************************************************************/
2 /*!
3 @file huechart.c
4 @author K. Townsend (microBuilder.eu)
5
6 @brief Renders a hue/saturation/brightness chart
7
8 @section LICENSE
9
10 Software License Agreement (BSD License)
11
12 Copyright (c) 2012, K. Townsend
13 All rights reserved.
14
15 Redistribution and use in source and binary forms, with or without
16 modification, are permitted provided that the following conditions are met:
17 1. Redistributions of source code must retain the above copyright
18 notice, this list of conditions and the following disclaimer.
19 2. Redistributions in binary form must reproduce the above copyright
20 notice, this list of conditions and the following disclaimer in the
21 documentation and/or other materials provided with the distribution.
22 3. Neither the name of the copyright holders nor the
23 names of its contributors may be used to endorse or promote products
24 derived from this software without specific prior written permission.
25
26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
27 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
28 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
29 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
30 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
32 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
33 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37 /**************************************************************************/
38 #include <string.h>
39
40 #include "huechart.h"
41
42 /**************************************************************************/
43 /*!
44 @brief Draws a rectangular hue chart showing the full spectrum
45 of fully saturated colors
46
47 @param[in] x
48 Starting x co-ordinate
49 @param[in] y
50 Starting y co-ordinate
51 @param[in] width
52 Width of the chart in pixels
53 @param[in] height
54 Width of the chart in pixels
55 */
56 /**************************************************************************/
57 void huechartRender(uint16_t x, uint16_t y, uint16_t width, uint16_t height, theme_t theme)
58 {
59 uint32_t delta = (height - 2) / 6;
60
61 // Draw border
62 drawRectangle(x, y, x+width, y+height, theme.colorBorderDarker);
63
64 // Draw gradient (R > M > B > C > G > Y > R)
65 drawGradient(x+1, y+1, x+width-1, y+delta-1, COLOR_RED, COLOR_MAGENTA);
66 drawGradient(x+1, y+delta, x+width-1, y+(delta*2)-1, COLOR_MAGENTA, COLOR_BLUE);
67 drawGradient(x+1, y+(delta*2), x+width-1, y+(delta*3)-1, COLOR_BLUE, COLOR_CYAN);
68 drawGradient(x+1, y+(delta*3), x+width-1, y+(delta*4)-1, COLOR_CYAN, COLOR_GREEN);
69 drawGradient(x+1, y+(delta*4), x+width-1, y+(delta*5)-1, COLOR_GREEN, COLOR_YELLOW);
70 drawGradient(x+1, y+(delta*5), x+width-1, y+height-1, COLOR_YELLOW, COLOR_RED);
71 }
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