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display.cpp
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display.cpp
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/* C/C++ Includes */
#include <stdint.h>
#include <string.h>
/* Application Includes */
#include "display.h"
void get_partial_rgb_value(uint8_t pixel, uint32_t countdown, uint32_t countdown_max, uint8_t * rgb, uint8_t const * const rgb_full)
{
uint32_t countdown_bottom = (countdown_max * pixel) / 5;
uint32_t countdown_partial = countdown - countdown_bottom;
uint32_t countdown_per_px = countdown_max / 5;
rgb[0] = (rgb_full[0] * countdown_partial) / countdown_per_px;
rgb[1] = (rgb_full[1] * countdown_partial) / countdown_per_px;
rgb[2] = (rgb_full[2] * countdown_partial) / countdown_per_px;
}
void get_rgb_value(uint8_t pixel, uint32_t countdown, uint32_t countdown_max, uint8_t * rgb, uint8_t const * const rgb_full)
{
rgb[0] = 0; rgb[1] = 0; rgb[2] = 0;
if (countdown == 0) { return; }
uint8_t last_full_pixel = ((countdown * PIXELS_PER_STRIP) / countdown_max) - 1;
uint8_t partial_pixel = last_full_pixel + 1;
if (last_full_pixel < 5)
{
if (pixel <= last_full_pixel)
{
memcpy(rgb, rgb_full, sizeof(uint8_t) * 3);
}
}
if (pixel == partial_pixel)
{
get_partial_rgb_value(pixel, countdown, countdown_max, rgb, rgb_full);
}
}
#ifdef UNIT_TEST
#define CHECK_RGB_EQUAL(r, g, b, rgb) \
CPPUNIT_ASSERT_EQUAL(r, (int)rgb[0]); \
CPPUNIT_ASSERT_EQUAL(g, (int)rgb[1]); \
CPPUNIT_ASSERT_EQUAL(b, (int)rgb[2]);
#include <cppunit/extensions/TestFactoryRegistry.h>
#include <cppunit/ui/text/TestRunner.h>
#include <cppunit/extensions/HelperMacros.h>
static const uint8_t RGB[3] = {255, 255, 255};
class DisplayTest : public CppUnit::TestFixture {
CPPUNIT_TEST_SUITE(DisplayTest);
CPPUNIT_TEST(testGetRGBForCountdownZero);
CPPUNIT_TEST(testGetRGBForCountdownPartialPixelZero);
CPPUNIT_TEST(testGetRGBForCountdownCompletePixelZero);
CPPUNIT_TEST(testGetRGBForCountdownPartialPixelOne);
CPPUNIT_TEST(testGetRGBForCountdownFullPixelOne);
CPPUNIT_TEST(testGetRGBForCountdownPartialPixelFour);
CPPUNIT_TEST(testGetRGBForCountdownFullPixelFour);
CPPUNIT_TEST_SUITE_END();
void testGetRGBForCountdownZero()
{
uint8_t rgb[3] = {0,0,0};
get_rgb_value(0, 0, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(1, 0, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(2, 0, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(3, 0, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(4, 0, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
}
void testGetRGBForCountdownPartialPixelZero()
{
uint8_t rgb[3] = {0,0,0};
get_rgb_value(0, 1500, 15013, rgb, RGB);
CHECK_RGB_EQUAL(127, 127, 127, rgb);
get_rgb_value(1, 1500, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(2, 1500, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(3, 1500, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(4, 1500, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
}
void testGetRGBForCountdownCompletePixelZero()
{
uint8_t rgb[3] = {0,0,0};
get_rgb_value(0, 3002, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(1, 3002, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(2, 3002, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(3, 3002, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(4, 3002, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
}
void testGetRGBForCountdownPartialPixelOne()
{
uint8_t rgb[3] = {0,0,0};
get_rgb_value(0, 4503, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(1, 4503, 15013, rgb, RGB);
CHECK_RGB_EQUAL(127, 127, 127, rgb);
get_rgb_value(2, 4503, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(3, 4503, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(4, 4503, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
}
void testGetRGBForCountdownFullPixelOne()
{
uint8_t rgb[3] = {0,0,0};
get_rgb_value(0, 6004, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(1, 6004, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(2, 6004, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(3, 6004, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
get_rgb_value(4, 6004, 15013, rgb, RGB);
CHECK_RGB_EQUAL(0, 0, 0, rgb);
}
void testGetRGBForCountdownPartialPixelFour()
{
uint8_t rgb[3] = {0,0,0};
get_rgb_value(0, 14012, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(1, 14012, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(2, 14012, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(3, 14012, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(4, 14012, 15013, rgb, RGB);
CHECK_RGB_EQUAL(170, 170, 170, rgb);
}
void testGetRGBForCountdownFullPixelFour()
{
uint8_t rgb[3] = {0,0,0};
get_rgb_value(0, 15013, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(1, 15013, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(2, 15013, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(3, 15013, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
get_rgb_value(4, 15013, 15013, rgb, RGB);
CHECK_RGB_EQUAL(255, 255, 255, rgb);
}
};
CPPUNIT_TEST_SUITE_REGISTRATION(DisplayTest);
int main()
{
CppUnit::TextUi::TestRunner runner;
CppUnit::TestFactoryRegistry ®istry = CppUnit::TestFactoryRegistry::getRegistry();
runner.addTest( registry.makeTest() );
runner.run();
return 0;
}
#endif