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lol: Added exception when invalid argument is passed to method

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Signed-off-by: Stefan Andritoiu <stefan.andritoiu@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
This commit is contained in:
Andrei Vasiliu 2015-11-19 14:29:51 +02:00 committed by Mihai Tudor Panu
parent fcb36276b7
commit 500e14663b
3 changed files with 16 additions and 15 deletions
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4
examples/java/LoL_exampleSample.java
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@ -41,9 +41,7 @@ public class LoL_exampleSample {
int x = 0, y = 0; int x = 0, y = 0;
while (true) { while (true) {
// revert pixel // revert pixel
short pixel = sensor.getPixel(x, y); sensor.setPixel(x, y, sensor.getPixel(x, y));
pixel = (short) ((pixel == 0) ? 1 : 0);
sensor.setPixel(x, y, pixel);
if (++x == 13) { if (++x == 13) {
x = 0; x = 0;

16
src/lol/lol.cxx
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@ -168,20 +168,22 @@ unsigned char* LoL::getFramebuffer() {
return framebuffer; return framebuffer;
} }
unsigned char LoL::setPixel(int x, int y, unsigned char pixel) void LoL::setPixel(int x, int y, bool pixel)
{ {
if (x < 0 || y < 0 || x >= LOL_X || y >= LOL_Y) if (x < 0 || y < 0 || x >= LOL_X || y >= LOL_Y)
return -1; throw std::invalid_argument(std::string(__FUNCTION__) +
": pixel coordinates out of bounds");
framebuffer[x + LOL_X*y] = (pixel == 0) ? 0 : 1; framebuffer[x + LOL_X*y] = (pixel) ? 1 : 0;
return 0; return;
} }
unsigned char LoL::getPixel(int x, int y) bool LoL::getPixel(int x, int y)
{ {
if (x < 0 || y < 0 || x >= LOL_X || y >= LOL_Y) if (x < 0 || y < 0 || x >= LOL_X || y >= LOL_Y)
return -1; throw std::invalid_argument(std::string(__FUNCTION__) +
": pixel coordinates out of bounds");
return (framebuffer[x + LOL_X*y] == 0) ? 0 : 1; return (framebuffer[x + LOL_X*y] == 0) ? false : true;
} }

11
src/lol/lol.h
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@ -77,18 +77,19 @@ class LoL {
* Gets a pixel at specified coordinates * Gets a pixel at specified coordinates
* @param x Coordinate x * @param x Coordinate x
* @param y Coordinate y * @param y Coordinate y
* @return 1 if the pixel is on, 0 if off, -1 on error * @return true if the pixel is on, false if off
* @throws std::invalid_argument if pixel is out of bounds
*/ */
unsigned char getPixel(int x, int y); bool getPixel(int x, int y);
/** /**
* Sets a pixel at specified coordinates * Sets a pixel at specified coordinates
* @param x Coordinate x * @param x Coordinate x
* @param y Coordinate y * @param y Coordinate y
* @param pixel 0 is off, 1 is on * @param pixel false is off, true is on
* @return 0 if successful, -1 on error * @throws std::invalid_argument if pixel is out of bounds
*/ */
unsigned char setPixel(int x, int y, unsigned char pixel); void setPixel(int x, int y, bool pixel);
private: private:
mraa_gpio_context m_LoLCtx[14]; mraa_gpio_context m_LoLCtx[14];