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Add support for rotating the screen #2

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Add support for rotating the screen #2

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a45f1a1
Add support for rotating the screen
kamnxt Mar 25, 2016
1cc14ab
Fix rotation
kamnxt Mar 26, 2016
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50 changes: 46 additions & 4 deletions HaD_Badge.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,31 @@ void* nullptr;
SDL_Window *win;
SDL_Renderer *ren;

//Which way the display is rotated (which way "up" is)
#define ROTATION UP

#if ROTATION == UP
#define ROT_XX 1
#define ROT_YY 1
#define ROT_XY 0
#define ROT_YX 0
#elif ROTATION == RIGHT
#define ROT_XX 0
#define ROT_YY 0
#define ROT_XY -1
#define ROT_YX 1
#elif ROTATION == DOWN
#define ROT_XX -1
#define ROT_YY -1
#define ROT_XY 0
#define ROT_YX 0
#elif ROTATION == LEFT
#define ROT_XX 0
#define ROT_YY 0
#define ROT_XY 1
#define ROT_YX -1
#endif

//These display size values are specific to the SDL2 emulator
#define PIXELRADIUS 8
#define PIXELSPACING 5
Expand Down Expand Up @@ -51,12 +76,19 @@ void initDisplay(void) {
printf("SDL_Init Error: %s\n", SDL_GetError());
}

int width =
(ROT_XX != 0 ? 1 : 0) * ((TOTPIXELX*(PIXELSPACING+PIXELRADIUS+PIXELRADIUS))+PIXELSPACING) +
(ROT_XY != 0 ? 1 : 0) * ((TOTPIXELY*(PIXELSPACING+PIXELRADIUS+PIXELRADIUS))+PIXELSPACING);
int height =
(ROT_YY != 0 ? 1 : 0) * ((TOTPIXELY*(PIXELSPACING+PIXELRADIUS+PIXELRADIUS))+PIXELSPACING) +
(ROT_YX != 0 ? 1 : 0) * ((TOTPIXELX*(PIXELSPACING+PIXELRADIUS+PIXELRADIUS))+PIXELSPACING);

win = SDL_CreateWindow(
"sdlTest",
100,
100,
(TOTPIXELX*(PIXELSPACING+PIXELRADIUS+PIXELRADIUS))+PIXELSPACING,
(TOTPIXELY*(PIXELSPACING+PIXELRADIUS+PIXELRADIUS))+PIXELSPACING,
width,
height,
SDL_WINDOW_SHOWN);

if (win == nullptr) {
Expand Down Expand Up @@ -93,10 +125,20 @@ void displayPixel(uint8_t x, uint8_t y, uint8_t state) {
void showSDLpixel(uint8_t x, uint8_t y, uint8_t state){
uint8_t color = GREY;
if (state) { color = RED; }
int newX = (x * ROT_XX) + (y * ROT_XY);
int newY = (x * ROT_YX) + (y * ROT_YY);
if(ROT_XX + ROT_XY < 0)
{
newX = (-ROT_XX * (TOTPIXELX - 1)) + (-ROT_XY * (TOTPIXELY - 1)) + newX;
}
if(ROT_YY + ROT_YX < 0)
{
newY = (-ROT_YX * (TOTPIXELX - 1)) + (-ROT_YY * (TOTPIXELY - 1)) + newY;
}
filledCircleRGBA(
ren,
(x*(PIXELRADIUS+PIXELRADIUS+PIXELSPACING))+PIXELRADIUS+PIXELSPACING,
(y*(PIXELRADIUS+PIXELRADIUS+PIXELSPACING))+PIXELRADIUS+PIXELSPACING,
(newX*(PIXELRADIUS+PIXELRADIUS+PIXELSPACING))+PIXELRADIUS+PIXELSPACING,
(newY*(PIXELRADIUS+PIXELRADIUS+PIXELSPACING))+PIXELRADIUS+PIXELSPACING,
PIXELRADIUS,
colors[color][0],
colors[color][1],
Expand Down