diff options
| -rw-r--r-- | test/sdl2/.gitignore | 2 | ||||
| -rw-r--r-- | test/sdl2/main.c | 48 | ||||
| -rw-r--r-- | test/sdl2/makefile | 18 | ||||
| -rw-r--r-- | test/sdl2/readme.md | 6 |
4 files changed, 74 insertions, 0 deletions
diff --git a/test/sdl2/.gitignore b/test/sdl2/.gitignore new file mode 100644 index 0000000..f0c9b81 --- /dev/null +++ b/test/sdl2/.gitignore @@ -0,0 +1,2 @@ +*.o +main diff --git a/test/sdl2/main.c b/test/sdl2/main.c new file mode 100644 index 0000000..beddc3f --- /dev/null +++ b/test/sdl2/main.c @@ -0,0 +1,48 @@ +#include <stdlib.h> +#include <stdbool.h> +#include <math.h> +#include <SDL2/SDL.h> + +#define UPSCALE_FACTOR 3 +#define WIN_HEIGHT 240 +#define WIN_WIDTH 320 +#define FPS 60 + +static void pixel(SDL_Renderer* r, unsigned px, unsigned py, unsigned cr, unsigned cg, unsigned cb) { + SDL_SetRenderDrawColor(r, cr, cg, cb, 255); + SDL_RenderFillRect(r, &(SDL_Rect) {.x = px * UPSCALE_FACTOR, .y = py * UPSCALE_FACTOR, .w = UPSCALE_FACTOR, .h = UPSCALE_FACTOR}); +} + +int main() { + SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS); + SDL_Window *window = SDL_CreateWindow("sdl2 test", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIN_WIDTH * UPSCALE_FACTOR, WIN_HEIGHT * UPSCALE_FACTOR, SDL_WINDOW_SHOWN); + SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED); + + SDL_Event e; + unsigned long frame = 0; + while (true) { + uint32_t start = SDL_GetTicks(); + frame++; + while (SDL_PollEvent(&e)) if (e.type == SDL_QUIT) exit(0); + + SDL_RenderClear(renderer); + + for (unsigned i = 0; i < WIN_WIDTH; i++) { + for (unsigned j = 0; j < WIN_HEIGHT; j++) { + pixel(renderer, i, j, (unsigned)(sqrt(i * 20) + frame) % 255, (i * j + frame) % 255, (j * 20) % 255); + } + } + + SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255); + SDL_RenderPresent(renderer); + + uint32_t end = SDL_GetTicks(); + int wait_for = 1000 / FPS - (end - start); + if (wait_for > 0) SDL_Delay(wait_for); + } + + SDL_DestroyRenderer(renderer); + SDL_DestroyWindow(window); + SDL_Quit(); + return 0; +} diff --git a/test/sdl2/makefile b/test/sdl2/makefile new file mode 100644 index 0000000..4c26dc3 --- /dev/null +++ b/test/sdl2/makefile @@ -0,0 +1,18 @@ +CC = gcc +LD = gcc +RM = rm -f +TARGET = main +LFLAGS += -lSDL2 -lm +OBJS += main.o + +all: $(TARGET) + +%.o: %.c + $(CC) -c $(CFLAGS) $< -o $@ + +$(TARGET): $(OBJS) + $(LD) $^ $(LFLAGS) -o $@ + +clean: + $(RM) $(TARGET) $(OBJS) + diff --git a/test/sdl2/readme.md b/test/sdl2/readme.md new file mode 100644 index 0000000..940e315 --- /dev/null +++ b/test/sdl2/readme.md @@ -0,0 +1,6 @@ +# sdl2 test + +this is a simple POC that makes a window to draw PPU graphics to using SDL2. +this code will be moved to the stm32/ppu directory, and the stm32's makefile +will be edited to include a sim target for building the game for desktop +debugging. |