掌機 - Miyoo A30 - C/C++ - 閃屏測試

main.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <SDL.h>

int main(int argc, char **argv)
{
    int cc = 0;
    SDL_Rect rt = {0};
    SDL_Surface *screen = NULL;
    SDL_Window *window = NULL;
    SDL_Texture *texture = NULL;
    SDL_Renderer *renderer = NULL;

    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
    window = SDL_CreateWindow("Main", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 480, 640, SDL_WINDOW_SHOWN);
    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
    texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGB888, SDL_TEXTUREACCESS_TARGET, 640, 480);
    screen = SDL_CreateRGBSurface(0, 640, 480, 32, 0, 0, 0, 0);

    cc = 600;
    rt.x = (480 - 640) / 2;
    rt.y = (640 - 480) / 2;
    rt.w = 640;
    rt.h = 480;
    while (cc--) {
        switch (cc % 3) {
        case 0:
            SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0xff, 0x00, 0x00));
            break;
        case 1:
            SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0x00, 0xff, 0x00));
            break;
        case 2:
            SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0x00, 0x00, 0xff));
            break;
        }
        SDL_SetRenderTarget(renderer, NULL);
        SDL_UpdateTexture(texture, NULL, screen->pixels, screen->pitch);
        SDL_RenderCopyEx(renderer, texture, NULL, &rt, 270, NULL, SDL_FLIP_NONE);
        SDL_RenderPresent(renderer);
        SDL_SetRenderTarget(renderer, texture);
        SDL_Delay(60 / 1000);
    }

    SDL_FreeSurface(screen);
    SDL_DestroyTexture(texture);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 0;
}

Makefile

TARGET  = main
CROSS   = arm-linux-gnueabihf-
CFLAGS  = -I/opt/staging_dir/target/usr/include/SDL2
LDFLAGS = /opt/staging_dir/target/rootfs/usr/miyoo/lib/libSDL2-2.0.so.0

export PATH=/opt/prebuilt_a30/bin:$(shell echo $$PATH)

all:
	$(CROSS)gcc main.c -o $(TARGET) $(CFLAGS) $(LDFLAGS)

clean:
	rm -rf $(TARGET)

編譯

$ cd

$ wget https://github.com/steward-fu/website/releases/download/miyoo-a30/gcc-linaro-7.5.0-arm-linux-gnueabihf.tar.gz
$ tar xvf gcc-linaro-7.5.0-arm-linux-gnueabihf.tar.gz
$ sudo mv prebuilt_a30 /opt

$ wget https://github.com/steward-fu/website/releases/download/miyoo-a30/staging_dir.tgz
$ tar xvf staging_dir.tgz
$ sudo mv staging_dir /opt

$ make
    arm-linux-gnueabihf-gcc main.c -o main -I/opt/staging_dir/target/usr/include/SDL2 /opt/staging_dir/target/rootfs/usr/miyoo/lib/libSDL2-2.0.so.0