掌機 - Z-Pocket Game Pro (ZPG Pro) - libffb.c、libffb.h

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <string.h>
#include <linux/fb.h>
#include <SDL.h>
#include <SDL_image.h>
#include <SDL_ttf.h>

#include "libffb.h"

static uint32_t sdl_w = 0;
static uint32_t sdl_h = 0;
static uint32_t sdl_bpp = 0;
static SDL_Joystick *joy = NULL;
static SDL_Window *window = NULL;
static SDL_Surface *screen = NULL;
static SDL_Texture *texture = NULL;
static SDL_Renderer *renderer = NULL;

int MYSDL_Init(uint32_t v)
{
    int r = 0;

    r = SDL_Init(v | SDL_INIT_JOYSTICK);
    joy = SDL_JoystickOpen(0);
    printf("%s, r=%d, joy=%p\n", __func__, r, joy);
    return r;
}

int MYSDL_WasInit(uint32_t v)
{
    return SDL_WasInit(v);
}

int MYSDL_InitSubSystem(uint32_t v)
{
    int r = 0;
    
    r = SDL_InitSubSystem(v);
    printf("%s, r=%d\n", __func__, r);
    return r;
}

void MYSDL_QuitSubSystem(uint32_t v)
{
    SDL_QuitSubSystem(v);
}

SDL_Surface* MYSDL_SetVideoMode(uint32_t w, uint32_t h, uint32_t bpp, uint32_t flags)
{
    sdl_w = w;
    sdl_h = h;
    sdl_bpp = bpp;

    window = SDL_CreateWindow("libffb", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, SDL_WINDOW_SHOWN);
    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
    screen = SDL_CreateRGBSurface(0, w, h, bpp, 0, 0, 0, 0);
    texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGB565, SDL_TEXTUREACCESS_STREAMING, w, h);
    printf("%s, w=%d, h=%d, bpp=%d\n", __func__, w, h, bpp);
    return screen;
}

void MYSDL_Flip(SDL_Surface *s)
{
    SDL_UpdateTexture(texture, NULL, s->pixels, s->pitch);
    SDL_RenderClear(renderer);
    SDL_RenderCopy(renderer, texture, NULL, NULL);
    SDL_RenderPresent(renderer);
}

void MYSDL_Quit(void)
{
    SDL_FreeSurface(screen);
    SDL_DestroyTexture(texture);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);

    if (joy) {
        SDL_JoystickClose(joy);
    }
    SDL_Quit();
}

int MYSDL_PollEvent(uint32_t *type, uint32_t *btn)
{
    int r = 0;
    SDL_Event e = { 0 };

    r = SDL_PollEvent(&e);
    *type = e.type & 0xff;
    *btn = e.jbutton.button;
    return r;
}

libffb.h

#ifndef __FFB_H__
#define __FFB_H__

#ifdef ZPG
    #define MYSDL_KEYDOWN     3
    #define MYSDL_KEYUP       4

    #define MYSDLK_LALT       0
    #define MYSDLK_LCTRL      1
    #define MYSDLK_SPACE      2
    #define MYSDLK_LSHIFT     3
    #define MYSDLK_TAB        4
    #define MYSDLK_BACKSPACE  5
    #define MYSDLK_PAGEUP     6
    #define MYSDLK_PAGEDOWN   7
    #define MYSDLK_UP         8
    #define MYSDLK_DOWN       9
    #define MYSDLK_LEFT       10
    #define MYSDLK_RIGHT      11
    #define MYSDLK_HOME       12
    #define MYSDLK_END        13
    #define MYSDLK_ESCAPE     14
    #define MYSDLK_RETURN     15
    #define MYSDLK_VOLUP      16
    #define MYSDLK_VOLDOWN    17

    int MYSDL_Init(uint32_t);
    int MYSDL_WasInit(uint32_t);
    int MYSDL_InitSubSystem(uint32_t);
    void MYSDL_QuitSubSystem(uint32_t);
    SDL_Surface* MYSDL_SetVideoMode(uint32_t, uint32_t, uint32_t, uint32_t);
    void MYSDL_Quit(void);
    void MYSDL_Flip(SDL_Surface*);
    int MYSDL_PollEvent(uint32_t*, uint32_t*);
#else
    #define MYSDL_KEYDOWN       SDL_KEYDOWN
    #define MYSDL_KEYUP         SDL_KEYUP

    #define MYSDLK_LALT         SDLK_LALT
    #define MYSDLK_LCTRL        SDLK_LCTRL
    #define MYSDLK_SPACE        SDLK_SPACE
    #define MYSDLK_LSHIFT       SDLK_LSHIFT
    #define MYSDLK_TAB          SDLK_TAB
    #define MYSDLK_BACKSPACE    SDLK_BACKSPACE
    #define MYSDLK_PAGEUP       SDLK_PAGEUP
    #define MYSDLK_PAGEDOWN     SDLK_PAGEDOWN
    #define MYSDLK_UP           SDLK_UP
    #define MYSDLK_DOWN         SDLK_DOWN
    #define MYSDLK_LEFT         SDLK_LEFT
    #define MYSDLK_RIGHT        SDLK_RIGHT
    #define MYSDLK_HOME         SDLK_HOME
    #define MYSDLK_END          SDLK_END
    #define MYSDLK_ESCAPE       SDLK_ESCAPE
    #define MYSDLK_RETURN       SDLK_RETURN
    #define MYSDLK_VOLUP        SDLK_VOLUP
    #define MYSDLK_VOLDOWN      SDLK_VOLDOWN

    #define MYSDL_Init          SDL_Init
    #define MYSDL_InitSubSystem SDL_InitSubSystem
    #define MYSDL_SetVideoMode  SDL_SetVideoMode
    #define MYSDL_Quit          SDL_Quit
    #define MYSDL_Flip          SDL_Flip
    #define MYSDL_PollEvent     SDL_PollEvent
#endif

#endif

編譯

$ gcc libffb.c -DZPG -fPIC -shared -o libffbcc.so -ggdb -lSDL2 -I/usr/include/SDL2
$ g++ libffb.c -DZPG -fPIC -shared -o libffbcxx.so -ggdb -lSDL2 -I/usr/include/SDL2 -fpermissive