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#include 

#include 

#include 

#include 

#include "pixlib3.h"

#include "pixdriver.h"

#define DISPLAY_VERSION         0x0200  /*      2.00     */

#define SRV_GETVERSION              0

#define SRV_GET_CAPS                3

#define BUFFER_SIZE(n) ((n)*sizeof(uint32_t))

#define __ALIGN_MASK(x,mask)  (((x)+(mask))&~(mask))

#define ALIGN(x,a)            __ALIGN_MASK(x,(typeof(x))(a)-1)

struct bitmap

{

    uint32_t    width;

    uint32_t    height;

    uint32_t    pitch;

    void       *buffer;

    uint32_t    size;

};

static uint32_t fd;

static struct pix_driver *driver;

static bitmap_t *sw_create_bitmap(uint32_t width, uint32_t height)

{

    bitmap_t *bitmap;

    bitmap = malloc(sizeof(bitmap_t));

    if(bitmap == NULL)

        goto err_0;

    bitmap->width  = width;

    bitmap->height = height;

    bitmap->pitch = ALIGN(width * 4, 16);

    bitmap->size = ALIGN(bitmap->pitch * height, 4096);

    bitmap->buffer = user_alloc(bitmap->size);

    if (bitmap->buffer == NULL)

        goto err_1;

//    printf("create bitmap: %p %dx%d buffer: %p\n",

//            bitmap, bitmap->width, bitmap->height, bitmap->buffer);

    return bitmap;

err_1:

    free(bitmap);

err_0:

    return NULL;

};

static int sw_destroy_bitmap(bitmap_t * bitmap)

{

    user_free(bitmap->buffer);

    free(bitmap);

    return 0;

};

static void *sw_lock_bitmap(bitmap_t *bitmap, uint32_t *pitch)

{

    *pitch = bitmap->pitch;

    return bitmap->buffer;

};

static int sw_resize_bitmap(bitmap_t * bitmap, uint32_t width, uint32_t height)

{

    uint32_t size;

    uint32_t pitch;

    pitch = ALIGN(width * 4, 16);

    size = ALIGN(pitch * height, 4096);

    if (size > bitmap->size)

    {

        bitmap->buffer = user_realloc(bitmap->buffer, size);    /* grow buffer */

        if (bitmap->buffer == NULL)

            return -1;

        bitmap->size = size;

    }

    else if (size < bitmap->size)

        user_unmap(bitmap->buffer, size, bitmap->size - size); /* unmap unused pages */

    bitmap->width  = width;

    bitmap->height = height;

    bitmap->pitch  = pitch;

    return 0;

};

static int sw_blit(bitmap_t * bitmap, int dst_x, int dst_y,

                   uint32_t w, uint32_t h, int src_x, int src_y)

{

    struct blit_call bc;

    int ret;

    bc.dstx     = dst_x;

    bc.dsty     = dst_y;

    bc.w        = w;

    bc.h        = h;

    bc.srcx     = src_x;

    bc.srcy     = src_y;

    bc.srcw     = bitmap->width;

    bc.srch     = bitmap->height;

    bc.stride   = bitmap->pitch;

    bc.bitmap   = bitmap->buffer;

    __asm__ __volatile__(

    "int $0x40":"=a"(ret):"a"(73), "b"(0x00),

    "c"(&bc):"memory");

    return ret;

};

static int sw_create_client(int x, int y, uint32_t width, uint32_t height)

{

    return 0;

};

static int sw_resize_client(int x, int y, uint32_t width, uint32_t height)

{

    return 0;

};

bitmap_t *pxCreateBitmap(uint32_t width, uint32_t height)

{

    return driver->create_bitmap(width, height);

};

int pxDestroyBitmap(bitmap_t *bitmap)

{

    return driver->destroy_bitmap(bitmap);

};

void *pxLockBitmap(bitmap_t *bitmap, uint32_t *pitch)

{

    return driver->lock_bitmap(bitmap, pitch);

};

int pxResizeBitmap(bitmap_t *bitmap, uint32_t width, uint32_t height)

{

    return driver->resize_bitmap(bitmap, width, height);

};

int pxBlitBitmap(bitmap_t *bitmap, int dst_x, int dst_y,

                uint32_t w, uint32_t h, int src_x, int src_y)

{

    return driver->blit_bitmap(bitmap, dst_x, dst_y,

                               w, h, src_x, src_y);

};

int pxCreateClient(int x, int y, uint32_t width, uint32_t height)

{

    return driver->create_client(x, y, width, height);

}

int pxResizeClient(int x, int y, uint32_t width, uint32_t height)

{

    return driver->resize_client(x, y, width, height);

}

static struct pix_driver sw_driver =

{

    0,

    sw_create_bitmap,

    sw_destroy_bitmap,

    sw_lock_bitmap,

    sw_resize_bitmap,

    sw_blit,

    sw_create_client,

    sw_resize_client,

    NULL

};

uint32_t pxInit(int hw)

{

    void *lib;

    struct pix_driver *(*drventry)(uint32_t service);

    uint32_t api_version;

    ioctl_t io;

    driver = &sw_driver;

    if(hw == 0)

        return 0;

    if (fd != 0)

        return driver->driver_caps;

    fd = get_service("DISPLAY");

    if (fd == 0)

        goto fail;

    io.handle = fd;

    io.io_code = SRV_GETVERSION;

    io.input = NULL;

    io.inp_size = 0;

    io.output = &api_version;

    io.out_size = BUFFER_SIZE(1);

    if (call_service(&io) != 0)

        goto fail;

    if ((DISPLAY_VERSION > (api_version & 0xFFFF)) ||

        (DISPLAY_VERSION < (api_version >> 16)))

        goto fail;

    lib = load_library("pixlib-gl.dll");

    if(lib == 0)

        goto fail;

    drventry = get_proc_address(lib, "DrvInit");

    if( drventry == NULL)

        goto fail;

    driver = drventry(fd);

    if(driver == NULL)

    {

        driver = &sw_driver;

        goto fail;

    };

    if (driver->driver_caps)

        printf("2D caps %s%s%s\n",

               (driver->driver_caps & HW_BIT_BLIT) != 0 ? "HW_BIT_BLIT " : "",

               (driver->driver_caps & HW_TEX_BLIT) != 0 ? "HW_TEX_BLIT " : "",

               (driver->driver_caps & HW_VID_BLIT) != 0 ? "HW_VID_BLIT " : "");

    return driver->driver_caps;

fail:

    printf("Warning! Hardware initialization failed.\n"

           "fallback to software rendering.\n");

    fd = 0;

    return 0;

};

void pxFini()

{

    if (driver->fini)

        driver->fini();

};