/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

#include "SDL_video.h"

#include "../SDL_sysvideo.h"

#include "../SDL_yuv_sw_c.h"

/* SDL surface based renderer implementation */

static int SDL_DUMMY_CreateTexture(SDL_Renderer * renderer,

static int SDL_DUMMY_QueryTexturePixels(SDL_Renderer * renderer,

static int SDL_DUMMY_SetTexturePalette(SDL_Renderer * renderer,

static int SDL_DUMMY_GetTexturePalette(SDL_Renderer * renderer,

static int SDL_DUMMY_UpdateTexture(SDL_Renderer * renderer,

static void SDL_DUMMY_UnlockTexture(SDL_Renderer * renderer,

static void SDL_DUMMY_DirtyTexture(SDL_Renderer * renderer,

static void SDL_DUMMY_SelectRenderTexture(SDL_Renderer * renderer,

static int SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer,

static int SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer,

static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);

static void SDL_DUMMY_DestroyTexture(SDL_Renderer * renderer,

static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);

SDL_RenderDriver SDL_DUMMY_RenderDriver = {

    SDL_DUMMY_CreateRenderer,

    {

     "dummy",

     (SDL_Renderer_SingleBuffer | SDL_Renderer_PresentCopy |

      SDL_Renderer_PresentFlip2 | SDL_Renderer_PresentFlip3 |

      SDL_Renderer_PresentDiscard),

     (SDL_TextureBlendMode_None | SDL_TextureBlendMode_Mask |

      SDL_TextureBlendMode_Blend),

     (SDL_TextureScaleMode_None | SDL_TextureScaleMode_Fast),

     11,

     {

      SDL_PixelFormat_Index8,

      SDL_PixelFormat_RGB555,

      SDL_PixelFormat_RGB565,

      SDL_PixelFormat_RGB888,

      SDL_PixelFormat_BGR888,

      SDL_PixelFormat_ARGB8888,

      SDL_PixelFormat_RGBA8888,

      SDL_PixelFormat_ABGR8888,

      SDL_PixelFormat_BGRA8888,

      SDL_PixelFormat_YUY2,

      SDL_PixelFormat_UYVY},

     0,

     0}

};

typedef struct

{

    int current_screen;

    SDL_Surface *screens[3];

} SDL_DUMMY_RenderData;

SDL_Renderer *

SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)

{

    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);

    SDL_DisplayMode *displayMode = &display->current_mode;

    SDL_Renderer *renderer;

    SDL_DUMMY_RenderData *data;

    int i, n;

    int bpp;

    Uint32 Rmask, Gmask, Bmask, Amask;

    if (!SDL_PixelFormatEnumToMasks

        (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {

        SDL_SetError("Unknown display format");

        return NULL;

    }

    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));

    if (!renderer) {

        SDL_OutOfMemory();

        return NULL;

    }

    data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));

    if (!data) {

        SDL_DUMMY_DestroyRenderer(renderer);

        SDL_OutOfMemory();

        return NULL;

    }

    SDL_zerop(data);

    renderer->CreateTexture = SDL_DUMMY_CreateTexture;

    renderer->QueryTexturePixels = SDL_DUMMY_QueryTexturePixels;

    renderer->SetTexturePalette = SDL_DUMMY_SetTexturePalette;

    renderer->GetTexturePalette = SDL_DUMMY_GetTexturePalette;

    renderer->UpdateTexture = SDL_DUMMY_UpdateTexture;

    renderer->LockTexture = SDL_DUMMY_LockTexture;

    renderer->UnlockTexture = SDL_DUMMY_UnlockTexture;

    renderer->DirtyTexture = SDL_DUMMY_DirtyTexture;

    renderer->RenderFill = SDL_DUMMY_RenderFill;

    renderer->RenderCopy = SDL_DUMMY_RenderCopy;

    renderer->RenderPresent = SDL_DUMMY_RenderPresent;

    renderer->DestroyTexture = SDL_DUMMY_DestroyTexture;

    renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;

    renderer->info = SDL_DUMMY_RenderDriver.info;

    renderer->window = window->id;

    renderer->driverdata = data;

    renderer->info.flags = 0;

    if (flags & SDL_Renderer_PresentFlip2) {

        renderer->info.flags |= SDL_Renderer_PresentFlip2;

        n = 2;

    } else if (flags & SDL_Renderer_PresentFlip3) {

        renderer->info.flags |= SDL_Renderer_PresentFlip3;

        n = 3;

    } else {

        renderer->info.flags |= SDL_Renderer_PresentCopy;

        n = 1;

    }

    for (i = 0; i < n; ++i) {

        data->screens[i] =

            SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,

                                 Bmask, Amask);

        if (!data->screens[i]) {

            SDL_DUMMY_DestroyRenderer(renderer);

            return NULL;

        }

        SDL_SetSurfacePalette(data->screens[i], display->palette);

    }

    data->current_screen = 0;

    return renderer;

}

static int

SDL_DUMMY_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        texture->driverdata = SDL_SW_CreateYUVTexture(texture);

    } else {

        int bpp;

        Uint32 Rmask, Gmask, Bmask, Amask;

        if (!SDL_PixelFormatEnumToMasks

            (texture->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {

            SDL_SetError("Unknown texture format");

            return -1;

        }

    }

    if (!texture->driverdata) {

        return -1;

    }

    return 0;

}

static int

SDL_DUMMY_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

    } else {

        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;

        *pixels = surface->pixels;

        *pitch = surface->pitch;

        return 0;

    }

}

static int

SDL_DUMMY_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        SDL_SetError("YUV textures don't have a palette");

        return -1;

    } else {

        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;

        return SDL_SetPaletteColors(surface->format->palette, colors,

                                    firstcolor, ncolors);

    }

}

static int

SDL_DUMMY_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        SDL_SetError("YUV textures don't have a palette");

        return -1;

    } else {

        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;

        SDL_memcpy(colors, &surface->format->palette->colors[firstcolor],

                   ncolors * sizeof(*colors));

        return 0;

    }

}

static int

SDL_DUMMY_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        return SDL_SW_UpdateYUVTexture((SDL_SW_YUVTexture *) texture->

                                       driverdata, rect, pixels, pitch);

    } else {

        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;

        Uint8 *src, *dst;

        int row;

        size_t length;

        src = (Uint8 *) pixels;

        dst =

            (Uint8 *) surface->pixels + rect->y * surface->pitch +

            rect->x * surface->format->BytesPerPixel;

        length = rect->w * surface->format->BytesPerPixel;

        for (row = 0; row < rect->h; ++row) {

            SDL_memcpy(dst, src, length);

            src += pitch;

            dst += surface->pitch;

        }

        return 0;

    }

}

static int

SDL_DUMMY_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        return SDL_SW_LockYUVTexture((SDL_SW_YUVTexture *) texture->

                                     driverdata, rect, markDirty, pixels,

                                     pitch);

    } else {

        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;

        *pixels =

            (void *) ((Uint8 *) surface->pixels + rect->y * surface->pitch +

                      rect->x * surface->format->BytesPerPixel);

        *pitch = surface->pitch;

        return 0;

    }

}

static void

SDL_DUMMY_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        SDL_SW_UnlockYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);

    }

}

static void

SDL_DUMMY_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,

{

}

static int

SDL_DUMMY_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,

{

    SDL_Surface *target = data->screens[data->current_screen];

    SDL_Rect real_rect = *rect;

    Uint8 r, g, b, a;

    a = (Uint8) ((color >> 24) & 0xFF);

    r = (Uint8) ((color >> 16) & 0xFF);

    g = (Uint8) ((color >> 8) & 0xFF);

    b = (Uint8) (color & 0xFF);

    color = SDL_MapRGBA(target->format, r, g, b, a);

    return SDL_FillRect(target, &real_rect, color);

}

static int

SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,

{

    SDL_Window *window = SDL_GetWindowFromID(renderer->window);

    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        SDL_Surface *target = data->screens[data->current_screen];

        void *pixels =

            (Uint8 *) target->pixels + dstrect->y * target->pitch +

            dstrect->x * target->format->BytesPerPixel;

        return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,

                                   srcrect, display->current_mode.format,

                                   dstrect->w, dstrect->h, pixels,

                                   target->pitch);

    } else {

        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;

        SDL_Surface *target = data->screens[data->current_screen];

        SDL_Rect real_srcrect = *srcrect;

        SDL_Rect real_dstrect = *dstrect;

        if (blendMode &

            (SDL_TextureBlendMode_Mask | SDL_TextureBlendMode_Blend)) {

            SDL_SetAlpha(surface, SDL_SRCALPHA, 0);

        } else {

            SDL_SetAlpha(surface, 0, 0);

        }

        if (scaleMode != SDL_TextureScaleMode_None &&

            (srcrect->w != dstrect->w || srcrect->h != dstrect->h)) {

        } else {

        }

    }

}

static void

SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)

{

    static int frame_number;

    /* Send the data to the display */

    if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {

        char file[128];

        SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",

                     renderer->window, ++frame_number);

        SDL_SaveBMP(data->screens[data->current_screen], file);

    }

    /* Update the flipping chain, if any */

    if (renderer->info.flags & SDL_Renderer_PresentFlip2) {

        data->current_screen = (data->current_screen + 1) % 2;

    } else if (renderer->info.flags & SDL_Renderer_PresentFlip3) {

        data->current_screen = (data->current_screen + 1) % 3;

    }

}

static void

SDL_DUMMY_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)

{

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {

        SDL_SW_DestroyYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);

    } else {

        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;

        SDL_FreeSurface(surface);

    }

}

static void

SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)

{

    int i;

    if (data) {

        for (i = 0; i < SDL_arraysize(data->screens); ++i) {

            if (data->screens[i]) {

                SDL_FreeSurface(data->screens[i]);

            }

        }

        SDL_free(data);

    }

    SDL_free(renderer);

}

/* vi: set ts=4 sw=4 expandtab: */