/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 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

    QNX Graphics Framework SDL driver
    Copyright (C) 2009 Mike Gorchak
    (mike@malva.ua, lestat@i.com.ua)
*/

#include "SDL_config.h"

#include "../SDL_pixels_c.h"
#include "../SDL_yuv_sw_c.h"

#include "SDL_video.h"

#include "SDL_gf_render.h"
#include "SDL_qnxgf.h"

static SDL_Renderer *gf_createrenderer(SDL_Window * window, Uint32 flags);
static int gf_displaymodechanged(SDL_Renderer * renderer);
static int gf_activaterenderer(SDL_Renderer * renderer);
static int gf_createtexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int gf_querytexturepixels(SDL_Renderer * renderer,
                                 SDL_Texture * texture, void **pixels,
                                 int *pitch);
static int gf_settexturepalette(SDL_Renderer * renderer,
                                SDL_Texture * texture,
                                const SDL_Color * colors, int firstcolor,
                                int ncolors);
static int gf_gettexturepalette(SDL_Renderer * renderer,
                                SDL_Texture * texture, SDL_Color * colors,
                                int firstcolor, int ncolors);
static int gf_settexturecolormod(SDL_Renderer * renderer,
                                 SDL_Texture * texture);
static int gf_settexturealphamod(SDL_Renderer * renderer,
                                 SDL_Texture * texture);
static int gf_settextureblendmode(SDL_Renderer * renderer,
                                  SDL_Texture * texture);
static int gf_settexturescalemode(SDL_Renderer * renderer,
                                  SDL_Texture * texture);
static int gf_updatetexture(SDL_Renderer * renderer, SDL_Texture * texture,
                            const SDL_Rect * rect, const void *pixels,
                            int pitch);
static int gf_locktexture(SDL_Renderer * renderer, SDL_Texture * texture,
                          const SDL_Rect * rect, int markDirty, void **pixels,
                          int *pitch);
static void gf_unlocktexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void gf_dirtytexture(SDL_Renderer * renderer, SDL_Texture * texture,
                            int numrects, const SDL_Rect * rects);
static int gf_renderpoint(SDL_Renderer * renderer, int x, int y);
static int gf_renderline(SDL_Renderer * renderer, int x1, int y1, int x2,
                         int y2);
static int gf_renderfill(SDL_Renderer * renderer, const SDL_Rect * rect);
static int gf_rendercopy(SDL_Renderer * renderer, SDL_Texture * texture,
                         const SDL_Rect * srcrect, const SDL_Rect * dstrect);
static void gf_renderpresent(SDL_Renderer * renderer);
static void gf_destroytexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void gf_destroyrenderer(SDL_Renderer * renderer);

SDL_RenderDriver gf_renderdriver = {
    gf_createrenderer,
    {
     "qnxgf",
     (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
      SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
      SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_PRESENTDISCARD |
      SDL_RENDERER_ACCELERATED),
     (SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_COLOR |
      SDL_TEXTUREMODULATE_ALPHA),
     (SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK |
      SDL_BLENDMODE_BLEND | SDL_BLENDMODE_ADD | SDL_BLENDMODE_MOD),
     (SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_SLOW),
     13,
     {
      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_YV12,
      SDL_PIXELFORMAT_YUY2,
      SDL_PIXELFORMAT_UYVY,
      SDL_PIXELFORMAT_YVYU},
     0,
     0}
};

static SDL_Renderer *
gf_createrenderer(SDL_Window * window, Uint32 flags)
{
    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
    SDL_DisplayData *didata = (SDL_DisplayData *) display->driverdata;
    SDL_WindowData *wdata = (SDL_WindowData *) window->driverdata;
    SDL_Renderer *renderer = NULL;
    SDL_RenderData *rdata = NULL;
    uint32_t it;
    int32_t jt;
    int32_t status;

    /* Check if it is OpenGL ES window */
    if ((window->flags & SDL_WINDOW_OPENGL) == SDL_WINDOW_OPENGL) {
        /* No error, just no need to create 2D renderer for OpenGL ES window */
        return NULL;
    }

    /* Allocate new renderer structure */
    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(SDL_Renderer));
    if (renderer == NULL) {
        SDL_OutOfMemory();
        return NULL;
    }

    /* Allocate renderer data */
    rdata = (SDL_RenderData *) SDL_calloc(1, sizeof(SDL_RenderData));
    if (rdata == NULL) {
        SDL_free(renderer);
        SDL_OutOfMemory();
        return NULL;
    }

    renderer->DisplayModeChanged = gf_displaymodechanged;
    renderer->ActivateRenderer = gf_activaterenderer;
    renderer->CreateTexture = gf_createtexture;
    renderer->QueryTexturePixels = gf_querytexturepixels;
    renderer->SetTexturePalette = gf_settexturepalette;
    renderer->GetTexturePalette = gf_gettexturepalette;
    renderer->SetTextureAlphaMod = gf_settexturealphamod;
    renderer->SetTextureColorMod = gf_settexturecolormod;
    renderer->SetTextureBlendMode = gf_settextureblendmode;
    renderer->SetTextureScaleMode = gf_settexturescalemode;
    renderer->UpdateTexture = gf_updatetexture;
    renderer->LockTexture = gf_locktexture;
    renderer->UnlockTexture = gf_unlocktexture;
    renderer->DirtyTexture = gf_dirtytexture;
    renderer->RenderPoint = gf_renderpoint;
    renderer->RenderLine = gf_renderline;
    renderer->RenderFill = gf_renderfill;
    renderer->RenderCopy = gf_rendercopy;
    renderer->RenderPresent = gf_renderpresent;
    renderer->DestroyTexture = gf_destroytexture;
    renderer->DestroyRenderer = gf_destroyrenderer;
    renderer->info = gf_renderdriver.info;
    renderer->window = window->id;
    renderer->driverdata = rdata;

    /* Set render acceleration flag in case it is accelerated */
    if ((didata->caps & SDL_GF_ACCELERATED) == SDL_GF_ACCELERATED) {
        renderer->info.flags = SDL_RENDERER_ACCELERATED;
    } else {
        renderer->info.flags &= ~(SDL_RENDERER_ACCELERATED);
    }

    rdata->window = window;

    /* Check if upper level requested synchronization on vsync signal */
    if ((flags & SDL_RENDERER_PRESENTVSYNC) == SDL_RENDERER_PRESENTVSYNC) {
        rdata->enable_vsync = SDL_TRUE;
    } else {
        rdata->enable_vsync = SDL_FALSE;
    }

    /* Check what buffer copy/flip scheme is requested */
    rdata->surfaces_count = 0;
    if ((flags & SDL_RENDERER_SINGLEBUFFER) == SDL_RENDERER_SINGLEBUFFER) {
        if ((flags & SDL_RENDERER_PRESENTDISCARD) ==
            SDL_RENDERER_PRESENTDISCARD) {
            renderer->info.flags |=
                SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD;
        } else {
            renderer->info.flags |=
                SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY;
        }
        rdata->surfaces_count = 1;
        rdata->surface_visible_idx = 0;
        rdata->surface_render_idx = 0;
    } else {
        if ((flags & SDL_RENDERER_PRESENTFLIP2) == SDL_RENDERER_PRESENTFLIP2) {
            renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
            rdata->surfaces_count = 2;
            rdata->surface_visible_idx = 0;
            rdata->surface_render_idx = 1;
        } else {
            if ((flags & SDL_RENDERER_PRESENTFLIP3) ==
                SDL_RENDERER_PRESENTFLIP3) {
                renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
                rdata->surfaces_count = 3;
                rdata->surface_visible_idx = 0;
                rdata->surface_render_idx = 1;
            } else {
                renderer->info.flags |=
                    SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY;
                rdata->surfaces_count = 1;
                rdata->surface_visible_idx = 0;
                rdata->surface_render_idx = 0;
            }
        }
    }

    /* Create layer surfaces, which could be visible */
    for (it = 0; it < rdata->surfaces_count; it++) {
        /* TODO: add palette creation */

        /* Create displayable surfaces */
        status =
            gf_surface_create_layer(&rdata->surface[it], &didata->layer, 1, 0,
                                    didata->current_mode.w,
                                    didata->current_mode.h,
                                    qnxgf_sdl_to_gf_pixelformat(didata->
                                                                current_mode.
                                                                format), NULL,
                                    GF_SURFACE_CREATE_2D_ACCESSIBLE);

        if (status != GF_ERR_OK) {
            /* Free already allocated surfaces */
            for (jt = it - 1; jt > 0; jt--) {
                gf_surface_free(rdata->surface[jt]);
                rdata->surface[jt] = NULL;
            }
            SDL_free(rdata);
            SDL_free(renderer);
            if (status == GF_ERR_MEM) {
                SDL_SetError("unsufficient free video memory");
            } else {
                SDL_SetError("error during displayable surface creation");
            }
            return NULL;
        }

        /* Get detailed information about allocated surface */
        gf_surface_get_info(rdata->surface[it], &rdata->surface_info[it]);
    }

    return renderer;
}

void
gf_addrenderdriver(_THIS)
{
    uint32_t it;

    for (it = 0; it < _this->num_displays; it++) {
        SDL_AddRenderDriver(it, &gf_renderdriver);
    }
}

/****************************************************************************/
/* SDL render interface                                                     */
/****************************************************************************/
static int
gf_displaymodechanged(SDL_Renderer * renderer)
{
    SDL_RenderData *rdata = (SDL_RenderData *) renderer->driverdata;

    /* Remove all allocated surfaces, they are no more valid */

    /* TODO: Add video mode change detection and new parameters detection */

    return 0;
}

static int
gf_activaterenderer(SDL_Renderer * renderer)
{
    SDL_RenderData *rdata = (SDL_RenderData *) renderer->driverdata;
    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(rdata->window);
    SDL_DisplayData *didata = (SDL_DisplayData *) display->driverdata;

    /* Setup current surface as visible */
//   gf_layer_set_surfaces(didata->layer, &rdata->surface[rdata->surface_visible_idx], 1);

    /* Set visible surface when hardware in idle state */
//   gf_layer_update(didata->layer, GF_LAYER_UPDATE_NO_WAIT_IDLE);

    return 0;
}

static int
gf_createtexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    SDL_RenderData *renderdata = (SDL_RenderData *) renderer->driverdata;
    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
    SDL_TextureData *tdata = NULL;

    /* Allocate texture driver data */
    tdata = (SDL_TextureData *) SDL_calloc(1, sizeof(SDL_TextureData));
    if (tdata == NULL) {
        SDL_OutOfMemory();
        return -1;
    }

    /* Set texture driver data */
    texture->driverdata = tdata;

}

static int
gf_querytexturepixels(SDL_Renderer * renderer, SDL_Texture * texture,
                      void **pixels, int *pitch)
{
}

static int
gf_settexturepalette(SDL_Renderer * renderer, SDL_Texture * texture,
                     const SDL_Color * colors, int firstcolor, int ncolors)
{
}

static int
gf_gettexturepalette(SDL_Renderer * renderer, SDL_Texture * texture,
                     SDL_Color * colors, int firstcolor, int ncolors)
{
}

static int
gf_settexturecolormod(SDL_Renderer * renderer, SDL_Texture * texture)
{
}

static int
gf_settexturealphamod(SDL_Renderer * renderer, SDL_Texture * texture)
{
}

static int
gf_settextureblendmode(SDL_Renderer * renderer, SDL_Texture * texture)
{
}

static int
gf_settexturescalemode(SDL_Renderer * renderer, SDL_Texture * texture)
{
}

static int
gf_updatetexture(SDL_Renderer * renderer, SDL_Texture * texture,
                 const SDL_Rect * rect, const void *pixels, int pitch)
{
}

static int
gf_locktexture(SDL_Renderer * renderer, SDL_Texture * texture,
               const SDL_Rect * rect, int markDirty, void **pixels,
               int *pitch)
{
}

static void
gf_unlocktexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
}

static void
gf_dirtytexture(SDL_Renderer * renderer, SDL_Texture * texture, int numrects,
                const SDL_Rect * rects)
{
}

static int
gf_renderpoint(SDL_Renderer * renderer, int x, int y)
{
}

static int
gf_renderline(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
{
}

static int
gf_renderfill(SDL_Renderer * renderer, const SDL_Rect * rect)
{
}

static int
gf_rendercopy(SDL_Renderer * renderer, SDL_Texture * texture,
              const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
}

static void
gf_renderpresent(SDL_Renderer * renderer)
{
}

static void
gf_destroytexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
}

static void
gf_destroyrenderer(SDL_Renderer * renderer)
{
    SDL_RenderData *rdata = (SDL_RenderData *) renderer->driverdata;
    uint32_t it;

    for (it = 0; it < rdata->surfaces_count; it++) {
        if (rdata->surface[it] != NULL) {
            gf_surface_free(rdata->surface[it]);
        }
    }
}

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