/*

    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

*/

#include "SDL_config.h"

#include "SDL_draw.h"

int

SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color)

{

    if (!dst) {

        SDL_SetError("Passed NULL destination surface");

        return -1;

    }

    /* This function doesn't work on surfaces < 8 bpp */

    if (dst->format->BitsPerPixel < 8) {

        SDL_SetError("SDL_DrawPoint(): Unsupported surface format");

        return -1;

    }

    /* Perform clipping */

    if (x < dst->clip_rect.x || y < dst->clip_rect.y ||

        x >= (dst->clip_rect.x + dst->clip_rect.w) ||

        y >= (dst->clip_rect.y + dst->clip_rect.h)) {

        return 0;

    }

    switch (dst->format->BytesPerPixel) {

    case 1:

        DRAW_FASTSETPIXELXY1(x, y);

        break;

    case 2:

        DRAW_FASTSETPIXELXY2(x, y);

        break;

    case 3:

        SDL_Unsupported();

        return -1;

    case 4:

        DRAW_FASTSETPIXELXY4(x, y);

        break;

    }

    return 0;

}

int

SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count,

               Uint32 color)

{

    int minx, miny;

    int maxx, maxy;

    int i;

    int x, y;

    if (!dst) {

        SDL_SetError("Passed NULL destination surface");

        return -1;

    }

    /* This function doesn't work on surfaces < 8 bpp */

    if (dst->format->BitsPerPixel < 8) {

        SDL_SetError("SDL_DrawPoints(): Unsupported surface format");

        return -1;

    }

    minx = dst->clip_rect.x;

    maxx = dst->clip_rect.x + dst->clip_rect.w - 1;

    miny = dst->clip_rect.y;

    maxy = dst->clip_rect.y + dst->clip_rect.h - 1;

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

        x = points[i].x;

        y = points[i].y;

        if (x < minx || x > maxx || y < miny || y > maxy) {

            continue;

        }

        switch (dst->format->BytesPerPixel) {

        case 1:

            DRAW_FASTSETPIXELXY1(x, y);

            break;

        case 2:

            DRAW_FASTSETPIXELXY2(x, y);

            break;

        case 3:

            SDL_Unsupported();

            return -1;

        case 4:

            DRAW_FASTSETPIXELXY4(x, y);

            break;

        }

    }

    return 0;

}

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