cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_drawpoint.c (3110B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
      4
      5  This software is provided 'as-is', without any express or implied
      6  warranty.  In no event will the authors be held liable for any damages
      7  arising from the use of this software.
      8
      9  Permission is granted to anyone to use this software for any purpose,
     10  including commercial applications, and to alter it and redistribute it
     11  freely, subject to the following restrictions:
     12
     13  1. The origin of this software must not be misrepresented; you must not
     14     claim that you wrote the original software. If you use this software
     15     in a product, an acknowledgment in the product documentation would be
     16     appreciated but is not required.
     17  2. Altered source versions must be plainly marked as such, and must not be
     18     misrepresented as being the original software.
     19  3. This notice may not be removed or altered from any source distribution.
     20*/
     21#include "../../SDL_internal.h"
     22
     23#if !SDL_RENDER_DISABLED
     24
     25#include "SDL_draw.h"
     26#include "SDL_drawpoint.h"
     27
     28
     29int
     30SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color)
     31{
     32    if (!dst) {
     33        return SDL_SetError("Passed NULL destination surface");
     34    }
     35
     36    /* This function doesn't work on surfaces < 8 bpp */
     37    if (dst->format->BitsPerPixel < 8) {
     38        return SDL_SetError("SDL_DrawPoint(): Unsupported surface format");
     39    }
     40
     41    /* Perform clipping */
     42    if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
     43        x >= (dst->clip_rect.x + dst->clip_rect.w) ||
     44        y >= (dst->clip_rect.y + dst->clip_rect.h)) {
     45        return 0;
     46    }
     47
     48    switch (dst->format->BytesPerPixel) {
     49    case 1:
     50        DRAW_FASTSETPIXELXY1(x, y);
     51        break;
     52    case 2:
     53        DRAW_FASTSETPIXELXY2(x, y);
     54        break;
     55    case 3:
     56        return SDL_Unsupported();
     57    case 4:
     58        DRAW_FASTSETPIXELXY4(x, y);
     59        break;
     60    }
     61    return 0;
     62}
     63
     64int
     65SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count,
     66               Uint32 color)
     67{
     68    int minx, miny;
     69    int maxx, maxy;
     70    int i;
     71    int x, y;
     72
     73    if (!dst) {
     74        return SDL_SetError("Passed NULL destination surface");
     75    }
     76
     77    /* This function doesn't work on surfaces < 8 bpp */
     78    if (dst->format->BitsPerPixel < 8) {
     79        return SDL_SetError("SDL_DrawPoints(): Unsupported surface format");
     80    }
     81
     82    minx = dst->clip_rect.x;
     83    maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
     84    miny = dst->clip_rect.y;
     85    maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
     86
     87    for (i = 0; i < count; ++i) {
     88        x = points[i].x;
     89        y = points[i].y;
     90
     91        if (x < minx || x > maxx || y < miny || y > maxy) {
     92            continue;
     93        }
     94
     95        switch (dst->format->BytesPerPixel) {
     96        case 1:
     97            DRAW_FASTSETPIXELXY1(x, y);
     98            break;
     99        case 2:
    100            DRAW_FASTSETPIXELXY2(x, y);
    101            break;
    102        case 3:
    103            return SDL_Unsupported();
    104        case 4:
    105            DRAW_FASTSETPIXELXY4(x, y);
    106            break;
    107        }
    108    }
    109    return 0;
    110}
    111
    112#endif /* !SDL_RENDER_DISABLED */
    113
    114/* vi: set ts=4 sw=4 expandtab: */