Function RenderDrawLinesWithRectsF

deps/SDL2/src/render/SDL_render.c:2500–2553

}

static int
RenderDrawLinesWithRectsF(SDL_Renderer * renderer,
                          const SDL_FPoint * points, const int count)
{
    SDL_FRect *frect;
    SDL_FRect *frects;
    SDL_FPoint fpoints[2];
    int i, nrects = 0;
    int retval = 0;
    SDL_bool isstack;

    frects = SDL_small_alloc(SDL_FRect, count-1, &isstack);
    if (!frects) {
        return SDL_OutOfMemory();
    }

    for (i = 0; i < count-1; ++i) {
        if (points[i].x == points[i+1].x) {
            const int minY = (int)SDL_min(points[i].y, points[i+1].y);
            const int maxY = (int)SDL_max(points[i].y, points[i+1].y);

            frect = &frects[nrects++];
            frect->x = points[i].x * renderer->scale.x;
            frect->y = minY * renderer->scale.y;
            frect->w = renderer->scale.x;
            frect->h = (maxY - minY + 1) * renderer->scale.y;
        } else if (points[i].y == points[i+1].y) {
            const int minX = (int)SDL_min(points[i].x, points[i+1].x);
            const int maxX = (int)SDL_max(points[i].x, points[i+1].x);

            frect = &frects[nrects++];
            frect->x = minX * renderer->scale.x;
            frect->y = points[i].y * renderer->scale.y;
            frect->w = (maxX - minX + 1) * renderer->scale.x;
            frect->h = renderer->scale.y;
        } else {
            /* FIXME: We can't use a rect for this line... */
            fpoints[0].x = points[i].x * renderer->scale.x;
            fpoints[0].y = points[i].y * renderer->scale.y;
            fpoints[1].x = points[i+1].x * renderer->scale.x;
            fpoints[1].y = points[i+1].y * renderer->scale.y;
            retval += QueueCmdDrawLines(renderer, fpoints, 2);
        }
    }

    retval += QueueCmdFillRects(renderer, frects, nrects);

    SDL_small_free(frects, isstack);

    if (retval < 0) {
        retval = -1;
    }
    return retval < 0 ? retval : FlushRenderCommandsIfNotBatching(renderer);
}

int
SDL_RenderDrawLines(SDL_Renderer * renderer,