/* * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Hyra nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include /* * Draw a classic square onto the screen. * * @ctx: Graphics context * @shape: Square to draw */ static int gfx_draw_square(struct gfx_ctx *ctx, const struct gfx_shape *shape) { struct fbattr fbdev; off_t idx; scrpos_t scr_width, scr_height; scrpos_t x, y; if (ctx == NULL || shape == NULL) { return -EINVAL; } /* Grab screen dimensions */ fbdev = ctx->fbdev; scr_width = fbdev.width; scr_height = fbdev.height; for (x = shape->x; x < shape->x + shape->width; ++x) { for (y = shape->y; y < shape->y + shape->height; ++y) { if (x >= scr_width || y >= scr_height) { break; } idx = gfx_io_index(ctx, x, y); ctx->io[idx] = shape->color; } } return 0; } /* * Draw a shape onto the screen * * @ctx: libgfx graphics context * @shape: Shape to draw * * Returns 0 on success, otherwise a less than zero * value on failure. * * All error codes follow POSIX errno. However if the value * is -1, the requested shape to be drawn is not valid. */ int gfx_draw_shape(struct gfx_ctx *ctx, const struct gfx_shape *shape) { if (ctx == NULL || shape == NULL) { return -EINVAL; } switch (shape->type) { case SHAPE_SQUARE: return gfx_draw_square(ctx, shape); } return -1; }