ascension: test/snake.c@d8d2e4817db1

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  * Copyright 2023 Mike Becker. All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions are met:

     7  *

     8  *   1. Redistributions of source code must retain the above copyright

     9  *      notice, this list of conditions and the following disclaimer.

    10  *

    11  *   2. Redistributions in binary form must reproduce the above copyright

    12  *      notice, this list of conditions and the following disclaimer in the

    13  *      documentation and/or other materials provided with the distribution.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    16  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    18  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    19  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    20  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    21  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    24  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    25  * POSSIBILITY OF SUCH DAMAGE.

    26  */

    28 #include "ascension/core.h"

    29 #include <ascension/ui.h>

    31 #include <cx/printf.h>

    33 static void update_fps_counter(AscSceneNode *node) {

    34     static uint64_t last_fps = 0;

    35     static uint64_t debounce = ASC_NANOS_SECOND - 1;

    36     debounce += asc_context.frame_nanos;

    37     // only update text every seconds

    38     if (debounce >= ASC_NANOS_SECOND) {

    39         debounce = 0;

    40         uint64_t fps = ASC_NANOS_SECOND;

    41         fps /= asc_context.frame_nanos;

    42         if (fps != last_fps) {

    43             last_fps = fps;

    44             snprintf(asc_text_data(node)->text, 11, "%"PRIu64" FPS", fps);

    45             asc_node_update(node);

    46         }

    47     }

    48 }

    50 static void create_fps_counter(void) {

    51     asc_set_font(asc_font(ASC_FONT_REGULAR, 24));

    52     asc_ink_rgb(255, 0, 0);

    53     AscSceneNode* node = asc_text(10, 10, "XXXXXXX FPS");

    54     asc_scene_add_behavior(node, update_fps_counter);

    55     asc_scene_node_link(asc_window_active->ui, node);

    56 }

    58 static void update_score_counter(AscSceneNode *node) {

    59     // tie to bottom left of the screen

    60     if (asc_window_active->resized) {

    61         asc_vec2i bottom_left = asc_window_active->dimensions;

    62         asc_vec2i scale = asc_get_scale2d(node);

    63         asc_set_position2d(

    64                 node,

    65                 bottom_left.x - scale.width - 10,

    66                 bottom_left.y - scale.height - 10

    67         );

    68     }

    69 }

    71 static void create_score_counter(void) {

    72     asc_set_font(asc_font(ASC_FONT_BOLD, 14));

    73     asc_ink_rgb(0, 255, 0);

    74     AscSceneNode* node = asc_text(0, 0, "Score: 0");

    75     asc_scene_add_behavior(node, update_score_counter);

    76     asc_scene_node_link(asc_window_active->ui, node);

    77 }

    79 int main(int argc, char** argv) {

    80     asc_context_initialize();

    81     if (asc_has_error()) {

    82         SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,

    83                 "Fatal Error",asc_get_error(),NULL);

    84         return 1;

    85     }

    87     // create window

    88     AscWindowSettings settings;

    89     asc_window_settings_init_defaults(&settings);

    90     settings.title = "Snake";

    91     AscWindow *window = asc_window_initialize(0, &settings);

    93     // create UI elements

    94     create_fps_counter();

    95     create_score_counter();

    98     // Main Loop

    99     do {

   100         // quit application on any error

   101         if (asc_has_error()) {

   102             SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,

   103                     "Fatal Error", asc_get_error(), window->window);

   104             asc_clear_error();

   105             break;

   106         }

   107     } while (asc_loop_next());

   109     asc_context_destroy();

   110     return 0;

   111 }

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