ascension: src/context.c@139dac8ef9ee

     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/context.h"

    29 #include "ascension/error.h"

    30 #include "ascension/utils.h"

    31 #include "ascension/shader.h"

    33 #include <cx/linked_list.h>

    35 #include <SDL2/SDL.h>

    36 #include <SDL2/SDL_ttf.h>

    38 AscContext asc_context;

    40 void asc_context_initialize(void) {

    41     if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED))

    42         return;

    43     memset(&asc_context, 0, sizeof(AscContext));

    45     // initialize error buffer

    46     cxBufferInit(

    47             &asc_context.error_buffer,

    48             NULL,

    49             256,

    50             NULL,

    51             CX_BUFFER_AUTO_EXTEND

    52     );

    54     // initialize SDL

    55     if (SDL_Init(SDL_INIT_VIDEO) < 0) {

    56         asc_error(SDL_GetError());

    57     } else {

    58         if (TTF_Init() < 0) {

    59             asc_error(TTF_GetError());

    60         }

    61     }

    62     SDL_ClearError();

    63     asc_set_flag(&asc_context.flags, ASC_FLAG_INITILIZED);

    64     asc_dprintf("Ascension context initialized.");

    65 }

    67 void asc_context_destroy(void) {

    68     asc_shader_destroy_predefined();

    69     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {

    70         asc_window_destroy(&asc_context.windows[i]);

    71     }

    72     asc_font_cache_clear();

    74     // quit SDL

    75     if (TTF_WasInit())

    76         TTF_Quit();

    77     SDL_Quit();

    79     // destroy the error buffer

    80     cxBufferDestroy(&asc_context.error_buffer);

    81     asc_context.flags = 0;

    82     asc_dprintf("Ascension context destroyed.");

    83 }

    85 static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {

    86     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {

    87         if (asc_context.windows[i].id == id) {

    88             asc_context.windows[i].dimensions.width = width;

    89             asc_context.windows[i].dimensions.height = height;

    90             asc_mat4f_ortho(asc_context.windows[i].projection, 0, (float) width, (float) height, 0);

    91             return;

    92         }

    93     }

    94 }

    96 bool asc_loop_next(void) {

    97     // dispatch SDL events

    98     SDL_Event event;

    99     while (SDL_PollEvent(&event)) {

   100         switch (event.type) {

   101             case SDL_QUIT:

   102                 asc_set_flag(&asc_context.flags, ASC_FLAG_QUIT);

   103                 break;

   104             case SDL_WINDOWEVENT: {

   105                 if (event.window.event == SDL_WINDOWEVENT_RESIZED)

   106                     asc_event_window_resized(

   107                             event.window.windowID,

   108                             event.window.data1,

   109                             event.window.data2

   110                     );

   111                 break;

   112             }

   113             case SDL_KEYDOWN:

   114                 // TODO: remove this code and implement key press map instead

   115                 if (event.key.keysym.sym == SDLK_ESCAPE)

   116                     return false;

   117                 break;

   118             case SDL_KEYUP:

   119                 // TODO: implement key press map

   120                 break;

   121         }

   122     }

   124     // sync the windows

   125     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {

   126         if (asc_context.windows[i].id > 0) {

   127             asc_window_sync(&asc_context.windows[i]);

   128         }

   129     }

   131     // compute frame time

   132     static Uint32 ticks;

   133     Uint32 ticks_elapsed = SDL_GetTicks() - ticks;

   134     ticks = SDL_GetTicks();

   135     asc_context.elapsed_millis = ticks_elapsed;

   136     asc_context.elapsed = (float) ticks_elapsed / 1000.0f;

   138     return !asc_test_flag(asc_context.flags, ASC_FLAG_QUIT);

   139 }

Mercurial > hg > ascension / file revision