Thu, 28 Mar 2024 23:30:21 +0100
simplify how transforms work
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 <SDL2/SDL.h>
34 #include <SDL2/SDL_ttf.h>
36 AscContext asc_context;
38 void asc_context_initialize(void) {
39 if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED))
40 return;
41 memset(&asc_context, 0, sizeof(AscContext));
43 // initialize error buffer
44 cxBufferInit(
45 &asc_context.error_buffer,
46 NULL,
47 256,
48 NULL,
49 CX_BUFFER_AUTO_EXTEND
50 );
52 // initialize SDL
53 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
54 asc_error(SDL_GetError());
55 } else {
56 if (TTF_Init() < 0) {
57 asc_error(TTF_GetError());
58 }
59 }
60 SDL_ClearError();
61 asc_set_flag(&asc_context.flags, ASC_FLAG_INITILIZED);
62 asc_dprintf("Ascension context initialized.");
63 }
65 void asc_context_destroy(void) {
66 for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
67 asc_window_destroy(&asc_context.windows[i]);
68 }
69 asc_font_cache_clear();
71 // quit SDL
72 if (TTF_WasInit())
73 TTF_Quit();
74 SDL_Quit();
76 // destroy the error buffer
77 cxBufferDestroy(&asc_context.error_buffer);
78 asc_context.flags = 0;
79 asc_dprintf("Ascension context destroyed.");
80 }
82 static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {
83 for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
84 if (asc_context.windows[i].id == id) {
85 asc_vec2i dimensions = (asc_vec2i) {width, height};
86 asc_context.windows[i].resized = true;
87 asc_context.windows[i].dimensions = dimensions;
88 asc_context.windows[i].ui.viewport.size = dimensions;
89 asc_context.windows[i].ui.cameras[0].rect.size = dimensions;
90 return;
91 }
92 }
93 }
95 bool asc_loop_next(void) {
96 // dispatch SDL events
97 SDL_Event event;
98 while (SDL_PollEvent(&event)) {
99 switch (event.type) {
100 case SDL_QUIT:
101 asc_set_flag(&asc_context.flags, ASC_FLAG_QUIT);
102 break;
103 case SDL_WINDOWEVENT: {
104 if (event.window.event == SDL_WINDOWEVENT_RESIZED)
105 asc_event_window_resized(
106 event.window.windowID,
107 event.window.data1,
108 event.window.data2
109 );
110 break;
111 }
112 case SDL_KEYDOWN:
113 // TODO: remove this code and implement key press map instead
114 if (event.key.keysym.sym == SDLK_ESCAPE)
115 return false;
116 break;
117 case SDL_KEYUP:
118 // TODO: implement key press map
119 break;
120 }
121 }
123 // sync the windows
124 for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
125 if (asc_context.windows[i].id > 0) {
126 asc_window_sync(&asc_context.windows[i]);
127 }
128 }
130 // compute frame time
131 static Uint32 ticks;
132 Uint32 ticks_elapsed = SDL_GetTicks() - ticks;
133 ticks = SDL_GetTicks();
134 asc_context.elapsed_millis = ticks_elapsed;
135 asc_context.elapsed = (float) ticks_elapsed / 1000.0f;
137 return !asc_test_flag(asc_context.flags, ASC_FLAG_QUIT);
138 }