Mon, 30 Oct 2023 17:59:37 +0100
fix possible double-invocation of asc_window_destroy_impl()
universe@0 | 1 | /* |
universe@0 | 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
universe@0 | 3 | * Copyright 2023 Mike Becker. All rights reserved. |
universe@0 | 4 | * |
universe@0 | 5 | * Redistribution and use in source and binary forms, with or without |
universe@0 | 6 | * modification, are permitted provided that the following conditions are met: |
universe@0 | 7 | * |
universe@0 | 8 | * 1. Redistributions of source code must retain the above copyright |
universe@0 | 9 | * notice, this list of conditions and the following disclaimer. |
universe@0 | 10 | * |
universe@0 | 11 | * 2. Redistributions in binary form must reproduce the above copyright |
universe@0 | 12 | * notice, this list of conditions and the following disclaimer in the |
universe@0 | 13 | * documentation and/or other materials provided with the distribution. |
universe@0 | 14 | * |
universe@0 | 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
universe@0 | 16 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
universe@0 | 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
universe@0 | 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
universe@0 | 19 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
universe@0 | 20 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
universe@0 | 21 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
universe@0 | 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
universe@0 | 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
universe@0 | 24 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
universe@0 | 25 | * POSSIBILITY OF SUCH DAMAGE. |
universe@0 | 26 | */ |
universe@0 | 27 | |
universe@0 | 28 | #include "ascension/core.h" |
universe@0 | 29 | #include "ascension/utils.h" |
universe@0 | 30 | |
universe@0 | 31 | #include <cx/linked_list.h> |
universe@0 | 32 | #include <cx/printf.h> |
universe@0 | 33 | |
universe@0 | 34 | static void asc_gl_debug_callback( |
universe@0 | 35 | GLenum source, GLenum type, GLuint id, GLenum severity, |
universe@0 | 36 | GLsizei length, const GLchar* message, |
universe@0 | 37 | const void* userParam |
universe@0 | 38 | ) { |
universe@0 | 39 | cxmutstr buf = cx_asprintf( |
universe@0 | 40 | "source = %d, id = %u, type = %d, severity= %d, message = %.*s", |
universe@0 | 41 | source, id, type, severity, length, message); |
universe@0 | 42 | if (type == GL_DEBUG_TYPE_ERROR) { |
universe@0 | 43 | asc_error(buf.ptr); |
universe@0 | 44 | } else { |
universe@0 | 45 | asc_dprintf("GL debug: %*.s", (int)buf.length, buf.ptr); |
universe@0 | 46 | } |
universe@0 | 47 | cx_strfree(&buf); |
universe@0 | 48 | } |
universe@0 | 49 | |
universe@0 | 50 | AscContext asc_context; |
universe@0 | 51 | |
universe@0 | 52 | // forward declarations |
universe@0 | 53 | static void asc_window_destroy_impl(AscWindow* window); |
universe@0 | 54 | |
universe@0 | 55 | void asc_context_initialize(void) { |
universe@0 | 56 | if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED)) |
universe@0 | 57 | return; |
universe@0 | 58 | asc_clear_flag(&asc_context.flags, ASC_FLAG_HAS_ERROR); |
universe@0 | 59 | |
universe@0 | 60 | // initialize error buffer |
universe@0 | 61 | cxBufferInit( |
universe@0 | 62 | &asc_context.error_buffer, |
universe@0 | 63 | NULL, |
universe@0 | 64 | 256, |
universe@0 | 65 | NULL, |
universe@0 | 66 | CX_BUFFER_AUTO_EXTEND |
universe@0 | 67 | ); |
universe@0 | 68 | |
universe@0 | 69 | // initialize lists |
universe@0 | 70 | asc_context.windows = cxLinkedListCreateSimple(CX_STORE_POINTERS); |
universe@0 | 71 | asc_context.windows->simple_destructor = |
universe@0 | 72 | (cx_destructor_func)asc_window_destroy_impl; |
universe@0 | 73 | |
universe@0 | 74 | // initialize SDL |
universe@0 | 75 | if (SDL_Init(SDL_INIT_VIDEO) < 0) { |
universe@0 | 76 | asc_error(SDL_GetError()); |
universe@0 | 77 | } else { |
universe@0 | 78 | if (TTF_Init() < 0) { |
universe@0 | 79 | asc_error(TTF_GetError()); |
universe@0 | 80 | } |
universe@0 | 81 | } |
universe@0 | 82 | SDL_ClearError(); |
universe@0 | 83 | asc_set_flag(&asc_context.flags, ASC_FLAG_INITILIZED); |
universe@0 | 84 | asc_dprintf("Ascension context initialized."); |
universe@0 | 85 | } |
universe@0 | 86 | |
universe@0 | 87 | void asc_context_destroy(void) { |
universe@0 | 88 | // destroy lists |
universe@0 | 89 | cxListDestroy(asc_context.windows); |
universe@0 | 90 | |
universe@0 | 91 | // quit SDL |
universe@0 | 92 | if (TTF_WasInit()) |
universe@0 | 93 | TTF_Quit(); |
universe@0 | 94 | SDL_Quit(); |
universe@0 | 95 | |
universe@0 | 96 | // destroy the error buffer |
universe@0 | 97 | cxBufferDestroy(&asc_context.error_buffer); |
universe@0 | 98 | asc_context.flags = 0; |
universe@0 | 99 | asc_dprintf("Ascension context destroyed."); |
universe@0 | 100 | } |
universe@0 | 101 | |
universe@0 | 102 | void asc_error_cchar(char const* text) { |
universe@0 | 103 | asc_error_cxstr(cx_str(text)); |
universe@0 | 104 | } |
universe@0 | 105 | |
universe@0 | 106 | void asc_error_cuchar(unsigned char const* text) { |
universe@0 | 107 | asc_error_cxstr(cx_str((char const*)text)); |
universe@0 | 108 | } |
universe@0 | 109 | |
universe@0 | 110 | void asc_error_cxstr(cxstring text) { |
universe@0 | 111 | if (text.length == 0) return; |
universe@0 | 112 | |
universe@0 | 113 | // write error to debug output |
universe@0 | 114 | asc_dprintf("ERROR: %*.s", (int)text.length, text.ptr); |
universe@0 | 115 | |
universe@0 | 116 | // write error to buffer |
universe@0 | 117 | CxBuffer* buf = &asc_context.error_buffer; |
universe@0 | 118 | cxBufferWrite(text.ptr, 1, text.length, buf); |
universe@0 | 119 | cxBufferPut(buf, '\n'); |
universe@0 | 120 | |
universe@0 | 121 | asc_set_flag(&asc_context.flags, ASC_FLAG_HAS_ERROR); |
universe@0 | 122 | } |
universe@0 | 123 | |
universe@0 | 124 | bool asc_has_error(void) { |
universe@0 | 125 | return asc_test_flag(asc_context.flags, ASC_FLAG_HAS_ERROR); |
universe@0 | 126 | } |
universe@0 | 127 | |
universe@0 | 128 | char const* asc_get_error(void) { |
universe@0 | 129 | // we zero-terminate the current buffer contents before providing them |
universe@0 | 130 | cxBufferPut(&asc_context.error_buffer, 0); |
universe@0 | 131 | --asc_context.error_buffer.pos; |
universe@0 | 132 | --asc_context.error_buffer.size; |
universe@0 | 133 | return asc_context.error_buffer.space; |
universe@0 | 134 | } |
universe@0 | 135 | |
universe@0 | 136 | void asc_clear_error(void) { |
universe@0 | 137 | cxBufferClear(&asc_context.error_buffer); |
universe@0 | 138 | asc_clear_flag(&asc_context.flags, ASC_FLAG_HAS_ERROR); |
universe@0 | 139 | } |
universe@0 | 140 | |
universe@0 | 141 | static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) { |
universe@0 | 142 | CxIterator iter = cxListIterator(asc_context.windows); |
universe@0 | 143 | cx_foreach(AscWindow*, w, iter) { |
universe@0 | 144 | if (w->id == id) { |
universe@0 | 145 | w->width = width; |
universe@0 | 146 | w->height = height; |
universe@0 | 147 | return; |
universe@0 | 148 | } |
universe@0 | 149 | } |
universe@0 | 150 | } |
universe@0 | 151 | |
universe@0 | 152 | bool asc_loop_next(void) { |
universe@0 | 153 | // dispatch SDL events |
universe@0 | 154 | SDL_Event event; |
universe@0 | 155 | while (SDL_PollEvent(&event)) { |
universe@0 | 156 | switch (event.type) { |
universe@0 | 157 | case SDL_QUIT:return false; |
universe@0 | 158 | case SDL_WINDOWEVENT: { |
universe@0 | 159 | if (event.window.type == SDL_WINDOWEVENT_RESIZED) |
universe@0 | 160 | asc_event_window_resized( |
universe@0 | 161 | event.window.windowID, |
universe@0 | 162 | event.window.data1, |
universe@0 | 163 | event.window.data2 |
universe@0 | 164 | ); |
universe@0 | 165 | break; |
universe@0 | 166 | } |
universe@0 | 167 | case SDL_KEYDOWN: |
universe@0 | 168 | // TODO: remove this code and implement key press map instead |
universe@0 | 169 | if (event.key.keysym.sym == SDLK_ESCAPE) |
universe@0 | 170 | return false; |
universe@0 | 171 | break; |
universe@0 | 172 | case SDL_KEYUP: |
universe@0 | 173 | // TODO: implement key press map |
universe@0 | 174 | break; |
universe@0 | 175 | } |
universe@0 | 176 | } |
universe@0 | 177 | |
universe@0 | 178 | // sync the windows |
universe@0 | 179 | CxMutIterator windows = cxListMutIterator(asc_context.windows); |
universe@0 | 180 | cx_foreach(AscWindow*, w, windows) { |
universe@0 | 181 | asc_window_sync(w); |
universe@0 | 182 | } |
universe@0 | 183 | return true; |
universe@0 | 184 | } |
universe@0 | 185 | |
universe@0 | 186 | void asc_window_settings_init_defaults(AscWindowSettings* settings) { |
universe@0 | 187 | settings->depth_size = 24; |
universe@0 | 188 | settings->vsync = 1; |
universe@0 | 189 | settings->width = 800; |
universe@0 | 190 | settings->height = 600; |
universe@0 | 191 | settings->fullscreen = 0; |
universe@0 | 192 | settings->gl_major_version = 3; |
universe@0 | 193 | settings->gl_minor_version = 3; |
universe@0 | 194 | settings->title = "Ascended Window"; |
universe@0 | 195 | } |
universe@0 | 196 | |
universe@0 | 197 | void asc_window_initialize(AscWindow* window, AscWindowSettings const* settings) { |
universe@0 | 198 | Uint32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN; |
universe@0 | 199 | flags |= settings->fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : SDL_WINDOW_RESIZABLE; |
universe@0 | 200 | |
universe@0 | 201 | window->window = SDL_CreateWindow( |
universe@0 | 202 | settings->title, |
universe@0 | 203 | SDL_WINDOWPOS_CENTERED, |
universe@0 | 204 | SDL_WINDOWPOS_CENTERED, |
universe@0 | 205 | settings->width, |
universe@0 | 206 | settings->height, |
universe@0 | 207 | flags |
universe@0 | 208 | ); |
universe@0 | 209 | if (window->window == NULL) { |
universe@0 | 210 | asc_error(SDL_GetError()); |
universe@0 | 211 | return; |
universe@0 | 212 | } |
universe@0 | 213 | |
universe@0 | 214 | window->id = SDL_GetWindowID(window->window); |
universe@0 | 215 | SDL_GetWindowSize(window->window, &window->width, &window->height); |
universe@0 | 216 | |
universe@0 | 217 | SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE); |
universe@0 | 218 | SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, settings->gl_major_version); |
universe@0 | 219 | SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, settings->gl_minor_version); |
universe@0 | 220 | SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, settings->depth_size); |
universe@0 | 221 | SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); |
universe@0 | 222 | window->glctx = SDL_GL_CreateContext(window->window); |
universe@0 | 223 | if (window->glctx == NULL) { |
universe@0 | 224 | asc_dprintf("Creating GL context failed for window %u", window->id); |
universe@0 | 225 | } else { |
universe@0 | 226 | glewExperimental = GL_TRUE; |
universe@0 | 227 | GLenum err = glewInit(); |
universe@0 | 228 | if (err == GLEW_OK) { |
universe@0 | 229 | SDL_GL_SetSwapInterval(settings->vsync); |
universe@0 | 230 | glEnable(GL_DEPTH_TEST); |
universe@0 | 231 | glEnable(GL_BLEND); |
universe@0 | 232 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
universe@0 | 233 | glEnable(GL_DEBUG_OUTPUT); |
universe@0 | 234 | glDebugMessageCallback(asc_gl_debug_callback, NULL); |
universe@0 | 235 | asc_dprintf("Window %u initialized", window->id); |
universe@0 | 236 | cxListAdd(asc_context.windows, window); |
universe@0 | 237 | return; |
universe@0 | 238 | } else { |
universe@0 | 239 | asc_error(glewGetErrorString(err)); |
universe@0 | 240 | } |
universe@0 | 241 | } |
universe@0 | 242 | |
universe@0 | 243 | // cleanup on error |
universe@0 | 244 | if (window->glctx != NULL) { |
universe@0 | 245 | SDL_GL_DeleteContext(window->glctx); |
universe@0 | 246 | } |
universe@0 | 247 | window->glctx = NULL; |
universe@0 | 248 | SDL_DestroyWindow(window->window); |
universe@0 | 249 | window->window = NULL; |
universe@0 | 250 | window->id = 0; |
universe@0 | 251 | } |
universe@0 | 252 | |
universe@0 | 253 | void asc_window_destroy_impl(AscWindow* window) { |
universe@0 | 254 | // destory the GL context and the window |
universe@0 | 255 | if (window->glctx != NULL) { |
universe@0 | 256 | SDL_GL_DeleteContext(window->glctx); |
universe@0 | 257 | } |
universe@0 | 258 | if (window->window != NULL) { |
universe@0 | 259 | SDL_DestroyWindow(window->window); |
universe@0 | 260 | } |
universe@0 | 261 | |
universe@0 | 262 | // clean the data |
universe@0 | 263 | asc_dprintf("Window %u and its OpenGL context destroyed.", window->id); |
universe@0 | 264 | memset(window, 0, sizeof(AscWindow)); |
universe@0 | 265 | } |
universe@0 | 266 | |
universe@0 | 267 | void asc_window_destroy(AscWindow* window) { |
universe@0 | 268 | // find the window in the context and remove it |
universe@2 | 269 | bool found = false; |
universe@0 | 270 | CxMutIterator iter = cxListMutIterator(asc_context.windows); |
universe@0 | 271 | cx_foreach(AscWindow*, w, iter) { |
universe@0 | 272 | if (w == window) { |
universe@2 | 273 | found = true; |
universe@0 | 274 | cxIteratorFlagRemoval(iter); |
universe@0 | 275 | } |
universe@0 | 276 | } |
universe@2 | 277 | if (!found) asc_window_destroy_impl(window); |
universe@0 | 278 | } |
universe@0 | 279 | |
universe@0 | 280 | void asc_window_sync(AscWindow const* window) { |
universe@0 | 281 | SDL_GL_MakeCurrent(window->window, window->glctx); |
universe@0 | 282 | SDL_GL_SwapWindow(window->window); |
universe@0 | 283 | glViewport(0, 0, window->width, window->height); |
universe@0 | 284 | glClearColor(0.0f, 0.0f, 0.0f, 1.0f); |
universe@0 | 285 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
universe@0 | 286 | } |