1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/window.c Wed Nov 01 20:09:49 2023 +0100
1.3 @@ -0,0 +1,200 @@
1.4 +/*
1.5 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
1.6 + * Copyright 2023 Mike Becker. All rights reserved.
1.7 + *
1.8 + * Redistribution and use in source and binary forms, with or without
1.9 + * modification, are permitted provided that the following conditions are met:
1.10 + *
1.11 + * 1. Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + *
1.14 + * 2. Redistributions in binary form must reproduce the above copyright
1.15 + * notice, this list of conditions and the following disclaimer in the
1.16 + * documentation and/or other materials provided with the distribution.
1.17 + *
1.18 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.19 + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.21 + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
1.22 + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.23 + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.24 + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.25 + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.26 + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.27 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.28 + * POSSIBILITY OF SUCH DAMAGE.
1.29 + */
1.30 +
1.31 +#include "ascension/window.h"
1.32 +
1.33 +#include <cx/linked_list.h>
1.34 +#include <cx/printf.h>
1.35 +
1.36 +#include <GL/glew.h>
1.37 +
1.38 +static void asc_gl_debug_callback(
1.39 + GLenum source, GLenum type, GLuint id, GLenum severity,
1.40 + GLsizei length, const GLchar* message,
1.41 + const void* userParam
1.42 +) {
1.43 + cxmutstr buf = cx_asprintf(
1.44 + "source = %d, id = %u, type = %d, severity= %d, message = %.*s",
1.45 + source, id, type, severity, length, message);
1.46 + if (type == GL_DEBUG_TYPE_ERROR) {
1.47 + asc_error(buf.ptr);
1.48 + } else {
1.49 + asc_dprintf("GL debug: %*.s", (int)buf.length, buf.ptr);
1.50 + }
1.51 + cx_strfree(&buf);
1.52 +}
1.53 +
1.54 +
1.55 +static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {
1.56 + CxIterator iter = cxListIterator(asc_context.windows);
1.57 + cx_foreach(AscWindow*, w, iter) {
1.58 + if (w->id == id) {
1.59 + w->dimensions.width = width;
1.60 + w->dimensions.height = height;
1.61 + return;
1.62 + }
1.63 + }
1.64 +}
1.65 +
1.66 +bool asc_loop_next(void) {
1.67 + // dispatch SDL events
1.68 + SDL_Event event;
1.69 + while (SDL_PollEvent(&event)) {
1.70 + switch (event.type) {
1.71 + case SDL_QUIT:return false;
1.72 + case SDL_WINDOWEVENT: {
1.73 + if (event.window.type == SDL_WINDOWEVENT_RESIZED)
1.74 + asc_event_window_resized(
1.75 + event.window.windowID,
1.76 + event.window.data1,
1.77 + event.window.data2
1.78 + );
1.79 + break;
1.80 + }
1.81 + case SDL_KEYDOWN:
1.82 + // TODO: remove this code and implement key press map instead
1.83 + if (event.key.keysym.sym == SDLK_ESCAPE)
1.84 + return false;
1.85 + break;
1.86 + case SDL_KEYUP:
1.87 + // TODO: implement key press map
1.88 + break;
1.89 + }
1.90 + }
1.91 +
1.92 + // sync the windows
1.93 + CxMutIterator windows = cxListMutIterator(asc_context.windows);
1.94 + cx_foreach(AscWindow*, w, windows) {
1.95 + asc_window_sync(w);
1.96 + }
1.97 + return true;
1.98 +}
1.99 +
1.100 +void asc_window_settings_init_defaults(AscWindowSettings* settings) {
1.101 + settings->depth_size = 24;
1.102 + settings->vsync = 1;
1.103 + settings->dimensions.width = 800;
1.104 + settings->dimensions.height = 600;
1.105 + settings->fullscreen = 0;
1.106 + settings->gl_major_version = 3;
1.107 + settings->gl_minor_version = 3;
1.108 + settings->title = "Ascended Window";
1.109 +}
1.110 +
1.111 +void asc_window_initialize(AscWindow* window, AscWindowSettings const* settings) {
1.112 + Uint32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
1.113 + flags |= settings->fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : SDL_WINDOW_RESIZABLE;
1.114 +
1.115 + window->window = SDL_CreateWindow(
1.116 + settings->title,
1.117 + SDL_WINDOWPOS_CENTERED,
1.118 + SDL_WINDOWPOS_CENTERED,
1.119 + settings->dimensions.width,
1.120 + settings->dimensions.height,
1.121 + flags
1.122 + );
1.123 + if (window->window == NULL) {
1.124 + asc_error(SDL_GetError());
1.125 + return;
1.126 + }
1.127 +
1.128 + window->id = SDL_GetWindowID(window->window);
1.129 + SDL_GetWindowSize(window->window,
1.130 + &window->dimensions.width,
1.131 + &window->dimensions.height
1.132 + );
1.133 +
1.134 + SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
1.135 + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, settings->gl_major_version);
1.136 + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, settings->gl_minor_version);
1.137 + SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, settings->depth_size);
1.138 + SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
1.139 + window->glctx = SDL_GL_CreateContext(window->window);
1.140 + if (window->glctx == NULL) {
1.141 + asc_dprintf("Creating GL context failed for window %u", window->id);
1.142 + } else {
1.143 + glewExperimental = GL_TRUE;
1.144 + GLenum err = glewInit();
1.145 + if (err == GLEW_OK) {
1.146 + SDL_GL_SetSwapInterval(settings->vsync);
1.147 + glEnable(GL_DEPTH_TEST);
1.148 + glEnable(GL_BLEND);
1.149 + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1.150 + glEnable(GL_DEBUG_OUTPUT);
1.151 + glDebugMessageCallback(asc_gl_debug_callback, NULL);
1.152 + asc_dprintf("Window %u initialized", window->id);
1.153 + cxListAdd(asc_context.windows, window);
1.154 + return;
1.155 + } else {
1.156 + asc_error(glewGetErrorString(err));
1.157 + }
1.158 + }
1.159 +
1.160 + // cleanup on error
1.161 + if (window->glctx != NULL) {
1.162 + SDL_GL_DeleteContext(window->glctx);
1.163 + }
1.164 + window->glctx = NULL;
1.165 + SDL_DestroyWindow(window->window);
1.166 + window->window = NULL;
1.167 + window->id = 0;
1.168 +}
1.169 +
1.170 +void asc_window_destroy_impl(AscWindow* window) {
1.171 + // destory the GL context and the window
1.172 + if (window->glctx != NULL) {
1.173 + SDL_GL_DeleteContext(window->glctx);
1.174 + }
1.175 + if (window->window != NULL) {
1.176 + SDL_DestroyWindow(window->window);
1.177 + }
1.178 +
1.179 + // clean the data
1.180 + asc_dprintf("Window %u and its OpenGL context destroyed.", window->id);
1.181 + memset(window, 0, sizeof(AscWindow));
1.182 +}
1.183 +
1.184 +void asc_window_destroy(AscWindow* window) {
1.185 + // find the window in the context and remove it
1.186 + bool found = false;
1.187 + CxMutIterator iter = cxListMutIterator(asc_context.windows);
1.188 + cx_foreach(AscWindow*, w, iter) {
1.189 + if (w == window) {
1.190 + found = true;
1.191 + cxIteratorFlagRemoval(iter);
1.192 + }
1.193 + }
1.194 + if (!found) asc_window_destroy_impl(window);
1.195 +}
1.196 +
1.197 +void asc_window_sync(AscWindow const* window) {
1.198 + SDL_GL_MakeCurrent(window->window, window->glctx);
1.199 + SDL_GL_SwapWindow(window->window);
1.200 + glViewport(0, 0, window->dimensions.width, window->dimensions.height);
1.201 + glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
1.202 + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
1.203 +}
