ascension: src/core.c@e3113d4e2fc0 (annotated)

src/core.c@e3113d4e2fc0 (annotated)

src/core.c

Mon, 30 Oct 2023 17:40:34 +0100

author: Mike Becker <universe@uap-core.de>
date: Mon, 30 Oct 2023 17:40:34 +0100
changeset 1: e3113d4e2fc0
parent 0: 593b60458157
child 2: bb2bfff31f1d
permissions: -rw-r--r--

update uwproj files

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  * Copyright 2023 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "ascension/core.h"
 #include "ascension/utils.h"
 #include <cx/linked_list.h>
 #include <cx/printf.h>
 static void asc_gl_debug_callback(
         GLenum source, GLenum type, GLuint id, GLenum severity,
         GLsizei length, const GLchar* message,
         const void* userParam
 ) {
     cxmutstr buf = cx_asprintf(
             "source = %d, id = %u, type = %d, severity= %d, message = %.*s",
             source, id, type, severity, length, message);
     if (type == GL_DEBUG_TYPE_ERROR) {
         asc_error(buf.ptr);
     } else {
         asc_dprintf("GL debug: %*.s", (int)buf.length, buf.ptr);
     }
     cx_strfree(&buf);
 }
 AscContext asc_context;
 // forward declarations
 static void asc_window_destroy_impl(AscWindow* window);
 void asc_context_initialize(void) {
     if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED))
         return;
     asc_clear_flag(&asc_context.flags, ASC_FLAG_HAS_ERROR);
     // initialize error buffer
     cxBufferInit(
             &asc_context.error_buffer,
             NULL,
 ,
             NULL,
             CX_BUFFER_AUTO_EXTEND
     );
     // initialize lists
     asc_context.windows = cxLinkedListCreateSimple(CX_STORE_POINTERS);
     asc_context.windows->simple_destructor =
             (cx_destructor_func)asc_window_destroy_impl;
     // initialize SDL
     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
         asc_error(SDL_GetError());
     } else {
         if (TTF_Init() < 0) {
             asc_error(TTF_GetError());
         }
     }
     SDL_ClearError();
     asc_set_flag(&asc_context.flags, ASC_FLAG_INITILIZED);
     asc_dprintf("Ascension context initialized.");
 }
 void asc_context_destroy(void) {
     // destroy lists
     cxListDestroy(asc_context.windows);
     // quit SDL
     if (TTF_WasInit())
         TTF_Quit();
     SDL_Quit();
     // destroy the error buffer
     cxBufferDestroy(&asc_context.error_buffer);
     asc_context.flags = 0;
     asc_dprintf("Ascension context destroyed.");
 }
 void asc_error_cchar(char const* text) {
     asc_error_cxstr(cx_str(text));
 }
 void asc_error_cuchar(unsigned char const* text) {
     asc_error_cxstr(cx_str((char const*)text));
 }
 void asc_error_cxstr(cxstring text) {
     if (text.length == 0) return;
     // write error to debug output
     asc_dprintf("ERROR: %*.s", (int)text.length, text.ptr);
     // write error to buffer
     CxBuffer* buf = &asc_context.error_buffer;
     cxBufferWrite(text.ptr, 1, text.length, buf);
     cxBufferPut(buf, '\n');
     asc_set_flag(&asc_context.flags, ASC_FLAG_HAS_ERROR);
 }
 bool asc_has_error(void) {
     return asc_test_flag(asc_context.flags, ASC_FLAG_HAS_ERROR);
 }
 char const* asc_get_error(void) {
     // we zero-terminate the current buffer contents before providing them
     cxBufferPut(&asc_context.error_buffer, 0);
     --asc_context.error_buffer.pos;
     --asc_context.error_buffer.size;
     return asc_context.error_buffer.space;
 }
 void asc_clear_error(void) {
     cxBufferClear(&asc_context.error_buffer);
     asc_clear_flag(&asc_context.flags, ASC_FLAG_HAS_ERROR);
 }
 static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {
     CxIterator iter = cxListIterator(asc_context.windows);
     cx_foreach(AscWindow*, w, iter) {
         if (w->id == id) {
             w->width = width;
             w->height = height;
             return;
         }
     }
 }
 bool asc_loop_next(void) {
     // dispatch SDL events
     SDL_Event event;
     while (SDL_PollEvent(&event)) {
         switch (event.type) {
         case SDL_QUIT:return false;
         case SDL_WINDOWEVENT: {
             if (event.window.type == SDL_WINDOWEVENT_RESIZED)
                 asc_event_window_resized(
                         event.window.windowID,
                         event.window.data1,
                         event.window.data2
                 );
             break;
         }
         case SDL_KEYDOWN:
             // TODO: remove this code and implement key press map instead
             if (event.key.keysym.sym == SDLK_ESCAPE)
                 return false;
             break;
         case SDL_KEYUP:
             // TODO: implement key press map
             break;
         }
     }
     // sync the windows
     CxMutIterator windows = cxListMutIterator(asc_context.windows);
     cx_foreach(AscWindow*, w, windows) {
         asc_window_sync(w);
     }
     return true;
 }
 void asc_window_settings_init_defaults(AscWindowSettings* settings) {
     settings->depth_size = 24;
     settings->vsync = 1;
     settings->width = 800;
     settings->height = 600;
     settings->fullscreen = 0;
     settings->gl_major_version = 3;
     settings->gl_minor_version = 3;
     settings->title = "Ascended Window";
 }
 void asc_window_initialize(AscWindow* window, AscWindowSettings const* settings) {
     Uint32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
     flags |= settings->fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : SDL_WINDOW_RESIZABLE;
     window->window = SDL_CreateWindow(
             settings->title,
             SDL_WINDOWPOS_CENTERED,
             SDL_WINDOWPOS_CENTERED,
             settings->width,
             settings->height,
             flags
     );
     if (window->window == NULL) {
         asc_error(SDL_GetError());
         return;
     }
     window->id = SDL_GetWindowID(window->window);
     SDL_GetWindowSize(window->window, &window->width, &window->height);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, settings->gl_major_version);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, settings->gl_minor_version);
     SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, settings->depth_size);
     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
     window->glctx = SDL_GL_CreateContext(window->window);
     if (window->glctx == NULL) {
         asc_dprintf("Creating GL context failed for window %u", window->id);
     } else {
         glewExperimental = GL_TRUE;
         GLenum err = glewInit();
         if (err == GLEW_OK) {
             SDL_GL_SetSwapInterval(settings->vsync);
             glEnable(GL_DEPTH_TEST);
             glEnable(GL_BLEND);
             glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
             glEnable(GL_DEBUG_OUTPUT);
             glDebugMessageCallback(asc_gl_debug_callback, NULL);
             asc_dprintf("Window %u initialized", window->id);
             cxListAdd(asc_context.windows, window);
             return;
         } else {
             asc_error(glewGetErrorString(err));
         }
     }
     // cleanup on error
     if (window->glctx != NULL) {
         SDL_GL_DeleteContext(window->glctx);
     }
     window->glctx = NULL;
     SDL_DestroyWindow(window->window);
     window->window = NULL;
     window->id = 0;
 }
 void asc_window_destroy_impl(AscWindow* window) {
     // destory the GL context and the window
     if (window->glctx != NULL) {
         SDL_GL_DeleteContext(window->glctx);
     }
     if (window->window != NULL) {
         SDL_DestroyWindow(window->window);
     }
     // clean the data
     asc_dprintf("Window %u and its OpenGL context destroyed.", window->id);
     memset(window, 0, sizeof(AscWindow));
 }
 void asc_window_destroy(AscWindow* window) {
     // find the window in the context and remove it
     CxMutIterator iter = cxListMutIterator(asc_context.windows);
     cx_foreach(AscWindow*, w, iter) {
         if (w == window) {
             asc_dprintf("Window %u removed from context.", window->id);
             cxIteratorFlagRemoval(iter);
         }
     }
     asc_window_destroy_impl(window);
 }
 void asc_window_sync(AscWindow const* window) {
     SDL_GL_MakeCurrent(window->window, window->glctx);
     SDL_GL_SwapWindow(window->window);
     glViewport(0, 0, window->width, window->height);
     glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 }

Mercurial > hg > ascension / annotate

src/core.c@e3113d4e2fc0 (annotated)

src/core.c