421 lines
11 KiB
C
421 lines
11 KiB
C
//========================================================================
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// GLFW 3.3 - www.glfw.org
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2018 Camilla Löwy <elmindreda@glfw.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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// Please use C89 style variable declarations in this file because VS 2010
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//========================================================================
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#include "internal.h"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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// NOTE: The global variables below comprise all mutable global data in GLFW
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// Any other mutable global variable is a bug
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// This contains all mutable state shared between compilation units of GLFW
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//
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_GLFWlibrary _glfw = { GLFW_FALSE };
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// These are outside of _glfw so they can be used before initialization and
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// after termination without special handling when _glfw is cleared to zero
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//
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static _GLFWerror _glfwMainThreadError;
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static GLFWerrorfun _glfwErrorCallback;
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static _GLFWinitconfig _glfwInitHints =
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{
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GLFW_TRUE, // hat buttons
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{
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GLFW_TRUE, // macOS menu bar
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GLFW_TRUE // macOS bundle chdir
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}
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};
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// Terminate the library
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//
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static void terminate(void)
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{
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int i;
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memset(&_glfw.callbacks, 0, sizeof(_glfw.callbacks));
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while (_glfw.windowListHead)
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glfwDestroyWindow((GLFWwindow*) _glfw.windowListHead);
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while (_glfw.cursorListHead)
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glfwDestroyCursor((GLFWcursor*) _glfw.cursorListHead);
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for (i = 0; i < _glfw.monitorCount; i++)
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{
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_GLFWmonitor* monitor = _glfw.monitors[i];
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if (monitor->originalRamp.size)
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_glfwPlatformSetGammaRamp(monitor, &monitor->originalRamp);
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_glfwFreeMonitor(monitor);
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}
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free(_glfw.monitors);
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_glfw.monitors = NULL;
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_glfw.monitorCount = 0;
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free(_glfw.mappings);
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_glfw.mappings = NULL;
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_glfw.mappingCount = 0;
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_glfwTerminateVulkan();
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_glfwPlatformTerminate();
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_glfw.initialized = GLFW_FALSE;
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while (_glfw.errorListHead)
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{
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_GLFWerror* error = _glfw.errorListHead;
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_glfw.errorListHead = error->next;
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free(error);
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}
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_glfwPlatformDestroyTls(&_glfw.contextSlot);
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_glfwPlatformDestroyTls(&_glfw.errorSlot);
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_glfwPlatformDestroyMutex(&_glfw.errorLock);
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memset(&_glfw, 0, sizeof(_glfw));
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Encode a Unicode code point to a UTF-8 stream
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// Based on cutef8 by Jeff Bezanson (Public Domain)
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//
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size_t _glfwEncodeUTF8(char* s, uint32_t codepoint)
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{
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size_t count = 0;
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if (codepoint < 0x80)
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s[count++] = (char) codepoint;
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else if (codepoint < 0x800)
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{
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s[count++] = (codepoint >> 6) | 0xc0;
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s[count++] = (codepoint & 0x3f) | 0x80;
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}
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else if (codepoint < 0x10000)
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{
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s[count++] = (codepoint >> 12) | 0xe0;
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s[count++] = ((codepoint >> 6) & 0x3f) | 0x80;
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s[count++] = (codepoint & 0x3f) | 0x80;
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}
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else if (codepoint < 0x110000)
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{
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s[count++] = (codepoint >> 18) | 0xf0;
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s[count++] = ((codepoint >> 12) & 0x3f) | 0x80;
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s[count++] = ((codepoint >> 6) & 0x3f) | 0x80;
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s[count++] = (codepoint & 0x3f) | 0x80;
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}
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return count;
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}
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// Splits and translates a text/uri-list into separate file paths
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// NOTE: This function destroys the provided string
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//
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char** _glfwParseUriList(char* text, int* count)
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{
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const char* prefix = "file://";
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char** paths = NULL;
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char* line;
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*count = 0;
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while ((line = strtok(text, "\r\n")))
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{
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char* path;
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text = NULL;
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if (line[0] == '#')
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continue;
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if (strncmp(line, prefix, strlen(prefix)) == 0)
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{
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line += strlen(prefix);
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// TODO: Validate hostname
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while (*line != '/')
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line++;
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}
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(*count)++;
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path = calloc(strlen(line) + 1, 1);
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paths = realloc(paths, *count * sizeof(char*));
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paths[*count - 1] = path;
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while (*line)
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{
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if (line[0] == '%' && line[1] && line[2])
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{
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const char digits[3] = { line[1], line[2], '\0' };
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*path = (char) strtol(digits, NULL, 16);
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line += 2;
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}
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else
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*path = *line;
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path++;
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line++;
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}
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}
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return paths;
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}
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char* _glfw_strdup(const char* source)
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{
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const size_t length = strlen(source);
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char* result = calloc(length + 1, 1);
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strcpy(result, source);
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return result;
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}
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int _glfw_min(int a, int b)
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{
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return a < b ? a : b;
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}
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int _glfw_max(int a, int b)
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{
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return a > b ? a : b;
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}
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float _glfw_fminf(float a, float b)
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{
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if (a != a)
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return b;
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else if (b != b)
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return a;
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else if (a < b)
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return a;
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else
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return b;
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}
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float _glfw_fmaxf(float a, float b)
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{
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if (a != a)
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return b;
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else if (b != b)
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return a;
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else if (a > b)
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return a;
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else
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return b;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW event API //////
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//////////////////////////////////////////////////////////////////////////
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// Notifies shared code of an error
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//
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void _glfwInputError(int code, const char* format, ...)
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{
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_GLFWerror* error;
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char description[_GLFW_MESSAGE_SIZE];
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if (format)
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{
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va_list vl;
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va_start(vl, format);
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vsnprintf(description, sizeof(description), format, vl);
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va_end(vl);
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description[sizeof(description) - 1] = '\0';
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}
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else
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{
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if (code == GLFW_NOT_INITIALIZED)
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strcpy(description, "The GLFW library is not initialized");
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else if (code == GLFW_NO_CURRENT_CONTEXT)
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strcpy(description, "There is no current context");
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else if (code == GLFW_INVALID_ENUM)
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strcpy(description, "Invalid argument for enum parameter");
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else if (code == GLFW_INVALID_VALUE)
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strcpy(description, "Invalid value for parameter");
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else if (code == GLFW_OUT_OF_MEMORY)
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strcpy(description, "Out of memory");
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else if (code == GLFW_API_UNAVAILABLE)
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strcpy(description, "The requested API is unavailable");
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else if (code == GLFW_VERSION_UNAVAILABLE)
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strcpy(description, "The requested API version is unavailable");
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else if (code == GLFW_PLATFORM_ERROR)
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strcpy(description, "A platform-specific error occurred");
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else if (code == GLFW_FORMAT_UNAVAILABLE)
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strcpy(description, "The requested format is unavailable");
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else if (code == GLFW_NO_WINDOW_CONTEXT)
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strcpy(description, "The specified window has no context");
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else
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strcpy(description, "ERROR: UNKNOWN GLFW ERROR");
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}
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if (_glfw.initialized)
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{
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error = _glfwPlatformGetTls(&_glfw.errorSlot);
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if (!error)
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{
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error = calloc(1, sizeof(_GLFWerror));
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_glfwPlatformSetTls(&_glfw.errorSlot, error);
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_glfwPlatformLockMutex(&_glfw.errorLock);
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error->next = _glfw.errorListHead;
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_glfw.errorListHead = error;
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_glfwPlatformUnlockMutex(&_glfw.errorLock);
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}
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}
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else
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error = &_glfwMainThreadError;
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error->code = code;
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strcpy(error->description, description);
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if (_glfwErrorCallback)
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_glfwErrorCallback(code, description);
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW public API //////
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//////////////////////////////////////////////////////////////////////////
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GLFWAPI int glfwInit(void)
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{
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if (_glfw.initialized)
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return GLFW_TRUE;
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memset(&_glfw, 0, sizeof(_glfw));
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_glfw.hints.init = _glfwInitHints;
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if (!_glfwPlatformInit())
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{
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terminate();
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return GLFW_FALSE;
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}
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if (!_glfwPlatformCreateMutex(&_glfw.errorLock) ||
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!_glfwPlatformCreateTls(&_glfw.errorSlot) ||
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!_glfwPlatformCreateTls(&_glfw.contextSlot))
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{
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terminate();
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return GLFW_FALSE;
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}
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_glfwPlatformSetTls(&_glfw.errorSlot, &_glfwMainThreadError);
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_glfwInitGamepadMappings();
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_glfw.initialized = GLFW_TRUE;
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_glfw.timer.offset = _glfwPlatformGetTimerValue();
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glfwDefaultWindowHints();
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return GLFW_TRUE;
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}
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GLFWAPI void glfwTerminate(void)
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{
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if (!_glfw.initialized)
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return;
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terminate();
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}
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GLFWAPI void glfwInitHint(int hint, int value)
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{
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switch (hint)
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{
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case GLFW_JOYSTICK_HAT_BUTTONS:
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_glfwInitHints.hatButtons = value;
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return;
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case GLFW_COCOA_CHDIR_RESOURCES:
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_glfwInitHints.ns.chdir = value;
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return;
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case GLFW_COCOA_MENUBAR:
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_glfwInitHints.ns.menubar = value;
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return;
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}
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_glfwInputError(GLFW_INVALID_ENUM,
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"Invalid init hint 0x%08X", hint);
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}
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GLFWAPI void glfwGetVersion(int* major, int* minor, int* rev)
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{
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if (major != NULL)
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*major = GLFW_VERSION_MAJOR;
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if (minor != NULL)
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*minor = GLFW_VERSION_MINOR;
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if (rev != NULL)
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*rev = GLFW_VERSION_REVISION;
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}
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GLFWAPI const char* glfwGetVersionString(void)
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{
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return _glfwPlatformGetVersionString();
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}
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GLFWAPI int glfwGetError(const char** description)
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{
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_GLFWerror* error;
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int code = GLFW_NO_ERROR;
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if (description)
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*description = NULL;
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if (_glfw.initialized)
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error = _glfwPlatformGetTls(&_glfw.errorSlot);
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else
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error = &_glfwMainThreadError;
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if (error)
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{
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code = error->code;
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error->code = GLFW_NO_ERROR;
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if (description && code)
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*description = error->description;
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}
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return code;
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}
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GLFWAPI GLFWerrorfun glfwSetErrorCallback(GLFWerrorfun cbfun)
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{
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_GLFW_SWAP_POINTERS(_glfwErrorCallback, cbfun);
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return cbfun;
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}
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