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glfw/src/null_window.c
Camilla Löwy d0776e04a3 Null: Add non-functional EGL support 
This is done in preparation for runtime platform selection, to make sure
every platform can build with EGL enabled.

It may be possible to add support for things like the ANGLE null
platform later.
2021-10-12 12:54:35 +02:00

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//========================================================================
// GLFW 3.4 - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2016 Google Inc.
// Copyright (c) 2016-2019 Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
// It is fine to use C99 in this file because it will not be built with VS
//========================================================================
#include "internal.h"
#include <stdlib.h>
static void applySizeLimits(_GLFWwindow* window, int* width, int* height)
{
if (window->numer != GLFW_DONT_CARE && window->denom != GLFW_DONT_CARE)
{
const float ratio = (float) window->numer / (float) window->denom;
*height = (int) (*width / ratio);
}
if (window->minwidth != GLFW_DONT_CARE && *width < window->minwidth)
*width = window->minwidth;
else if (window->maxwidth != GLFW_DONT_CARE && *width > window->maxwidth)
*width = window->maxwidth;
if (window->minheight != GLFW_DONT_CARE && *height < window->minheight)
*height = window->minheight;
else if (window->maxheight != GLFW_DONT_CARE && *height > window->maxheight)
*height = window->maxheight;
}
static void fitToMonitor(_GLFWwindow* window)
{
GLFWvidmode mode;
_glfwPlatformGetVideoMode(window->monitor, &mode);
_glfwPlatformGetMonitorPos(window->monitor,
&window->null.xpos,
&window->null.ypos);
window->null.width = mode.width;
window->null.height = mode.height;
}
static void acquireMonitor(_GLFWwindow* window)
{
_glfwInputMonitorWindow(window->monitor, window);
}
static void releaseMonitor(_GLFWwindow* window)
{
if (window->monitor->window != window)
return;
_glfwInputMonitorWindow(window->monitor, NULL);
}
static int createNativeWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
if (window->monitor)
fitToMonitor(window);
else
{
window->null.xpos = 17;
window->null.ypos = 17;
window->null.width = wndconfig->width;
window->null.height = wndconfig->height;
}
window->null.visible = wndconfig->visible;
window->null.decorated = wndconfig->decorated;
window->null.maximized = wndconfig->maximized;
window->null.floating = wndconfig->floating;
window->null.transparent = fbconfig->transparent;
window->null.opacity = 1.f;
return GLFW_TRUE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
int _glfwPlatformCreateWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
if (!createNativeWindow(window, wndconfig, fbconfig))
return GLFW_FALSE;
if (ctxconfig->client != GLFW_NO_API)
{
if (ctxconfig->source == GLFW_NATIVE_CONTEXT_API ||
ctxconfig->source == GLFW_OSMESA_CONTEXT_API)
{
if (!_glfwInitOSMesa())
return GLFW_FALSE;
if (!_glfwCreateContextOSMesa(window, ctxconfig, fbconfig))
return GLFW_FALSE;
}
else if (ctxconfig->source == GLFW_EGL_CONTEXT_API)
{
if (!_glfwInitEGL())
return GLFW_FALSE;
if (!_glfwCreateContextEGL(window, ctxconfig, fbconfig))
return GLFW_FALSE;
}
}
if (window->monitor)
{
_glfwPlatformShowWindow(window);
_glfwPlatformFocusWindow(window);
acquireMonitor(window);
}
return GLFW_TRUE;
}
void _glfwPlatformDestroyWindow(_GLFWwindow* window)
{
if (window->monitor)
releaseMonitor(window);
if (_glfw.null.focusedWindow == window)
_glfw.null.focusedWindow = NULL;
if (window->context.destroy)
window->context.destroy(window);
}
void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
{
}
void _glfwPlatformSetWindowIcon(_GLFWwindow* window, int count,
const GLFWimage* images)
{
}
void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
_GLFWmonitor* monitor,
int xpos, int ypos,
int width, int height,
int refreshRate)
{
if (window->monitor == monitor)
{
if (!monitor)
{
_glfwPlatformSetWindowPos(window, xpos, ypos);
_glfwPlatformSetWindowSize(window, width, height);
}
return;
}
if (window->monitor)
releaseMonitor(window);
_glfwInputWindowMonitor(window, monitor);
if (window->monitor)
{
window->null.visible = GLFW_TRUE;
acquireMonitor(window);
fitToMonitor(window);
}
else
{
_glfwPlatformSetWindowPos(window, xpos, ypos);
_glfwPlatformSetWindowSize(window, width, height);
}
}
void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
{
if (xpos)
*xpos = window->null.xpos;
if (ypos)
*ypos = window->null.ypos;
}
void _glfwPlatformSetWindowPos(_GLFWwindow* window, int xpos, int ypos)
{
if (window->monitor)
return;
if (window->null.xpos != xpos || window->null.ypos != ypos)
{
window->null.xpos = xpos;
window->null.ypos = ypos;
_glfwInputWindowPos(window, xpos, ypos);
}
}
void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height)
{
if (width)
*width = window->null.width;
if (height)
*height = window->null.height;
}
void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
{
if (window->monitor)
return;
if (window->null.width != width || window->null.height != height)
{
window->null.width = width;
window->null.height = height;
_glfwInputWindowSize(window, width, height);
_glfwInputFramebufferSize(window, width, height);
}
}
void _glfwPlatformSetWindowSizeLimits(_GLFWwindow* window,
int minwidth, int minheight,
int maxwidth, int maxheight)
{
int width = window->null.width;
int height = window->null.height;
applySizeLimits(window, &width, &height);
_glfwPlatformSetWindowSize(window, width, height);
}
void _glfwPlatformSetWindowAspectRatio(_GLFWwindow* window, int n, int d)
{
int width = window->null.width;
int height = window->null.height;
applySizeLimits(window, &width, &height);
_glfwPlatformSetWindowSize(window, width, height);
}
void _glfwPlatformGetFramebufferSize(_GLFWwindow* window, int* width, int* height)
{
if (width)
*width = window->null.width;
if (height)
*height = window->null.height;
}
void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
int* left, int* top,
int* right, int* bottom)
{
if (window->null.decorated && !window->monitor)
{
if (left)
*left = 1;
if (top)
*top = 10;
if (right)
*right = 1;
if (bottom)
*bottom = 1;
}
else
{
if (left)
*left = 0;
if (top)
*top = 0;
if (right)
*right = 0;
if (bottom)
*bottom = 0;
}
}
void _glfwPlatformGetWindowContentScale(_GLFWwindow* window,
float* xscale, float* yscale)
{
if (xscale)
*xscale = 1.f;
if (yscale)
*yscale = 1.f;
}
void _glfwPlatformIconifyWindow(_GLFWwindow* window)
{
if (_glfw.null.focusedWindow == window)
{
_glfw.null.focusedWindow = NULL;
_glfwInputWindowFocus(window, GLFW_FALSE);
}
if (!window->null.iconified)
{
window->null.iconified = GLFW_TRUE;
_glfwInputWindowIconify(window, GLFW_TRUE);
if (window->monitor)
releaseMonitor(window);
}
}
void _glfwPlatformRestoreWindow(_GLFWwindow* window)
{
if (window->null.iconified)
{
window->null.iconified = GLFW_FALSE;
_glfwInputWindowIconify(window, GLFW_FALSE);
if (window->monitor)
acquireMonitor(window);
}
else if (window->null.maximized)
{
window->null.maximized = GLFW_FALSE;
_glfwInputWindowMaximize(window, GLFW_FALSE);
}
}
void _glfwPlatformMaximizeWindow(_GLFWwindow* window)
{
if (!window->null.maximized)
{
window->null.maximized = GLFW_TRUE;
_glfwInputWindowMaximize(window, GLFW_TRUE);
}
}
int _glfwPlatformWindowMaximized(_GLFWwindow* window)
{
return window->null.maximized;
}
int _glfwPlatformWindowHovered(_GLFWwindow* window)
{
return _glfw.null.xcursor >= window->null.xpos &&
_glfw.null.ycursor >= window->null.ypos &&
_glfw.null.xcursor <= window->null.xpos + window->null.width - 1 &&
_glfw.null.ycursor <= window->null.ypos + window->null.height - 1;
}
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
{
return window->null.transparent;
}
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled)
{
window->null.resizable = enabled;
}
void _glfwPlatformSetWindowDecorated(_GLFWwindow* window, GLFWbool enabled)
{
window->null.decorated = enabled;
}
void _glfwPlatformSetWindowFloating(_GLFWwindow* window, GLFWbool enabled)
{
window->null.floating = enabled;
}
void _glfwPlatformSetWindowMousePassthrough(_GLFWwindow* window, GLFWbool enabled)
{
}
float _glfwPlatformGetWindowOpacity(_GLFWwindow* window)
{
return window->null.opacity;
}
void _glfwPlatformSetWindowOpacity(_GLFWwindow* window, float opacity)
{
window->null.opacity = opacity;
}
void _glfwPlatformSetRawMouseMotion(_GLFWwindow *window, GLFWbool enabled)
{
}
GLFWbool _glfwPlatformRawMouseMotionSupported(void)
{
return GLFW_TRUE;
}
void _glfwPlatformShowWindow(_GLFWwindow* window)
{
window->null.visible = GLFW_TRUE;
}
void _glfwPlatformRequestWindowAttention(_GLFWwindow* window)
{
}
void _glfwPlatformHideWindow(_GLFWwindow* window)
{
if (_glfw.null.focusedWindow == window)
{
_glfw.null.focusedWindow = NULL;
_glfwInputWindowFocus(window, GLFW_FALSE);
}
window->null.visible = GLFW_FALSE;
}
void _glfwPlatformFocusWindow(_GLFWwindow* window)
{
if (_glfw.null.focusedWindow == window)
return;
if (!window->null.visible)
return;
_GLFWwindow* previous = _glfw.null.focusedWindow;
_glfw.null.focusedWindow = window;
if (previous)
{
_glfwInputWindowFocus(previous, GLFW_FALSE);
if (previous->monitor && previous->autoIconify)
_glfwPlatformIconifyWindow(previous);
}
_glfwInputWindowFocus(window, GLFW_TRUE);
}
int _glfwPlatformWindowFocused(_GLFWwindow* window)
{
return _glfw.null.focusedWindow == window;
}
int _glfwPlatformWindowIconified(_GLFWwindow* window)
{
return window->null.iconified;
}
int _glfwPlatformWindowVisible(_GLFWwindow* window)
{
return window->null.visible;
}
void _glfwPlatformPollEvents(void)
{
}
void _glfwPlatformWaitEvents(void)
{
}
void _glfwPlatformWaitEventsTimeout(double timeout)
{
}
void _glfwPlatformPostEmptyEvent(void)
{
}
void _glfwPlatformGetCursorPos(_GLFWwindow* window, double* xpos, double* ypos)
{
if (xpos)
*xpos = _glfw.null.xcursor - window->null.xpos;
if (ypos)
*ypos = _glfw.null.ycursor - window->null.ypos;
}
void _glfwPlatformSetCursorPos(_GLFWwindow* window, double x, double y)
{
_glfw.null.xcursor = window->null.xpos + (int) x;
_glfw.null.ycursor = window->null.ypos + (int) y;
}
void _glfwPlatformSetCursorMode(_GLFWwindow* window, int mode)
{
}
int _glfwPlatformCreateCursor(_GLFWcursor* cursor,
const GLFWimage* image,
int xhot, int yhot)
{
return GLFW_TRUE;
}
int _glfwPlatformCreateStandardCursor(_GLFWcursor* cursor, int shape)
{
return GLFW_TRUE;
}
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
{
}
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
{
}
void _glfwPlatformSetClipboardString(const char* string)
{
char* copy = _glfw_strdup(string);
_glfw_free(_glfw.null.clipboardString);
_glfw.null.clipboardString = copy;
}
const char* _glfwPlatformGetClipboardString(void)
{
return _glfw.null.clipboardString;
}
EGLenum _glfwPlatformGetEGLPlatform(EGLint** attribs)
{
return 0;
}
EGLNativeDisplayType _glfwPlatformGetEGLNativeDisplay(void)
{
return 0;
}
EGLNativeWindowType _glfwPlatformGetEGLNativeWindow(_GLFWwindow* window)
{
return 0;
}
const char* _glfwPlatformGetScancodeName(int scancode)
{
if (scancode < GLFW_KEY_SPACE || scancode > GLFW_KEY_LAST)
{
_glfwInputError(GLFW_INVALID_VALUE, "Invalid scancode %i", scancode);
return NULL;
}
switch (scancode)
{
case GLFW_KEY_APOSTROPHE:
return "'";
case GLFW_KEY_COMMA:
return ",";
case GLFW_KEY_MINUS:
case GLFW_KEY_KP_SUBTRACT:
return "-";
case GLFW_KEY_PERIOD:
case GLFW_KEY_KP_DECIMAL:
return ".";
case GLFW_KEY_SLASH:
case GLFW_KEY_KP_DIVIDE:
return "/";
case GLFW_KEY_SEMICOLON:
return ";";
case GLFW_KEY_EQUAL:
case GLFW_KEY_KP_EQUAL:
return "=";
case GLFW_KEY_LEFT_BRACKET:
return "[";
case GLFW_KEY_RIGHT_BRACKET:
return "]";
case GLFW_KEY_KP_MULTIPLY:
return "*";
case GLFW_KEY_KP_ADD:
return "+";
case GLFW_KEY_BACKSLASH:
case GLFW_KEY_WORLD_1:
case GLFW_KEY_WORLD_2:
return "\\";
case GLFW_KEY_0:
case GLFW_KEY_KP_0:
return "0";
case GLFW_KEY_1:
case GLFW_KEY_KP_1:
return "1";
case GLFW_KEY_2:
case GLFW_KEY_KP_2:
return "2";
case GLFW_KEY_3:
case GLFW_KEY_KP_3:
return "3";
case GLFW_KEY_4:
case GLFW_KEY_KP_4:
return "4";
case GLFW_KEY_5:
case GLFW_KEY_KP_5:
return "5";
case GLFW_KEY_6:
case GLFW_KEY_KP_6:
return "6";
case GLFW_KEY_7:
case GLFW_KEY_KP_7:
return "7";
case GLFW_KEY_8:
case GLFW_KEY_KP_8:
return "8";
case GLFW_KEY_9:
case GLFW_KEY_KP_9:
return "9";
case GLFW_KEY_A:
return "a";
case GLFW_KEY_B:
return "b";
case GLFW_KEY_C:
return "c";
case GLFW_KEY_D:
return "d";
case GLFW_KEY_E:
return "e";
case GLFW_KEY_F:
return "f";
case GLFW_KEY_G:
return "g";
case GLFW_KEY_H:
return "h";
case GLFW_KEY_I:
return "i";
case GLFW_KEY_J:
return "j";
case GLFW_KEY_K:
return "k";
case GLFW_KEY_L:
return "l";
case GLFW_KEY_M:
return "m";
case GLFW_KEY_N:
return "n";
case GLFW_KEY_O:
return "o";
case GLFW_KEY_P:
return "p";
case GLFW_KEY_Q:
return "q";
case GLFW_KEY_R:
return "r";
case GLFW_KEY_S:
return "s";
case GLFW_KEY_T:
return "t";
case GLFW_KEY_U:
return "u";
case GLFW_KEY_V:
return "v";
case GLFW_KEY_W:
return "w";
case GLFW_KEY_X:
return "x";
case GLFW_KEY_Y:
return "y";
case GLFW_KEY_Z:
return "z";
}
return NULL;
}
int _glfwPlatformGetKeyScancode(int key)
{
return key;
}
void _glfwPlatformGetRequiredInstanceExtensions(char** extensions)
{
}
int _glfwPlatformGetPhysicalDevicePresentationSupport(VkInstance instance,
VkPhysicalDevice device,
uint32_t queuefamily)
{
return GLFW_FALSE;
}
VkResult _glfwPlatformCreateWindowSurface(VkInstance instance,
_GLFWwindow* window,
const VkAllocationCallbacks* allocator,
VkSurfaceKHR* surface)
{
// This seems like the most appropriate error to return here
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
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