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glfw/src/null_window.c
Camilla Löwy 56a4cb0a3a Add runtime platform selection 
This adds compile-time support for multiple platforms and runtime
detection of them.  Window system related platform functions are now
called from shared code via the function pointer struct _GLFWplatform.

The timer, thread and module loading platform functions are still called
directly by name and the implementation chosen at link-time.  These
functions are the same for any backend on a given OS, including the Null
backend.

The platforms are now enabled via CMake dependent options following the
GLFW_BUILD_<platform> pattern instead of a mix of automagic and ad-hoc
option names.  There is no longer any option for the Null backend as it
is now always enabled.

Much of the struct stitching work in platform.h was based on an earlier
experimental branch for runtime platform selection by @ronchaine.

Every platform function related to windows, contexts, monitors, input,
event processing and Vulkan have been renamed so that multiple sets of
them can exist without colliding.  Calls to these are now routed through
the _glfw.platform struct member.  These changes makes up most of this
commit.

For Wayland and X11 the client library loading and display creation is
used to detect a running compositor/server.  The XDG_SESSION_TYPE
environment variable is ignored for now, as X11 is still by far the more
complete implementation.

Closes #1655
Closes #1958
2021-10-13 21:47:11 +02:00

698 lines
17 KiB
C
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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;
_glfwGetVideoModeNull(window->monitor, &mode);
_glfwGetMonitorPosNull(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 _glfwCreateWindowNull(_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)
{
_glfwShowWindowNull(window);
_glfwFocusWindowNull(window);
acquireMonitor(window);
}
return GLFW_TRUE;
}
void _glfwDestroyWindowNull(_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 _glfwSetWindowTitleNull(_GLFWwindow* window, const char* title)
{
}
void _glfwSetWindowIconNull(_GLFWwindow* window, int count, const GLFWimage* images)
{
}
void _glfwSetWindowMonitorNull(_GLFWwindow* window,
_GLFWmonitor* monitor,
int xpos, int ypos,
int width, int height,
int refreshRate)
{
if (window->monitor == monitor)
{
if (!monitor)
{
_glfwSetWindowPosNull(window, xpos, ypos);
_glfwSetWindowSizeNull(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
{
_glfwSetWindowPosNull(window, xpos, ypos);
_glfwSetWindowSizeNull(window, width, height);
}
}
void _glfwGetWindowPosNull(_GLFWwindow* window, int* xpos, int* ypos)
{
if (xpos)
*xpos = window->null.xpos;
if (ypos)
*ypos = window->null.ypos;
}
void _glfwSetWindowPosNull(_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 _glfwGetWindowSizeNull(_GLFWwindow* window, int* width, int* height)
{
if (width)
*width = window->null.width;
if (height)
*height = window->null.height;
}
void _glfwSetWindowSizeNull(_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 _glfwSetWindowSizeLimitsNull(_GLFWwindow* window,
int minwidth, int minheight,
int maxwidth, int maxheight)
{
int width = window->null.width;
int height = window->null.height;
applySizeLimits(window, &width, &height);
_glfwSetWindowSizeNull(window, width, height);
}
void _glfwSetWindowAspectRatioNull(_GLFWwindow* window, int n, int d)
{
int width = window->null.width;
int height = window->null.height;
applySizeLimits(window, &width, &height);
_glfwSetWindowSizeNull(window, width, height);
}
void _glfwGetFramebufferSizeNull(_GLFWwindow* window, int* width, int* height)
{
if (width)
*width = window->null.width;
if (height)
*height = window->null.height;
}
void _glfwGetWindowFrameSizeNull(_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 _glfwGetWindowContentScaleNull(_GLFWwindow* window, float* xscale, float* yscale)
{
if (xscale)
*xscale = 1.f;
if (yscale)
*yscale = 1.f;
}
void _glfwIconifyWindowNull(_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 _glfwRestoreWindowNull(_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 _glfwMaximizeWindowNull(_GLFWwindow* window)
{
if (!window->null.maximized)
{
window->null.maximized = GLFW_TRUE;
_glfwInputWindowMaximize(window, GLFW_TRUE);
}
}
int _glfwWindowMaximizedNull(_GLFWwindow* window)
{
return window->null.maximized;
}
int _glfwWindowHoveredNull(_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 _glfwFramebufferTransparentNull(_GLFWwindow* window)
{
return window->null.transparent;
}
void _glfwSetWindowResizableNull(_GLFWwindow* window, GLFWbool enabled)
{
window->null.resizable = enabled;
}
void _glfwSetWindowDecoratedNull(_GLFWwindow* window, GLFWbool enabled)
{
window->null.decorated = enabled;
}
void _glfwSetWindowFloatingNull(_GLFWwindow* window, GLFWbool enabled)
{
window->null.floating = enabled;
}
void _glfwSetWindowMousePassthroughNull(_GLFWwindow* window, GLFWbool enabled)
{
}
float _glfwGetWindowOpacityNull(_GLFWwindow* window)
{
return window->null.opacity;
}
void _glfwSetWindowOpacityNull(_GLFWwindow* window, float opacity)
{
window->null.opacity = opacity;
}
void _glfwSetRawMouseMotionNull(_GLFWwindow *window, GLFWbool enabled)
{
}
GLFWbool _glfwRawMouseMotionSupportedNull(void)
{
return GLFW_TRUE;
}
void _glfwShowWindowNull(_GLFWwindow* window)
{
window->null.visible = GLFW_TRUE;
}
void _glfwRequestWindowAttentionNull(_GLFWwindow* window)
{
}
void _glfwUnhideWindowNull(_GLFWwindow* window)
{
}
void _glfwHideWindowNull(_GLFWwindow* window)
{
if (_glfw.null.focusedWindow == window)
{
_glfw.null.focusedWindow = NULL;
_glfwInputWindowFocus(window, GLFW_FALSE);
}
window->null.visible = GLFW_FALSE;
}
void _glfwFocusWindowNull(_GLFWwindow* window)
{
_GLFWwindow* previous;
if (_glfw.null.focusedWindow == window)
return;
if (!window->null.visible)
return;
previous = _glfw.null.focusedWindow;
_glfw.null.focusedWindow = window;
if (previous)
{
_glfwInputWindowFocus(previous, GLFW_FALSE);
if (previous->monitor && previous->autoIconify)
_glfwIconifyWindowNull(previous);
}
_glfwInputWindowFocus(window, GLFW_TRUE);
}
int _glfwWindowFocusedNull(_GLFWwindow* window)
{
return _glfw.null.focusedWindow == window;
}
int _glfwWindowIconifiedNull(_GLFWwindow* window)
{
return window->null.iconified;
}
int _glfwWindowVisibleNull(_GLFWwindow* window)
{
return window->null.visible;
}
void _glfwPollEventsNull(void)
{
}
void _glfwWaitEventsNull(void)
{
}
void _glfwWaitEventsTimeoutNull(double timeout)
{
}
void _glfwPostEmptyEventNull(void)
{
}
void _glfwGetCursorPosNull(_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 _glfwSetCursorPosNull(_GLFWwindow* window, double x, double y)
{
_glfw.null.xcursor = window->null.xpos + (int) x;
_glfw.null.ycursor = window->null.ypos + (int) y;
}
void _glfwSetCursorModeNull(_GLFWwindow* window, int mode)
{
}
int _glfwCreateCursorNull(_GLFWcursor* cursor,
const GLFWimage* image,
int xhot, int yhot)
{
return GLFW_TRUE;
}
int _glfwCreateStandardCursorNull(_GLFWcursor* cursor, int shape)
{
return GLFW_TRUE;
}
void _glfwDestroyCursorNull(_GLFWcursor* cursor)
{
}
void _glfwSetCursorNull(_GLFWwindow* window, _GLFWcursor* cursor)
{
}
void _glfwSetClipboardStringNull(const char* string)
{
char* copy = _glfw_strdup(string);
_glfw_free(_glfw.null.clipboardString);
_glfw.null.clipboardString = copy;
}
const char* _glfwGetClipboardStringNull(void)
{
return _glfw.null.clipboardString;
}
EGLenum _glfwGetEGLPlatformNull(EGLint** attribs)
{
return 0;
}
EGLNativeDisplayType _glfwGetEGLNativeDisplayNull(void)
{
return 0;
}
EGLNativeWindowType _glfwGetEGLNativeWindowNull(_GLFWwindow* window)
{
return 0;
}
const char* _glfwGetScancodeNameNull(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 _glfwGetKeyScancodeNull(int key)
{
return key;
}
void _glfwGetRequiredInstanceExtensionsNull(char** extensions)
{
}
int _glfwGetPhysicalDevicePresentationSupportNull(VkInstance instance,
VkPhysicalDevice device,
uint32_t queuefamily)
{
return GLFW_FALSE;
}
VkResult _glfwCreateWindowSurfaceNull(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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