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glfw/src/win32_monitor.c
Camilla Löwy 1d75b205cb Cleanup 
Allow window creation despite video mode setting failure.

Video mode setting failure is ignored the rest of the time and the
desired video mode has never been a hard constraint anyway.
2018-02-07 16:46:58 +01:00

510 lines
15 KiB
C
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//========================================================================
// GLFW 3.3 Win32 - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2016 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.
//
//========================================================================
#include "internal.h"
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <malloc.h>
// Callback for EnumDisplayMonitors in createMonitor
//
static BOOL CALLBACK monitorCallback(HMONITOR handle,
HDC dc,
RECT* rect,
LPARAM data)
{
MONITORINFOEXW mi;
ZeroMemory(&mi, sizeof(mi));
mi.cbSize = sizeof(mi);
if (GetMonitorInfoW(handle, (MONITORINFO*) &mi))
{
_GLFWmonitor* monitor = (_GLFWmonitor*) data;
if (wcscmp(mi.szDevice, monitor->win32.adapterName) == 0)
monitor->win32.handle = handle;
}
return TRUE;
}
// Create monitor from an adapter and (optionally) a display
//
static _GLFWmonitor* createMonitor(DISPLAY_DEVICEW* adapter,
DISPLAY_DEVICEW* display)
{
_GLFWmonitor* monitor;
int widthMM, heightMM;
char* name;
HDC dc;
DEVMODEW dm;
RECT rect;
if (display)
name = _glfwCreateUTF8FromWideStringWin32(display->DeviceString);
else
name = _glfwCreateUTF8FromWideStringWin32(adapter->DeviceString);
if (!name)
return NULL;
ZeroMemory(&dm, sizeof(dm));
dm.dmSize = sizeof(dm);
EnumDisplaySettingsW(adapter->DeviceName, ENUM_CURRENT_SETTINGS, &dm);
dc = CreateDCW(L"DISPLAY", adapter->DeviceName, NULL, NULL);
if (IsWindows8Point1OrGreater())
{
widthMM = GetDeviceCaps(dc, HORZSIZE);
heightMM = GetDeviceCaps(dc, VERTSIZE);
}
else
{
widthMM = (int) (dm.dmPelsWidth * 25.4f / GetDeviceCaps(dc, LOGPIXELSX));
heightMM = (int) (dm.dmPelsHeight * 25.4f / GetDeviceCaps(dc, LOGPIXELSY));
}
DeleteDC(dc);
monitor = _glfwAllocMonitor(name, widthMM, heightMM);
free(name);
if (adapter->StateFlags & DISPLAY_DEVICE_MODESPRUNED)
monitor->win32.modesPruned = GLFW_TRUE;
wcscpy(monitor->win32.adapterName, adapter->DeviceName);
WideCharToMultiByte(CP_UTF8, 0,
adapter->DeviceName, -1,
monitor->win32.publicAdapterName,
sizeof(monitor->win32.publicAdapterName),
NULL, NULL);
if (display)
{
wcscpy(monitor->win32.displayName, display->DeviceName);
WideCharToMultiByte(CP_UTF8, 0,
display->DeviceName, -1,
monitor->win32.publicDisplayName,
sizeof(monitor->win32.publicDisplayName),
NULL, NULL);
}
rect.left = dm.dmPosition.x;
rect.top = dm.dmPosition.y;
rect.right = dm.dmPosition.x + dm.dmPelsWidth;
rect.bottom = dm.dmPosition.y + dm.dmPelsHeight;
EnumDisplayMonitors(NULL, &rect, monitorCallback, (LPARAM) monitor);
return monitor;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
// Poll for changes in the set of connected monitors
//
void _glfwPollMonitorsWin32(void)
{
int i, disconnectedCount;
_GLFWmonitor** disconnected = NULL;
DWORD adapterIndex, displayIndex;
DISPLAY_DEVICEW adapter, display;
_GLFWmonitor* monitor;
disconnectedCount = _glfw.monitorCount;
if (disconnectedCount)
{
disconnected = calloc(_glfw.monitorCount, sizeof(_GLFWmonitor*));
memcpy(disconnected,
_glfw.monitors,
_glfw.monitorCount * sizeof(_GLFWmonitor*));
}
for (adapterIndex = 0; ; adapterIndex++)
{
int type = _GLFW_INSERT_LAST;
ZeroMemory(&adapter, sizeof(adapter));
adapter.cb = sizeof(adapter);
if (!EnumDisplayDevicesW(NULL, adapterIndex, &adapter, 0))
break;
if (!(adapter.StateFlags & DISPLAY_DEVICE_ACTIVE))
continue;
if (adapter.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
type = _GLFW_INSERT_FIRST;
for (displayIndex = 0; ; displayIndex++)
{
ZeroMemory(&display, sizeof(display));
display.cb = sizeof(display);
if (!EnumDisplayDevicesW(adapter.DeviceName, displayIndex, &display, 0))
break;
if (!(display.StateFlags & DISPLAY_DEVICE_ACTIVE))
continue;
for (i = 0; i < disconnectedCount; i++)
{
if (disconnected[i] &&
wcscmp(disconnected[i]->win32.displayName,
display.DeviceName) == 0)
{
disconnected[i] = NULL;
break;
}
}
if (i < disconnectedCount)
continue;
monitor = createMonitor(&adapter, &display);
if (!monitor)
{
free(disconnected);
return;
}
_glfwInputMonitor(monitor, GLFW_CONNECTED, type);
type = _GLFW_INSERT_LAST;
}
// HACK: If an active adapter does not have any display devices
// (as sometimes happens), add it directly as a monitor
if (displayIndex == 0)
{
for (i = 0; i < disconnectedCount; i++)
{
if (disconnected[i] &&
wcscmp(disconnected[i]->win32.adapterName,
adapter.DeviceName) == 0)
{
disconnected[i] = NULL;
break;
}
}
if (i < disconnectedCount)
continue;
monitor = createMonitor(&adapter, NULL);
if (!monitor)
{
free(disconnected);
return;
}
_glfwInputMonitor(monitor, GLFW_CONNECTED, type);
}
}
for (i = 0; i < disconnectedCount; i++)
{
if (disconnected[i])
_glfwInputMonitor(disconnected[i], GLFW_DISCONNECTED, 0);
}
free(disconnected);
}
// Change the current video mode
//
void _glfwSetVideoModeWin32(_GLFWmonitor* monitor, const GLFWvidmode* desired)
{
GLFWvidmode current;
const GLFWvidmode* best;
DEVMODEW dm;
LONG result;
best = _glfwChooseVideoMode(monitor, desired);
_glfwPlatformGetVideoMode(monitor, &current);
if (_glfwCompareVideoModes(&current, best) == 0)
return;
ZeroMemory(&dm, sizeof(dm));
dm.dmSize = sizeof(dm);
dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL |
DM_DISPLAYFREQUENCY;
dm.dmPelsWidth = best->width;
dm.dmPelsHeight = best->height;
dm.dmBitsPerPel = best->redBits + best->greenBits + best->blueBits;
dm.dmDisplayFrequency = best->refreshRate;
if (dm.dmBitsPerPel < 15 || dm.dmBitsPerPel >= 24)
dm.dmBitsPerPel = 32;
result = ChangeDisplaySettingsExW(monitor->win32.adapterName,
&dm,
NULL,
CDS_FULLSCREEN,
NULL);
if (result == DISP_CHANGE_SUCCESSFUL)
monitor->win32.modeChanged = GLFW_TRUE;
else
{
const char* description = "Unknown error";
if (result == DISP_CHANGE_BADDUALVIEW)
description = "The system uses DualView";
else if (result == DISP_CHANGE_BADFLAGS)
description = "Invalid flags";
else if (result == DISP_CHANGE_BADMODE)
description = "Graphics mode not supported";
else if (result == DISP_CHANGE_BADPARAM)
description = "Invalid parameter";
else if (result == DISP_CHANGE_FAILED)
description = "Graphics mode failed";
else if (result == DISP_CHANGE_NOTUPDATED)
description = "Failed to write to registry";
else if (result == DISP_CHANGE_RESTART)
description = "Computer restart required";
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32: Failed to set video mode: %s",
description);
}
}
// Restore the previously saved (original) video mode
//
void _glfwRestoreVideoModeWin32(_GLFWmonitor* monitor)
{
if (monitor->win32.modeChanged)
{
ChangeDisplaySettingsExW(monitor->win32.adapterName,
NULL, NULL, CDS_FULLSCREEN, NULL);
monitor->win32.modeChanged = GLFW_FALSE;
}
}
void _glfwGetMonitorContentScaleWin32(HMONITOR handle, float* xscale, float* yscale)
{
UINT xdpi, ydpi;
if (IsWindows8Point1OrGreater())
GetDpiForMonitor(handle, MDT_EFFECTIVE_DPI, &xdpi, &ydpi);
else
{
const HDC dc = GetDC(NULL);
xdpi = GetDeviceCaps(dc, LOGPIXELSX);
ydpi = GetDeviceCaps(dc, LOGPIXELSY);
ReleaseDC(NULL, dc);
}
if (xscale)
*xscale = xdpi / 96.f;
if (yscale)
*yscale = ydpi / 96.f;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
{
DEVMODEW dm;
ZeroMemory(&dm, sizeof(dm));
dm.dmSize = sizeof(dm);
EnumDisplaySettingsExW(monitor->win32.adapterName,
ENUM_CURRENT_SETTINGS,
&dm,
EDS_ROTATEDMODE);
if (xpos)
*xpos = dm.dmPosition.x;
if (ypos)
*ypos = dm.dmPosition.y;
}
void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
float* xscale, float* yscale)
{
_glfwGetMonitorContentScaleWin32(monitor->win32.handle, xscale, yscale);
}
GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
{
int modeIndex = 0, size = 0;
GLFWvidmode* result = NULL;
*count = 0;
for (;;)
{
int i;
GLFWvidmode mode;
DEVMODEW dm;
ZeroMemory(&dm, sizeof(dm));
dm.dmSize = sizeof(dm);
if (!EnumDisplaySettingsW(monitor->win32.adapterName, modeIndex, &dm))
break;
modeIndex++;
// Skip modes with less than 15 BPP
if (dm.dmBitsPerPel < 15)
continue;
mode.width = dm.dmPelsWidth;
mode.height = dm.dmPelsHeight;
mode.refreshRate = dm.dmDisplayFrequency;
_glfwSplitBPP(dm.dmBitsPerPel,
&mode.redBits,
&mode.greenBits,
&mode.blueBits);
for (i = 0; i < *count; i++)
{
if (_glfwCompareVideoModes(result + i, &mode) == 0)
break;
}
// Skip duplicate modes
if (i < *count)
continue;
if (monitor->win32.modesPruned)
{
// Skip modes not supported by the connected displays
if (ChangeDisplaySettingsExW(monitor->win32.adapterName,
&dm,
NULL,
CDS_TEST,
NULL) != DISP_CHANGE_SUCCESSFUL)
{
continue;
}
}
if (*count == size)
{
size += 128;
result = (GLFWvidmode*) realloc(result, size * sizeof(GLFWvidmode));
}
(*count)++;
result[*count - 1] = mode;
}
if (!*count)
{
// HACK: Report the current mode if no valid modes were found
result = calloc(1, sizeof(GLFWvidmode));
_glfwPlatformGetVideoMode(monitor, result);
*count = 1;
}
return result;
}
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
{
DEVMODEW dm;
ZeroMemory(&dm, sizeof(dm));
dm.dmSize = sizeof(dm);
EnumDisplaySettingsW(monitor->win32.adapterName, ENUM_CURRENT_SETTINGS, &dm);
mode->width = dm.dmPelsWidth;
mode->height = dm.dmPelsHeight;
mode->refreshRate = dm.dmDisplayFrequency;
_glfwSplitBPP(dm.dmBitsPerPel,
&mode->redBits,
&mode->greenBits,
&mode->blueBits);
}
void _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp)
{
HDC dc;
WORD values[768];
dc = CreateDCW(L"DISPLAY", monitor->win32.adapterName, NULL, NULL);
GetDeviceGammaRamp(dc, values);
DeleteDC(dc);
_glfwAllocGammaArrays(ramp, 256);
memcpy(ramp->red, values + 0, 256 * sizeof(unsigned short));
memcpy(ramp->green, values + 256, 256 * sizeof(unsigned short));
memcpy(ramp->blue, values + 512, 256 * sizeof(unsigned short));
}
void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
{
HDC dc;
WORD values[768];
if (ramp->size != 256)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32: Gamma ramp size must be 256");
return;
}
memcpy(values + 0, ramp->red, 256 * sizeof(unsigned short));
memcpy(values + 256, ramp->green, 256 * sizeof(unsigned short));
memcpy(values + 512, ramp->blue, 256 * sizeof(unsigned short));
dc = CreateDCW(L"DISPLAY", monitor->win32.adapterName, NULL, NULL);
SetDeviceGammaRamp(dc, values);
DeleteDC(dc);
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI const char* glfwGetWin32Adapter(GLFWmonitor* handle)
{
_GLFWmonitor* monitor = (_GLFWmonitor*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
return monitor->win32.publicAdapterName;
}
GLFWAPI const char* glfwGetWin32Monitor(GLFWmonitor* handle)
{
_GLFWmonitor* monitor = (_GLFWmonitor*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
return monitor->win32.publicDisplayName;
}
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