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Irlan Robson
401
external/glfw/win32_monitor.c
vendored
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401
external/glfw/win32_monitor.c
vendored
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//========================================================================
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// GLFW 3.3 Win32 - www.glfw.org
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2016 Camilla Berglund <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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#include "internal.h"
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <malloc.h>
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// Create monitor from an adapter and (optionally) a display
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//
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static _GLFWmonitor* createMonitor(DISPLAY_DEVICEW* adapter,
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DISPLAY_DEVICEW* display)
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{
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_GLFWmonitor* monitor;
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char* name;
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HDC dc;
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if (display)
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name = _glfwCreateUTF8FromWideStringWin32(display->DeviceString);
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else
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name = _glfwCreateUTF8FromWideStringWin32(adapter->DeviceString);
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if (!name)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"Win32: Failed to convert string to UTF-8");
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return NULL;
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}
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dc = CreateDCW(L"DISPLAY", adapter->DeviceName, NULL, NULL);
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monitor = _glfwAllocMonitor(name,
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GetDeviceCaps(dc, HORZSIZE),
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GetDeviceCaps(dc, VERTSIZE));
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DeleteDC(dc);
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free(name);
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if (adapter->StateFlags & DISPLAY_DEVICE_MODESPRUNED)
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monitor->win32.modesPruned = GLFW_TRUE;
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wcscpy(monitor->win32.adapterName, adapter->DeviceName);
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WideCharToMultiByte(CP_UTF8, 0,
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adapter->DeviceName, -1,
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monitor->win32.publicAdapterName,
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sizeof(monitor->win32.publicAdapterName),
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NULL, NULL);
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if (display)
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{
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wcscpy(monitor->win32.displayName, display->DeviceName);
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WideCharToMultiByte(CP_UTF8, 0,
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display->DeviceName, -1,
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monitor->win32.publicDisplayName,
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sizeof(monitor->win32.publicDisplayName),
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NULL, NULL);
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}
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return monitor;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Change the current video mode
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//
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GLFWbool _glfwSetVideoModeWin32(_GLFWmonitor* monitor, const GLFWvidmode* desired)
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{
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GLFWvidmode current;
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const GLFWvidmode* best;
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DEVMODEW dm;
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best = _glfwChooseVideoMode(monitor, desired);
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_glfwPlatformGetVideoMode(monitor, ¤t);
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if (_glfwCompareVideoModes(¤t, best) == 0)
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return GLFW_TRUE;
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ZeroMemory(&dm, sizeof(dm));
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dm.dmSize = sizeof(DEVMODEW);
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dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL |
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DM_DISPLAYFREQUENCY;
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dm.dmPelsWidth = best->width;
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dm.dmPelsHeight = best->height;
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dm.dmBitsPerPel = best->redBits + best->greenBits + best->blueBits;
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dm.dmDisplayFrequency = best->refreshRate;
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if (dm.dmBitsPerPel < 15 || dm.dmBitsPerPel >= 24)
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dm.dmBitsPerPel = 32;
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if (ChangeDisplaySettingsExW(monitor->win32.adapterName,
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&dm,
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NULL,
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CDS_FULLSCREEN,
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NULL) != DISP_CHANGE_SUCCESSFUL)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR, "Win32: Failed to set video mode");
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return GLFW_FALSE;
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}
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monitor->win32.modeChanged = GLFW_TRUE;
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return GLFW_TRUE;
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}
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// Restore the previously saved (original) video mode
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//
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void _glfwRestoreVideoModeWin32(_GLFWmonitor* monitor)
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{
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if (monitor->win32.modeChanged)
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{
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ChangeDisplaySettingsExW(monitor->win32.adapterName,
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NULL, NULL, CDS_FULLSCREEN, NULL);
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monitor->win32.modeChanged = GLFW_FALSE;
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}
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW platform API //////
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//////////////////////////////////////////////////////////////////////////
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_GLFWmonitor** _glfwPlatformGetMonitors(int* count)
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{
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int found = 0;
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DWORD adapterIndex, displayIndex, primaryIndex = 0;
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DISPLAY_DEVICEW adapter, display;
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GLFWbool hasDisplays = GLFW_FALSE;
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_GLFWmonitor** monitors = NULL;
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*count = 0;
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// HACK: Check if any active adapters have connected displays
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// If not, this is a headless system or a VMware guest
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for (adapterIndex = 0; ; adapterIndex++)
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{
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ZeroMemory(&adapter, sizeof(DISPLAY_DEVICEW));
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adapter.cb = sizeof(DISPLAY_DEVICEW);
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if (!EnumDisplayDevicesW(NULL, adapterIndex, &adapter, 0))
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break;
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if (!(adapter.StateFlags & DISPLAY_DEVICE_ACTIVE))
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continue;
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ZeroMemory(&display, sizeof(DISPLAY_DEVICEW));
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display.cb = sizeof(DISPLAY_DEVICEW);
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if (EnumDisplayDevicesW(adapter.DeviceName, 0, &display, 0))
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{
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hasDisplays = GLFW_TRUE;
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break;
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}
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}
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for (adapterIndex = 0; ; adapterIndex++)
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{
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ZeroMemory(&adapter, sizeof(DISPLAY_DEVICEW));
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adapter.cb = sizeof(DISPLAY_DEVICEW);
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if (!EnumDisplayDevicesW(NULL, adapterIndex, &adapter, 0))
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break;
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if (!(adapter.StateFlags & DISPLAY_DEVICE_ACTIVE))
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continue;
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if (adapter.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
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primaryIndex = found;
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if (hasDisplays)
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{
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for (displayIndex = 0; ; displayIndex++)
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{
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ZeroMemory(&display, sizeof(DISPLAY_DEVICEW));
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display.cb = sizeof(DISPLAY_DEVICEW);
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if (!EnumDisplayDevicesW(adapter.DeviceName, displayIndex, &display, 0))
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break;
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found++;
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monitors = realloc(monitors, sizeof(_GLFWmonitor*) * found);
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monitors[found - 1] = createMonitor(&adapter, &display);
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}
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}
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else
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{
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found++;
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monitors = realloc(monitors, sizeof(_GLFWmonitor*) * found);
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monitors[found - 1] = createMonitor(&adapter, NULL);
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}
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}
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_GLFW_SWAP_POINTERS(monitors[0], monitors[primaryIndex]);
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*count = found;
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return monitors;
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}
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GLFWbool _glfwPlatformIsSameMonitor(_GLFWmonitor* first, _GLFWmonitor* second)
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{
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if (wcslen(first->win32.displayName))
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return wcscmp(first->win32.displayName, second->win32.displayName) == 0;
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else
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return wcscmp(first->win32.adapterName, second->win32.adapterName) == 0;
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}
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void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
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{
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DEVMODEW settings;
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ZeroMemory(&settings, sizeof(DEVMODEW));
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settings.dmSize = sizeof(DEVMODEW);
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EnumDisplaySettingsExW(monitor->win32.adapterName,
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ENUM_CURRENT_SETTINGS,
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&settings,
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EDS_ROTATEDMODE);
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if (xpos)
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*xpos = settings.dmPosition.x;
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if (ypos)
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*ypos = settings.dmPosition.y;
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}
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GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
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{
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int modeIndex = 0, size = 0;
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GLFWvidmode* result = NULL;
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*count = 0;
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for (;;)
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{
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int i;
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GLFWvidmode mode;
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DEVMODEW dm;
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ZeroMemory(&dm, sizeof(DEVMODEW));
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dm.dmSize = sizeof(DEVMODEW);
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if (!EnumDisplaySettingsW(monitor->win32.adapterName, modeIndex, &dm))
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break;
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modeIndex++;
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// Skip modes with less than 15 BPP
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if (dm.dmBitsPerPel < 15)
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continue;
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mode.width = dm.dmPelsWidth;
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mode.height = dm.dmPelsHeight;
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mode.refreshRate = dm.dmDisplayFrequency;
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_glfwSplitBPP(dm.dmBitsPerPel,
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&mode.redBits,
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&mode.greenBits,
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&mode.blueBits);
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for (i = 0; i < *count; i++)
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{
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if (_glfwCompareVideoModes(result + i, &mode) == 0)
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break;
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}
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// Skip duplicate modes
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if (i < *count)
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continue;
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if (monitor->win32.modesPruned)
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{
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// Skip modes not supported by the connected displays
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if (ChangeDisplaySettingsExW(monitor->win32.adapterName,
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&dm,
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NULL,
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CDS_TEST,
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NULL) != DISP_CHANGE_SUCCESSFUL)
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{
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continue;
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}
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}
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if (*count == size)
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{
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size += 128;
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result = (GLFWvidmode*) realloc(result, size * sizeof(GLFWvidmode));
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}
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(*count)++;
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result[*count - 1] = mode;
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}
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if (!*count)
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{
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// HACK: Report the current mode if no valid modes were found
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result = calloc(1, sizeof(GLFWvidmode));
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_glfwPlatformGetVideoMode(monitor, result);
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*count = 1;
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}
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return result;
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}
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void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
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{
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DEVMODEW dm;
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ZeroMemory(&dm, sizeof(DEVMODEW));
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dm.dmSize = sizeof(DEVMODEW);
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EnumDisplaySettingsW(monitor->win32.adapterName, ENUM_CURRENT_SETTINGS, &dm);
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mode->width = dm.dmPelsWidth;
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mode->height = dm.dmPelsHeight;
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mode->refreshRate = dm.dmDisplayFrequency;
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_glfwSplitBPP(dm.dmBitsPerPel,
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&mode->redBits,
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&mode->greenBits,
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&mode->blueBits);
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}
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void _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp)
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{
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HDC dc;
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WORD values[768];
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dc = CreateDCW(L"DISPLAY", monitor->win32.adapterName, NULL, NULL);
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GetDeviceGammaRamp(dc, values);
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DeleteDC(dc);
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_glfwAllocGammaArrays(ramp, 256);
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memcpy(ramp->red, values + 0, 256 * sizeof(unsigned short));
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memcpy(ramp->green, values + 256, 256 * sizeof(unsigned short));
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memcpy(ramp->blue, values + 512, 256 * sizeof(unsigned short));
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}
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void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
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{
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HDC dc;
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WORD values[768];
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if (ramp->size != 256)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR,
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"Win32: Gamma ramp size must be 256");
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return;
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}
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memcpy(values + 0, ramp->red, 256 * sizeof(unsigned short));
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memcpy(values + 256, ramp->green, 256 * sizeof(unsigned short));
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memcpy(values + 512, ramp->blue, 256 * sizeof(unsigned short));
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dc = CreateDCW(L"DISPLAY", monitor->win32.adapterName, NULL, NULL);
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SetDeviceGammaRamp(dc, values);
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DeleteDC(dc);
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW native API //////
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//////////////////////////////////////////////////////////////////////////
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GLFWAPI const char* glfwGetWin32Adapter(GLFWmonitor* handle)
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{
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_GLFWmonitor* monitor = (_GLFWmonitor*) handle;
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_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
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return monitor->win32.publicAdapterName;
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}
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GLFWAPI const char* glfwGetWin32Monitor(GLFWmonitor* handle)
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{
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_GLFWmonitor* monitor = (_GLFWmonitor*) handle;
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_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
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return monitor->win32.publicDisplayName;
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}
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