gwm17/glfw
1
0
Fork 0
mirror of https://github.com/gwm17/glfw.git synced 2024-10-08 23:27:25 -04:00
Code Issues Projects Releases Wiki Activity
glfw/src/x11_monitor.c
Camilla Berglund 6a4c175816 Made client-side RandR and Xf86VidMode required.
2013-01-12 19:23:53 +01:00

421 lines
12 KiB
C
Raw Blame History

//========================================================================
// GLFW - An OpenGL library
// Platform: X11 (Unix)
// API version: 3.0
// WWW: http://www.glfw.org/
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.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 <limits.h>
#include <stdlib.h>
#include <string.h>
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Finds the video mode closest in size to the specified desired size
//========================================================================
int _glfwGetClosestVideoMode(_GLFWmonitor* monitor, int* width, int* height)
{
int i, match, bestmatch;
if (_glfw.x11.randr.available)
{
int sizecount, bestsize;
XRRScreenConfiguration* sc;
XRRScreenSize* sizelist;
sc = XRRGetScreenInfo(_glfw.x11.display, _glfw.x11.root);
sizelist = XRRConfigSizes(sc, &sizecount);
// Find the best matching mode
bestsize = -1;
bestmatch = INT_MAX;
for (i = 0; i < sizecount; i++)
{
match = (*width - sizelist[i].width) *
(*width - sizelist[i].width) +
(*height - sizelist[i].height) *
(*height - sizelist[i].height);
if (match < bestmatch)
{
bestmatch = match;
bestsize = i;
}
}
if (bestsize != -1)
{
// Report width & height of best matching mode
*width = sizelist[bestsize].width;
*height = sizelist[bestsize].height;
}
XRRFreeScreenConfigInfo(sc);
if (bestsize != -1)
return bestsize;
}
// Default: Simply use the screen resolution
*width = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
*height = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
return 0;
}
//========================================================================
// Change the current video mode
//========================================================================
void _glfwSetVideoModeMODE(_GLFWmonitor* monitor, int mode)
{
if (_glfw.x11.randr.available)
{
XRRScreenConfiguration* sc;
Window root;
root = _glfw.x11.root;
sc = XRRGetScreenInfo(_glfw.x11.display, root);
// Remember old size and flag that we have changed the mode
if (!monitor->x11.modeChanged)
{
monitor->x11.oldSizeID = XRRConfigCurrentConfiguration(sc, &monitor->x11.oldRotation);
monitor->x11.oldWidth = DisplayWidth(_glfw.x11.display,
_glfw.x11.screen);
monitor->x11.oldHeight = DisplayHeight(_glfw.x11.display,
_glfw.x11.screen);
monitor->x11.modeChanged = GL_TRUE;
}
XRRSetScreenConfig(_glfw.x11.display,
sc,
root,
mode,
RR_Rotate_0,
CurrentTime);
XRRFreeScreenConfigInfo(sc);
}
}
//========================================================================
// Change the current video mode
//========================================================================
void _glfwSetVideoMode(_GLFWmonitor* monitor, int* width, int* height)
{
int bestmode;
// Find a best match mode
bestmode = _glfwGetClosestVideoMode(monitor, width, height);
// Change mode
_glfwSetVideoModeMODE(monitor, bestmode);
}
//========================================================================
// Restore the previously saved (original) video mode
//========================================================================
void _glfwRestoreVideoMode(_GLFWmonitor* monitor)
{
if (!monitor->x11.modeChanged)
return;
if (_glfw.x11.randr.available)
{
XRRScreenConfiguration* sc;
sc = XRRGetScreenInfo(_glfw.x11.display, _glfw.x11.root);
XRRSetScreenConfig(_glfw.x11.display,
sc,
_glfw.x11.root,
monitor->x11.oldSizeID,
monitor->x11.oldRotation,
CurrentTime);
XRRFreeScreenConfigInfo(sc);
}
monitor->x11.modeChanged = GL_FALSE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Return a list of available monitors
//========================================================================
_GLFWmonitor** _glfwPlatformGetMonitors(int* found)
{
_GLFWmonitor** monitors = NULL;
*found = 0;
if (_glfw.x11.randr.available)
{
int i;
RROutput primary;
XRRScreenResources* sr;
sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
primary = XRRGetOutputPrimary(_glfw.x11.display, _glfw.x11.root);
monitors = (_GLFWmonitor**) calloc(sr->noutput, sizeof(_GLFWmonitor*));
if (!monitors)
{
XRRFreeScreenResources(sr);
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
for (i = 0; i < sr->noutput; i++)
{
XRROutputInfo* oi;
XRRCrtcInfo* ci;
oi = XRRGetOutputInfo(_glfw.x11.display, sr, sr->outputs[i]);
if (oi->connection != RR_Connected)
{
XRRFreeOutputInfo(oi);
continue;
}
ci = XRRGetCrtcInfo(_glfw.x11.display, sr, oi->crtc);
monitors[*found] = _glfwCreateMonitor(oi->name,
sr->outputs[i] == primary,
oi->mm_width, oi->mm_height,
ci->x, ci->y);
XRRFreeCrtcInfo(ci);
if (!monitors[*found])
{
// TODO: wat
return NULL;
}
// This is retained until the monitor object is destroyed
monitors[*found]->x11.output = oi;
(*found)++;
}
}
else
{
int widthMM, heightMM;
monitors = (_GLFWmonitor**) calloc(1, sizeof(_GLFWmonitor*));
if (!monitors)
{
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
widthMM = DisplayWidthMM(_glfw.x11.display, _glfw.x11.screen);
heightMM = DisplayHeightMM(_glfw.x11.display, _glfw.x11.screen);
monitors[0] = _glfwCreateMonitor("Display",
GL_TRUE,
widthMM, heightMM,
0, 0);
*found = 1;
}
return monitors;
}
//========================================================================
// Destroy a monitor struct
//========================================================================
void _glfwPlatformDestroyMonitor(_GLFWmonitor* monitor)
{
if (_glfw.x11.randr.available)
XRRFreeOutputInfo(monitor->x11.output);
}
//========================================================================
// List available video modes
//========================================================================
GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* found)
{
GLFWvidmode* result;
int depth, r, g, b;
depth = DefaultDepth(_glfw.x11.display, _glfw.x11.screen);
_glfwSplitBPP(depth, &r, &g, &b);
*found = 0;
// Build array of available resolutions
if (_glfw.x11.randr.available)
{
XRRScreenResources* sr;
int i, j, count = monitor->x11.output->nmode;
sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
result = (GLFWvidmode*) malloc(sizeof(GLFWvidmode) * count);
if (!result)
{
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
for (i = 0; i < count; i++)
{
GLFWvidmode mode;
for (j = 0; j < sr->nmode; j++)
{
if (sr->modes[j].id == monitor->x11.output->modes[i])
break;
}
if (j == sr->nmode)
continue;
mode.width = sr->modes[j].width;
mode.height = sr->modes[j].height;
for (j = 0; j < *found; j++)
{
if (result[j].width == mode.width &&
result[j].height == mode.height)
{
break;
}
}
if (j < *found)
{
// This is a duplicate, so skip it
continue;
}
mode.redBits = r;
mode.greenBits = g;
mode.blueBits = b;
result[*found] = mode;
(*found)++;
}
XRRFreeScreenResources(sr);
}
else
{
*found = 1;
result = (GLFWvidmode*) malloc(sizeof(GLFWvidmode));
if (!result)
{
_glfwInputError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
result[0].width = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
result[0].height = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
result[0].redBits = r;
result[0].greenBits = g;
result[0].blueBits = b;
}
return result;
}
//========================================================================
// Get the current video mode for the specified monitor
//========================================================================
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
{
if (_glfw.x11.randr.available)
{
XRRScreenResources* sr;
XRRCrtcInfo* ci;
sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
if (!sr)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Failed to retrieve RandR screen resources");
return;
}
ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.output->crtc);
if (!ci)
{
XRRFreeScreenResources(sr);
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Failed to retrieve RandR crtc info");
return;
}
mode->width = ci->width;
mode->height = ci->height;
XRRFreeCrtcInfo(ci);
XRRFreeScreenResources(sr);
}
else
{
mode->width = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
mode->height = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
}
_glfwSplitBPP(DefaultDepth(_glfw.x11.display, _glfw.x11.screen),
&mode->redBits, &mode->greenBits, &mode->blueBits);
}
Reference in New Issue View Git Blame Copy Permalink