--- /dev/null
+/*
+ * freeglut_state_x11.c
+ *
+ * X11-specific freeglut state query methods.
+ *
+ * Copyright (c) 2012 Stephen J. Baker. All Rights Reserved.
+ * Written by John F. Fay, <fayjf@sourceforge.net>
+ * Creation date: Sat Feb 4 2012
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <GL/freeglut.h>
+#include "../fg_internal.h"
+
+/*
+ * TODO BEFORE THE STABLE RELEASE:
+ *
+ * fgPlatformChooseFBConfig() -- OK, but what about glutInitDisplayString()?
+ */
+
+/* A helper function to check if a display mode is possible to use */
+GLXFBConfig* fgPlatformChooseFBConfig( int* numcfgs );
+
+/*
+ * Queries the GL context about some attributes
+ */
+int fgPlatformGetConfig( int attribute )
+{
+ int returnValue = 0;
+ int result; /* Not checked */
+
+ if( fgStructure.CurrentWindow )
+ result = glXGetFBConfigAttrib( fgDisplay.pDisplay.Display,
+ *(fgStructure.CurrentWindow->Window.pContext.FBConfig),
+ attribute,
+ &returnValue );
+
+ return returnValue;
+}
+
+int fgPlatformGlutGet ( GLenum eWhat )
+{
+ int nsamples = 0;
+
+ switch( eWhat )
+ {
+ /*
+ * The window/context specific queries are handled mostly by
+ * fgPlatformGetConfig().
+ */
+ case GLUT_WINDOW_NUM_SAMPLES:
+#ifdef GLX_VERSION_1_3
+ glGetIntegerv(GL_SAMPLES, &nsamples);
+#endif
+ return nsamples;
+
+ /*
+ * The rest of GLX queries under X are general enough to use a macro to
+ * check them
+ */
+# define GLX_QUERY(a,b) case a: return fgPlatformGetConfig( b );
+
+ GLX_QUERY( GLUT_WINDOW_RGBA, GLX_RGBA );
+ GLX_QUERY( GLUT_WINDOW_DOUBLEBUFFER, GLX_DOUBLEBUFFER );
+ GLX_QUERY( GLUT_WINDOW_BUFFER_SIZE, GLX_BUFFER_SIZE );
+ GLX_QUERY( GLUT_WINDOW_STENCIL_SIZE, GLX_STENCIL_SIZE );
+ GLX_QUERY( GLUT_WINDOW_DEPTH_SIZE, GLX_DEPTH_SIZE );
+ GLX_QUERY( GLUT_WINDOW_RED_SIZE, GLX_RED_SIZE );
+ GLX_QUERY( GLUT_WINDOW_GREEN_SIZE, GLX_GREEN_SIZE );
+ GLX_QUERY( GLUT_WINDOW_BLUE_SIZE, GLX_BLUE_SIZE );
+ GLX_QUERY( GLUT_WINDOW_ALPHA_SIZE, GLX_ALPHA_SIZE );
+ GLX_QUERY( GLUT_WINDOW_ACCUM_RED_SIZE, GLX_ACCUM_RED_SIZE );
+ GLX_QUERY( GLUT_WINDOW_ACCUM_GREEN_SIZE, GLX_ACCUM_GREEN_SIZE );
+ GLX_QUERY( GLUT_WINDOW_ACCUM_BLUE_SIZE, GLX_ACCUM_BLUE_SIZE );
+ GLX_QUERY( GLUT_WINDOW_ACCUM_ALPHA_SIZE, GLX_ACCUM_ALPHA_SIZE );
+ GLX_QUERY( GLUT_WINDOW_STEREO, GLX_STEREO );
+
+# undef GLX_QUERY
+
+ /* Colormap size is handled in a bit different way than all the rest */
+ case GLUT_WINDOW_COLORMAP_SIZE:
+ if( (fgPlatformGetConfig( GLX_RGBA )) || (fgStructure.CurrentWindow == NULL) )
+ {
+ /*
+ * We've got a RGBA visual, so there is no colormap at all.
+ * The other possibility is that we have no current window set.
+ */
+ return 0;
+ }
+ else
+ {
+ const GLXFBConfig * fbconfig =
+ fgStructure.CurrentWindow->Window.pContext.FBConfig;
+
+ XVisualInfo * visualInfo =
+ glXGetVisualFromFBConfig( fgDisplay.pDisplay.Display, *fbconfig );
+
+ const int result = visualInfo->visual->map_entries;
+
+ XFree(visualInfo);
+
+ return result;
+ }
+
+ /*
+ * Those calls are somewhat similiar, as they use XGetWindowAttributes()
+ * function
+ */
+ case GLUT_WINDOW_X:
+ case GLUT_WINDOW_Y:
+ case GLUT_WINDOW_BORDER_WIDTH:
+ case GLUT_WINDOW_HEADER_HEIGHT:
+ {
+ int x, y;
+ Window w;
+
+ if( fgStructure.CurrentWindow == NULL )
+ return 0;
+
+ XTranslateCoordinates(
+ fgDisplay.pDisplay.Display,
+ fgStructure.CurrentWindow->Window.Handle,
+ fgDisplay.pDisplay.RootWindow,
+ 0, 0, &x, &y, &w);
+
+ switch ( eWhat )
+ {
+ case GLUT_WINDOW_X: return x;
+ case GLUT_WINDOW_Y: return y;
+ }
+
+ if ( w == 0 )
+ return 0;
+ XTranslateCoordinates(
+ fgDisplay.pDisplay.Display,
+ fgStructure.CurrentWindow->Window.Handle,
+ w, 0, 0, &x, &y, &w);
+
+ switch ( eWhat )
+ {
+ case GLUT_WINDOW_BORDER_WIDTH: return x;
+ case GLUT_WINDOW_HEADER_HEIGHT: return y;
+ }
+ }
+
+ case GLUT_WINDOW_WIDTH:
+ case GLUT_WINDOW_HEIGHT:
+ {
+ XWindowAttributes winAttributes;
+
+ if( fgStructure.CurrentWindow == NULL )
+ return 0;
+ XGetWindowAttributes(
+ fgDisplay.pDisplay.Display,
+ fgStructure.CurrentWindow->Window.Handle,
+ &winAttributes
+ );
+ switch ( eWhat )
+ {
+ case GLUT_WINDOW_WIDTH: return winAttributes.width ;
+ case GLUT_WINDOW_HEIGHT: return winAttributes.height ;
+ }
+ }
+
+ /* I do not know yet if there will be a fgChooseVisual() function for Win32 */
+ case GLUT_DISPLAY_MODE_POSSIBLE:
+ {
+ /* We should not have to call fgPlatformChooseFBConfig again here. */
+ GLXFBConfig * fbconfig;
+ int isPossible;
+
+ fbconfig = fgPlatformChooseFBConfig(NULL);
+
+ if (fbconfig == NULL)
+ {
+ isPossible = 0;
+ }
+ else
+ {
+ isPossible = 1;
+ XFree(fbconfig);
+ }
+
+ return isPossible;
+ }
+
+ /* This is system-dependant */
+ case GLUT_WINDOW_FORMAT_ID:
+ if( fgStructure.CurrentWindow == NULL )
+ return 0;
+
+ return fgPlatformGetConfig( GLX_VISUAL_ID );
+
+ default:
+ fgWarning( "glutGet(): missing enum handle %d", eWhat );
+ break;
+ }
+
+ return -1;
+}
+
+
+int fgPlatformGlutDeviceGet ( GLenum eWhat )
+{
+ switch( eWhat )
+ {
+ case GLUT_HAS_KEYBOARD:
+ /*
+ * X11 has a core keyboard by definition, although it can
+ * be present as a virtual/dummy keyboard. For now, there
+ * is no reliable way to tell if a real keyboard is present.
+ */
+ return 1;
+
+ /* X11 has a mouse by definition */
+ case GLUT_HAS_MOUSE:
+ return 1 ;
+
+ case GLUT_NUM_MOUSE_BUTTONS:
+ /* We should be able to pass NULL when the last argument is zero,
+ * but at least one X server has a bug where this causes a segfault.
+ *
+ * In XFree86/Xorg servers, a mouse wheel is seen as two buttons
+ * rather than an Axis; "freeglut_main.c" expects this when
+ * checking for a wheel event.
+ */
+ {
+ unsigned char map;
+ int nbuttons = XGetPointerMapping(fgDisplay.pDisplay.Display, &map,0);
+ return nbuttons;
+ }
+
+ default:
+ fgWarning( "glutDeviceGet(): missing enum handle %d", eWhat );
+ break;
+ }
+
+ /* And now -- the failure. */
+ return -1;
+}
+
+
+int *fgPlatformGlutGetModeValues(GLenum eWhat, int *size)
+{
+ int *array;
+
+ int attributes[9];
+ GLXFBConfig * fbconfigArray; /* Array of FBConfigs */
+ int fbconfigArraySize; /* Number of FBConfigs in the array */
+ int attribute_name = 0;
+
+ array = NULL;
+ *size = 0;
+
+ switch (eWhat)
+ {
+ case GLUT_AUX:
+ case GLUT_MULTISAMPLE:
+
+ attributes[0] = GLX_BUFFER_SIZE;
+ attributes[1] = GLX_DONT_CARE;
+
+ switch (eWhat)
+ {
+ case GLUT_AUX:
+ /*
+ FBConfigs are now sorted by increasing number of auxiliary
+ buffers. We want at least one buffer.
+ */
+ attributes[2] = GLX_AUX_BUFFERS;
+ attributes[3] = 1;
+ attributes[4] = None;
+
+ attribute_name = GLX_AUX_BUFFERS;
+
+ break;
+
+
+ case GLUT_MULTISAMPLE:
+ attributes[2] = GLX_AUX_BUFFERS;
+ attributes[3] = GLX_DONT_CARE;
+ attributes[4] = GLX_SAMPLE_BUFFERS;
+ attributes[5] = 1;
+ /*
+ FBConfigs are now sorted by increasing number of samples per
+ pixel. We want at least one sample.
+ */
+ attributes[6] = GLX_SAMPLES;
+ attributes[7] = 1;
+ attributes[8] = None;
+
+ attribute_name = GLX_SAMPLES;
+
+ break;
+ }
+
+ fbconfigArray = glXChooseFBConfig(fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ attributes,
+ &fbconfigArraySize);
+
+ if (fbconfigArray != NULL)
+ {
+ int * temp_array;
+ int result; /* Returned by glXGetFBConfigAttrib. Not checked. */
+ int previous_value;
+ int i;
+
+ temp_array = malloc(sizeof(int) * fbconfigArraySize);
+ previous_value = 0;
+
+ for (i = 0; i < fbconfigArraySize; i++)
+ {
+ int value;
+
+ result = glXGetFBConfigAttrib(fgDisplay.pDisplay.Display,
+ fbconfigArray[i],
+ attribute_name,
+ &value);
+ if (value > previous_value)
+ {
+ temp_array[*size] = value;
+ previous_value = value;
+ (*size)++;
+ }
+ }
+
+ array = malloc(sizeof(int) * (*size));
+ for (i = 0; i < *size; i++)
+ {
+ array[i] = temp_array[i];
+ }
+
+ free(temp_array);
+ XFree(fbconfigArray);
+ }
+
+ break;
+
+ default:
+ break;
+ }
+
+ return array;
+}
+
+
projects / freeglut / blobdiff