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Set the default number of samples per pixel to 4 and actually use the value set

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with glutSetOption(GLUT_MULTISAMPLE,...) in Windows code. Previously the Windows
code used a hardwired value of 4 and the GLX code had a default of 0, neither
made much sense. Similarly, set the default number of auxiliary buffers to 1 and
use that value when GLUT_AUX is used. Note: There latter token has the same
value as GLUT_AUX1, and for historical reasons we seem to have 2 APIs to set the
number of auxiliary buffers: Explicitly using GLUT_AUX1 ... GLUT_AUX4, and using
a combination of GLUT_AUX with glutSetOption. The default of 1 ensures
consistent behaviour in both cases.


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@802 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
spanne 2009-03-16 17:53:54 +00:00
parent 26495e19b9
commit 7d3a0c3623
3 changed files with 32 additions and 13 deletions
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11
freeglut/freeglut/ChangeLog
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@ -1,5 +1,16 @@
2009-03-16 Sven Panne <sven.panne@aedion.de> 2009-03-16 Sven Panne <sven.panne@aedion.de>
* src/freeglut_init.c,src/freeglut_window.c: Set the default number of
samples per pixel to 4 and actually use the value set with
glutSetOption(GLUT_MULTISAMPLE,...) in Windows code. Previously the
Windows code used a hardwired value of 4 and the GLX code had a
default of 0, neither made much sense. Similarly, set the default
number of auxiliary buffers to 1 and use that value when GLUT_AUX is
used. Note: There latter token has the same value as GLUT_AUX1, and
for historical reasons we seem to have 2 APIs to set the number of
auxiliary buffers: Explicitly using GLUT_AUX1 ... GLUT_AUX4, and using
a combination of GLUT_AUX with glutSetOption. The default of 1 ensures
consistent behaviour in both cases.
* src/freeglut_state.c: Added GLUT_AUX and GLUT_MULTISAMPLE as possible * src/freeglut_state.c: Added GLUT_AUX and GLUT_MULTISAMPLE as possible
parameters for glutGet, making things more symmetric with parameters for glutGet, making things more symmetric with
glutSetOption. glutSetOption.

4
freeglut/freeglut/src/freeglut_init.c
View File

@ -84,8 +84,8 @@ SFG_State fgState = { { -1, -1, GL_FALSE }, /* Position */
NULL, /* ProgramName */ NULL, /* ProgramName */
GL_FALSE, /* JoysticksInitialised */ GL_FALSE, /* JoysticksInitialised */
GL_FALSE, /* InputDevsInitialised */ GL_FALSE, /* InputDevsInitialised */
0, /* AuxiliaryBufferNumber */ 1, /* AuxiliaryBufferNumber */
0, /* SampleNumber */ 4, /* SampleNumber */
1, /* MajorVersion */ 1, /* MajorVersion */
0, /* MajorVersion */ 0, /* MajorVersion */
0 /* ContextFlags */ 0 /* ContextFlags */

30
freeglut/freeglut/src/freeglut_window.c
View File

@ -132,14 +132,22 @@ GLXFBConfig* fgChooseFBConfig( void )
ATTRIB_VAL( GLX_ACCUM_ALPHA_SIZE, 1 ); ATTRIB_VAL( GLX_ACCUM_ALPHA_SIZE, 1 );
} }
if ((fgState.DisplayMode & GLUT_AUX) if( fgState.DisplayMode & GLUT_AUX4 )
|| (fgState.DisplayMode & GLUT_AUX1) {
|| (fgState.DisplayMode & GLUT_AUX2) ATTRIB_VAL(GLX_AUX_BUFFERS, 4);
|| (fgState.DisplayMode & GLUT_AUX3) }
|| (fgState.DisplayMode & GLUT_AUX4)) else if( fgState.DisplayMode & GLUT_AUX3 )
{ {
ATTRIB_VAL(GLX_AUX_BUFFERS, fgState.AuxiliaryBufferNumber) ATTRIB_VAL(GLX_AUX_BUFFERS, 3);
} }
else if( fgState.DisplayMode & GLUT_AUX2 )
{
ATTRIB_VAL(GLX_AUX_BUFFERS, 2);
}
else if( fgState.DisplayMode & GLUT_AUX1 ) /* NOTE: Same as GLUT_AUX! */
{
ATTRIB_VAL(GLX_AUX_BUFFERS, fgState.AuxiliaryBufferNumber);
}
if (fgState.DisplayMode & GLUT_MULTISAMPLE) if (fgState.DisplayMode & GLUT_MULTISAMPLE)
{ {
@ -427,8 +435,8 @@ GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
pfd.cAuxBuffers = 3; pfd.cAuxBuffers = 3;
else if( fgState.DisplayMode & GLUT_AUX2 ) else if( fgState.DisplayMode & GLUT_AUX2 )
pfd.cAuxBuffers = 2; pfd.cAuxBuffers = 2;
else if( fgState.DisplayMode & GLUT_AUX1 ) else if( fgState.DisplayMode & GLUT_AUX1 ) /* NOTE: Same as GLUT_AUX! */
pfd.cAuxBuffers = 1; pfd.cAuxBuffers = fgState.AuxiliaryBufferNumber;
else else
pfd.cAuxBuffers = 0; pfd.cAuxBuffers = 0;
@ -497,7 +505,7 @@ GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
pAttributes[iCounter++]=WGL_DOUBLE_BUFFER_ARB; pAttributes[iCounter++]=(fgState.DisplayMode & GLUT_DOUBLE)!=0; pAttributes[iCounter++]=WGL_DOUBLE_BUFFER_ARB; pAttributes[iCounter++]=(fgState.DisplayMode & GLUT_DOUBLE)!=0;
pAttributes[iCounter++]=WGL_SAMPLE_BUFFERS_ARB; pAttributes[iCounter++]=GL_TRUE; pAttributes[iCounter++]=WGL_SAMPLE_BUFFERS_ARB; pAttributes[iCounter++]=GL_TRUE;
pAttributes[iCounter++]=WGL_SAMPLES_ARB; pAttributes[iCounter++]=4; pAttributes[iCounter++]=WGL_SAMPLES_ARB; pAttributes[iCounter++]=fgState.SampleNumber;
pAttributes[iCounter++]=0; pAttributes[iCounter++]=0; /* terminator */ pAttributes[iCounter++]=0; pAttributes[iCounter++]=0; /* terminator */
bValid = wglChoosePixelFormatARBProc(window->Window.Device,pAttributes,fAttributes,1,&iPixelFormat,&numFormats); bValid = wglChoosePixelFormatARBProc(window->Window.Device,pAttributes,fAttributes,1,&iPixelFormat,&numFormats);