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0022779: Pixel format should be chosen to support stencil buffer

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AGV 2011-10-28 13:49:20 +00:00 committed by bugmaster
parent 6dfe1db18d
commit f7ae443ad8
1 changed files with 60 additions and 20 deletions

80
src/OpenGl/OpenGl_txgl.cxx

@ -199,7 +199,7 @@ __declspec( dllexport ) int __fastcall __OpenGl_INIT__ (
{
XVisualInfo aVisInfo;
int aNbItems;
int isGl, isDoubleBuffer, isRGBA, aDepthSize;
int isGl, isDoubleBuffer, isRGBA, aDepthSize, aStencilSize;
unsigned long aVisInfoMask = VisualIDMask | VisualScreenMask;
aVisInfo.visualid = wattr.visual->visualid;
aVisInfo.screen = DefaultScreen (disp);
@ -219,7 +219,11 @@ __declspec( dllexport ) int __fastcall __OpenGl_INIT__ (
if (glXGetConfig (disp, vis, GLX_DEPTH_SIZE, &aDepthSize) != 0)
aDepthSize = 0;
if (!isGl || !aDepthSize || !isRGBA || isDoubleBuffer != DBuffer)
if (glXGetConfig (disp, vis, GLX_STENCIL_SIZE, &aStencilSize) != 0)
aStencilSize = 0;
if (!isGl || !aDepthSize || !aStencilSize ||
!isRGBA || isDoubleBuffer != DBuffer)
{
XFree (vis);
vis = NULL;
@ -231,12 +235,15 @@ __declspec( dllexport ) int __fastcall __OpenGl_INIT__ (
if (vis == NULL)
{
int anIter = 0;
int anAttribs[11];
int anAttribs[13];
anAttribs[anIter++] = GLX_RGBA;
anAttribs[anIter++] = GLX_DEPTH_SIZE;
anAttribs[anIter++] = 1;
anAttribs[anIter++] = GLX_STENCIL_SIZE;
anAttribs[anIter++] = 1;
anAttribs[anIter++] = GLX_RED_SIZE;
anAttribs[anIter++] = (wattr.depth <= 8) ? 0 : 1;
@ -990,12 +997,14 @@ __declspec( dllexport ) int __fastcall __OpenGl_INIT__ (
{
int iPixelFormat = 0;
int iGood = 0;
int i, j;
int i, j, k;
PIXELFORMATDESCRIPTOR pfd0;
char string[ CALL_DEF_STRING_LENGTH ];
BOOL DBuffer = TRUE;
const int sBits[] = { 8, 1 };
const int cBits[] = { 32, 24 };
const int dBits[] = { 32, 24, 16 };
int goodBits[3] = { 0, 0, 0 };
if (call_util_osd_getenv ("CALL_OPENGL_NO_DBF",
string, CALL_DEF_STRING_LENGTH))
@ -1028,28 +1037,59 @@ __declspec( dllexport ) int __fastcall __OpenGl_INIT__ (
pfd0.dwDamageMask = 0;
hte -> nUsed = 1;
/*
This loop tries to find the pixel format with parameters not worse
than given in sBits, cBits, dBits, giving the priority to color bits
then depth bits, with stencil bits having the lowest priority.
If the needed combination is not found then the iGood value is used, it
is rememebered during the loop as the best ever found combination.
*/
for (i = 0; i < sizeof(dBits) / sizeof(int); i++) {
for (k = 0; k < sizeof(sBits) / sizeof(int); k++) {
pfd0.cDepthBits = dBits[i];
iGood = 0;
for (j = 0; j < sizeof(cBits) / sizeof(int); j++) {
pfd0.cStencilBits = sBits[k];
for (i = 0; i < sizeof(dBits) / sizeof(int); i++) {
pfd0.cColorBits = cBits[j];
iPixelFormat = ChoosePixelFormat ( hte -> hDC, &pfd0 );
pfd0.cDepthBits = dBits[i];
iGood = 0;
for (j = 0; j < sizeof(cBits) / sizeof(int); j++) {
if (iPixelFormat) {
pfd->cDepthBits = 0;
pfd->cColorBits = 0;
DescribePixelFormat (hte -> hDC, iPixelFormat,
sizeof ( PIXELFORMATDESCRIPTOR ), pfd);
if (pfd->cColorBits >= cBits[j] && pfd->cDepthBits >= dBits[i])
break;
if (iGood == 0)
iGood = iPixelFormat;
pfd0.cColorBits = cBits[j];
iPixelFormat = ChoosePixelFormat ( hte -> hDC, &pfd0 );
if (iPixelFormat) {
pfd->cDepthBits = 0;
pfd->cColorBits = 0;
pfd->cStencilBits = 0;
DescribePixelFormat (hte -> hDC, iPixelFormat,
sizeof ( PIXELFORMATDESCRIPTOR ), pfd);
if (pfd->cColorBits >= cBits[j] &&
pfd->cDepthBits >= dBits[i] &&
pfd->cStencilBits >= sBits[k])
break; /* found - stop the lookup immediately */
if (pfd->cColorBits > goodBits[0]) {
goodBits[0] = pfd->cColorBits;
goodBits[1] = pfd->cDepthBits;
goodBits[2] = pfd->cStencilBits;
iGood = iPixelFormat;
} else if (pfd->cColorBits == goodBits[0]) {
if (pfd->cDepthBits > goodBits[1]) {
goodBits[1] = pfd->cDepthBits;
goodBits[2] = pfd->cStencilBits;
iGood = iPixelFormat;
} else if (pfd->cDepthBits == goodBits[1]) {
if (pfd->cStencilBits > goodBits[2]) {
goodBits[2] = pfd->cStencilBits;
iGood = iPixelFormat;
}
}
}
}
}
if (j < sizeof(cBits) / sizeof(int))
break;
}
if (j < sizeof(cBits) / sizeof(int))
if (i < sizeof(dBits) / sizeof(int))
break;
}