TheCloud/panda3d
1
0
Fork 0
mirror of https://github.com/panda3d/panda3d.git synced 2025-10-03 10:22:45 -04:00
Code Issues Packages Projects Releases Wiki Activity

do a better job of choosing the best available pixel format in wgl mode

Browse Source
This commit is contained in:
David Rose 2005-02-28 22:08:15 +00:00
parent 04e18e50b9
commit adfa81dd6c
5 changed files with 463 additions and 333 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
panda/src/display/graphicsPipe.cxx
View File

@ -24,6 +24,42 @@
TypeHandle GraphicsPipe::_type_handle;
// This array keeps the bitmasks of options that we pull out of the
// requested frame_buffer_mode, in order. This is used by derived
// classes to find a suitable pixel format (or fbconfig, or whatever
// the backend calls it) that comes as close as possible to the
// requested configuration.
const int GraphicsPipe::strip_properties[] = {
// One esoteric option removed.
FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stencil,
FrameBufferProperties::FM_accum,
FrameBufferProperties::FM_alpha,
FrameBufferProperties::FM_stereo,
// Two esoteric options removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_accum | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo,
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
// All esoteric options removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
// All esoteric options, plus some we'd really really prefer,
// removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample | FrameBufferProperties::FM_double_buffer,
// A zero marks the end of the array.
0
};
////////////////////////////////////////////////////////////////////
// Function: GraphicsPipe::Constructor
// Access: Protected

2
panda/src/display/graphicsPipe.h
View File

@ -110,6 +110,8 @@ protected:
int _display_height;
PT(GraphicsDevice) _device;
static const int strip_properties[];
public:
static TypeHandle get_class_type() {

61
panda/src/glxdisplay/glxGraphicsPipe.cxx
View File

@ -368,38 +368,6 @@ choose_fbconfig(FrameBufferProperties &properties) const {
// Ok, not good enough. Now try to eliminate options, but keep
// as many bits as we asked for.
// This array keeps the bitmasks of options that we pull out of
// the requested frame_buffer_mode, in order.
static const int strip_properties[] = {
// One esoteric option removed.
FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stencil,
FrameBufferProperties::FM_accum,
FrameBufferProperties::FM_alpha,
FrameBufferProperties::FM_stereo,
// Two esoteric options removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_accum | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo,
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
// All esoteric options removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
// All esoteric options, plus some we'd really really prefer,
// removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample | FrameBufferProperties::FM_double_buffer,
// A zero marks the end of the array.
0
};
pset<int> tried_masks;
tried_masks.insert(frame_buffer_mode);
@ -704,35 +672,6 @@ choose_visual(FrameBufferProperties &properties) const {
// This array keeps the bitmasks of options that we pull out of
// the requested frame_buffer_mode, in order.
static const int strip_properties[] = {
// One esoteric option removed.
FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stencil,
FrameBufferProperties::FM_accum,
FrameBufferProperties::FM_alpha,
FrameBufferProperties::FM_stereo,
// Two esoteric options removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_accum | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo,
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_multisample,
FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
// All esoteric options removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample,
// All esoteric options, plus some we'd really really prefer,
// removed.
FrameBufferProperties::FM_stencil | FrameBufferProperties::FM_accum | FrameBufferProperties::FM_alpha | FrameBufferProperties::FM_stereo | FrameBufferProperties::FM_multisample | FrameBufferProperties::FM_double_buffer,
// A zero marks the end of the array.
0
};
pset<int> tried_masks;
tried_masks.insert(frame_buffer_mode);

677
panda/src/wgldisplay/wglGraphicsPipe.cxx
View File

@ -26,7 +26,6 @@ typedef enum {Software, MCD, ICD} OGLDriverType;
TypeHandle wglGraphicsPipe::_type_handle;
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::Constructor
// Access: Public
@ -111,6 +110,9 @@ make_gsg(const FrameBufferProperties &properties,
if (!gl_force_pixfmt.has_value()) {
temp_pfnum = choose_pfnum(properties, hdc);
if (temp_pfnum == 0) {
return NULL;
}
} else {
wgldisplay_cat.info()
@ -214,18 +216,24 @@ make_buffer(GraphicsStateGuardian *gsg, const string &name,
// Description: Selects a suitable pixel format number for the given
// frame buffer properties. Returns the selected number
// if successful, or 0 otherwise.
//
// If successful, this may modify properties to reflect
// the actual visual chosen.
////////////////////////////////////////////////////////////////////
int wglGraphicsPipe::
choose_pfnum(const FrameBufferProperties &properties, HDC hdc) {
int pfnum;
int frame_buffer_mode = 0;
int mode = properties.get_frame_buffer_mode();
bool hardware = ((mode & FrameBufferProperties::FM_hardware) != 0);
bool software = ((mode & FrameBufferProperties::FM_software) != 0);
if (properties.has_frame_buffer_mode()) {
frame_buffer_mode = properties.get_frame_buffer_mode();
}
int want_depth_bits = properties.get_depth_bits();
int want_color_bits = properties.get_color_bits();
int want_alpha_bits = properties.get_alpha_bits();
int want_stencil_bits = properties.get_stencil_bits();
// We decide these up front, and don't modify them--if the user asks
// for hardware, we never fail over to software.
bool hardware = ((frame_buffer_mode & FrameBufferProperties::FM_hardware) != 0);
bool software = ((frame_buffer_mode & FrameBufferProperties::FM_software) != 0);
// If the user specified neither hardware nor software frame buffer,
// he gets either one.
if (!hardware && !software) {
@ -233,51 +241,300 @@ choose_pfnum(const FrameBufferProperties &properties, HDC hdc) {
software = true;
}
if (hardware) {
pfnum = find_pixfmtnum(properties, hdc, true);
if (pfnum == 0) {
if (software) {
pfnum = find_pixfmtnum(properties, hdc, false);
if (pfnum == 0) {
wgldisplay_cat.error()
<< "Couldn't find HW or Software OpenGL pixfmt appropriate for this desktop!!\n";
} else {
wgldisplay_cat.info()
<< "Couldn't find compatible OGL HW pixelformat, using software rendering.\n";
}
int pfnum =
try_for_pfnum(hdc, hardware, software, frame_buffer_mode,
want_depth_bits, want_color_bits, want_alpha_bits,
want_stencil_bits);
if (pfnum == 0) {
wgldisplay_cat.info()
<< "wglGraphicsPipe::choose_pfnum() - pfnum with requested "
<< "capabilities not found; trying for lesser pfnum.\n";
} else {
wgldisplay_cat.error()
<< "Couldn't find HW-accelerated OpenGL pixfmt appropriate for this desktop!!\n";
bool special_size_request =
(want_depth_bits != 1 || want_color_bits != 1);
// We try to be smart about choosing a close match for the pfnum.
// First, we'll eliminate some of the more esoteric options one at
// a time, then two at a time, and finally we'll try just the bare
// minimum.
if (special_size_request) {
// Actually, first we'll eliminate all of the minimum sizes, to
// try to open a window with all of the requested options, but
// maybe not as many bits in some options as we'd like.
pfnum = try_for_pfnum(hdc, hardware, software, frame_buffer_mode);
}
if (pfnum == 0) {
// Ok, not good enough. Now try to eliminate options, but keep
// as many bits as we asked for.
pset<int> tried_masks;
tried_masks.insert(frame_buffer_mode);
int i;
for (i = 0; pfnum == 0 && strip_properties[i] != 0; i++) {
int new_frame_buffer_mode = frame_buffer_mode & ~strip_properties[i];
if (tried_masks.insert(new_frame_buffer_mode).second) {
pfnum = try_for_pfnum(hdc, hardware, software, new_frame_buffer_mode,
want_depth_bits, want_color_bits,
want_alpha_bits, want_stencil_bits);
}
}
if (special_size_request) {
tried_masks.clear();
tried_masks.insert(frame_buffer_mode);
if (pfnum == 0) {
// Try once more, this time eliminating all of the size
// requests.
for (i = 0; pfnum == 0 && strip_properties[i] != 0; i++) {
int new_frame_buffer_mode = frame_buffer_mode & ~strip_properties[i];
if (tried_masks.insert(new_frame_buffer_mode).second) {
pfnum = try_for_pfnum(hdc, hardware, software,
new_frame_buffer_mode);
}
}
}
}
if (pfnum == 0) {
// Here's our last-ditch desparation attempt: give us any pixel
// format at all!
pfnum = try_for_pfnum(hdc, hardware, software, 0);
}
if (pfnum == 0) {
wgldisplay_cat.error()
<< "make sure OpenGL driver is installed, and try reducing the screen size, reducing the\n"
<< "desktop screen pixeldepth to 16bpp,and check your panda window properties\n";
<< "Could not get any OpenGL pixel format.\n";
return 0;
}
}
} else {
pfnum = find_pixfmtnum(properties, hdc, false);
if (pfnum == 0) {
wgldisplay_cat.error()
<< "Couldn't find compatible software-renderer OpenGL pixfmt, check your window properties!\n";
return 0;
}
}
return pfnum;
}
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::try_for_pfnum
// Access: Private, Static
// Description: Attempt to get the requested pixel format, if it is
// available, using the standard DescribePixelFormat
// call. It returns the pfnum if one is available, or 0
// if no available pixel formats match the requested
// options.
////////////////////////////////////////////////////////////////////
int wglGraphicsPipe::
try_for_pfnum(HDC hdc, bool hardware, bool software, int frame_buffer_mode,
int want_depth_bits, int want_color_bits,
int want_alpha_bits, int want_stencil_bits) {
PIXELFORMATDESCRIPTOR pfd;
ZeroMemory(&pfd,sizeof(PIXELFORMATDESCRIPTOR));
pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
DWORD want_flags = (PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW);
DWORD dont_want_flags = 0;
switch (frame_buffer_mode & FrameBufferProperties::FM_buffer) {
case FrameBufferProperties::FM_single_buffer:
dont_want_flags |= PFD_DOUBLEBUFFER;
break;
case FrameBufferProperties::FM_double_buffer:
case FrameBufferProperties::FM_triple_buffer:
want_flags |= PFD_DOUBLEBUFFER;
break;
}
wgldisplay_cat.debug()
<< "try_for_pfnum(hdc, hardware = " << hardware
<< ", software = " << software
<< ", frame_buffer_mode = 0x" << hex << frame_buffer_mode << dec
<< ", want_depth_bits = " << want_depth_bits
<< ", want_color_bits = " << want_color_bits
<< ", want_alpha_bits = " << want_alpha_bits
<< ", want_stencil_bits = " << want_stencil_bits
<< ")\n";
// We have to call DescribePixelFormat() once just to get the
// highest pfnum available. Then we can iterate through all of the
// pfnums.
int max_pfnum = DescribePixelFormat(hdc, 1, 0, NULL);
int pfnum = 0;
int found_pfnum = 0;
int found_colorbits = 0;
int found_depthbits = 0;
bool found_is_hardware;
for (pfnum = 1; pfnum <= max_pfnum; pfnum++) {
DescribePixelFormat(hdc, pfnum, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
// skip driver types we are not looking for
bool is_hardware = ((pfd.dwFlags & PFD_GENERIC_FORMAT) == 0);
if ((is_hardware && !hardware) || (!is_hardware && !software)) {
continue;
}
if ((pfd.iPixelType == PFD_TYPE_COLORINDEX) &&
(frame_buffer_mode & FrameBufferProperties::FM_index) == 0) {
continue;
}
if ((pfd.dwFlags & want_flags) != want_flags) {
continue;
} else if (pfd.cColorBits < want_color_bits) {
continue;
} else if ((frame_buffer_mode & FrameBufferProperties::FM_alpha) != 0 &&
(pfd.cAlphaBits < want_alpha_bits)) {
continue;
} else if ((frame_buffer_mode & FrameBufferProperties::FM_depth) != 0 &&
(pfd.cDepthBits < want_depth_bits)) {
continue;
} else if ((frame_buffer_mode & FrameBufferProperties::FM_stencil) != 0 &&
(pfd.cStencilBits < want_stencil_bits)) {
continue;
}
// We've passed all the tests; this is an acceptable format. Do
// we prefer this one over the previously-found acceptable
// formats?
bool preferred = false;
if (found_pfnum == 0) {
// If this is the first acceptable format we've found, of course
// we prefer it.
preferred = true;
} else if (!found_is_hardware && is_hardware) {
// We always prefer hardware-supported modes, given a choice.
preferred = true;
} else if ((frame_buffer_mode & FrameBufferProperties::FM_depth) != 0
&& pfd.cDepthBits > found_depthbits) {
// We like having lots of depth bits, to a point.
if (pfd.cColorBits < found_colorbits && found_depthbits >= 16) {
// We don't like sacrificing color bits if we have at least 16
// bits of Z.
} else {
preferred = true;
}
} else if (pfd.cColorBits > found_colorbits) {
// We also like having lots of color bits.
preferred = true;
}
if (preferred) {
found_pfnum = pfnum;
found_colorbits = pfd.cColorBits;
found_depthbits = pfd.cDepthBits;
found_is_hardware = is_hardware;
}
}
if (found_pfnum != 0) {
if (wgldisplay_cat.is_debug()) {
wgldisplay_cat.debug()
<< "found pfnum " << found_pfnum << ":\n";
DescribePixelFormat(hdc, found_pfnum,
sizeof(PIXELFORMATDESCRIPTOR), &pfd);
wgldisplay_cat.debug()
<< " color = " << (int)(pfd.cColorBits)
<< " = R" << (int)(pfd.cRedBits)
<< " G" << (int)(pfd.cGreenBits)
<< " B" << (int)(pfd.cBlueBits)
<< " A" << (int)(pfd.cAlphaBits) << "\n";
if ((frame_buffer_mode & FrameBufferProperties::FM_alpha) != 0) {
wgldisplay_cat.debug()
<< " alpha = " << (int)(pfd.cAlphaBits) << "\n";
}
if ((frame_buffer_mode & FrameBufferProperties::FM_depth) != 0) {
wgldisplay_cat.debug()
<< " depth = " << (int)(pfd.cDepthBits) << "\n";
}
if ((frame_buffer_mode & FrameBufferProperties::FM_stencil) != 0) {
wgldisplay_cat.debug()
<< " stencil = " << (int)(pfd.cStencilBits) << "\n";
}
wgldisplay_cat.debug()
<< " flags = " << format_pfd_flags(pfd.dwFlags) << " (missing "
<< format_pfd_flags((~pfd.dwFlags) & want_flags) << ", extra "
<< format_pfd_flags(pfd.dwFlags & dont_want_flags) << ")\n";
}
}
return found_pfnum;
}
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::get_properties
// Access: Private, Static
// Description: Gets the FrameBufferProperties to match the
// indicated pixel format descriptor.
////////////////////////////////////////////////////////////////////
void wglGraphicsPipe::
get_properties(FrameBufferProperties &properties, HDC hdc,
int pfnum) {
PIXELFORMATDESCRIPTOR pfd;
ZeroMemory(&pfd,sizeof(PIXELFORMATDESCRIPTOR));
pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
DescribePixelFormat(hdc, pfnum, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
properties.clear();
int mode = 0;
if (pfd.dwFlags & PFD_DOUBLEBUFFER) {
mode |= FrameBufferProperties::FM_double_buffer;
}
if (pfd.dwFlags & PFD_STEREO) {
mode |= FrameBufferProperties::FM_stereo;
}
if (pfd.dwFlags & PFD_GENERIC_FORMAT) {
mode |= FrameBufferProperties::FM_software;
} else {
mode |= FrameBufferProperties::FM_hardware;
}
if (pfd.cColorBits != 0) {
mode |= FrameBufferProperties::FM_rgb;
properties.set_color_bits(pfd.cColorBits);
}
if (pfd.cAlphaBits != 0) {
mode |= FrameBufferProperties::FM_alpha;
properties.set_alpha_bits(pfd.cAlphaBits);
}
if (pfd.cDepthBits != 0) {
mode |= FrameBufferProperties::FM_depth;
properties.set_depth_bits(pfd.cDepthBits);
}
if (pfd.cStencilBits != 0) {
mode |= FrameBufferProperties::FM_stencil;
properties.set_stencil_bits(pfd.cStencilBits);
}
properties.set_frame_buffer_mode(mode);
}
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::choose_pfnum_advanced
// Access: Private, Static
// Description: Uses the WGL extensions, if available, to find a
// suitable pfnum. This requires having created a
// temporary context first.
// temporary context first. Returns the pixel format
// chosen if successful, or the original pixel format
// number on failure.
////////////////////////////////////////////////////////////////////
int wglGraphicsPipe::
choose_pfnum_advanced(const FrameBufferProperties &properties,
@ -295,6 +552,101 @@ choose_pfnum_advanced(const FrameBufferProperties &properties,
int want_stencil_bits = properties.get_stencil_bits();
int want_multisamples = properties.get_multisamples();
int pfnum =
try_for_pfnum_advanced(orig_pfnum, wglgsg, window_dc, frame_buffer_mode,
want_depth_bits, want_color_bits, want_alpha_bits,
want_stencil_bits, want_multisamples);
if (pfnum == 0) {
wgldisplay_cat.info()
<< "wglGraphicsPipe::choose_pfnum() - pfnum with requested "
<< "capabilities not found; trying for lesser pfnum.\n";
bool special_size_request =
(want_depth_bits != 1 || want_color_bits != 1);
// We try to be smart about choosing a close match for the pfnum.
// First, we'll eliminate some of the more esoteric options one at
// a time, then two at a time, and finally we'll try just the bare
// minimum.
if (special_size_request) {
// Actually, first we'll eliminate all of the minimum sizes, to
// try to open a window with all of the requested options, but
// maybe not as many bits in some options as we'd like.
pfnum = try_for_pfnum_advanced(orig_pfnum, wglgsg, window_dc,
frame_buffer_mode);
}
if (pfnum == 0) {
// Ok, not good enough. Now try to eliminate options, but keep
// as many bits as we asked for.
pset<int> tried_masks;
tried_masks.insert(frame_buffer_mode);
int i;
for (i = 0; pfnum == 0 && strip_properties[i] != 0; i++) {
int new_frame_buffer_mode = frame_buffer_mode & ~strip_properties[i];
if (tried_masks.insert(new_frame_buffer_mode).second) {
pfnum = try_for_pfnum_advanced(orig_pfnum, wglgsg, window_dc,
new_frame_buffer_mode,
want_depth_bits, want_color_bits,
want_alpha_bits, want_stencil_bits,
want_multisamples);
}
}
if (special_size_request) {
tried_masks.clear();
tried_masks.insert(frame_buffer_mode);
if (pfnum == 0) {
// Try once more, this time eliminating all of the size
// requests.
for (i = 0; pfnum == 0 && strip_properties[i] != 0; i++) {
int new_frame_buffer_mode = frame_buffer_mode & ~strip_properties[i];
if (tried_masks.insert(new_frame_buffer_mode).second) {
pfnum = try_for_pfnum_advanced(orig_pfnum, wglgsg, window_dc,
new_frame_buffer_mode);
}
}
}
}
if (pfnum == 0) {
// Here's our last-ditch desparation attempt: give us any pixel
// format at all!
pfnum = try_for_pfnum_advanced(orig_pfnum, wglgsg, window_dc, 0);
}
if (pfnum == 0) {
// This is only an info message, because we just return the
// original pfnum in this case.
wgldisplay_cat.info()
<< "Could not get any pfnum using wglChoosePixelFormatARB.\n";
return orig_pfnum;
}
}
}
return pfnum;
}
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::try_for_pfnum_advanced
// Access: Private, Static
// Description: Attempt to get the requested pixel format, if it is
// available, using the advanced wglChoosePixelFormatARB
// call. It returns the pfnum if one is available, or 0
// if no available pixel formats match the requested
// options.
////////////////////////////////////////////////////////////////////
int wglGraphicsPipe::
try_for_pfnum_advanced(int orig_pfnum, const wglGraphicsStateGuardian *wglgsg,
HDC window_dc, int frame_buffer_mode,
int want_depth_bits, int want_color_bits,
int want_alpha_bits, int want_stencil_bits,
int want_multisamples) {
static const int max_attrib_list = 32;
int iattrib_list[max_attrib_list];
float fattrib_list[max_attrib_list];
@ -378,7 +730,7 @@ choose_pfnum_advanced(const FrameBufferProperties &properties,
wgldisplay_cat.info()
<< "Couldn't find a suitable advanced pixel format.\n";
}
return orig_pfnum;
return 0;
}
nformats = min(nformats, max_pformats);
@ -395,244 +747,35 @@ choose_pfnum_advanced(const FrameBufferProperties &properties,
}
// If our original pfnum is on the list, take it.
for (unsigned int i = 0; i < nformats; i++) {
unsigned int i;
for (i = 0; i < nformats; i++) {
if (pformat[i] == orig_pfnum) {
return orig_pfnum;
}
}
// Otherwise, return the first available.
// Try to find one on the list that corresponds closely with our
// original pfnum choice.
FrameBufferProperties orig_props;
get_properties(orig_props, window_dc, orig_pfnum);
for (i = 0; i < nformats; i++) {
FrameBufferProperties new_props;
if (get_properties_advanced(new_props, wglgsg, window_dc, pformat[i])) {
if (new_props.get_color_bits() == orig_props.get_color_bits() &&
new_props.get_alpha_bits() == orig_props.get_alpha_bits() &&
new_props.get_depth_bits() == orig_props.get_depth_bits() &&
new_props.get_stencil_bits() == orig_props.get_stencil_bits()) {
return pformat[i];
}
}
}
// Otherwise, just pick the first one on the list, which is the
// "best" one according to WGL.
return pformat[0];
}
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::find_pixfmtnum
// Access: Private, Static
// Description: This helper routine looks for either HW-only or
// SW-only format, but not both. Returns the
// pixelformat number, or 0 if a suitable format could
// not be found.
////////////////////////////////////////////////////////////////////
int wglGraphicsPipe::
find_pixfmtnum(const FrameBufferProperties &properties, HDC hdc,
bool bLookforHW) {
int frame_buffer_mode = properties.get_frame_buffer_mode();
int depth_bits = properties.get_depth_bits();
int color_bits = properties.get_color_bits();
int alpha_bits = properties.get_alpha_bits();
int stencil_bits = properties.get_stencil_bits();
OGLDriverType drvtype;
PIXELFORMATDESCRIPTOR pfd;
ZeroMemory(&pfd,sizeof(PIXELFORMATDESCRIPTOR));
pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
// We have to call DescribePixelFormat() once just to get the
// highest pfnum available. Then we can iterate through all of the
// pfnums.
int max_pfnum = DescribePixelFormat(hdc, 1, 0, NULL);
int cur_bpp = GetDeviceCaps(hdc, BITSPIXEL);
int pfnum = 0;
int found_pfnum = 0;
int found_colorbits = 0;
int found_depthbits = 0;
for (pfnum = 1; pfnum <= max_pfnum; pfnum++) {
DescribePixelFormat(hdc, pfnum, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
// official, nvidia sanctioned way.
if ((pfd.dwFlags & PFD_GENERIC_FORMAT) != 0) {
drvtype = Software;
} else if (pfd.dwFlags & PFD_GENERIC_ACCELERATED) {
drvtype = MCD;
} else {
drvtype = ICD;
}
// skip driver types we are not looking for
if (bLookforHW) {
if (drvtype == Software) {
continue;
}
} else {
if (drvtype != Software) {
continue;
}
}
if ((pfd.iPixelType == PFD_TYPE_COLORINDEX) &&
(frame_buffer_mode & FrameBufferProperties::FM_index) == 0) {
continue;
}
DWORD want_flags = (PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW);
DWORD dont_want_flags = 0;
switch (frame_buffer_mode & FrameBufferProperties::FM_buffer) {
case FrameBufferProperties::FM_single_buffer:
dont_want_flags |= PFD_DOUBLEBUFFER;
break;
case FrameBufferProperties::FM_double_buffer:
case FrameBufferProperties::FM_triple_buffer:
want_flags |= PFD_DOUBLEBUFFER;
break;
}
if (wgldisplay_cat.is_debug()) {
wgldisplay_cat.debug()
<< "---------------- pfnum " << pfnum << "\n";
wgldisplay_cat.debug()
<< "color = " << (int)(pfd.cColorBits)
<< " = R" << (int)(pfd.cRedBits)
<< " G" << (int)(pfd.cGreenBits)
<< " B" << (int)(pfd.cBlueBits)
<< " A" << (int)(pfd.cAlphaBits) << "\n";
if ((frame_buffer_mode & FrameBufferProperties::FM_alpha) != 0) {
wgldisplay_cat.debug()
<< "alpha = " << (int)(pfd.cAlphaBits) << "\n";
}
if ((frame_buffer_mode & FrameBufferProperties::FM_depth) != 0) {
wgldisplay_cat.debug()
<< "depth = " << (int)(pfd.cDepthBits) << "\n";
}
if ((frame_buffer_mode & FrameBufferProperties::FM_stencil) != 0) {
wgldisplay_cat.debug()
<< "stencil = " << (int)(pfd.cStencilBits) << "\n";
}
wgldisplay_cat.debug()
<< "flags = " << format_pfd_flags(pfd.dwFlags) << " (missing "
<< format_pfd_flags((~pfd.dwFlags) & want_flags) << ", extra "
<< format_pfd_flags(pfd.dwFlags & dont_want_flags) << ")\n";
}
if ((frame_buffer_mode & FrameBufferProperties::FM_alpha) != 0 &&
(pfd.cAlphaBits < alpha_bits)) {
wgldisplay_cat.debug()
<< " rejecting.\n";
continue;
}
if ((frame_buffer_mode & FrameBufferProperties::FM_depth) != 0 &&
(pfd.cDepthBits < depth_bits)) {
wgldisplay_cat.debug()
<< " rejecting.\n";
continue;
}
if ((frame_buffer_mode & FrameBufferProperties::FM_stencil) != 0 &&
(pfd.cStencilBits < stencil_bits)) {
wgldisplay_cat.debug()
<< " rejecting.\n";
continue;
}
if ((pfd.dwFlags & want_flags) != want_flags ||
(pfd.dwFlags & dont_want_flags) != 0) {
wgldisplay_cat.debug()
<< " rejecting.\n";
continue;
}
if (pfd.cColorBits < color_bits) {
wgldisplay_cat.debug()
<< " rejecting.\n";
continue;
}
// We've passed all the tests; this is an acceptable format. Do
// we prefer this one over the previously-found acceptable
// formats?
bool preferred = false;
if (found_pfnum == 0) {
// If this is the first acceptable format we've found, of course
// we prefer it.
preferred = true;
} else if ((frame_buffer_mode & FrameBufferProperties::FM_depth) != 0
&& pfd.cDepthBits > found_depthbits) {
// We like having lots of depth bits, to a point.
if (pfd.cColorBits < found_colorbits && found_depthbits >= 16) {
// We don't like sacrificing color bits if we have at least 16
// bits of Z.
} else {
preferred = true;
}
} else if (pfd.cColorBits > found_colorbits) {
// We also like having lots of color bits.
preferred = true;
}
if (preferred) {
wgldisplay_cat.debug()
<< " format is acceptable, and preferred.\n";
found_pfnum = pfnum;
found_colorbits = pfd.cColorBits;
found_depthbits = pfd.cDepthBits;
} else {
wgldisplay_cat.debug()
<< " format is acceptable, but not preferred.\n";
}
}
return found_pfnum;
}
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::get_properties
// Access: Private, Static
// Description: Gets the FrameBufferProperties to match the
// indicated pixel format descriptor.
////////////////////////////////////////////////////////////////////
void wglGraphicsPipe::
get_properties(FrameBufferProperties &properties, HDC hdc,
int pfnum) {
PIXELFORMATDESCRIPTOR pfd;
ZeroMemory(&pfd,sizeof(PIXELFORMATDESCRIPTOR));
pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
DescribePixelFormat(hdc, pfnum, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
properties.clear();
int mode = 0;
if (pfd.dwFlags & PFD_DOUBLEBUFFER) {
mode |= FrameBufferProperties::FM_double_buffer;
}
if (pfd.dwFlags & PFD_STEREO) {
mode |= FrameBufferProperties::FM_stereo;
}
if (pfd.dwFlags & PFD_GENERIC_FORMAT) {
mode |= FrameBufferProperties::FM_software;
} else {
mode |= FrameBufferProperties::FM_hardware;
}
if (pfd.cColorBits != 0) {
mode |= FrameBufferProperties::FM_rgb;
properties.set_color_bits(pfd.cColorBits);
}
if (pfd.cAlphaBits != 0) {
mode |= FrameBufferProperties::FM_alpha;
properties.set_alpha_bits(pfd.cAlphaBits);
}
if (pfd.cDepthBits != 0) {
mode |= FrameBufferProperties::FM_depth;
properties.set_depth_bits(pfd.cDepthBits);
}
if (pfd.cStencilBits != 0) {
mode |= FrameBufferProperties::FM_stencil;
properties.set_stencil_bits(pfd.cStencilBits);
}
properties.set_frame_buffer_mode(mode);
}
////////////////////////////////////////////////////////////////////
// Function: wglGraphicsPipe::get_properties_advanced
// Access: Private, Static
@ -642,7 +785,7 @@ get_properties(FrameBufferProperties &properties, HDC hdc,
////////////////////////////////////////////////////////////////////
bool wglGraphicsPipe::
get_properties_advanced(FrameBufferProperties &properties,
wglGraphicsStateGuardian *wglgsg,
const wglGraphicsStateGuardian *wglgsg,
HDC window_dc, int pfnum) {
static const int max_attrib_list = 32;

20
panda/src/wgldisplay/wglGraphicsPipe.h
View File

@ -48,15 +48,25 @@ protected:
int x_size, int y_size, bool want_texture);
private:
static int choose_pfnum(const FrameBufferProperties &properties, HDC hdc);
static int try_for_pfnum(HDC hdc, bool hardware, bool software,
int frame_buffer_mode,
int want_depth_bits = 1, int want_color_bits = 1,
int want_alpha_bits = 1, int want_stencil_bits = 1);
static void get_properties(FrameBufferProperties &properties, HDC hdc,
int pfnum);
static int choose_pfnum_advanced(const FrameBufferProperties &properties,
const wglGraphicsStateGuardian *wglgsg,
HDC window_dc, int orig_pfnum);
static int find_pixfmtnum(const FrameBufferProperties &properties, HDC hdc,
bool bLookforHW);
static void get_properties(FrameBufferProperties &properties, HDC hdc,
int pfnum);
static int try_for_pfnum_advanced(int orig_pfnum,
const wglGraphicsStateGuardian *wglgsg,
HDC window_dc, int frame_buffer_mode,
int want_depth_bits = 1, int want_color_bits = 1,
int want_alpha_bits = 1, int want_stencil_bits = 1,
int want_multisamples = 1);
static bool get_properties_advanced(FrameBufferProperties &properties,
wglGraphicsStateGuardian *wglgsg,
const wglGraphicsStateGuardian *wglgsg,
HDC window_dc, int pfnum);
static string format_pfd_flags(DWORD pfd_flags);