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// BEGIN_COPYRIGHT
//
// Copyright (C) 1999 Allen Akin All Rights Reserved.
//
// multisample changes: Copyright (c) 2008 VMware, Inc. All rights reserved.
//
// 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 ALLEN AKIN 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.
//
// END_COPYRIGHT
// dsconfig.h: Drawing surface configuration utilities
// This class abstracts the basic characteristics of drawing surfaces
// (size, depth, ancillary buffers, etc.) and operations on them. It
// serves as a wrapper for X11 Visual and FBConfig information on
// X11-based systems, and PixelFormatDescriptor information on
// Win32-based systems.
#ifndef __dsconfig_h__
#define __dsconfig_h__
#include <string>
#include <vector>
#include "glwrap.h"
using namespace std;
namespace GLEAN {
class DrawingSurfaceConfig {
public:
// Constructors/Destructor:
# if defined(__X11__)
DrawingSurfaceConfig(::Display* dpy, ::XVisualInfo* pvi);
# if defined(GLX_VERSION_1_3)
DrawingSurfaceConfig(::Display* dpy, ::GLXFBConfig* pfbc);
# endif
# elif defined(__WIN__)
DrawingSurfaceConfig(int id, ::PIXELFORMATDESCRIPTOR *ppfd);
# elif defined(__BEWIN__)
DrawingSurfaceConfig();
# elif defined(__AGL__)
DrawingSurfaceConfig(int id, ::AGLPixelFormat pfd);
# endif
DrawingSurfaceConfig(string& s); // s is a canonical description
// Exceptions:
struct Error { }; // Base class for errors.
struct Syntax: public Error { // Syntax error in constructor string.
const char* err;
int position;
Syntax(const char* e, int p) {
err = e;
position = p;
}
};
// Attributes:
# if defined(__X11__)
::XVisualInfo* vi; // XVisualInfo pointer
::XID visID; // Visual ID.
# if defined(GLX_VERSION_1_3)
::GLXFBConfig* fbc;
::XID fbcID; // Framebuffer Config ID.
# endif
# elif defined(__WIN__)
::PIXELFORMATDESCRIPTOR *pfd;
int pfdID;
# elif defined(__AGL__)
AGLPixelFormat pf;
int pfID;
# endif
bool canRGBA; // Can be used with RGBA contexts.
bool canCI; // Can be used with color index
// contexts.
int bufSize; // Total depth of color buffer.
int level; // Framebuffer level.
// (<0 for underlay, 0 for main,
// >0 for overlay)
bool db; // True if double buffered.
bool stereo; // True if stereo-capable.
int aux; // Number of aux color buffers.
int r; // Depth of red channel.
int g; // Depth of green channel.
int b; // Depth of blue channel.
int a; // Depth of alpha channel.
int z; // Depth of ``z'' (depth) buffer.
int s; // Depth of stencil buffer.
int accR; // Depth of accum buf red channel.
int accG; // Depth of accum buf green channel.
int accB; // Depth of accum buf blue channel.
int accA; // Depth of accum buf alpha channel.
int samples; // Number of samples per pixel.
// Zero indicates a non-ms config.
bool canWindow; // True if can be used for windows.
# if defined(__X11__)
bool canPixmap; // True if can be used for pixmaps.
# if defined(GLX_VERSION_1_3)
bool canPBuffer; // True if can be used for pbuffers.
int maxPBufferWidth; // Maximum width of PBuffer that
// may be created with this config.
int maxPBufferHeight; // Maximum height of PBuffer that
// may be created with this config.
int maxPBufferPixels; // Maximum size (in pixels) of
// PBuffer that may be created with
// this config.
# endif
# endif
bool canWinSysRender; // True if the native window system
// can render to a drawable created
// with this config.
bool fast; // True if config is probably
// hardware accelerated. (On GLX,
// it must not be marked ``slow.'')
bool conformant; // True if config is advertised as
// conforming to the OpenGL spec.
bool transparent; // True if config has some pixel value
// that is transparent (e.g., for
// overlays).
int transR; // Transparent color red value.
int transG; // Transparent color green value.
int transB; // Transparent color blue value.
int transA; // Transparent color alpha value.
int transI; // Transparent color index value.
// Utilities:
string canonicalDescription();
// Return a string containing all the attributes in a
// drawing surface configuration. This allows the config
// to be stored and recreated (essentially for use by
// configuration-matching algorithms in test result
// comparisons).
string conciseDescription();
// Return a description string that elides default
// attribute values and expresses some attributes in
// compressed form. Intended to be more easily readable
// for humans than the canonical description, at the
// cost of some ambiguity.
int match(vector<DrawingSurfaceConfig*>& choices);
// Find the index of the config from ``choices'' that most
// closely matches the config specified by ``*this''.
// The matching scheme is heuristic, but intended to
// be good enough that test results for configs on one
// machine may be compared with test results for
// configs on another machine.
}; // class DrawingSurfaceConfig
} // namespace GLEAN
#endif // __dsconfig_h__
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