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/**************************************************************************
*
* Copyright 2011 Jose Fonseca
* 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 THE
* AUTHORS OR COPYRIGHT HOLDERS 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.
*
**************************************************************************/
/*
* Abstraction for GL window system specific APIs (GLX, WGL).
*/
#pragma once
#include <assert.h>
#include <vector>
#include <string>
#include "glfeatures.hpp"
namespace glws {
using glfeatures::Profile;
class Drawable;
bool
checkExtension(const char *extName, const char *extString);
// Extra info for creating PBuffers
struct pbuffer_info
{
int texFormat; // GL_RGB, GL_RGBA, or GL_NONE
int texTarget; // GL_TEXTURE_1D/2D/CUBE_MAP or GL_NONE
bool texMipmap; // 0 or 1 (false/true)
Drawable *hdc_drawable; // Needed for WGL Pbuffers
};
template< class T >
class Attributes {
protected:
std::vector<T> attribs;
public:
void add(T param) {
attribs.push_back(param);
}
void add(T pname, T pvalue) {
add(pname);
add(pvalue);
}
void end(T terminator = 0) {
add(terminator);
}
operator T * (void) {
return &attribs[0];
}
operator const T * (void) const {
return &attribs[0];
}
};
class Visual
{
public:
Profile profile;
/* TODO */
#if 0
unsigned long redMask;
unsigned long greenMask;
unsigned long blueMask;
unsigned long alphaMask;
#endif
bool doubleBuffer;
Visual(Profile prof) :
profile(prof)
{}
virtual ~Visual() {}
};
class Drawable
{
public:
const Visual *visual;
int width;
int height;
bool pbuffer;
bool visible;
// For WGL_ARB_render_texture
glws::pbuffer_info pbInfo;
int mipmapLevel, cubeFace;
Drawable(const Visual *vis, int w, int h, bool pb) :
visual(vis),
width(w),
height(h),
pbuffer(pb),
visible(false),
mipmapLevel(0),
cubeFace(0)
{}
virtual ~Drawable() {}
virtual void
resize(int w, int h) {
width = w;
height = h;
}
virtual void
show(void) {
assert(!pbuffer);
visible = true;
}
virtual void copySubBuffer(int x, int y, int width, int height);
virtual void swapBuffers(void) = 0;
};
class Context
{
public:
const Visual *visual;
// Requested profile
Profile profile;
// Created profile
Profile actualProfile;
glfeatures::Extensions actualExtensions;
glfeatures::Features actualFeatures;
Context(const Visual *vis) :
visual(vis),
profile(vis->profile),
actualProfile(profile),
initialized(false)
{}
virtual ~Context() {}
// Context must have been made current once
inline bool
hasExtension(const char *extension) const {
assert(initialized);
return actualExtensions.has(extension);
}
private:
bool initialized;
void initialize(void);
friend bool makeCurrent(Drawable *, Context *);
};
void
init(void);
void
cleanup(void);
Visual *
createVisual(bool doubleBuffer, unsigned samples, Profile profile);
Drawable *
createDrawable(const Visual *visual, int width, int height,
const glws::pbuffer_info *pbInfo = NULL);
Context *
createContext(const Visual *visual, Context *shareContext = 0, bool debug = false);
bool
makeCurrentInternal(Drawable *drawable, Context *context);
inline bool
makeCurrent(Drawable *drawable, Context *context)
{
bool success = makeCurrentInternal(drawable, context);
if (success && context && !context->initialized) {
context->initialize();
}
return success;
}
bool
processEvents(void);
// iBuffer is one of GL_FRONT/BACK_LEFT/RIGHT, GL_AUX0...
bool
bindTexImage(Drawable *pBuffer, int iBuffer);
// iBuffer is one of GL_FRONT/BACK_LEFT/RIGHT, GL_AUX0...
bool
releaseTexImage(Drawable *pBuffer, int iBuffer);
bool
setPbufferAttrib(Drawable *pBuffer, const int *attribList);
} /* namespace glws */
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