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#include "qglxconvenience.h"
#include <QtCore/QVector>
enum {
XFocusOut = FocusOut,
XFocusIn = FocusIn,
XKeyPress = KeyPress,
XKeyRelease = KeyRelease,
XNone = None,
XRevertToParent = RevertToParent,
XGrayScale = GrayScale,
XCursorShape = CursorShape
};
#undef FocusOut
#undef FocusIn
#undef KeyPress
#undef KeyRelease
#undef None
#undef RevertToParent
#undef GrayScale
#undef CursorShape
#ifdef FontChange
#undef FontChange
#endif
QVector<int> buildSpec(const QPlatformWindowFormat &format)
{
QVector<int> spec(48);
int i = 0;
spec[i++] = GLX_LEVEL;
spec[i++] = 0;
spec[i++] = GLX_DRAWABLE_TYPE; spec[i++] = GLX_WINDOW_BIT;
if (format.rgba()) {
spec[i++] = GLX_RENDER_TYPE; spec[i++] = GLX_RGBA_BIT;
spec[i++] = GLX_RED_SIZE; spec[i++] = (format.redBufferSize() == -1) ? 1 : format.redBufferSize();
spec[i++] = GLX_GREEN_SIZE; spec[i++] = (format.greenBufferSize() == -1) ? 1 : format.greenBufferSize();
spec[i++] = GLX_BLUE_SIZE; spec[i++] = (format.blueBufferSize() == -1) ? 1 : format.blueBufferSize();
if (format.alpha()) {
spec[i++] = GLX_ALPHA_SIZE; spec[i++] = (format.alphaBufferSize() == -1) ? 1 : format.alphaBufferSize();
}
spec[i++] = GLX_ACCUM_RED_SIZE; spec[i++] = (format.accumBufferSize() == -1) ? 1 : format.accumBufferSize();
spec[i++] = GLX_ACCUM_GREEN_SIZE; spec[i++] = (format.accumBufferSize() == -1) ? 1 : format.accumBufferSize();
spec[i++] = GLX_ACCUM_BLUE_SIZE; spec[i++] = (format.accumBufferSize() == -1) ? 1 : format.accumBufferSize();
if (format.alpha()) {
spec[i++] = GLX_ACCUM_ALPHA_SIZE; spec[i++] = (format.accumBufferSize() == -1) ? 1 : format.accumBufferSize();
}
} else {
spec[i++] = GLX_RENDER_TYPE; spec[i++] = GLX_COLOR_INDEX_BIT; //I'm really not sure if this works....
spec[i++] = GLX_BUFFER_SIZE; spec[i++] = 8;
}
spec[i++] = GLX_DOUBLEBUFFER; spec[i++] = format.doubleBuffer() ? True : False;
spec[i++] = GLX_STEREO; spec[i++] = format.stereo() ? True : False;
if (format.depth()) {
spec[i++] = GLX_DEPTH_SIZE; spec[i++] = (format.depthBufferSize() == -1) ? 1 : format.depthBufferSize();
}
if (format.stencil()) {
spec[i++] = GLX_STENCIL_SIZE; spec[i++] = (format.stencilBufferSize() == -1) ? 1 : format.stencilBufferSize();
}
if (format.sampleBuffers()) {
spec[i++] = GLX_SAMPLE_BUFFERS_ARB;
spec[i++] = 1;
spec[i++] = GLX_SAMPLES_ARB;
spec[i++] = format.samples() == -1 ? 4 : format.samples();
}
spec[i++] = XNone;
return spec;
}
GLXFBConfig findConfig(Display *display, int screen , const QPlatformWindowFormat &format)
{
bool reduced = true;
GLXFBConfig chosenConfig = 0;
QPlatformWindowFormat reducedFormat = format;
while (!chosenConfig && reduced) {
QVector<int> spec = buildSpec(reducedFormat);
int confcount = 0;
GLXFBConfig *configs;
configs = glXChooseFBConfig(display, screen,spec.constData(),&confcount);
if (confcount)
{
for (int i = 0; i < confcount; i++) {
chosenConfig = configs[i];
// Make sure we try to get an ARGB visual if the format asked for an alpha:
if (reducedFormat.alpha()) {
int alphaSize;
glXGetFBConfigAttrib(display,configs[i],GLX_ALPHA_SIZE,&alphaSize);
if (alphaSize > 0)
break;
} else {
break; // Just choose the first in the list if there's no alpha requested
}
}
XFree(configs);
}
reducedFormat = reducePlatformWindowFormat(reducedFormat,&reduced);
}
if (!chosenConfig)
qWarning("Warning no context created");
return chosenConfig;
}
XVisualInfo *findVisualInfo(Display *display, int screen, const QPlatformWindowFormat &format)
{
GLXFBConfig config = findConfig(display,screen,format);
XVisualInfo *visualInfo = glXGetVisualFromFBConfig(display,config);
return visualInfo;
}
QPlatformWindowFormat platformWindowFromGLXFBConfig(Display *display, GLXFBConfig config, GLXContext ctx)
{
QPlatformWindowFormat format;
int redSize = 0;
int greenSize = 0;
int blueSize = 0;
int alphaSize = 0;
int depthSize = 0;
int stencilSize = 0;
int sampleBuffers = 0;
int sampleCount = 0;
int level = 0;
int rgba = 0;
int stereo = 0;
int accumSizeA = 0;
int accumSizeR = 0;
int accumSizeG = 0;
int accumSizeB = 0;
XVisualInfo *vi = glXGetVisualFromFBConfig(display,config);
glXGetConfig(display,vi,GLX_RGBA,&rgba);
XFree(vi);
glXGetFBConfigAttrib(display, config, GLX_RED_SIZE, &redSize);
glXGetFBConfigAttrib(display, config, GLX_GREEN_SIZE, &greenSize);
glXGetFBConfigAttrib(display, config, GLX_BLUE_SIZE, &blueSize);
glXGetFBConfigAttrib(display, config, GLX_ALPHA_SIZE, &alphaSize);
glXGetFBConfigAttrib(display, config, GLX_DEPTH_SIZE, &depthSize);
glXGetFBConfigAttrib(display, config, GLX_STENCIL_SIZE, &stencilSize);
glXGetFBConfigAttrib(display, config, GLX_SAMPLES, &sampleBuffers);
glXGetFBConfigAttrib(display, config, GLX_LEVEL, &level);
glXGetFBConfigAttrib(display, config, GLX_STEREO, &stereo);
glXGetFBConfigAttrib(display, config, GLX_ACCUM_ALPHA_SIZE, &accumSizeA);
glXGetFBConfigAttrib(display, config, GLX_ACCUM_RED_SIZE, &accumSizeR);
glXGetFBConfigAttrib(display, config, GLX_ACCUM_GREEN_SIZE, &accumSizeG);
glXGetFBConfigAttrib(display, config, GLX_ACCUM_BLUE_SIZE, &accumSizeB);
format.setRedBufferSize(redSize);
format.setGreenBufferSize(greenSize);
format.setBlueBufferSize(blueSize);
format.setAlphaBufferSize(alphaSize);
format.setDepthBufferSize(depthSize);
format.setStencilBufferSize(stencilSize);
format.setSampleBuffers(sampleBuffers);
if (format.sampleBuffers()) {
glXGetFBConfigAttrib(display, config, GLX_SAMPLES_ARB, &sampleCount);
format.setSamples(sampleCount);
}
format.setDirectRendering(glXIsDirect(display, ctx));
format.setRgba(rgba);
format.setStereo(stereo);
format.setAccumBufferSize(accumSizeB);
return format;
}
QPlatformWindowFormat reducePlatformWindowFormat(const QPlatformWindowFormat &format, bool *reduced)
{
QPlatformWindowFormat retFormat = format;
*reduced = true;
if (retFormat.sampleBuffers()) {
retFormat.setSampleBuffers(false);
} else if (retFormat.stereo()) {
retFormat.setStereo(false);
} else if (retFormat.accum()) {
retFormat.setAccum(false);
}else if (retFormat.stencil()) {
retFormat.setStencil(false);
}else if (retFormat.alpha()) {
retFormat.setAlpha(false);
}else if (retFormat.depth()) {
retFormat.setDepth(false);
}else if (retFormat.doubleBuffer()) {
retFormat.setDoubleBuffer(false);
}else{
*reduced = false;
}
return retFormat;
}
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