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Applied the anti-aliasing modifications to the Linux implementation

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git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1317 4e206d99-4929-0410-ac5d-dfc041789085
This commit is contained in:
laurentgom 2010-01-02 18:37:02 +00:00
parent f2a1ba3cda
commit da44e3d8e5
1 changed files with 40 additions and 54 deletions
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94
src/SFML/Window/Linux/ContextGLX.cpp
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@ -188,59 +188,42 @@ void ContextGLX::CreateContext(ContextGLX* shared, unsigned int bitsPerPixel, co
// Find the best visual
int bestScore = 0xFFFF;
XVisualInfo* bestVisual = NULL;
while (!bestVisual)
for (int i = 0; i < nbVisuals; ++i)
{
for (int i = 0; i < nbVisuals; ++i)
// Get the current visual attributes
int RGBA, doubleBuffer, red, green, blue, alpha, depth, stencil, multiSampling, samples;
glXGetConfig(myDisplay, &visuals[i], GLX_RGBA, &RGBA);
glXGetConfig(myDisplay, &visuals[i], GLX_DOUBLEBUFFER, &doubleBuffer);
glXGetConfig(myDisplay, &visuals[i], GLX_RED_SIZE, &red);
glXGetConfig(myDisplay, &visuals[i], GLX_GREEN_SIZE, &green);
glXGetConfig(myDisplay, &visuals[i], GLX_BLUE_SIZE, &blue);
glXGetConfig(myDisplay, &visuals[i], GLX_ALPHA_SIZE, &alpha);
glXGetConfig(myDisplay, &visuals[i], GLX_DEPTH_SIZE, &depth);
glXGetConfig(myDisplay, &visuals[i], GLX_STENCIL_SIZE, &stencil);
glXGetConfig(myDisplay, &visuals[i], GLX_SAMPLE_BUFFERS_ARB, &multiSampling);
glXGetConfig(myDisplay, &visuals[i], GLX_SAMPLES_ARB, &samples);
// First check the mandatory parameters
if ((RGBA == 0) || (doubleBuffer == 0))
continue;
// Evaluate the current configuration
int color = red + green + blue + alpha;
int score = EvaluateFormat(bitsPerPixel, mySettings, color, depth, stencil, multiSampling ? samples : 0);
// Keep it if it's better than the current best
if (score < bestScore)
{
// Get the current visual attributes
int RGBA, doubleBuffer, red, green, blue, alpha, depth, stencil, multiSampling, samples;
glXGetConfig(myDisplay, &visuals[i], GLX_RGBA, &RGBA);
glXGetConfig(myDisplay, &visuals[i], GLX_DOUBLEBUFFER, &doubleBuffer);
glXGetConfig(myDisplay, &visuals[i], GLX_RED_SIZE, &red);
glXGetConfig(myDisplay, &visuals[i], GLX_GREEN_SIZE, &green);
glXGetConfig(myDisplay, &visuals[i], GLX_BLUE_SIZE, &blue);
glXGetConfig(myDisplay, &visuals[i], GLX_ALPHA_SIZE, &alpha);
glXGetConfig(myDisplay, &visuals[i], GLX_DEPTH_SIZE, &depth);
glXGetConfig(myDisplay, &visuals[i], GLX_STENCIL_SIZE, &stencil);
glXGetConfig(myDisplay, &visuals[i], GLX_SAMPLE_BUFFERS_ARB, &multiSampling);
glXGetConfig(myDisplay, &visuals[i], GLX_SAMPLES_ARB, &samples);
// First check the mandatory parameters
if ((RGBA == 0) || (doubleBuffer == 0))
continue;
// Evaluate the current configuration
int color = red + green + blue + alpha;
int score = EvaluateFormat(bitsPerPixel, mySettings, color, depth, stencil, multiSampling ? samples : 0);
// Keep it if it's better than the current best
if (score < bestScore)
{
bestScore = score;
bestVisual = &visuals[i];
}
bestScore = score;
bestVisual = &visuals[i];
}
}
// If no visual has been found, try a lower level of antialiasing
if (!bestVisual)
{
if (mySettings.AntialiasingLevel > 2)
{
std::cerr << "Failed to find a pixel format supporting "
<< mySettings.AntialiasingLevel << " antialiasing levels ; trying with 2 levels" << std::endl;
mySettings.AntialiasingLevel = 2;
}
else if (mySettings.AntialiasingLevel > 0)
{
std::cerr << "Failed to find a pixel format supporting antialiasing ; antialiasing will be disabled" << std::endl;
mySettings.AntialiasingLevel = 0;
}
else
{
std::cerr << "Failed to find a suitable pixel format for the window -- cannot create OpenGL context" << std::endl;
return;
}
}
// Make sure that we have found a visual
if (!bestVisual)
{
std::cerr << "Failed to find a suitable pixel format for the window -- cannot create OpenGL context" << std::endl;
return;
}
// Get the context to share display lists with
@ -296,11 +279,14 @@ void ContextGLX::CreateContext(ContextGLX* shared, unsigned int bitsPerPixel, co
}
// Update the creation settings from the chosen format
int depth, stencil;
glXGetConfig(myDisplay, bestVisual, GLX_DEPTH_SIZE, &depth);
glXGetConfig(myDisplay, bestVisual, GLX_STENCIL_SIZE, &stencil);
mySettings.DepthBits = static_cast<unsigned int>(depth);
mySettings.StencilBits = static_cast<unsigned int>(stencil);
int depth, stencil, multiSampling, samples;
glXGetConfig(myDisplay, bestVisual, GLX_DEPTH_SIZE, &depth);
glXGetConfig(myDisplay, bestVisual, GLX_STENCIL_SIZE, &stencil);
glXGetConfig(myDisplay, bestVisual, GLX_SAMPLE_BUFFERS_ARB, &multiSampling);
glXGetConfig(myDisplay, bestVisual, GLX_SAMPLES_ARB, &samples);
mySettings.DepthBits = static_cast<unsigned int>(depth);
mySettings.StencilBits = static_cast<unsigned int>(stencil);
mySettings.AntialiasingLevel = multiSampling ? samples : 0;
// Change the target window's colormap so that it matches the context's one
::Window root = RootWindow(myDisplay, DefaultScreen(myDisplay));