llwindowmesaheadless.cpp

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#if LL_MESA_HEADLESS

#include "linden_common.h"
#include "indra_constants.h"

#include "llwindowmesaheadless.h"
#include "llgl.h"
#include "llglheaders.h"

#define MESA_CHANNEL_TYPE GL_UNSIGNED_SHORT
#define MESA_CHANNEL_SIZE 2

U16 *gMesaBuffer = NULL;

//
// LLWindowMesaHeadless
//
LLWindowMesaHeadless::LLWindowMesaHeadless(char *title, char *name, S32 x, S32 y, S32 width, S32 height,
                                                         U32 flags,  BOOL fullscreen, BOOL clearBg,
                                                         BOOL disable_vsync, BOOL use_gl, BOOL ignore_pixel_depth, S32 stereo_mode)
        : LLWindow(fullscreen, flags)
{
        if (use_gl)
        {
                llinfos << "MESA Init" << llendl;
                mMesaContext = OSMesaCreateContextExt( GL_RGBA, 32, 0, 0, NULL );

                /* Allocate the image buffer */
                mMesaBuffer = new unsigned char [width * height * 4 * MESA_CHANNEL_SIZE];
                llassert(mMesaBuffer);

                gMesaBuffer = (U16*)mMesaBuffer;

                /* Bind the buffer to the context and make it current */
                if (!OSMesaMakeCurrent( mMesaContext, mMesaBuffer, MESA_CHANNEL_TYPE, width, height ))
                {
                        llerrs << "MESA: OSMesaMakeCurrent failed!" << llendl;
                }

                llverify(gGLManager.initGL());
        }
}


LLWindowMesaHeadless::~LLWindowMesaHeadless()
{
        delete mMesaBuffer;
        OSMesaDestroyContext( mMesaContext );
}

void LLWindowMesaHeadless::swapBuffers()
{
        glFinish();
}

#endif

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