SkMesaGLContext::SkMesaGLContext()
: fContext(static_cast<Context>(NULL))
, fImage(NULL) {
GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext));
/* Create an RGBA-mode context */
#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
/* specify Z, stencil, accum sizes */
fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, NULL);
#else
fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, NULL);
#endif
if (!fContext) {
SkDebugf("OSMesaCreateContext failed!\n");
this->destroyGLContext();
return;
}
// Allocate the image buffer
fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE *
4 * sizeof(GrGLubyte));
if (!fImage) {
SkDebugf("Alloc image buffer failed!\n");
this->destroyGLContext();
return;
}
// Bind the buffer to the context and make it current
if (!OSMesaMakeCurrent((OSMesaContext)fContext,
fImage,
GR_GL_UNSIGNED_BYTE,
gBOGUS_SIZE,
gBOGUS_SIZE)) {
SkDebugf("OSMesaMakeCurrent failed!\n");
this->destroyGLContext();
return;
}
SkAutoTUnref<const GrGLInterface> gl(GrGLCreateMesaInterface());
if (NULL == gl.get()) {
SkDebugf("Could not create GL interface!\n");
this->destroyGLContext();
return;
}
if (!gl->validate()) {
SkDebugf("Could not validate GL interface!\n");
this->destroyGLContext();
return;
}
this->init(gl.detach());
}
const GrGLInterface* SkMesaGLContext::createGLContext() {
/* Create an RGBA-mode context */
#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
/* specify Z, stencil, accum sizes */
fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, NULL);
#else
fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, NULL);
#endif
if (!fContext) {
SkDebugf("OSMesaCreateContext failed!\n");
this->destroyGLContext();
return NULL;
}
// Allocate the image buffer
fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE *
4 * sizeof(GrGLubyte));
if (!fImage) {
SkDebugf("Alloc image buffer failed!\n");
this->destroyGLContext();
return NULL;
}
// Bind the buffer to the context and make it current
if (!OSMesaMakeCurrent((OSMesaContext)fContext,
fImage,
GR_GL_UNSIGNED_BYTE,
gBOGUS_SIZE,
gBOGUS_SIZE)) {
SkDebugf("OSMesaMakeCurrent failed!\n");
this->destroyGLContext();
return NULL;
}
const GrGLInterface* interface = GrGLCreateMesaInterface();
if (!interface) {
SkDebugf("Could not create GL interface!\n");
this->destroyGLContext();
return NULL;
}
return interface;
}
