53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
#include <mbgl/util/logging.hpp>
|
|
|
|
#include <cassert>
|
|
|
|
#include <mbgl/gl/headless_backend.hpp>
|
|
|
|
#include <GL/osmesa.h>
|
|
|
|
namespace mbgl {
|
|
namespace gl {
|
|
|
|
// This class provides a singleton that contains information about the
|
|
// configuration used for instantiating new headless rendering contexts.
|
|
|
|
class OSMesaBackendImpl final : public HeadlessBackend::Impl {
|
|
public:
|
|
OSMesaBackendImpl() {
|
|
context = OSMesaCreateContextAttribs(std::initializer_list<int>({OSMESA_FORMAT,
|
|
OSMESA_RGBA,
|
|
OSMESA_DEPTH_BITS,
|
|
24,
|
|
OSMESA_STENCIL_BITS,
|
|
8,
|
|
OSMESA_PROFILE,
|
|
OSMESA_COMPAT_PROFILE,
|
|
NULL})
|
|
.begin(),
|
|
NULL);
|
|
}
|
|
|
|
~OSMesaBackendImpl() final { OSMesaDestroyContext(context); }
|
|
|
|
gl::ProcAddress getExtensionFunctionPointer(const char* name) final {
|
|
return (ProcAddress)::OSMesaGetProcAddress(name);
|
|
}
|
|
|
|
void activateContext() final { OSMesaMakeCurrent(context, buffer.get(), GL_UNSIGNED_BYTE, 2048, 2048); }
|
|
|
|
void deactivateContext() final {}
|
|
|
|
private:
|
|
std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(2048 * 2048 * 4);
|
|
OSMesaContext context = NULL;
|
|
};
|
|
|
|
void HeadlessBackend::createImpl() {
|
|
assert(!impl);
|
|
impl = std::make_unique<OSMesaBackendImpl>();
|
|
}
|
|
|
|
} // namespace gl
|
|
} // namespace mbgl
|