|
@@ -464,16 +464,17 @@ void SetupDebugOutput()
|
|
|
/**
|
|
|
* Create and initialize the singleton back-end class.
|
|
|
* @param get_proc Callback to get an OpenGL function from the OS driver.
|
|
|
* @param screen_res Current display resolution.
|
|
|
* @return nullptr on success, error message otherwise.
|
|
|
*/
|
|
|
/* static */ const char *OpenGLBackend::Create(GetOGLProcAddressProc get_proc)
|
|
|
/* static */ const char *OpenGLBackend::Create(GetOGLProcAddressProc get_proc, const Dimension &screen_res)
|
|
|
{
|
|
|
if (OpenGLBackend::instance != nullptr) OpenGLBackend::Destroy();
|
|
|
|
|
|
GetOGLProcAddress = get_proc;
|
|
|
|
|
|
OpenGLBackend::instance = new OpenGLBackend();
|
|
|
return OpenGLBackend::instance->Init();
|
|
|
return OpenGLBackend::instance->Init(screen_res);
|
|
|
}
|
|
|
|
|
|
/**
|
|
@@ -521,9 +522,10 @@ OpenGLBackend::~OpenGLBackend()
|
|
|
|
|
|
/**
|
|
|
* Check for the needed OpenGL functionality and allocate all resources.
|
|
|
* @param screen_res Current display resolution.
|
|
|
* @return Error string or nullptr if successful.
|
|
|
*/
|
|
|
const char *OpenGLBackend::Init()
|
|
|
const char *OpenGLBackend::Init(const Dimension &screen_res)
|
|
|
{
|
|
|
if (!BindBasicInfoProcs()) return "OpenGL not supported";
|
|
|
|
|
@@ -581,6 +583,11 @@ const char *OpenGLBackend::Init()
|
|
|
}
|
|
|
if (this->persistent_mapping_supported) DEBUG(driver, 3, "OpenGL: Using persistent buffer mapping");
|
|
|
|
|
|
/* Check maximum texture size against screen resolution. */
|
|
|
GLint max_tex_size = 0;
|
|
|
_glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_tex_size);
|
|
|
if (std::max(screen_res.width, screen_res.height) > (uint)max_tex_size) return "Max supported texture size is too small";
|
|
|
|
|
|
/* Check available texture units. */
|
|
|
GLint max_tex_units = 0;
|
|
|
_glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_tex_units);
|