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