44 lines
1.8 KiB
C
44 lines
1.8 KiB
C
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// utilities for transfroming options between TWAIN and sane ...
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//
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// Date: 2022-04-14
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//
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#pragma once
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#include <sane/sane_ex.h>
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#include <string>
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class sane_helper
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{
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std::string dll_root_;
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HMODULE dll_handle_ = nullptr;
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void clear(void);
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public:
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SANE_Status (*invoke_sane_init) (SANE_Int * version_code, SANE_Auth_Callback authorize) = nullptr;
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SANE_Status (*invoke_sane_init_ex)(SANE_Int* version_code, sane_callback cb, void* param) = nullptr;
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void (*invoke_sane_exit) (void) = nullptr;
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SANE_Status (*invoke_sane_get_devices) (const SANE_Device *** device_list, SANE_Bool local_only) = nullptr;
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SANE_Status (*invoke_sane_open) (SANE_String_Const devicename, SANE_Handle * handle) = nullptr;
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void (*invoke_sane_close) (SANE_Handle handle) = nullptr;
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const SANE_Option_Descriptor* (*invoke_sane_get_option_descriptor) (SANE_Handle handle, SANE_Int option) = nullptr;
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SANE_Status (*invoke_sane_control_option) (SANE_Handle handle, SANE_Int option, SANE_Action action, void *value, SANE_Int * info) = nullptr;
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SANE_Status (*invoke_sane_get_parameters) (SANE_Handle handle, SANE_Parameters * params) = nullptr;
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SANE_Status (*invoke_sane_start) (SANE_Handle handle) = nullptr;
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SANE_Status (*invoke_sane_read) (SANE_Handle handle, SANE_Byte * data, SANE_Int max_length, SANE_Int * length) = nullptr;
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void (*invoke_sane_cancel) (SANE_Handle handle) = nullptr;
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SANE_Status (*invoke_sane_set_io_mode) (SANE_Handle handle, SANE_Bool non_blocking) = nullptr;
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SANE_Status (*invoke_sane_get_select_fd) (SANE_Handle handle, SANE_Int * fd) = nullptr;
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SANE_String_Const (*invoke_sane_strstatus) (SANE_Status status) = nullptr;
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public:
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sane_helper();
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~sane_helper();
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bool load_sane(const char* vendor); // libsane_hgsane.so.1, and vendor is 'hgsane'
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};
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extern sane_helper* sane_helper_;
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