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https://github.com/holub/mame
synced 2025-06-04 11:56:28 +03:00
ec80428647
The things that were previously called device iterators are not iterators in the C++ sense of the word. This is confusing for newcomers. These have been renamed to be device enumerators. Several Lua methods and properties that previously returned tables now return lightweight wrappers for the underlying objects. This means creating them is a lot faster, but you can't modify them, and the performance characteristics of different operations varies. The render manager's target list uses 1-based indexing to be more like idiomatic Lua. It's now possible to create a device enumerator on any device, and then get subdevices (or sibling devices) using a relative tag. Much more render/layout functionality has been exposed to Lua. Layout scripts now have access to the layout file and can directly set the state of an item with no bindings, or register callbacks to obtain state. Some things that were previously methods are now read-only properties. Layout files are no longer required to supply a "name". This was problematic because the same layout file could be loaded for multiple instances of the same device, and each instance of the layout file should use the correct inputs (and in the future outputs) for the device instance it's associated with. This should also fix video output with MSVC builds by avoiding delegates that return things that don't fit in a register.
75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Aaron Giles
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/***************************************************************************
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divideo.h
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Device video interfaces.
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***************************************************************************/
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#pragma once
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#ifndef __EMU_H__
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#error Dont include this file directly; include emu.h instead.
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#endif
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#ifndef MAME_EMU_DIVIDEO_H
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#define MAME_EMU_DIVIDEO_H
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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// ======================> device_video_interface
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class device_video_interface : public device_interface
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{
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static const char s_unconfigured_screen_tag[];
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public:
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// construction/destruction
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device_video_interface(const machine_config &mconfig, device_t &device, bool screen_required = true);
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virtual ~device_video_interface();
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// configuration
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void set_screen(const char *tag);
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void set_screen(device_t &base, const char *tag)
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{
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m_screen_base = &base;
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m_screen_tag = tag;
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}
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template <class ObjectClass, bool Required>
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void set_screen(device_finder<ObjectClass, Required> &finder)
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{
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m_screen_base = &finder.finder_target().first;
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m_screen_tag = finder.finder_target().second;
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}
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// getters
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screen_device &screen() const { return *m_screen; }
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bool has_screen() const { return m_screen != nullptr; }
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protected:
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// optional operation overrides
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virtual void interface_config_complete() override;
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virtual void interface_validity_check(validity_checker &valid) const override;
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virtual void interface_pre_start() override;
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private:
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// configuration state
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bool m_screen_required; // is a screen required?
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device_t * m_screen_base; // base device for resolving target screen
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const char * m_screen_tag; // configured tag for the target screen
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// internal state
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screen_device * m_screen; // pointer to the screen device
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};
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// iterator
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typedef device_interface_enumerator<device_video_interface> video_interface_enumerator;
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#endif /* MAME_EMU_DIVIDEO_H */
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