// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
screen.h
Core MAME screen device.
***************************************************************************/
#ifndef MAME_EMU_SCREEN_H
#define MAME_EMU_SCREEN_H
#pragma once
#include <type_traits>
#include <utility>
//**************************************************************************
// CONSTANTS
//**************************************************************************
// screen types
enum screen_type_enum
{
SCREEN_TYPE_INVALID = 0,
SCREEN_TYPE_RASTER,
SCREEN_TYPE_VECTOR,
SCREEN_TYPE_LCD,
SCREEN_TYPE_SVG
};
// texture formats
enum texture_format
{
TEXFORMAT_UNDEFINED = 0, // require a format to be specified
TEXFORMAT_PALETTE16, // 16bpp palettized, no alpha
TEXFORMAT_RGB32, // 32bpp 8-8-8 RGB
TEXFORMAT_ARGB32, // 32bpp 8-8-8-8 ARGB
TEXFORMAT_YUY16 // 16bpp 8-8 Y/Cb, Y/Cr in sequence
};
// screen_update callback flags
constexpr u32 UPDATE_HAS_NOT_CHANGED = 0x0001; // the video has not changed
/*!
@defgroup flags for video_attributes
@{
@def VIDEO_UPDATE_BEFORE_VBLANK
update_video called at the start of the VBLANK period
@todo hack, remove me
@def VIDEO_UPDATE_AFTER_VBLANK
update_video called at the end of the VBLANK period
@todo hack, remove me
@def VIDEO_SELF_RENDER
indicates VIDEO_UPDATE will add container bits itself
@def VIDEO_ALWAYS_UPDATE
force VIDEO_UPDATE to be called even for skipped frames.
@todo in case you need this one for model updating, then you're doing it wrong (read: hack)
@def VIDEO_UPDATE_SCANLINE
calls VIDEO_UPDATE for every visible scanline, even for skipped frames
@def VIDEO_VARIABLE_WIDTH
causes the screen to construct its final bitmap from a composite upscale of individual scanline bitmaps
@}
*/
constexpr u32 VIDEO_UPDATE_BEFORE_VBLANK = 0x0000;
constexpr u32 VIDEO_UPDATE_AFTER_VBLANK = 0x0004;
constexpr u32 VIDEO_SELF_RENDER = 0x0008;
constexpr u32 VIDEO_ALWAYS_UPDATE = 0x0080;
constexpr u32 VIDEO_UPDATE_SCANLINE = 0x0100;
constexpr u32 VIDEO_VARIABLE_WIDTH = 0x0200;
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> screen_bitmap
class screen_bitmap
{
private:
// internal helpers
bitmap_t &live() { assert(m_live != nullptr); return *m_live; }
const bitmap_t &live() const { assert(m_live != nullptr); return *m_live; }
public:
// construction/destruction
screen_bitmap()
: m_format(BITMAP_FORMAT_RGB32)
, m_texformat(TEXFORMAT_RGB32)
, m_live(&m_rgb32)
{ }
screen_bitmap(bitmap_ind16 &orig)
: m_format(BITMAP_FORMAT_IND16)
, m_texformat(TEXFORMAT_PALETTE16)
, m_live(&m_ind16)
, m_ind16(orig, orig.cliprect())
{ }
screen_bitmap(bitmap_rgb32 &orig)
: m_format(BITMAP_FORMAT_RGB32)
, m_texformat(TEXFORMAT_RGB32)
, m_live(&m_rgb32)
, m_rgb32(orig, orig.cliprect())
{ }
// resizing
void resize(int width, int height) { live().resize(width, height); }
// conversion
operator bitmap_t &() { return live(); }
bitmap_ind16 &as_ind16() { assert(m_format == BITMAP_FORMAT_IND16); return m_ind16; }
bitmap_rgb32 &as_rgb32() { assert(m_format == BITMAP_FORMAT_RGB32); return m_rgb32; }
// getters
s32 width() const { return live().width(); }
s32 height() const { return live().height(); }
s32 rowpixels() const { return live().rowpixels(); }
s32 rowbytes() const { return live().rowbytes(); }
u8 bpp() const { return live().bpp(); }
bitmap_format format() const { return m_format; }
texture_format texformat() const { return m_texformat; }
bool valid() const { return live().valid(); }
palette_t *palette() const { return live().palette(); }
const rectangle &cliprect() const { return live().cliprect(); }
// operations
void set_palette(palette_t *palette) { live().set_palette(palette); }
void set_format(bitmap_format format, texture_format texformat)
{
m_format = format;
m_texformat = texformat;
switch (format)
{
case BITMAP_FORMAT_IND16: m_live = &m_ind16; break;
case BITMAP_FORMAT_RGB32: m_live = &m_rgb32; break;
default: m_live = nullptr; break;
}
m_ind16.reset();
m_rgb32.reset();
}
private:
// internal state
bitmap_format m_format;
texture_format m_texformat;
bitmap_t * m_live;
bitmap_ind16 m_ind16;
bitmap_rgb32 m_rgb32;
};
// ======================> other delegate types
typedef delegate<void (screen_device &, bool)> vblank_state_delegate;
typedef device_delegate<u32 (screen_device &, bitmap_ind16 &, const rectangle &)> screen_update_ind16_delegate;
typedef device_delegate<u32 (screen_device &, bitmap_rgb32 &, const rectangle &)> screen_update_rgb32_delegate;
// ======================> screen_device
class screen_device : public device_t
{
friend class render_manager;
public:
// construction/destruction
screen_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
screen_device(const machine_config &mconfig, const char *tag, device_t *owner, screen_type_enum type)
: screen_device(mconfig, tag, owner, u32(0))
{
set_type(type);
}
screen_device(const machine_config &mconfig, const char *tag, device_t *owner, screen_type_enum type, rgb_t color)
: screen_device(mconfig, tag, owner, u32(0))
{
set_type(type);
set_color(color);
}
~screen_device();
// configuration readers
screen_type_enum screen_type() const { return m_type; }
int orientation() const { assert(configured()); return m_orientation; }
std::pair<unsigned, unsigned> physical_aspect() const;
int width() const { return m_width; }
int height() const { return m_height; }
const rectangle &visible_area() const { return m_visarea; }
const rectangle &cliprect() const { return m_bitmap[0].cliprect(); }
bool oldstyle_vblank_supplied() const { return m_oldstyle_vblank_supplied; }
attoseconds_t refresh_attoseconds() const { return m_refresh; }
attoseconds_t vblank_attoseconds() const { return m_vblank; }
bitmap_format format() const { return !m_screen_update_ind16.isnull() ? BITMAP_FORMAT_IND16 : BITMAP_FORMAT_RGB32; }
float xoffset() const { return m_xoffset; }
float yoffset() const { return m_yoffset; }
float xscale() const { return m_xscale; }
float yscale() const { return m_yscale; }
bool has_screen_update() const { return !m_screen_update_ind16.isnull() || !m_screen_update_rgb32.isnull(); }
// inline configuration helpers
void set_type(screen_type_enum type) { assert(!configured()); m_type = type; }
void set_orientation(int orientation) { assert(!configured()); m_orientation = orientation; }
void set_physical_aspect(unsigned x, unsigned y) { assert(!configured()); m_phys_aspect = std::make_pair(x, y); }
void set_native_aspect() { assert(!configured()); m_phys_aspect = std::make_pair(~0U, ~0U); }
/// \brief Configure screen parameters
///
/// \param [in] pixclock Pixel clock frequency in Hertz.
/// \param [in] htotal Total pixel clocks per line, including
/// horizontal blanking period.
/// \param [in] hbend Index of first visible pixel after horizontal
/// blanking period ends.
/// \param [in] hbstart Index of first pixel in horzontal blanking
/// period after visible pixels.
/// \param [in] vtotal Total lines per frame, including vertical
/// blanking period.
/// \param [in] vbend Index of first visible line after vertical
/// blanking period ends.
/// \param [in] vbstart Index of first line in vertical blanking
/// period after visible lines.
/// \return Reference to device for method chaining.
screen_device &set_raw(u32 pixclock, u16 htotal, u16 hbend, u16 hbstart, u16 vtotal, u16 vbend, u16 vbstart)
{
assert(pixclock != 0);
m_clock = pixclock;
m_refresh = HZ_TO_ATTOSECONDS(pixclock) * htotal * vtotal;
m_vblank = m_refresh / vtotal * (vtotal - (vbstart - vbend));
m_width = htotal;
m_height = vtotal;
m_visarea.set(hbend, hbstart - 1, vbend, vbstart - 1);
return *this;
}
screen_device &set_raw(const XTAL &xtal, u16 htotal, u16 hbend, u16 hbstart, u16 vtotal, u16 vbend, u16 vbstart)
{
xtal.validate(std::string("Configuring screen ") + tag());
return set_raw(xtal.value(), htotal, hbend, hbstart, vtotal, vbend, vbstart);
}
void set_refresh(attoseconds_t rate) { m_refresh = rate; }
/// \brief Set refresh rate in Hertz
///
/// Sets refresh rate in Hertz (frames per second). Used in
/// conjunction with #set_vblank_time, #set_size and #set_visarea.
/// For raster displays, please use #set_raw to configure screen
/// parameters in terms of pixel clock.
/// \param [in] hz Desired refresh rate.
/// \return Reference to device for method chaining.
template <typename T> screen_device &set_refresh_hz(T &&hz)
{
set_refresh(HZ_TO_ATTOSECONDS(std::forward<T>(hz)));
return *this;
}
/// \brief Set vertical blanking interval time
///
/// Sets vertical blanking interval period. Used in conjunction
/// with #set_refresh_hz, #set_size and #set_visarea. For raster
/// displays, please use #set_raw to configure screen parameters in
/// terms of pixel clock.
/// \param [in] time Length of vertical blanking interval.
/// \return Reference to device for method chaining.
screen_device &set_vblank_time(attoseconds_t time)
{
m_vblank = time;
m_oldstyle_vblank_supplied = true;
return *this;
}
/// \brief Set total screen size
///
/// Set the total screen size in pixels, including blanking areas if
/// applicable. This sets the size of the screen bitmap. Used in
/// conjunction with #set_refresh_hz, #set_vblank_time and
/// #set_visarea. For raster displays, please use #set_raw to
/// configure screen parameters in terms of pixel clock.
/// \param [in] width Total width in pixels, including horizontal
/// blanking period if applicable.
/// \param [in] height Total height in lines, including vertical
/// blanking period if applicable.
/// \return Reference to device for method chaining.
screen_device &set_size(u16 width, u16 height)
{
m_width = width;
m_height = height;
return *this;
}
/// \brief Set visible screen area
///
/// Set visible screen area. This should fit within the total
/// screen area. Used in conjunction with #set_refresh_hz,
/// #set_vblank_time and #set_size. For raster displays, please
/// use #set_raw to configure screen parameters in terms of pixel
/// clock.
/// \param [in] minx First visible pixel index after horizontal
/// blanking period ends.
/// \param [in] maxx Last visible pixel index before horizontal
/// blanking period starts.
/// \param [in] miny First visible line index after vertical
/// blanking period ends.
/// \param [in] maxy Last visible line index before vertical
/// blanking period starts.
/// \return Reference to device for method chaining.
screen_device &set_visarea(s16 minx, s16 maxx, s16 miny, s16 maxy)
{
m_visarea.set(minx, maxx, miny, maxy);
return *this;
}
/// \brief Set visible area to full area
///
/// Set visible screen area to the full screen area (i.e. noi
/// horizontal or vertical blanking period). This is generally not
/// possible for raster displays, but is useful for other display
/// simulations. Must be called after calling #set_size.
/// \return Reference to device for method chaining.
/// \sa set_visarea
screen_device &set_visarea_full()
{
m_visarea.set(0, m_width - 1, 0, m_height - 1);
return *this;
}
void set_default_position(double xscale, double xoffs, double yscale, double yoffs)
{
m_xscale = xscale;
m_xoffset = xoffs;
m_yscale = yscale;
m_yoffset = yoffs;
}
template <typename F>
std::enable_if_t<screen_update_ind16_delegate::supports_callback<F>::value> set_screen_update(F &&callback, const char *name)
{
m_screen_update_ind16.set(std::forward<F>(callback), name);
m_screen_update_rgb32 = screen_update_rgb32_delegate(*this);
}
template <typename F>
std::enable_if_t<screen_update_rgb32_delegate::supports_callback<F>::value> set_screen_update(F &&callback, const char *name)
{
m_screen_update_ind16 = screen_update_ind16_delegate(*this);
m_screen_update_rgb32.set(std::forward<F>(callback), name);
}
template <typename T, typename F>
std::enable_if_t<screen_update_ind16_delegate::supports_callback<F>::value> set_screen_update(T &&target, F &&callback, const char *name)
{
m_screen_update_ind16.set(std::forward<T>(target), std::forward<F>(callback), name);
m_screen_update_rgb32 = screen_update_rgb32_delegate(*this);
}
template <typename T, typename F>
std::enable_if_t<screen_update_rgb32_delegate::supports_callback<F>::value> set_screen_update(T &&target, F &&callback, const char *name)
{
m_screen_update_ind16 = screen_update_ind16_delegate(*this);
m_screen_update_rgb32.set(std::forward<T>(target), std::forward<F>(callback), name);
}
auto screen_vblank() { return m_screen_vblank.bind(); }
auto scanline() { m_video_attributes |= VIDEO_UPDATE_SCANLINE; return m_scanline_cb.bind(); }
template <typename T> screen_device &set_palette(T &&tag) { m_palette.set_tag(std::forward<T>(tag)); return *this; }
screen_device &set_no_palette() { m_palette.set_tag(finder_base::DUMMY_TAG); return *this; }
screen_device &set_video_attributes(u32 flags) { m_video_attributes = flags; return *this; }
screen_device &set_color(rgb_t color) { m_color = color; return *this; }
template <typename T> screen_device &set_svg_region(T &&tag) { m_svg_region.set_tag(std::forward<T>(tag)); return *this; } // default region is device tag
// information getters
render_container &container() const { assert(m_container != nullptr); return *m_container; }
bitmap_ind8 &priority() { return m_priority; }
device_palette_interface &palette() const { assert(m_palette != nullptr); return *m_palette; }
bool has_palette() const { return m_palette != nullptr; }
screen_bitmap &curbitmap() { return m_bitmap[m_curtexture]; }
// dynamic configuration
void configure(int width, int height, const rectangle &visarea, attoseconds_t frame_period);
void reset_origin(int beamy = 0, int beamx = 0);
void set_visible_area(int min_x, int max_x, int min_y, int max_y);
void set_brightness(u8 brightness) { m_brightness = brightness; }
// beam positioning and state
int vpos() const;
int hpos() const;
DECLARE_READ_LINE_MEMBER(vblank) const { return (machine().time() < m_vblank_end_time) ? 1 : 0; }
DECLARE_READ_LINE_MEMBER(hblank) const { int const curpos = hpos(); return (curpos < m_visarea.left() || curpos > m_visarea.right()) ? 1 : 0; }
// timing
attotime time_until_pos(int vpos, int hpos = 0) const;
attotime time_until_vblank_start() const { return time_until_pos(m_visarea.bottom() + 1); }
attotime time_until_vblank_end() const;
attotime time_until_update() const { return (m_video_attributes & VIDEO_UPDATE_AFTER_VBLANK) ? time_until_vblank_end() : time_until_vblank_start(); }
attotime scan_period() const { return attotime(0, m_scantime); }
attotime frame_period() const { return attotime(0, m_frame_period); }
u64 frame_number() const { return m_frame_number; }
// pixel-level access
u32 pixel(s32 x, s32 y);
void pixels(u32* buffer);
// updating
int partial_updates() const { return m_partial_updates_this_frame; }
bool update_partial(int scanline);
void update_now();
void reset_partial_updates();
// additional helpers
void register_vblank_callback(vblank_state_delegate vblank_callback);
void register_screen_bitmap(bitmap_t &bitmap);
// internal to the video system
bool update_quads();
void update_burnin();
// globally accessible constants
static constexpr int DEFAULT_FRAME_RATE = 60;
static const attotime DEFAULT_FRAME_PERIOD;
private:
class svg_renderer;
// timer IDs
enum
{
TID_VBLANK_START,
TID_VBLANK_END,
TID_SCANLINE0,
TID_SCANLINE
};
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const override;
virtual void device_config_complete() override;
virtual void device_resolve_objects() override;
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_stop() override;
virtual void device_post_load() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
// internal helpers
void set_container(render_container &container) { m_container = &container; }
void realloc_screen_bitmaps();
void vblank_begin();
void vblank_end();
void finalize_burnin();
void load_effect_overlay(const char *filename);
void update_scan_bitmap_size(int y);
void pre_update_scanline(int y);
void create_composited_bitmap();
void destroy_scan_bitmaps();
void allocate_scan_bitmaps();
// inline configuration data
screen_type_enum m_type; // type of screen
int m_orientation; // orientation flags combined with system flags
std::pair<unsigned, unsigned> m_phys_aspect; // physical aspect ratio
bool m_oldstyle_vblank_supplied; // set_vblank_time call used
attoseconds_t m_refresh; // default refresh period
attoseconds_t m_vblank; // duration of a VBLANK
float m_xoffset, m_yoffset; // default X/Y offsets
float m_xscale, m_yscale; // default X/Y scale factor
screen_update_ind16_delegate m_screen_update_ind16; // screen update callback (16-bit palette)
screen_update_rgb32_delegate m_screen_update_rgb32; // screen update callback (32-bit RGB)
devcb_write_line m_screen_vblank; // screen vblank line callback
devcb_write32 m_scanline_cb; // screen scanline callback
optional_device<device_palette_interface> m_palette; // our palette
u32 m_video_attributes; // flags describing the video system
optional_memory_region m_svg_region; // the region in which the svg data is in
// internal state
render_container * m_container; // pointer to our container
std::unique_ptr<svg_renderer> m_svg; // the svg renderer
// dimensions
int m_max_width; // maximum width encountered
int m_width; // current width (HTOTAL)
int m_height; // current height (VTOTAL)
rectangle m_visarea; // current visible area (HBLANK end/start, VBLANK end/start)
std::vector<int> m_scan_widths; // current width, in samples, of each individual scanline
// textures and bitmaps
texture_format m_texformat; // texture format
render_texture * m_texture[2]; // 2x textures for the screen bitmap
screen_bitmap m_bitmap[2]; // 2x bitmaps for rendering
std::vector<bitmap_t *> m_scan_bitmaps[2]; // 2x bitmaps for each individual scanline
bitmap_ind8 m_priority; // priority bitmap
bitmap_ind64 m_burnin; // burn-in bitmap
u8 m_curbitmap; // current bitmap index
u8 m_curtexture; // current texture index
bool m_changed; // has this bitmap changed?
s32 m_last_partial_scan; // scanline of last partial update
s32 m_partial_scan_hpos; // horizontal pixel last rendered on this partial scanline
bitmap_argb32 m_screen_overlay_bitmap; // screen overlay bitmap
u32 m_unique_id; // unique id for this screen_device
rgb_t m_color; // render color
u8 m_brightness; // global brightness
// screen timing
attoseconds_t m_frame_period; // attoseconds per frame
attoseconds_t m_scantime; // attoseconds per scanline
attoseconds_t m_pixeltime; // attoseconds per pixel
attoseconds_t m_vblank_period; // attoseconds per VBLANK period
attotime m_vblank_start_time; // time of last VBLANK start
attotime m_vblank_end_time; // time of last VBLANK end
emu_timer * m_vblank_begin_timer; // timer to signal VBLANK start
emu_timer * m_vblank_end_timer; // timer to signal VBLANK end
emu_timer * m_scanline0_timer; // scanline 0 timer
emu_timer * m_scanline_timer; // scanline timer
u64 m_frame_number; // the current frame number
u32 m_partial_updates_this_frame;// partial update counter this frame
bool m_is_primary_screen;
// VBLANK callbacks
class callback_item
{
public:
callback_item(vblank_state_delegate callback)
: m_callback(std::move(callback)) { }
vblank_state_delegate m_callback;
};
std::vector<std::unique_ptr<callback_item>> m_callback_list; // list of VBLANK callbacks
// auto-sizing bitmaps
class auto_bitmap_item
{
public:
auto_bitmap_item(bitmap_t &bitmap)
: m_bitmap(bitmap) { }
bitmap_t & m_bitmap;
};
std::vector<std::unique_ptr<auto_bitmap_item>> m_auto_bitmap_list; // list of registered bitmaps
// static data
static u32 m_id_counter; // incremented for each constructed screen_device,
// used as a unique identifier during runtime
};
// device type definition
DECLARE_DEVICE_TYPE(SCREEN, screen_device)
// iterator helper
typedef device_type_iterator<screen_device> screen_device_iterator;
/*!
@defgroup Screen device configuration functions
@{
@def set_type
Modify the screen device type
@see screen_type_enum
@}
*/
#endif // MAME_EMU_SCREEN_H