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screen: add an adjustable global brightness

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This commit is contained in:
Dirk Best 2015-08-05 14:37:28 +02:00
parent f7835bb35f
commit cdeb045fbd
2 changed files with 23 additions and 1 deletions
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19
src/emu/screen.c
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@ -63,6 +63,8 @@ screen_device::screen_device(const machine_config &mconfig, const char *tag, dev
m_curtexture(0),
m_changed(true),
m_last_partial_scan(0),
m_color(rgb_t(0xff, 0xff, 0xff, 0xff)),
m_brightness(0xff),
m_frame_period(DEFAULT_FRAME_PERIOD.as_attoseconds()),
m_scantime(1),
m_pixeltime(1),
@ -356,6 +358,7 @@ void screen_device::device_start()
save_item(NAME(m_visarea.max_y));
save_item(NAME(m_last_partial_scan));
save_item(NAME(m_frame_period));
save_item(NAME(m_brightness));
save_item(NAME(m_scantime));
save_item(NAME(m_pixeltime));
save_item(NAME(m_vblank_period));
@ -365,6 +368,17 @@ void screen_device::device_start()
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void screen_device::device_reset()
{
// reset brightness to default
m_brightness = 0xff;
}
//-------------------------------------------------
// device_stop - clean up before the machine goes
// away
@ -884,9 +898,12 @@ bool screen_device::update_quads()
m_curbitmap = 1 - m_curbitmap;
}
// brightness adjusted render color
rgb_t color = m_color - rgb_t(0, 0xff - m_brightness, 0xff - m_brightness, 0xff - m_brightness);
// create an empty container with a single quad
m_container->empty();
m_container->add_quad(0.0f, 0.0f, 1.0f, 1.0f, rgb_t(0xff,0xff,0xff,0xff), m_texture[m_curtexture], PRIMFLAG_BLENDMODE(BLENDMODE_NONE) | PRIMFLAG_SCREENTEX(1));
m_container->add_quad(0.0f, 0.0f, 1.0f, 1.0f, color, m_texture[m_curtexture], PRIMFLAG_BLENDMODE(BLENDMODE_NONE) | PRIMFLAG_SCREENTEX(1));
}
}

5
src/emu/screen.h
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@ -186,10 +186,12 @@ public:
render_container &container() const { assert(m_container != NULL); return *m_container; }
bitmap_ind8 &priority() { return m_priority; }
palette_device *palette() { return m_palette; }
// 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(UINT8 brightness) { m_brightness = brightness; }
// beam positioning and state
int vpos() const;
@ -239,6 +241,7 @@ private:
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const;
virtual void device_start();
virtual void device_reset();
virtual void device_stop();
virtual void device_post_load();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
@ -284,6 +287,8 @@ private:
INT32 m_last_partial_scan; // scanline of last partial update
bitmap_argb32 m_screen_overlay_bitmap; // screen overlay bitmap
UINT32 m_unique_id; // unique id for this screen_device
rgb_t m_color; // render color
UINT8 m_brightness; // global brightness
// screen timing
attoseconds_t m_frame_period; // attoseconds per frame