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Diffstat (limited to 'src/mame/video/jalblend.cpp')
-rw-r--r--src/mame/video/jalblend.cpp110
1 files changed, 47 insertions, 63 deletions
diff --git a/src/mame/video/jalblend.cpp b/src/mame/video/jalblend.cpp
index 2a87c5651a9..6dc734c9229 100644
--- a/src/mame/video/jalblend.cpp
+++ b/src/mame/video/jalblend.cpp
@@ -24,9 +24,8 @@
DEFINE_DEVICE_TYPE(JALECO_BLEND, jaleco_blend_device, "jaleco_blend", "Jaleco Blending Device")
-jaleco_blend_device::jaleco_blend_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+jaleco_blend_device::jaleco_blend_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, JALECO_BLEND, tag, owner, clock)
- , m_table(nullptr)
{
}
@@ -36,9 +35,6 @@ jaleco_blend_device::jaleco_blend_device(const machine_config &mconfig, const ch
void jaleco_blend_device::device_start()
{
- m_table = make_unique_clear<uint8_t[]>(0xc00);
-
- save_pointer(NAME(m_table), 0xc00);
}
//-------------------------------------------------
@@ -47,12 +43,6 @@ void jaleco_blend_device::device_start()
void jaleco_blend_device::device_reset()
{
- memset(m_table.get(), 0, 0xc00);
-}
-
-void jaleco_blend_device::set(int color, uint8_t val)
-{
- m_table[color] = val;
}
/*
@@ -67,19 +57,26 @@ void jaleco_blend_device::set(int color, uint8_t val)
* -------x | blue add/subtract
*/
-/* basically an add/subtract function with clamping */
-rgb_t jaleco_blend_device::func(rgb_t dest, rgb_t addMe, uint8_t alpha)
+rgb_t jaleco_blend_device::func(rgb_t dest, rgb_t addMe)
{
- int r, g, b;
- int ir, ig, ib;
+ // Comp with clamp
+ if (addMe.a() & 8)
+ return func(dest, addMe, addMe.a());
- r = (int)dest.r();
- g = (int)dest.g();
- b = (int)dest.b();
+ // Skip the costly alpha step altogether
+ return addMe;
+}
+
+/* basically an add/subtract function with clamping */
+rgb_t jaleco_blend_device::func(rgb_t dest, rgb_t addMe, u8 alpha)
+{
+ int r = (int)dest.r();
+ int g = (int)dest.g();
+ int b = (int)dest.b();
- ir = (int)addMe.r();
- ig = (int)addMe.g();
- ib = (int)addMe.b();
+ const u8 ir = addMe.r();
+ const u8 ig = addMe.g();
+ const u8 ib = addMe.b();
if (alpha & 4)
{ r -= ir; if (r < 0) r = 0; }
@@ -99,77 +96,64 @@ rgb_t jaleco_blend_device::func(rgb_t dest, rgb_t addMe, uint8_t alpha)
template<class _BitmapClass>
void jaleco_blend_device::drawgfx_common(palette_device &palette,_BitmapClass &dest_bmp,const rectangle &clip,gfx_element *gfx,
- uint32_t code,uint32_t color,int flipx,int flipy,int offsx,int offsy,
- int transparent_color)
+ u32 code,u32 color,bool flipx,bool flipy,int offsx,int offsy,
+ u8 transparent_color)
{
/* Start drawing */
const pen_t *pal = &palette.pen(gfx->colorbase() + gfx->granularity() * (color % gfx->colors()));
- const uint8_t *alpha = &m_table[gfx->granularity() * (color % gfx->colors())];
- const uint8_t *source_base = gfx->get_data(code % gfx->elements());
- int x_index_base, y_index, sx, sy, ex, ey;
- int xinc, yinc;
+ const u8 *source_base = gfx->get_data(code % gfx->elements());
- xinc = flipx ? -1 : 1;
- yinc = flipy ? -1 : 1;
+ const int xinc = flipx ? -1 : 1;
+ const int yinc = flipy ? -1 : 1;
- x_index_base = flipx ? gfx->width()-1 : 0;
- y_index = flipy ? gfx->height()-1 : 0;
+ int x_index_base = flipx ? gfx->width() - 1 : 0;
+ int y_index = flipy ? gfx->height() - 1 : 0;
// start coordinates
- sx = offsx;
- sy = offsy;
+ int sx = offsx;
+ int sy = offsy;
// end coordinates
- ex = sx + gfx->width();
- ey = sy + gfx->height();
+ int ex = sx + gfx->width();
+ int ey = sy + gfx->height();
if (sx < clip.min_x)
{ // clip left
- int pixels = clip.min_x-sx;
+ int pixels = clip.min_x - sx;
sx += pixels;
- x_index_base += xinc*pixels;
+ x_index_base += xinc * pixels;
}
if (sy < clip.min_y)
{ // clip top
- int pixels = clip.min_y-sy;
+ int pixels = clip.min_y - sy;
sy += pixels;
- y_index += yinc*pixels;
+ y_index += yinc * pixels;
}
// NS 980211 - fixed incorrect clipping
- if (ex > clip.max_x+1)
+ if (ex > clip.max_x + 1)
{ // clip right
- ex = clip.max_x+1;
+ ex = clip.max_x + 1;
}
- if (ey > clip.max_y+1)
+ if (ey > clip.max_y + 1)
{ // clip bottom
- ey = clip.max_y+1;
+ ey = clip.max_y + 1;
}
if (ex > sx)
{ // skip if inner loop doesn't draw anything
- int x, y;
- // taken from case 7: TRANSPARENCY_ALPHARANGE
- for (y = sy; y < ey; y++)
+ // taken from case : TRANSPARENCY_ALPHARANGE
+ for (int y = sy; y < ey; y++)
{
- const uint8_t *source = source_base + y_index*gfx->rowbytes();
+ const u8 *source = source_base + y_index*gfx->rowbytes();
typename _BitmapClass::pixel_t *dest = &dest_bmp.pix(y);
int x_index = x_index_base;
- for (x = sx; x < ex; x++)
+ for (int x = sx; x < ex; x++)
{
- int c = source[x_index];
+ const u8 c = source[x_index];
if (c != transparent_color)
{
- if (alpha[c] & 8)
- {
- // Comp with clamp
- dest[x] = jaleco_blend_device::func(dest[x], pal[c], alpha[c]);
- }
- else
- {
- // Skip the costly alpha step altogether
- dest[x] = pal[c];
- }
+ dest[x] = jaleco_blend_device::func(dest[x], pal[c]);
}
x_index += xinc;
}
@@ -179,10 +163,10 @@ void jaleco_blend_device::drawgfx_common(palette_device &palette,_BitmapClass &d
}
void jaleco_blend_device::drawgfx(palette_device &palette,bitmap_ind16 &dest_bmp,const rectangle &clip,gfx_element *gfx,
- uint32_t code,uint32_t color,int flipx,int flipy,int offsx,int offsy,
- int transparent_color)
+ u32 code,u32 color,bool flipx,bool flipy,int offsx,int offsy,
+ u8 transparent_color)
{ jaleco_blend_device::drawgfx_common(palette,dest_bmp, clip, gfx, code, color, flipx, flipy, offsx, offsy, transparent_color); }
void jaleco_blend_device::drawgfx(palette_device &palette,bitmap_rgb32 &dest_bmp,const rectangle &clip,gfx_element *gfx,
- uint32_t code,uint32_t color,int flipx,int flipy,int offsx,int offsy,
- int transparent_color)
+ u32 code,u32 color,bool flipx,bool flipy,int offsx,int offsy,
+ u8 transparent_color)
{ jaleco_blend_device::drawgfx_common(palette,dest_bmp, clip, gfx, code, color, flipx, flipy, offsx, offsy, transparent_color); }