//-------------------------------------------------
// find_memregion - find memory region
//-------------------------------------------------
public override ListBytesPointer find_memregion(byte width, ref UInt32 length, bool required)
{
// look up the region and return nullptr if not found
memory_region region = base_().memregion(tag());
if (region == null)
{
length = 0;
return(null);
}
// check the width and warn if not correct
if (region.bytewidth() != width)
{
if (required)
{
osd_printf_warning("Region '{0}' found but is width {1}, not {2} as requested\n", tag(), region.bitwidth(), width * 8);
}
length = 0;
return(null);
}
// check the length and warn if other than specified
UInt32 length_found = region.bytes() / width;
if (length != 0 && length != length_found)
{
if (required)
{
osd_printf_warning("Region '{0}' found but has {1} bytes, not {2} as requested\n", tag(), region.bytes(), (int)length * width);
}
length = 0;
return(null);
}
// return results
length = length_found;
return(new ListBytesPointer(region.base_()));
}
// decoding
//-------------------------------------------------
// decode_gfx - parse gfx decode info and
// create gfx elements
//-------------------------------------------------
void decode_gfx(gfx_decode_entry [] gfxdecodeinfo)
{
// skip if nothing to do
if (gfxdecodeinfo == null)
{
return;
}
// local variables to hold mutable copies of gfx layout data
gfx_layout glcopy;
std.vector <u32> extxoffs = new std.vector <u32>(0);
std.vector <u32> extyoffs = new std.vector <u32>(0);
// loop over all elements
for (u8 curgfx = 0; curgfx < digfx_global.MAX_GFX_ELEMENTS && curgfx < gfxdecodeinfo.Length && gfxdecodeinfo[curgfx].gfxlayout != null; curgfx++)
{
gfx_decode_entry gfx = gfxdecodeinfo[curgfx];
// extract the scale factors and xormask
u32 xscale = GFXENTRY_GETXSCALE(gfx.flags);
u32 yscale = GFXENTRY_GETYSCALE(gfx.flags);
u32 xormask = GFXENTRY_ISREVERSE(gfx.flags) ? 7U : 0U;
// resolve the region
u32 region_length;
ListBytesPointer region_base; //const u8 *region_base;
u8 region_width;
endianness_t region_endianness;
if (gfx.memory_region != null)
{
device_t basedevice = (GFXENTRY_ISDEVICE(gfx.flags)) ? device() : device().owner();
if (GFXENTRY_ISRAM(gfx.flags))
{
memory_share share = basedevice.memshare(gfx.memory_region);
//assert(share != NULL);
region_length = (UInt32)(8 * share.bytes());
region_base = share.ptr(); //region_base = reinterpret_cast<u8 *>(share->ptr());
region_width = share.bytewidth();
region_endianness = share.endianness();
}
else
{
memory_region region = basedevice.memregion(gfx.memory_region);
//assert(region != NULL);
region_length = 8 * region.bytes();
region_base = new ListBytesPointer(region.base_(), 0); //region_base = region->base();
region_width = region.bytewidth();
region_endianness = region.endianness();
}
}
else
{
region_length = 0;
region_base = null;
region_width = 1;
region_endianness = ENDIANNESS_NATIVE;
}
if (region_endianness != ENDIANNESS_NATIVE)
{
switch (region_width)
{
case 2:
xormask |= 0x08;
break;
case 4:
xormask |= 0x18;
break;
case 8:
xormask |= 0x38;
break;
}
}
// copy the layout into our temporary variable
glcopy = new gfx_layout(gfx.gfxlayout); //memcpy(&glcopy, gfx.gfxlayout, sizeof(gfx_layout));
// if the character count is a region fraction, compute the effective total
if (IS_FRAC(glcopy.total))
{
//assert(region_length != 0);
glcopy.total = region_length / glcopy.charincrement * FRAC_NUM(glcopy.total) / FRAC_DEN(glcopy.total);
}
// for non-raw graphics, decode the X and Y offsets
if (glcopy.planeoffset[0] != digfx_global.GFX_RAW)
{
// copy the X and Y offsets into our temporary arrays
extxoffs.resize((int)(glcopy.width * xscale));
extyoffs.resize((int)(glcopy.height * yscale));
//memcpy(&extxoffs[0], (glcopy.extxoffs != null) ? glcopy.extxoffs : glcopy.xoffset, glcopy.width * sizeof(UInt32));
//memcpy(&extyoffs[0], (glcopy.extyoffs != null) ? glcopy.extyoffs : glcopy.yoffset, glcopy.height * sizeof(UInt32));
for (int i = 0; i < glcopy.width; i++)
{
extxoffs[i] = glcopy.extxoffs != null ? glcopy.extxoffs[i] : glcopy.xoffset[i];
}
for (int i = 0; i < glcopy.height; i++)
{
extyoffs[i] = glcopy.extyoffs != null ? glcopy.extyoffs[i] : glcopy.yoffset[i];
}
// always use the extended offsets here
glcopy.extxoffs = extxoffs;
glcopy.extyoffs = extyoffs;
// expand X and Y by the scale factors
if (xscale > 1)
{
glcopy.width *= (UInt16)xscale;
for (int j = glcopy.width - 1; j >= 0; j--)
{
extxoffs[j] = extxoffs[(int)(j / xscale)];
}
}
if (yscale > 1)
{
glcopy.height *= (UInt16)yscale;
for (int j = glcopy.height - 1; j >= 0; j--)
{
extyoffs[j] = extyoffs[(int)(j / yscale)];
}
}
// loop over all the planes, converting fractions
for (int j = 0; j < glcopy.planes; j++)
{
u32 value1 = glcopy.planeoffset[j];
if (IS_FRAC(value1))
{
//assert(region_length != 0);
glcopy.planeoffset[j] = FRAC_OFFSET(value1) + region_length * FRAC_NUM(value1) / FRAC_DEN(value1);
}
}
// loop over all the X/Y offsets, converting fractions
for (int j = 0; j < glcopy.width; j++)
{
u32 value2 = extxoffs[j];
if (digfx_global.IS_FRAC(value2))
{
//assert(region_length != 0);
extxoffs[j] = FRAC_OFFSET(value2) + region_length * FRAC_NUM(value2) / FRAC_DEN(value2);
}
}
for (int j = 0; j < glcopy.height; j++)
{
u32 value3 = extyoffs[j];
if (IS_FRAC(value3))
{
//assert(region_length != 0);
extyoffs[j] = FRAC_OFFSET(value3) + region_length * FRAC_NUM(value3) / FRAC_DEN(value3);
}
}
}
// otherwise, just use the line modulo
else
{
int base_ = (int)gfx.start;
int end = (int)(region_length / 8);
int linemod = (int)glcopy.yoffset[0];
while (glcopy.total > 0)
{
int elementbase = (int)(base_ + (glcopy.total - 1) * glcopy.charincrement / 8);
int lastpixelbase = elementbase + glcopy.height * linemod / 8 - 1;
if (lastpixelbase < end)
{
break;
}
glcopy.total--;
}
}
// allocate the graphics
//m_gfx[curgfx] = new gfx_element(m_palette, glcopy, region_base != null ? region_base + gfx.start : null, xormask, gfx.total_color_codes, gfx.color_codes_start);
m_gfx[curgfx] = new gfx_element(m_paletteDevice.target.palette_interface, glcopy, region_base != null ? new ListBytesPointer(region_base, (int)gfx.start) : null, xormask, gfx.total_color_codes, gfx.color_codes_start);
}
m_decoded = true;
}