protected virtual void DecodeMask(int x, int y, int width, int height, int stripnr, IList <ZPlane> zPlanes, bool transpStrip, DrawBitmaps flags)
{
var zplaneCount = IsZBufferEnabled ? NumZBuffer : 0;
if (flags.HasFlag(DrawBitmaps.DrawMaskOnAll))
{
// Sam & Max uses dbDrawMaskOnAll for things like the inventory
// box and the speech icons. While these objects only have one
// mask, it should be applied to all the Z-planes in the room,
// i.e. they should mask every actor.
//
// This flag used to be called dbDrawMaskOnBoth, and all it
// would do was to mask Z-plane 0. (Z-plane 1 would also be
// masked, because what is now the else-clause used to be run
// always.) While this seems to be the only way there is to
// mask Z-plane 0, this wasn't good enough since actors in
// Z-planes >= 2 would not be masked.
//
// The flag is also used by The Dig and Full Throttle, but I
// don't know what for. At the time of writing, these games
// are still too unstable for me to investigate.
var offs = zPlanes[0].StripOffsets[stripnr];
using (var zplanePtr = new MemoryStream(zPlanes[0].Data))
{
zplanePtr.Seek(offs.Value, SeekOrigin.Begin);
for (var i = 0; i < zplaneCount; i++)
{
var mask_ptr = GetMaskBuffer(x, y, i);
if (transpStrip && (flags.HasFlag(DrawBitmaps.AllowMaskOr)))
{
DecompressMaskImgOr(mask_ptr, zplanePtr, height);
}
else
{
DecompressMaskImg(mask_ptr, zplanePtr, height);
}
}
}
}
else
{
for (var i = 1; i < zplaneCount; i++)
{
var offs = i <= zPlanes.Count ? zPlanes[i - 1].StripOffsets[stripnr] : null;
var mask_ptr = GetMaskBuffer(x, y, i);
if (offs.HasValue)
{
using (var zplanePtr = new MemoryStream(zPlanes[i - 1].Data))
{
zplanePtr.Seek(offs.Value, SeekOrigin.Begin);
if (transpStrip && flags.HasFlag(DrawBitmaps.AllowMaskOr))
{
DecompressMaskImgOr(mask_ptr, zplanePtr, height);
}
else
{
DecompressMaskImg(mask_ptr, zplanePtr, height);
}
}
}
else if (!(transpStrip && flags.HasFlag(DrawBitmaps.AllowMaskOr)))
{
for (var h = 0; h < height; h++)
{
mask_ptr.OffsetY(1);
mask_ptr.Write(0);
}
}
}
}
}
protected virtual void DecodeMask(int x, int y, int width, int height, int stripnr, IList<ZPlane> zPlanes, bool transpStrip, DrawBitmaps flags)
{
var zplaneCount = IsZBufferEnabled ? NumZBuffer : 0;
if (flags.HasFlag(DrawBitmaps.DrawMaskOnAll))
{
// Sam & Max uses dbDrawMaskOnAll for things like the inventory
// box and the speech icons. While these objects only have one
// mask, it should be applied to all the Z-planes in the room,
// i.e. they should mask every actor.
//
// This flag used to be called dbDrawMaskOnBoth, and all it
// would do was to mask Z-plane 0. (Z-plane 1 would also be
// masked, because what is now the else-clause used to be run
// always.) While this seems to be the only way there is to
// mask Z-plane 0, this wasn't good enough since actors in
// Z-planes >= 2 would not be masked.
//
// The flag is also used by The Dig and Full Throttle, but I
// don't know what for. At the time of writing, these games
// are still too unstable for me to investigate.
var offs = zPlanes[0].StripOffsets[stripnr];
using (var zplanePtr = new MemoryStream(zPlanes[0].Data))
{
zplanePtr.Seek(offs.Value, SeekOrigin.Begin);
for (var i = 0; i < zplaneCount; i++)
{
var mask_ptr = GetMaskBuffer(x, y, i);
if (transpStrip && (flags.HasFlag(DrawBitmaps.AllowMaskOr)))
DecompressMaskImgOr(mask_ptr, zplanePtr, height);
else
DecompressMaskImg(mask_ptr, zplanePtr, height);
}
}
}
else
{
for (var i = 1; i < zplaneCount; i++)
{
var offs = i <= zPlanes.Count ? zPlanes[i - 1].StripOffsets[stripnr] : null;
var mask_ptr = GetMaskBuffer(x, y, i);
if (offs.HasValue)
{
using (var zplanePtr = new MemoryStream(zPlanes[i - 1].Data))
{
zplanePtr.Seek(offs.Value, SeekOrigin.Begin);
if (transpStrip && flags.HasFlag(DrawBitmaps.AllowMaskOr))
{
DecompressMaskImgOr(mask_ptr, zplanePtr, height);
}
else
{
DecompressMaskImg(mask_ptr, zplanePtr, height);
}
}
}
else if (!(transpStrip && flags.HasFlag(DrawBitmaps.AllowMaskOr)))
{
for (var h = 0; h < height; h++)
{
mask_ptr.OffsetY(1);
mask_ptr.Write(0);
}
}
}
}
}
public void DrawBitmap(ImageData img, VirtScreen vs, Point p, int width, int height, int stripnr, int numstrip, int roomWidth, DrawBitmaps flags, bool isLightOn)
{
var x = p.X;
var y = p.Y;
if ((_vm.TownsPaletteFlags & 2) != 0)
{
int cx = (x - _vm.ScreenStartStrip) << 3;
Gdi.Fill(_vm.TextSurface,
new Rect(cx * _vm.TextSurfaceMultiplier, y * _vm.TextSurfaceMultiplier,
(cx + width - 1) * _vm.TextSurfaceMultiplier, (y + height - 1) * _vm.TextSurfaceMultiplier), 0);
}
_objectMode = flags.HasFlag(DrawBitmaps.ObjectMode);
PrepareDrawBitmap(img, vs, p, width, height, stripnr, numstrip);
int sx = x - vs.XStart / 8;
if (sx < 0)
{
numstrip -= -sx;
x += -sx;
stripnr += -sx;
sx = 0;
}
// Compute the number of strips we have to iterate over.
// TODO/FIXME: The computation of its initial value looks very fishy.
// It was added as a kind of hack to fix some corner cases, but it compares
// the room width to the virtual screen width; but the former should always
// be bigger than the latter (except for MM NES, maybe)... strange
int limit = Math.Max(roomWidth, vs.Width) / 8 - x;
if (limit > numstrip)
{
limit = numstrip;
}
if (limit > NumStrips - sx)
{
limit = NumStrips - sx;
}
for (int k = 0; k < limit; ++k, ++stripnr, ++sx, ++x)
{
if (y < vs.TDirty[sx])
{
vs.TDirty[sx] = y;
}
if (y + height > vs.BDirty[sx])
{
vs.BDirty[sx] = y + height;
}
// In the case of a double buffered virtual screen, we draw to
// the backbuffer, otherwise to the primary surface memory.
var surface = vs.HasTwoBuffers ? vs.Surfaces[1] : vs.Surfaces[0];
var navDst = new PixelNavigator(surface);
navDst.GoTo(x * 8, y);
bool transpStrip;
using (var smapReader = new BinaryReader(new MemoryStream(img.Data)))
{
transpStrip = DrawStrip(navDst, width, height, stripnr, smapReader);
}
// COMI and HE games only uses flag value
if (game.Version == 8)
{
transpStrip = true;
}
if (vs.HasTwoBuffers)
{
var navFrontBuf = new PixelNavigator(vs.Surfaces[0]);
navFrontBuf.GoTo(x * 8, y);
if (isLightOn)
{
Copy8Col(navFrontBuf, navDst, height);
}
else
{
Clear8Col(navFrontBuf, height);
}
}
DecodeMask(x, y, width, height, stripnr, img.ZPlanes, transpStrip, flags);
}
}
public void DrawBitmap(ImageData img, VirtScreen vs, Point p, int width, int height, int stripnr, int numstrip, int roomWidth, DrawBitmaps flags, bool isLightOn)
{
var x = p.X;
var y = p.Y;
if ((_vm.TownsPaletteFlags & 2) != 0)
{
int cx = (x - _vm.ScreenStartStrip) << 3;
Gdi.Fill(_vm.TextSurface,
new Rect(cx * _vm.TextSurfaceMultiplier, y * _vm.TextSurfaceMultiplier,
(cx + width - 1) * _vm.TextSurfaceMultiplier, (y + height - 1) * _vm.TextSurfaceMultiplier), 0);
}
_objectMode = flags.HasFlag(DrawBitmaps.ObjectMode);
PrepareDrawBitmap(img, vs, p, width, height, stripnr, numstrip);
int sx = x - vs.XStart / 8;
if (sx < 0)
{
numstrip -= -sx;
x += -sx;
stripnr += -sx;
sx = 0;
}
// Compute the number of strips we have to iterate over.
// TODO/FIXME: The computation of its initial value looks very fishy.
// It was added as a kind of hack to fix some corner cases, but it compares
// the room width to the virtual screen width; but the former should always
// be bigger than the latter (except for MM NES, maybe)... strange
int limit = Math.Max(roomWidth, vs.Width) / 8 - x;
if (limit > numstrip)
limit = numstrip;
if (limit > NumStrips - sx)
limit = NumStrips - sx;
for (int k = 0; k < limit; ++k, ++stripnr, ++sx, ++x)
{
if (y < vs.TDirty[sx])
vs.TDirty[sx] = y;
if (y + height > vs.BDirty[sx])
vs.BDirty[sx] = y + height;
// In the case of a double buffered virtual screen, we draw to
// the backbuffer, otherwise to the primary surface memory.
var surface = vs.HasTwoBuffers ? vs.Surfaces[1] : vs.Surfaces[0];
var navDst = new PixelNavigator(surface);
navDst.GoTo(x * 8, y);
bool transpStrip;
using (var smapReader = new BinaryReader(new MemoryStream(img.Data)))
{
transpStrip = DrawStrip(navDst, width, height, stripnr, smapReader);
}
// COMI and HE games only uses flag value
if (game.Version == 8)
transpStrip = true;
if (vs.HasTwoBuffers)
{
var navFrontBuf = new PixelNavigator(vs.Surfaces[0]);
navFrontBuf.GoTo(x * 8, y);
if (isLightOn)
Copy8Col(navFrontBuf, navDst, height);
else
Clear8Col(navFrontBuf, height);
}
DecodeMask(x, y, width, height, stripnr, img.ZPlanes, transpStrip, flags);
}
}