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Add optional source data start index arg to Buffer:setArrayData

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The argument list is now Buffer:setArrayData(data or table, sourceindex=1, destindex=1, count=automatically computed)

#1598
This commit is contained in:
Alex Szpakowski
2021-01-16 20:34:27 -04:00
parent 5e77944dc0
commit 52238bb7d9
1 changed files with 37 additions and 18 deletions
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src/modules/graphics/wrap_Buffer.cpp
+37 -18
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@@ -190,34 +190,49 @@ static int w_Buffer_setArrayData(lua_State *L)
{
Buffer *t = luax_checkbuffer(L, 1);
int startindex = (int) luaL_optnumber(L, 3, 1) - 1;
int sourceindex = (int) luaL_optnumber(L, 3, 1) - 1;
int destindex = (int) luaL_optnumber(L, 4, 1) - 1;
if (sourceindex < 0)
return luaL_error(L, "Source start index must be at least 1.");
int count = -1;
if (!lua_isnoneornil(L, 4))
if (!lua_isnoneornil(L, 5))
{
count = (int) luaL_checknumber(L, 4);
count = (int) luaL_checknumber(L, 5);
if (count <= 0)
return luaL_error(L, "Element count must be greater than 0.");
}
size_t stride = t->getArrayStride();
size_t offset = startindex * stride;
size_t bufferoffset = destindex * stride;
int arraylength = (int) t->getArrayLength();
if (startindex >= arraylength || startindex < 0)
return luaL_error(L, "Invalid vertex start index (must be between 1 and %d)", arraylength);
if (destindex >= arraylength || destindex < 0)
return luaL_error(L, "Invalid buffer start index (must be between 1 and %d)", arraylength);
if (luax_istype(L, 2, Data::type))
{
Data *d = luax_checktype<Data>(L, 2);
count = count >= 0 ? count : (arraylength - startindex);
if (startindex + count > arraylength)
return luaL_error(L, "Too many array elements (expected at most %d, got %d)", arraylength - startindex, count);
int dataarraylength = d->getSize() / stride;
size_t datasize = std::min(d->getSize(), count * stride);
if (sourceindex >= dataarraylength)
return luaL_error(L, "Invalid data start index (must be between 1 and %d)", dataarraylength);
t->fill(offset, datasize, d->getData());
int maxcount = std::min(dataarraylength - sourceindex, arraylength - destindex);
if (count < 0)
count = maxcount;
if (count > maxcount)
return luaL_error(L, "Too many array elements (expected at most %d, got %d)", maxcount, count);
size_t dataoffset = sourceindex * stride;
size_t datasize = std::min(d->getSize() - dataoffset, count * stride);
const void *sourcedata = (const uint8 *) d->getData() + dataoffset;
t->fill(bufferoffset, datasize, sourcedata);
return 0;
}
@@ -241,15 +256,19 @@ static int w_Buffer_setArrayData(lua_State *L)
tablelen /= ncomponents;
}
count = count >= 0 ? std::min(count, tablelen) : tablelen;
if (startindex + count > arraylength)
return luaL_error(L, "Too many array elements (expected at most %d, got %d)", arraylength - startindex, count);
if (sourceindex >= tablelen)
return luaL_error(L, "Invalid data start index (must be between 1 and %d)", tablelen);
char *data = (char *) t->map(Buffer::MAP_WRITE_INVALIDATE, offset, count * stride);
count = count >= 0 ? std::min(count, tablelen - sourceindex) : tablelen - sourceindex;
if (destindex + count > arraylength)
return luaL_error(L, "Too many array elements (expected at most %d, got %d)", arraylength - destindex, count);
char *data = (char *) t->map(Buffer::MAP_WRITE_INVALIDATE, bufferoffset, count * stride);
if (tableoftables)
{
for (int i = 0; i < count; i++)
for (int i = sourceindex; i < count; i++)
{
// get arraydata[index]
lua_rawgeti(L, 2, i + 1);
@@ -273,7 +292,7 @@ static int w_Buffer_setArrayData(lua_State *L)
}
else // Flat array
{
for (int i = 0; i < count; i++)
for (int i = sourceindex; i < count; i++)
{
// get arraydata[arrayindex * ncomponents + componentindex]
for (int componentindex = 1; componentindex <= ncomponents; componentindex++)
@@ -292,7 +311,7 @@ static int w_Buffer_setArrayData(lua_State *L)
}
}
t->unmap(offset, count * stride);
t->unmap(bufferoffset, count * stride);
return 0;
}