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Lua (d)bitmap: add hflip and vflip functions

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Rodrigo A. do Amaral 2017-07-13 23:46:23 -03:00 • committed by Ilari Liusvaara
parent 298610752b
commit 9318e4de94
4 changed files with 106 additions and 0 deletions
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4
include/lua/bitmap.hpp
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@ -56,6 +56,8 @@ struct lua_bitmap
int pset(lua::state& L, lua::parameters& P);
int pget(lua::state& L, lua::parameters& P);
int size(lua::state& L, lua::parameters& P);
int hflip(lua::state& L, lua::parameters& P);
int vflip(lua::state& L, lua::parameters& P);
int hash(lua::state& L, lua::parameters& P);
template<bool scaled, bool porterduff> int blit(lua::state& L, lua::parameters& P);
template<bool scaled> int blit_priority(lua::state& L, lua::parameters& P);
@ -81,6 +83,8 @@ struct lua_dbitmap
int pset(lua::state& L, lua::parameters& P);
int pget(lua::state& L, lua::parameters& P);
int size(lua::state& L, lua::parameters& P);
int hflip(lua::state& L, lua::parameters& P);
int vflip(lua::state& L, lua::parameters& P);
int hash(lua::state& L, lua::parameters& P);
template<bool scaled, bool porterduff> int blit(lua::state& L, lua::parameters& P);
int save_png(lua::state& L, lua::parameters& P);

51
lua.lyx
View file

@ -2422,6 +2422,30 @@ Samples the source as texture, performing linear transform (with nearest-neighbo
r sampling) and writes the result to this bitmap.
\end_layout
\begin_layout Subsubsection
Method hflip: Horizontally flip a bitmap
\end_layout
\begin_layout Itemize
Syntax: none bitmap:hflip()
\end_layout
\begin_layout Standard
Horizontally flips a bitmap.
\end_layout
\begin_layout Subsubsection
Method vflip: Vertically flip a bitmap
\end_layout
\begin_layout Itemize
Syntax: none bitmap:vflip()
\end_layout
\begin_layout Standard
Vertically flips a bitmap.
\end_layout
\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset
@ -3196,6 +3220,33 @@ wrap: boolean: If true, wrap the texture.
\begin_layout Standard
Samples the source as texture, performing linear transform (with nearest-neighbo
r sampling) and writes the result to this bitmap.
\end_layout
\begin_layout Subsubsection
Method hflip: Horizontally flip a bitmap
\end_layout
\begin_layout Itemize
Syntax: none dbitmap:hflip()
\end_layout
\begin_layout Standard
Horizontally flips a bitmap.
\end_layout
\begin_layout Subsubsection
Method vflip: Vertically flip a bitmap
\end_layout
\begin_layout Itemize
Syntax: none dbitmap:vflip()
\end_layout
\begin_layout Standard
Vertically flips a bitmap.
\end_layout
\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset

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lua.pdf
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51
src/lua/gui-bitmap.cpp
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@ -634,6 +634,33 @@ namespace
}
}
template<typename pixel>
inline int _hflip(pixel* pixels, uint32_t width, uint32_t height)
{
uint32_t w = width, h = height;
for (uint32_t x = 0; x < w/2; x++) {
for (uint32_t y = 0; y < h; y++) {
std::swap(pixels[y * w + x], pixels[(y + 1) * w - x - 1]);
}
}
return 0;
}
template<typename pixel>
inline int _vflip(pixel* pixels, uint32_t width, uint32_t height)
{
uint32_t w = width, h = height;
for (uint32_t x = 0; x < w; x++) {
for (uint32_t y = 0; y < h/2; y++) {
std::swap(pixels[y * w + x], pixels[(h - y - 1) * w + x]);
}
}
return 0;
}
inline int64_t mangle_color(uint32_t c)
{
if(c < 0x1000000)
@ -829,6 +856,8 @@ namespace
{"pset", &lua_bitmap::pset},
{"pget", &lua_bitmap::pget},
{"size", &lua_bitmap::size},
{"hflip", &lua_bitmap::hflip},
{"vflip", &lua_bitmap::vflip},
{"hash", &lua_bitmap::hash},
{"blit", &lua_bitmap::blit<false, false>},
{"blit_priority", &lua_bitmap::blit_priority<false>},
@ -850,6 +879,8 @@ namespace
{"pset", &lua_dbitmap::pset},
{"pget", &lua_dbitmap::pget},
{"size", &lua_dbitmap::size},
{"hflip", &lua_dbitmap::hflip},
{"vflip", &lua_dbitmap::vflip},
{"hash", &lua_dbitmap::hash},
{"blit", &lua_dbitmap::blit<false, false>},
{"blit_scaled", &lua_dbitmap::blit<true, false>},
@ -1102,6 +1133,16 @@ int lua_bitmap::size(lua::state& L, lua::parameters& P)
return 2;
}
int lua_bitmap::hflip(lua::state& L, lua::parameters& P)
{
return _hflip(pixels, width, height);
}
int lua_bitmap::vflip(lua::state& L, lua::parameters& P)
{
return _vflip(pixels, width, height);
}
int lua_bitmap::hash(lua::state& L, lua::parameters& P)
{
sha256 h;
@ -1289,6 +1330,16 @@ int lua_dbitmap::size(lua::state& L, lua::parameters& P)
return 2;
}
int lua_dbitmap::hflip(lua::state& L, lua::parameters& P)
{
return _hflip(pixels, width, height);
}
int lua_dbitmap::vflip(lua::state& L, lua::parameters& P)
{
return _vflip(pixels, width, height);
}
int lua_dbitmap::hash(lua::state& L, lua::parameters& P)
{
sha256 h;