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Add a simple PNG image encoder with Lua API (#11485)
* Add a simple PNG image encoder with Lua API Add ColorSpec to RGBA converter Make a safety wrapper for the encoder Create devtest examples Co-authored-by: hecktest <> Co-authored-by: sfan5 <sfan5@live.de>
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9 changed files with 278 additions and 1 deletions
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@ -40,6 +40,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "version.h"
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#include "util/hex.h"
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#include "util/sha1.h"
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#include "util/png.h"
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#include <algorithm>
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#include <cstdio>
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@ -497,6 +498,43 @@ int ModApiUtil::l_colorspec_to_colorstring(lua_State *L)
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return 0;
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}
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// colorspec_to_bytes(colorspec)
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int ModApiUtil::l_colorspec_to_bytes(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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video::SColor color(0);
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if (read_color(L, 1, &color)) {
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u8 colorbytes[4] = {
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(u8) color.getRed(),
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(u8) color.getGreen(),
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(u8) color.getBlue(),
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(u8) color.getAlpha(),
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};
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lua_pushlstring(L, (const char*) colorbytes, 4);
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return 1;
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}
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return 0;
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}
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// encode_png(w, h, data, level)
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int ModApiUtil::l_encode_png(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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// The args are already pre-validated on the lua side.
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u32 width = readParam<int>(L, 1);
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u32 height = readParam<int>(L, 2);
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const char *data = luaL_checklstring(L, 3, NULL);
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s32 compression = readParam<int>(L, 4);
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std::string out = encodePNG((const u8*)data, width, height, compression);
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lua_pushlstring(L, out.data(), out.size());
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return 1;
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}
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void ModApiUtil::Initialize(lua_State *L, int top)
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{
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API_FCT(log);
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@ -532,6 +570,9 @@ void ModApiUtil::Initialize(lua_State *L, int top)
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API_FCT(get_version);
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API_FCT(sha1);
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API_FCT(colorspec_to_colorstring);
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API_FCT(colorspec_to_bytes);
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API_FCT(encode_png);
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LuaSettings::create(L, g_settings, g_settings_path);
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lua_setfield(L, top, "settings");
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@ -557,6 +598,7 @@ void ModApiUtil::InitializeClient(lua_State *L, int top)
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API_FCT(get_version);
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API_FCT(sha1);
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API_FCT(colorspec_to_colorstring);
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API_FCT(colorspec_to_bytes);
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}
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void ModApiUtil::InitializeAsync(lua_State *L, int top)
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@ -585,6 +627,7 @@ void ModApiUtil::InitializeAsync(lua_State *L, int top)
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API_FCT(get_version);
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API_FCT(sha1);
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API_FCT(colorspec_to_colorstring);
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API_FCT(colorspec_to_bytes);
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LuaSettings::create(L, g_settings, g_settings_path);
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lua_setfield(L, top, "settings");
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@ -104,6 +104,12 @@ private:
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// colorspec_to_colorstring(colorspec)
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static int l_colorspec_to_colorstring(lua_State *L);
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// colorspec_to_bytes(colorspec)
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static int l_colorspec_to_bytes(lua_State *L);
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// encode_png(w, h, data, level)
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static int l_encode_png(lua_State *L);
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public:
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static void Initialize(lua_State *L, int top);
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static void InitializeAsync(lua_State *L, int top);
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