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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>
This commit is contained in:
hecks 2021-07-29 05:10:10 +02:00 committed by GitHub
parent 2866918f32
commit 80d12dbedb
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
9 changed files with 278 additions and 1 deletions

View file

@ -40,6 +40,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "version.h"
#include "util/hex.h"
#include "util/sha1.h"
#include "util/png.h"
#include <algorithm>
#include <cstdio>
@ -497,6 +498,43 @@ int ModApiUtil::l_colorspec_to_colorstring(lua_State *L)
return 0;
}
// colorspec_to_bytes(colorspec)
int ModApiUtil::l_colorspec_to_bytes(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
video::SColor color(0);
if (read_color(L, 1, &color)) {
u8 colorbytes[4] = {
(u8) color.getRed(),
(u8) color.getGreen(),
(u8) color.getBlue(),
(u8) color.getAlpha(),
};
lua_pushlstring(L, (const char*) colorbytes, 4);
return 1;
}
return 0;
}
// encode_png(w, h, data, level)
int ModApiUtil::l_encode_png(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
// The args are already pre-validated on the lua side.
u32 width = readParam<int>(L, 1);
u32 height = readParam<int>(L, 2);
const char *data = luaL_checklstring(L, 3, NULL);
s32 compression = readParam<int>(L, 4);
std::string out = encodePNG((const u8*)data, width, height, compression);
lua_pushlstring(L, out.data(), out.size());
return 1;
}
void ModApiUtil::Initialize(lua_State *L, int top)
{
API_FCT(log);
@ -532,6 +570,9 @@ void ModApiUtil::Initialize(lua_State *L, int top)
API_FCT(get_version);
API_FCT(sha1);
API_FCT(colorspec_to_colorstring);
API_FCT(colorspec_to_bytes);
API_FCT(encode_png);
LuaSettings::create(L, g_settings, g_settings_path);
lua_setfield(L, top, "settings");
@ -557,6 +598,7 @@ void ModApiUtil::InitializeClient(lua_State *L, int top)
API_FCT(get_version);
API_FCT(sha1);
API_FCT(colorspec_to_colorstring);
API_FCT(colorspec_to_bytes);
}
void ModApiUtil::InitializeAsync(lua_State *L, int top)
@ -585,6 +627,7 @@ void ModApiUtil::InitializeAsync(lua_State *L, int top)
API_FCT(get_version);
API_FCT(sha1);
API_FCT(colorspec_to_colorstring);
API_FCT(colorspec_to_bytes);
LuaSettings::create(L, g_settings, g_settings_path);
lua_setfield(L, top, "settings");

View file

@ -104,6 +104,12 @@ private:
// colorspec_to_colorstring(colorspec)
static int l_colorspec_to_colorstring(lua_State *L);
// colorspec_to_bytes(colorspec)
static int l_colorspec_to_bytes(lua_State *L);
// encode_png(w, h, data, level)
static int l_encode_png(lua_State *L);
public:
static void Initialize(lua_State *L, int top);
static void InitializeAsync(lua_State *L, int top);