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luaengine: accept any LUA number type as coordinate

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This commit fixes a type confusion bug in all draw_*() API methods.
When decimal (ie. subpixels) values were passed by user scripts, they
were incorrectly casted from float to plain integers, resulting in
incorrect graphical artifacts.

As this may happen quite often within scripts manipulating numerical
values in LUA, we now also accept decimal values as coordinates.

Signed-off-by: Luca Bruno <lucab@debian.org>
This commit is contained in:
Luca Bruno 2015-04-18 10:48:31 +02:00
parent 0d7860c675
commit d1436e698a
1 changed files with 10 additions and 10 deletions
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20
src/emu/luaengine.c
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@ -642,10 +642,10 @@ int lua_engine::lua_screen::l_draw_box(lua_State *L)
int sc_width = sc->visible_area().width();
int sc_height = sc->visible_area().height();
float x1, y1, x2, y2;
x1 = MIN(MAX(0, lua_tointeger(L, 2)), sc_width-1) / static_cast<float>(sc_width);
y1 = MIN(MAX(0, lua_tointeger(L, 3)), sc_height-1) / static_cast<float>(sc_height);
x2 = MIN(MAX(0, lua_tointeger(L, 4)), sc_width-1) / static_cast<float>(sc_width);
y2 = MIN(MAX(0, lua_tointeger(L, 5)), sc_height-1) / static_cast<float>(sc_height);
x1 = MIN(MAX(0, lua_tonumber(L, 2)), sc_width-1) / static_cast<float>(sc_width);
y1 = MIN(MAX(0, lua_tonumber(L, 3)), sc_height-1) / static_cast<float>(sc_height);
x2 = MIN(MAX(0, lua_tonumber(L, 4)), sc_width-1) / static_cast<float>(sc_width);
y2 = MIN(MAX(0, lua_tonumber(L, 5)), sc_height-1) / static_cast<float>(sc_height);
UINT32 bgcolor = lua_tounsigned(L, 6);
UINT32 fgcolor = lua_tounsigned(L, 7);
@ -680,10 +680,10 @@ int lua_engine::lua_screen::l_draw_line(lua_State *L)
int sc_width = sc->visible_area().width();
int sc_height = sc->visible_area().height();
float x1, y1, x2, y2;
x1 = MIN(MAX(0, lua_tointeger(L, 2)), sc_width-1) / static_cast<float>(sc_width);
y1 = MIN(MAX(0, lua_tointeger(L, 3)), sc_height-1) / static_cast<float>(sc_height);
x2 = MIN(MAX(0, lua_tointeger(L, 4)), sc_width-1) / static_cast<float>(sc_width);
y2 = MIN(MAX(0, lua_tointeger(L, 5)), sc_height-1) / static_cast<float>(sc_height);
x1 = MIN(MAX(0, lua_tonumber(L, 2)), sc_width-1) / static_cast<float>(sc_width);
y1 = MIN(MAX(0, lua_tonumber(L, 3)), sc_height-1) / static_cast<float>(sc_height);
x2 = MIN(MAX(0, lua_tonumber(L, 4)), sc_width-1) / static_cast<float>(sc_width);
y2 = MIN(MAX(0, lua_tonumber(L, 5)), sc_height-1) / static_cast<float>(sc_height);
UINT32 color = lua_tounsigned(L, 6);
// draw the line
@ -711,8 +711,8 @@ int lua_engine::lua_screen::l_draw_text(lua_State *L)
// retrieve all parameters
int sc_width = sc->visible_area().width();
int sc_height = sc->visible_area().height();
float x = MIN(MAX(0, lua_tointeger(L, 2)), sc_width-1) / static_cast<float>(sc_width);
float y = MIN(MAX(0, lua_tointeger(L, 3)), sc_height-1) / static_cast<float>(sc_height);
float x = MIN(MAX(0, lua_tonumber(L, 2)), sc_width-1) / static_cast<float>(sc_width);
float y = MIN(MAX(0, lua_tonumber(L, 3)), sc_height-1) / static_cast<float>(sc_height);
const char *msg = luaL_checkstring(L,4);
// TODO: add optional parameters (colors, etc.)