/**
* @brief Compares two colours to see if they are the same.
*
* @luaparam c1 Colour 1 to compare.
* @luaparam c2 Colour 2 to compare.
* @luareturn true if both colours are the same.
* @luafunc __eq( c1, c2 )
*/
static int colL_eq( lua_State *L )
{
LuaColour *c1, *c2;
c1 = luaL_checkcolour(L,1);
c2 = luaL_checkcolour(L,2);
lua_pushboolean( L, (memcmp( &c1->col, &c2->col, sizeof(glColour) )==0) );
return 1;
}
/**
* @brief Sets the alpha of a colour.
*
* Value is from 0. (transparent) to 1. (opaque).
*
* @usage col:setAlpha( 0.5 ) -- Make colour half transparent
*
* @luaparam col Colour to set alpha of.
* @luaparam alpha Alpha value to set.
* @luafunc setAlpha( col, alpha )
*/
static int colL_setalpha( lua_State *L )
{
LuaColour *lc;
lc = luaL_checkcolour(L,1);
lc->col.a = luaL_checknumber(L,2);
return 0;
}
/**
* @brief Gets the alpha of a colour.
*
* Value is from from 0. (transparent) to 1. (opaque).
*
* @usage colour_alpha = col:alpha()
*
* @luaparam col Colour to get alpha of.
* @luareturn The alpha of the colour.
* @luafunc alpha( col )
*/
static int colL_alpha( lua_State *L )
{
LuaColour *lc;
lc = luaL_checkcolour(L,1);
lua_pushnumber( L, lc->col.a );
return 1;
}
/**
* @brief Prints text on the screen.
*
* @usage gfx.print( nil, "Hello World!", 50, 50, colour.new("Red") ) -- Displays text in red at 50,50.
* @usage gfx.print( true, "Hello World!", 50, 50, col, 100 ) -- Displays text to a maximum of 100 pixels wide.
* @usage gfx.print( true, str, 50, 50, col, 100, true ) -- Displays centered text to a maximum of 100 pixels.
*
* @luaparam small Whether or not to use a small font.
* @luaparam str String to print.
* @luaparam x X position to print at.
* @luaparam y Y position to print at.
* @luaparam col Colour to print text.
* @luaparam max Optional parameter to indicate maximum width to render up to.
* @luaparam center Optional boolean parameter indicating whether or not to center it.
* @luafunc print( small, str, x, y, col, max, center )
*/
static int gfxL_print( lua_State *L )
{
glFont *font;
const char *str;
double x, y;
LuaColour *lc;
int max, mid;
/* Parse parameters. */
font = lua_toboolean(L,1) ? &gl_smallFont : &gl_defFont;
str = luaL_checkstring(L,2);
x = luaL_checknumber(L,3);
y = luaL_checknumber(L,4);
lc = luaL_checkcolour(L,5);
if (lua_gettop(L) >= 6)
max = luaL_checkinteger(L,6);
else
max = 0;
mid = lua_toboolean(L,7);
/* Render. */
if (mid)
gl_printMidRaw( font, max, x, y, &lc->col, str );
else if (max > 0)
gl_printMaxRaw( font, max, x, y, &lc->col, str );
else
gl_printRaw( font, x, y, &lc->col, str );
return 0;
}
/**
* @brief Sets the colours values from the RGB colourspace.
*
* Values are from 0. to 1.
*
* @usage col:setRGB( r, g, b )
*
* @luaparam col Colour to set RGB values.
* @luaparam r Red value to set.
* @luaparam g Green value to set.
* @luaparam b Blue value to set.
* @luafunc setRGB( col, r, g, b )
*/
static int colL_setrgb( lua_State *L )
{
LuaColour *lc;
lc = luaL_checkcolour(L,1);
lc->col.r = luaL_checknumber(L,2);
lc->col.g = luaL_checknumber(L,3);
lc->col.b = luaL_checknumber(L,4);
return 0;
}
/**
* @brief Gets the RGB values of a colour.
*
* Values are from 0. to 1.
*
* @usage r,g,b = col:rgb()
*
* @luaparam col Colour to get RGB values of.
* @luareturn The red, green and blue values of the colour.
* @luafunc rgb( col )
*/
static int colL_rgb( lua_State *L )
{
LuaColour *lc;
lc = luaL_checkcolour(L,1);
lua_pushnumber( L, lc->col.r );
lua_pushnumber( L, lc->col.g );
lua_pushnumber( L, lc->col.b );
return 3;
}
/**
* @brief Gets the HSV values of a colour.
*
* Values are from 0. to 1.
*
* @usage h,s,v = col:rgb()
*
* @luaparam col Colour to get HSV values of.
* @luareturn The hue, saturation and value values of the colour.
* @luafunc hsv( col )
*/
static int colL_hsv( lua_State *L )
{
double h, s, v;
LuaColour *lc;
lc = luaL_checkcolour(L,1);
col_rgb2hsv( &h, &s, &v, lc->col.r, lc->col.g, lc->col.b );
lua_pushnumber( L, h );
lua_pushnumber( L, s );
lua_pushnumber( L, v );
return 3;
}
/**
* @brief Renders a texture.
*
* This function has variable parameters depending on how you want to render.
*
* @usage gfx.renderTex( tex, 0., 0. ) -- Render tex at origin
* @usage gfx.renderTex( tex, 0., 0., col ) -- Render tex at origin with colour col
* @usage gfx.renderTex( tex, 0., 0., 4, 3 ) -- Render sprite at position 4,3 (top-left is 1,1)
* @usage gfx.renderTex( tex, 0., 0., 4, 3, col ) -- Render sprite at position 4,3 (top-left is 1,1) with colour col
*
* @luaparam tex Texture to render.
* @luaparam pos_x X position to render texture at.
* @luaparam pos_y Y position to render texture at.
* @luaparam sprite_x X sprite to render.
* @luaparam sprite_y Y sprite to render.
* @luaparam colour Colour to use when rendering.
* @luafunc renderTex( tex, pos_x, pos_y, sprite_x, sprite_y, colour )
*/
static int gfxL_renderTex( lua_State *L )
{
LuaTex *lt;
LuaColour *lc;
double x, y;
int sx, sy;
/* Parameters. */
lc = NULL;
lt = luaL_checktex( L, 1 );
x = luaL_checknumber( L, 2 );
y = luaL_checknumber( L, 3 );
if (lua_isnumber( L, 4 )) {
sx = luaL_checkinteger( L, 4 ) - 1;
sy = luaL_checkinteger( L, 5 ) - 1;
if (lua_iscolour(L, 6))
lc = luaL_checkcolour(L,6);
}
else {
sx = 0;
sy = 0;
if (lua_iscolour(L, 4))
lc = luaL_checkcolour(L,4);
}
/* Some sanity checking. */
#if DEBUGGING
if (sx >= lt->tex->sx)
NLUA_ERROR( L, "Texture '%s' trying to render out of bounds (X position) sprite: %d > %d.",
lt->tex->name, sx+1, lt->tex->sx );
if (sx >= lt->tex->sx)
NLUA_ERROR( L, "Texture '%s' trying to render out of bounds (Y position) sprite: %d > %d.",
lt->tex->name, sy+1, lt->tex->sy );
#endif /* DEBUGGING */
/* Render. */
gl_blitStaticSprite( lt->tex, x, y, sx, sy, (lc==NULL) ? NULL : &lc->col );
return 0;
}
/**
* @brief Renders a texture.
*
* This function has variable parameters depending on how you want to render.
*
* @usage gfx.renderTex( tex, 0., 0. ) -- Render tex at origin
* @usage gfx.renderTex( tex, 0., 0., col ) -- Render tex at origin with colour col
* @usage gfx.renderTex( tex, 0., 0., 4, 3 ) -- Render sprite at position 4,3 (top-left is 1,1)
* @usage gfx.renderTex( tex, 0., 0., 4, 3, col ) -- Render sprite at position 4,3 (top-left is 1,1) with colour col
*
* @luaparam tex Texture to render.
* @luaparam pos_x X position to render texture at.
* @luaparam pos_y Y position to render texture at.
* @luaparam sprite_x X sprite to render.
* @luaparam sprite_y Y sprite to render.
* @luaparam colour Colour to use when rendering.
* @luafunc renderTex( tex, pos_x, pos_y, sprite_x, sprite_y, colour )
*/
static int gfxL_renderTex( lua_State *L )
{
glTexture *tex;
glColour *col;
double x, y;
int sx, sy;
/* Parameters. */
col = NULL;
tex = luaL_checktex( L, 1 );
x = luaL_checknumber( L, 2 );
y = luaL_checknumber( L, 3 );
if (lua_isnumber( L, 4 )) {
sx = luaL_checkinteger( L, 4 ) - 1;
sy = luaL_checkinteger( L, 5 ) - 1;
if (lua_iscolour(L, 6))
col = luaL_checkcolour(L,6);
}
else {
sx = 0;
sy = 0;
if (lua_iscolour(L, 4))
col = luaL_checkcolour(L,4);
}
/* Some sanity checking. */
#if DEBUGGING
if (sx >= tex->sx)
NLUA_ERROR( L, "Texture '%s' trying to render out of bounds (X position) sprite: %d > %d.",
tex->name, sx+1, tex->sx );
if (sx >= tex->sx)
NLUA_ERROR( L, "Texture '%s' trying to render out of bounds (Y position) sprite: %d > %d.",
tex->name, sy+1, tex->sy );
#endif /* DEBUGGING */
/* Render. */
gl_blitStaticSprite( tex, x, y, sx, sy, col );
return 0;
}
/**
* @brief Sets the colours values from the HSV colourspace.
*
* Values are from 0. to 1.
*
* @usage col:setHSV( h, s, v )
*
* @luaparam col Colour to set HSV values.
* @luaparam h Hue value to set.
* @luaparam s Saturation value to set.
* @luaparam v Value to set.
* @luafunc setHSV( col, h, s, v )
*/
static int colL_sethsv( lua_State *L )
{
double r, g, b, h, s, v;
LuaColour *lc;
lc = luaL_checkcolour(L,1);
h = luaL_checknumber(L,2);
s = luaL_checknumber(L,3);
v = luaL_checknumber(L,4);
col_hsv2rgb( &r, &g, &b, h, s, v );
lc->col.r = r;
lc->col.g = g;
lc->col.b = b;
return 0;
}
/**
* @brief Prints a block of text on the screen.
*
* @usage gfx.printText( true, 100, 50, 50, 100, 100, col ) -- Displays a 100x100 block of text
*
* @luaparam small Whether or not to use a small font.
* @luaparam str String to print.
* @luaparam x X position to print at.
* @luaparam y Y position to print at.
* @luaparam w Width of the block of text.
* @luaparam h Height of the block of text.
* @luaparam col Colour to print text.
* @luafunc printText( small, str, x, y, w, h, col )
*/
static int gfxL_printText( lua_State *L )
{
glFont *font;
const char *str;
int w, h;
double x, y;
LuaColour *lc;
/* Parse parameters. */
font = lua_toboolean(L,1) ? &gl_smallFont : &gl_defFont;
str = luaL_checkstring(L,2);
x = luaL_checknumber(L,3);
y = luaL_checknumber(L,4);
w = luaL_checkinteger(L,5);
h = luaL_checkinteger(L,6);
lc = luaL_checkcolour(L,7);
/* Render. */
gl_printTextRaw( font, w, h, x, y, &lc->col, str );
return 0;
}
/**
* @brief Renders a rectangle.
*
* @usage gfx.renderRect( 10., 30,. 40., 40., col ) -- Renders a 40 side square at position 10,30 of colour col
* @usage gfx.renderRect( 10., 30,. 40., 40., col, True ) -- Renders a 40 side empty square at position 10,30 of colour col
*
* @luaparam x X position to render at.
* @luaparam y Y position to render at.
* @luaparam w Width of the rectangle.
* @luaparam h Height of the rectangle.
* @luaparam col Colour to use.
* @luaparam empty Optional parameter on whether or not it should be empty, defaults to true.
* @luafunc renderRect( x, y, w, h, col, empty )
*/
static int gfxL_renderRect( lua_State *L )
{
LuaColour *lc;
double x,y, w,h;
int empty;
/* Parse parameters. */
x = luaL_checknumber( L, 1 );
y = luaL_checknumber( L, 2 );
w = luaL_checknumber( L, 3 );
h = luaL_checknumber( L, 4 );
lc = luaL_checkcolour( L, 5 );
empty = lua_toboolean( L, 6 );
/* Render. */
if (empty)
gl_renderRectEmpty( x, y, w, h, &lc->col );
else
gl_renderRect( x, y, w, h, &lc->col );
return 0;
}
