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|
/* graphics.lua */
static const char* graphics_lua = R"(
jin.graphics = jin.graphics or {}
local jg = jin.graphics
jg.RenderMode = {
FILL = 1,
LINE = 2,
}
jg.SpriteOrigin = {
TOPLEFT = 0,
TOPCENTER = 1,
TOPRIGHT = 2,
MIDDLELEFT = 3,
MIDDLECENTER = 4,
MIDDLERIGHT = 5,
BOTTOMLEFT = 6,
BOTTOMCENTER = 7,
BOTTOMRIGHT = 8
}
jg.SpriteMode = {
SINGLE = 1,
RANDOM = 2,
ANIMATED = 3
}
-- built in shaders
jg.Shaders = {
Font = nil,
Texture = nil,
Sprite = nil,
SpriteSheet = nil,
Default = nil
}
local function compileBuiltInShaders()
jg.Shaders.Font = jg.newShader([[
#VERTEX_SHADER
Vertex vert(Vertex v)
{
return v;
}
#END_VERTEX_SHADER
#FRAGMENT_SHADER
Color frag(Color col, Texture tex, Vertex v)
{
return Color(col.rgb, texel(tex, v.uv).a);
}
#END_FRAGMENT_SHADER
]])
jg.Shaders.Texture = jg.newShader([[
#VERTEX_SHADER
Vertex vert(Vertex v)
{
return v;
}
#END_VERTEX_SHADER
#FRAGMENT_SHADER
Color frag(Color col, Texture tex, Vertex v)
{
return col * texel(tex, v.uv);
}
#END_FRAGMENT_SHADER
]])
jg.Shaders.Sprite = jg.newShader([[
#VERTEX_SHADER
Vertex vert(Vertex v)
{
return v;
}
#END_VERTEX_SHADER
#FRAGMENT_SHADER
Color frag(Color col, Texture tex, Vertex v)
{
return col * texel(tex, v.uv);
}
#END_FRAGMENT_SHADER
]])
jg.Shaders.SpriteSheet = jg.newShader([[
#VERTEX_SHADER
Vertex vert(Vertex v)
{
return v;
}
#END_VERTEX_SHADER
#FRAGMENT_SHADER
Color frag(Color col, Texture tex, Vertex v)
{
return col * texel(tex, v.uv);
}
#END_FRAGMENT_SHADER
]])
jg.Shaders.Default = jg.newShader([[
#VERTEX_SHADER
Vertex vert(Vertex v)
{
return v;
}
#END_VERTEX_SHADER
#FRAGMENT_SHADER
Color frag(Color col, Texture tex, Vertex v)
{
return col * texel(tex, v.uv);
}
#END_FRAGMENT_SHADER
]])
end
local _init = jg.init
local initialized = false
jg.init = function(setting)
if initialized then
return initialized
end
initialized = _init(setting)
if initialized then
compileBuiltInShaders()
jg.useShader(jg.Shaders.Default)
end
return initialized
end
jg.unuseShader = function()
jg.useShader(jg.Shaders.Default)
end
-- Reset all attributes to default value.
jg.reset = function()
jg.setColor(255, 255, 255, 255)
jg.setClearColor(0, 0, 0, 255)
jg.clear()
jg.unsetFont()
jg.unuseShader()
end
)";
|
