1 files changed, 136 insertions, 0 deletions
diff --git a/src/libjin-lua/embed/scripts/graphics/graphics.lua b/src/libjin-lua/embed/scripts/graphics/graphics.lua
new file mode 100644
index 0000000..41c481c
--- /dev/null
+++ b/src/libjin-lua/embed/scripts/graphics/graphics.lua
@@ -0,0 +1,136 @@
+
+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