/******************************************************************************
*	File		-	DefaultShaders.h
*	Author		-	Joey Pollack
*	Date		-	2018/01/12 (y/m/d)
*	Mod Date	-	2018/01/12 (y/m/d)
*	Description	-	String definitions with default shader source code.
*
******************************************************************************/

#ifndef DEFAULT_SHADERS_H_
#define DEFAULT_SHADERS_H_

namespace lunarium
{
	struct
	{
		friend class OglGraphics;
	private:
		const char* DefaultShapeVertex = "#version 330 core\n\
			layout(location = 0) in vec4 vertex;\
	\
			uniform mat4 model;\
			uniform mat4 projection;\
				\
			void main()\
			{\
				gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);\
			}";

		const char* DefaultShapeFragment = "#version 330 core\n\
			in vec2 TexCoords;\
			out vec4 color;\
	\
			uniform vec4 shapeColor;\
	\
			void main()\
			{\
				color = shapeColor;\
			}";

		const char* DefaultSpriteVertex = "#version 330 core\n\
			layout(location = 0) in vec4 vertex;\
	\
			out vec2 TexCoords;\
	\
			uniform vec4 uvManip;\
			uniform mat4 model;\
			uniform mat4 projection;\
				\
			void main()\
			{\
				TexCoords = vec2(vertex.z * uvManip.x + uvManip.y, vertex.w * uvManip.z + uvManip.w);\
				gl_Position = projection * model * vec4(vertex.xy, 0.0, 1.0);\
			}";

		const char* DefaultSpriteFragment = "#version 330 core\n\
			in vec2 TexCoords;\
			out vec4 color;\
	\
			uniform sampler2D image;\
			uniform vec4 spriteColor;\
	\
			void main()\
			{\
				color = vec4(spriteColor) * texture(image, TexCoords);\
			}";

		const char* DefaultTextVertex = "#version 330 core\n\
			layout(location = 0) in vec4 vertex; \
			out vec2 TexCoords;\
	\
			uniform mat4 projection;\
	\
			void main()\
			{\
				gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);\
				TexCoords = vertex.zw;\
			} ";

		const char* DefaultTextFragment = "#version 330 core\n\
			in vec2 TexCoords;\
			out vec4 color;\
	\
			uniform sampler2D text;\
			uniform vec4 textColor;\
	\
			void main()\
			{\
				vec4 sampled = vec4(1.0, 1.0, 1.0, texture(text, TexCoords).r);\
				color = vec4(textColor) * sampled;\
			}";

	} OGLDefaultShaders;
}

#endif	// DEFAULT_SHADERS_H_