Idea for a function to load shaders.

[coconParticipant]

Initially I created this for an OpenGL example, perhaps this could go into mojo.graphics.glutil since it’s pretty reusable code.

 

Monkey

Function glLoadProgram:GLuint(vertexSource:String, fragmentSource:String) Local vs := mojo.graphics.glutil.glCompile(GL_VERTEX_SHADER, vertexSource) Local fs := mojo.graphics.glutil. glCompile(GL_FRAGMENT_SHADER, fragmentSource) Local program := glCreateProgram() glAttachShader(program, vs) glAttachShader(program, fs) mojo.graphics.glutil.glLink(program) glDeleteShader(vs) glDeleteShader(fs) Return program End

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Function glLoadProgram:GLuint(vertexSource:String, fragmentSource:String) Local vs := mojo.graphics.glutil.glCompile(GL_VERTEX_SHADER, vertexSource) Local fs := mojo.graphics.glutil. glCompile(GL_FRAGMENT_SHADER, fragmentSource) Local program := glCreateProgram() glAttachShader(program, vs) glAttachShader(program, fs) mojo.graphics.glutil.glLink(program) glDeleteShader(vs) glDeleteShader(fs) Return program End

[Mark SiblyKeymaster]

The glutil stuff wasn’t really meant to be ‘public’, but it would definitely be nice to have.

Let me clean it up a bit, perhaps move it to GLES20 module(?) etc, then we can start adding fun stuff to it.

[AdamStrangeParticipant]

Mark… Further to this:

I noticed the general rendering of mojo is opengl to a buffer then final shader to screen.

Is there a possibility of opening this shader up so added ‘screen’ shader could be created. E.G. blurs, color to mono, etc

Just a thought

[coconParticipant]

 

On what Adam said, it would be very interesting to use custom user shaders at will. It reminds me of Minecraft where is heavily modded on shaders, beyond any initial plan. I think that this gets closer to a material/shader system (like Unity does).

Here is now a silly hack to make it work, theoretically it should work, but I have not compiled it yet.

In the file mojo.graphics.canvas

Monkey

' This is the default shader of the Monkey renderer (only for shapes) Field _shader:Shader ' This user shader field is added and two methods as well ' to assign/deassign a value to the object. Field _userShader:Shader Method EnableUserShader(s:Shader) _userShader = s End Method DisableUserShader() _userShader = Null End ' Then there will be a smart private property to return either the ' default shader or the user shader.' Property DefaultShader:Shader If _userShader <> Null Then Return _userShader Return _shader End ' Then all of the methods that use the method AddDrawOp will be changed to use ' the smart private property. Method DrawRect( x:Float,y:Float,w:Float,h:Float ) Local x0:=x,y0:=y,x1:=x+w,y1:=y+h AddDrawOp( DefaultShader,_material,_blendMode,_textureFilter,4,1 ) ' etc ... End ' For the record this is the actual method that accepts the shader. ' perhaps instead of changing ALL of the draw methods that use the AddDrawOp, ' the hack could be injected here instead. Method AddDrawOp( shader:Shader,material:UniformBlock,blendMode:BlendMode,textureFilter:TextureFilter,primOrder:int,primCount:Int )

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' This is the default shader of the Monkey renderer (only for shapes) Field _shader:Shader     ' This user shader field is added and two methods as well ' to assign/deassign a value to the object. Field _userShader:Shader Method EnableUserShader(s:Shader) _userShader = s End Method DisableUserShader() _userShader = Null End     ' Then there will be a smart private property to return either the ' default shader or the user shader.' Property DefaultShader:Shader If _userShader <> Null Then Return _userShader Return _shader End     ' Then all of the methods that use the method AddDrawOp will be changed to use ' the smart private property. Method DrawRect( x:Float,y:Float,w:Float,h:Float ) Local x0:=x,y0:=y,x1:=x+w,y1:=y+h AddDrawOp( DefaultShader,_material,_blendMode,_textureFilter,4,1 ) ' etc ... End     ' For the record this is the actual method that accepts the shader. ' perhaps instead of changing ALL of the draw methods that use the AddDrawOp, ' the hack could be injected here instead. Method AddDrawOp( shader:Shader,material:UniformBlock,blendMode:BlendMode,textureFilter:TextureFilter,primOrder:int,primCount:Int )

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