mirror of
https://github.com/lxsang/Diya-API.git
synced 2024-12-28 12:28:21 +01:00
151 lines
4.2 KiB
Smalltalk
151 lines
4.2 KiB
Smalltalk
Class {
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#name : #DiyaText,
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#superclass : #Diya2DNode,
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#instVars : [
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'fontStyle',
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'fontSize',
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'fontName',
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'data'
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],
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#pools : [
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'FT2Types'
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],
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#category : #'Diya-Graphics'
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}
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{ #category : #'as yet unclassified' }
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DiyaText class >> data: string [
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^ (self new) data: string; yourself
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]
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{ #category : #'as yet unclassified' }
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DiyaText class >> data: string shader: s [
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^ (self with:s) data: string; yourself
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]
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{ #category : #accessing }
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DiyaText >> data [
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^ data
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]
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{ #category : #accessing }
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DiyaText >> data: anObject [
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data := anObject
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]
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{ #category : #accessing }
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DiyaText >> draw [
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|face offset|
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data ifNil: [ ^self ].
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offset := 100.0@100.0.
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OpenGL enable: GL_CULL_FACE.
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OpenGL enable: GL_BLEND.
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OpenGL blendFnWithSfactor: GL_SRC_ALPHA dfactor: GL_ONE_MINUS_SRC_ALPHA.
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self shader use.
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self shader setUniform: #u_time value: DiyaClock uniqueInstance elapsedTime asFloat.
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self shader setUniform: #u_projection value: context projection buffer.
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self shader setUniform: #u_texture value: 0.
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self shader setUniform: #u_resolution value: { context resolution x. context resolution y }.
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context mouse ifNotNil: [
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"in shader, window origin is bottom left conor of the window
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the mouse position should be transformed to this coodinate"
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shader setUniform: #u_mouse value: { context mouse x. context resolution y - context mouse y }.
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].
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face := DiyaFontManager uniqueInstance face: self fontStyle from: self fontName.
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"set fontsize"
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face setPixelWidth:0 height: self fontSize.
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OpenGL pixelstorei: GL_UNPACK_ALIGNMENT param: 1.
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"configure vao vbo for texture QUAD"
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context vao enableAttribute: 0.
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OpenGLVertexArray vertexAttributePointerIndex: 0 size:4 type: GL_FLOAT normalized: GL_FALSE stride: 16 pointer: nil .
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data do:[:c | self drawCharacter: c at: offset with: face.].
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context vao disableAttribute: 0.
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"reset value"
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OpenGL pixelstorei: GL_UNPACK_ALIGNMENT param: 4.
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OpenGL disable: GL_CULL_FACE.
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OpenGL disable: GL_BLEND.
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]
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{ #category : #accessing }
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DiyaText >> drawCharacter: c at: offset with: face [
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|tex2D|
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face loadCharacter: c asciiValue flags: (1 << 2) "FT_LOAD_RENDER".
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tex2D := OpenGLTexImage2D new target: GL_TEXTURE_2D;
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level: 0;
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internalFormat: GL_RED;
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width: face glyph width;
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height: face glyph height;
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border: 0;
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format: GL_RED;
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type: GL_UNSIGNED_BYTE;
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data: (FTFaceRec fromHandle: face getHandle) glyph bitmap buffer;
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yourself.
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context texture0 setImage2D: tex2D.
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OpenGLTexture parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_WRAP_S param: GL_CLAMP_TO_EDGE.
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OpenGLTexture parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_WRAP_T param: GL_CLAMP_TO_EDGE.
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OpenGLTexture parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_MIN_FILTER param: GL_LINEAR.
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OpenGLTexture parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_MAG_FILTER param: GL_LINEAR.
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"fill the buffer"
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self fillVerticesBuffer: context buffer at: offset with: face.
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context vbo subData: GL_ARRAY_BUFFER offset:0 data: context buffer.
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OpenGL drawArrays: GL_TRIANGLES first:0 count:6.
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offset setX: (offset x + ((face glyph advanceX )* (self scale x)) ) setY: offset y.
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]
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{ #category : #accessing }
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DiyaText >> fillVerticesBuffer: buffer at: offset with: face [
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|x y w h i|
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x := offset x + ((face glyph hBearingX )*(self scale x)).
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y := offset y - (((face glyph height) - (face glyph hBearingY))*(self scale y)).
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w := (face glyph width)*(self scale x).
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h := (face glyph height)*(self scale y).
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i := 1.
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{x. y + h. 0.0. 0.0.
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x. y. 0.0. 1.0.
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x + w. y. 1.0. 1.0.
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x. y + h. 0.0. 0.0.
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x + w. y. 1.0. 1.0.
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x + w. y + h. 1.0. 0.0. }
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do: [ :e| buffer at:i put:e. i := i+1 ]
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]
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{ #category : #accessing }
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DiyaText >> fontName [
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^ fontName
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]
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{ #category : #accessing }
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DiyaText >> fontName: anObject [
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fontName := anObject
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]
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{ #category : #accessing }
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DiyaText >> fontSize [
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^ fontSize
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]
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{ #category : #accessing }
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DiyaText >> fontSize: anObject [
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fontSize := anObject
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]
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{ #category : #accessing }
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DiyaText >> fontStyle [
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^ fontStyle
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]
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{ #category : #accessing }
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DiyaText >> fontStyle: anObject [
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fontStyle := anObject
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]
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{ #category : #initialization }
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DiyaText >> initialize [
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super initialize.
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fontStyle := 'Regular'.
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fontName := 'Ubuntu'.
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fontSize := 40.
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data := nil.
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]
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