image texture support

Diya/Color.extension.st

@@ -1,5 +1,15 @@
 Extension { #name : #Color }
 
+{ #category : #'*Diya' }
+Color >> as4bytesRGB [
+	^{
+		(self red* 255) asInteger.
+		(self green * 255) asInteger.
+		(self blue*255) asInteger.
+		(self alpha* 255) asInteger
+	}
+]
+
 { #category : #'*Diya' }
 Color >> asGL4FArray [
 	^{self red. self green. self blue. self alpha }

Diya/Diya2DPrimShape.class.st

@@ -10,8 +10,6 @@ Class {
 { #category : #initialization }
 Diya2DPrimShape >> draw [
 	vbuffer ifNil: [ ^self ].
-	self shader
-		setUniform: #u_use_texture value:1.
 	"configure vao vbo for texture QUAD"
 	self texture ifNotNil: [
 		self texture setup.
@@ -36,10 +34,10 @@ Diya2DPrimShape >> initialize [
 
 { #category : #initialization }
 Diya2DPrimShape >> setUpShader [
-	super setUpShader.
+	super setUpShader
 	texture ifNotNil:[
 		self shader
-			setUniform: #u_use_texture value:1.
+			setUniform: #u_texture_type value: texture format.
 	].
 ]
 

Diya/Diya2DShader.class.st

@@ -15,17 +15,21 @@ uniform vec2 u_resolution;
 uniform vec2 u_mouse;
 uniform float u_time;
 // 2D uniforms
-uniform int u_use_texture;
+uniform int u_texture_type;
 uniform vec4 u_color;
 uniform vec4 u_border_color;
 uniform sampler2D u_texture;
 varying vec2 texcoord;
 void main(void) {
 	vec4 texcolor = vec4(1,1,1,1);
-	if(u_use_texture == 1)
+	// alpha
-	{
+	if(u_texture_type == 0x1906) { 
 		texcolor = vec4(1, 1, 1, texture2D(u_texture, texcoord).a);
 	}
+	// rgba
+	else if (u_texture_type == 0x1908){ 
+		texcolor =  texture2D(u_texture, texcoord);
+	}
   	gl_FragColor =  texcolor * u_color;
 }'
 ]
@@ -50,7 +54,7 @@ void main()
 { #category : #initialization }
 Diya2DShader >> setUpUniforms [
 	self addUniform: #u_texture of: Uniform1i.
-	self addUniform: #u_use_texture of: Uniform1i.
+	self addUniform: #u_texture_type of: Uniform1i.
 	self addUniform: #u_color of: Uniform4F.
 	self addUniform: #u_border_color of: Uniform4F.
 	self addUniform: #u_border of: Uniform1i.

Diya/DiyaBoot.class.st

@@ -70,13 +70,19 @@ DiyaBoot >> createWindow [
 DiyaBoot >> exampleNodes [
 	|root text rec style|
 	root := DiyaRootNode new.
-	rec := root addNode: (DiyaRectangle size: 208@288) at: 250 @ 200.
+	rec := root addNode: (DiyaRectangle size: 200@200) at: 250 @ 430.
+	rec texture: (DiyaImageTex  fromFile:Smalltalk imageDirectory / 'assets'/'mrsang.png').
+	rec color: (Color r: 1.0 g:1.0  b:1.0  alpha:1.0 ).
+	
 	style := DiyaFontManager uniqueInstance style: 'Bold' from:'Ubuntu'.
-	rec texture: (style textureOf: 16).
+	rec := root addNode: (DiyaRectangle size: 208@288) at: 250 @ 50.
-	rec color: (Color r: 1.0 g:0.0  b:1.0  alpha:1.0 ).
+	rec color: (Color orange).
+	rec texture: (style textureOf: 20).
+	
 	rec := root addNode: (DiyaRectangle size:100@150 shader: DiyaExampleShader uniqueInstance) at: 20 @ 400.
 	rec rotation: (Float pi / -8.0).
 	rec scale: 1.5@1.5.
+	
 	text := root addNode: (DiyaText data: String loremIpsum) at: 20@320.
 	text extent: 200@320.
 	text wordWrap: true.

Diya/DiyaImageTex.class.st

@@ -0,0 +1,74 @@
+Class {
+	#name : #DiyaImageTex,
+	#superclass : #OpenGLTexImage2D,
+	#pools : [
+		'OpenGLConstants',
+		'OpenGLTypes'
+	],
+	#category : #'Diya-Graphics'
+}
+
+{ #category : #'instance creation' }
+DiyaImageTex class >> fromFile: path [
+	^ self new fromFile: path; yourself
+]
+
+{ #category : #accessing }
+DiyaImageTex >> drop [
+	OpenGL
+		disable: GL_CULL_FACE;
+		disable: GL_BLEND.
+]
+
+{ #category : #'instance creation' }
+DiyaImageTex >> fromFile: path [
+	|form color index|
+	form := ImageReadWriter formFromFileNamed: path.
+	data := FFIExternalArray externalNewType: GLubyte size:(form width) * (form height) * 4.
+	LibC memset: data getHandle value: 0 size: data size.
+	data autoRelease.
+	width := form width.
+	height := form height.
+	index := 1.
+	0 to: height -1 do:[:y|
+		0 to: width - 1 do:[:x|
+			color := (form colorAt: x@y) as4bytesRGB.
+			data
+				at: index put: color first;
+				at: index + 1 put: (color at: 2);
+				at: index +2 put: (color at: 3);
+				at: index + 3 put: color last.
+			index := index + 4.
+		]
+	].
+	
+]
+
+{ #category : #'instance creation' }
+DiyaImageTex >> initialize [
+	super initialize.
+	level := 0.
+	border := 0.
+	format := GL_RGBA.
+	internalFormat := GL_RGBA.
+	type := GL_UNSIGNED_BYTE.
+	target := GL_TEXTURE_2D.
+]
+
+{ #category : #accessing }
+DiyaImageTex >> mipmap [
+	^false
+]
+
+{ #category : #accessing }
+DiyaImageTex >> setup [
+	OpenGL
+		enable: GL_CULL_FACE;
+		enable: GL_BLEND;
+		blendFnWithSfactor: GL_SRC_ALPHA dfactor: GL_ONE_MINUS_SRC_ALPHA.
+	OpenGLTexture
+		parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_WRAP_S param: GL_CLAMP_TO_EDGE;
+		parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_WRAP_T param: GL_CLAMP_TO_EDGE;
+		parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_MIN_FILTER param: GL_LINEAR;
+		parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_MAG_FILTER param: GL_LINEAR.
+]

Diya/DiyaText.class.st

@@ -40,7 +40,7 @@ DiyaText >> data: anObject [
 DiyaText >> draw [
 	data ifNil: [ ^self ].
 	self shader
-		setUniform: #u_use_texture value:1.
+		setUniform: #u_texture_type value: self texture format.
 	"configure vao vbo for texture QUAD"
 	self texture setup.
 	context texture0 setImage2D: self texture.

Diya/OpenGLConstants.class.st

@@ -49,6 +49,7 @@ Class {
 		'GL_QUAD_STRIP',
 		'GL_RED',
 		'GL_RGB',
+		'GL_RGBA',
 		'GL_SHADER_SOURCE_LENGTH',
 		'GL_SHADER_TYPE',
 		'GL_SHORT',
@@ -109,6 +110,7 @@ OpenGLConstants class >> initCommonConstants [
 	GL_GREEN := 16r1904.
 	GL_ALPHA := 16r1906.
 	GL_RGB := 16r1907.
+	GL_RGBA := 16r1908.
 ]
 
 { #category : #'class initialization' }

Diya/OpenGLTexImage2D.class.st

@@ -102,6 +102,11 @@ OpenGLTexImage2D >> level: anObject [
 	level := anObject
 ]
 
+{ #category : #accessing }
+OpenGLTexImage2D >> mipmap [
+	^false
+]
+
 { #category : #accessing }
 OpenGLTexImage2D >> setup [
 	^self subclassResponsibility
@@ -117,11 +122,6 @@ OpenGLTexImage2D >> target: anObject [
 	target := anObject
 ]
 
-{ #category : #accessing }
-OpenGLTexImage2D >> teardown [
-	^self subclassResponsibility
-]
-
 { #category : #accessing }
 OpenGLTexImage2D >> type [
 	^ type

Diya/OpenGLTexture.class.st

@@ -52,6 +52,11 @@ OpenGLTexture class >> genTexture: n pointer: textures [
 	^ self ffiCall: #(void glGenTextures(GLsizei n,GLuint * textures))
 ]
 
+{ #category : #'as yet unclassified' }
+OpenGLTexture class >> generateMipmap: target [
+	^self ffiCall: #(void glGenerateMipmap(GLenum target))
+]
+
 { #category : #'as yet unclassified' }
 OpenGLTexture class >> image2D: target level: level internalformat: internalformat w: width h: height border: border format: fmt type: type data: data [
 	^ self ffiCall: #(void glTexImage2D(	GLenum target,GLint level,GLint internalformat,GLsizei width,GLsizei height,GLint border,GLenum fmt,GLenum type,const void * data))
@@ -110,6 +115,9 @@ OpenGLTexture >> setImage2D: tex2D [
 		format: tex2D format
 		type: tex2D type
 		data: tex2D data getHandle.
+	tex2D mipmap ifTrue:[
+		self class generateMipmap: tex2D target	
+	].
 ]
 
 { #category : #initialization }