allow get texture from screen, VM bug on device

Diya/DiyaEvent.class.st

@@ -3,7 +3,8 @@ Class {
 	#superclass : #DiyaBaseObject,
 	#instVars : [
 		'enable',
-		'mapped'
+		'mapped',
+		'target'
 	],
 	#category : #'Diya-Events'
 }
@@ -38,3 +39,13 @@ DiyaEvent >> mapped: anObject [
 DiyaEvent >> preventDefault [
 	enable := false
 ]
+
+{ #category : #accessing }
+DiyaEvent >> target [
+	^ target
+]
+
+{ #category : #accessing }
+DiyaEvent >> target: anObject [
+	target := anObject
+]

Diya/DiyaExampleApp.class.st

@@ -67,7 +67,7 @@ DiyaExampleApp >> main [
 
 { #category : #accessing }
 DiyaExampleApp >> setup [
-	|node node1 ell label icon button|
+	|node node1 img ell label icon button|
 
 	"DiyaRendererContext uniqueInstance assets
 		addAsset:
@@ -84,9 +84,19 @@ DiyaExampleApp >> setup [
 	node1 on: #(mousebuttondown fingerdown) do:[:e|
 		label txt: 'Mouse ', (node1 local: e mapped worldPosition) asIntegerPoint asString].
 	
-	node := root addNode: (DiyaImageView from:'mrsang.png') at: 10 @ 400.
-	node styleName: #image_view.
-	node extent:200@200.
+	img := root addNode: (DiyaImageView from:'mrsang.png') at: 10 @ 400.
+	img styleName: #image_view.
+	img extent:200@200.
+	root on: #(mousebuttondown fingerdown) do:[:e|
+		"change texture"
+		|p|
+		p := e mapped worldPosition.
+		label txt: 'Mouse ', p asIntegerPoint asString.
+		DiyaRendererContext uniqueInstance assets
+			addAsset:(DiyaImageTex fromDisplay: (Rectangle origin: ((p x - 100) @ (p y - 100)) extent: 200@200 ) as: 'capture').
+		img textureNamed: 'capture'.
+		
+	].
 	
 	node := root addNode: (DiyaRectangle new) at: 10@80.
 	node styleName: #rect_view.

Diya/DiyaImageTex.class.st

@@ -12,6 +12,16 @@ Class {
 	#category : #'Diya-Graphics'
 }
 
+{ #category : #'instance creation' }
+DiyaImageTex class >> fromDisplay:  aRect as: assetName [
+	^ self new fromDisplay: aRect as: assetName; yourself 
+]
+
+{ #category : #'instance creation' }
+DiyaImageTex class >> fromDisplayAs: assetName [
+	^ self new fromDisplayAs: assetName; yourself 
+]
+
 { #category : #'instance creation' }
 DiyaImageTex class >> fromFile: path [
 	^ self new fromFile: path; yourself
@@ -24,9 +34,59 @@ DiyaImageTex >> drop [
 		disable: GL_BLEND."
 ]
 
+{ #category : #capture }
+DiyaImageTex >> flipY [
+	|buffer idx idxf|
+	buffer := FFIExternalArray externalNewType: GLubyte size: width * height * 4.
+	LibC memset: buffer getHandle value: 0 size: buffer size.
+	buffer autoRelease.
+	0 to: height - 1 do:[:y|
+		0 to: width - 1 do:[:x|
+			idx := ((y * width) + x)*4 + 1.
+			idxf := ((height - y)*width + x)*4 + 1.
+			buffer at: idx put: (data at: idxf).
+			buffer at: idx+1 put: (data at: idxf+1).
+			buffer at: idx+2 put: (data at: idxf+2).
+			buffer at: idx+3 put: (data at: idxf+3).
+		].	
+	].
+	data free.
+	data := buffer.
+	
+	
+]
+
+{ #category : #capture }
+DiyaImageTex >> fromDisplay:  aRect as: assetName [
+	surface ifNotNil: [ surface free ] ifNil: [data ifNotNil: [data free]].
+	surface := nil.
+	Transcript show:'allocate ', ((aRect extent x) * (aRect extent y) * 4) asInteger asString,' bytes';cr.
+	data := FFIExternalArray externalNewType: GLubyte size:((aRect extent x) * (aRect extent y) * 4) asInteger.
+	LibC memset: data getHandle value: 0 size: data size.
+	data autoRelease.
+	OpenGL readPixelsOn: data getHandle
+		x: aRect origin x
+		y: (DiyaDisplay height) - (aRect origin y) - (aRect extent y)
+		w: aRect extent x
+		h: aRect extent y
+		format:GL_RGBA
+		type: GL_UNSIGNED_BYTE.
+	width := aRect extent x.
+	height := aRect extent y.
+	name := assetName.
+	self flipY.
+	
+]
+
+{ #category : #capture }
+DiyaImageTex >> fromDisplayAs: assetName [
+	self fromDisplay: (Rectangle origin: 0@0 extent: DiyaDisplay extent ) as: assetName 
+]
+
 { #category : #'instance creation' }
 DiyaImageTex >> fromFile: aPath [
 	Transcript show: 'Loading texture from ', aPath fullName;cr.
+	name := aPath.
 	aPath exists ifFalse: [ ^DiyaCoreAPIError signal:'File not found ', aPath fullName ].
 	surface := SDL2Image SDLImgLoad: aPath fullName.
 	surface ifNil: [ ^DiyaCoreAPIError signal:'Unable to load ', aPath fullName ].

Diya/DiyaNode.class.st

@@ -266,7 +266,9 @@ DiyaNode >> tf [
 { #category : #'event handling' }
 DiyaNode >> trigger: evt [
 	evt enable ifFalse:[^self].
-	ehandlers at: evt mapped type ifPresent:[:handler| handler value: evt].
+	ehandlers at: evt mapped type ifPresent:[:handler|
+		evt target: self.
+		handler value: evt].
 	children ifNil: [^self].
 	evt enable ifTrue: [
 		"evt mapped triggableOn: children first."

Diya/ImageInitializer.class.st

@@ -62,6 +62,7 @@ ImageInitializer >> initializeImage [
 	FFIMethodRegistry resetAll.
 	Smalltalk garbageCollect.
 	SourceFiles := SourceFileArray new.
+	"Smalltalk vm parameterAt: 45 put: (Smalltalk vm parameterAt: 44) * 2."
 	Transcript show: 'Image initialized'; cr.
 ]
 

Diya/LibC.extension.st

@@ -1,5 +1,16 @@
 Extension { #name : #LibC }
 
+{ #category : #'*Diya' }
+LibC class >> alloc: size [
+	^self uniqueInstance alloc: size
+]
+
+{ #category : #'*Diya' }
+LibC >> alloc:size [
+	^self ffiCall: #(void *malloc(size_t size))
+	
+]
+
 { #category : #'*Diya' }
 LibC >> memset:pointer value: value size: size [
 	^self ffiCall: #(void *memset(void *pointer, int value, size_t size))

Diya/OpenGL.class.st

@@ -93,6 +93,11 @@ OpenGL class >> pixelstorei: pname param: param [
 	^self ffiCall: #(void glPixelStorei(	GLenum pname,GLint param))
 ]
 
+{ #category : #geometry }
+OpenGL class >> readPixelsOn: buffer x:x y: y w:w h:h format: fmt type: type [
+	^ self ffiCall: #(void glReadPixels(	GLint x,GLint y,GLsizei w,GLsizei h,GLenum fmt,GLenum type,void * buffer))
+]
+
 { #category : #accessing }
 OpenGL class >> vertex3fX:x Y:y Z:z [
 	^self ffiCall: #(void glVertex3f(	GLfloat x,GLfloat y,GLfloat z))

Diya/OpenGLTexImage2D.class.st

@@ -59,7 +59,7 @@ OpenGLTexImage2D >> drop [
 
 { #category : #accessing }
 OpenGLTexImage2D >> extent [
-	^ width @ height 
+	^ self width @ self height
 ]
 
 { #category : #accessing }