mirror of
https://github.com/lxsang/Diya-API.git
synced 2024-12-28 04:18:21 +01:00
134 lines
3.4 KiB
Smalltalk
134 lines
3.4 KiB
Smalltalk
Class {
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#name : #DiyaImageTex,
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#superclass : #OpenGLTexImage2D,
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#instVars : [
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'name',
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'surface'
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],
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#pools : [
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'OpenGLConstants',
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'OpenGLTypes'
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],
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#category : #'Diya-Graphics'
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}
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{ #category : #'instance creation' }
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DiyaImageTex class >> fromDisplay: aRect as: assetName [
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^ self new fromDisplay: aRect as: assetName; yourself
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]
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{ #category : #'instance creation' }
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DiyaImageTex class >> fromDisplayAs: assetName [
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^ self new fromDisplayAs: assetName; yourself
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]
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{ #category : #'instance creation' }
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DiyaImageTex class >> fromFile: path [
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^ self new fromFile: path; yourself
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]
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{ #category : #accessing }
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DiyaImageTex >> drop [
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"OpenGL
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disable: GL_CULL_FACE;
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disable: GL_BLEND."
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]
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{ #category : #capture }
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DiyaImageTex >> flipY [
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|buffer idx idxf|
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buffer := FFIExternalArray externalNewType: GLubyte size: width * height * 4.
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LibC memset: buffer getHandle value: 0 size: buffer size.
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buffer autoRelease.
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0 to: height - 1 do:[:y|
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0 to: width - 1 do:[:x|
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idx := ((y * width) + x)*4 + 1.
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idxf := ((height - y)*width + x)*4 + 1.
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buffer at: idx put: (data at: idxf).
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buffer at: idx+1 put: (data at: idxf+1).
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buffer at: idx+2 put: (data at: idxf+2).
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buffer at: idx+3 put: (data at: idxf+3).
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].
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].
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data free.
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data := buffer.
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]
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{ #category : #capture }
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DiyaImageTex >> fromDisplay: aRect as: assetName [
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surface ifNotNil: [ surface free ] ifNil: [data ifNotNil: [data free]].
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surface := nil.
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Transcript show:'allocate ', ((aRect extent x) * (aRect extent y) * 4) asInteger asString,' bytes';cr.
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data := FFIExternalArray externalNewType: GLubyte size:((aRect extent x) * (aRect extent y) * 4) asInteger.
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LibC memset: data getHandle value: 0 size: data size.
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data autoRelease.
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OpenGL readPixelsOn: data getHandle
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x: aRect origin x
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y: (DiyaDisplay height) - (aRect origin y) - (aRect extent y)
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w: aRect extent x
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h: aRect extent y
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format:GL_RGBA
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type: GL_UNSIGNED_BYTE.
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width := aRect extent x.
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height := aRect extent y.
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name := assetName.
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self flipY.
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]
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{ #category : #capture }
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DiyaImageTex >> fromDisplayAs: assetName [
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self fromDisplay: (Rectangle origin: 0@0 extent: DiyaDisplay extent ) as: assetName
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]
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{ #category : #'instance creation' }
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DiyaImageTex >> fromFile: aPath [
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Transcript show: 'Loading texture from ', aPath fullName;cr.
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name := aPath.
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aPath exists ifFalse: [ ^DiyaCoreAPIError signal:'File not found ', aPath fullName ].
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surface := SDL2Image SDLImgLoad: aPath fullName.
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surface ifNil: [ ^DiyaCoreAPIError signal:'Unable to load ', aPath fullName ].
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width := surface w.
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height := surface h.
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data := surface pixels.
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surface autoRelease.
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Transcript show: 'Loaded ', aPath fullName;cr.
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]
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{ #category : #'instance creation' }
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DiyaImageTex >> initialize [
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super initialize.
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level := 0.
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border := 0.
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format := GL_RGBA.
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internalFormat := GL_RGBA.
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type := GL_UNSIGNED_BYTE.
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target := GL_TEXTURE_2D.
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]
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{ #category : #accessing }
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DiyaImageTex >> mipmap [
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^false
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]
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{ #category : #accessing }
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DiyaImageTex >> name [
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^ name
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]
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{ #category : #accessing }
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DiyaImageTex >> setup [
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OpenGLTexture
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parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_WRAP_S param: GL_CLAMP_TO_EDGE;
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parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_WRAP_T param: GL_CLAMP_TO_EDGE;
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parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_MIN_FILTER param: GL_LINEAR;
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parameteri: GL_TEXTURE_2D pname: GL_TEXTURE_MAG_FILTER param: GL_LINEAR.
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]
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{ #category : #accessing }
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DiyaImageTex >> surface [
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^ surface
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]
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