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BitmapTextureResource: auto resize for GPU option

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Yaski
2012-07-19 01:05:05 +06:00
parent 67bb6b7d58
commit bab164f9f8
1 changed files with 33 additions and 11 deletions
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44
src/alternativa/engine3d/resources/BitmapTextureResource.as
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@@ -33,17 +33,21 @@ package alternativa.engine3d.resources {
static private const rect:Rectangle = new Rectangle(); static private const rect:Rectangle = new Rectangle();
static private const filter:ConvolutionFilter = new ConvolutionFilter(2, 2, [1, 1, 1, 1], 4, 0, false, true); static private const filter:ConvolutionFilter = new ConvolutionFilter(2, 2, [1, 1, 1, 1], 4, 0, false, true);
static private const matrix:Matrix = new Matrix(0.5, 0, 0, 0.5); static private const matrix:Matrix = new Matrix(0.5, 0, 0, 0.5);
static private const resizeMatrix:Matrix = new Matrix(1, 0, 0, 1);
static private const point:Point = new Point(); static private const point:Point = new Point();
/** /**
* BitmapData * BitmapData
*/ */
public var data:BitmapData; public var data:BitmapData;
public var resizeForGPU:Boolean = false;
/** /**
* Uploads textures from <code>BitmapData</code> to GPU. * Uploads textures from <code>BitmapData</code> to GPU.
*/ */
public function BitmapTextureResource(data:BitmapData) { public function BitmapTextureResource(data:BitmapData, resizeToPowerOfTwo:Boolean = false) {
this.data = data; this.data = data;
this.resizeForGPU = resizeToPowerOfTwo;
} }
/** /**
@@ -52,26 +56,43 @@ package alternativa.engine3d.resources {
override public function upload(context3D:Context3D):void { override public function upload(context3D:Context3D):void {
if (_texture != null) _texture.dispose(); if (_texture != null) _texture.dispose();
if (data != null) { if (data != null) {
_texture = context3D.createTexture(data.width, data.height, Context3DTextureFormat.BGRA, false); var source:BitmapData = data;
filter.preserveAlpha = !data.transparent; if (resizeForGPU) {
Texture(_texture).uploadFromBitmapData(data, 0); // TODO: test this
var wLog2Num:Number = Math.log(data.width)/Math.LN2;
var hLog2Num:Number = Math.log(data.height)/Math.LN2;
var wLog2:int = Math.ceil(wLog2Num);
var hLog2:int = Math.ceil(hLog2Num);
if (wLog2 != wLog2Num || hLog2 != hLog2Num || wLog2 > 11 || hLog2 > 11) {
// Resize bitmap
wLog2 = (wLog2 > 11) ? 11 : wLog2;
hLog2 = (hLog2 > 11) ? 11 : hLog2;
source = new BitmapData(1 << wLog2, 1 << hLog2, data.transparent, 0x0);
resizeMatrix.a = (1 << wLog2)/data.width;
resizeMatrix.d = (1 << hLog2)/data.height;
source.draw(data, resizeMatrix, null, null, null, true);
}
}
_texture = context3D.createTexture(source.width, source.height, Context3DTextureFormat.BGRA, false);
Texture(_texture).uploadFromBitmapData(source, 0);
filter.preserveAlpha = !source.transparent;
var level:int = 1; var level:int = 1;
var bmp:BitmapData = new BitmapData(data.width, data.height, data.transparent); var bmp:BitmapData = new BitmapData(source.width, source.height, source.transparent);
var current:BitmapData = data; var current:BitmapData = source;
rect.width = data.width; rect.width = source.width;
rect.height = data.height; rect.height = source.height;
while (rect.width%2 == 0 || rect.height%2 == 0) { while (rect.width%2 == 0 || rect.height%2 == 0) {
bmp.applyFilter(current, rect, point, filter); bmp.applyFilter(current, rect, point, filter);
rect.width >>= 1; rect.width >>= 1;
rect.height >>= 1; rect.height >>= 1;
if (rect.width == 0) rect.width = 1; if (rect.width == 0) rect.width = 1;
if (rect.height == 0) rect.height = 1; if (rect.height == 0) rect.height = 1;
if (current != data) current.dispose(); if (current != source) current.dispose();
current = new BitmapData(rect.width, rect.height, data.transparent, 0); current = new BitmapData(rect.width, rect.height, source.transparent, 0);
current.draw(bmp, matrix, null, null, null, false); current.draw(bmp, matrix, null, null, null, false);
Texture(_texture).uploadFromBitmapData(current, level++); Texture(_texture).uploadFromBitmapData(current, level++);
} }
if (current != data) current.dispose(); if (current != source) current.dispose();
bmp.dispose(); bmp.dispose();
} else { } else {
_texture = null; _texture = null;
@@ -81,6 +102,7 @@ package alternativa.engine3d.resources {
/** /**
* @private * @private
* TODO: remove repeated method.
*/ */
alternativa3d function createMips(texture:Texture, bitmapData:BitmapData):void { alternativa3d function createMips(texture:Texture, bitmapData:BitmapData):void {
rect.width = bitmapData.width; rect.width = bitmapData.width;