/**
* 将LImage转化为LTextureData
*
* @param image
* @return
*/
private void create(LImage image) {
if (image == null) {
return;
}
int srcWidth = image.getWidth();
int srcHeight = image.getHeight();
this.hasAlpha = image.hasAlpha();
if (GLEx.isPowerOfTwo(srcWidth) && GLEx.isPowerOfTwo(srcHeight)) {
this.width = srcWidth;
this.height = srcHeight;
this.texHeight = srcHeight;
this.texWidth = srcWidth;
this.source = image.getByteBuffer();
this.pixels = image.getPixels();
if (image.isAutoDispose()) {
image.dispose();
image = null;
}
return;
}
int texWidth = GLEx.toPowerOfTwo(srcWidth);
int texHeight = GLEx.toPowerOfTwo(srcHeight);
this.width = srcWidth;
this.height = srcHeight;
this.texHeight = texHeight;
this.texWidth = texWidth;
LImage texImage = new LImage(texWidth, texHeight, hasAlpha);
LGraphics g = texImage.getLGraphics();
g.drawImage(image, 0, 0);
if (this.height < texHeight - 1) {
copyArea(texImage, g, 0, 0, width, 1, 0, texHeight - 1);
copyArea(texImage, g, 0, height - 1, width, 1, 0, 1);
}
if (this.width < texWidth - 1) {
copyArea(texImage, g, 0, 0, 1, height, texWidth - 1, 0);
copyArea(texImage, g, width - 1, 0, 1, height, 1, 0);
}
this.source = texImage.getByteBuffer();
this.pixels = texImage.getPixels();
if (image.isAutoDispose()) {
image.dispose();
image = null;
}
}
/**
* 复制指定的LImage图像区域
*
* @param image
* @param g
* @param x
* @param y
* @param width
* @param height
* @param dx
* @param dy
*/
public static void copyArea(
LImage image, LGraphics g, int x, int y, int width, int height, int dx, int dy) {
LImage tmp = image.getSubImage(x, y, width, height);
g.drawImage(tmp, x + dx, y + dy);
tmp.dispose();
tmp = null;
}