private void uploadToGL(GL11 gl) throws GLOutOfMemoryException {
Bitmap bitmap = getBitmap();
int glError = GL11.GL_NO_ERROR;
if (bitmap != null) {
int[] textureId = new int[1];
try {
// Define a vertically flipped crop rectangle for
// OES_draw_texture.
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int[] cropRect = {0, height, width, -height};
// Upload the bitmap to a new texture.
gl.glGenTextures(1, textureId, 0);
gl.glBindTexture(GL11.GL_TEXTURE_2D, textureId[0]);
gl.glTexParameteriv(GL11.GL_TEXTURE_2D, GL11Ext.GL_TEXTURE_CROP_RECT_OES, cropRect, 0);
gl.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
int widthExt = Util.nextPowerOf2(width);
int heightExt = Util.nextPowerOf2(height);
int format = GLUtils.getInternalFormat(bitmap);
int type = GLUtils.getType(bitmap);
mTextureWidth = widthExt;
mTextureHeight = heightExt;
gl.glTexImage2D(GL11.GL_TEXTURE_2D, 0, format, widthExt, heightExt, 0, format, type, null);
GLUtils.texSubImage2D(GL11.GL_TEXTURE_2D, 0, 0, 0, bitmap, format, type);
} finally {
freeBitmap(bitmap);
}
if (glError == GL11.GL_OUT_OF_MEMORY) {
throw new GLOutOfMemoryException();
}
if (glError != GL11.GL_NO_ERROR) {
mId = 0;
mState = STATE_UNLOADED;
throw new RuntimeException("Texture upload fail, glError " + glError);
} else {
// Update texture state.
mGL = gl;
mId = textureId[0];
mState = BitmapTexture.STATE_LOADED;
}
} else {
mState = STATE_ERROR;
throw new RuntimeException("Texture load fail, no bitmap");
}
}
public void copyTexture2D(RawTexture texture, int x, int y, int width, int height)
throws GLOutOfMemoryException {
Matrix matrix = mTransformation.getMatrix();
matrix.getValues(mMatrixValues);
if (isMatrixRotatedOrFlipped(mMatrixValues)) {
throw new IllegalArgumentException("cannot support rotated matrix");
}
float points[] = mapPoints(matrix, x, y + height, x + width, y);
x = (int) points[0];
y = (int) points[1];
width = (int) points[2] - x;
height = (int) points[3] - y;
GL11 gl = mGL;
int newWidth = Util.nextPowerOf2(width);
int newHeight = Util.nextPowerOf2(height);
int glError = GL11.GL_NO_ERROR;
gl.glBindTexture(GL11.GL_TEXTURE_2D, texture.getId());
int[] cropRect = {0, 0, width, height};
gl.glTexParameteriv(GL11.GL_TEXTURE_2D, GL11Ext.GL_TEXTURE_CROP_RECT_OES, cropRect, 0);
gl.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
gl.glCopyTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, x, y, newWidth, newHeight, 0);
glError = gl.glGetError();
if (glError == GL11.GL_OUT_OF_MEMORY) {
throw new GLOutOfMemoryException();
}
if (glError != GL11.GL_NO_ERROR) {
throw new RuntimeException("Texture copy fail, glError " + glError);
}
texture.setSize(width, height);
texture.setTextureSize(newWidth, newHeight);
}
/**
* Stretches the texture according to the nine-patch rules. It will linearly distribute the
* strechy parts defined in the nine-patch chunk to the target area.
*
* <pre>
* source
* /--------------^---------------\
* u0 u1 u2 u3 u4 u5
* div ---> |fffff|ssssssss|fff|ssssss|ffff| ---> u
* | div0 div1 div2 div3 |
* | | / / / /
* | | / / / /
* | | / / / /
* |fffff|ssss|fff|sss|ffff| ---> x
* x0 x1 x2 x3 x4 x5
* \----------v------------/
* target
*
* f: fixed segment
* s: stretchy segment
* </pre>
*
* @param div the stretch parts defined in nine-patch chunk
* @param source the length of the texture
* @param target the length on the drawing plan
* @param u output, the positions of these dividers in the texture coordinate
* @param x output, the corresponding position of these dividers on the drawing plan
* @return the number of these dividers.
*/
private int stretch(int x[], float u[], int div[], int source, int target) {
int textureSize = Util.nextPowerOf2(source);
float textureBound = (source - 0.5f) / textureSize;
int stretch = 0;
for (int i = 0, n = div.length; i < n; i += 2) {
stretch += div[i + 1] - div[i];
}
float remaining = target - source + stretch;
int lastX = 0;
int lastU = 0;
x[0] = 0;
u[0] = 0;
for (int i = 0, n = div.length; i < n; i += 2) {
// fixed segment
x[i + 1] = lastX + (div[i] - lastU);
u[i + 1] = Math.min((float) div[i] / textureSize, textureBound);
// stretchy segment
float partU = div[i + 1] - div[i];
int partX = (int) (remaining * partU / stretch + 0.5f);
remaining -= partX;
stretch -= partU;
lastX = x[i + 1] + partX;
lastU = div[i + 1];
x[i + 2] = lastX;
u[i + 2] = Math.min((float) lastU / textureSize, textureBound);
}
// the last fixed segment
x[div.length + 1] = target;
u[div.length + 1] = textureBound;
// remove segments with length 0.
int last = 0;
for (int i = 1, n = div.length + 2; i < n; ++i) {
if (x[last] == x[i]) continue;
x[++last] = x[i];
u[last] = u[i];
}
return last + 1;
}