public static int loadTiledTexture(int file) {
GL.glGenTextures(1, singleID, 0);
GL.glBindTexture(GL.GL_TEXTURE_2D, singleID[0]);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_REPEAT);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_REPEAT);
InputStream is = Resource.getResInputStream(file);
Bitmap bitmap = null;
try {
bitmap = BitmapFactory.decodeStream(is);
} catch (Exception e) {
Log.e(TAG, "Could not read texture file " + file, e);
return 0;
} finally {
try {
is.close();
} catch (Exception e) {
Log.e(TAG, "Error closing stream", e);
}
}
if (bitmap != null) {
GLUtils.texImage2D(GL.GL_TEXTURE_2D, 0, bitmap, 0);
bitmap.recycle();
} else {
Log.e(TAG, "Could not read bitmap " + file);
return 0;
}
return singleID[0];
}
public static int loadMipMappedTexture(Bitmap bitmap) {
GL.glGenTextures(1, singleID, 0);
int textureID = singleID[0];
GL.glBindTexture(GL.GL_TEXTURE_2D, textureID);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR_MIPMAP_LINEAR);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_REPEAT);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_REPEAT);
if (autoMipMap) {
// To use automatic mipmap generation
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_GENERATE_MIPMAP, GL.GL_TRUE);
GLUtils.texImage2D(GL.GL_TEXTURE_2D, 0, bitmap, 0);
return textureID;
}
// Original code is buggy on certain devices ("HTC Desire S", "Motorola Milestone (Droid) 3
// XT860 Android 2.3.5 Gingerbread")
// Need conversion as a workaround
Bitmap oldBitmap = bitmap;
bitmap = oldBitmap.copy(Bitmap.Config.ARGB_8888, true);
if (bitmap == null) return 0;
oldBitmap.recycle();
int level = 0;
int height = bitmap.getHeight();
int width = bitmap.getWidth();
while (height >= 1 || width >= 1) {
// First of all, generate the texture from our bitmap and set it to the according level
GLUtils.texImage2D(GL.GL_TEXTURE_2D, level, bitmap, 0);
if (height == 1 && width == 1) break;
// Increase the mipmap level
level++;
height /= 2;
if (height == 0) height = 1;
width /= 2;
if (width == 0) width = 1;
Bitmap bitmap2 = Bitmap.createScaledBitmap(bitmap, width, height, true);
// Clean up
bitmap.recycle();
bitmap = bitmap2;
}
return textureID;
}
/**
* Sets a specified texture's OpenGL <code>Texture</code> parameters.
*
* @param dc the current draw context.
* @param texture the texture whose parameters to set.
*/
protected void setTextureParameters(DrawContext dc, Texture texture) {
// Enable the appropriate mip-mapping texture filters if the caller has specified that
// mip-mapping should be
// enabled, and the texture itself supports mip-mapping.
boolean useMipMapFilter =
this.useMipMaps
&& (this.getTextureData().getMipmapData() != null
|| texture.isUsingAutoMipmapGeneration());
GL gl = dc.getGL();
gl.glTexParameteri(
GL.GL_TEXTURE_2D,
GL.GL_TEXTURE_MIN_FILTER,
useMipMapFilter ? GL.GL_LINEAR_MIPMAP_LINEAR : GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
if (this.isUseAnisotropy() && useMipMapFilter) {
double maxAnisotropy = dc.getGLRuntimeCapabilities().getMaxTextureAnisotropy();
if (dc.getGLRuntimeCapabilities().isUseAnisotropicTextureFilter() && maxAnisotropy >= 2.0) {
gl.glTexParameterf(
GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAX_ANISOTROPY_EXT, (float) maxAnisotropy);
}
}
}
public static boolean loadTexture(int glId, Bitmap bitmap) {
GL.glBindTexture(GL.GL_TEXTURE_2D, glId);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_REPEAT);
GL.glTexParameterf(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_REPEAT);
if (bitmap != null) {
GLUtils.texImage2D(GL.GL_TEXTURE_2D, 0, bitmap, 0);
bitmap.recycle();
} else {
Log.e(TAG, "Bitmap null!");
return false;
}
return true;
}
/**
* Sets the OpenGL floating-point texture parameter for the texture's target. This gives control
* over parameters such as GL_TEXTURE_MAX_ANISOTROPY_EXT. Causes this texture to be bound to the
* current texture state.
*
* @throws GLException if no OpenGL context was current or if any OpenGL-related errors occurred
*/
public void setTexParameterf(int parameterName, float value) {
bind();
GL gl = GLU.getCurrentGL();
gl.glTexParameterf(target, parameterName, value);
}