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Implemented fallback mipmap generation when the GL_generate_mipmap extension is not available

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codeanticode
2010-09-15 07:54:00 +00:00
parent 85c3f606cf
commit 13099fc7bb
1 changed files with 36 additions and 2 deletions
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38
android/core/src/processing/core/PTexture.java
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@@ -28,6 +28,8 @@ import java.nio.IntBuffer;
import javax.microedition.khronos.opengles.*;
import javax.microedition.khronos.egl.EGL10;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.opengl.GLUtils;
import java.nio.*;
@@ -293,12 +295,44 @@ public class PTexture implements PConstants {
if (usingMipmaps) {
if (a3d.gl11 != null && PGraphicsAndroid3D.mipmapSupported) {
gl.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_GENERATE_MIPMAP, GL11.GL_TRUE);
gl.glTexSubImage2D(glTarget, 0, 0, 0, glWidth, glHeight, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, IntBuffer.wrap(convArray));
} else {
// TODO: alternative mipmap generation. See the following link for more info:
// Code by Mike Miller obtained from here:
// http://insanitydesign.com/wp/2009/08/01/android-opengl-es-mipmaps/
int level = 0;
int w = glWidth;
int h = glHeight;
// We create a Bitmap because then we use its built-in filtered downsampling
// functionality.
Bitmap bitmap = Bitmap.createBitmap(w, h, Config.ARGB_8888);
bitmap.setPixels(convArray, 0, w, 0, 0, w, h);
while (w >= 1 || h >= 1) {
//First of all, generate the texture from our bitmap and set it to the according level
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, level, bitmap, 0);
// We are done.
if (w == 1 || h == 1) {
break;
}
// Increase the mipmap level
level++;
// Downsampling bitmap
h /= 2;
w /= 2;
Bitmap bitmap2 = Bitmap.createScaledBitmap(bitmap, w, h, true);
// Clean up
bitmap.recycle();
bitmap = bitmap2;
}
}
} else {
gl.glTexSubImage2D(glTarget, 0, 0, 0, glWidth, glHeight, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, IntBuffer.wrap(convArray));
}
gl.glTexSubImage2D(glTarget, 0, 0, 0, glWidth, glHeight, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, IntBuffer.wrap(convArray));
gl.glDisable(glTarget);
}