Revision f85f2943
Added by Leszek Koltunski about 2 years ago
| src/main/java/org/distorted/library/main/DistortedTexture.java | ||
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public class DistortedTexture extends InternalSurface |
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{
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private Bitmap mBmp; |
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private boolean mBitmapInverted; |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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// We have to flip vertically every single Bitmap that we get fed with.
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// We have to vertically flip all the bitmaps passed here via setTexture().
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// |
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// Reason: textures read from files are the only objects in OpenGL which have their origins at the |
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// upper-left corner. Everywhere else the origin is in the lower-left corner. Thus we have to flip. |
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// The alternative solution, namely inverting the y-coordinate of the TexCoord does not really work- |
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// i.e. it works only in case of rendering directly to the screen, but if we render to an FBO and |
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// then take the FBO and render to screen, (DistortedNode does so!) things get inverted as textures |
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// created from FBO have their origins in the lower-left... Mindfuck!
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// created from FBO have their origins in the lower-left... |
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private static Bitmap flipBitmap(Bitmap src) |
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{
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| ... | ... | |
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GLES30.glTexParameteri ( GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_MAG_FILTER, GLES30.GL_LINEAR ); |
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GLES30.glTexParameteri ( GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_S, GLES30.GL_CLAMP_TO_EDGE ); |
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GLES30.glTexParameteri ( GLES30.GL_TEXTURE_2D, GLES30.GL_TEXTURE_WRAP_T, GLES30.GL_CLAMP_TO_EDGE ); |
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GLUtils.texImage2D(GLES30.GL_TEXTURE_2D, 0, flipBitmap(mBmp), 0); |
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GLUtils.texImage2D(GLES30.GL_TEXTURE_2D, 0, mBitmapInverted ? mBmp : flipBitmap(mBmp), 0);
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GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, 0); |
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mBmp = null; |
| ... | ... | |
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} |
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else |
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{
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mBitmapInverted = false; |
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mBmp= bmp; |
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markForCreation(); |
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return true; |
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} |
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} |
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/////////////////////////////////////////////////////////////////////////////////////////////////// |
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/** |
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* Sets the underlying android.graphics.Bitmap object - this version assumes the object is already |
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* flipped upside down. |
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* <p> |
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* You can only recycle() the passed Bitmap once the OpenGL context gets created (i.e. after call |
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* to GLSurfaceView.onSurfaceCreated) because only after this point can the Library upload it to the GPU! |
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* |
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* @param bmp The (vertically flipped!) android.graphics.Bitmap object to apply effects to and display. |
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* @return true if successful, false if texture too large. |
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*/ |
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public boolean setTextureAlreadyInverted(Bitmap bmp) |
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{
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int width = bmp.getWidth(); |
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int height= bmp.getHeight(); |
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int max = DistortedLibrary.getMaxTextureSize(); |
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if( width>max || height>max ) |
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{
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android.util.Log.e("texture","error, trying to upload too large texture of size "+width+" x "+height+". Max is "+max);
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return false; |
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} |
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else |
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{
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mBitmapInverted = true; |
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mBmp= bmp; |
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markForCreation(); |
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return true; |
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