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[英]Android: track invisible for switchcompat when on white background
[英]Background invisible when masking in an FBO
我试图在LibGDX中将前景纹理蒙版到背景纹理上。 在屏幕上绘制时效果很好,但是在FBO中绘制时,背景消失了。
这是蒙版的绘制方式:
batch.draw(background, x, y);
batch.flush();
Gdx.gl.glColorMask(false, false, false, true);
batch.setBlendFunction(GL20.GL_ONE, GL20.GL_ZERO);
batch.draw(mask, x, y);
batch.flush();
Gdx.gl.glColorMask(true, true, true, true);
batch.setBlendFunction(GL20.GL_DST_ALPHA, GL20.GL_ONE_MINUS_DST_ALPHA);
batch.draw(foreground, x, y);
batch.flush();
batch.setBlendFunction(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA);
这是我绘制常规图和FBO图的方式:
定期
batch.begin();
batch.enableBlending();
batch.setProjectionMatrix(camera.combined);
drawFull(32, 600 - (64 * 4) - 32);
batch.end();
联邦调查局
// draw the FB mask
fb.begin();
batch.begin();
batch.setProjectionMatrix(fbcamera.combined);
batch.enableBlending();
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
drawFull(0, 0);
batch.end();
fb.end();
// draw the FB mask to the main batch
batch.begin();
batch.enableBlending();
batch.setProjectionMatrix(camera.combined);
batch.draw(fb.getColorBufferTexture(), 32, 600 - (64 * 7) - 32);
batch.end();
我设法通过在将FBO绘制到屏幕时禁用混合来解决此问题。 这样做的缺点是我们不能以不透明的方式绘制FBO。
// draw the FB mask to the main batch
batch.begin();
batch.disableBlending();
batch.setProjectionMatrix(camera.combined);
batch.draw(fb.getColorBufferTexture(), 32, 600 - (64 * 7) - 32);
batch.end();
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