Simple question on ScopedTextureBind with drawSolidRect

Using Cinder
1

Hello all,
I’m sorry for this obviously remedial question, but I’ve been having problems binding a texture to use with drawSolidRect(). I know I"m missing something completely obvious, but after hours of looking, I feel like I’m getting further from where i need to be. Here is the pertinent code:

void GLBlurTestApp::setup()
{
	auto fmt = gl::Fbo::Format().samples(4).attachment(GL_COLOR_ATTACHMENT0, 
		gl::Texture2d::create(FBOW,FBOH,gl::Texture2d::Format().internalFormat(GL_RGB8)));
	mFBO = gl::Fbo::create(FBOW, FBOH, fmt);
	blurFBO = gl::Fbo::create(FBOW, FBOH, fmt);
	try{
		
		mBlur = gl::GlslProg::create(gl::GlslProg::Format().vertex(loadAsset("../data/blur_vert.glsl"))
			.fragment(loadAsset("../data/blur_frag.glsl")));
	}
	catch (const std::exception& exc)
	{
		console() << "SHADER FAILED 'cause: " << exc.what();
	}
}


void GLBlurTestApp::draw()
{
	gl::clear( Color( 0, 0, 0.25 ) ); 
	gl::draw(mFBO->getColorTexture(), Rectf(0, 0, getWindowWidth() / 2, getWindowHeight() / 2));

	{
		gl::Texture2dRef texref = mFBO->getTexture2d(GL_COLOR_ATTACHMENT0);
		gl::ScopedTextureBind tex0(texref,0);		
		//this just draws white.
		gl::drawSolidRect(Rectf(getWindowWidth() / 2, getWindowHeight() / 2, getWindowWidth(), getWindowHeight()),vec2(0,1),vec2(1,0));
		//this draws the mFBO texture
		gl::draw(texref, Rectf(getWindowWidth() / 2, 0, getWindowWidth(), getWindowHeight() / 2));
	}
	//CI_CHECK_GL();
}

Which yields an image wherein the gl::drawSolidRect() does not render the texture, rather it simply throws up a white rect:

cinder_texture.gif643×511 6.41 KB

So: given that the texture information in mFBO clearly exists, what simple stupid thing am I overlooking?

thank you.

2

Hey - I believe you need to have a shader bound before drawing the rect, like:

gl::ScopedGlslProg scpGlslProg(gl::getStockShader(gl::ShaderDef().texture()));
gl::ScopedTextureBind scpTextureBind(mFbo->getColorTexture(), 0);
gl::drawSolidRect(getWindowBounds());
1 Like
3

thank you very much! that was it.