Drawing primitives

[underdoeg]

Is there already a 2d drawing primitive to quickly draw in image (aka textured rect)?

[tgfrerer]

Not yet - but for an example of how to render a textured quad, the lut grading example code might help:

island/apps/examples/lut_grading_example/lut_grading_example_app/lut_grading_example_app.cpp

Lines 158 to 186 in 2b718dc

	auto renderPassMain =
	le::RenderPass( "main" )
	.addColorAttachment( LE_SWAPCHAIN_IMAGE_HANDLE )
	.sampleTexture( lut_image_texture, lut_tex_info ) // Declare texture name: color lut image
	.sampleTexture( src_image_texture, src_imag_tex_info ) // Declare texture name: src image
	.setExecuteCallback( self, []( le_command_buffer_encoder_o *encoder_, void *user_data ) {
	auto app = static_cast<lut_grading_example_app_o *>( user_data );
	le::Encoder encoder{ encoder_ };
	// Draw main scene
	static auto shaderVert = app->renderer.createShaderModule( "./local_resources/shaders/fullscreen.vert", le::ShaderStage::eVertex );
	static auto shaderFrag = app->renderer.createShaderModule( "./local_resources/shaders/fullscreen.frag", le::ShaderStage::eFragment );
	static auto pipelineLutGradingExample =
	LeGraphicsPipelineBuilder( encoder.getPipelineManager() )
	.addShaderStage( shaderVert )
	.addShaderStage( shaderFrag )
	.build();
	static auto src_image_texture = le::Renderer::produceTextureHandle( "src_image" );
	static auto lut_image_texture = le::Renderer::produceTextureHandle( "color_lut_image" );
	encoder
	.bindGraphicsPipeline( pipelineLutGradingExample )
	.setArgumentTexture( LE_ARGUMENT_NAME( "src_tex_unit_0" ), src_image_texture )
	.setArgumentTexture( LE_ARGUMENT_NAME( "src_tex_unit_1" ), lut_image_texture )
	.setArgumentData( LE_ARGUMENT_NAME( "Params" ), &app->mouse_x_normalised, sizeof( float ) )
	.draw( 4 );