MaterialSystem: use SetUniform_DepthMapBindless()

Author: VReaperV

src/engine/renderer/Material.cpp

@@ -1639,8 +1639,10 @@ void MaterialSystem::DepthReduction() {
 	uint32_t globalWorkgroupX = ( width + 7 ) / 8;
 	uint32_t globalWorkgroupY = ( height + 7 ) / 8;
 
-	// FIXME: u_DepthMap object on the shader is not actually used
-	GL_Bind( tr.currentDepthImage );
+	gl_depthReductionShader->SetUniform_DepthMapBindless(
+		GL_BindToTMU( 0, tr.currentDepthImage )
+	);
+
 	glBindImageTexture( 2, depthImage->texnum, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32F );
 
 	gl_depthReductionShader->SetUniform_InitialDepthLevel( true );