rsx: framebuffer textures do not have mipmaps!

- Force mipmap count to 1 if sampling from an RTV/DSV
- TODO: Better wcb flush detection, it should be better to re-upload the texture after it has been dwnloaded if expected mipmaps are > 1

rpcs3/Emu/RSX/Common/TextureUtils.h

@@ -5,6 +5,27 @@
 #include <vector>
 #include "Utilities/GSL.h"
 
+namespace rsx
+{
+	enum texture_upload_context
+	{
+		shader_read = 0,
+		blit_engine_src = 1,
+		blit_engine_dst = 2,
+		framebuffer_storage = 3
+	};
+
+	//Sampled image descriptor
+	struct sampled_image_descriptor_base
+	{
+		texture_upload_context upload_context = texture_upload_context::shader_read;
+		rsx::texture_dimension_extended image_type = texture_dimension_extended::texture_dimension_2d;
+		bool is_depth_texture = false;
+		f32 scale_x = 1.f;
+		f32 scale_y = 1.f;
+	};
+}
+
 struct rsx_subresource_layout
 {
 	gsl::span<const gsl::byte> data;

rpcs3/Emu/RSX/Common/texture_cache.h

@@ -17,30 +17,12 @@ namespace rsx
 		swapped_native_component_order = 2,
 	};
 
-	enum texture_upload_context
-	{
-		shader_read = 0,
-		blit_engine_src = 1,
-		blit_engine_dst = 2,
-		framebuffer_storage = 3
-	};
-
 	enum texture_sampler_status
 	{
 		status_uninitialized = 0,
 		status_ready = 1
 	};
 
-	//Sampled image descriptor
-	struct sampled_image_descriptor_base
-	{
-		texture_upload_context upload_context = texture_upload_context::shader_read;
-		rsx::texture_dimension_extended image_type = texture_dimension_extended::texture_dimension_2d;
-		bool is_depth_texture = false;
-		f32 scale_x = 1.f;
-		f32 scale_y = 1.f;
-	};
-
 	struct cached_texture_section : public rsx::buffered_section
 	{
 		u16 width;

rpcs3/Emu/RSX/GL/GLGSRender.cpp

@@ -252,7 +252,7 @@ void GLGSRender::end()
 					*sampler_state = m_gl_texture_cache.upload_texture(unused, rsx::method_registers.fragment_textures[i], m_rtts);
 
 					if (m_textures_dirty[i])
-						m_gl_sampler_states[i].apply(rsx::method_registers.fragment_textures[i]);
+						m_gl_sampler_states[i].apply(rsx::method_registers.fragment_textures[i], fs_sampler_state[i].get());
 				}
 				else
 				{

rpcs3/Emu/RSX/GL/GLTexture.cpp

@@ -133,7 +133,7 @@ namespace gl
 	}
 
 	//Apply sampler state settings
-	void sampler_state::apply(rsx::fragment_texture& tex)
+	void sampler_state::apply(rsx::fragment_texture& tex, const rsx::sampled_image_descriptor_base* sampled_image)
 	{
 		const f32 border_color = (f32)tex.border_color() / 255;
 		const f32 border_color_array[] = { border_color, border_color, border_color, border_color };
@@ -143,7 +143,8 @@ namespace gl
 		glSamplerParameteri(samplerHandle, GL_TEXTURE_WRAP_R, wrap_mode(tex.wrap_r()));
 		glSamplerParameterfv(samplerHandle, GL_TEXTURE_BORDER_COLOR, border_color_array);
 
-		if (tex.get_exact_mipmap_count() <= 1)
+		if (sampled_image->upload_context != rsx::texture_upload_context::shader_read ||
+			tex.get_exact_mipmap_count() <= 1)
 		{
 			GLint min_filter = tex_min_filter(tex.min_filter());
 

rpcs3/Emu/RSX/GL/GLTexture.h

@@ -52,6 +52,6 @@ namespace gl
 			glBindSampler(index, samplerHandle);
 		}
 
-		void apply(rsx::fragment_texture& tex);
+		void apply(rsx::fragment_texture& tex, const rsx::sampled_image_descriptor_base* sampled_image);
 	};
 }

rpcs3/Emu/RSX/VK/VKGSRender.cpp

@@ -1149,7 +1149,8 @@ void VKGSRender::end()
 
 					std::tie(min_filter, mip_mode) = vk::get_min_filter_and_mip(rsx::method_registers.fragment_textures[i].min_filter());
 
-					if (rsx::method_registers.fragment_textures[i].get_exact_mipmap_count() > 1)
+					if (sampler_state->upload_context == rsx::texture_upload_context::shader_read &&
+						rsx::method_registers.fragment_textures[i].get_exact_mipmap_count() > 1)
 					{
 						min_lod = (float)(rsx::method_registers.fragment_textures[i].min_lod() >> 8);
 						max_lod = (float)(rsx::method_registers.fragment_textures[i].max_lod() >> 8);