Support multiple PipelineStates in Renderer

[libs/gl.git] / source / render / renderer.cpp

diff --git a/source/render/renderer.cpp b/source/render/renderer.cpp
index 0c5bf77454ed25c32151f2a44ed189723234a192..336b631aaf91c467dbca5577abd81f2b79ebaebe 100644 (file)
--- a/source/render/renderer.cpp
+++ b/source/render/renderer.cpp
@@ -71,9 +71,14 @@ void Renderer::pop_state()
        if(state_stack.size()==1)
                throw stack_underflow("Renderer::pop_state");
 
+       uintptr_t old_pipeline = current_state->pipeline_key;
+
        state_stack.pop_back();
        current_state = &state_stack.back();
        changed |= MATRIX;
+
+       if(current_state->pipeline_key!=old_pipeline)
+               changed |= PIPELINE_KEY;
 }
 
 Renderer::State &Renderer::get_state() const
@@ -85,6 +90,16 @@ Renderer::State &Renderer::get_state() const
        return *current_state;
 }
 
+void Renderer::set_pipeline_key(uintptr_t key)
+{
+       State &state = get_state();
+       if(key!=state.pipeline_key)
+       {
+               state.pipeline_key = key;
+               changed |= PIPELINE_KEY;
+       }
+}
+
 void Renderer::set_camera(const Camera &c)
 {
        get_state().camera = &c;
@@ -242,7 +257,7 @@ void Renderer::set_object_lod_bias(unsigned b)
 void Renderer::clear(const ClearValue *values)
 {
        apply_framebuffer();
-       commands.use_pipeline(&pipeline_state);
+       commands.use_pipeline(&get_pipeline_state());
        commands.clear(values);
 }
 
@@ -250,8 +265,9 @@ void Renderer::draw(const Batch &batch)
 {
        apply_state();
        batch.refresh(frame_index);
-       pipeline_state.set_primitive_type(batch.get_type());
-       commands.use_pipeline(&pipeline_state);
+       PipelineState &ps = get_pipeline_state();
+       ps.set_primitive_type(batch.get_type());
+       commands.use_pipeline(&ps);
        commands.draw(batch);
 }
 
@@ -259,8 +275,9 @@ void Renderer::draw_instanced(const Batch &batch, unsigned count)
 {
        apply_state();
        batch.refresh(frame_index);
-       pipeline_state.set_primitive_type(batch.get_type());
-       commands.use_pipeline(&pipeline_state);
+       PipelineState &ps = get_pipeline_state();
+       ps.set_primitive_type(batch.get_type());
+       commands.use_pipeline(&ps);
        commands.draw_instanced(batch, count);
 }
 
@@ -276,8 +293,8 @@ void Renderer::resolve_multisample(Framebuffer &target)
        if(target.get_width()!=width || target.get_height()!=height)
                throw incompatible_data("Renderer::resolve_multisample");
 
-       pipeline_state.set_framebuffer(state.framebuffer);
-       commands.use_pipeline(&pipeline_state);
+       apply_framebuffer();
+       commands.use_pipeline(&get_pipeline_state());
        commands.resolve_multisample(target);
 }
 
@@ -291,14 +308,27 @@ void Renderer::end_query(const QueryPool &pool, unsigned index)
        commands.end_query(pool, index);
 }
 
+PipelineState &Renderer::get_pipeline_state()
+{
+       if(changed&PIPELINE_KEY)
+       {
+               RendererBackend::set_pipeline_key(current_state->pipeline_key);
+               changed &= ~PIPELINE_KEY;
+       }
+
+       return RendererBackend::get_pipeline_state();
+}
+
 void Renderer::apply_framebuffer()
 {
        const State &state = get_state();
 
-       pipeline_state.set_framebuffer(state.framebuffer);
+       PipelineState &ps = get_pipeline_state();
+
+       ps.set_framebuffer(state.framebuffer);
        static const Rect default_rect = Rect::max();
-       pipeline_state.set_viewport(state.viewport ? *state.viewport : default_rect);
-       pipeline_state.set_scissor(state.scissor ? *state.scissor : default_rect);
+       ps.set_viewport(state.viewport ? *state.viewport : default_rect);
+       ps.set_scissor(state.scissor ? *state.scissor : default_rect);
 }
 
 void Renderer::apply_state()
@@ -310,8 +340,12 @@ void Renderer::apply_state()
 
        apply_framebuffer();
 
-       bool shprog_changed = (state.shprog!=pipeline_state.get_shader_program());
-       pipeline_state.set_shader_program(state.shprog);
+       PipelineState &ps = get_pipeline_state();
+       bool pipeline_changed = (&ps!=last_pipeline);
+       last_pipeline = &ps;
+
+       bool shprog_changed = (state.shprog!=ps.get_shader_program());
+       ps.set_shader_program(state.shprog);
 
        if(changed&MATRIX)
        {
@@ -327,13 +361,13 @@ void Renderer::apply_state()
                shdata_changed = (i->shdata->get_generation()!=i->generation);
        bool extra_shdata = (shdata_stack.size()>state.shdata_count);
 
-       if(shdata_changed || shprog_changed || extra_shdata)
+       if(shdata_changed || shprog_changed || pipeline_changed || extra_shdata)
        {
                if(extra_shdata)
                        shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
                for(const BoundProgramData &d: shdata_stack)
                {
-                       d.shdata->apply(*state.shprog, pipeline_state, frame_index);
+                       d.shdata->apply(*state.shprog, ps, frame_index);
                        d.generation = d.shdata->get_generation();
                }
                changed &= ~SHADER_DATA;
@@ -346,10 +380,10 @@ void Renderer::apply_state()
                if(const VertexArray *array = state.vertex_setup->get_instance_array())
                        array->refresh(frame_index);
        }
-       pipeline_state.set_vertex_setup(state.vertex_setup);
+       ps.set_vertex_setup(state.vertex_setup);
 
-       pipeline_state.set_front_face(state.front_face);
-       pipeline_state.set_face_cull(state.face_cull);
+       ps.set_front_face(state.front_face);
+       ps.set_face_cull(state.face_cull);
 
        if(state.texture_count<texture_stack.size())
                flush_textures();
@@ -360,15 +394,15 @@ void Renderer::apply_state()
                        if(t.binding<0 || shprog_changed)
                                t.binding = state.shprog->get_uniform_binding(t.tag);
                        if(t.binding>=0)
-                               pipeline_state.set_texture(t.binding, t.texture, t.level, t.sampler);
+                               ps.set_texture(t.binding, t.texture, t.level, t.sampler);
                }
 
        static const DepthTest default_depth_test;
-       pipeline_state.set_depth_test(state.depth_test ? *state.depth_test : default_depth_test);
+       ps.set_depth_test(state.depth_test ? *state.depth_test : default_depth_test);
        static const StencilTest default_stencil_test;
-       pipeline_state.set_stencil_test(state.stencil_test ? *state.stencil_test : default_stencil_test);
+       ps.set_stencil_test(state.stencil_test ? *state.stencil_test : default_stencil_test);
        static const Blend default_blend;
-       pipeline_state.set_blend(state.blend ? *state.blend : default_blend);
+       ps.set_blend(state.blend ? *state.blend : default_blend);
 }