Handle clipping in Pipeline and Renderer

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

diff --git a/source/renderer.cpp b/source/renderer.cpp
index c558757f885654e0646f6392d9866b4bf52b205e..6a4c488f0b0ed81dcf1a9e35ce6f407f2651cf4f 100644 (file)
--- a/source/renderer.cpp
+++ b/source/renderer.cpp
@@ -1,6 +1,7 @@
 #include "batch.h"
 #include "buffer.h"
 #include "camera.h"
+#include "clipping.h"
 #include "error.h"
 #include "lighting.h"
 #include "material.h"
@@ -102,6 +103,15 @@ void Renderer::set_lighting(const Lighting *l)
        changed |= LIGHTING;
 }
 
+void Renderer::set_clipping(const Clipping *c)
+{
+       state->clipping = c;
+       state->clipping_matrix = mtx_stack.top();
+       if(c)
+               c->update_shader_data(standard_shdata, mtx_stack.top());
+       changed |= CLIPPING;
+}
+
 void Renderer::set_shader_program(const Program *p, const ProgramData *d)
 {
        state->shprog = p;
@@ -144,6 +154,7 @@ void Renderer::pop_state()
                throw stack_underflow("Renderer::pop_state");
 
        const Lighting *old_lighting = state->lighting;
+       const Clipping *old_clipping = state->clipping;
        state_stack.pop_back();
        state = &state_stack.back();
        if(shdata_stack.size()>state->shdata_count)
@@ -160,6 +171,12 @@ void Renderer::pop_state()
                        state->lighting->update_shader_data(standard_shdata, state->lighting_matrix);
                changed |= LIGHTING;
        }
+       if(state->clipping!=old_clipping)
+       {
+               if(state->clipping)
+                       state->clipping->update_shader_data(standard_shdata, state->clipping_matrix);
+               changed |= CLIPPING;
+       }
 }
 
 void Renderer::escape()
@@ -256,6 +273,23 @@ void Renderer::apply_state()
                }
        }
 
+       if(changed&CLIPPING)
+       {
+               if(state->clipping)
+               {
+                       if(legacy_bindings)
+                       {
+                               MatrixStack::modelview() = state->clipping_matrix;
+                               state->clipping->bind(true);
+                               changed = (changed&~CLIPPING)|LEGACY_MATRIX;
+                       }
+                       else
+                               state->clipping->bind(false);
+               }
+               else
+                       Clipping::unbind();
+       }
+
        if(state->shprog)
        {
                bool shprog_changed = (state->shprog!=Program::current());
@@ -357,6 +391,7 @@ Renderer::State::State():
        lowest_effect_texunit(TexUnit::get_n_units()),
        material(0),
        lighting(0),
+       clipping(0),
        shprog(0),
        shdata_count(0),
        mesh(0),