Add a new transform API to Renderer.

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

diff --git a/source/renderer.h b/source/renderer.h
index f736447e12fce15c7bf9555cd9be7333cd01b2ae..18d3a41a7bf49dcf19737ce53a01f5a08cfc93e3 100644 (file)
--- a/source/renderer.h
+++ b/source/renderer.h
@@ -65,6 +65,7 @@ private:
        {
                const Texture *texture;
                const Texturing *texturing;
+               unsigned lowest_effect_texunit;
                const Material *material;
                const Lighting *lighting;
                Matrix lighting_matrix;
@@ -88,28 +89,52 @@ private:
                virtual void update();
        };
 
+       enum ChangeMask
+       {
+               LEGACY_MATRIX = 1,
+               MODERN_MATRIX = 2,
+               MATRIX = LEGACY_MATRIX|MODERN_MATRIX,
+               LIGHTING = 4,
+               SHADER_DATA = 8
+       };
+
        MtxStack mtx_stack;
-       bool mtx_changed;
+       unsigned char changed;
+       bool matrices_loaded;
+       unsigned shdata_applied;
        const Camera *camera;
        std::vector<State> state_stack;
        State *state;
-       bool lighting_changed;
        ProgramData standard_shdata;
        std::vector<const ProgramData *> shdata_stack;
-       bool shdata_changed;
-       const Buffer *element_buffer;
        std::set<const Renderable *> excluded;
 
 public:
        Renderer(const Camera *);
        ~Renderer();
 
+       /** Resets all internal state and restarts rendering.  There must be no
+       unpopped state in the stack.  It is permissible to call begin() multiple
+       times without an intervening end(). */
+       void begin(const Camera *);
+
+       /** Deprecated as unsafe.  Use set_matrix() or transform() instead. */
        MatrixStack &matrix_stack() { return mtx_stack; }
 
+       /** Replaces the Renderer's modelview matrix. */
+       void set_matrix(const Matrix &);
+
+       /** Applies a transform to the Renderer's modelview matrix. */
+       void transform(const Matrix &);
+
+       /** Returns the current modelview matrix. */
+       const Matrix &get_matrix() const { return mtx_stack.top(); }
+
        const Camera *get_camera() const { return camera; }
 
        void set_texture(const Texture *);
        void set_texturing(const Texturing *);
+       unsigned allocate_effect_texunit();
        void set_material(const Material *);
 
        void set_lighting(const Lighting *);
@@ -124,7 +149,6 @@ public:
        void add_shader_data(const ProgramData &data);
 
        void set_mesh(const Mesh *);
-       void set_element_buffer(const Buffer *);
        void set_winding_test(const WindingTest *);
        void set_reverse_winding(bool);
 
@@ -137,9 +161,14 @@ public:
 
        /** Prepares for temporarily bypassing the Renderer by synchronizing the
        current state with GL.  No additional call is necessary to resume using the
-       Renderer. */
+       Renderer.  DEPRECATED. */
        void escape();
 
+       /** Unbinds all objects and resets related state.  There must be no unpopped
+       state in the stack.  Rendering with the same camera can be restarted without
+       an explicit begin() call. */
+       void end();
+
        void exclude(const Renderable &);
        void include(const Renderable &);
 
@@ -148,6 +177,7 @@ public:
 
 private:
        void apply_state();
+       void reset_state();
 };
 
 } // namespace GL