dealing with webgl is getting annoying

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.25)
 
-set(BLT_GRAPHICS_VERSION 0.13.6)
+set(BLT_GRAPHICS_VERSION 0.13.7)
 set(BLT_GRAPHICS_TEST_VERSION 0.0.1)
 
 project(BLT_WITH_GRAPHICS VERSION ${BLT_GRAPHICS_VERSION})

include/blt/gfx/renderer/postprocess.h

@@ -94,12 +94,19 @@ namespace blt::gfx
             pp_in_place_t(frame_buffer_t::attachment_t from, frame_buffer_t::attachment_t to): from(from), to(to)
             {}
             
+            void draw(frame_buffer_t& previous) override;
+            
+            void post_draw(frame_buffer_t& previous) override;
+            
+            void create() override;
+            
             bool requests(blt::gfx::pp_request_t request) override
             {
                 return static_cast<u64>(request) & ~(static_cast<u64>(pp_request_t::BIND_BUFFER) | static_cast<u64>(pp_request_t::CLEAR_BUFFER));
             }
         
         protected:
+            std::unique_ptr<shader_t> shader_pass;
             frame_buffer_t::attachment_t from;
             frame_buffer_t::attachment_t to;
     };
@@ -142,65 +149,26 @@ namespace blt::gfx
             matrix_state_manager& manager;
     };
     
-    class pp_blur_step_base_t : public pp_step_t
+    class pp_blur_step_inplace_t : public pp_in_place_t
-    {
-        public:
-            pp_blur_step_base_t(frame_buffer_t::attachment_t from, i32 x_blur = 2, i32 y_blur = 2):
-                    from(from), to(from), x_blur(x_blur), y_blur(y_blur)
-            {}
-            
-            pp_blur_step_base_t(frame_buffer_t::attachment_t from, frame_buffer_t::attachment_t to, i32 x_blur = 2, i32 y_blur = 2):
-                    from(from), to(to), x_blur(x_blur), y_blur(y_blur)
-            {}
-        
-        protected:
-            frame_buffer_t::attachment_t from;
-            frame_buffer_t::attachment_t to;
-            i32 x_blur;
-            i32 y_blur;
-    };
-    
-    class pp_blur_step_t : public pp_blur_step_base_t
-    {
-        public:
-            pp_blur_step_t(frame_buffer_t::attachment_t from, i32 x_blur = 2, i32 y_blur = 2): pp_blur_step_base_t(from, x_blur, y_blur)
-            {}
-            
-            pp_blur_step_t(frame_buffer_t::attachment_t from, frame_buffer_t::attachment_t to, i32 x_blur = 2, i32 y_blur = 2):
-                    pp_blur_step_base_t(from, to, x_blur, y_blur)
-            {}
-            
-            void create() override;
-            
-            void draw(frame_buffer_t& previous);
-    };
-    
-    class pp_blur_step_inplace_t : public pp_blur_step_base_t
     {
         public:
             pp_blur_step_inplace_t(matrix_state_manager& manager, frame_buffer_t::attachment_t from, i32 x_blur = 2, i32 y_blur = 2):
-                    pp_blur_step_base_t(from, x_blur, y_blur), manager(manager)
+                    pp_in_place_t(from), manager(manager), x_blur(x_blur), y_blur(y_blur)
             {}
             
             pp_blur_step_inplace_t(matrix_state_manager& manager, frame_buffer_t::attachment_t from, frame_buffer_t::attachment_t to, i32 x_blur = 2,
                                    i32 y_blur = 2):
-                    pp_blur_step_base_t(from, to, x_blur, y_blur), manager(manager)
+                    pp_in_place_t(from, to), manager(manager), x_blur(x_blur), y_blur(y_blur)
             {}
             
             void create() override;
             
             void draw(frame_buffer_t& previous);
         
-            void post_draw(frame_buffer_t& previous) override;
-            
-            bool requests(blt::gfx::pp_request_t request) override
-            {
-                return static_cast<u64>(request) & ~(static_cast<u64>(pp_request_t::BIND_BUFFER) | static_cast<u64>(pp_request_t::CLEAR_BUFFER));
-            }
-        
         private:
-            std::unique_ptr<shader_t> shader_pass;
             matrix_state_manager& manager;
+            i32 x_blur;
+            i32 y_blur;
     };
     
     class pp_expansion_step_inplace_t : public pp_in_place_t

src/blt/gfx/framebuffer.cpp

@@ -154,6 +154,8 @@ namespace blt::gfx
     {
         if (width == width_ && height == height_)
             return;
+        if (fboID == 0)
+            return;
         
         width_ = width;
         height_ = height;
@@ -208,7 +210,7 @@ namespace blt::gfx
         //glReadBuffer(GL_COLOR_ATTACHMENT0);
         //glDrawBuffer(GL_COLOR_ATTACHMENT0);
         glReadBuffer(static_cast<GLenum>(attachment_t::COLOR0));
-        GLenum buffers[] {static_cast<GLenum>(attachment_t::COLOR0)};
+        GLenum buffers[] {GL_BACK};
         glDrawBuffers(1, buffers);
         glBlitFramebuffer(0, 0, width_, height_, 0, 0, width, height, GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
     }

src/blt/gfx/renderer/postprocess.cpp

@@ -137,6 +137,41 @@ namespace blt::gfx
         glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
     }
     
+    void pp_in_place_t::create()
+    {
+        shader_pass = pp_engine_t::createShader(shader_pp_screen_frag);
+        draw_buffer = frame_buffer_t::make_render_texture(getWindowWidth(), getWindowHeight());
+    }
+    
+    void pp_in_place_t::post_draw(frame_buffer_t& previous)
+    {
+        //draw_buffer.blitTexture(previous, 0, 0, 0, 0, GL_NEAREST, from, to);
+        previous.bind();
+        GLenum buf[32];
+        auto buff_val = static_cast<GLenum>(to);
+        auto size = buff_val - GL_COLOR_ATTACHMENT0;
+        for (GLenum i = 0; i < size; i++)
+            buf[i] = GL_NONE;
+        buf[size] = buff_val;
+        glDrawBuffers(static_cast<int>(size) + 1, buf);
+        glClear(GL_COLOR_BUFFER_BIT);
+        shader_pass->bind();
+        glActiveTexture(GL_TEXTURE0);
+        draw_buffer.getTexture(frame_buffer_t::attachment_t::COLOR0).bind();
+        pp_engine_t::render_quad();
+    }
+    
+    void pp_in_place_t::draw(frame_buffer_t& previous)
+    {
+        draw_buffer.updateBuffersStorage(getWindowWidth(), getWindowHeight());
+        glActiveTexture(GL_TEXTURE0);
+        previous.getTexture(from).bind();
+        draw_buffer.bind();
+        GLenum buf[]{static_cast<GLenum>(frame_buffer_t::attachment_t::COLOR0)};
+        glDrawBuffers(1, buf);
+        glClear(GL_COLOR_BUFFER_BIT);
+    }
+    
     void pp_to_screen_step_t::create()
     {
         shader = pp_engine_t::createShader(shader_pp_screen_frag);
@@ -146,7 +181,7 @@ namespace blt::gfx
     {
         glActiveTexture(GL_TEXTURE0);
         previous.getTexture(frame_buffer_t::attachment_t::COLOR0).bind();
-        GLenum buf[]{static_cast<GLenum>(frame_buffer_t::attachment_t::COLOR0)};
+        GLenum buf[]{GL_BACK};
         glDrawBuffers(1, buf);
     }
     
@@ -204,78 +239,38 @@ namespace blt::gfx
         glActiveTexture(GL_TEXTURE1);
         previous.getTexture(frame_buffer_t::attachment_t::COLOR1).bind();
         shader->bind();
-        auto v = vec2(getWindowWidth(), getWindowHeight()) * (1.0 / blt::make_vec2(manager.getScale2D()));
+        //auto v = vec2(getWindowWidth(), getWindowHeight()) * (1.0 / blt::make_vec2(manager.getScale2D()));
         //BLT_TRACE_STREAM << v << '\n';
         //shader->setVec2("viewportSize", static_cast<f32>(v.x()), static_cast<f32>(v.y()));
         GLenum buf[]{static_cast<GLenum>(frame_buffer_t::attachment_t::COLOR0)};
         glDrawBuffers(1, buf);
     }
     
-    void pp_blur_step_t::create()
-    {
-        draw_buffer = frame_buffer_t::make_render_texture(getWindowWidth(), getWindowHeight());
-        shader = pp_engine_t::createShader(shader_gaussian_blur_frag);
-    }
-    
-    void pp_blur_step_t::draw(frame_buffer_t& previous)
-    {
-        draw_buffer.updateBuffersStorage(getWindowWidth(), getWindowHeight());
-        shader->bind();
-        shader->setVec4i("size", {getWindowWidth(), getWindowHeight(), x_blur, y_blur});
-        glActiveTexture(GL_TEXTURE0);
-        previous.getTexture(from).bind();
-        GLenum buf[]{static_cast<GLenum>(to)};
-        glDrawBuffers(1, buf);
-    }
-    
     void pp_blur_step_inplace_t::create()
     {
-        draw_buffer = frame_buffer_t::make_render_texture(getWindowWidth(), getWindowHeight());
+        pp_in_place_t::create();
         shader = pp_engine_t::createShader(shader_gaussian_blur_frag);
-        shader_pass = pp_engine_t::createShader(shader_pp_screen_frag);
     }
     
     void pp_blur_step_inplace_t::draw(frame_buffer_t& previous)
     {
-        draw_buffer.updateBuffersStorage(getWindowWidth(), getWindowHeight());
+        pp_in_place_t::draw(previous);
         shader->bind();
         //auto v = vec2(getWindowWidth(), getWindowHeight()) * (1.0 / blt::make_vec2(manager.getScale2D()));
         auto v = vec2(getWindowWidth(), getWindowHeight());
         shader->setVec4i("size", {static_cast<i32>(v.x()), static_cast<i32>(v.y()), x_blur, y_blur});
-        glActiveTexture(GL_TEXTURE0);
-        previous.getTexture(from).bind();
-        //GLenum buf[]{static_cast<GLenum>(to)};
-        GLenum buf[]{static_cast<GLenum>(frame_buffer_t::attachment_t::COLOR0)};
-        glDrawBuffers(1, buf);
-        draw_buffer.bind();
-        glClear(GL_COLOR_BUFFER_BIT);
-    }
-    
-    void pp_blur_step_inplace_t::post_draw(frame_buffer_t& previous)
-    {
-        //draw_buffer.blitTexture(previous, 0, 0, 0, 0, GL_NEAREST, from, to);
-        previous.bind();
-        GLenum buf[]{static_cast<GLenum>(to)};
-        glDrawBuffers(1, buf);
-        glClear(GL_COLOR_BUFFER_BIT);
-        shader_pass->bind();
-        glActiveTexture(GL_TEXTURE0);
-        draw_buffer.getTexture(frame_buffer_t::attachment_t::COLOR0).bind();
-        pp_engine_t::render_quad();
     }
     
     void pp_expansion_step_inplace_t::create()
     {
+        pp_in_place_t::create();
         shader = pp_engine_t::createShader(shader_multiplier_frag);
     }
     
     void pp_expansion_step_inplace_t::draw(frame_buffer_t& previous)
     {
+        pp_in_place_t::draw(previous);
         shader->bind();
         shader->setVec4("multiplier", multiplier);
-        glActiveTexture(GL_TEXTURE0);
-        previous.getTexture(from).bind();
-        GLenum buf[]{static_cast<u32>(to)};
-        glDrawBuffers(1, buf);
     }
 }