Updates the Simple Render Scene with better gui features

Adds flip vertical method to the Texture class

src/renderer/renderer2D.cpp

@@ -262,6 +262,21 @@ namespace lunarium
 
             glDrawElements(GL_TRIANGLES, mQuadData.NumQuads * 6,  GL_UNSIGNED_INT, nullptr);
 
+            mQuadData.WireFrameShader->Use();
+            uprojview.Location = -1;
+            mQuadData.WireFrameShader->SetUniform(uprojview, (void*)glm::value_ptr(mpCamera->GetViewProjection())).LogIfFailed(LogCategory::GRAPHICS);
+
+            // Uniform ucolor;
+            // ucolor.Type = UniformType::F4;
+            // ucolor.Location = -1;
+            // ucolor.Name = "in_color";
+            // mQuadData.WireFrameShader->SetUniform(ucolor, (void*)glm::value_ptr(glm::vec4(0.2f, 0.1f, 1.0f, 1.0f))).LogIfFailed(LogCategory::GRAPHICS);
+            // glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+            // glLineWidth(5.0f);
+            // glDrawElements(GL_TRIANGLES, mQuadData.NumQuads * 6,  GL_UNSIGNED_INT, nullptr);
+            // glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
+            
+
             mFrameStats.DrawCalls++;
         }
 
@@ -333,6 +348,15 @@ namespace lunarium
             return OpRes::Fail("Failed to create the quad shader");
         }
 
+        // Wireframe shader
+        std::string wire_vert_source = File::ReadTextFile("quad_wireframe.vert");
+        std::string wire_frag_source = File::ReadTextFile("quad_wireframe.frag");
+        mQuadData.WireFrameShader = new Shader(wire_vert_source.c_str(), nullptr, wire_frag_source.c_str());
+        if (!mQuadData.WireFrameShader->IsValid())
+        {
+            return OpRes::Fail("Failed to create the quad wireframe shader");
+        }
+
         // INIT WHITE TEXTURE
         u8 data[4] = {255, 255, 255, 255};
         mQuadData.WhiteTexture = Texture::Create(data, 1, 1);

src/renderer/renderer2D.h

@@ -144,6 +144,7 @@ namespace lunarium
             BufferLayout BufferLayout;
             VertexBuffer* VertexBuffer;
             Shader* QuadShader;
+            Shader* WireFrameShader;
         } mQuadData;
 
         /////////////////////////////////////////////////////////////////////

src/renderer/shader.cpp

@@ -159,6 +159,12 @@ namespace lunarium
             default: return OpRes::Fail("Can not set uniform value - Unknown type");
         }
 
+        int error = glGetError();
+        if (error > 0)
+        {
+            Logger::Error(LogCategory::GRAPHICS, "Error setting uniform - Name: %s error code: %d", uniform.Name.c_str(), error);
+        }
+
         return OpRes::OK();
     }
 

src/renderer/shaders/quad_wireframe.frag

@@ -0,0 +1,15 @@
+#version 450 core
+layout (location = 0) in vec2 f_tex_coords;
+layout (location = 1) in vec4 f_vert_color;
+layout (location = 2) flat in int f_tex_index;
+layout (location = 3) flat in int f_tex_is_grey;
+
+uniform vec4 in_color;
+
+out vec4 color;
+layout (binding = 0) uniform sampler2D textures[32];
+
+void main()
+{    
+    color = in_color;
+}

src/renderer/shaders/quad_wireframe.vert

@@ -0,0 +1,59 @@
+
+#version 450 core
+layout(location = 0) in vec3 pos;
+layout(location = 1) in vec2 tex_coords;
+layout(location = 2) in vec4 color;
+layout(location = 3) in float tex_slot;
+layout(location = 4) in vec3 translation;
+layout(location = 5) in float angle;
+layout(location = 6) in vec3 scale;
+layout(location = 7) in vec3 tex_is_grey_scale;
+
+layout (location = 0) out vec2 f_tex_coords;
+layout (location = 1) out vec4 f_vert_color;
+layout (location = 2) flat out int f_tex_index;
+layout (location = 3) flat out int f_tex_is_grey;
+
+uniform mat4 projview;
+
+void main()
+{
+    f_tex_index = int(tex_slot);
+    f_tex_coords = tex_coords;
+    f_vert_color = color;
+    f_tex_is_grey = int(tex_is_grey_scale);
+    // mat4 ModelTrans = mat4( 
+    // vec4( scale.x * cos(angle), scale.x * -sin(angle), 0.0,     0.0), 
+    // vec4( scale.y * sin(angle), scale.y *  cos(angle), 0.0,     0.0),
+    // vec4( 0.0,                    0.0,                     scale.z, 0.0),
+    // vec4( translation.xyz,                                          1.0)
+    // );
+
+    mat4 Translation = mat4( 
+        vec4( 1.0, 0.0, 0.0, 0.0), 
+        vec4( 0.0, 1.0, 0.0, 0.0),
+        vec4( 0.0, 0.0, 1.0, 0.0),
+        vec4( translation.xyz, 1.0));
+
+    mat4 Rotation = mat4( 
+        vec4( cos(angle), -sin(angle), 0.0, 0.0), 
+        vec4( sin(angle), cos(angle), 0.0, 0.0),
+        vec4( 0.0, 0.0, 1.0, 0.0),
+        vec4( 0.0, 0.0, 0.0, 1.0));
+
+    mat4 Scale = mat4(
+        vec4(scale.x, 0.0, 0.0, 0.0),
+        vec4(0.0, scale.y, 0.0, 0.0),
+        vec4(0.0, 0.0,scale.z, 0.0),
+        vec4(0.0, 0.0, 0.0, 1.0));
+
+   // mat4 model = Translation * RotationScale;
+    //gl_Position =  Translation * vec4(pos, 1.0);
+
+    mat4 model = mat4( vec4(1.0, 0.0, 0.0, 0.0), vec4(0.0, 1.0, 0.0, 0.0), vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0));
+    model = model * Translation;
+    model = model * Rotation;
+    model = model * Scale;
+
+    gl_Position = projview * model * vec4(pos, 1.0);
+}

src/renderer/texture.cpp

@@ -48,7 +48,7 @@ namespace lunarium
         int error = glGetError();
         if (error > 0)
         {
-            Logger::Error(LogCategory::GRAPHICS, "Error setting texture data");
+            Logger::Error(LogCategory::GRAPHICS, "Error setting texture data: %d", error);
         }
 
         GLint param = clamp ? GL_CLAMP_TO_EDGE : GL_REPEAT;
@@ -82,6 +82,36 @@ namespace lunarium
     {
         glBindTexture(GL_TEXTURE_2D, 0); 
     }
+
+    
+    void Texture::FlipVertically()
+    {
+        i32 components = NumComponents();
+
+        u8* pixel_buffer = GetPixels();
+        u8* flipped_buffer = new u8[mWidth * mHeight * components];
+
+        for (int i = 0; i < mWidth; ++i)
+        {
+            for (int j = 0; j < mHeight; ++j)
+            {
+                for (int k = 0; k < components; ++k)
+                {
+                    flipped_buffer[(i + j * mWidth) * components + k] = pixel_buffer[(i + (mHeight - 1 - j) * mWidth) * components + k];
+                }
+            }
+        }
+
+        u32 formats[3] = { GL_RED, GL_RGB, GL_RGBA };
+        Bind();
+        glTexImage2D(GL_TEXTURE_2D, 0, formats[(int)mFormat], mWidth, mHeight, 0, formats[(int)mFormat], GL_UNSIGNED_BYTE, flipped_buffer);
+        Unbind();
+        int error = glGetError();
+        if (error > 0)
+        {
+            Logger::Error(LogCategory::GRAPHICS, "Error setting texture data: %d", error);
+        }
+    }
     
 
     u32 Texture::GetGLID() const
@@ -123,5 +153,11 @@ namespace lunarium
         return buffer;
     }
 
+    i32 Texture::NumComponents() const
+    {
+        u32 components_size[3] = { 1, 3, 4 };
+        return components_size[(int)mFormat];
+
+    }
 
 }

src/renderer/texture.h

@@ -30,6 +30,8 @@ namespace lunarium
         void Bind(u32 slot = 0) const;
         void Unbind() const;
 
+        void FlipVertically();
+
         u32 GetGLID() const;
         u64 GetGLID64() const;
         TextureFormat GetFormat() const;
@@ -37,6 +39,7 @@ namespace lunarium
         u32 GetHeight() const;
 
         u8* GetPixels() const;
+        i32 NumComponents() const;
 
     private:
         TextureFormat mFormat;

src/run_modes/testbed/scenes/simple_render_scene.cpp

@@ -53,7 +53,7 @@ namespace lunarium
 
         // Load test image
         int w, h, n;
-        stbi_set_flip_vertically_on_load(1);
+        stbi_set_flip_vertically_on_load(0);
         unsigned char* buffer = stbi_load("LinkToThePast1_sized.png", &w, &h, &n, 0);
 
         TextureFormat format = TextureFormat::RGBA;
@@ -61,7 +61,7 @@ namespace lunarium
         {
             format = TextureFormat::RGB;
         }
-        mpTestImageLoad = Texture::Create(buffer, w, h, format);
+        mpTestImageLoad = Texture::Create(buffer, w, h, format, true);
         mSrcWidth = w;
         mSrcHeight = h;
 
@@ -254,6 +254,11 @@ namespace lunarium
 
         }
 
+        if (Core::Input().IsKeyPressed(KeyCode::F))
+        {
+            flip_image = !flip_image;
+        }
+
         mImageSize.Width = Math::ClampI(mImageSize.Width, 320, 1280);
         mImageSize.Height = Math::ClampI(mImageSize.Height, 180, 720);
 
@@ -270,6 +275,7 @@ namespace lunarium
                                 Color(0.0f, 1.0f, 1.0f, 1.0f), 0.5f);
         g.EndDraw();
         mpRenderedImage = mFrameBufferOne->GetTexture();
+        if (flip_image) mpRenderedImage->FlipVertically();
         mFrameBufferOne->Unbind();
 
         box_angle += 0.01f;
@@ -314,9 +320,9 @@ namespace lunarium
         //g->DrawImage(*mpTestImageLoad, glm::vec2(0.0f, 0.0f), Color::White());
         //Rectangle src = Rectangle::MakeFromTopLeft(0.0f, 0.0f, (float)mpTestImageLoad->GetWidth(), (float)mpTestImageLoad->GetHeight());
         //Rectangle src = Rectangle::MakeFromTopLeft(0.0f, 0.0f, mSrcWidth, mSrcHeight);
-        // Rectangle src = Rectangle::MakeFromTopLeft(0.0f, 0.0f, 16, 16);
-        // Rectangle dest = Rectangle::MakeFromTopLeft(100.0f, 100.0f, 512.0f, 512.0f);
-        //g.DrawImage(*mpTestImageLoad, src, dest, Color(1.0f, 1.0f, 1.0f, 0.9f));
+        Rectangle src = Rectangle::MakeFromTopLeft(0.0f, 0.0f, 16, 16);
+        Rectangle dest = Rectangle::MakeFromTopLeft(900.0f, 350.0f, 256.0f, 256.0f);
+        g.DrawQuad(dest, Color::White(), mpTestImageLoad, 0.0f, src);
         
         // g->DrawImage(*mpTestImageLoad, src,
         //             dest, Color(1.0f, 1.0f, 1.0f, 0.8f));
@@ -348,14 +354,14 @@ namespace lunarium
     
     void SimpleRenderScene::DrawStatsGUI()
     {
-        std::string mode_names[3] = { "Basic", "Stress", "String" };
+        const char* mode_names[3] = { "Basic", "Stress", "String" };
         ImGui::SetNextWindowPos(ImVec2(0, 0), ImGuiCond_FirstUseEver);
         ImGui::SetNextWindowSize(ImVec2(400, 800));
         ImGui::Begin("RENDER INFO"); 
         ImGui::BeginChild("Scene Info", ImVec2(ImGui::GetWindowSize().x - 15, ImGui::GetFrameHeightWithSpacing() * 3.5f), true);
         ImGui::Text("Scene Info");
         ImGui::Separator();
-        ImGui::Text("Scene Mode: %s", mode_names[mTestMode].c_str());
+        ImGui::Combo("Scene Mode", (int*)&mTestMode, mode_names, 3);
         ImGui::EndChild();
         ImGui::BeginChild("Per Frame", ImVec2(ImGui::GetWindowSize().x - 15, ImGui::GetFrameHeightWithSpacing() * 3.5f), true);
         ImGui::Text("Per Frame");
@@ -373,13 +379,27 @@ namespace lunarium
         ImGui::BeginChild("Settings", ImVec2(ImGui::GetWindowSize().x - 15, ImGui::GetFrameHeightWithSpacing() * 4.5f), true);
         ImGui::Text("Settings");
         ImGui::Separator();
-        ImGui::InputInt("Number of Quads to draw", &mNumQuadsToRender);
-        ImGui::Checkbox("Draw Textures", &mUseTextures);
-        float vals[4] = {mSubTex.left(), mSubTex.top(), mSubTex.HalfWidth * 2, mSubTex.HalfHeight * 2 };
-        if (ImGui::DragFloat4("Sub Texture Rect", vals))
+        if (mTestMode == TestMode::Stress)
         {
-            mSubTex = Rectangle::MakeFromTopLeft(vals[0], vals[1], vals[2], vals[3]);
+            ImGui::InputInt("Number of Quads to draw", &mNumQuadsToRender);
+            ImGui::Checkbox("Draw Textures", &mUseTextures);
         }
+
+        else if (mTestMode == TestMode::Basic)
+        {
+            float vals[4] = {mSubTex.left(), mSubTex.top(), mSubTex.HalfWidth * 2, mSubTex.HalfHeight * 2 };
+            if (ImGui::DragFloat4("Sub Texture Rect", vals))
+            {
+                mSubTex = Rectangle::MakeFromTopLeft(vals[0], vals[1], vals[2], vals[3]);
+            }
+
+            if (ImGui::Button("Reset"))
+            {
+                mSubTex = Rectangle::MakeFromTopLeft(0.0f, 0.0f, 256.0f, 256.0f);
+            }
+        }
+        
+       
         ImGui::EndChild();
         ImGui::End();
 

src/run_modes/testbed/scenes/simple_render_scene.h

@@ -40,6 +40,7 @@ namespace lunarium
         
         int mTextBoxWidth;
         Sizei mImageSize;
+        bool flip_image = true;
         Texture* mpRenderedImage;
         Texture* mpTestImageLoad;
         Texture* mpTestImageLoad2;