Fixed background scaling (should improve #81)

Added some more debug information for renderdoc

Signed-off-by: Alexis Maiquez <almamu@almamu.com>

src/WallpaperEngine/Render/CContext.cpp

@@ -126,7 +126,7 @@ void CContext::initializeViewports ()
                     crtc->x, crtc->y, crtc->width, crtc->height
                 };
 
-                this->m_viewports.push_back (viewport);
+                this->m_viewports.push_back ({viewport, *cur});
 
                 XRRFreeCrtcInfo (crtc);
             }
@@ -141,7 +141,7 @@ void CContext::initializeViewports ()
     this->m_fbo = new CFBO(
         "_sc_FullFrameBuffer",
         ITexture::TextureFormat::ARGB8888,
-        ITexture::TextureFlags::NoInterpolation,
+        ITexture::TextureFlags::NoFlags,
         1.0,
         fullWidth, fullHeight,
         fullWidth, fullHeight
@@ -188,12 +188,22 @@ void CContext::render ()
 
         for (; cur != end; cur ++)
         {
+            if (DEBUG)
+            {
+                std::string str = "Rendering to screen " + (*cur).name;
+
+                glPushDebugGroup (GL_DEBUG_SOURCE_APPLICATION, 0, -1, str.c_str ());
+            }
+
             // render the background
-            this->m_wallpaper->render (*cur, renderFrame, firstFrame);
+            this->m_wallpaper->render ((*cur).viewport, false, renderFrame, firstFrame);
             // scenes need to render a new frame for each viewport as they produce different results
             // but videos should only be rendered once per group of viewports
             firstFrame = false;
             renderFrame = !this->m_wallpaper->is <CVideo> ();
+
+            if (DEBUG)
+                glPopDebugGroup ();
         }
 
         // read the full texture into the image
@@ -214,7 +224,7 @@ void CContext::render ()
         XFlush(this->m_display);
     }
     else
-        this->m_wallpaper->render (this->m_defaultViewport);
+        this->m_wallpaper->render (this->m_defaultViewport, true);
 }
 
 void CContext::setWallpaper (CWallpaper* wallpaper)
@@ -225,12 +235,12 @@ void CContext::setWallpaper (CWallpaper* wallpaper)
     if (this->m_screens.empty () == false)
     {
         GLfloat texCoords [] = {
-                0.0f, 1.0f,
-                1.0f, 1.0f,
-                0.0f, 0.0f,
-                0.0f, 0.0f,
-                1.0f, 1.0f,
-                1.0f, 0.0f
+            0.0f, 1.0f,
+            1.0f, 1.0f,
+            0.0f, 0.0f,
+            0.0f, 0.0f,
+            1.0f, 1.0f,
+            1.0f, 0.0f
         };
 
         this->m_wallpaper->updateTexCoord (texCoords, sizeof (texCoords));

src/WallpaperEngine/Render/CContext.h

@@ -32,6 +32,12 @@ namespace WallpaperEngine::Render
         const ITexture* resolveTexture (const std::string& name);
 
     private:
+        struct viewport
+        {
+            glm::ivec4 viewport;
+            std::string name;
+        };
+
         Display* m_display;
         Pixmap m_pixmap;
         GC m_gc;
@@ -40,7 +46,7 @@ namespace WallpaperEngine::Render
         char* m_imageData;
         CFBO* m_fbo;
         std::vector <std::string> m_screens;
-        std::vector <glm::ivec4> m_viewports;
+        std::vector <viewport> m_viewports;
         glm::vec4 m_defaultViewport;
         CWallpaper* m_wallpaper;
         CMouseInput* m_mouse;

src/WallpaperEngine/Render/CVideo.cpp

@@ -101,8 +101,8 @@ CVideo::CVideo (Core::CVideo* video, CContext* context) :
     // configure the texture
     glBindTexture (GL_TEXTURE_2D, this->m_texture);
     // set filtering parameters, otherwise the texture is not rendered
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     // set texture basic data

src/WallpaperEngine/Render/CWallpaper.cpp

@@ -199,79 +199,97 @@ void CWallpaper::setDestinationFramebuffer (GLuint framebuffer)
     this->m_destFramebuffer = framebuffer;
 }
 
-void CWallpaper::render (glm::ivec4 viewport, bool renderFrame, bool newFrame)
+void CWallpaper::render (glm::ivec4 viewport, bool vflip, bool renderFrame, bool newFrame)
 {
     if (renderFrame == true)
         this->renderFrame (viewport);
 
-    int windowWidth = 1920;
-    int windowHeight = 1080;
+    int projectionWidth = 1920;
+    int projectionHeight = 1080;
 
     if (this->getWallpaperData ()->is <WallpaperEngine::Core::CScene> ())
     {
         auto projection = this->getWallpaperData ()->as <WallpaperEngine::Core::CScene> ()->getOrthogonalProjection ();
 
-        windowWidth = projection->getWidth ();
-        windowHeight = projection->getHeight ();
+        projectionWidth = projection->getWidth ();
+        projectionHeight = projection->getHeight ();
     }
     else if (this->is <WallpaperEngine::Render::CVideo> ())
     {
         auto video = this->as <WallpaperEngine::Render::CVideo> ();
 
-        windowWidth = video->getWidth ();
-        windowHeight = video->getHeight ();
+        projectionWidth = video->getWidth ();
+        projectionHeight = video->getHeight ();
     }
 
-    float widthRatio = windowWidth / (float) viewport.z;
-    float heightRatio = windowHeight / (float) viewport.w;
+    float ustart = 0.0f;
+    float uend = 0.0f;
+    float vstart = 0.0f;
+    float vend = 0.0f;
 
-    if (widthRatio > 1.0f)
+    if (
+        (viewport.w > viewport.z && projectionWidth >= projectionHeight) ||
+        (viewport.z > viewport.w && projectionHeight > projectionWidth)
+        )
     {
-        float diff = widthRatio - 1.0f;
-
-        widthRatio -= diff;
-        heightRatio -= diff;
+        if (vflip)
+        {
+            vstart = 0.0f;
+            vend = 1.0f;
+        }
+        else
+        {
+            vstart = 1.0f;
+            vend = 0.0f;
+        }
+
+        int newWidth = viewport.w / (float) projectionHeight * projectionWidth;
+        float newCenter = newWidth / 2.0f;
+        float viewportCenter = viewport.z / 2.0;
+
+        float left = newCenter - viewportCenter;
+        float right = newCenter + viewportCenter;
+
+        ustart = left / newWidth;
+        uend = right / newWidth;
     }
 
-    if (heightRatio > 1.0f)
+    if (
+        (viewport.z > viewport.w && projectionWidth >= projectionHeight) ||
+        (viewport.w > viewport.z && projectionHeight > projectionWidth)
+        )
     {
-        float diff = heightRatio - 1.0f;
-
-        widthRatio -= diff;
-        heightRatio -= diff;
+        ustart = 0.0f;
+        uend = 1.0f;
+
+        int newHeight = viewport.z / (float) projectionWidth * projectionHeight;
+        float newCenter = newHeight / 2.0f;
+        float viewportCenter = viewport.w / 2.0;
+
+        float down = newCenter - viewportCenter;
+        float up = newCenter + viewportCenter;
+
+        if (vflip)
+        {
+            vstart = down / newHeight;
+            vend = up / newHeight;
+        }
+        else
+        {
+            vstart = up / newHeight;
+            vend = down / newHeight;
+        }
     }
 
-    if (widthRatio < 1.0f)
-    {
-        float diff = 1.0f - widthRatio;
-
-        widthRatio += diff;
-        heightRatio += diff;
-    }
-
-    if (heightRatio < 1.0f)
-    {
-        float diff = 1.0f - heightRatio;
-
-        widthRatio += diff;
-        heightRatio += diff;
-    }
-
-    if (widthRatio < 0.0f) widthRatio = -widthRatio;
-    if (heightRatio < 0.0f) heightRatio = -heightRatio;
-
-    GLfloat position [] = {
-        -widthRatio, heightRatio, 0.0f,
-        widthRatio, heightRatio, 0.0f,
-        -widthRatio, -heightRatio, 0.0f,
-        -widthRatio, -heightRatio, 0.0f,
-        widthRatio, heightRatio, 0.0f,
-        widthRatio, -heightRatio, 0.0f
+    GLfloat texCoords [] = {
+        ustart, vstart,
+        uend, vstart,
+        ustart, vend,
+        ustart, vend,
+        uend, vstart,
+        uend, vend,
     };
 
-    glBindBuffer (GL_ARRAY_BUFFER, this->m_positionBuffer);
-    glBufferData (GL_ARRAY_BUFFER, sizeof (position), position, GL_STATIC_DRAW);
-
     glViewport (viewport.x, viewport.y, viewport.z, viewport.w);
 
     glBindFramebuffer (GL_FRAMEBUFFER, this->m_destFramebuffer);
@@ -289,6 +307,7 @@ void CWallpaper::render (glm::ivec4 viewport, bool renderFrame, bool newFrame)
     // set uniforms and attribs
     glEnableVertexAttribArray (this->a_TexCoord);
     glBindBuffer (GL_ARRAY_BUFFER, this->m_texCoordBuffer);
+    glBufferData (GL_ARRAY_BUFFER, sizeof (texCoords), texCoords, GL_STATIC_DRAW);
     glVertexAttribPointer (this->a_TexCoord, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
 
     glEnableVertexAttribArray (this->a_Position);
@@ -303,22 +322,22 @@ void CWallpaper::render (glm::ivec4 viewport, bool renderFrame, bool newFrame)
 
 void CWallpaper::setupFramebuffers ()
 {
-    int windowWidth = 1920;
-    int windowHeight = 1080;
+    int projectionWidth = 1920;
+    int projectionHeight = 1080;
 
     if (this->getWallpaperData ()->is <WallpaperEngine::Core::CScene> ())
     {
         auto projection = this->getWallpaperData ()->as <WallpaperEngine::Core::CScene> ()->getOrthogonalProjection ();
 
-        windowWidth = projection->getWidth ();
-        windowHeight = projection->getHeight ();
+        projectionWidth = projection->getWidth ();
+        projectionHeight = projection->getHeight ();
     }
     else if (this->is <WallpaperEngine::Render::CVideo> ())
     {
         auto video = this->as <WallpaperEngine::Render::CVideo> ();
 
-        windowWidth = video->getWidth ();
-        windowHeight = video->getHeight ();
+        projectionWidth = video->getWidth ();
+        projectionHeight = video->getHeight ();
     }
 
     // create framebuffer for the scene
@@ -327,8 +346,8 @@ void CWallpaper::setupFramebuffers ()
         ITexture::TextureFormat::ARGB8888,
         ITexture::TextureFlags::NoInterpolation,
         1.0,
-        windowWidth, windowHeight,
-        windowWidth, windowHeight
+        projectionWidth, projectionHeight,
+        projectionWidth, projectionHeight
     );
 }
 

src/WallpaperEngine/Render/CWallpaper.h

@@ -31,7 +31,7 @@ namespace WallpaperEngine::Render
         /**
          * Performs a render pass of the wallpaper
          */
-        void render (glm::ivec4 viewport, bool renderFrame = true, bool newFrame = true);
+        void render (glm::ivec4 viewport, bool vflip, bool renderFrame = true, bool newFrame = true);
 
         /**
          * @return The container to resolve files for this wallpaper

src/WallpaperEngine/Render/Objects/CImage.cpp

@@ -401,6 +401,21 @@ void CImage::render ()
     if (this->getScene ()->getScene ()->isCameraParallax () == true)
         this->updateScreenSpacePosition ();
 
+    if (DEBUG)
+    {
+        std::string str = "Rendering ";
+
+        if (this->getScene ()->getScene ()->isBloom () && this->getId () == 0xFFFFFFFF)
+            str += "bloom";
+        else
+        {
+            str += this->getImage ()->getName () +
+                   " (" + std::to_string (this->getId ()) + ", " + this->getImage ()->getMaterial ()->getName () + ")";
+        }
+
+        glPushDebugGroup (GL_DEBUG_SOURCE_APPLICATION, 0, -1, str.c_str ());
+    }
+
     auto cur = this->m_passes.begin ();
     auto end = this->m_passes.end ();
 
@@ -411,6 +426,9 @@ void CImage::render ()
 
         (*cur)->render ();
     }
+
+    if (DEBUG)
+        glPopDebugGroup ();
 }
 
 void CImage::updateScreenSpacePosition ()