From bc6b43b7bea23c9581175f4eca00794b5ff25e7e Mon Sep 17 00:00:00 2001
From: Brad Davis <bdavis@saintandreas.org>
Date: Thu, 8 Sep 2016 11:20:37 -0700
Subject: [PATCH] Add debug option to lower texture resolution

---
 interface/src/Application.cpp            |  2 +-
 interface/src/Menu.cpp                   | 10 ++++++++++
 libraries/model/src/model/TextureMap.cpp | 23 +++++++++++++++--------
 3 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 904a6c5b65..f475bf18e2 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -2006,7 +2006,7 @@ void Application::resizeGL() {
     static qreal lastDevicePixelRatio = 0;
     qreal devicePixelRatio = _window->devicePixelRatio();
     if (offscreenUi->size() != fromGlm(uiSize) || devicePixelRatio != lastDevicePixelRatio) {
-        qDebug() << "Device pixel ratio changed, triggering resize";
+        qDebug() << "Device pixel ratio changed, triggering resize to " << uiSize;
         offscreenUi->resize(fromGlm(uiSize), true);
         _offscreenContext->makeCurrent();
         lastDevicePixelRatio = devicePixelRatio;
diff --git a/interface/src/Menu.cpp b/interface/src/Menu.cpp
index d3caa4a092..08abbf63d2 100644
--- a/interface/src/Menu.cpp
+++ b/interface/src/Menu.cpp
@@ -47,6 +47,8 @@
 
 #include "Menu.h"
 
+extern bool DEV_DECIMATE_TEXTURES;
+
 Menu* Menu::getInstance() {
     return dynamic_cast<Menu*>(qApp->getWindow()->menuBar());
 }
@@ -390,6 +392,14 @@ Menu::Menu() {
     // Developer > Render > LOD Tools
     addActionToQMenuAndActionHash(renderOptionsMenu, MenuOption::LodTools, 0, dialogsManager.data(), SLOT(lodTools()));
 
+    // HACK enable texture decimation
+    {
+        auto action = addCheckableActionToQMenuAndActionHash(renderOptionsMenu, "Decimate Textures");
+        connect(action, &QAction::triggered, [&](bool checked) {
+            DEV_DECIMATE_TEXTURES = checked;
+        });
+    }
+
     // Developer > Assets >>>
     MenuWrapper* assetDeveloperMenu = developerMenu->addMenu("Assets");
     auto& atpMigrator = ATPAssetMigrator::getInstance();
diff --git a/libraries/model/src/model/TextureMap.cpp b/libraries/model/src/model/TextureMap.cpp
index 754862aa4a..9345124d54 100755
--- a/libraries/model/src/model/TextureMap.cpp
+++ b/libraries/model/src/model/TextureMap.cpp
@@ -22,6 +22,13 @@ using namespace gpu;
 // FIXME: Declare this to enable compression
 //#define COMPRESS_TEXTURES
 
+bool DEV_DECIMATE_TEXTURES = false;
+QImage processSourceImage(const QImage& srcImage) {
+    if (DEV_DECIMATE_TEXTURES) {
+        return srcImage.scaled(srcImage.size() * 0.5f);
+    }
+    return srcImage;
+}
 
 void TextureMap::setTextureSource(TextureSourcePointer& textureSource) {
     _textureSource = textureSource;
@@ -53,7 +60,7 @@ void TextureMap::setLightmapOffsetScale(float offset, float scale) {
 }
 
 const QImage TextureUsage::process2DImageColor(const QImage& srcImage, bool& validAlpha, bool& alphaAsMask) {
-    QImage image = srcImage;
+    QImage image = processSourceImage(srcImage);
     validAlpha = false;
     alphaAsMask = true;
     const uint8 OPAQUE_ALPHA = 255;
@@ -221,7 +228,7 @@ gpu::Texture* TextureUsage::createLightmapTextureFromImage(const QImage& srcImag
 
 
 gpu::Texture* TextureUsage::createNormalTextureFromNormalImage(const QImage& srcImage, const std::string& srcImageName) {
-    QImage image = srcImage;
+    QImage image = processSourceImage(srcImage);
 
     if (image.format() != QImage::Format_RGB888) {
         image = image.convertToFormat(QImage::Format_RGB888);
@@ -254,8 +261,8 @@ double mapComponent(double sobelValue) {
 }
 
 gpu::Texture* TextureUsage::createNormalTextureFromBumpImage(const QImage& srcImage, const std::string& srcImageName) {
-    QImage image = srcImage;
-    
+    QImage image = processSourceImage(srcImage);
+
     if (image.format() != QImage::Format_RGB888) {
         image = image.convertToFormat(QImage::Format_RGB888);
     }
@@ -325,7 +332,7 @@ gpu::Texture* TextureUsage::createNormalTextureFromBumpImage(const QImage& srcIm
 }
 
 gpu::Texture* TextureUsage::createRoughnessTextureFromImage(const QImage& srcImage, const std::string& srcImageName) {
-    QImage image = srcImage;
+    QImage image = processSourceImage(srcImage);
     if (!image.hasAlphaChannel()) {
         if (image.format() != QImage::Format_RGB888) {
             image = image.convertToFormat(QImage::Format_RGB888);
@@ -358,7 +365,7 @@ gpu::Texture* TextureUsage::createRoughnessTextureFromImage(const QImage& srcIma
 }
 
 gpu::Texture* TextureUsage::createRoughnessTextureFromGlossImage(const QImage& srcImage, const std::string& srcImageName) {
-    QImage image = srcImage;
+    QImage image = processSourceImage(srcImage);
     if (!image.hasAlphaChannel()) {
         if (image.format() != QImage::Format_RGB888) {
             image = image.convertToFormat(QImage::Format_RGB888);
@@ -395,7 +402,7 @@ gpu::Texture* TextureUsage::createRoughnessTextureFromGlossImage(const QImage& s
 }
 
 gpu::Texture* TextureUsage::createMetallicTextureFromImage(const QImage& srcImage, const std::string& srcImageName) {
-    QImage image = srcImage;
+    QImage image = processSourceImage(srcImage);
     if (!image.hasAlphaChannel()) {
         if (image.format() != QImage::Format_RGB888) {
             image = image.convertToFormat(QImage::Format_RGB888);
@@ -687,7 +694,7 @@ const int CubeLayout::NUM_CUBEMAP_LAYOUTS = sizeof(CubeLayout::CUBEMAP_LAYOUTS)
 gpu::Texture* TextureUsage::processCubeTextureColorFromImage(const QImage& srcImage, const std::string& srcImageName, bool isLinear, bool doCompress, bool generateMips, bool generateIrradiance) {
     gpu::Texture* theTexture = nullptr;
     if ((srcImage.width() > 0) && (srcImage.height() > 0)) {
-        QImage image = srcImage;
+        QImage image = processSourceImage(srcImage);
         if (image.format() != QImage::Format_RGB888) {
             image = image.convertToFormat(QImage::Format_RGB888);
         }