Added ETC2 and ASTC texture variants (Refs #174)

android/texture/build.bat

@@ -1,24 +0,0 @@
-cd jni
-call ndk-build
-if %ERRORLEVEL% EQU 0 (
-	echo ndk-build has failed, build cancelled
-	cd..
-
-	mkdir "assets\shaders\base"
-	xcopy "..\..\data\shaders\base\*.spv" "assets\shaders\base" /Y
-	
-
-	mkdir "assets\shaders\texture"
-	xcopy "..\..\data\shaders\texture\*.spv" "assets\shaders\texture" /Y
-
-	mkdir "assets\textures"
-	xcopy "..\..\data\textures\pattern_02_bc2.ktx" "assets\textures" /Y
-	
-	mkdir "res\drawable"
-	xcopy "..\..\android\images\icon.png" "res\drawable" /Y
-
-	call ant debug -Dout.final.file=vulkanTexture.apk
-) ELSE (
-	echo error : ndk-build failed with errors!
-	cd..
-)

android/texture/build.py

@@ -0,0 +1,48 @@
+import os
+import shutil
+import subprocess
+import sys
+import glob
+
+APK_NAME = "vulkanTexture"
+SHADER_DIR = "texture"
+ASSETS_TEXTURES = ["metalplate01_bc2_unorm.ktx", "metalplate01_astc_8x8_unorm.ktx", "metalplate01_etc2_unorm.ktx"]
+
+if subprocess.call("ndk-build", shell=True) == 0:   
+    print("Build successful")
+
+    # Assets
+    if not os.path.exists("./assets"):
+        os.makedirs("./assets")  
+
+    # Shaders    
+    # Base
+    if not os.path.exists("./assets/shaders/base"):
+        os.makedirs("./assets/shaders/base")           
+    for file in glob.glob("../../data/shaders/base/*.spv"):
+        shutil.copy(file, "./assets/shaders/base")    
+    # Sample
+    if not os.path.exists("./assets/shaders/%s" % SHADER_DIR):
+        os.makedirs("./assets/shaders/%s" % SHADER_DIR)
+    for file in glob.glob("../../data/shaders/%s/*.spv" %SHADER_DIR):
+        shutil.copy(file, "./assets/shaders/%s" % SHADER_DIR)    
+    # Textures
+    if not os.path.exists("./assets/textures"):
+        os.makedirs("./assets/textures")           
+    for file in ASSETS_TEXTURES:
+        shutil.copy("../../data/textures/%s" % file, "./assets/textures")        
+
+    # Icon
+    if not os.path.exists("./res/drawable"):
+        os.makedirs("./res/drawable")         
+    shutil.copy("../../android/images/icon.png", "./res/drawable")      
+
+    if subprocess.call("ant debug -Dout.final.file=%s.apk" % APK_NAME, shell=True) == 0:
+        if len(sys.argv) > 1:
+            if sys.argv[1] == "-deploy":
+                if subprocess.call("adb install -r %s.apk" % APK_NAME, shell=True) != 0:
+                    print("Could not deploy to device!")
+    else:
+        print("Error during build process!")
+else:
+    print("Error building project!")

texture/texture.cpp

@@ -79,7 +79,7 @@ public:
 	{
 		zoom = -2.5f;
 		rotation = { 0.0f, 15.0f, 0.0f };
-		title = "Vulkan Example - Texturing";
+		title = "Vulkan Example - Texture loading";
 		enableTextOverlay = true;
 	}
 
@@ -591,6 +591,26 @@ public:
 			indices.data()));
 	}
 
+	// Texture loading is done here
+	void loadAssets()
+	{
+		// Vulkan core supports three different compressed texture formats
+		// As the support differs between implemementations we need to check and load the proper texture
+		// Block compression (BC) is common on desktops, ETC and ASTC on mobile
+		if (deviceFeatures.textureCompressionBC) {
+			loadTexture(getAssetPath() + "textures/metalplate01_bc2_unorm.ktx", VK_FORMAT_BC2_UNORM_BLOCK, false);
+		}
+		else if (deviceFeatures.textureCompressionASTC_LDR) {
+			loadTexture(getAssetPath() + "textures/metalplate01_astc_8x8_unorm.ktx", VK_FORMAT_ASTC_8x8_UNORM_BLOCK, false);
+		}
+		else if (deviceFeatures.textureCompressionETC2) {
+			loadTexture(getAssetPath() + "textures/metalplate01_etc2_unorm.ktx", VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK, false);
+		}
+		else {
+			vks::tools::exitFatal("Device does not support any compressed texture format!", "Error");
+		}
+	}
+
 	void setupVertexDescriptions()
 	{
 		// Binding description
@@ -828,13 +848,10 @@ public:
 	void prepare()
 	{
 		VulkanExampleBase::prepare();
+		loadAssets();
 		generateQuad();
 		setupVertexDescriptions();
 		prepareUniformBuffers();
-		loadTexture(
-			getAssetPath() + "textures/pattern_02_bc2.ktx", 
-			VK_FORMAT_BC2_UNORM_BLOCK, 
-			false);
 		setupDescriptorSetLayout();
 		preparePipelines();
 		setupDescriptorPool();