Android image file loading

justindriggers · Feb 24, 2024 · 0f95c05 · 0f95c05
1 parent 0bb4ce4
commit 0f95c05
Show file tree

Hide file tree

Showing 4 changed files with 47 additions and 4 deletions.
diff --git a/carbonara/app/build.gradle.kts b/carbonara/app/build.gradle.kts
@@ -41,6 +41,14 @@ android {
             version = "3.22.1"
         }
     }
+    sourceSets {
+        named("main") {
+            assets.srcDirs(
+                "../../assets/audio/",
+                "../../assets/fonts/"
+            )
+        }
+    }
 }
 
 dependencies {

diff --git a/carbonara/app/src/main/cpp/ApplicationAdapter.cpp b/carbonara/app/src/main/cpp/ApplicationAdapter.cpp
@@ -63,7 +63,7 @@ ApplicationAdapter::ApplicationAdapter(android_app& app) {
   _context = context;
 
   auto renderer = std::shared_ptr<render::OpenGLRenderer>(
-      render::OpenGLRenderer::create(std::make_unique<AndroidOpenGLFileLoader>())
+      render::OpenGLRenderer::create(std::make_unique<AndroidOpenGLFileLoader>(*app.activity->assetManager))
   );
 
   auto logger = std::make_shared<AndroidLogger>();

diff --git a/carbonara/app/src/main/cpp/platform/AndroidOpenGLFileLoader.cpp b/carbonara/app/src/main/cpp/platform/AndroidOpenGLFileLoader.cpp
@@ -1,12 +1,39 @@
 #include "AndroidOpenGLFileLoader.h"
 
+#include <string>
+
+#include <android/imagedecoder.h>
+
 namespace linguine::carbonara {
 
 render::OpenGLFileLoader::ImageFile AndroidOpenGLFileLoader::getImage() const {
+  const auto filename = std::string("font.png");
+
+  auto image = AAssetManager_open(&_assetManager, filename.data(), AASSET_MODE_BUFFER);
+
+  AImageDecoder* decoder;
+  if (AImageDecoder_createFromAAsset(image, &decoder) != ANDROID_IMAGE_DECODER_SUCCESS) {
+    return {};
+  }
+
+  AImageDecoder_setAndroidBitmapFormat(decoder, ANDROID_BITMAP_FORMAT_RGBA_8888);
+
+  const AImageDecoderHeaderInfo* header;
+  header = AImageDecoder_getHeaderInfo(decoder);
+
+  auto width = AImageDecoderHeaderInfo_getWidth(header);
+  auto height = AImageDecoderHeaderInfo_getHeight(header);
+  auto stride = AImageDecoder_getMinimumStride(decoder);
+
+  auto data = std::vector<std::byte>(height * stride);
+  if (AImageDecoder_decodeImage(decoder, data.data(), stride, data.size()) != ANDROID_IMAGE_DECODER_SUCCESS) {
+    return {};
+  }
+
   return ImageFile {
-      .width = 0,
-      .height = 0,
-      .data = std::vector<std::byte>(0)
+      .width = width,
+      .height = height,
+      .data = data
   };
 }
 

diff --git a/carbonara/app/src/main/cpp/platform/AndroidOpenGLFileLoader.h b/carbonara/app/src/main/cpp/platform/AndroidOpenGLFileLoader.h
@@ -2,13 +2,21 @@
 
 #include <OpenGLFileLoader.h>
 
+#include <android/asset_manager.h>
+
 namespace linguine::carbonara {
 
 class AndroidOpenGLFileLoader : public render::OpenGLFileLoader {
   public:
+    explicit AndroidOpenGLFileLoader(AAssetManager& assetManager)
+        : _assetManager(assetManager) {}
+
     ~AndroidOpenGLFileLoader() override = default;
 
     [[nodiscard]] ImageFile getImage() const override;
+
+  private:
+    AAssetManager& _assetManager;
 };
 
 }  // namespace linguine::carbonara