ret(texture): texture example returned

Author: beryll1um

examples/texture/CMakeLists.txt

@@ -0,0 +1,7 @@
+project(texture)
+
+add_executable(${PROJECT_NAME} "${PROJECT_NAME}.cpp")
+target_link_libraries(${PROJECT_NAME} PUBLIC ${UNIFIED_PROJECT})
+
+file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/image.png
+    DESTINATION ${CMAKE_CURRENT_BINARY_DIR})

examples/texture/image.png

@@ -0,0 +1,62 @@
+#include <unified.hpp>
+
+#include <unified/graphics/2d/drawable/texture.hpp>
+
+using namespace Unified;
+using namespace Unified::Graphics;
+
+class TextureLayer : public Layer
+{
+public:
+
+    const Application *application;
+
+    Graphics2D::Texture texture;
+
+    Graphics::Vertex2d quad_vertices[4] =
+    { { { -0.8, -0.8 }, { 1.0, 1.0 } },
+      { { -0.8,  0.8 }, { 1.0, 0.0 } },
+      { {  0.8,  0.8 }, { 0.0, 0.0 } },
+      { {  0.8, -0.8 }, { 0.0, 1.0 } } };
+
+    TextureLayer(Application *application) : application(application), texture("image.png")  {
+        texture.write(quad_vertices, sizeof(quad_vertices));
+    }
+
+    virtual void OnUpdate(Time) override {
+        application->draw(texture);
+    }
+
+};
+
+class ExampleLayers : public Application
+{
+public:
+
+    void window_resize_event(const WindowResizeEvent &event) {
+        set_viewport(event.size);
+    }
+
+public:
+
+    ExampleLayers() : Application("ExampleTexture") {
+        push_layer<TextureLayer>(this);
+        set_frame_limit(60);
+    }
+
+    virtual bool OnUpdate(Time) override {
+        clear({ 0.15, 0.15, 0.15 });
+        process_layers();
+        swap_buffers();
+        return poll_events();
+    }
+
+    virtual void OnEvent(EventDispatcher &dispatcher) override {
+        dispatcher.dispatch<WindowResizeEvent>(BIND_EVENT_FN(&ExampleLayers::window_resize_event, this));
+    }
+
+};
+
+Application *UNIFIED_NAMESPACE::CreateApplication() {
+    return new ExampleLayers();
+}

examples/texture/texture.cpp

@@ -8,6 +8,9 @@ UNIFIED_GRAPHICS_BEGIN_NAMESPACE
 RenderTarget::RenderTarget() {
     if (!gladLoadGL())
         throw Exceptions::initialization_failed("failed to initialize glad");
+
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 }
 
 void RenderTarget::clear(const Color &color) {