From 3550a1170b354b3f7dd92df038f6e6d7c8e0dd7f Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 17 Feb 2022 22:26:16 +0100
Subject: initial import

---
 TexturedQuadExample.cpp | 95 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 TexturedQuadExample.cpp

(limited to 'TexturedQuadExample.cpp')

diff --git a/TexturedQuadExample.cpp b/TexturedQuadExample.cpp
new file mode 100644
index 00000000..ec166d6e
--- /dev/null
+++ b/TexturedQuadExample.cpp
@@ -0,0 +1,95 @@
+#include "chunk.hpp"
+
+#include <Corrade/Containers/Optional.h>
+#include <Corrade/Containers/ArrayViewStl.h>
+#include <Corrade/PluginManager/Manager.h>
+#include <Corrade/Utility/Resource.h>
+#include <Magnum/ImageView.h>
+#include <Magnum/GL/Buffer.h>
+#include <Magnum/GL/DefaultFramebuffer.h>
+#include <Magnum/GL/Mesh.h>
+#include <Magnum/GL/Texture.h>
+#include <Magnum/GL/TextureFormat.h>
+#include <Magnum/Platform/Sdl2Application.h>
+#include <Magnum/Trade/AbstractImporter.h>
+#include <Magnum/Trade/ImageData.h>
+
+#include "TexturedQuadShader.h"
+
+namespace Magnum::Examples {
+
+struct TexturedQuadExample: Platform::Application {
+    explicit TexturedQuadExample(const Arguments& arguments);
+    void drawEvent() override;
+
+    const Utility::Resource rs{"texturedquad-data"};
+    PluginManager::Manager<Trade::AbstractImporter> plugins;
+    Containers::Pointer<Trade::AbstractImporter> tga_importer =
+        plugins.loadAndInstantiate("TgaImporter");
+
+    GL::Mesh _mesh;
+    TexturedQuadShader _shader;
+    atlas_texture atlas = make_atlas("images/tiles.tga", {8, 4});
+
+    atlas_texture make_atlas(const std::string& file, Vector2i dims)
+    {
+        if(!tga_importer || !tga_importer->openFile(file))
+            std::exit(1);
+
+        Containers::Optional<Trade::ImageData2D> image = tga_importer->image2D(0);
+        CORRADE_INTERNAL_ASSERT(image);
+
+        return atlas_texture{*image, dims};
+    }
+};
+
+TexturedQuadExample::TexturedQuadExample(const Arguments& arguments):
+    Platform::Application{arguments, Configuration{}
+        .setTitle("Magnum Textured Quad Example")
+        .setSize({512, 512})}
+{
+    struct QuadVertex {
+        Vector3 position;
+        Vector2 textureCoordinates;
+    };
+    QuadVertex vertices[4];
+    auto positions = atlas.floor_quad({}, {2, 2});
+    auto texcoords = atlas.texcoords_for_id(2);
+    auto indices   = atlas.indices(0);
+
+    for (unsigned i = 0; i < std::size(vertices); i++)
+        vertices[i] = { positions[i], texcoords[i] };
+
+    _mesh.setCount(std::size(indices))
+        .addVertexBuffer(GL::Buffer{vertices}, 0,
+            TexturedQuadShader::Position{},
+            TexturedQuadShader::TextureCoordinates{})
+        .setIndexBuffer(GL::Buffer{indices}, 0,
+            GL::MeshIndexType::UnsignedShort);
+}
+
+void TexturedQuadExample::drawEvent() {
+    GL::defaultFramebuffer.clear(GL::FramebufferClear::Color);
+
+    using namespace Math::Literals;
+
+    _shader
+        .setColor(0xffffff_rgbf)
+        .bindTexture(atlas.texture())
+        .draw(_mesh);
+
+    swapBuffers();
+}
+
+} // namespace Magnum::Examples
+
+MAGNUM_APPLICATION_MAIN(Magnum::Examples::TexturedQuadExample);
+
+#include <windows.h>
+
+#if defined _MSC_VER
+int __stdcall WinMain(HINSTANCE, HINSTANCE, LPSTR, int /* nCmdShow */)
+{
+    return main(__argc, __argv);
+}
+#endif
-- 
cgit v1.2.3