a

1 files changed, 47 insertions, 0 deletions

diff --git a/draw/wireframe-mesh.cpp b/draw/wireframe-mesh.cpp
new file mode 100644
index 00000000..1425df60
--- /dev/null
+++ b/draw/wireframe-mesh.cpp
@@ -0,0 +1,47 @@
+#include "wireframe-mesh.hpp"
+#include "shaders/tile-shader.hpp"
+#include <Corrade/Containers/Array.h>
+#include <Magnum/GL/Renderer.h>
+#include <Magnum/GL/TextureFormat.h>
+#include <Magnum/ImageFlags.h>
+#include <Magnum/ImageView.h>
+#include <Magnum/PixelFormat.h>
+#include <Magnum/PixelStorage.h>
+#include <Magnum/Trade/ImageData.h>
+
+namespace Magnum::Examples::wireframe
+{
+
+GL::RectangleTexture mesh_base::make_constant_texture()
+{
+    const Vector4ub data[] = { {255, 255, 255, 255} };
+    Trade::ImageData2D img{PixelStorage{}.setImageHeight(1).setRowLength(1).setAlignment(1),
+                           PixelFormat::RGBA8Unorm, {1, 1}, {},
+                           Containers::arrayView(data, 1), {}, {}};
+    GL::RectangleTexture tex;
+    tex.setWrapping(GL::SamplerWrapping::ClampToEdge)
+       .setMagnificationFilter(GL::SamplerFilter::Nearest)
+       .setMinificationFilter(GL::SamplerFilter::Nearest)
+       .setMaxAnisotropy(1)
+       .setStorage(GL::textureFormat(img.format()), img.size())
+       .setSubImage({}, std::move(img));
+    return tex;
+}
+
+mesh_base::mesh_base(GL::MeshPrimitive primitive, std::size_t num_vertices) :
+    _texcoords_buffer{std::vector<Vector2>{num_vertices}}
+{
+    _mesh.setCount((int)num_vertices)
+        .setPrimitive(primitive)
+        .addVertexBuffer(_vertex_buffer, 0, tile_shader::Position{})
+        .addVertexBuffer(_texcoords_buffer, 0, tile_shader::TextureCoordinates{});
+}
+
+void mesh_base::draw(tile_shader& shader)
+{
+    _texture.bind(0);
+    shader.draw(_mesh);
+}
+
+
+} // namespace Magnum::Examples::wireframe