Adding upstream version 1.3+ds.upstream/1.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/src/ui/widget/canvas/texture.h b/src/ui/widget/canvas/texture.h
new file mode 100644
index 0000000..98aeba2
--- /dev/null
+++ b/src/ui/widget/canvas/texture.h
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef INKSCAPE_UI_WIDGET_CANVAS_TEXTURE_H
+#define INKSCAPE_UI_WIDGET_CANVAS_TEXTURE_H
+
+#include <boost/noncopyable.hpp>
+#include <2geom/point.h>
+#include <epoxy/gl.h>
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+class Texture
+{
+public:
+    // Create null texture owning no resources.
+    Texture() = default;
+
+    // Allocate a blank texture of a given size. The texture is bound to GL_TEXTURE_2D.
+    Texture(Geom::IntPoint const &size);
+
+    // Wrap an existing texture.
+    Texture(GLuint id, Geom::IntPoint const &size) : _id(id), _size(size) {}
+
+    // Boilerplate constructors/operators
+    Texture(Texture &&other) noexcept { _movefrom(other); }
+    Texture &operator=(Texture &&other) noexcept { _reset(); _movefrom(other); return *this; }
+    ~Texture() { _reset(); }
+
+    // Observers
+    GLuint id() const { return _id; }
+    Geom::IntPoint const &size() const { return _size; }
+    explicit operator bool() const { return _id; }
+
+    // Methods
+    void clear() { _reset(); _id = 0; }
+    void invalidate();
+
+private:
+    GLuint _id = 0;
+    Geom::IntPoint _size;
+
+    void _reset() noexcept { if (_id) glDeleteTextures(1, &_id); }
+    void _movefrom(Texture &other) noexcept { _id = other._id; _size = other._size; other._id = 0; }
+};
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_WIDGET_CANVAS_TEXTURE_H
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :