LibGUI: Add missing Texture files

userspace/libraries/LibGUI/include/LibGUI/Texture.h

@@ -0,0 +1,81 @@
+#pragma once
+
+#include <BAN/StringView.h>
+
+#include <stdint.h>
+
+namespace LibFont { class Font; }
+
+namespace LibGUI
+{
+
+	class Texture
+	{
+	public:
+		static BAN::ErrorOr<Texture> create(uint32_t width, uint32_t height, uint32_t color);
+
+		BAN::ErrorOr<void> resize(uint32_t width, uint32_t height);
+
+		void set_pixel(uint32_t x, uint32_t y, uint32_t color)
+		{
+			ASSERT(x < m_width);
+			ASSERT(y < m_height);
+			m_pixels[y * m_width + x] = color;
+		}
+
+		uint32_t get_pixel(uint32_t x, uint32_t y) const
+		{
+			ASSERT(x < m_width);
+			ASSERT(y < m_height);
+			return m_pixels[y * m_width + x];
+		}
+
+		BAN::Span<uint32_t> pixels() { return m_pixels.span(); }
+
+		void fill_rect(int32_t x, int32_t y, uint32_t width, uint32_t height, uint32_t color);
+		void fill(uint32_t color) { return fill_rect(0, 0, width(), height(), color); }
+
+		void copy_texture(const Texture& texture, int32_t x, int32_t y);
+
+		void draw_character(uint32_t codepoint, const LibFont::Font& font, int32_t x, int32_t y, uint32_t color);
+		void draw_text(BAN::StringView text, const LibFont::Font& font, int32_t x, int32_t y, uint32_t color);
+
+		// shift whole vertically by amount pixels, sign determines the direction
+		// fill_color is used to fill "new" data
+		void shift_vertical(int32_t amount, uint32_t fill_color);
+
+		// copy horizontal slice [src_y, src_y + amount[ to [dst_y, dst_y + amount[
+		// fill_color is used when copying data outside of window bounds
+		void copy_horizontal_slice(int32_t dst_y, int32_t src_y, uint32_t amount, uint32_t fill_color);
+
+		// copy rect (src_x, src_y, width, height) to (dst_x, dst_y, width, height)
+		// fill_color is used when copying data outside of window bounds
+		void copy_rect(int32_t dst_x, int32_t dst_y, int32_t src_x, int32_t src_y, uint32_t width, uint32_t height, uint32_t fill_color);
+
+		uint32_t width() const { return m_width; }
+		uint32_t height() const { return m_height; }
+
+		// used on resize to fill empty space
+		void set_bg_color(uint32_t bg_color) { m_bg_color = bg_color; }
+
+	private:
+		Texture() = default;
+		Texture(BAN::Vector<uint32_t>&& pixels, uint32_t width, uint32_t height, uint32_t color)
+			: m_pixels(BAN::move(pixels))
+			, m_width(width)
+			, m_height(height)
+			, m_bg_color(color)
+		{}
+
+		bool clamp_to_texture(int32_t& x, int32_t& y, uint32_t& width, uint32_t& height) const;
+
+	private:
+		BAN::Vector<uint32_t> m_pixels;
+		uint32_t m_width { 0 };
+		uint32_t m_height { 0 };
+		uint32_t m_bg_color { 0xFFFFFFFF };
+
+		friend class Window;
+	};
+
+}