LibGfx: Move all image loaders and writers to a subdirectory

Userland/Libraries/LibGfx/ImageFormats/PBMLoader.cpp

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2020, Hüseyin ASLITÜRK <asliturk@hotmail.com>
+ * Copyright (c) 2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "PBMLoader.h"
+#include "AK/Endian.h"
+#include "PortableImageLoaderCommon.h"
+#include "Userland/Libraries/LibGfx/Streamer.h"
+#include <string.h>
+
+namespace Gfx {
+
+bool read_image_data(PBMLoadingContext& context, Streamer& streamer)
+{
+    u8 byte;
+    Vector<Gfx::Color> color_data;
+
+    if (context.type == PBMLoadingContext::Type::ASCII) {
+        while (streamer.read(byte)) {
+            if (byte == '0') {
+                color_data.append(Color::White);
+            } else if (byte == '1') {
+                color_data.append(Color::Black);
+            }
+        }
+    } else if (context.type == PBMLoadingContext::Type::RAWBITS) {
+        size_t color_index = 0;
+
+        while (streamer.read(byte)) {
+            for (int i = 0; i < 8; i++) {
+                int val = byte & 0x80;
+
+                if (val == 0) {
+                    color_data.append(Color::White);
+                } else {
+                    color_data.append(Color::Black);
+                }
+
+                byte = byte << 1;
+                color_index++;
+
+                if (color_index % context.width == 0) {
+                    break;
+                }
+            }
+        }
+    }
+
+    size_t context_size = (u32)context.width * (u32)context.height;
+    if (context_size != color_data.size()) {
+        dbgln("Not enough color data in image.");
+        return false;
+    }
+
+    if (!create_bitmap(context)) {
+        return false;
+    }
+
+    set_pixels(context, color_data);
+
+    context.state = PBMLoadingContext::State::Bitmap;
+    return true;
+}
+}