aboutsummaryrefslogtreecommitdiff
path: root/image/codecs/msrle.cpp
diff options
context:
space:
mode:
authorMarisa-Chan2014-06-13 21:43:04 +0700
committerMarisa-Chan2014-06-13 21:43:04 +0700
commit45589950c0fb1a449351e6a00ef10d42290d8bae (patch)
tree44e4eedcb7e69d5fc386155b000ed038af07251d /image/codecs/msrle.cpp
parent48360645dcd5f8fddb135b6e31ae5cae4be8d77f (diff)
parent5c005ad3a3f1df0bc968c85c1cf0fc48e36ab0b2 (diff)
downloadscummvm-rg350-45589950c0fb1a449351e6a00ef10d42290d8bae.tar.gz
scummvm-rg350-45589950c0fb1a449351e6a00ef10d42290d8bae.tar.bz2
scummvm-rg350-45589950c0fb1a449351e6a00ef10d42290d8bae.zip
Merge remote-tracking branch 'upstream/master' into zvision
Conflicts: engines/zvision/animation/rlf_animation.cpp engines/zvision/animation_control.h engines/zvision/core/console.cpp engines/zvision/core/events.cpp engines/zvision/cursors/cursor.cpp engines/zvision/cursors/cursor_manager.cpp engines/zvision/cursors/cursor_manager.h engines/zvision/fonts/truetype_font.cpp engines/zvision/graphics/render_manager.cpp engines/zvision/graphics/render_manager.h engines/zvision/inventory/inventory_manager.h engines/zvision/inventory_manager.h engines/zvision/meta_animation.h engines/zvision/module.mk engines/zvision/scripting/actions.cpp engines/zvision/scripting/control.h engines/zvision/scripting/controls/animation_control.cpp engines/zvision/scripting/controls/animation_control.h engines/zvision/scripting/controls/input_control.cpp engines/zvision/scripting/controls/lever_control.cpp engines/zvision/scripting/controls/timer_node.cpp engines/zvision/scripting/controls/timer_node.h engines/zvision/scripting/puzzle.h engines/zvision/scripting/scr_file_handling.cpp engines/zvision/scripting/script_manager.cpp engines/zvision/scripting/script_manager.h engines/zvision/sidefx.cpp engines/zvision/sound/zork_raw.cpp engines/zvision/sound/zork_raw.h engines/zvision/video/video.cpp engines/zvision/video/zork_avi_decoder.h engines/zvision/zvision.cpp engines/zvision/zvision.h
Diffstat (limited to 'image/codecs/msrle.cpp')
-rw-r--r--image/codecs/msrle.cpp132
1 files changed, 132 insertions, 0 deletions
diff --git a/image/codecs/msrle.cpp b/image/codecs/msrle.cpp
new file mode 100644
index 0000000000..89fe869a9e
--- /dev/null
+++ b/image/codecs/msrle.cpp
@@ -0,0 +1,132 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+// Based off ffmpeg's msrledec.c
+
+#include "image/codecs/msrle.h"
+#include "common/stream.h"
+#include "common/textconsole.h"
+
+namespace Image {
+
+MSRLEDecoder::MSRLEDecoder(uint16 width, uint16 height, byte bitsPerPixel) {
+ _surface = new Graphics::Surface();
+ _surface->create(width, height, Graphics::PixelFormat::createFormatCLUT8());
+ _bitsPerPixel = bitsPerPixel;
+}
+
+MSRLEDecoder::~MSRLEDecoder() {
+ _surface->free();
+ delete _surface;
+}
+
+const Graphics::Surface *MSRLEDecoder::decodeFrame(Common::SeekableReadStream &stream) {
+ if (_bitsPerPixel == 8) {
+ decode8(stream);
+ } else
+ error("Unhandled %d bit Microsoft RLE encoding", _bitsPerPixel);
+
+ return _surface;
+}
+
+void MSRLEDecoder::decode8(Common::SeekableReadStream &stream) {
+
+ int x = 0;
+ int y = _surface->h - 1;
+
+ byte *data = (byte *) _surface->getPixels();
+ uint16 width = _surface->w;
+ uint16 height = _surface->h;
+
+ byte *output = data + ((height - 1) * width);
+ byte *output_end = data + ((height) * width);
+
+ while (!stream.eos()) {
+ byte count = stream.readByte();
+ byte value = stream.readByte();
+
+ if (count == 0) {
+ if (value == 0) {
+ // End of line
+
+ x = 0;
+ y--;
+ output = data + (y * width);
+
+ if (y < 0) {
+ warning("MS RLE Codec: Next line is beyond picture bounds");
+ return;
+ }
+
+ } else if (value == 1) {
+ // End of image
+
+ return;
+ } else if (value == 2) {
+ // Skip
+
+ count = stream.readByte();
+ value = stream.readByte();
+
+ y -= value;
+ x += count;
+
+ if (y < 0) {
+ warning("MS RLE Codec: Skip beyond picture bounds");
+ return;
+ }
+
+ output = data + ((y * width) + x);
+
+ } else {
+ // Copy data
+
+ if (output + value > output_end) {
+ stream.skip(value);
+ continue;
+ }
+
+ for (int i = 0; i < value; i++)
+ *output++ = stream.readByte();
+
+ if (value & 1)
+ stream.skip(1);
+
+ x += value;
+ }
+
+ } else {
+ // Run data
+
+ if (output + count > output_end)
+ continue;
+
+ for (int i = 0; i < count; i++, x++)
+ *output++ = value;
+ }
+
+ }
+
+ warning("MS RLE Codec: No end-of-picture code");
+}
+
+} // End of namespace Image