webp: Make it a module and unbundle libwebp thirdparty files

Note that there are two Godot-specific changes made to libwebp
for the javascript/HTML5 platform. They are documented in the
README.md.

6 files changed, 432 insertions, 0 deletions

diff --git a/modules/webp/SCsub b/modules/webp/SCsub
new file mode 100644
index 0000000000..f52c5b9af8
--- /dev/null
+++ b/modules/webp/SCsub
@@ -0,0 +1,120 @@
+Import('env')
+Import('env_modules')
+
+# Thirdparty source files
+if (env["libwebp"] != "system"): # builtin
+	thirdparty_dir = "#thirdparty/libwebp/"
+	thirdparty_libwebp_sources = [
+		"enc/webpenc.c",
+		"enc/near_lossless.c",
+		"enc/frame.c",
+		"enc/alpha.c",
+		"enc/picture_csp.c",
+		"enc/vp8l.c",
+		"enc/picture_psnr.c",
+		"enc/delta_palettization.c",
+		"enc/syntax.c",
+		"enc/backward_references.c",
+		"enc/token.c",
+		"enc/analysis.c",
+		"enc/iterator.c",
+		"enc/picture_tools.c",
+		"enc/picture_rescale.c",
+		"enc/config.c",
+		"enc/tree.c",
+		"enc/cost.c",
+		"enc/picture.c",
+		"enc/quant.c",
+		"enc/filter.c",
+		"enc/histogram.c",
+		"utils/rescaler.c",
+		"utils/filters.c",
+		"utils/quant_levels_dec.c",
+		"utils/huffman.c",
+		"utils/thread.c",
+		"utils/quant_levels.c",
+		"utils/bit_writer.c",
+		"utils/bit_reader.c",
+		"utils/random.c",
+		"utils/utils.c",
+		"utils/huffman_encode.c",
+		"utils/color_cache.c",
+		"mux/muxinternal.c",
+		"mux/muxread.c",
+		"mux/anim_encode.c",
+		"mux/muxedit.c",
+		"dec/webp.c",
+		"dec/frame.c",
+		"dec/alpha.c",
+		"dec/vp8l.c",
+		"dec/io.c",
+		"dec/vp8.c",
+		"dec/idec.c",
+		"dec/tree.c",
+		"dec/buffer.c",
+		"dec/quant.c",
+		"demux/demux.c",
+		"demux/anim_decode.c",
+		"dsp/yuv.c",
+		"dsp/filters_sse2.c",
+		"dsp/dec_sse41.c",
+		"dsp/rescaler.c",
+		"dsp/lossless_sse2.c",
+		"dsp/alpha_processing_sse41.c",
+		"dsp/alpha_processing_sse2.c",
+		"dsp/filters.c",
+		"dsp/upsampling_mips_dsp_r2.c",
+		"dsp/dec_neon.c",
+		"dsp/enc_neon.c",
+		"dsp/lossless_enc_mips32.c",
+		"dsp/lossless_enc_sse2.c",
+		"dsp/upsampling.c",
+		"dsp/lossless_enc_neon.c",
+		"dsp/alpha_processing.c",
+		"dsp/cost_sse2.c",
+		"dsp/dec_mips32.c",
+		"dsp/enc_avx2.c",
+		"dsp/rescaler_mips32.c",
+		"dsp/enc.c",
+		"dsp/lossless_enc_sse41.c",
+		"dsp/cost_mips32.c",
+		"dsp/lossless_mips_dsp_r2.c",
+		"dsp/filters_mips_dsp_r2.c",
+		"dsp/upsampling_neon.c",
+		"dsp/alpha_processing_mips_dsp_r2.c",
+		"dsp/enc_mips_dsp_r2.c",
+		"dsp/lossless.c",
+		"dsp/yuv_mips_dsp_r2.c",
+		"dsp/cost_mips_dsp_r2.c",
+		"dsp/argb.c",
+		"dsp/dec_sse2.c",
+		"dsp/rescaler_sse2.c",
+		"dsp/enc_sse41.c",
+		"dsp/argb_mips_dsp_r2.c",
+		"dsp/lossless_enc_mips_dsp_r2.c",
+		"dsp/dec_clip_tables.c",
+		"dsp/yuv_mips32.c",
+		"dsp/cpu.c",
+		"dsp/dec.c",
+		"dsp/argb_sse2.c",
+		"dsp/lossless_neon.c",
+		"dsp/lossless_enc.c",
+		"dsp/enc_mips32.c",
+		"dsp/cost.c",
+		"dsp/rescaler_mips_dsp_r2.c",
+		"dsp/dec_mips_dsp_r2.c",
+		"dsp/rescaler_neon.c",
+		"dsp/yuv_sse2.c",
+		"dsp/enc_sse2.c",
+		"dsp/upsampling_sse2.c",
+	]
+	thirdparty_libwebp_sources = [thirdparty_dir + file for file in thirdparty_libwebp_sources]
+
+	env_modules.add_source_files(env.modules_sources, thirdparty_libwebp_sources)
+	env_modules.Append(CPPPATH = [thirdparty_dir])
+
+# Godot source files
+env_modules.add_source_files(env.modules_sources, "*.cpp")
+
+Export('env_modules')
+Export('env')
diff --git a/modules/webp/config.py b/modules/webp/config.py
new file mode 100644
index 0000000000..368e97e152
--- /dev/null
+++ b/modules/webp/config.py
@@ -0,0 +1,6 @@
+
+def can_build(platform):
+	return True
+
+def configure(env):
+	pass
diff --git a/modules/webp/image_loader_webp.cpp b/modules/webp/image_loader_webp.cpp
new file mode 100644
index 0000000000..0fe2db3261
--- /dev/null
+++ b/modules/webp/image_loader_webp.cpp
@@ -0,0 +1,183 @@
+/*************************************************************************/
+/*  image_loader_webp.cpp                                                */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "image_loader_webp.h"
+
+#include "io/marshalls.h"
+#include "print_string.h"
+#include "os/os.h"
+
+#include <stdlib.h>
+#include <webp/decode.h>
+#include <webp/encode.h>
+
+static DVector<uint8_t> _webp_lossy_pack(const Image& p_image,float p_quality) {
+
+	ERR_FAIL_COND_V(p_image.empty(),DVector<uint8_t>());
+
+	Image img=p_image;
+	if (img.detect_alpha())
+		img.convert(Image::FORMAT_RGBA);
+	else
+		img.convert(Image::FORMAT_RGB);
+
+	Size2 s(img.get_width(),img.get_height());
+	DVector<uint8_t> data = img.get_data();
+	DVector<uint8_t>::Read r = data.read();
+
+	uint8_t *dst_buff=NULL;
+	size_t dst_size=0;
+	if (img.get_format()==Image::FORMAT_RGB) {
+
+		dst_size = WebPEncodeRGB(r.ptr(),s.width,s.height,3*s.width,CLAMP(p_quality*100.0,0,100.0),&dst_buff);
+	} else {
+		dst_size = WebPEncodeRGBA(r.ptr(),s.width,s.height,4*s.width,CLAMP(p_quality*100.0,0,100.0),&dst_buff);
+	}
+
+	ERR_FAIL_COND_V(dst_size==0,DVector<uint8_t>());
+	DVector<uint8_t> dst;
+	dst.resize(4+dst_size);
+	DVector<uint8_t>::Write w = dst.write();
+	w[0]='W';
+	w[1]='E';
+	w[2]='B';
+	w[3]='P';
+	copymem(&w[4],dst_buff,dst_size);
+	free(dst_buff);
+	w=DVector<uint8_t>::Write();
+	return dst;
+}
+
+static Image _webp_lossy_unpack(const DVector<uint8_t>& p_buffer) {
+
+	int size = p_buffer.size()-4;
+	ERR_FAIL_COND_V(size<=0,Image());
+	DVector<uint8_t>::Read r = p_buffer.read();
+
+	ERR_FAIL_COND_V(r[0]!='W' || r[1]!='E' || r[2]!='B' || r[3]!='P',Image());
+	WebPBitstreamFeatures features;
+	if (WebPGetFeatures(&r[4],size,&features)!=VP8_STATUS_OK) {
+		ERR_EXPLAIN("Error unpacking WEBP image:");
+		ERR_FAIL_V(Image());
+	}
+
+	//print_line("width: "+itos(features.width));
+	//print_line("height: "+itos(features.height));
+	//print_line("alpha: "+itos(features.has_alpha));
+
+	DVector<uint8_t> dst_image;
+	int datasize = features.width*features.height*(features.has_alpha?4:3);
+	dst_image.resize(datasize);
+
+	DVector<uint8_t>::Write dst_w = dst_image.write();
+
+	bool errdec=false;
+	if (features.has_alpha)	 {
+		errdec = WebPDecodeRGBAInto(&r[4],size,dst_w.ptr(),datasize,4*features.width)==NULL;
+	} else {
+		errdec = WebPDecodeRGBInto(&r[4],size,dst_w.ptr(),datasize,3*features.width)==NULL;
+
+	}
+
+	//ERR_EXPLAIN("Error decoding webp! - "+p_file);
+	ERR_FAIL_COND_V(errdec,Image());
+
+	dst_w = DVector<uint8_t>::Write();
+
+	return Image(features.width,features.height,0,features.has_alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB,dst_image);
+
+}
+
+
+Error ImageLoaderWEBP::load_image(Image *p_image,FileAccess *f) {
+
+
+	uint32_t size = f->get_len();
+	DVector<uint8_t> src_image;
+	src_image.resize(size);
+
+	WebPBitstreamFeatures features;
+
+	DVector<uint8_t>::Write src_w = src_image.write();
+	f->get_buffer(src_w.ptr(),size);
+	ERR_FAIL_COND_V(f->eof_reached(), ERR_FILE_EOF);
+
+	if (WebPGetFeatures(src_w.ptr(),size,&features)!=VP8_STATUS_OK) {
+		f->close();
+		//ERR_EXPLAIN("Error decoding WEBP image: "+p_file);
+		ERR_FAIL_V(ERR_FILE_CORRUPT);
+	}
+
+	print_line("width: "+itos(features.width));
+	print_line("height: "+itos(features.height));
+	print_line("alpha: "+itos(features.has_alpha));
+
+	src_w = DVector<uint8_t>::Write();
+
+	DVector<uint8_t> dst_image;
+	int datasize = features.width*features.height*(features.has_alpha?4:3);
+	dst_image.resize(datasize);
+
+	DVector<uint8_t>::Read src_r = src_image.read();
+	DVector<uint8_t>::Write dst_w = dst_image.write();
+
+
+	bool errdec=false;
+	if (features.has_alpha)	 {
+		errdec = WebPDecodeRGBAInto(src_r.ptr(),size,dst_w.ptr(),datasize,4*features.width)==NULL;
+	} else {
+		errdec = WebPDecodeRGBInto(src_r.ptr(),size,dst_w.ptr(),datasize,3*features.width)==NULL;
+
+	}
+
+	//ERR_EXPLAIN("Error decoding webp! - "+p_file);
+	ERR_FAIL_COND_V(errdec,ERR_FILE_CORRUPT);
+
+	src_r = DVector<uint8_t>::Read();
+	dst_w = DVector<uint8_t>::Write();
+
+	*p_image = Image(features.width,features.height,0,features.has_alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB,dst_image);
+
+
+	return OK;
+
+}
+
+void ImageLoaderWEBP::get_recognized_extensions(List<String> *p_extensions) const {
+	
+	p_extensions->push_back("webp");
+}
+
+
+ImageLoaderWEBP::ImageLoaderWEBP() {
+
+	Image::lossy_packer=_webp_lossy_pack;
+	Image::lossy_unpacker=_webp_lossy_unpack;
+}
+
+
diff --git a/modules/webp/image_loader_webp.h b/modules/webp/image_loader_webp.h
new file mode 100644
index 0000000000..24f79708db
--- /dev/null
+++ b/modules/webp/image_loader_webp.h
@@ -0,0 +1,49 @@
+/*************************************************************************/
+/*  image_loader_webp.h                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef IMAGE_LOADER_WEBP_H
+#define IMAGE_LOADER_WEBP_H
+
+#include "io/image_loader.h"
+
+/**
+	@author Juan Linietsky <reduzio@gmail.com>
+*/
+class ImageLoaderWEBP : public ImageFormatLoader {
+
+
+public:
+
+	virtual Error load_image(Image *p_image,FileAccess *f);
+	virtual void get_recognized_extensions(List<String> *p_extensions) const;	
+	ImageLoaderWEBP();
+};
+
+
+
+#endif
diff --git a/modules/webp/register_types.cpp b/modules/webp/register_types.cpp
new file mode 100644
index 0000000000..039876bbb9
--- /dev/null
+++ b/modules/webp/register_types.cpp
@@ -0,0 +1,44 @@
+/*************************************************************************/
+/*  register_types.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "register_types.h"
+
+#include "image_loader_webp.h"
+
+static ImageLoaderWEBP *image_loader_webp = NULL;
+
+void register_webp_types() {
+
+	image_loader_webp = memnew( ImageLoaderWEBP );
+	ImageLoader::add_image_format_loader(image_loader_webp);
+}
+
+void unregister_webp_types() {
+
+	memdelete( image_loader_webp );
+}
diff --git a/modules/webp/register_types.h b/modules/webp/register_types.h
new file mode 100644
index 0000000000..a200188e47
--- /dev/null
+++ b/modules/webp/register_types.h
@@ -0,0 +1,30 @@
+/*************************************************************************/
+/*  register_types.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+void register_webp_types();
+void unregister_webp_types();