/* Copyright 2011 Larry Gritz and the other authors and contributors. All Rights Reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the software's owners nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. (This is the Modified BSD License) */ #include #include #include #include #include OIIO_PLUGIN_NAMESPACE_BEGIN namespace webp_pvt { class WebpOutput final : public ImageOutput { public: WebpOutput() { init(); } virtual ~WebpOutput() { close(); } virtual const char* format_name() const override { return "webp"; } virtual bool open(const std::string& name, const ImageSpec& spec, OpenMode mode = Create) override; virtual int supports(string_view feature) const override; virtual bool write_scanline(int y, int z, TypeDesc format, const void* data, stride_t xstride) override; virtual bool write_tile(int x, int y, int z, TypeDesc format, const void* data, stride_t xstride, stride_t ystride, stride_t zstride) override; virtual bool close() override; private: WebPPicture m_webp_picture; WebPConfig m_webp_config; std::string m_filename; FILE* m_file; int m_scanline_size; unsigned int m_dither; std::vector m_uncompressed_image; void init() { m_scanline_size = 0; m_file = NULL; } }; int WebpOutput::supports(string_view feature) const { return feature == "tiles" || feature == "alpha" || feature == "random_access" || feature == "rewrite"; } static int WebpImageWriter(const uint8_t* img_data, size_t data_size, const WebPPicture* const webp_img) { FILE* out_file = (FILE*)webp_img->custom_ptr; size_t wb = fwrite(img_data, data_size, sizeof(uint8_t), out_file); if (wb != sizeof(uint8_t)) { //FIXME Bad write occurred } return 1; } bool WebpOutput::open(const std::string& name, const ImageSpec& spec, OpenMode mode) { if (mode != Create) { error("%s does not support subimages or MIP levels", format_name()); return false; } // saving 'name' and 'spec' for later use m_filename = name; m_spec = spec; if (m_spec.nchannels != 3 && m_spec.nchannels != 4) { error("%s does not support %d-channel images\n", format_name(), m_spec.nchannels); return false; } m_file = Filesystem::fopen(m_filename, "wb"); if (!m_file) { error("Unable to open file \"%s\"", m_filename.c_str()); return false; } if (!WebPPictureInit(&m_webp_picture)) { error("Couldn't initialize WebPPicture\n"); close(); return false; } m_webp_picture.width = m_spec.width; m_webp_picture.height = m_spec.height; m_webp_picture.writer = WebpImageWriter; m_webp_picture.custom_ptr = (void*)m_file; if (!WebPConfigInit(&m_webp_config)) { error("Couldn't initialize WebPPicture\n"); close(); return false; } auto compqual = m_spec.decode_compression_metadata("webp", 100); if (Strutil::iequals(compqual.first, "webp")) { m_webp_config.method = 6; m_webp_config.quality = OIIO::clamp(compqual.second, 1, 100); } else { // If compression name wasn't "webp", don't trust the quality // metric, just use the default. m_webp_config.method = 6; m_webp_config.quality = 100; } // forcing UINT8 format m_spec.set_format(TypeDesc::UINT8); m_dither = m_spec.get_int_attribute("oiio:dither", 0); m_scanline_size = m_spec.width * m_spec.nchannels; const int image_buffer = m_spec.height * m_scanline_size; m_uncompressed_image.resize(image_buffer, 0); return true; } bool WebpOutput::write_scanline(int y, int z, TypeDesc format, const void* data, stride_t xstride) { if (y > m_spec.height) { error("Attempt to write too many scanlines to %s", m_filename.c_str()); close(); return false; } std::vector scratch; data = to_native_scanline(format, data, xstride, scratch, m_dither, y, z); memcpy(&m_uncompressed_image[y * m_scanline_size], data, m_scanline_size); if (y == m_spec.height - 1) { if (m_spec.nchannels == 4) { // WebP requires unassociated alpha, and it's sRGB. // Handle this all by wrapping an IB around it. ImageSpec specwrap(m_spec.width, m_spec.height, 4, TypeUInt8); ImageBuf bufwrap(specwrap, &m_uncompressed_image[0]); ROI rgbroi(0, m_spec.width, 0, m_spec.height, 0, 1, 0, 3); ImageBufAlgo::pow(bufwrap, bufwrap, 2.2f, rgbroi); ImageBufAlgo::unpremult(bufwrap, bufwrap); ImageBufAlgo::pow(bufwrap, bufwrap, 1.0f / 2.2f, rgbroi); WebPPictureImportRGBA(&m_webp_picture, &m_uncompressed_image[0], m_scanline_size); } else { WebPPictureImportRGB(&m_webp_picture, &m_uncompressed_image[0], m_scanline_size); } if (!WebPEncode(&m_webp_config, &m_webp_picture)) { error("Failed to encode %s as WebP image", m_filename.c_str()); close(); return false; } } return true; } bool WebpOutput::write_tile(int x, int y, int z, TypeDesc format, const void* data, stride_t xstride, stride_t ystride, stride_t zstride) { // Emulate tiles by buffering the whole image return copy_tile_to_image_buffer(x, y, z, format, data, xstride, ystride, zstride, &m_uncompressed_image[0]); } bool WebpOutput::close() { if (!m_file) return true; // already closed bool ok = true; if (m_spec.tile_width) { // We've been emulating tiles; now dump as scanlines. ASSERT(m_uncompressed_image.size()); ok &= write_scanlines(m_spec.y, m_spec.y + m_spec.height, 0, m_spec.format, &m_uncompressed_image[0]); std::vector().swap(m_uncompressed_image); } WebPPictureFree(&m_webp_picture); fclose(m_file); m_file = NULL; return true; } } // namespace webp_pvt OIIO_PLUGIN_EXPORTS_BEGIN OIIO_EXPORT ImageOutput* webp_output_imageio_create() { return new webp_pvt::WebpOutput; } OIIO_EXPORT const char* webp_output_extensions[] = { "webp", nullptr }; OIIO_PLUGIN_EXPORTS_END OIIO_PLUGIN_NAMESPACE_END