/* Copyright 2008 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 "rgbe.h" #include #include #include #include OIIO_PLUGIN_NAMESPACE_BEGIN class HdrOutput final : public ImageOutput { public: HdrOutput() { init(); } virtual ~HdrOutput() { close(); } virtual const char* format_name(void) const override { return "hdr"; } virtual bool open(const std::string& name, const ImageSpec& spec, OpenMode mode) 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: FILE* m_fd; std::vector scratch; std::string rgbe_error; // Buffer for RGBE library error msgs std::vector m_tilebuffer; void init(void) { m_fd = NULL; rgbe_error.clear(); } }; OIIO_PLUGIN_EXPORTS_BEGIN OIIO_EXPORT ImageOutput* hdr_output_imageio_create() { return new HdrOutput; } OIIO_EXPORT const char* hdr_output_extensions[] = { "hdr", "rgbe", nullptr }; OIIO_PLUGIN_EXPORTS_END bool HdrOutput::open(const std::string& name, const ImageSpec& newspec, OpenMode mode) { if (mode != Create) { error("%s does not support subimages or MIP levels", format_name()); return false; } // Save spec for later use m_spec = newspec; // HDR always behaves like floating point m_spec.set_format(TypeDesc::FLOAT); // Check for things HDR can't support if (m_spec.nchannels != 3) { error("HDR can only support 3-channel images"); return false; } if (m_spec.width < 1 || m_spec.height < 1) { error("Image resolution must be at least 1x1, you asked for %d x %d", m_spec.width, m_spec.height); return false; } if (m_spec.depth < 1) m_spec.depth = 1; if (m_spec.depth > 1) { error("%s does not support volume images (depth > 1)", format_name()); return false; } m_spec.set_format(TypeDesc::FLOAT); // Native rgbe is float32 only m_fd = Filesystem::fopen(name, "wb"); if (m_fd == NULL) { error("Unable to open file"); return false; } rgbe_header_info h; h.valid = 0; // Most readers seem to think that rgbe files are valid only if they // identify themselves as from "RADIANCE". h.valid |= RGBE_VALID_PROGRAMTYPE; Strutil::safe_strcpy(h.programtype, "RADIANCE", sizeof(h.programtype)); ParamValue* p; p = m_spec.find_attribute("Orientation", TypeDesc::INT); if (p) { h.valid |= RGBE_VALID_ORIENTATION; h.orientation = *(int*)p->data(); } // FIXME -- should we do anything about gamma, exposure, software, // pixaspect, primaries? (N.B. rgbe.c doesn't even handle most of them) int r = RGBE_WriteHeader(m_fd, m_spec.width, m_spec.height, &h, rgbe_error); if (r != RGBE_RETURN_SUCCESS) error("%s", rgbe_error); // If user asked for tiles -- which this format doesn't support, emulate // it by buffering the whole image. if (m_spec.tile_width && m_spec.tile_height) m_tilebuffer.resize(m_spec.image_bytes()); return true; } bool HdrOutput::write_scanline(int y, int z, TypeDesc format, const void* data, stride_t xstride) { data = to_native_scanline(format, data, xstride, scratch); int r = RGBE_WritePixels_RLE(m_fd, (float*)data, m_spec.width, 1, rgbe_error); if (r != RGBE_RETURN_SUCCESS) error("%s", rgbe_error); return (r == RGBE_RETURN_SUCCESS); } bool HdrOutput::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_tilebuffer[0]); } bool HdrOutput::close() { if (!m_fd) { // already closed init(); return true; } bool ok = true; if (m_spec.tile_width) { // We've been emulating tiles; now dump as scanlines. ASSERT(m_tilebuffer.size()); ok &= write_scanlines(m_spec.y, m_spec.y + m_spec.height, 0, m_spec.format, &m_tilebuffer[0]); std::vector().swap(m_tilebuffer); } fclose(m_fd); m_fd = NULL; init(); return ok; } OIIO_PLUGIN_NAMESPACE_END