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Diffstat (limited to 'intern/cycles/render/image.cpp')
| -rw-r--r-- | intern/cycles/render/image.cpp | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/intern/cycles/render/image.cpp b/intern/cycles/render/image.cpp new file mode 100644 index 00000000000..08127cf7409 --- /dev/null +++ b/intern/cycles/render/image.cpp @@ -0,0 +1,227 @@ +/* + * Copyright 2011, Blender Foundation. + * + * 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. + */ + +#include "device.h" +#include "image.h" +#include "scene.h" + +#include "util_foreach.h" +#include "util_image.h" +#include "util_path.h" +#include "util_progress.h" + +CCL_NAMESPACE_BEGIN + +ImageManager::ImageManager() +{ + need_update = true; +} + +ImageManager::~ImageManager() +{ + for(size_t slot = 0; slot < images.size(); slot++) { + assert(!images[slot]); + } +} + +int ImageManager::add_image(const string& filename) +{ + Image *img; + size_t slot; + + /* find existing image */ + for(slot = 0; slot < images.size(); slot++) { + if(images[slot] && images[slot]->filename == filename) { + images[slot]->users++; + return slot; + } + } + + /* find free slot */ + for(slot = 0; slot < images.size(); slot++) + if(!images[slot]) + break; + + if(slot == images.size()) { + /* max images limit reached */ + if(images.size() == TEX_IMAGE_MAX) + return -1; + + images.resize(images.size() + 1); + } + + /* add new image */ + img = new Image(); + img->filename = filename; + img->need_load = true; + img->users = 1; + + images[slot] = img; + need_update = true; + + return slot; +} + +void ImageManager::remove_image(int slot) +{ + assert(images[slot]); + + /* decrement user count */ + images[slot]->users--; + assert(images[slot]->users >= 0); + + /* don't remove immediately, rather do it all together later on. one of + the reasons for this is that on shader changes we add and remove nodes + that use them, but we do not want to reload the image all the time. */ + if(images[slot]->users == 0) + need_update = true; + + /* todo: remove OSL image from cache */ +} + +bool ImageManager::file_load_image(Image *img, device_vector<uchar4>& tex_img) +{ + if(img->filename == "") + return false; + + /* load image from file through OIIO */ + ImageInput *in = ImageInput::create(img->filename); + + if(!in) + return false; + + ImageSpec spec; + + if(!in->open(img->filename, spec)) { + delete in; + return false; + } + + /* we only handle certain number of components */ + int width = spec.width; + int height = spec.height; + int components = spec.nchannels; + + if(!(components == 1 || components == 3 || components == 4)) { + delete in; + return false; + } + + /* read RGBA pixels */ + uchar *pixels = (uchar*)tex_img.resize(width, height); + int scanlinesize = width*components*sizeof(uchar); + + in->read_image(TypeDesc::UINT8, + (uchar*)pixels + (height-1)*scanlinesize, + AutoStride, + -scanlinesize, + AutoStride); + + in->close(); + + if(components == 3) { + for(int i = width*height-1; i >= 0; i--) { + pixels[i*4+3] = 255; + pixels[i*4+2] = pixels[i*3+2]; + pixels[i*4+1] = pixels[i*3+1]; + pixels[i*4+0] = pixels[i*3+0]; + } + } + else if(components == 1) { + for(int i = width*height-1; i >= 0; i--) { + pixels[i*4+3] = 255; + pixels[i*4+2] = pixels[i]; + pixels[i*4+1] = pixels[i]; + pixels[i*4+0] = pixels[i]; + } + } + + return true; +} + +void ImageManager::device_load_image(Device *device, DeviceScene *dscene, int slot) +{ + Image *img = images[slot]; + device_vector<uchar4>& tex_img = dscene->tex_image[slot]; + + img->need_load = false; + if(tex_img.device_pointer) + device->tex_free(tex_img); + + if(!file_load_image(img, tex_img)) { + /* on failure to load, we set a 1x1 pixels black image */ + uchar *pixels = (uchar*)tex_img.resize(1, 1); + + pixels[0] = 0; + pixels[1] = 0; + pixels[2] = 0; + pixels[3] = 0; + } + + string name; + + if(slot >= 10) name = string_printf("__tex_image_0%d", slot); + else name = string_printf("__tex_image_00%d", slot); + + device->tex_alloc(name.c_str(), tex_img, true, true); +} + +void ImageManager::device_free_image(Device *device, DeviceScene *dscene, int slot) +{ + if(images[slot]) { + device->tex_free(dscene->tex_image[slot]); + dscene->tex_image[slot].clear(); + + delete images[slot]; + images[slot] = NULL; + } +} + +void ImageManager::device_update(Device *device, DeviceScene *dscene, Progress& progress) +{ + if(!need_update) + return; + + for(size_t slot = 0; slot < images.size(); slot++) { + if(images[slot]) { + if(images[slot]->users == 0) { + device_free_image(device, dscene, slot); + } + else if(images[slot]->need_load) { + string name = path_filename(images[slot]->filename); + progress.set_status("Updating Images", "Loading " + name); + device_load_image(device, dscene, slot); + } + + if(progress.get_cancel()) return; + } + } + + need_update = false; +} + +void ImageManager::device_free(Device *device, DeviceScene *dscene) +{ + for(size_t slot = 0; slot < images.size(); slot++) + device_free_image(device, dscene, slot); + + images.clear(); +} + +CCL_NAMESPACE_END + |