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Diffstat (limited to 'extern/libmv/intern/image.cc')
| -rw-r--r-- | extern/libmv/intern/image.cc | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/extern/libmv/intern/image.cc b/extern/libmv/intern/image.cc new file mode 100644 index 00000000000..7e623bdbec7 --- /dev/null +++ b/extern/libmv/intern/image.cc @@ -0,0 +1,272 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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. + * + * The Original Code is Copyright (C) 2011 Blender Foundation. + * All rights reserved. + * + * Contributor(s): Blender Foundation, + * Sergey Sharybin + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#include "intern/image.h" +#include "intern/utildefines.h" +#include "libmv/tracking/track_region.h" + +#include <cassert> +#include <png.h> + +using libmv::FloatImage; +using libmv::SamplePlanarPatch; + +void libmv_floatImaheDestroy(libmv_FloatImage *image) { + delete [] image->buffer; +} + +/* Image <-> buffers conversion */ + +void libmv_byteBufferToFloatImage(const unsigned char* buffer, + int width, + int height, + int channels, + FloatImage* image) { + image->Resize(height, width, channels); + for (int y = 0, a = 0; y < height; y++) { + for (int x = 0; x < width; x++) { + for (int k = 0; k < channels; k++) { + (*image)(y, x, k) = (float)buffer[a++] / 255.0f; + } + } + } +} + +void libmv_floatBufferToFloatImage(const float* buffer, + int width, + int height, + int channels, + FloatImage* image) { + image->Resize(height, width, channels); + for (int y = 0, a = 0; y < height; y++) { + for (int x = 0; x < width; x++) { + for (int k = 0; k < channels; k++) { + (*image)(y, x, k) = buffer[a++]; + } + } + } +} + +void libmv_floatImageToFloatBuffer(const FloatImage &image, + float* buffer) { + for (int y = 0, a = 0; y < image.Height(); y++) { + for (int x = 0; x < image.Width(); x++) { + for (int k = 0; k < image.Depth(); k++) { + buffer[a++] = image(y, x, k); + } + } + } +} + +void libmv_floatImageToByteBuffer(const libmv::FloatImage &image, + unsigned char* buffer) { + for (int y = 0, a= 0; y < image.Height(); y++) { + for (int x = 0; x < image.Width(); x++) { + for (int k = 0; k < image.Depth(); k++) { + buffer[a++] = image(y, x, k) * 255.0f; + } + } + } +} + +static bool savePNGImage(png_bytep* row_pointers, + int width, + int height, + int depth, + int color_type, + const char* file_name) { + png_infop info_ptr; + png_structp png_ptr; + FILE *fp = fopen(file_name, "wb"); + + if (fp == NULL) { + return false; + } + + /* Initialize stuff */ + png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + info_ptr = png_create_info_struct(png_ptr); + + if (setjmp(png_jmpbuf(png_ptr))) { + fclose(fp); + return false; + } + + png_init_io(png_ptr, fp); + + /* Write PNG header. */ + if (setjmp(png_jmpbuf(png_ptr))) { + fclose(fp); + return false; + } + + png_set_IHDR(png_ptr, + info_ptr, + width, + height, + depth, + color_type, + PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, + PNG_FILTER_TYPE_BASE); + + png_write_info(png_ptr, info_ptr); + + /* Write bytes/ */ + if (setjmp(png_jmpbuf(png_ptr))) { + fclose(fp); + return false; + } + + png_write_image(png_ptr, row_pointers); + + /* End write/ */ + if (setjmp(png_jmpbuf(png_ptr))) { + fclose(fp); + return false; + } + + png_write_end(png_ptr, NULL); + fclose(fp); + + return true; +} + +bool libmv_saveImage(const FloatImage& image, + const char* prefix, + int x0, + int y0) { + int x, y; + png_bytep *row_pointers; + + assert(image.Depth() == 1); + + row_pointers = new png_bytep[image.Height()]; + + for (y = 0; y < image.Height(); y++) { + row_pointers[y] = new png_byte[4 * image.Width()]; + + for (x = 0; x < image.Width(); x++) { + if (x0 == x && image.Height() - y0 - 1 == y) { + row_pointers[y][x * 4 + 0] = 255; + row_pointers[y][x * 4 + 1] = 0; + row_pointers[y][x * 4 + 2] = 0; + row_pointers[y][x * 4 + 3] = 255; + } else { + float pixel = image(image.Height() - y - 1, x, 0); + row_pointers[y][x * 4 + 0] = pixel * 255; + row_pointers[y][x * 4 + 1] = pixel * 255; + row_pointers[y][x * 4 + 2] = pixel * 255; + row_pointers[y][x * 4 + 3] = 255; + } + } + } + + static int image_counter = 0; + char file_name[128]; + snprintf(file_name, sizeof(file_name), + "%s_%02d.png", + prefix, ++image_counter); + bool result = savePNGImage(row_pointers, + image.Width(), + image.Height(), + 8, + PNG_COLOR_TYPE_RGBA, + file_name); + + for (y = 0; y < image.Height(); y++) { + delete [] row_pointers[y]; + } + delete [] row_pointers; + + return result; +} + +void libmv_samplePlanarPatchFloat(const float* image, + int width, + int height, + int channels, + const double* xs, + const double* ys, + int num_samples_x, + int num_samples_y, + const float* mask, + float* patch, + double* warped_position_x, + double* warped_position_y) { + FloatImage libmv_image, libmv_patch, libmv_mask; + FloatImage *libmv_mask_for_sample = NULL; + + libmv_floatBufferToFloatImage(image, width, height, channels, &libmv_image); + + if (mask) { + libmv_floatBufferToFloatImage(mask, width, height, 1, &libmv_mask); + libmv_mask_for_sample = &libmv_mask; + } + + SamplePlanarPatch(libmv_image, + xs, ys, + num_samples_x, num_samples_y, + libmv_mask_for_sample, + &libmv_patch, + warped_position_x, + warped_position_y); + + libmv_floatImageToFloatBuffer(libmv_patch, patch); +} + + void libmv_samplePlanarPatchByte(const unsigned char* image, + int width, + int height, + int channels, + const double* xs, + const double* ys, + int num_samples_x, + int num_samples_y, + const float* mask, + unsigned char* patch, + double* warped_position_x, + double* warped_position_y) { + libmv::FloatImage libmv_image, libmv_patch, libmv_mask; + libmv::FloatImage *libmv_mask_for_sample = NULL; + + libmv_byteBufferToFloatImage(image, width, height, channels, &libmv_image); + + if (mask) { + libmv_floatBufferToFloatImage(mask, width, height, 1, &libmv_mask); + libmv_mask_for_sample = &libmv_mask; + } + + libmv::SamplePlanarPatch(libmv_image, + xs, ys, + num_samples_x, num_samples_y, + libmv_mask_for_sample, + &libmv_patch, + warped_position_x, + warped_position_y); + + libmv_floatImageToByteBuffer(libmv_patch, patch); +} |