diff options
Diffstat (limited to 'crawl-ref/source/rltiles/tool/tile_page.cc')
| -rw-r--r-- | crawl-ref/source/rltiles/tool/tile_page.cc | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/crawl-ref/source/rltiles/tool/tile_page.cc b/crawl-ref/source/rltiles/tool/tile_page.cc new file mode 100644 index 0000000000..6d2aaa1883 --- /dev/null +++ b/crawl-ref/source/rltiles/tool/tile_page.cc @@ -0,0 +1,179 @@ +#include "tile_page.h" +#include "tile_colour.h" +#include "tile.h" +#include <png.h> + +static bool write_png(const char *filename, tile_colour *pixels, + int width, int height) +{ + FILE *fp = fopen(filename, "wb"); + if (!fp) + { + fprintf(stderr, "Error: Can't open file '%s' for write.\n", filename); + return false; + } + + png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, + NULL, NULL, NULL); + if (!png_ptr) + return false; + + png_infop info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) + { + png_destroy_write_struct(&png_ptr, (png_infopp)NULL); + return false; + } + + png_init_io(png_ptr, fp); + + int bit_depth = 8; + int colour_type = PNG_COLOR_TYPE_RGB_ALPHA; + int interlace_type = PNG_INTERLACE_NONE; + int compression_type = PNG_COMPRESSION_TYPE_DEFAULT; + int filter_method = PNG_FILTER_TYPE_DEFAULT; + png_set_IHDR(png_ptr, info_ptr, width, height, + bit_depth, colour_type, interlace_type, + compression_type, filter_method); + + png_bytep* row_pointers = (png_bytep*)alloca(sizeof(png_bytep) * height); + for (unsigned int y = 0; y < height; y++) + row_pointers[y] = (png_byte*)&pixels[y * width]; + + png_set_rows(png_ptr, info_ptr, row_pointers); + + int png_transforms = PNG_TRANSFORM_IDENTITY; + png_write_png(png_ptr, info_ptr, png_transforms, NULL); + png_write_end(png_ptr, info_ptr); + png_destroy_write_struct(&png_ptr, &info_ptr); + + fclose(fp); + + return true; +} + +tile_page::tile_page() : m_width(1024), m_height(0) +{ +} + +tile_page::~tile_page() +{ + for (unsigned int i = 0; i < m_tiles.size(); i++) + { + delete m_tiles[i]; + } + m_tiles.clear(); + m_counts.clear(); +} + +bool tile_page::place_images() +{ + // locate all the tiles on the page, so we can determine its size + // and the tex coords. + + m_offsets.clear(); + m_texcoords.clear(); + + int ymin, ycur, ymax; + int xmin, xcur, xmax; + ymin = ycur = ymax = xmin = xcur = xmax = 0; + + for (unsigned int i = 0; i < m_tiles.size(); i++) + { + int ofs_x, ofs_y, tilew, tileh; + if (m_tiles[i]->shrink()) + { + m_tiles[i]->get_bounding_box(ofs_x, ofs_y, tilew, tileh); + } + else + { + ofs_x = 0; + ofs_y = 0; + tilew = m_tiles[i]->width(); + tileh = m_tiles[i]->height(); + } + + m_offsets.push_back(ofs_x); + m_offsets.push_back(ofs_y); + m_offsets.push_back(m_tiles[i]->width()); + m_offsets.push_back(m_tiles[i]->height()); + + if (xcur + tilew > m_width) + { + ycur = ymin = ymax; + xcur = xmin = xmax = 0; + } + + if (tileh + ycur >= ymax) + { + if (ycur != ymin) + { + ycur = ymin; + xcur = xmax; + xmin = xmax = xcur; + } + + if (xcur + tilew > m_width) + { + ycur = ymin = ymax; + xcur = xmin = xmax = 0; + } + + if (ycur == ymin) + { + ymax = std::max(ymin + (int)tileh, ymax); + } + } + + m_height = ymax; + + m_texcoords.push_back(xcur); + m_texcoords.push_back(ycur); + m_texcoords.push_back(xcur + tilew); + m_texcoords.push_back(ycur + tileh); + + // Only add downwards, stretching out xmax as we go. + xmax = std::max(xmax, xcur + (int)tilew); + xcur = xmin; + ycur += tileh; + } + + return true; +} + +bool tile_page::write_image(const char *filename) +{ + if (m_width * m_height <= 0) + { + fprintf(stderr, "Error: failed to write image. No images placed?\n"); + return false; + } + + tile_colour *pixels = new tile_colour[m_width * m_height]; + memset(pixels, 0, m_width * m_height * sizeof(tile_colour)); + + for (unsigned int i = 0; i < m_tiles.size(); i++) + { + int sx = m_texcoords[i*4]; + int sy = m_texcoords[i*4+1]; + int ex = m_texcoords[i*4+2]; + int ey = m_texcoords[i*4+3]; + int wx = ex - sx; + int wy = ey - sy; + int ofs_x = m_offsets[i*4]; + int ofs_y = m_offsets[i*4+1]; + for (int y = 0; y < wy; y++) + { + for (int x = 0; x < wx; x++) + { + tile_colour &dest = pixels[(sx+x) + (sy+y)*m_width]; + tile_colour &src = m_tiles[i]->get_pixel(ofs_x+x, ofs_y+y); + dest = src; + } + } + } + + bool success = write_png(filename, pixels, m_width, m_height); + delete[] pixels; + return success; +} |