int wall_is_doorway ( segment * seg, int side ) { int flags, type; int state; //--Covered by macro // No child. //--Covered by macro if (seg->children[side] == -1) //--Covered by macro return WID_WALL; //--Covered by macro if (seg->children[side] == -2) //--Covered by macro return WID_EXTERNAL_FLAG; //--Covered by macro // No wall present. //--Covered by macro if (seg->sides[side].wall_num == -1) //--Covered by macro return WID_NO_WALL; Assert(seg-Segments>=0 && seg-Segments<=Highest_segment_index); Assert(side>=0 && side<6); type = Walls[seg->sides[side].wall_num].type; flags = Walls[seg->sides[side].wall_num].flags; if (type == WALL_OPEN) return WID_NO_WALL; if (type == WALL_ILLUSION) { if (Walls[seg->sides[side].wall_num].flags & WALL_ILLUSION_OFF) return WID_NO_WALL; else { if (check_transparency( seg, side)) { return WID_TRANSILLUSORY_WALL; }else return WID_ILLUSORY_WALL; } } if (type == WALL_BLASTABLE) { if (flags & WALL_BLASTED) return WID_TRANSILLUSORY_WALL; if (check_transparency( seg, side)) return WID_TRANSPARENT_WALL; else return WID_WALL; } if (flags & WALL_DOOR_OPENED) return WID_TRANSILLUSORY_WALL; state = Walls[seg->sides[side].wall_num].state; if ((type == WALL_DOOR) && (state == WALL_DOOR_OPENING)) return WID_TRANSPARENT_WALL; // If none of the above flags are set, there is no doorway. if (check_transparency( seg, side)) return WID_TRANSPARENT_WALL; else return WID_WALL; // There are children behind the door. }
WALL_IS_DOORWAY_result_t wall_is_doorway(const side &side) { auto &w = *vcwallptr(side.wall_num); const auto type = w.type; if (type == WALL_OPEN) return WID_NO_WALL; #if defined(DXX_BUILD_DESCENT_II) if (unlikely(type == WALL_CLOAKED)) return WID_CLOAKED_WALL; #endif const auto flags = w.flags; if (type == WALL_ILLUSION) { if (flags & WALL_ILLUSION_OFF) return WID_NO_WALL; else { if (check_transparency(side)) return WID_TRANSILLUSORY_WALL; else return WID_ILLUSORY_WALL; } } if (type == WALL_BLASTABLE) { if (flags & WALL_BLASTED) return WID_TRANSILLUSORY_WALL; if (check_transparency(side)) return WID_TRANSPARENT_WALL; else return WID_WALL; } if (unlikely(flags & WALL_DOOR_OPENED)) return WID_TRANSILLUSORY_WALL; if (likely(type == WALL_DOOR) && unlikely(w.state == WALL_DOOR_OPENING)) return WID_TRANSPARENT_WALL; // If none of the above flags are set, there is no doorway. if (check_transparency(side)) return WID_TRANSPARENT_WALL; else return WID_WALL; // There are children behind the door. }
int png_include_image (pdf_ximage *ximage, FILE *png_file) { pdf_obj *stream; pdf_obj *stream_dict; pdf_obj *colorspace, *mask, *intent; png_bytep stream_data_ptr; int trans_type; ximage_info info; /* Libpng stuff */ png_structp png_ptr; png_infop png_info_ptr; png_byte bpc, color_type; png_uint_32 width, height, rowbytes; pdf_ximage_init_image_info(&info); stream = NULL; stream_dict = NULL; colorspace = mask = intent = NULL; rewind (png_file); png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, warn); if (png_ptr == NULL || (png_info_ptr = png_create_info_struct (png_ptr)) == NULL) { WARN("%s: Creating Libpng read/info struct failed.", PNG_DEBUG_STR); if (png_ptr) png_destroy_read_struct(&png_ptr, NULL, NULL); return -1; } #if PNG_LIBPNG_VER >= 10603 /* ignore possibly incorrect CMF bytes */ png_set_option(png_ptr, PNG_MAXIMUM_INFLATE_WINDOW, PNG_OPTION_ON); #endif /* Inititializing file IO. */ png_init_io (png_ptr, png_file); /* Read PNG info-header and get some info. */ png_read_info(png_ptr, png_info_ptr); color_type = png_get_color_type (png_ptr, png_info_ptr); width = png_get_image_width (png_ptr, png_info_ptr); height = png_get_image_height(png_ptr, png_info_ptr); bpc = png_get_bit_depth (png_ptr, png_info_ptr); /* Ask libpng to convert down to 8-bpc. */ if (bpc > 8) { if (pdf_get_version() < 5) { WARN("%s: 16-bpc PNG requires PDF version 1.5.", PNG_DEBUG_STR); png_set_strip_16(png_ptr); bpc = 8; } } /* Ask libpng to gamma-correct. * It is wrong to assume screen gamma value 2.2 but... * We do gamma correction here only when uncalibrated color space is used. */ if (!png_get_valid(png_ptr, png_info_ptr, PNG_INFO_iCCP) && !png_get_valid(png_ptr, png_info_ptr, PNG_INFO_sRGB) && !png_get_valid(png_ptr, png_info_ptr, PNG_INFO_cHRM) && png_get_valid(png_ptr, png_info_ptr, PNG_INFO_gAMA)) { double G = 1.0; png_get_gAMA (png_ptr, png_info_ptr, &G); png_set_gamma(png_ptr, 2.2, G); } trans_type = check_transparency(png_ptr, png_info_ptr); /* check_transparency() does not do updata_info() */ png_read_update_info(png_ptr, png_info_ptr); rowbytes = png_get_rowbytes(png_ptr, png_info_ptr); /* Values listed below will not be modified in the remaining process. */ info.width = width; info.height = height; info.bits_per_component = bpc; if (compat_mode) info.xdensity = info.ydensity = 72.0 / 100.0; else { png_uint_32 xppm = png_get_x_pixels_per_meter(png_ptr, png_info_ptr); png_uint_32 yppm = png_get_y_pixels_per_meter(png_ptr, png_info_ptr); if (xppm > 0) info.xdensity = 72.0 / 0.0254 / xppm; if (yppm > 0) info.ydensity = 72.0 / 0.0254 / yppm; } stream = pdf_new_stream (STREAM_COMPRESS); stream_dict = pdf_stream_dict(stream); stream_data_ptr = (png_bytep) NEW(rowbytes*height, png_byte); read_image_data(png_ptr, stream_data_ptr, height, rowbytes); /* Non-NULL intent means there is valid sRGB chunk. */ intent = get_rendering_intent(png_ptr, png_info_ptr); if (intent) pdf_add_dict(stream_dict, pdf_new_name("Intent"), intent); switch (color_type) { case PNG_COLOR_TYPE_PALETTE: colorspace = create_cspace_Indexed(png_ptr, png_info_ptr); switch (trans_type) { case PDF_TRANS_TYPE_BINARY: /* Color-key masking */ mask = create_ckey_mask(png_ptr, png_info_ptr); break; case PDF_TRANS_TYPE_ALPHA: /* Soft mask */ mask = create_soft_mask(png_ptr, png_info_ptr, stream_data_ptr, width, height); break; default: /* Nothing to be done here. * No tRNS chunk or image already composited with background color. */ break; } info.num_components = 1; break; case PNG_COLOR_TYPE_RGB: case PNG_COLOR_TYPE_RGB_ALPHA: if (png_get_valid(png_ptr, png_info_ptr, PNG_INFO_iCCP)) colorspace = create_cspace_ICCBased(png_ptr, png_info_ptr); else if (intent) { colorspace = create_cspace_sRGB(png_ptr, png_info_ptr); } else { colorspace = create_cspace_CalRGB(png_ptr, png_info_ptr); } if (!colorspace) colorspace = pdf_new_name("DeviceRGB"); switch (trans_type) { case PDF_TRANS_TYPE_BINARY: mask = create_ckey_mask(png_ptr, png_info_ptr); break; /* rowbytes changes 4 to 3 at here */ case PDF_TRANS_TYPE_ALPHA: mask = strip_soft_mask(png_ptr, png_info_ptr, stream_data_ptr, &rowbytes, width, height); break; default: mask = NULL; } info.num_components = 3; break; case PNG_COLOR_TYPE_GRAY: case PNG_COLOR_TYPE_GRAY_ALPHA: if (png_get_valid(png_ptr, png_info_ptr, PNG_INFO_iCCP)) colorspace = create_cspace_ICCBased(png_ptr, png_info_ptr); else if (intent) { colorspace = create_cspace_sRGB(png_ptr, png_info_ptr); } else { colorspace = create_cspace_CalGray(png_ptr, png_info_ptr); } if (!colorspace) colorspace = pdf_new_name("DeviceGray"); switch (trans_type) { case PDF_TRANS_TYPE_BINARY: mask = create_ckey_mask(png_ptr, png_info_ptr); break; case PDF_TRANS_TYPE_ALPHA: mask = strip_soft_mask(png_ptr, png_info_ptr, stream_data_ptr, &rowbytes, width, height); break; default: mask = NULL; } info.num_components = 1; break; default: WARN("%s: Unknown PNG colortype %d.", PNG_DEBUG_STR, color_type); } pdf_add_dict(stream_dict, pdf_new_name("ColorSpace"), colorspace); pdf_add_stream(stream, stream_data_ptr, rowbytes*height); RELEASE(stream_data_ptr); if (mask) { if (trans_type == PDF_TRANS_TYPE_BINARY) pdf_add_dict(stream_dict, pdf_new_name("Mask"), mask); else if (trans_type == PDF_TRANS_TYPE_ALPHA) { if (info.bits_per_component >= 8 && info.width > 64) { pdf_stream_set_predictor(mask, 2, info.width, info.bits_per_component, 1); } pdf_add_dict(stream_dict, pdf_new_name("SMask"), pdf_ref_obj(mask)); pdf_release_obj(mask); } else { WARN("%s: Unknown transparency type...???", PNG_DEBUG_STR); pdf_release_obj(mask); } } /* Finally read XMP Metadata * See, XMP Specification Part 3, Storage in Files * http://www.adobe.com/jp/devnet/xmp.html * * We require libpng version >= 1.6.14 since prior versions * of libpng had a bug that incorrectly treat the compression * flag of iTxt chunks. */ #if PNG_LIBPNG_VER >= 10614 if (pdf_get_version() >= 4) { png_textp text_ptr; pdf_obj *XMP_stream, *XMP_stream_dict; int i, num_text; int have_XMP = 0; num_text = png_get_text(png_ptr, png_info_ptr, &text_ptr, NULL); for (i = 0; i < num_text; i++) { if (!memcmp(text_ptr[i].key, "XML:com.adobe.xmp", 17)) { /* XMP found */ if (text_ptr[i].compression != PNG_ITXT_COMPRESSION_NONE || text_ptr[i].itxt_length == 0) WARN("%s: Invalid value(s) in iTXt chunk for XMP Metadata.", PNG_DEBUG_STR); else if (have_XMP) WARN("%s: Multiple XMP Metadata. Don't know how to treat it.", PNG_DEBUG_STR); else { /* We compress XMP metadata for included images here. * It is not recommended to compress XMP metadata for PDF documents but * we compress XMP metadata for included images here to avoid confusing * application programs that only want PDF document global XMP metadata * and scan for that. */ XMP_stream = pdf_new_stream(STREAM_COMPRESS); XMP_stream_dict = pdf_stream_dict(XMP_stream); pdf_add_dict(XMP_stream_dict, pdf_new_name("Type"), pdf_new_name("Metadata")); pdf_add_dict(XMP_stream_dict, pdf_new_name("Subtype"), pdf_new_name("XML")); pdf_add_stream(XMP_stream, text_ptr[i].text, text_ptr[i].itxt_length); pdf_add_dict(stream_dict, pdf_new_name("Metadata"), pdf_ref_obj(XMP_stream)); pdf_release_obj(XMP_stream); have_XMP = 1; } } } } #endif /* PNG_LIBPNG_VER */ png_read_end(png_ptr, NULL); /* Cleanup */ if (png_info_ptr) png_destroy_info_struct(png_ptr, &png_info_ptr); if (png_ptr) png_destroy_read_struct(&png_ptr, NULL, NULL); if (color_type != PNG_COLOR_TYPE_PALETTE && info.bits_per_component >= 8 && info.height > 64) { pdf_stream_set_predictor(stream, 15, info.width, info.bits_per_component, info.num_components); } pdf_ximage_set_image(ximage, &info, stream); return 0; }