// license:BSD-3-Clause // copyright-holders:Ryan Holtz //============================================================ // // targetreader.cpp - BGFX target JSON reader // //============================================================ #include "targetreader.h" #include "bgfxutil.h" #include "chainmanager.h" #include "target.h" #include "modules/lib/osdobj_common.h" #include const target_reader::string_to_enum target_reader::STYLE_NAMES[target_reader::STYLE_COUNT] = { { "guest", TARGET_STYLE_GUEST }, { "native", TARGET_STYLE_NATIVE }, { "custom", TARGET_STYLE_CUSTOM } }; bgfx_target* target_reader::read_from_value( const Value& value, const std::string &prefix, chain_manager& chains, uint32_t screen_index, uint16_t user_prescale, uint16_t max_prescale_size) { if (!validate_parameters(value, prefix)) { return nullptr; } std::string target_name = value["name"].GetString(); uint32_t mode = uint32_t(get_enum_from_value(value, "mode", TARGET_STYLE_NATIVE, STYLE_NAMES, STYLE_COUNT)); bool bilinear = get_bool(value, "bilinear", true); bool double_buffer = get_bool(value, "doublebuffer", true); int scale = 1; if (value.HasMember("scale")) { scale = int(floor(value["scale"].GetDouble() + 0.5)); } bool use_user_prescale = get_bool(value, "user_prescale", false); uint16_t width = 0; uint16_t height = 0; uint16_t xprescale = 1; uint16_t yprescale = 1; switch (mode) { case TARGET_STYLE_GUEST: { width = chains.targets().width(TARGET_STYLE_GUEST, screen_index); height = chains.targets().height(TARGET_STYLE_GUEST, screen_index); if (use_user_prescale) { xprescale = user_prescale; yprescale = user_prescale; bgfx_util::find_prescale_factor(width, height, max_prescale_size, xprescale, yprescale); } break; } case TARGET_STYLE_NATIVE: width = chains.targets().width(TARGET_STYLE_NATIVE, screen_index); height = chains.targets().height(TARGET_STYLE_NATIVE, screen_index); if (use_user_prescale) { xprescale = user_prescale; yprescale = user_prescale; bgfx_util::find_prescale_factor(width, height, max_prescale_size, xprescale, yprescale); } break; case TARGET_STYLE_CUSTOM: READER_WARN(!value.HasMember("user_prescale"), "%sTarget '%s': user_prescale parameter is not used for custom-type render targets.\n", prefix, target_name); if (!READER_CHECK(value.HasMember("width"), "%sTarget '%s': Must have numeric value 'width'\n", prefix, target_name)) return nullptr; if (!READER_CHECK(value["width"].IsNumber(), "%sTarget '%s': Value 'width' must be a number\n", prefix, target_name)) return nullptr; if (!READER_CHECK(value.HasMember("height"), "%sTarget '%s': Must have numeric value 'height'\n", prefix, target_name)) return nullptr; if (!READER_CHECK(value["height"].IsNumber(), "%sTarget '%s': Value 'height' must be a number\n", prefix, target_name)) return nullptr; width = uint16_t(value["width"].GetDouble()); height = uint16_t(value["height"].GetDouble()); break; } return chains.targets().create_target(std::move(target_name), bgfx::TextureFormat::BGRA8, width, height, xprescale, yprescale, mode, double_buffer, bilinear, scale, screen_index); } bool target_reader::validate_parameters(const Value& value, const std::string &prefix) { if (!READER_CHECK(value.HasMember("name"), "%sMust have string value 'name'\n", prefix)) return false; if (!READER_CHECK(value["name"].IsString(), "%sValue 'name' must be a string\n", prefix)) return false; if (!READER_CHECK(value.HasMember("mode"), "%sMust have string enum 'mode'\n", prefix)) return false; if (!READER_CHECK(value["mode"].IsString(), "%sValue 'mode' must be a string (what screens does this apply to?)\n", prefix)) return false; if (!READER_CHECK(!value.HasMember("bilinear") || value["bilinear"].IsBool(), "%sValue 'bilinear' must be a boolean\n", prefix)) return false; if (!READER_CHECK(!value.HasMember("doublebuffer") || value["doublebuffer"].IsBool(), "%sValue 'doublebuffer' must be a boolean\n", prefix)) return false; if (!READER_CHECK(!value.HasMember("user_prescale") || value["user_prescale"].IsBool(), "%sValue 'user_prescale' must be a boolean\n", prefix)) return false; if (!READER_CHECK(!value.HasMember("scale") || value["scale"].IsNumber(), "%sValue 'scale' must be a numeric value\n", prefix)) return false; return true; }