// license:BSD-3-Clause // copyright-holders:Ryan Holtz //============================================================ // // slider.cpp - BGFX shader parameter slider // //============================================================ #include "emu.h" #include "slider.h" #include "ui/ui.h" bgfx_slider::bgfx_slider(running_machine &machine, std::string name, int32_t min, int32_t def, int32_t max, int32_t step, slider_type type, screen_type screen, float scale, std::string format, std::string description, std::vector& strings) : m_name(name) , m_step(step) , m_type(type) , m_screen_type(screen) , m_scale(scale) , m_format(format) , m_description(description) { m_min = min; m_default = def; m_max = max; m_value = def; if (m_type != slider_type::SLIDER_INT && m_type != slider_type::SLIDER_INT_ENUM) { m_value = float(def) * scale; } for (std::string string : strings) { m_strings.push_back(string); } m_slider_state = create_core_slider(machine); } bgfx_slider::~bgfx_slider() { } static INT32 update_trampoline(running_machine &machine, void *arg, std::string *str, INT32 newval) { if (arg != nullptr) { return reinterpret_cast(arg)->update(str, newval); } return 0; } slider_state* bgfx_slider::create_core_slider(running_machine& machine) { int size = sizeof(slider_state) + m_description.length(); slider_state *state = reinterpret_cast(auto_alloc_array_clear(machine, UINT8, size)); state->minval = m_min; state->defval = m_default; state->maxval = m_max; state->incval = m_step; state->update = update_trampoline; state->arg = this; state->id = 0; // fixme strcpy(state->description, m_description.c_str()); return state; } int32_t bgfx_slider::update(std::string *str, int32_t newval) { switch (m_type) { case SLIDER_INT_ENUM: { if (newval != SLIDER_NOCHANGE) { m_value = float(newval); } if (str != nullptr) { *str = string_format(m_format, m_strings[as_int()]); } return as_int(); } case SLIDER_INT: { if (newval != SLIDER_NOCHANGE) { m_value = float(newval); } if (str != nullptr) { *str = string_format(m_format, as_int()); } return as_int(); } default: { float *val_ptr = reinterpret_cast(&m_value); if (newval != SLIDER_NOCHANGE) { *val_ptr = float(newval) * m_scale; } if (str != nullptr) { *str = string_format(m_format, *val_ptr); } return int32_t(floor(*val_ptr / m_scale + 0.5f)); } } return 0; } size_t bgfx_slider::get_size_for_type(slider_type type) { switch(type) { case SLIDER_INT_ENUM: case SLIDER_FLOAT: case SLIDER_INT: return sizeof(float); case SLIDER_COLOR: return sizeof(float) * 3; case SLIDER_VEC2: return sizeof(float) * 2; default: return 0; } }