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Diffstat (limited to 'src/osd/modules/render/bgfx/sliderreader.cpp')
-rw-r--r--src/osd/modules/render/bgfx/sliderreader.cpp74
1 files changed, 74 insertions, 0 deletions
diff --git a/src/osd/modules/render/bgfx/sliderreader.cpp b/src/osd/modules/render/bgfx/sliderreader.cpp
new file mode 100644
index 00000000000..7bd2d8c59fa
--- /dev/null
+++ b/src/osd/modules/render/bgfx/sliderreader.cpp
@@ -0,0 +1,74 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+//==============================================================
+//
+// sliderreader.cpp - BGFX shader parameter slider JSON reader
+//
+//==============================================================
+
+#include "emu.h"
+
+#include "sliderreader.h"
+
+#include "slider.h"
+
+const slider_reader::string_to_enum slider_reader::TYPE_NAMES[slider_reader::TYPE_COUNT] = {
+ { "bool", uint64_t(bgfx_slider::slider_type::SLIDER_BOOL) },
+ { "float", uint64_t(bgfx_slider::slider_type::SLIDER_FLOAT) },
+ { "int", uint64_t(bgfx_slider::slider_type::SLIDER_INT) },
+ { "color", uint64_t(bgfx_slider::slider_type::SLIDER_COLOR) },
+ { "vec2", uint64_t(bgfx_slider::slider_type::SLIDER_VEC2) }
+};
+
+bgfx_slider* slider_reader::read_from_value(const Value& value)
+{
+ validate_parameters(value);
+
+ bgfx_slider::slider_type type = bgfx_slider::slider_type(get_enum_from_value(value, "type", uint64_t(bgfx_slider::slider_type::SLIDER_FLOAT), TYPE_NAMES, TYPE_COUNT));
+ std::string name = value["name"].GetString();
+ std::string description = value["text"].GetString();
+
+ float defaults[4];
+ float min[4];
+ float max[4];
+ get_values(value, "default", defaults);
+ get_values(value, "min", min);
+ get_values(value, "max", max);
+
+ return new bgfx_slider(type, name, description, defaults, min, max);
+}
+
+void slider_reader::get_values(const Value& value, std::string name, float* values)
+{
+ const char* name_str = name.c_str();
+ if (value.HasMember(name_str))
+ {
+ if (value[name_str].IsBool())
+ {
+ values[0] = value[name_str].GetBool() ? 1.0f : 0.0f;
+ }
+ else if (value[name_str].IsDouble())
+ {
+ values[0] = float(value[name_str].GetDouble());
+ }
+ else
+ {
+ const Value& value_array = value[name_str];
+ for (UINT32 i = 0; i < value_array.Size() && i < 4; i++)
+ {
+ values[i] = float(value_array[i].GetDouble());
+ }
+ }
+ }
+}
+
+void slider_reader::validate_parameters(const Value& value)
+{
+ assert(value.HasMember("type"));
+ assert(value["type"].IsString());
+ assert(value.HasMember("name"));
+ assert(value["name"].IsString());
+ assert(value.HasMember("text"));
+ assert(value["text"].IsString());
+ assert(value.HasMember("default"));
+} \ No newline at end of file