mirror of
https://github.com/holub/mame
synced 2025-10-04 16:34:53 +03:00
79 lines
3.3 KiB
C++
79 lines
3.3 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Ryan Holtz
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//============================================================
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//
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// effectreader.cpp - BGFX effect JSON reader
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//
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//============================================================
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#include <string>
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#include <bgfx/bgfx.h>
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#include "emu.h"
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#include "effect.h"
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#include "blendreader.h"
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#include "depthreader.h"
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#include "cullreader.h"
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#include "writereader.h"
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#include "shadermanager.h"
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#include "uniformreader.h"
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#include "effectreader.h"
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bgfx_effect* effect_reader::read_from_value(const Value& value, std::string prefix, shader_manager& shaders)
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{
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if (!validate_parameters(value, prefix))
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{
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return nullptr;
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}
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uint64_t blend = 0;
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if (value.HasMember("blend"))
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{
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blend = blend_reader::read_from_value(value["blend"]);
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}
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uint64_t depth = depth_reader::read_from_value(value["depth"], prefix + "depth: ");
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uint64_t cull = cull_reader::read_from_value(value["cull"]);
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uint64_t write = write_reader::read_from_value(value["write"]);
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std::vector<bgfx_uniform*> uniforms;
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const Value& uniform_array = value["uniforms"];
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for (UINT32 i = 0; i < uniform_array.Size(); i++)
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{
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uniforms.push_back(uniform_reader::read_from_value(uniform_array[i], prefix + "uniforms[" + std::to_string(i) + "]: "));
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}
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std::string vertex_name(value["vertex"].GetString());
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bgfx::ShaderHandle vertex_shader = shaders.shader(vertex_name);
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std::string fragment_name("");
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if (value.HasMember("fragment"))
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{
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fragment_name = value["fragment"].GetString();
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}
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else if (value.HasMember("pixel"))
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{
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fragment_name = value["pixel"].GetString();
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}
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bgfx::ShaderHandle fragment_shader = shaders.shader(fragment_name);
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return new bgfx_effect(blend | depth | cull | write, vertex_shader, fragment_shader, uniforms);
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}
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bool effect_reader::validate_parameters(const Value& value, std::string prefix)
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{
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if (!READER_CHECK(value.HasMember("depth"), (prefix + "Must have object value 'depth' (what are our Z-buffer settings?)\n").c_str())) return false;
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if (!READER_CHECK(value.HasMember("cull"), (prefix + "Must have object value 'cull' (do we cull triangles based on winding?)\n").c_str())) return false;
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if (!READER_CHECK(value.HasMember("write"), (prefix + "Must have object value 'write' (what are our color buffer write settings?)\n").c_str())) return false;
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if (!READER_CHECK(value.HasMember("vertex"), (prefix + "Must have string value 'vertex' (what is our vertex shader?)\n").c_str())) return false;
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if (!READER_CHECK(value["vertex"].IsString(), (prefix + "Value 'vertex' must be a string\n").c_str())) return false;
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if (!READER_CHECK(value.HasMember("fragment") || value.HasMember("pixel"), (prefix + "Must have string value named 'fragment' or 'pixel' (what is our fragment/pixel shader?)\n").c_str())) return false;
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if (!READER_CHECK(!value.HasMember("fragment") || value["fragment"].IsString(), (prefix + "Value 'fragment' must be a string\n").c_str())) return false;
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if (!READER_CHECK(!value.HasMember("pixel") || value["pixel"].IsString(), (prefix + "Value 'pixel' must be a string\n").c_str())) return false;
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if (!READER_CHECK(value.HasMember("uniforms"), (prefix + "Must have array value 'uniforms' (what are our shader's parameters?)\n").c_str())) return false;
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if (!READER_CHECK(value["uniforms"].IsArray(), (prefix + "Value 'uniforms' must be an array\n").c_str())) return false;
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return true;
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}
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