-bgfx: Do texture format conversion via a full-screen GPU pass. [Ryan Holtz]

bgfx/effects/misc/blit_palette16.json

@@ -0,0 +1,123 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+//============================================================
+//
+//  blit_palette16.json: A palettized texture-to-target copy.
+//
+//============================================================
+{
+	// blend (required): The blend state for this effect.
+    "blend": {
+    	// equation (optional): What equation to perform on the source and destination blend values.
+    	// values: "add", "sub", "revSub", "min", "max"
+    	// default: "add"
+    	// 
+    	// "subtract" and "revSubtract" are provided as aliases for "sub" and "revSub"
+    	"equation": "add",
+    	
+    	// blend function parameters (optional): What factors to use in the blend function when calculating the final pixel.
+    	// values: "0", "1", "srccolor", "1-srccolor", "dstcolor", "1-dstcolor", "srcalpha", "1-srcalpha", "dstalpha", "1-dstalpha"
+    	// defaults (srcColor, srcAlpha): "1"
+    	// defaults (dstColor, dstAlpha): "0"
+    	// 
+    	// "zero", "one", "invsrccolor", "invdstcolor", "invsrcalpha", and "invdstalpha" are provided as aliases for "0", "1", "1-srccolor", "1-dstcolor", "1-srcalpha", and "1-dstalpha"
+    	"srcColor": "srcalpha",
+    	"dstColor": "1-srcalpha",
+    	"srcAlpha": "srcalpha",
+    	"dstAlpha": "1-srcalpha"
+    },
+    
+    // depth (required): The depth state for this effect.
+    "depth": {
+    	// function (optional): The depth function to use when drawing.
+    	// values: "never", "less", "equal", "lequal", "greater", "notequal", "gequal", "always"
+    	// default: "always"
+    	"function": "always",
+    	
+    	// writeenable (optional): Whether to store Z-buffer data.
+    	// values: true, false
+    	// default: false
+    	"writeenable": false
+    },
+    
+    // cull (required): The cull mode for this effect.
+    "cull": {
+    	// mode (optional): What winding, if any, to cull.
+    	// values: "none", "cw", "ccw"
+    	// default: "ccw"
+    	// 
+    	// "clockwise" and "counterclockwise" are provided as aliases for "cw" and "ccw"
+    	"mode": "none"
+    },
+    
+    // write (required): Write enable for color and alpha channels.
+    "write": {
+    	// rgb (optional): Whether to store color data when drawing.
+    	// values: true, false
+    	// default: false
+    	"rgb": true,
+
+    	// alpha (optional): Whether to store alpha data when drawing.
+    	// values: true, false
+    	// default: false
+    	"alpha": true
+    },
+
+	// vertex (required): The vertex shader to use when drawing.
+	// value: A string containing the path and name of a shader file to use, minus the extension.
+    "vertex": "chains/misc/vs_blit",
+
+	// pixel/fragment (required): The pixel or fragment shader to use when drawing.
+	// value: A string containing the path and name of a shader file to use, minus the extension.
+    "fragment": "chains/misc/fs_blit_palette16",
+    
+    // uniforms (required): The list of uniforms for this effect. Can be empty, but must exist.
+    "uniforms": [    	
+    	{
+    		// name (required): The name of the uniform, as used in either the vertex or pixel/fragment shader.
+    		// value: A string containing the name of the uniform as described above.
+    		// 
+    		// NOTE: Some names correspond to special values that will be automatically filled by the BGFX
+    		//       code if they are used by the shader. These names are:
+    		//           "u_screen_dims"
+    		//				The dimensions of the first texture input if present, otherwise the dimensions of the output window.
+    		//				Valid values: xy
+    		//           "u_inv_screen_dims"
+    		//				The reciprocal of u_screen_dims.
+    		//				Valid values: xy
+    		//           "u_source_dims"
+    		//				The size, in pixels, of the screen texture incoming to the chain.
+    		//				Valid values: xy
+    		//           "u_rotation_type"
+    		//				This screen's rotation type. 0 if ROT0, 1 if ROT90, 2 if ROT180, 3 of ROT270.
+    		//              Valid values: x
+    		//           "u_swap_xy"
+    		//				Whether this screen is swapped on the X and Y axes. 1 if true, 0 if false.
+    		//				Valid values: x
+    		//			 "u_quad_dims"
+    		//				The dimensions, in pixels, occupied by this one screen primitive itself in the output window.
+    		//				Valid values: xy
+    		//			 "u_tex_sizeN"
+    		//				The dimensions, in pixels, of the texture in input pair N. Starts at 0.
+    		//				valid values: xy
+    		"name": "s_tex",
+
+    		// type (required): The type of the uniform.
+    		// values: "int", "vec4", "mat3", "mat4"
+    		//
+    		// Note: "int" should only be used for samplers.
+    		"type": "int",
+    		
+    		// values (required): The array of numbers with which to initialize the uniform.
+    		// value: A JSON array containin the correct amount of numbers to initialize a uniform of the
+    		//        above-specified type. The following size rules should be followed:
+    		//            "int": 1 float
+    		//            "vec4": 4 floats
+    		//            "mat3": 9 floats
+    		//            "mat4": 16 floats
+    		"values": [ 1.0 ]
+    	},
+    	{ "name": "s_pal", "type": "int", "values": [ 1.0 ] },
+    	{ "name": "u_inv_tex_size1", "type": "vec4", "values": [ 1.0, 1.0, 0.0, 0.0 ] }
+    ]
+}

bgfx/effects/misc/texconv_palette16.json

@@ -0,0 +1,26 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+//===============================================================
+//
+//  texconv_palette16.json: A palettized texture-to-target copy.
+//
+//===============================================================
+{
+    "blend": {
+    	"equation": "add",
+    	"srcColor": "srcalpha",
+    	"dstColor": "1-srcalpha",
+    	"srcAlpha": "srcalpha",
+    	"dstAlpha": "1-srcalpha"
+    },
+    "depth": { "function": "always", "writeenable": false },
+    "cull": { "mode": "none" },    
+    "write": { "rgb": true, "alpha": true },
+    "vertex": "chains/misc/vs_blit",
+    "fragment": "chains/misc/fs_blit_palette16",
+    "uniforms": [    	
+    	{ "name": "s_tex", "type": "int", "values": [ 1.0 ] },
+    	{ "name": "s_pal", "type": "int", "values": [ 1.0 ] },
+    	{ "name": "u_inv_tex_size1", "type": "vec4", "values": [ 1.0, 1.0, 0.0, 0.0 ] }
+    ]
+}

bgfx/effects/misc/texconv_rgb32.json

@@ -0,0 +1,25 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+//===============================================================
+//
+//  texconv_rgb32.json: An opaque texture-to-target copy.
+//
+//===============================================================
+{
+    "blend": {
+    	"equation": "add",
+    	"srcColor": "srcalpha",
+    	"dstColor": "1-srcalpha",
+    	"srcAlpha": "srcalpha",
+    	"dstAlpha": "1-srcalpha"
+    },
+    "depth": { "function": "always", "writeenable": false },
+    "cull": { "mode": "none" },    
+    "write": { "rgb": true, "alpha": true },
+    "vertex": "chains/misc/vs_blit",
+    "fragment": "chains/misc/fs_blit_rgb32",
+    "uniforms": [    	
+    	{ "name": "s_tex", "type": "int", "values": [ 1.0 ] },
+    	{ "name": "s_pal", "type": "int", "values": [ 1.0 ] }
+    ]
+}

bgfx/effects/misc/texconv_yuy16.json

@@ -0,0 +1,27 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+//===============================================================
+//
+//  texconv_yuy16.json: An opaque texture-to-target copy with
+//  YUY16 conversion.
+//
+//===============================================================
+{
+    "blend": {
+    	"equation": "add",
+    	"srcColor": "srcalpha",
+    	"dstColor": "1-srcalpha",
+    	"srcAlpha": "srcalpha",
+    	"dstAlpha": "1-srcalpha"
+    },
+    "depth": { "function": "always", "writeenable": false },
+    "cull": { "mode": "none" },    
+    "write": { "rgb": true, "alpha": true },
+    "vertex": "chains/misc/vs_blit",
+    "fragment": "chains/misc/fs_blit_yuy16",
+    "uniforms": [    	
+    	{ "name": "s_tex", "type": "int", "values": [ 1.0 ] },
+    	{ "name": "u_tex_size0", "type": "vec4", "values": [ 1.0, 1.0, 0.0, 0.0 ] },
+    	{ "name": "u_inv_tex_size0", "type": "vec4", "values": [ 1.0, 1.0, 0.0, 0.0 ] }
+    ]
+}

src/emu/render.cpp

@@ -496,7 +496,7 @@ void render_texture::get_scaled(u32 dwidth, u32 dheight, render_texinfo &texinfo
 //  palette for a texture
 //-------------------------------------------------
 
-const rgb_t *render_texture::get_adjusted_palette(render_container &container)
+const rgb_t *render_texture::get_adjusted_palette(render_container &container, u32 &out_length)
 {
 	// override the palette with our adjusted palette
 	switch (m_format)
@@ -506,7 +506,7 @@ const rgb_t *render_texture::get_adjusted_palette(render_container &container)
 			assert(m_bitmap->palette() != nullptr);
 
 			// return our adjusted palette
-			return container.bcg_lookup_table(m_format, m_bitmap->palette());
+			return container.bcg_lookup_table(m_format, out_length, m_bitmap->palette());
 
 		case TEXFORMAT_RGB32:
 		case TEXFORMAT_ARGB32:
@@ -515,7 +515,7 @@ const rgb_t *render_texture::get_adjusted_palette(render_container &container)
 			// if no adjustment necessary, return nullptr
 			if (!container.has_brightness_contrast_gamma_changes())
 				return nullptr;
-			return container.bcg_lookup_table(m_format);
+			return container.bcg_lookup_table(m_format, out_length);
 
 		default:
 			assert(false);
@@ -679,7 +679,7 @@ float render_container::apply_brightness_contrast_gamma_fp(float value)
 //  given texture mode
 //-------------------------------------------------
 
-const rgb_t *render_container::bcg_lookup_table(int texformat, palette_t *palette)
+const rgb_t *render_container::bcg_lookup_table(int texformat, u32 &out_length, palette_t *palette)
 {
 	switch (texformat)
 	{
@@ -691,14 +691,17 @@ const rgb_t *render_container::bcg_lookup_table(int texformat, palette_t *palett
 				recompute_lookups();
 			}
 			assert (palette == &m_palclient->palette());
+			out_length = palette->max_index();
 			return &m_bcglookup[0];
 
 		case TEXFORMAT_RGB32:
 		case TEXFORMAT_ARGB32:
 		case TEXFORMAT_YUY16:
+			out_length = 256;
 			return m_bcglookup256;
 
 		default:
+			out_length = 0;
 			return nullptr;
 	}
 }
@@ -2267,7 +2270,7 @@ void render_target::add_container_primitives(render_primitive_list &list, const
 					curitem.texture()->get_scaled(width, height, prim->texture, list, curitem.flags());
 
 					// set the palette
-					prim->texture.palette = curitem.texture()->get_adjusted_palette(container);
+					prim->texture.palette = curitem.texture()->get_adjusted_palette(container, prim->texture.palette_length);
 
 					// determine UV coordinates
 					prim->texcoords = oriented_texcoords[finalorient];

src/emu/render.h

@@ -218,6 +218,7 @@ struct render_texinfo
 	u64                 unique_id;          // unique identifier to pass to osd
 	u64                 old_id;             // previously allocated id, if applicable
 	const rgb_t *       palette;            // palette for PALETTE16 textures, bcg lookup table for RGB32/YUY16
+	u32					palette_length;
 };
 
 
@@ -436,7 +437,7 @@ public:
 private:
 	// internal helpers
 	void get_scaled(u32 dwidth, u32 dheight, render_texinfo &texinfo, render_primitive_list &primlist, u32 flags = 0);
-	const rgb_t *get_adjusted_palette(render_container &container);
+	const rgb_t *get_adjusted_palette(render_container &container, u32 &out_length);
 
 	static const int MAX_TEXTURE_SCALES = 16;
 
@@ -527,7 +528,7 @@ public:
 	bool has_brightness_contrast_gamma_changes() const { return (m_user.m_brightness != 1.0f || m_user.m_contrast != 1.0f || m_user.m_gamma != 1.0f); }
 	u8 apply_brightness_contrast_gamma(u8 value);
 	float apply_brightness_contrast_gamma_fp(float value);
-	const rgb_t *bcg_lookup_table(int texformat, palette_t *palette = nullptr);
+	const rgb_t *bcg_lookup_table(int texformat, u32 &out_length, palette_t *palette = nullptr);
 
 private:
 	// an item describes a high level primitive that is added to a container

src/osd/modules/render/bgfx/chain.cpp

@@ -13,11 +13,14 @@
 #include "slider.h"
 #include "parameter.h"
 #include "entryuniform.h"
+#include "valueuniform.h"
 #include "texturemanager.h"
 #include "targetmanager.h"
+#include "chainmanager.h"
 #include "target.h"
 #include "vertex.h"
 #include "screen.h"
+#include "clear.h"
 #include "modules/osdwindow.h"
 
 #include "chain.h"
@@ -33,6 +36,7 @@ bgfx_chain::bgfx_chain(std::string name, std::string author, bool transform, tar
 	, m_target_list(target_list)
 	, m_current_time(0)
 	, m_screen_index(screen_index)
+	, m_has_converter(false)
 {
 	for (bgfx_target* target : m_target_list)
 	{
@@ -138,3 +142,31 @@ uint32_t bgfx_chain::applicable_passes()
 
 	return applicable_passes;
 }
+
+void bgfx_chain::prepend_converter(bgfx_effect *effect, chain_manager &chains)
+{
+	clear_state *clear = new clear_state(BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH | BGFX_CLEAR_STENCIL, 0, 1.0f, 0);
+	std::vector<bgfx_suppressor*> suppressors;
+
+	std::vector<bgfx_input_pair*> inputs;
+	std::vector<std::string> available_textures;
+	inputs.push_back(new bgfx_input_pair(0, "s_tex", "source",  available_textures, "", chains, m_screen_index));
+	inputs.push_back(new bgfx_input_pair(1, "s_pal", "palette", available_textures, "", chains, m_screen_index));
+
+	std::vector<bgfx_entry_uniform*> uniforms;
+	float value = 1.0f;
+	float values[4] = { 1.0f, 1.0f, 0.0f, 0.0f };
+	uniforms.push_back(new bgfx_value_uniform(new bgfx_uniform("s_tex", bgfx::UniformType::Sampler), &value, 1));
+	uniforms.push_back(new bgfx_value_uniform(new bgfx_uniform("s_pal", bgfx::UniformType::Sampler), &value, 1));
+	uniforms.push_back(new bgfx_value_uniform(new bgfx_uniform("u_tex_size0", bgfx::UniformType::Vec4), values, 4));
+	uniforms.push_back(new bgfx_value_uniform(new bgfx_uniform("u_tex_size1", bgfx::UniformType::Vec4), values, 4));
+	uniforms.push_back(new bgfx_value_uniform(new bgfx_uniform("u_inv_tex_size0", bgfx::UniformType::Vec4), values, 4));
+	uniforms.push_back(new bgfx_value_uniform(new bgfx_uniform("u_inv_tex_size1", bgfx::UniformType::Vec4), values, 4));
+
+	m_entries.insert(m_entries.begin(), new bgfx_chain_entry("XXconvert", effect, clear, suppressors, inputs, uniforms, m_targets, "screen"));
+	m_has_converter = true;
+
+	const uint32_t screen_width = chains.targets().width(TARGET_STYLE_GUEST, m_screen_index);
+	const uint32_t screen_height = chains.targets().height(TARGET_STYLE_GUEST, m_screen_index);
+	m_targets.create_target("screen", bgfx::TextureFormat::RGBA8, screen_width, screen_height, TARGET_STYLE_GUEST, true, false, 1, m_screen_index);
+}

src/osd/modules/render/bgfx/chain.h

@@ -38,7 +38,10 @@ public:
 	std::vector<bgfx_slider*>& sliders() { return m_sliders; }
 	std::vector<bgfx_chain_entry*>& entries() { return m_entries; }
 	uint32_t applicable_passes();
-	bool transform() { return m_transform; }
+	bool transform() const { return m_transform; }
+	bool has_converter() const { return m_has_converter; }
+
+	void prepend_converter(bgfx_effect *effect, chain_manager &chains);
 
 private:
 	std::string                         m_name;
@@ -53,6 +56,7 @@ private:
 	std::map<std::string, bgfx_target*> m_target_map;
 	int64_t                             m_current_time;
 	uint32_t                            m_screen_index;
+	bool								m_has_converter;
 };
 
 #endif // __DRAWBGFX_CHAIN__

src/osd/modules/render/bgfx/chainentry.h

@@ -11,8 +11,8 @@
 
 #pragma once
 
-#ifndef __DRAWBGFX_CHAIN_ENTRY__
-#define __DRAWBGFX_CHAIN_ENTRY__
+#ifndef DRAWBGFX_CHAIN_ENTRY
+#define DRAWBGFX_CHAIN_ENTRY
 
 #include <bgfx/bgfx.h>
 

src/osd/modules/render/bgfx/chainentryreader.cpp

@@ -84,7 +84,7 @@ bgfx_chain_entry* chain_entry_reader::read_from_value(const Value& value, std::s
 					texture_name = chains.options().value(option.c_str());
 				}
 
-				if (texture_name != "" && texture_name != "screen")
+				if (texture_name != "" && texture_name != "screen" && texture_name != "palette")
 				{
 					if (selection == "")
 					{

src/osd/modules/render/bgfx/chainmanager.cpp

@@ -49,6 +49,7 @@ chain_manager::chain_manager(running_machine& machine, osd_options& options, tex
 {
 	refresh_available_chains();
 	parse_chain_selections(options.bgfx_screen_chains());
+	init_texture_converters();
 }
 
 chain_manager::~chain_manager()
@@ -56,6 +57,15 @@ chain_manager::~chain_manager()
 	destroy_chains();
 }
 
+void chain_manager::init_texture_converters()
+{
+	m_converters.push_back(nullptr);
+	m_converters.push_back(m_effects.effect("misc/texconv_palette16"));
+	m_converters.push_back(m_effects.effect("misc/texconv_rgb32"));
+	m_converters.push_back(nullptr);
+	m_converters.push_back(m_effects.effect("misc/texconv_yuy16"));
+}
+
 void chain_manager::refresh_available_chains()
 {
 	m_available_chains.clear();
@@ -288,17 +298,73 @@ bgfx_chain* chain_manager::screen_chain(uint32_t screen)
 	}
 }
 
-void chain_manager::process_screen_quad(uint32_t view, uint32_t screen, render_primitive* prim, osd_window &window)
+void chain_manager::process_screen_quad(uint32_t view, uint32_t screen, render_primitive* prim, osd_window& window)
 {
-	uint16_t tex_width(prim->texture.width);
-	uint16_t tex_height(prim->texture.height);
+    uint16_t tex_width(prim->texture.width);
+    uint16_t tex_height(prim->texture.height);
 
-	const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(prim->flags & PRIMFLAG_TEXFORMAT_MASK,
-		tex_width, tex_height, prim->texture.rowpixels, prim->texture.palette, prim->texture.base);
+    bgfx_texture* texture = screen < m_screen_textures.size() ? m_screen_textures[screen] : nullptr;
+    bgfx_texture* palette = screen < m_screen_palettes.size() ? m_screen_palettes[screen] : nullptr;
 
-	std::string full_name = "screen" + std::to_string(screen);
-	bgfx_texture *texture = new bgfx_texture(full_name, bgfx::TextureFormat::RGBA8, tex_width, tex_height, mem, BGFX_SAMPLER_U_CLAMP | BGFX_SAMPLER_V_CLAMP | BGFX_SAMPLER_MIN_POINT | BGFX_SAMPLER_MAG_POINT | BGFX_SAMPLER_MIP_POINT);
-	m_textures.add_provider(full_name, texture);
+	const uint32_t src_format = (prim->flags & PRIMFLAG_TEXFORMAT_MASK) >> PRIMFLAG_TEXFORMAT_SHIFT;
+	const bool needs_conversion = m_converters[src_format] != nullptr;
+	std::string screen_index = std::to_string(screen);
+	std::string source_name = "source" + screen_index;
+	std::string screen_name = "screen" + screen_index;
+	std::string palette_name = "palette" + screen_index;
+	std::string full_name = needs_conversion ? source_name : screen_name;
+	if (texture && (texture->width() != tex_width || texture->height() != tex_height))
+	{
+		m_textures.add_provider(full_name, nullptr);
+		delete texture;
+		texture = nullptr;
+
+		if (palette)
+		{
+			m_textures.add_provider(palette_name, nullptr);
+			delete palette;
+			palette = nullptr;
+		}
+	}
+
+	bgfx::TextureFormat::Enum dst_format = bgfx::TextureFormat::RGBA8;
+	uint16_t pitch = tex_width;
+	const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(dst_format, prim->flags & PRIMFLAG_TEXFORMAT_MASK,
+		tex_width, tex_height, prim->texture.rowpixels, prim->texture.palette, prim->texture.base, &pitch);
+
+	if (texture == nullptr)
+	{
+		bgfx_texture *texture = new bgfx_texture(full_name, dst_format, tex_width, tex_height, mem, BGFX_SAMPLER_U_CLAMP | BGFX_SAMPLER_V_CLAMP | BGFX_SAMPLER_MIN_POINT | BGFX_SAMPLER_MAG_POINT | BGFX_SAMPLER_MIP_POINT, pitch);
+		m_textures.add_provider(full_name, texture);
+
+		if (prim->texture.palette)
+		{
+			uint16_t palette_width = (uint16_t)std::min(prim->texture.palette_length, 256U);
+			uint16_t palette_height = (uint16_t)std::max(prim->texture.palette_length / 256, 1U);
+			const bgfx::Memory *palmem = bgfx::copy(prim->texture.palette, palette_width * palette_height * 4);
+			palette = new bgfx_texture(palette_name, bgfx::TextureFormat::BGRA8, palette_width, palette_height, palmem, BGFX_SAMPLER_U_CLAMP | BGFX_SAMPLER_V_CLAMP | BGFX_SAMPLER_MIN_POINT | BGFX_SAMPLER_MAG_POINT | BGFX_SAMPLER_MIP_POINT, palette_width);
+			m_textures.add_provider(palette_name, palette);
+		}
+
+		if (screen >= m_screen_textures.size())
+		{
+			m_screen_textures.push_back(texture);
+			if (palette)
+			{
+				m_screen_palettes.push_back(palette);
+			}
+		}
+	}
+	else
+	{
+		texture->update(mem, pitch);
+
+		if (prim->texture.palette)
+		{
+			const bgfx::Memory *palmem = bgfx::copy(prim->texture.palette, palette->width() * palette->height() * 4);
+			palette->update(palmem);
+		}
+	}
 
 	const bool any_targets_rebuilt = m_targets.update_target_sizes(screen, tex_width, tex_height, TARGET_STYLE_GUEST);
 	if (any_targets_rebuilt)
@@ -313,11 +379,12 @@ void chain_manager::process_screen_quad(uint32_t view, uint32_t screen, render_p
 	}
 
 	bgfx_chain* chain = screen_chain(screen);
+	if (needs_conversion && !chain->has_converter())
+	{
+		chain->prepend_converter(m_converters[src_format], *this);
+	}
 	chain->process(prim, view, screen, m_textures, window, bgfx_util::get_blend_state(PRIMFLAG_GET_BLENDMODE(prim->flags)));
 	view += chain->applicable_passes();
-
-	m_textures.add_provider(full_name, nullptr);
-	delete texture;
 }
 
 std::vector<render_primitive*> chain_manager::count_screens(render_primitive* prim)

src/osd/modules/render/bgfx/chainmanager.h

@@ -77,6 +77,8 @@ private:
 	void destroy_chains();
 	void reload_chains();
 
+	void init_texture_converters();
+
 	void refresh_available_chains();
 	void destroy_unloaded_chains();
 	void find_available_chains(std::string root, std::string path);
@@ -106,6 +108,9 @@ private:
 	std::vector<ui::menu_item>  m_selection_sliders;
 	std::vector<std::unique_ptr<slider_state>> m_core_sliders;
 	std::vector<int32_t>        m_current_chain;
+	std::vector<bgfx_texture*>	m_screen_textures;
+	std::vector<bgfx_texture*>	m_screen_palettes;
+	std::vector<bgfx_effect*>   m_converters;
 
 	static const uint32_t       CHAIN_NONE;
 };

src/osd/modules/render/bgfx/effect.cpp

@@ -52,11 +52,5 @@ void bgfx_effect::submit(int view, uint64_t blend)
 bgfx_uniform* bgfx_effect::uniform(std::string name)
 {
 	std::map<std::string, bgfx_uniform*>::iterator iter = m_uniforms.find(name);
-
-	if (iter != m_uniforms.end())
-	{
-		return iter->second;
-	}
-
-	return nullptr;
+	return iter != m_uniforms.end() ? iter->second : nullptr;
 }

src/osd/modules/render/bgfx/entryuniform.h

@@ -11,8 +11,8 @@
 
 #pragma once
 
-#ifndef __DRAWBGFX_ENTRY_UNIFORM__
-#define __DRAWBGFX_ENTRY_UNIFORM__
+#ifndef DRAWBGFX_ENTRY_UNIFORM
+#define DRAWBGFX_ENTRY_UNIFORM
 
 #include <bgfx/bgfx.h>
 

src/osd/modules/render/bgfx/inputpair.cpp

@@ -50,13 +50,23 @@ void bgfx_input_pair::bind(bgfx_effect *effect, const int32_t screen) const
 	std::string name = m_texture + std::to_string(screen);
 
 	bgfx_texture_handle_provider* provider = chains().textures().provider(name);
-	bgfx_uniform *tex_size = effect->uniform("u_tex_size" + std::to_string(m_index));
-	if (tex_size != nullptr)
+    if (!provider)
+        return;
+
+    bgfx_uniform *tex_size = effect->uniform("u_tex_size" + std::to_string(m_index));
+	if (tex_size && provider)
 	{
 		float values[2] = { float(provider->width()), float(provider->height()) };
 		tex_size->set(values, sizeof(float) * 2);
 	}
 
+	bgfx_uniform *inv_tex_size = effect->uniform("u_inv_tex_size" + std::to_string(m_index));
+	if (inv_tex_size && provider)
+	{
+		float values[2] = { 1.0f / float(provider->width()), 1.0f / float(provider->height()) };
+		inv_tex_size->set(values, sizeof(float) * 2);
+	}
+
 	bgfx::setTexture(m_index, effect->uniform(m_sampler)->handle(), chains().textures().handle(name));
 }
 

src/osd/modules/render/bgfx/shaders/chains/misc/fs_blit_palette16.sc

@@ -0,0 +1,19 @@
+$input v_color0, v_texcoord0
+
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+
+#include "common.sh"
+
+// Samplers
+SAMPLER2D(s_tex, 0);
+SAMPLER2D(s_pal, 1);
+
+uniform vec4 u_inv_tex_size1;
+
+void main()
+{
+	vec2 palette_uv = texture2D(s_tex,  v_texcoord0).rg;
+	palette_uv.xy = (palette_uv.xy * vec2(256.0, 256.0)) * u_inv_tex_size1.xy;
+	gl_FragColor = vec4(texture2D(s_pal, palette_uv).rgb, 1.0) * v_color0;
+}

src/osd/modules/render/bgfx/shaders/chains/misc/fs_blit_rgb32.sc

@@ -0,0 +1,14 @@
+$input v_color0, v_texcoord0
+
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+
+#include "common.sh"
+
+// Samplers
+SAMPLER2D(s_tex, 0);
+
+void main()
+{
+	gl_FragColor = vec4(texture2D(s_tex,  v_texcoord0).rgb, 1.0) * v_color0;
+}

src/osd/modules/render/bgfx/shaders/chains/misc/fs_blit_yuy16.sc

@@ -0,0 +1,37 @@
+$input v_color0, v_texcoord0
+
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz
+
+#include "common.sh"
+
+// Samplers
+SAMPLER2D(s_tex, 0);
+
+vec4 u_tex_size0;
+vec4 u_inv_tex_size0;
+
+vec3 ycc_to_rgb(float y, float cb, float cr)
+{
+	float r = saturate(y + 1.40200 * (cr - 0.5));
+	float g = saturate(y - 0.34414 * (cb - 0.5) - 0.71414 * (cr - 0.5));
+	float b = saturate(y + 1.77200 * (cb - 0.5));
+	return vec3(r, g, b);
+}
+
+void main()
+{
+	vec2 size_minus_one = u_tex_size0.xy - vec2(1.0, 1.0);
+	vec2 original_uv = round(v_texcoord0.xy * size_minus_one);
+	float mod_val = mod(original_uv.x, 2.0);
+	vec2 rounded_uv = round(vec2(original_uv.x - mod_val, original_uv.y));
+	vec2 next_uv = rounded_uv + vec2(1.0, 0.0);
+	vec2 srcpix0 = texture2D(s_tex, rounded_uv / size_minus_one).rg;
+	vec2 srcpix1 = texture2D(s_tex, next_uv / size_minus_one).rg;
+	float cr = srcpix1.r;
+	float cb = srcpix0.r;
+	if (mod_val < 1.0)
+		gl_FragColor = vec4(ycc_to_rgb(srcpix0.g, cb, cr), 1.0) * v_color0;
+	else
+		gl_FragColor = vec4(ycc_to_rgb(srcpix1.g, cb, cr), 1.0) * v_color0;
+}

src/osd/modules/render/bgfx/suppressorreader.cpp

@@ -77,6 +77,7 @@ bgfx_suppressor* suppressor_reader::read_from_value(const Value& value, std::str
 
 bool suppressor_reader::validate_parameters(const Value& value, std::string prefix)
 {
+	if (!READER_CHECK(value["type"].IsString(), (prefix + "Value 'type' must be a string\n").c_str())) return false;
 	if (!READER_CHECK(value.HasMember("name"), (prefix + "Must have string value 'name'\n").c_str())) return false;
 	if (!READER_CHECK(value["name"].IsString(), (prefix + "Value 'name' must be a string\n").c_str())) return false;
 	if (!READER_CHECK(value.HasMember("value"), (prefix + "Must have numeric or array value 'value'\n").c_str())) return false;

src/osd/modules/render/bgfx/texture.cpp

@@ -32,7 +32,7 @@ bgfx_texture::bgfx_texture(std::string name, bgfx::TextureFormat::Enum format, u
 	}
 }
 
-bgfx_texture::bgfx_texture(std::string name, bgfx::TextureFormat::Enum format, uint16_t width, uint16_t height, const bgfx::Memory* data, uint32_t flags)
+bgfx_texture::bgfx_texture(std::string name, bgfx::TextureFormat::Enum format, uint16_t width, uint16_t height, const bgfx::Memory* data, uint32_t flags, uint16_t pitch)
 	: m_name(name)
 	, m_format(format)
 	, m_width(width)
@@ -40,10 +40,16 @@ bgfx_texture::bgfx_texture(std::string name, bgfx::TextureFormat::Enum format, u
 {
 	bgfx::TextureInfo info;
 	bgfx::calcTextureSize(info, width, height, 1, false, false, 1, format);
-	m_texture = bgfx::createTexture2D(width, height, false, 1, format, flags, data);
+	m_texture = bgfx::createTexture2D(width, height, false, 1, format, flags, nullptr);
+	bgfx::updateTexture2D(m_texture, 0, 0, 0, 0, width, height, data, pitch);
 }
 
 bgfx_texture::~bgfx_texture()
 {
 	bgfx::destroy(m_texture);
 }
+
+void bgfx_texture::update(const bgfx::Memory *data, uint16_t pitch)
+{
+	bgfx::updateTexture2D(m_texture, 0, 0, 0, 0, m_width, m_height, data, pitch);
+}

src/osd/modules/render/bgfx/texture.h

@@ -21,7 +21,7 @@ class bgfx_texture : public bgfx_texture_handle_provider
 {
 public:
 	bgfx_texture(std::string name, bgfx::TextureFormat::Enum format, uint16_t width, uint16_t height, uint32_t flags, void* data);
-	bgfx_texture(std::string name, bgfx::TextureFormat::Enum format, uint16_t width, uint16_t height, const bgfx::Memory* data, uint32_t flags = BGFX_SAMPLER_U_CLAMP | BGFX_SAMPLER_V_CLAMP);
+	bgfx_texture(std::string name, bgfx::TextureFormat::Enum format, uint16_t width, uint16_t height, const bgfx::Memory* data, uint32_t flags = BGFX_SAMPLER_U_CLAMP | BGFX_SAMPLER_V_CLAMP, uint16_t pitch = UINT16_MAX);
 	virtual ~bgfx_texture();
 
 	// Getters
@@ -34,6 +34,8 @@ public:
 	virtual bgfx::TextureHandle texture() const override { return m_texture; }
 	virtual bool is_target() const override { return false; }
 
+	void update(const bgfx::Memory *data, uint16_t pitch = UINT16_MAX);
+
 protected:
 	std::string                 m_name;
 	bgfx::TextureFormat::Enum   m_format;

src/osd/modules/render/bgfx/texturemanager.cpp

@@ -116,8 +116,10 @@ bgfx::TextureHandle texture_manager::create_or_update_mame_texture(uint32_t form
 				}
 				else
 				{
-					const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(format, width, height, rowpixels, palette, base);
-					bgfx::updateTexture2D(handle, 0, 0, 0, 0, (uint16_t)width, (uint16_t)height, mem);
+					bgfx::TextureFormat::Enum dst_format = bgfx::TextureFormat::BGRA8;
+					uint16_t pitch = width;
+					const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(dst_format, format, width, height, rowpixels, palette, base, &pitch);
+					bgfx::updateTexture2D(handle, 0, 0, 0, 0, (uint16_t)width, (uint16_t)height, mem, pitch);
 					return handle;
 				}
 			}
@@ -142,8 +144,10 @@ bgfx::TextureHandle texture_manager::create_or_update_mame_texture(uint32_t form
 				}
 				else
 				{
-					const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(format, width, height, rowpixels, palette, base);
-					bgfx::updateTexture2D(handle, 0, 0, 0, 0, (uint16_t)width, (uint16_t)height, mem);
+					bgfx::TextureFormat::Enum dst_format = bgfx::TextureFormat::BGRA8;
+					uint16_t pitch = width;
+					const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(dst_format, format, width, height, rowpixels, palette, base, &pitch);
+					bgfx::updateTexture2D(handle, 0, 0, 0, 0, (uint16_t)width, (uint16_t)height, mem, pitch);
 					return handle;
 				}
 			}
@@ -151,9 +155,11 @@ bgfx::TextureHandle texture_manager::create_or_update_mame_texture(uint32_t form
 		}
 	}
 
-	const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(format, width, height, rowpixels, palette, base);
-	handle = bgfx::createTexture2D(width, height, false, 1, bgfx::TextureFormat::RGBA8, flags, nullptr);
-	bgfx::updateTexture2D(handle, 0, 0, 0, 0, (uint16_t)width, (uint16_t)height, mem);
+	bgfx::TextureFormat::Enum dst_format = bgfx::TextureFormat::BGRA8;
+	uint16_t pitch = width;
+	const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(dst_format, format, width, height, rowpixels, palette, base, &pitch);
+	handle = bgfx::createTexture2D(width, height, false, 1, dst_format, flags, nullptr);
+	bgfx::updateTexture2D(handle, 0, 0, 0, 0, (uint16_t)width, (uint16_t)height, mem, pitch);
 
 	m_mame_textures[key] = { handle, seqid, width, height };
 	return handle;

src/osd/modules/render/bgfxutil.cpp

@@ -14,37 +14,57 @@
 #include "render.h"
 
 
-const bgfx::Memory* bgfx_util::mame_texture_data_to_bgfx_texture_data(uint32_t format, int width, int height, int rowpixels, const rgb_t *palette, void *base)
+const bgfx::Memory* bgfx_util::mame_texture_data_to_bgfx_texture_data(bgfx::TextureFormat::Enum &dst_format, uint32_t src_format, int width, int height, int rowpixels, const rgb_t *palette, void *base, uint16_t *out_pitch)
 {
-	const bgfx::Memory* mem = bgfx::alloc(width * height * 4);
-	uint32_t* data = reinterpret_cast<uint32_t*>(mem->data);
+	bgfx::TextureInfo info;
+	switch (src_format)
+	{
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_PALETTE16):
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_YUY16):
+			dst_format = bgfx::TextureFormat::RG8;
+			if (out_pitch)
+				*out_pitch = rowpixels * 2;
+			break;
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_ARGB32):
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_RGB32):
+			dst_format = bgfx::TextureFormat::BGRA8;
+			if (out_pitch)
+				*out_pitch = rowpixels * 4;
+			break;
+	}
+	bgfx::calcTextureSize(info, rowpixels, height, 1, false, false, 1, dst_format);
+	return bgfx::copy(base, info.storageSize);
+	/*const bgfx::Memory* mem = bgfx::alloc(width * height * 4);
+	uint32_t* dst = reinterpret_cast<uint32_t*>(mem->data);
 	uint16_t* src16 = reinterpret_cast<uint16_t*>(base);
 	uint32_t* src32 = reinterpret_cast<uint32_t*>(base);
 
 	for (int y = 0; y < height; y++)
 	{
-		uint32_t* dst_line = data + y * width;
-		uint16_t* src_line16 = src16 + y * rowpixels;
-		uint32_t* src_line32 = src32 + y * rowpixels;
 		switch (format)
 		{
-			case PRIMFLAG_TEXFORMAT(TEXFORMAT_PALETTE16):
-				copy_util::copyline_palette16(dst_line, src_line16, width, palette);
-				break;
-			case PRIMFLAG_TEXFORMAT(TEXFORMAT_YUY16):
-				copy_util::copyline_yuy16_to_argb(dst_line, src_line16, width, palette, 1);
-				break;
-			case PRIMFLAG_TEXFORMAT(TEXFORMAT_ARGB32):
-				copy_util::copyline_argb32(dst_line, src_line32, width, palette);
-				break;
-			case PRIMFLAG_TEXFORMAT(TEXFORMAT_RGB32):
-				copy_util::copyline_rgb32(dst_line, src_line32, width, palette);
-				break;
-			default:
-				break;
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_PALETTE16):
+			copy_util::copyline_palette16(dst, src16, width, palette);
+			src16 += rowpixels;
+			break;
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_YUY16):
+			copy_util::copyline_yuy16_to_argb(dst, src16, width, palette, 1);
+			src16 += rowpixels;
+			break;
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_ARGB32):
+			copy_util::copyline_argb32(dst, src32, width, palette);
+			src32 += rowpixels;
+			break;
+		case PRIMFLAG_TEXFORMAT(TEXFORMAT_RGB32):
+			copy_util::copyline_rgb32(dst, src32, width, palette);
+			src32 += rowpixels;
+			break;
+		default:
+			break;
 		}
+		dst += width;
 	}
-	return mem;
+	return mem;*/
 }
 
 uint64_t bgfx_util::get_blend_state(uint32_t blend)

src/osd/modules/render/bgfxutil.h

@@ -11,7 +11,7 @@
 class bgfx_util
 {
 public:
-	static const bgfx::Memory* mame_texture_data_to_bgfx_texture_data(uint32_t format, int width, int height, int rowpixels, const rgb_t *palette, void *base);
+	static const bgfx::Memory* mame_texture_data_to_bgfx_texture_data(bgfx::TextureFormat::Enum &dst_format, uint32_t format, int width, int height, int rowpixels, const rgb_t *palette, void *base, uint16_t *out_pitch = nullptr);
 	static uint64_t get_blend_state(uint32_t blend);
 };
 

src/osd/modules/render/drawbgfx.cpp

@@ -1140,8 +1140,10 @@ void renderer_bgfx::process_atlas_packs(std::vector<std::vector<rectangle_packer
 				continue;
 			}
 			m_hash_to_entry[rect.hash()] = rect;
-			const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(rect.format(), rect.width(), rect.height(), rect.rowpixels(), rect.palette(), rect.base());
-			bgfx::updateTexture2D(m_texture_cache->texture(), 0, 0, rect.x(), rect.y(), rect.width(), rect.height(), mem);
+			bgfx::TextureFormat::Enum dst_format = bgfx::TextureFormat::RGBA8;
+			uint16_t pitch = rect.width();
+			const bgfx::Memory* mem = bgfx_util::mame_texture_data_to_bgfx_texture_data(dst_format, rect.format(), rect.width(), rect.height(), rect.rowpixels(), rect.palette(), rect.base(), &pitch);
+			bgfx::updateTexture2D(m_texture_cache->texture(), 0, 0, rect.x(), rect.y(), rect.width(), rect.height(), mem, pitch);
 		}
 	}
 }