gdrv: blit no more, present render:vScreen directly.

Improved split bitmap handling.

SpaceCadetPinball/GroupData.cpp

@@ -18,16 +18,6 @@ EntryData::~EntryData()
 			zdrv::destroy_zmap(reinterpret_cast<zmap_header_type*>(Buffer));
 		memory::free(Buffer);
 	}
-	if (DerivedBmp)
-	{
-		gdrv::destroy_bitmap(DerivedBmp);
-		memory::free(DerivedBmp);
-	}
-	if (DerivedZMap)
-	{
-		zdrv::destroy_zmap(DerivedZMap);
-		memory::free(DerivedZMap);
-	}
 }
 
 
@@ -38,8 +28,7 @@ GroupData::GroupData(int groupId)
 
 void GroupData::AddEntry(EntryData* entry)
 {
-	Entries.push_back(entry);
+	auto addEntry = true;
-
 	switch (entry->EntryType)
 	{
 	case FieldTypes::GroupName:
@@ -47,21 +36,23 @@ void GroupData::AddEntry(EntryData* entry)
 		break;
 	case FieldTypes::Bitmap8bit:
 		{
-			auto bmp = reinterpret_cast<gdrv_bitmap8*>(entry->Buffer);
+			auto srcBmp = reinterpret_cast<gdrv_bitmap8*>(entry->Buffer);
-			if (bmp->BitmapType == BitmapTypes::Spliced)
+			if (srcBmp->BitmapType == BitmapTypes::Spliced)
 			{
 				// Get rid of spliced bitmap early on, to simplify render pipeline
-				auto splitBmp = memory::allocate<gdrv_bitmap8>();
+				auto bmp = memory::allocate<gdrv_bitmap8>();
-				auto splitZMap = memory::allocate<zmap_header_type>();
+				auto zMap = memory::allocate<zmap_header_type>();
-				SplitSplicedBitmap(*bmp, *splitBmp, *splitZMap);
+				SplitSplicedBitmap(*srcBmp, *bmp, *zMap);
-				entry->DerivedBmp = splitBmp;
+
-				entry->DerivedZMap = splitZMap;
+				NeedsSort = true;
-				SetBitmap(splitBmp);
+				addEntry = false;
-				SetZMap(splitZMap);
+				AddEntry(new EntryData(FieldTypes::Bitmap8bit, reinterpret_cast<char*>(bmp)));
+				AddEntry(new EntryData(FieldTypes::Bitmap16bit, reinterpret_cast<char*>(zMap)));
+				delete entry;
 			}
 			else
 			{
-				SetBitmap(bmp);
+				SetBitmap(srcBmp);
 			}
 			break;
 		}
@@ -72,6 +63,24 @@ void GroupData::AddEntry(EntryData* entry)
 		}
 	default: break;
 	}
+
+	if (addEntry)
+		Entries.push_back(entry);
+}
+
+void GroupData::FinalizeGroup()
+{
+	if (NeedsSort)
+	{
+		// Entries within a group are sorted by EntryType, in ascending order.
+		// Dat files follow this rule, zMaps inserted in the middle break it.
+		NeedsSort = false;
+		std::sort(Entries.begin(), Entries.end(), [](const EntryData* lhs, const EntryData* rhs)
+		{
+			return lhs->EntryType < rhs->EntryType;
+		});
+		Entries.shrink_to_fit();
+	}
 }
 
 gdrv_bitmap8* GroupData::GetBitmap(int resolution) const

SpaceCadetPinball/GroupData.h

@@ -43,12 +43,16 @@ enum class FieldTypes : int16_t
 
 struct EntryData
 {
+	EntryData() = default;
+
+	EntryData(FieldTypes entryType, char* buffer): EntryType(entryType), FieldSize(-1), Buffer(buffer)
+	{
+	}
+
 	~EntryData();
 	FieldTypes EntryType{};
 	int FieldSize{};
 	char* Buffer{};
-	gdrv_bitmap8* DerivedBmp{};
-	zmap_header_type* DerivedZMap{};
 };
 
 class GroupData
@@ -59,6 +63,7 @@ public:
 
 	GroupData(int groupId);
 	void AddEntry(EntryData* entry);
+	void FinalizeGroup();
 	const std::vector<EntryData*>& GetEntries() const { return Entries; }
 	const EntryData* GetEntry(size_t index) const { return Entries[index]; }
 	size_t EntryCount() const { return Entries.size(); }
@@ -70,6 +75,7 @@ private:
 	std::vector<EntryData*> Entries;
 	gdrv_bitmap8* Bitmaps[3]{};
 	zmap_header_type* ZMaps[3]{};
+	bool NeedsSort = false;
 
 	static void SplitSplicedBitmap(const gdrv_bitmap8& srcBmp, gdrv_bitmap8& bmp, zmap_header_type& zMap);
 

SpaceCadetPinball/TTextBox.cpp

@@ -85,15 +85,7 @@ void TTextBox::Clear()
 			OffsetX,
 			OffsetY);
 	else
-		gdrv::fill_bitmap(&render::vscreen, Width, Height, OffsetX, OffsetY, 0);
+		gdrv::fill_bitmap(&render::vscreen, Width, Height, OffsetX, OffsetY, 0);	
-	gdrv::blit(
-		&render::vscreen,
-		OffsetX,
-		OffsetY,
-		OffsetX + render::vscreen.XPosition,
-		OffsetY + render::vscreen.YPosition,
-		Width,
-		Height);
 	if (Timer)
 	{
 		if (Timer != -1)
@@ -198,14 +190,6 @@ void TTextBox::Draw()
 		auto font = Font;
 		if (!font)
 		{
-			gdrv::blit(
-				&render::vscreen,
-				OffsetX,
-				OffsetY,
-				OffsetX + render::vscreen.XPosition,
-				OffsetY + render::vscreen.YPosition,
-				Width,
-				Height);
 			gdrv::grtext_draw_ttext_in_box(
 				Message1->Text,
 				render::vscreen.XPosition + OffsetX,
@@ -275,14 +259,5 @@ void TTextBox::Draw()
 			if ((*text & 0x7F) == '\n')
 				++text;
 		}
-	}
+	}	
-
-	gdrv::blit(
-		&render::vscreen,
-		OffsetX,
-		OffsetY,
-		OffsetX + render::vscreen.XPosition,
-		OffsetY + render::vscreen.YPosition,
-		Width,
-		Height);
 }

SpaceCadetPinball/fullscrn.cpp

@@ -121,7 +121,7 @@ void fullscrn::window_size_changed()
 		OffsetY = static_cast<int>(floor((height - res->TableHeight * ScaleY) / 2));
 	}
 
-	gdrv::DestinationRect = SDL_Rect
+	render::DestinationRect = SDL_Rect
 	{
 		OffsetX, OffsetY,
 		width - OffsetX * 2, height - OffsetY * 2

SpaceCadetPinball/gdrv.cpp

@@ -9,41 +9,7 @@
 #include "score.h"
 #include "winmain.h"
 
-SDL_Texture* gdrv::vScreenTex = nullptr;
-ColorRgba* gdrv::vScreenPixels = nullptr;
-int gdrv::vScreenWidth, gdrv::vScreenHeight;
 ColorRgba gdrv::current_palette[256]{};
-SDL_Rect gdrv::DestinationRect{};
-
-int gdrv::init(int width, int height)
-{
-	{
-		UsingSdlHint hint{SDL_HINT_RENDER_SCALE_QUALITY, options::Options.LinearFiltering ? "linear" : "nearest"};
-		vScreenTex = SDL_CreateTexture
-		(
-			winmain::Renderer,
-			SDL_PIXELFORMAT_ARGB8888,
-			SDL_TEXTUREACCESS_STREAMING,
-			width, height
-		);
-	}
-	vScreenWidth = width;
-	vScreenHeight = height;
-	vScreenPixels = new ColorRgba[width * height];
-
-	return 0;
-}
-
-int gdrv::uninit()
-{
-	SDL_DestroyTexture(vScreenTex);
-	delete[] vScreenPixels;
-	return 0;
-}
-
-void gdrv::get_focus()
-{
-}
 
 int gdrv::create_bitmap(gdrv_bitmap8* bmp, int width, int height, int stride, bool indexed)
 {
@@ -122,23 +88,23 @@ int gdrv::display_palette(ColorRgba* plt)
 {
 	const uint32_t sysPaletteColors[]
 	{
-		0x00000000, // Color 0: transparent
+		0xff000000, // Color 0: transparent
-		0x00000080,
+		0xff000080,
-		0x00008000,
+		0xff008000,
-		0x00008080,
+		0xff008080,
-		0x00800000,
+		0xff800000,
-		0x00800080,
+		0xff800080,
-		0x00808000,
+		0xff808000,
-		0x00C0C0C0,
+		0xffC0C0C0,
-		0x00C0DCC0,
+		0xffC0DCC0,
-		0x00F0CAA6
+		0xffF0CAA6
 	};
 
 	memcpy(current_palette, sysPaletteColors, sizeof sysPaletteColors);
 
 	for (int i = 0; i < 256; i++)
 	{
-		current_palette[i].rgba.peFlags = 0;
+		current_palette[i].rgba.Alpha = 0;
 	}
 
 	auto pltSrc = &plt[10];
@@ -147,18 +113,16 @@ int gdrv::display_palette(ColorRgba* plt)
 	{
 		if (plt)
 		{
-			pltDst->rgba.peRed = pltSrc->rgba.peRed;
+			pltDst->rgba.Blue = pltSrc->rgba.Blue;
-			pltDst->rgba.peGreen = pltSrc->rgba.peGreen;
+			pltDst->rgba.Green = pltSrc->rgba.Green;
-			pltDst->rgba.peBlue = pltSrc->rgba.peBlue;
+			pltDst->rgba.Red = pltSrc->rgba.Red;
 		}
-		pltDst->rgba.peFlags = 4;
+		pltDst->rgba.Alpha = 0xFF;
 		pltSrc++;
 		pltDst++;
 	}
 
-	current_palette[255].rgba.peBlue = -1;
+	current_palette[255].Color = 0xffFFFFFF;
-	current_palette[255].rgba.peGreen = -1;
-	current_palette[255].rgba.peRed = -1;
 
 	score::ApplyPalette();
 	for (const auto group : pb::record_table->Groups)
@@ -194,32 +158,6 @@ int gdrv::destroy_bitmap(gdrv_bitmap8* bmp)
 	return 0;
 }
 
-void gdrv::blit(gdrv_bitmap8* bmp, int xSrc, int ySrc, int xDest, int yDest, int width, int height)
-{
-	StretchDIBitsScaled(
-		xSrc,
-		ySrc,
-		xDest,
-		yDest,
-		width,
-		height,
-		bmp
-	);
-}
-
-void gdrv::blat(gdrv_bitmap8* bmp, int xDest, int yDest)
-{
-	StretchDIBitsScaled(
-		0,
-		0,
-		xDest,
-		yDest,
-		bmp->Width,
-		bmp->Height,
-		bmp
-	);
-}
-
 void gdrv::fill_bitmap(gdrv_bitmap8* bmp, int width, int height, int xOff, int yOff, uint8_t fillChar)
 {
 	auto color = current_palette[fillChar];
@@ -272,64 +210,6 @@ void gdrv::grtext_draw_ttext_in_box(LPCSTR text, int xOff, int yOff, int width,
 {
 }
 
-int gdrv::StretchDIBitsScaled(int xSrc, int ySrc, int xDst, int yDst,
-                              int width, int height, gdrv_bitmap8* bmp)
-{
-	// Negative dst == positive src offset
-	if (xDst < 0)
-	{
-		xSrc -= xDst;
-		xDst = 0;
-	}
-	if (yDst < 0)
-	{
-		ySrc -= yDst;
-		yDst = 0;
-	}
-
-	// Clamp out of bounds rectangles
-	xSrc = std::max(0, std::min(xSrc, bmp->Width));
-	ySrc = std::max(0, std::min(ySrc, bmp->Height));
-	if (xSrc + width > bmp->Width)
-		width = bmp->Width - xSrc;
-	if (ySrc + height > bmp->Height)
-		height = bmp->Height - ySrc;
-
-	xDst = std::max(0, std::min(xDst, vScreenWidth));
-	yDst = std::max(0, std::min(yDst, vScreenHeight));
-	if (xDst + width > vScreenWidth)
-		width = vScreenWidth - xDst;
-	if (yDst + height > vScreenHeight)
-		height = vScreenHeight - yDst;
-
-	auto srcPtr = &bmp->BmpBufPtr1[bmp->Stride * ySrc + xSrc];
-	auto dstPtr = &vScreenPixels[vScreenWidth * yDst + xDst];
-	for (int y = height; y > 0; --y)
-	{
-		std::memcpy(dstPtr, srcPtr, width * sizeof(ColorRgba));
-		srcPtr += bmp->Stride;
-		dstPtr += vScreenWidth;
-	}
-
-	return 0;
-}
-
-void gdrv::BlitScreen()
-{
-	int pitch = 0;
-	void* lockedPixels;
-	SDL_LockTexture
-	(
-		vScreenTex,
-		nullptr,
-		&lockedPixels,
-		&pitch
-	);
-	std::memcpy(lockedPixels, vScreenPixels, vScreenWidth * vScreenHeight * sizeof(ColorRgba));
-	SDL_UnlockTexture(vScreenTex);
-	SDL_RenderCopy(winmain::Renderer, vScreenTex, nullptr, &DestinationRect);
-}
-
 void gdrv::ApplyPalette(gdrv_bitmap8& bmp)
 {
 	if (bmp.BitmapType == BitmapTypes::None)

SpaceCadetPinball/gdrv.h

@@ -11,10 +11,10 @@ enum class BitmapTypes : uint8_t
 
 struct Rgba
 {
-	uint8_t peRed;
+	uint8_t Blue;
-	uint8_t peGreen;
+	uint8_t Green;
-	uint8_t peBlue;
+	uint8_t Red;
-	uint8_t peFlags;
+	uint8_t Alpha;
 };
 
 union ColorRgba
@@ -57,32 +57,18 @@ struct gdrv_bitmap8
 class gdrv
 {
 public:
-	static SDL_Rect DestinationRect;
-
-	static int init(int width, int height);
-	static int uninit();
-	static void get_focus();
 	static int create_bitmap(gdrv_bitmap8* bmp, int width, int height, int stride = -1, bool indexed = true);
 	static int create_bitmap(gdrv_bitmap8& bmp, const struct dat8BitBmpHeader& header);
 	static int destroy_bitmap(gdrv_bitmap8* bmp);
 	static int display_palette(ColorRgba* plt);
-	static void blit(gdrv_bitmap8* bmp, int xSrc, int ySrc, int xDest, int yDest, int width, int height);
-	static void blat(gdrv_bitmap8* bmp, int xDest, int yDest);
 	static void fill_bitmap(gdrv_bitmap8* bmp, int width, int height, int xOff, int yOff, uint8_t fillChar);
 	static void copy_bitmap(gdrv_bitmap8* dstBmp, int width, int height, int xOff, int yOff, gdrv_bitmap8* srcBmp,
 	                        int srcXOff, int srcYOff);
 	static void copy_bitmap_w_transparency(gdrv_bitmap8* dstBmp, int width, int height, int xOff, int yOff,
 	                                       gdrv_bitmap8* srcBmp, int srcXOff, int srcYOff);
 	static void grtext_draw_ttext_in_box(LPCSTR text, int xOff, int yOff, int width, int height, int a6);
-	static void BlitScreen();
 	static void ApplyPalette(gdrv_bitmap8& bmp);
 	static void CreatePreview(gdrv_bitmap8& bmp);
 private:
-	static SDL_Texture* vScreenTex;
-	static ColorRgba* vScreenPixels;
-	static int vScreenWidth, vScreenHeight;
 	static ColorRgba current_palette[256];
-
-	static int StretchDIBitsScaled(int xSrc, int ySrc, int xDst, int yDst,
-	                               int width, int height, gdrv_bitmap8* bmp);
 };

SpaceCadetPinball/nudge.cpp

@@ -68,7 +68,6 @@ void nudge::_nudge(float xDiff, float yDiff)
 	vector_type accelMod;
 	float invAccelX, invAccelY;
 
-	auto table = pb::MainTable;
 	auto ballList = pb::MainTable->BallList;
 	accelMod.X = xDiff * 0.5f;
 	accelMod.Y = yDiff * 0.5f;
@@ -91,10 +90,8 @@ void nudge::_nudge(float xDiff, float yDiff)
 			else
 				invAccelY = 1.0f / ball->Acceleration.Y;
 			ball->InvAcceleration.Y = invAccelY;
-			table = pb::MainTable;
 		}
 	}
 
-	render::shift(static_cast<int>(floor(xDiff + 0.5f)), static_cast<int>(floor(0.5f - yDiff)), 0, 0, table->Width,
+	render::shift(static_cast<int>(floor(xDiff + 0.5f)), static_cast<int>(floor(0.5f - yDiff)));
-	              table->Height);
 }

SpaceCadetPinball/options.cpp

@@ -217,7 +217,6 @@ void options::toggle(Menu1 uIDCheckItem)
 	case Menu1::WindowUniformScale:
 		Options.UniformScaling ^= true;
 		fullscrn::window_size_changed();
-		pb::paint();
 		break;
 	case Menu1::WindowLinearFilter:
 		Options.LinearFiltering ^= true;

SpaceCadetPinball/partman.cpp

@@ -130,6 +130,7 @@ DatFile* partman::load_records(LPCSTR lpFileName, bool fullTiltMode)
 			groupData->AddEntry(entryData);
 		}
 
+		groupData->FinalizeGroup();
 		datFile->Groups.push_back(groupData);
 	}
 

SpaceCadetPinball/pb.cpp

@@ -75,8 +75,7 @@ int pb::init()
 		zMin = cameraInfo[1];
 		zScaler = cameraInfo[2];
 	}
-
+	
-	gdrv::init(resInfo->TableWidth, resInfo->TableHeight);
 	render::init(nullptr, zMin, zScaler, resInfo->TableWidth, resInfo->TableHeight);
 	gdrv::copy_bitmap(
 		&render::vscreen,
@@ -116,7 +115,6 @@ int pb::uninit()
 	if (MainTable)
 		delete MainTable;
 	MainTable = nullptr;
-	gdrv::get_focus();
 	timer::uninit();
 	render::uninit();
 	return 0;
@@ -131,14 +129,7 @@ void pb::reset_table()
 
 void pb::firsttime_setup()
 {
-	render::blit = 0;
 	render::update();
-	render::blit = 1;
-}
-
-void pb::paint()
-{
-	render::paint();
 }
 
 void pb::mode_change(int mode)
@@ -493,9 +484,6 @@ void pb::keydown(int key)
 		case 's':
 			MainTable->AddScore(static_cast<int>(RandFloat() * 1000000.0f));
 			break;
-		case SDLK_F11:
-			gdrv::get_focus();
-			break;
 		case SDLK_F12:
 			MainTable->port_draw();
 			break;

SpaceCadetPinball/pb.h

@@ -44,7 +44,6 @@ public:
 	static int uninit();
 	static void reset_table();
 	static void firsttime_setup();
-	static void paint();
 	static void mode_change(int mode);
 	static void toggle_demo();
 	static void replay_level(int demoMode);

SpaceCadetPinball/render.cpp

@@ -3,9 +3,11 @@
 
 #include "GroupData.h"
 #include "memory.h"
+#include "options.h"
 #include "pb.h"
+#include "TPinballTable.h"
+#include "winmain.h"
 
-int render::blit = 0;
 int render::many_dirty, render::many_sprites, render::many_balls;
 render_sprite_type_struct **render::dirty_list, **render::sprite_list, **render::ball_list;
 zmap_header_type* render::background_zmap;
@@ -14,6 +16,8 @@ float render::zscaler, render::zmin, render::zmax;
 rectangle_type render::vscreen_rect;
 gdrv_bitmap8 render::vscreen, *render::background_bitmap, render::ball_bitmap[20];
 zmap_header_type render::zscreen;
+SDL_Texture* render::vScreenTex = nullptr;
+SDL_Rect render::DestinationRect{};
 
 void render::init(gdrv_bitmap8* bmp, float zMin, float zScaler, int width, int height)
 {
@@ -41,6 +45,18 @@ void render::init(gdrv_bitmap8* bmp, float zMin, float zScaler, int width, int h
 		gdrv::copy_bitmap(&vscreen, width, height, 0, 0, bmp, 0, 0);
 	else
 		gdrv::fill_bitmap(&vscreen, vscreen.Width, vscreen.Height, 0, 0, 0);
+
+	{
+		UsingSdlHint hint{SDL_HINT_RENDER_SCALE_QUALITY, options::Options.LinearFiltering ? "linear" : "nearest"};
+		vScreenTex = SDL_CreateTexture
+		(
+			winmain::Renderer,
+			SDL_PIXELFORMAT_ARGB8888,
+			SDL_TEXTUREACCESS_STREAMING,
+			width, height
+		);
+		SDL_SetTextureBlendMode(vScreenTex, SDL_BLENDMODE_NONE);
+	}
 	--memory::critical_allocation;
 }
 
@@ -60,154 +76,73 @@ void render::uninit()
 	many_sprites = 0;
 	many_dirty = 0;
 	many_balls = 0;
+	SDL_DestroyTexture(vScreenTex);
 }
 
 void render::update()
 {
-	rectangle_type overlapRect{};
+	unpaint_balls();
 
-	auto dirtyPtr = dirty_list;
+	// Clip dirty sprites with vScreen, clear clipping (dirty) rectangles 
-	for (int index = 0; index < many_dirty; ++dirtyPtr, ++index)
+	for (int index = 0; index < many_dirty; ++index)
 	{
-		auto curSprite = *dirtyPtr;
+		bool clearSprite = false;
-		if ((*dirtyPtr)->VisualType != VisualTypes::None)
+		auto curSprite = dirty_list[index];
+		switch (curSprite->VisualType)
 		{
-			if ((*dirtyPtr)->VisualType == VisualTypes::Sprite)
+		case VisualTypes::Sprite:
-			{
+			if (curSprite->DirtyRectPrev.Width > 0)
-				if (curSprite->BmpRectCopy.Width > 0)
+				maths::enclosing_box(&curSprite->DirtyRectPrev, &curSprite->BmpRect, &curSprite->DirtyRect);
-					maths::enclosing_box(&curSprite->BmpRectCopy, &curSprite->BmpRect, &curSprite->DirtyRect);
 
-				if (!maths::rectangle_clip(&curSprite->DirtyRect, &vscreen_rect, &curSprite->DirtyRect))
+			if (maths::rectangle_clip(&curSprite->DirtyRect, &vscreen_rect, &curSprite->DirtyRect))
-				{
+				clearSprite = true;
-					curSprite->DirtyRect.Width = -1;
+			else
-					continue;
-				}
-
-				auto yPos = curSprite->DirtyRect.YPosition;
-				auto width = curSprite->DirtyRect.Width;
-				auto xPos = curSprite->DirtyRect.XPosition;
-				auto height = curSprite->DirtyRect.Height;
-				zdrv::fill(&zscreen, width, height, xPos, yPos, 0xFFFF);
-				if (background_bitmap)
-					gdrv::copy_bitmap(&vscreen, width, height, xPos, yPos, background_bitmap, xPos, yPos);
-				else
-					gdrv::fill_bitmap(&vscreen, width, height, xPos, yPos, 0);
-			}
-		}
-		else
-		{
-			if (!maths::rectangle_clip(&curSprite->BmpRect, &vscreen_rect, &curSprite->DirtyRect))
-			{
 				curSprite->DirtyRect.Width = -1;
-				continue;
+			break;
-			}
+		case VisualTypes::None:
-			if (!curSprite->Bmp)
+			if (maths::rectangle_clip(&curSprite->BmpRect, &vscreen_rect, &curSprite->DirtyRect))
-			{
+				clearSprite = !curSprite->Bmp;
-				auto yPos = curSprite->DirtyRect.YPosition;
+			else
-				auto width = curSprite->DirtyRect.Width;
+				curSprite->DirtyRect.Width = -1;
-				auto xPos = curSprite->DirtyRect.XPosition;
+			break;
-				auto height = curSprite->DirtyRect.Height;
+		default: break;
-				zdrv::fill(&zscreen, width, height, xPos, yPos, 0xFFFF);
+		}
-				if (background_bitmap)
+
-					gdrv::copy_bitmap(&vscreen, width, height, xPos, yPos, background_bitmap, xPos, yPos);
+		if (clearSprite)
-				else
+		{
-					gdrv::fill_bitmap(&vscreen, width, height, xPos, yPos, 0);
+			auto yPos = curSprite->DirtyRect.YPosition;
-			}
+			auto width = curSprite->DirtyRect.Width;
+			auto xPos = curSprite->DirtyRect.XPosition;
+			auto height = curSprite->DirtyRect.Height;
+			zdrv::fill(&zscreen, width, height, xPos, yPos, 0xFFFF);
+			if (background_bitmap)
+				gdrv::copy_bitmap(&vscreen, width, height, xPos, yPos, background_bitmap, xPos, yPos);
+			else
+				gdrv::fill_bitmap(&vscreen, width, height, xPos, yPos, 0);
 		}
 	}
 
-	dirtyPtr = dirty_list;
+	// Paint dirty rectangles of dirty sprites
 	for (int index = 0; index < many_dirty; ++index)
 	{
-		auto sprite = *dirtyPtr;
+		auto sprite = dirty_list[index];
-		if ((*dirtyPtr)->DirtyRect.Width > 0 && (sprite->VisualType == VisualTypes::None || sprite->VisualType ==
+		if (sprite->DirtyRect.Width > 0 && (sprite->VisualType == VisualTypes::None || sprite->VisualType ==
 			VisualTypes::Sprite))
-			repaint(*dirtyPtr);
+			repaint(sprite);
-		++dirtyPtr;
 	}
 
 	paint_balls();
-	if (blit)
+
+	// In the original, this used to blit dirty sprites and balls
+	for (int index = 0; index < many_dirty; ++index)
 	{
-		auto xPos = vscreen.XPosition + offset_x;
+		auto sprite = dirty_list[index];
-		auto yPos = vscreen.YPosition + offset_y;
+		sprite->DirtyRectPrev = sprite->DirtyRect;
-		dirtyPtr = dirty_list;
+		if (sprite->UnknownFlag != 0)
-		for (int index = 0; index < many_dirty; ++dirtyPtr, ++index)
+			remove_sprite(sprite);
-		{
-			auto sprite = *dirtyPtr;
-			auto dirtyRect = &(*dirtyPtr)->DirtyRect;
-			auto width2 = (*dirtyPtr)->DirtyRect.Width;
-			if (width2 > 0)
-				gdrv::blit(
-					&vscreen,
-					dirtyRect->XPosition,
-					dirtyRect->YPosition,
-					dirtyRect->XPosition + xPos,
-					dirtyRect->YPosition + yPos,
-					width2,
-					dirtyRect->Height);
-
-			auto rect = &sprite->BmpRectCopy;
-			rect->XPosition = dirtyRect->XPosition;
-			rect->YPosition = dirtyRect->YPosition;
-			rect->Width = dirtyRect->Width;
-			rect->Height = dirtyRect->Height;
-
-			if (sprite->UnknownFlag != 0)
-				remove_sprite(sprite);
-		}
-
-		dirtyPtr = ball_list;
-		for (int index = 0; index < many_balls; ++dirtyPtr, ++index)
-		{
-			auto rectCopy = &(*dirtyPtr)->BmpRectCopy;
-			auto dirtyRect = &(*dirtyPtr)->DirtyRect;
-			if (maths::overlapping_box(dirtyRect, rectCopy, &overlapRect) && dirtyRect->Width > 0)
-			{
-				if (overlapRect.Width > 0)
-					gdrv::blit(
-						&vscreen,
-						overlapRect.XPosition,
-						overlapRect.YPosition,
-						overlapRect.XPosition + xPos,
-						overlapRect.YPosition + yPos,
-						overlapRect.Width,
-						overlapRect.Height);
-			}
-			else
-			{
-				if (dirtyRect->Width > 0)
-					gdrv::blit(
-						&vscreen,
-						dirtyRect->XPosition,
-						dirtyRect->YPosition,
-						dirtyRect->XPosition + xPos,
-						dirtyRect->YPosition + yPos,
-						dirtyRect->Width,
-						dirtyRect->Height);
-				if (rectCopy->Width > 0)
-					gdrv::blit(
-						&vscreen,
-						rectCopy->XPosition,
-						rectCopy->YPosition,
-						rectCopy->XPosition + xPos,
-						rectCopy->YPosition + yPos,
-						rectCopy->Width,
-						rectCopy->Height);
-			}
-		}
 	}
 
 	many_dirty = 0;
-	unpaint_balls();
-}
-
-
-void render::paint()
-{
-	paint_balls();
-	gdrv::blat(&vscreen, vscreen.XPosition, vscreen.YPosition);
-	unpaint_balls();
 }
 
 void render::sprite_modified(render_sprite_type_struct* sprite)
@@ -260,7 +195,7 @@ render_sprite_type_struct* render::create_sprite(VisualTypes visualType, gdrv_bi
 		sprite->ZMapOffestY = xPosition - zmap_offset;
 		sprite->ZMapOffestX = yPosition - zmap_offsetY;
 	}
-	sprite->BmpRectCopy = sprite->BmpRect;
+	sprite->DirtyRectPrev = sprite->BmpRect;
 	if (visualType == VisualTypes::Ball)
 	{
 		ball_list[many_balls++] = sprite;
@@ -389,10 +324,10 @@ void render::repaint(struct render_sprite_type_struct* sprite)
 		return;
 	for (int index = 0; index < sprite->SpriteCount; index++)
 	{
-		render_sprite_type_struct* curSprite = sprite->SpriteArray[index];
+		auto refSprite = sprite->SpriteArray[index];
-		if (!curSprite->UnknownFlag && curSprite->Bmp)
+		if (!refSprite->UnknownFlag && refSprite->Bmp)
 		{
-			if (maths::rectangle_clip(&curSprite->BmpRect, &sprite->DirtyRect, &clipRect))
+			if (maths::rectangle_clip(&refSprite->BmpRect, &sprite->DirtyRect, &clipRect))
 				zdrv::paint(
 					clipRect.Width,
 					clipRect.Height,
@@ -402,12 +337,12 @@ void render::repaint(struct render_sprite_type_struct* sprite)
 					&zscreen,
 					clipRect.XPosition,
 					clipRect.YPosition,
-					curSprite->Bmp,
+					refSprite->Bmp,
-					clipRect.XPosition - curSprite->BmpRect.XPosition,
+					clipRect.XPosition - refSprite->BmpRect.XPosition,
-					clipRect.YPosition - curSprite->BmpRect.YPosition,
+					clipRect.YPosition - refSprite->BmpRect.YPosition,
-					curSprite->ZMap,
+					refSprite->ZMap,
-					clipRect.XPosition + curSprite->ZMapOffestY - curSprite->BmpRect.XPosition,
+					clipRect.XPosition + refSprite->ZMapOffestY - refSprite->BmpRect.XPosition,
-					clipRect.YPosition + curSprite->ZMapOffestX - curSprite->BmpRect.YPosition);
+					clipRect.YPosition + refSprite->ZMapOffestX - refSprite->BmpRect.YPosition);
 		}
 	}
 }
@@ -415,62 +350,55 @@ void render::repaint(struct render_sprite_type_struct* sprite)
 
 void render::paint_balls()
 {
-	int ballCount = many_balls;
+	// Sort ball sprites by depth
-	if (many_balls > 1)
+	for (auto i = 0; i < many_balls; i++)
 	{
-		for (int index = 0; index < ballCount; index++)
+		for (auto j = i; j < many_balls / 2; ++j)
 		{
-			for (int i = index; i < ballCount / 2; ++i)
+			auto ballA = ball_list[j];
+			auto ballB = ball_list[i];
+			if (ballB->Depth > ballA->Depth)
 			{
-				auto curBall = ball_list[i];
+				ball_list[i] = ballA;
-				auto firstBallPtr = &ball_list[index];
+				ball_list[j] = ballB;
-				if ((*firstBallPtr)->Depth > curBall->Depth)
-				{
-					auto firstBall = *firstBallPtr;
-					*firstBallPtr = curBall;
-					ball_list[i] = firstBall;
-				}
 			}
 		}
 	}
 
-	auto ballPtr = ball_list;
+	// For balls that clip vScreen: save original vScreen contents and paint ball bitmap.
-	auto ballBmpPtr = ball_bitmap;
+	for (auto index = 0; index < many_balls; ++index)
-	for (int index2 = 0; index2 < many_balls; ++index2)
 	{
-		struct render_sprite_type_struct* sprite = *ballPtr;
+		auto ball = ball_list[index];
-		rectangle_type* rect2 = &(*ballPtr)->DirtyRect;
+		auto dirty = &ball->DirtyRect;
-		if ((*ballPtr)->Bmp && maths::rectangle_clip(&sprite->BmpRect, &vscreen_rect, &(*ballPtr)->DirtyRect))
+		if (ball->Bmp && maths::rectangle_clip(&ball->BmpRect, &vscreen_rect, &ball->DirtyRect))
 		{
-			int xPos = rect2->XPosition;
+			int xPos = dirty->XPosition;
-			int yPos = rect2->YPosition;
+			int yPos = dirty->YPosition;
-			gdrv::copy_bitmap(ballBmpPtr, rect2->Width, rect2->Height, 0, 0, &vscreen, xPos, yPos);
+			gdrv::copy_bitmap(&ball_bitmap[index], dirty->Width, dirty->Height, 0, 0, &vscreen, xPos, yPos);
 			zdrv::paint_flat(
-				rect2->Width,
+				dirty->Width,
-				rect2->Height,
+				dirty->Height,
 				&vscreen,
 				xPos,
 				yPos,
 				&zscreen,
 				xPos,
 				yPos,
-				sprite->Bmp,
+				ball->Bmp,
-				xPos - sprite->BmpRect.XPosition,
+				xPos - ball->BmpRect.XPosition,
-				yPos - sprite->BmpRect.YPosition,
+				yPos - ball->BmpRect.YPosition,
-				sprite->Depth);
+				ball->Depth);
 		}
 		else
 		{
-			rect2->Width = -1;
+			dirty->Width = -1;
 		}
-
-		++ballBmpPtr;
-		++ballPtr;
 	}
 }
 
 void render::unpaint_balls()
 {
+	// Restore portions of vScreen saved during previous paint_balls call.
 	for (int index = many_balls - 1; index >= 0; index--)
 	{
 		auto curBall = ball_list[index];
@@ -485,63 +413,54 @@ void render::unpaint_balls()
 				0,
 				0);
 
-		curBall->BmpRectCopy = curBall->DirtyRect;
+		curBall->DirtyRectPrev = curBall->DirtyRect;
 	}
 }
 
-void render::shift(int offsetX, int offsetY, int xSrc, int ySrc, int DestWidth, int DestHeight)
+void render::shift(int offsetX, int offsetY)
 {
 	offset_x += offsetX;
 	offset_y += offsetY;
-	paint_balls();
-	gdrv::blit(
-		&vscreen,
-		xSrc,
-		ySrc,
-		xSrc + offset_x + vscreen.XPosition,
-		ySrc + offset_y + vscreen.YPosition,
-		DestWidth,
-		DestHeight);
-	unpaint_balls();
 }
 
 void render::build_occlude_list()
 {
 	++memory::critical_allocation;
 	render_sprite_type_struct** spriteArr = nullptr;
-	auto spritePtr1 = sprite_list;
+	for (int index = 0; index < many_sprites; ++index)
-	for (int index = 0; index < many_sprites; ++index, ++spritePtr1)
 	{
-		auto curSprite = *spritePtr1;
+		auto mainSprite = sprite_list[index];
-		if ((*spritePtr1)->SpriteArray)
+		if (mainSprite->SpriteArray)
 		{
-			memory::free((*spritePtr1)->SpriteArray);
+			memory::free(mainSprite->SpriteArray);
-			curSprite->SpriteArray = nullptr;
+			mainSprite->SpriteArray = nullptr;
-			curSprite->SpriteCount = 0;
+			mainSprite->SpriteCount = 0;
 		}
-		if (!curSprite->UnknownFlag && curSprite->BoundingRect.Width != -1)
+
+		if (!mainSprite->UnknownFlag && mainSprite->BoundingRect.Width != -1)
 		{
 			if (!spriteArr)
 				spriteArr = memory::allocate<render_sprite_type_struct*>(1000);
+
 			int occludeCount = 0;
-			auto spritePtr2 = sprite_list;
+			for (int i = 0; i < many_sprites; ++i)
-			for (int i = 0; i < many_sprites; ++i, ++spritePtr2)
 			{
-				auto sprite = *spritePtr2;
+				auto refSprite = sprite_list[i];
-				if (!sprite->UnknownFlag
+				if (!refSprite->UnknownFlag
-					&& sprite->BoundingRect.Width != -1
+					&& refSprite->BoundingRect.Width != -1
-					&& maths::rectangle_clip(&curSprite->BoundingRect, &sprite->BoundingRect, nullptr)
+					&& maths::rectangle_clip(&mainSprite->BoundingRect, &refSprite->BoundingRect, nullptr)
 					&& spriteArr)
 				{
-					spriteArr[occludeCount++] = sprite;
+					spriteArr[occludeCount++] = refSprite;
 				}
 			}
-			if (!curSprite->UnknownFlag && curSprite->Bmp && occludeCount < 2)
+
+			if (!mainSprite->UnknownFlag && mainSprite->Bmp && occludeCount < 2)
 				occludeCount = 0;
 			if (occludeCount)
 			{
-				curSprite->SpriteArray = memory::realloc(spriteArr, sizeof(void*) * occludeCount);
+				mainSprite->SpriteArray = memory::realloc(spriteArr, sizeof(void*) * occludeCount);
-				curSprite->SpriteCount = occludeCount;
+				mainSprite->SpriteCount = occludeCount;
 				spriteArr = nullptr;
 			}
 		}
@@ -644,3 +563,81 @@ void render::SpriteViewer(bool* show)
 	}
 	ImGui::End();
 }
+
+void render::BlitVScreen()
+{
+	int pitch = 0;
+	ColorRgba* lockedPixels;
+	SDL_LockTexture
+	(
+		vScreenTex,
+		nullptr,
+		reinterpret_cast<void**>(&lockedPixels),
+		&pitch
+	);
+	assertm(pitch == vscreen.Width * sizeof(ColorRgba), "Padding on vScreen texture");
+
+	if (offset_x == 0 && offset_y == 0)
+	{
+		// No offset - direct copy
+		std::memcpy(lockedPixels, vscreen.BmpBufPtr1, vscreen.Width * vscreen.Height * sizeof(ColorRgba));
+	}
+	else
+	{
+		// Copy offset table and fixed side bar
+		auto tableWidth = pb::MainTable->Width;
+		auto scoreWidth = vscreen.Width - pb::MainTable->Width;
+		auto tableStride = tableWidth * sizeof(ColorRgba);
+		auto scoreStride = scoreWidth * sizeof(ColorRgba);
+		auto srcScorePtr = &vscreen.BmpBufPtr1[tableWidth];
+
+		auto xSrc = 0, ySrc = 0, xDst = offset_x, yDst = offset_y, height = vscreen.Height;
+
+		// Negative dst == positive src offset
+		if (xDst < 0)
+		{
+			xSrc -= xDst;
+			xDst = 0;
+		}
+		if (yDst < 0)
+		{
+			ySrc -= yDst;
+			yDst = 0;
+		}
+
+		if (xSrc)
+		{
+			tableStride -= xSrc * sizeof(ColorRgba);
+		}
+		if (xDst)
+		{
+			tableStride -= xDst * sizeof(ColorRgba);
+			tableWidth -= xDst;
+			scoreWidth += xDst;
+		}
+		if (ySrc)
+			height -= ySrc;
+
+		auto srcBmpPtr = &vscreen.BmpBufPtr1[vscreen.Width * ySrc + xSrc];
+		auto dstPtr = &lockedPixels[vscreen.Width * yDst + xDst];
+		for (int y = height; y > 0; --y)
+		{
+			std::memcpy(dstPtr, srcBmpPtr, tableStride);
+			dstPtr += tableWidth;
+			std::memcpy(dstPtr, srcScorePtr, scoreStride);
+			dstPtr += scoreWidth;
+
+			srcBmpPtr += vscreen.Stride;
+			srcScorePtr += vscreen.Stride;
+		}
+	}
+
+
+	SDL_UnlockTexture(vScreenTex);
+}
+
+void render::PresentVScreen()
+{
+	BlitVScreen();
+	SDL_RenderCopy(winmain::Renderer, vScreenTex, nullptr, &DestinationRect);
+}

SpaceCadetPinball/render.h

@@ -18,7 +18,7 @@ struct render_sprite_type_struct
 	char UnknownFlag;
 	VisualTypes VisualType;
 	int16_t Depth;
-	rectangle_type BmpRectCopy;
+	rectangle_type DirtyRectPrev;
 	int ZMapOffestY;
 	int ZMapOffestX;
 	rectangle_type DirtyRect;
@@ -31,20 +31,12 @@ struct render_sprite_type_struct
 class render
 {
 public:
-	static int blit;
+	static gdrv_bitmap8 vscreen, *background_bitmap;
-	static int many_dirty, many_sprites, many_balls;
+	static SDL_Rect DestinationRect;
-	static render_sprite_type_struct **dirty_list, **sprite_list, **ball_list;
-	static zmap_header_type* background_zmap;
-	static int zmap_offset, zmap_offsetY, offset_x, offset_y;
-	static float zscaler, zmin, zmax;
-	static rectangle_type vscreen_rect;
-	static gdrv_bitmap8 vscreen, *background_bitmap, ball_bitmap[20];
-	static zmap_header_type zscreen;
 
 	static void init(gdrv_bitmap8* bmp, float zMin, float zScaler, int width, int height);
 	static void uninit();
 	static void update();
-	static void paint();
 	static void sprite_modified(render_sprite_type_struct* sprite);
 	static render_sprite_type_struct* create_sprite(VisualTypes visualType, gdrv_bitmap8* bmp,
 	                                                zmap_header_type* zMap,
@@ -55,11 +47,24 @@ public:
 	                       int yPos);
 	static void sprite_set_bitmap(render_sprite_type_struct* sprite, gdrv_bitmap8* bmp);
 	static void set_background_zmap(struct zmap_header_type* zMap, int offsetX, int offsetY);
-	static void ball_set(render_sprite_type_struct* sprite, gdrv_bitmap8* bmp, float depth, int xPos, int yPos);
+	static void ball_set(render_sprite_type_struct* sprite, gdrv_bitmap8* bmp, float depth, int xPos, int yPos);	
+	static void shift(int offsetX, int offsetY);
+	static void build_occlude_list();
+	static void SpriteViewer(bool* show);
+	static void PresentVScreen();
+private:
+	static int many_dirty, many_sprites, many_balls;
+	static render_sprite_type_struct **dirty_list, **sprite_list, **ball_list;
+	static zmap_header_type* background_zmap;
+	static int zmap_offset, zmap_offsetY, offset_x, offset_y;
+	static float zscaler, zmin, zmax;
+	static rectangle_type vscreen_rect;
+	static gdrv_bitmap8 ball_bitmap[20];
+	static zmap_header_type zscreen;
+	static SDL_Texture* vScreenTex;
+
 	static void repaint(struct render_sprite_type_struct* sprite);
 	static void paint_balls();
 	static void unpaint_balls();
-	static void shift(int offsetX, int offsetY, int xSrc, int ySrc, int DestWidth, int DestHeight);
+	static void BlitVScreen();
-	static void build_occlude_list();
-	static void SpriteViewer(bool* show);
 };

SpaceCadetPinball/score.cpp

@@ -207,16 +207,7 @@ void score::erase(scoreStruct* score, int blitFlag)
 				score->OffsetX,
 				score->OffsetY);
 		else
-			gdrv::fill_bitmap(&render::vscreen, score->Width, score->Height, score->OffsetX, score->OffsetY, 0);
+			gdrv::fill_bitmap(&render::vscreen, score->Width, score->Height, score->OffsetX, score->OffsetY, 0);		
-		if (blitFlag)
-			gdrv::blit(
-				&render::vscreen,
-				score->OffsetX,
-				score->OffsetY,
-				score->OffsetX + render::vscreen.XPosition,
-				score->OffsetY + render::vscreen.YPosition,
-				score->Width,
-				score->Height);
 	}
 }
 
@@ -255,15 +246,7 @@ void score::update(scoreStruct* score)
 				else
 					gdrv::copy_bitmap(&render::vscreen, width, height, x, y, bmp, 0, 0);
 			}
-		}
+		}		
-		gdrv::blit(
-			&render::vscreen,
-			score->OffsetX,
-			score->OffsetY,
-			score->OffsetX + render::vscreen.XPosition,
-			score->OffsetY + render::vscreen.YPosition,
-			score->Width,
-			score->Height);
 	}
 }
 

SpaceCadetPinball/winmain.cpp

@@ -212,7 +212,7 @@ int winmain::WinMain(LPCSTR lpCmdLine)
 							gdrv::create_bitmap(&gfr_display, 400, 15, 400, false);
 						}
 
-						gdrv::blit(&gfr_display, 0, 0, 0, 30, 300, 10);
+						gdrv::copy_bitmap(&render::vscreen, 300, 10, 0, 30, &gfr_display, 0, 0);
 						gdrv::fill_bitmap(&gfr_display, 300, 10, 0, 0, 0);
 					}
 				}
@@ -284,7 +284,7 @@ int winmain::WinMain(LPCSTR lpCmdLine)
 				RenderUi();
 
 				SDL_RenderClear(renderer);
-				gdrv::BlitScreen();
+				render::PresentVScreen();
 
 				ImGui::Render();
 				ImGuiSDL::Render(ImGui::GetDrawData());
@@ -307,7 +307,6 @@ int winmain::WinMain(LPCSTR lpCmdLine)
 	midi::music_shutdown();
 	pb::uninit();
 	Sound::Close();
-	gdrv::uninit();
 	ImGuiSDL::Deinitialize();
 	ImGui_ImplSDL2_Shutdown();
 	SDL_DestroyRenderer(renderer);
@@ -649,8 +648,6 @@ int winmain::event_handler(const SDL_Event* event)
 				midi::play_pb_theme(0);
 			no_time_loss = 1;
 			has_focus = 1;
-			gdrv::get_focus();
-			pb::paint();
 			break;
 		case SDL_WINDOWEVENT_FOCUS_LOST:
 		case SDL_WINDOWEVENT_HIDDEN:
@@ -660,7 +657,6 @@ int winmain::event_handler(const SDL_Event* event)
 			Sound::Deactivate();
 			midi::music_stop();
 			has_focus = 0;
-			gdrv::get_focus();
 			pb::loose_focus();
 			break;
 		case SDL_WINDOWEVENT_SIZE_CHANGED:
@@ -698,7 +694,6 @@ void winmain::memalloc_failure()
 {
 	midi::music_stop();
 	Sound::Close();
-	gdrv::uninit();
 	char* caption = pinball::get_rc_string(170, 0);
 	char* text = pinball::get_rc_string(179, 0);
 	SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, caption, text, MainWindow);
@@ -723,7 +718,10 @@ void winmain::a_dialog()
 		ImGui::TextUnformatted("Decompiled -> Ported to SDL");
 		if (ImGui::SmallButton("Project home: https://github.com/k4zmu2a/SpaceCadetPinball"))
 		{
+#if SDL_VERSION_ATLEAST(2, 0, 14)
+			// Relatively new feature, skip with older SDL
 			SDL_OpenURL("https://github.com/k4zmu2a/SpaceCadetPinball");
+#endif
 		}
 		ImGui::Separator();
 

SpaceCadetPinball/zdrv.cpp

@@ -127,9 +127,9 @@ void zdrv::CreatePreview(zmap_header_type& zMap)
 		for (auto x = 0; x < zMap.Width; x++)
 		{
 			auto depth = static_cast<uint8_t>((0xffff - *src++) / 0xff);
-			color.rgba.peRed = depth;
+			color.rgba.Blue = depth;
-			color.rgba.peGreen = depth;
+			color.rgba.Green = depth;
-			color.rgba.peBlue = depth;
+			color.rgba.Red = depth;
 			*dst++ = color;
 		}
 		src += zMap.Stride - zMap.Width;