Merge branch 'master' into stable

1 files changed, 248 insertions, 0 deletions

diff --git a/Source/Core/VideoCommon/BPFunctions.cpp b/Source/Core/VideoCommon/BPFunctions.cpp
new file mode 100644
index 0000000000..4150a7cf31
--- /dev/null
+++ b/Source/Core/VideoCommon/BPFunctions.cpp
@@ -0,0 +1,248 @@
+// Copyright 2009 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Common/CommonTypes.h"
+
+#include "Core/ConfigManager.h"
+#include "Core/HW/Memmap.h"
+
+#include "VideoCommon/BPFunctions.h"
+#include "VideoCommon/RenderBase.h"
+#include "VideoCommon/TextureCacheBase.h"
+#include "VideoCommon/VertexManagerBase.h"
+#include "VideoCommon/VertexShaderManager.h"
+#include "VideoCommon/VideoConfig.h"
+
+namespace BPFunctions
+{
+// ----------------------------------------------
+// State translation lookup tables
+// Reference: Yet Another GameCube Documentation
+// ----------------------------------------------
+
+
+void FlushPipeline()
+{
+	VertexManager::Flush();
+}
+
+void SetGenerationMode()
+{
+	g_renderer->SetGenerationMode();
+}
+
+void SetScissor()
+{
+	/* NOTE: the minimum value here for the scissor rect and offset is -342.
+	 * GX internally adds on an offset of 342 to both the offset and scissor
+	 * coords to ensure that the register was always unsigned.
+	 *
+	 * The code that was here before tried to "undo" this offset, but
+	 * since we always take the difference, the +342 added to both
+	 * sides cancels out. */
+
+	/* The scissor offset is always even, so to save space, the scissor offset
+	 * register is scaled down by 2. So, if somebody calls
+	 * GX_SetScissorBoxOffset(20, 20); the registers will be set to 10, 10. */
+	const int xoff = bpmem.scissorOffset.x * 2;
+	const int yoff = bpmem.scissorOffset.y * 2;
+
+	EFBRectangle rc (bpmem.scissorTL.x - xoff,     bpmem.scissorTL.y - yoff,
+	                 bpmem.scissorBR.x - xoff + 1, bpmem.scissorBR.y - yoff + 1);
+
+	if (rc.left < 0) rc.left = 0;
+	if (rc.top < 0) rc.top = 0;
+	if (rc.right > EFB_WIDTH) rc.right = EFB_WIDTH;
+	if (rc.bottom > EFB_HEIGHT) rc.bottom = EFB_HEIGHT;
+
+	if (rc.left > rc.right) rc.right = rc.left;
+	if (rc.top > rc.bottom) rc.bottom = rc.top;
+
+	g_renderer->SetScissorRect(rc);
+}
+
+void SetDepthMode()
+{
+	g_renderer->SetDepthMode();
+}
+
+void SetBlendMode()
+{
+	g_renderer->SetBlendMode(false);
+}
+void SetDitherMode()
+{
+	g_renderer->SetDitherMode();
+}
+void SetLogicOpMode()
+{
+	g_renderer->SetLogicOpMode();
+}
+
+void SetColorMask()
+{
+	g_renderer->SetColorMask();
+}
+
+void CopyEFB(u32 dstAddr, const EFBRectangle& srcRect,
+	     unsigned int dstFormat, PEControl::PixelFormat srcFormat,
+	     bool isIntensity, bool scaleByHalf)
+{
+	// bpmem.zcontrol.pixel_format to PEControl::Z24 is when the game wants to copy from ZBuffer (Zbuffer uses 24-bit Format)
+	TextureCache::CopyRenderTargetToTexture(dstAddr, dstFormat, srcFormat,
+		srcRect, isIntensity, scaleByHalf);
+}
+
+/* Explanation of the magic behind ClearScreen:
+	There's numerous possible formats for the pixel data in the EFB.
+	However, in the HW accelerated backends we're always using RGBA8
+	for the EFB format, which causes some problems:
+	- We're using an alpha channel although the game doesn't
+	- If the actual EFB format is RGBA6_Z24 or R5G6B5_Z16, we are using more bits per channel than the native HW
+
+	To properly emulate the above points, we're doing the following:
+	(1)
+		- disable alpha channel writing of any kind of rendering if the actual EFB format doesn't use an alpha channel
+		- NOTE: Always make sure that the EFB has been cleared to an alpha value of 0xFF in this case!
+		- Same for color channels, these need to be cleared to 0x00 though.
+	(2)
+		- convert the RGBA8 color to RGBA6/RGB8/RGB565 and convert it to RGBA8 again
+		- convert the Z24 depth value to Z16 and back to Z24
+*/
+void ClearScreen(const EFBRectangle &rc)
+{
+	bool colorEnable = (bpmem.blendmode.colorupdate != 0);
+	bool alphaEnable = (bpmem.blendmode.alphaupdate != 0);
+	bool zEnable = (bpmem.zmode.updateenable != 0);
+	auto pixel_format = bpmem.zcontrol.pixel_format;
+
+	// (1): Disable unused color channels
+	if (pixel_format == PEControl::RGB8_Z24 ||
+		pixel_format == PEControl::RGB565_Z16 ||
+		pixel_format == PEControl::Z24)
+	{
+		alphaEnable = false;
+	}
+
+	if (colorEnable || alphaEnable || zEnable)
+	{
+		u32 color = (bpmem.clearcolorAR << 16) | bpmem.clearcolorGB;
+		u32 z = bpmem.clearZValue;
+
+		// (2) drop additional accuracy
+		if (pixel_format == PEControl::RGBA6_Z24)
+		{
+			color = RGBA8ToRGBA6ToRGBA8(color);
+		}
+		else if (pixel_format == PEControl::RGB565_Z16)
+		{
+			color = RGBA8ToRGB565ToRGBA8(color);
+			z = Z24ToZ16ToZ24(z);
+		}
+		g_renderer->ClearScreen(rc, colorEnable, alphaEnable, zEnable, color, z);
+	}
+}
+
+void OnPixelFormatChange()
+{
+	int convtype = -1;
+
+	// TODO : Check for Z compression format change
+	// When using 16bit Z, the game may enable a special compression format which we need to handle
+	// If we don't, Z values will be completely screwed up, currently only Star Wars:RS2 uses that.
+
+	/*
+	 * When changing the EFB format, the pixel data won't get converted to the new format but stays the same.
+	 * Since we are always using an RGBA8 buffer though, this causes issues in some games.
+	 * Thus, we reinterpret the old EFB data with the new format here.
+	 */
+	if (!g_ActiveConfig.bEFBEmulateFormatChanges)
+		return;
+
+	auto old_format = Renderer::GetPrevPixelFormat();
+	auto new_format = bpmem.zcontrol.pixel_format;
+
+	// no need to reinterpret pixel data in these cases
+	if (new_format == old_format || old_format == PEControl::INVALID_FMT)
+		goto skip;
+
+	// Check for pixel format changes
+	switch (old_format)
+	{
+		case PEControl::RGB8_Z24:
+		case PEControl::Z24:
+			// Z24 and RGB8_Z24 are treated equal, so just return in this case
+			if (new_format == PEControl::RGB8_Z24 || new_format == PEControl::Z24)
+				goto skip;
+
+			if (new_format == PEControl::RGBA6_Z24)
+				convtype = 0;
+			else if (new_format == PEControl::RGB565_Z16)
+				convtype = 1;
+			break;
+
+		case PEControl::RGBA6_Z24:
+			if (new_format == PEControl::RGB8_Z24 ||
+				new_format == PEControl::Z24)
+				convtype = 2;
+			else if (new_format == PEControl::RGB565_Z16)
+				convtype = 3;
+			break;
+
+		case PEControl::RGB565_Z16:
+			if (new_format == PEControl::RGB8_Z24 ||
+				new_format == PEControl::Z24)
+				convtype = 4;
+			else if (new_format == PEControl::RGBA6_Z24)
+				convtype = 5;
+			break;
+
+		default:
+			break;
+	}
+
+	if (convtype == -1)
+	{
+		ERROR_LOG(VIDEO, "Unhandled EFB format change: %d to %d\n", static_cast<int>(old_format), static_cast<int>(new_format));
+		goto skip;
+	}
+
+	g_renderer->ReinterpretPixelData(convtype);
+
+skip:
+	DEBUG_LOG(VIDEO, "pixelfmt: pixel=%d, zc=%d", static_cast<int>(new_format), static_cast<int>(bpmem.zcontrol.zformat));
+
+	Renderer::StorePixelFormat(new_format);
+}
+
+void SetInterlacingMode(const BPCmd &bp)
+{
+	// TODO
+	switch (bp.address)
+	{
+	case BPMEM_FIELDMODE:
+		{
+			// SDK always sets bpmem.lineptwidth.lineaspect via BPMEM_LINEPTWIDTH
+			// just before this cmd
+			const char *action[] = { "don't adjust", "adjust" };
+			DEBUG_LOG(VIDEO, "BPMEM_FIELDMODE texLOD:%s lineaspect:%s",
+				action[bpmem.fieldmode.texLOD],
+				action[bpmem.lineptwidth.lineaspect]);
+		}
+		break;
+	case BPMEM_FIELDMASK:
+		{
+			// Determines if fields will be written to EFB (always computed)
+			const char *action[] = { "skip", "write" };
+			DEBUG_LOG(VIDEO, "BPMEM_FIELDMASK even:%s odd:%s",
+				action[bpmem.fieldmask.even], action[bpmem.fieldmask.odd]);
+		}
+		break;
+	default:
+		ERROR_LOG(VIDEO, "SetInterlacingMode default");
+		break;
+	}
+}
+
+};