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lr-snes9x/gfx.cpp
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libretroadmin 67f61e333b Cleanups
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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
#include "snes9x.h"
#include "ppu.h"
#include "tile.h"
#include "controls.h"
#include "crosshairs.h"
#include "cheats.h"
#include "display.h"
#include <vector>
#include <string>
/* Extracted from SGFX so the struct stays C-visible for tile.c. */
static std::vector<uint16> GFXScreenBuffer;
std::string GFXInfoString;
/* tile.c-side bridges (C linkage): VRAM/FillRAM for the C tile renderer
without pulling memmap.h into C. Set in S9xGraphicsInit. */
extern "C" { uint8 *tile_VRAM; uint8 *tile_FillRAM;
uint8 TileMode7Hires = 0; uint8 TileMode7HiresBilinear = 0; }
extern struct SCheatData Cheat;
extern struct SLineData LineData[240];
extern struct SLineMatrixData LineMatrixData[240];
void S9xComputeClipWindows (void);
void (*S9xCustomDisplayString) (const char *, int, int, bool, int) = NULL;
static void SetupOBJ (void);
static void DrawOBJS (int);
static void DrawBackground (int, uint8, uint8);
static void DrawBackgroundMosaic (int, uint8, uint8);
static void DrawBackgroundOffset (int, uint8, uint8, int);
static void DrawBackgroundOffsetMosaic (int, uint8, uint8, int);
static inline void DrawBackgroundMode7 (int, void (*DrawMath) (uint32, uint32, int), void (*DrawNomath) (uint32, uint32, int), int);
static inline void DrawBackdrop (void);
static inline void RenderScreen (bool8);
static uint16 get_crosshair_color (uint8);
#define TILE_PLUS(t, x) (((t) & 0xfc00) | ((t + x) & 0x3ff))
bool8 S9xGraphicsInit (void)
{
S9xInitTileRenderer();
memset(BlackColourMap, 0, 256 * sizeof(uint16));
IPPU.OBJChanged = TRUE;
Settings.BG_Forced = 0;
Settings.ForcedBackdrop = 0;
S9xFixColourBrightness();
S9xBuildDirectColourMaps();
/* Buffers sized for the widest supported frame (Mode 7 hires 4x,
1024 px), snes9x2010's model: Pitch is the max buffer width and
RealPPL derives from it; narrower frames use the left part of each
row, and RenderedScreenWidth controls what the frontend sees. */
GFX.Pitch = sizeof(uint16) * MAX_SNES_WIDTH_4X;
GFX.RealPPL = MAX_SNES_WIDTH_4X;
GFX.ScreenSize = MAX_SNES_WIDTH_4X * MAX_SNES_HEIGHT;
tile_VRAM = Memory.VRAM;
tile_FillRAM = Memory.FillRAM;
GFXScreenBuffer.resize(MAX_SNES_WIDTH_4X * (MAX_SNES_HEIGHT + 64));
GFX.Screen = &GFXScreenBuffer[GFX.RealPPL * 32];
GFX.ZERO = (uint16 *) malloc(sizeof(uint16) * 0x10000);
GFX.SubScreen = (uint16 *) malloc(GFX.ScreenSize * sizeof(uint16));
GFX.ZBuffer = (uint8 *) malloc(GFX.ScreenSize);
GFX.SubZBuffer = (uint8 *) malloc(GFX.ScreenSize);
if (!GFX.ZERO || !GFX.SubScreen || !GFX.ZBuffer || !GFX.SubZBuffer)
{
S9xGraphicsDeinit();
return (FALSE);
}
// Lookup table for 1/2 color subtraction
memset(GFX.ZERO, 0, 0x10000 * sizeof(uint16));
for (uint32 r = 0; r <= MAX_RED; r++)
{
uint32 r2 = r;
if (r2 & 0x10)
r2 &= ~0x10;
else
r2 = 0;
for (uint32 g = 0; g <= MAX_GREEN; g++)
{
uint32 g2 = g;
if (g2 & GREEN_HI_BIT)
g2 &= ~GREEN_HI_BIT;
else
g2 = 0;
for (uint32 b = 0; b <= MAX_BLUE; b++)
{
uint32 b2 = b;
if (b2 & 0x10)
b2 &= ~0x10;
else
b2 = 0;
GFX.ZERO[BUILD_PIXEL2(r, g, b)] = BUILD_PIXEL2(r2, g2, b2);
GFX.ZERO[BUILD_PIXEL2(r, g, b) & ~ALPHA_BITS_MASK] = BUILD_PIXEL2(r2, g2, b2);
}
}
}
return (TRUE);
}
void S9xGraphicsDeinit (void)
{
if (GFX.ZERO) { free(GFX.ZERO); GFX.ZERO = NULL; }
if (GFX.SubScreen) { free(GFX.SubScreen); GFX.SubScreen = NULL; }
if (GFX.ZBuffer) { free(GFX.ZBuffer); GFX.ZBuffer = NULL; }
if (GFX.SubZBuffer) { free(GFX.SubZBuffer); GFX.SubZBuffer = NULL; }
}
void S9xGraphicsScreenResize (void)
{
IPPU.MaxBrightness = PPU.Brightness;
IPPU.Interlace = Memory.FillRAM[0x2133] & 1;
IPPU.InterlaceOBJ = Memory.FillRAM[0x2133] & 2;
IPPU.PseudoHires = Memory.FillRAM[0x2133] & 8;
{
/* From snes9x2010: the Mode7Hires option forces a wider frame when
it starts in Mode 7 so the M7 hires renderers have room to
write; 4x only for Mode 7 with the 4x setting. */
bool8 cond_1 = (PPU.BGMode == 5 || PPU.BGMode == 6 || IPPU.PseudoHires
|| (Settings.Mode7Hires && PPU.BGMode == 7));
bool8 cond_q = (PPU.BGMode == 7 && Settings.Mode7Hires == 4);
int width_factor = cond_q ? 4 : (cond_1 ? 2 : 1);
IPPU.DoubleWidthPixels = cond_1;
IPPU.QuadWidthPixels = cond_q;
IPPU.RenderedScreenWidth = SNES_WIDTH * width_factor;
/* M7 vertical-2x post-pass: arm when the frame starts in Mode 7
with hires + the vertical option; the whole frame gets
bilinear-Y at end of frame. Mid-frame Mode 7 entry currently
renders without the vertical pass (snes9x2010 additionally arms
from its mid-frame width-promotion hook; not ported yet). */
IPPU.M7VertStartY = (cond_1 && PPU.BGMode == 7 && Settings.Mode7HiresVertical) ? 0 : -1;
}
if (IPPU.Interlace)
{
GFX.PPL = GFX.RealPPL << 1;
IPPU.DoubleHeightPixels = TRUE;
IPPU.RenderedScreenHeight = PPU.ScreenHeight << 1;
GFX.DoInterlace++;
}
else
{
GFX.PPL = GFX.RealPPL;
IPPU.DoubleHeightPixels = FALSE;
IPPU.RenderedScreenHeight = PPU.ScreenHeight;
}
}
void S9xBuildDirectColourMaps (void)
{
IPPU.XB = mul_brightness[PPU.Brightness];
for (uint32 p = 0; p < 8; p++)
for (uint32 c = 0; c < 256; c++)
DirectColourMaps[p][c] = BUILD_PIXEL(IPPU.XB[((c & 7) << 2) | ((p & 1) << 1)], IPPU.XB[((c & 0x38) >> 1) | (p & 2)], IPPU.XB[((c & 0xc0) >> 3) | (p & 4)]);
}
void S9xStartScreenRefresh (void)
{
if (GFX.DoInterlace)
GFX.DoInterlace--;
if (IPPU.RenderThisFrame)
{
if (!GFX.DoInterlace || !S9xInterlaceField())
{
if (!S9xInitUpdate())
{
IPPU.RenderThisFrame = FALSE;
return;
}
S9xGraphicsScreenResize();
IPPU.RenderedFramesCount++;
}
PPU.MosaicStart = 0;
PPU.RecomputeClipWindows = TRUE;
IPPU.PreviousLine = IPPU.CurrentLine = 0;
memset(GFX.ZBuffer, 0, GFX.ScreenSize);
memset(GFX.SubZBuffer, 0, GFX.ScreenSize);
}
if (++IPPU.FrameCount == (uint32)Memory.ROMFramesPerSecond)
{
IPPU.DisplayedRenderedFrameCount = IPPU.RenderedFramesCount;
IPPU.RenderedFramesCount = 0;
IPPU.FrameCount = 0;
}
if (GFX.InfoStringTimeout > 0 && --GFX.InfoStringTimeout == 0)
GFXInfoString.clear();
IPPU.TotalEmulatedFrames++;
}
void S9xEndScreenRefresh (void)
{
if (IPPU.RenderThisFrame)
{
FLUSH_REDRAW();
/* Mode 7 vertical-2x post-pass: expand the frame to
PPU.ScreenHeight*2 rows in place before it is handed to the
frontend. No-op when M7VertStartY is -1. */
S9xMode7VertResample();
if (GFX.DoInterlace && S9xInterlaceField() == 0)
{
S9xControlEOF();
S9xContinueUpdate(IPPU.RenderedScreenWidth, IPPU.RenderedScreenHeight);
}
else
{
if (IPPU.ColorsChanged)
{
uint32 saved = PPU.CGDATA[0];
IPPU.ColorsChanged = FALSE;
PPU.CGDATA[0] = saved;
}
S9xControlEOF();
S9xDeinitUpdate(IPPU.RenderedScreenWidth, IPPU.RenderedScreenHeight);
}
}
else
S9xControlEOF();
S9xUpdateCheatsInMemory ();
#ifdef DEBUGGER
if (CPU.Flags & FRAME_ADVANCE_FLAG)
{
if (ICPU.FrameAdvanceCount)
{
ICPU.FrameAdvanceCount--;
IPPU.RenderThisFrame = TRUE;
IPPU.FrameSkip = 0;
}
else
{
CPU.Flags &= ~FRAME_ADVANCE_FLAG;
CPU.Flags |= DEBUG_MODE_FLAG;
}
}
#endif
if (CPU.SRAMModified)
{
if (!CPU.AutoSaveTimer)
{
if (!(CPU.AutoSaveTimer = Settings.AutoSaveDelay * Memory.ROMFramesPerSecond))
CPU.SRAMModified = FALSE;
}
else
{
if (!--CPU.AutoSaveTimer)
{
S9xAutoSaveSRAM();
CPU.SRAMModified = FALSE;
}
}
}
}
void RenderLine (uint8 C)
{
if (IPPU.RenderThisFrame)
{
LineData[C].BG[0].VOffset = PPU.BG[0].VOffset + 1;
LineData[C].BG[0].HOffset = PPU.BG[0].HOffset;
LineData[C].BG[1].VOffset = PPU.BG[1].VOffset + 1;
LineData[C].BG[1].HOffset = PPU.BG[1].HOffset;
if (PPU.BGMode == 7)
{
struct SLineMatrixData *p = &LineMatrixData[C];
p->MatrixA = PPU.MatrixA;
p->MatrixB = PPU.MatrixB;
p->MatrixC = PPU.MatrixC;
p->MatrixD = PPU.MatrixD;
p->CentreX = PPU.CentreX;
p->CentreY = PPU.CentreY;
p->M7HOFS = PPU.M7HOFS;
p->M7VOFS = PPU.M7VOFS;
}
else
{
LineData[C].BG[2].VOffset = PPU.BG[2].VOffset + 1;
LineData[C].BG[2].HOffset = PPU.BG[2].HOffset;
LineData[C].BG[3].VOffset = PPU.BG[3].VOffset + 1;
LineData[C].BG[3].HOffset = PPU.BG[3].HOffset;
}
IPPU.CurrentLine = C + 1;
}
else
{
// if we're not rendering this frame, we still need to update this
// XXX: Check ForceBlank? Or anything else?
if (IPPU.OBJChanged)
SetupOBJ();
PPU.RangeTimeOver |= GFX.OBJLines[C].RTOFlags;
}
}
static inline void RenderScreen (bool8 sub)
{
uint8 BGActive;
int D;
if (!sub)
{
GFX.S = GFX.Screen;
if (GFX.DoInterlace && S9xInterlaceField())
GFX.S += GFX.RealPPL;
GFX.DB = GFX.ZBuffer;
GFX.Clip = IPPU.Clip[0];
BGActive = Memory.FillRAM[0x212c] & ~Settings.BG_Forced;
D = 32;
}
else
{
GFX.S = GFX.SubScreen;
GFX.DB = GFX.SubZBuffer;
GFX.Clip = IPPU.Clip[1];
BGActive = Memory.FillRAM[0x212d] & ~Settings.BG_Forced;
D = (Memory.FillRAM[0x2130] & 2) << 4; // 'do math' depth flag
}
if (BGActive & 0x10)
{
BG.TileAddress = PPU.OBJNameBase;
BG.NameSelect = PPU.OBJNameSelect;
BG.EnableMath = !sub && (Memory.FillRAM[0x2131] & 0x10);
BG.StartPalette = 128;
S9xSelectTileConverter(4, FALSE, sub, FALSE);
S9xSelectTileRenderers(PPU.BGMode, sub, TRUE);
DrawOBJS(D + 4);
}
BG.NameSelect = 0;
S9xSelectTileRenderers(PPU.BGMode, sub, FALSE);
#define DO_BG(n, pal, depth, hires, offset, Zh, Zl, voffoff) \
if (BGActive & (1 << n)) \
{ \
BG.StartPalette = pal; \
BG.EnableMath = !sub && (Memory.FillRAM[0x2131] & (1 << n)); \
BG.TileSizeH = (!hires && PPU.BG[n].BGSize) ? 16 : 8; \
BG.TileSizeV = (PPU.BG[n].BGSize) ? 16 : 8; \
S9xSelectTileConverter(depth, hires, sub, PPU.BGMosaic[n]); \
\
if (offset) \
{ \
BG.OffsetSizeH = (!hires && PPU.BG[2].BGSize) ? 16 : 8; \
BG.OffsetSizeV = (PPU.BG[2].BGSize) ? 16 : 8; \
\
if (PPU.BGMosaic[n] && (hires || PPU.Mosaic > 1)) \
DrawBackgroundOffsetMosaic(n, D + Zh, D + Zl, voffoff); \
else \
DrawBackgroundOffset(n, D + Zh, D + Zl, voffoff); \
} \
else \
{ \
if (PPU.BGMosaic[n] && (hires || PPU.Mosaic > 1)) \
DrawBackgroundMosaic(n, D + Zh, D + Zl); \
else \
DrawBackground(n, D + Zh, D + Zl); \
} \
}
switch (PPU.BGMode)
{
case 0:
DO_BG(0, 0, 2, FALSE, FALSE, 15, 11, 0);
DO_BG(1, 32, 2, FALSE, FALSE, 14, 10, 0);
DO_BG(2, 64, 2, FALSE, FALSE, 7, 3, 0);
DO_BG(3, 96, 2, FALSE, FALSE, 6, 2, 0);
break;
case 1:
DO_BG(0, 0, 4, FALSE, FALSE, 15, 11, 0);
DO_BG(1, 0, 4, FALSE, FALSE, 14, 10, 0);
DO_BG(2, 0, 2, FALSE, FALSE, (PPU.BG3Priority ? 17 : 7), 3, 0);
break;
case 2:
DO_BG(0, 0, 4, FALSE, TRUE, 15, 7, 8);
DO_BG(1, 0, 4, FALSE, TRUE, 11, 3, 8);
break;
case 3:
DO_BG(0, 0, 8, FALSE, FALSE, 15, 7, 0);
DO_BG(1, 0, 4, FALSE, FALSE, 11, 3, 0);
break;
case 4:
DO_BG(0, 0, 8, FALSE, TRUE, 15, 7, 0);
DO_BG(1, 0, 2, FALSE, TRUE, 11, 3, 0);
break;
case 5:
DO_BG(0, 0, 4, TRUE, FALSE, 15, 7, 0);
DO_BG(1, 0, 2, TRUE, FALSE, 11, 3, 0);
break;
case 6:
DO_BG(0, 0, 4, TRUE, TRUE, 15, 7, 8);
break;
case 7:
if (BGActive & 0x01)
{
BG.EnableMath = !sub && (Memory.FillRAM[0x2131] & 1);
DrawBackgroundMode7(0, GFX.DrawMode7BG1Math, GFX.DrawMode7BG1Nomath, D);
}
if ((Memory.FillRAM[0x2133] & 0x40) && (BGActive & 0x02))
{
BG.EnableMath = !sub && (Memory.FillRAM[0x2131] & 2);
DrawBackgroundMode7(1, GFX.DrawMode7BG2Math, GFX.DrawMode7BG2Nomath, D);
}
break;
}
#undef DO_BG
BG.EnableMath = !sub && (Memory.FillRAM[0x2131] & 0x20);
DrawBackdrop();
}
void S9xUpdateScreen (void)
{
if (IPPU.OBJChanged || IPPU.InterlaceOBJ)
SetupOBJ();
// XXX: Check ForceBlank? Or anything else?
PPU.RangeTimeOver |= GFX.OBJLines[GFX.EndY].RTOFlags;
GFX.StartY = IPPU.PreviousLine;
if ((GFX.EndY = IPPU.CurrentLine - 1) >= PPU.ScreenHeight)
GFX.EndY = PPU.ScreenHeight - 1;
if (!PPU.ForcedBlanking)
{
// If force blank, may as well completely skip all this. We only did
// the OBJ because (AFAWK) the RTO flags are updated even during force-blank.
if (PPU.RecomputeClipWindows)
{
S9xComputeClipWindows();
PPU.RecomputeClipWindows = FALSE;
}
if (!IPPU.DoubleWidthPixels && (PPU.BGMode == 5 || PPU.BGMode == 6 || IPPU.PseudoHires
|| (Settings.Mode7Hires && PPU.BGMode == 7)))
{
// Mid-frame width promotion: the game switched into a hires
// mode (or Mode 7 with the hires option) partway down the
// frame, so rows already rendered at 1x must be widened in
// place. 4x only for Mode 7 with the 4x setting; from
// snes9x2010. This is the common path for Mode 7 games:
// HUDs render in another mode first, so frame start never
// sees BGMode == 7.
int factor = (PPU.BGMode == 7 && Settings.Mode7Hires == 4) ? 4 : 2;
// Have to back out of the regular speed hack
for (uint32 y = 0; y < GFX.StartY; y++)
{
uint16 *p = GFX.Screen + y * GFX.PPL + 255;
uint16 *q = GFX.Screen + y * GFX.PPL + 256 * factor - 1;
for (int x = 255; x >= 0; x--, p--)
for (int i = 0; i < factor; i++, q--)
*q = *p;
}
IPPU.DoubleWidthPixels = TRUE;
IPPU.QuadWidthPixels = (factor == 4);
IPPU.RenderedScreenWidth = SNES_WIDTH * factor;
// M7 vertical-2x post-pass: arm now if entering Mode 7
// mid-frame. Rows above GFX.StartY (HUD) get row-replicated
// by the post-pass; rows from here on get bilinear-Y.
if (PPU.BGMode == 7 && Settings.Mode7HiresVertical)
IPPU.M7VertStartY = (int32) GFX.StartY;
}
if (!IPPU.DoubleHeightPixels && IPPU.Interlace && (PPU.BGMode == 5 || PPU.BGMode == 6))
{
IPPU.DoubleHeightPixels = TRUE;
IPPU.RenderedScreenHeight = PPU.ScreenHeight << 1;
GFX.PPL = GFX.RealPPL << 1;
GFX.DoInterlace = 2;
for (int32 y = (int32) GFX.StartY - 2; y >= 0; y--)
memmove(GFX.Screen + (y + 1) * GFX.PPL, GFX.Screen + y * GFX.RealPPL, GFX.PPL * sizeof(uint16));
}
if ((Memory.FillRAM[0x2130] & 0x30) != 0x30 && (Memory.FillRAM[0x2131] & 0x3f))
GFX.FixedColour = BUILD_PIXEL(IPPU.XB[PPU.FixedColourRed], IPPU.XB[PPU.FixedColourGreen], IPPU.XB[PPU.FixedColourBlue]);
if (PPU.BGMode == 5 || PPU.BGMode == 6 || IPPU.PseudoHires ||
((Memory.FillRAM[0x2130] & 0x30) != 0x30 && (Memory.FillRAM[0x2130] & 2) && (Memory.FillRAM[0x2131] & 0x3f) && (Memory.FillRAM[0x212d] & 0x1f)))
// If hires (Mode 5/6 or pseudo-hires) or math is to be done
// involving the subscreen, then we need to render the subscreen...
RenderScreen(TRUE);
RenderScreen(FALSE);
}
else
{
const uint16 black = BUILD_PIXEL(0, 0, 0);
GFX.S = GFX.Screen + GFX.StartY * GFX.PPL;
if (GFX.DoInterlace && S9xInterlaceField())
GFX.S += GFX.RealPPL;
for (uint32 l = GFX.StartY; l <= GFX.EndY; l++, GFX.S += GFX.PPL)
for (int x = 0; x < IPPU.RenderedScreenWidth; x++)
GFX.S[x] = black;
}
IPPU.PreviousLine = IPPU.CurrentLine;
}
static void SetupOBJ (void)
{
int SmallWidth, SmallHeight, LargeWidth, LargeHeight;
switch (PPU.OBJSizeSelect)
{
case 0:
SmallWidth = SmallHeight = 8;
LargeWidth = LargeHeight = 16;
break;
case 1:
SmallWidth = SmallHeight = 8;
LargeWidth = LargeHeight = 32;
break;
case 2:
SmallWidth = SmallHeight = 8;
LargeWidth = LargeHeight = 64;
break;
case 3:
SmallWidth = SmallHeight = 16;
LargeWidth = LargeHeight = 32;
break;
case 4:
SmallWidth = SmallHeight = 16;
LargeWidth = LargeHeight = 64;
break;
case 5:
default:
SmallWidth = SmallHeight = 32;
LargeWidth = LargeHeight = 64;
break;
case 6:
SmallWidth = 16; SmallHeight = 32;
LargeWidth = 32; LargeHeight = 64;
break;
case 7:
SmallWidth = 16; SmallHeight = 32;
LargeWidth = LargeHeight = 32;
break;
}
int inc = IPPU.InterlaceOBJ ? 2 : 1;
int startline = (IPPU.InterlaceOBJ && S9xInterlaceField()) ? 1 : 0;
// OK, we have three cases here. Either there's no priority, priority is
// normal FirstSprite, or priority is FirstSprite+Y. The first two are
// easy, the last is somewhat more ... interesting. So we split them up.
int Height;
uint8 S;
int sprite_limit = (Settings.MaxSpriteTilesPerLine == 128) ? 128 : 32;
if (!PPU.OAMPriorityRotation || !(PPU.OAMFlip & PPU.OAMAddr & 1)) // normal case
{
uint8 LineOBJ[SNES_HEIGHT_EXTENDED];
memset(LineOBJ, 0, sizeof(LineOBJ));
for (int i = 0; i < SNES_HEIGHT_EXTENDED; i++)
{
GFX.OBJLines[i].RTOFlags = 0;
GFX.OBJLines[i].Tiles = Settings.MaxSpriteTilesPerLine;
for (int j = 0; j < sprite_limit; j++)
GFX.OBJLines[i].OBJ[j].Sprite = -1;
}
uint8 FirstSprite = PPU.FirstSprite;
S = FirstSprite;
do
{
if (PPU.OBJ[S].Size)
{
GFX.OBJWidths[S] = LargeWidth;
Height = LargeHeight;
}
else
{
GFX.OBJWidths[S] = SmallWidth;
Height = SmallHeight;
}
int HPos = PPU.OBJ[S].HPos;
if (HPos == -256)
HPos = 0;
if (HPos > -GFX.OBJWidths[S] && HPos <= 256)
{
if (HPos < 0)
GFX.OBJVisibleTiles[S] = (GFX.OBJWidths[S] + HPos + 7) >> 3;
else if (HPos + GFX.OBJWidths[S] > 255)
GFX.OBJVisibleTiles[S] = (256 - HPos + 7) >> 3;
else
GFX.OBJVisibleTiles[S] = GFX.OBJWidths[S] >> 3;
for (uint8 line = startline, Y = (uint8) (PPU.OBJ[S].VPos & 0xff); line < Height; Y++, line += inc)
{
if (Y >= SNES_HEIGHT_EXTENDED)
continue;
if (LineOBJ[Y] >= sprite_limit)
{
GFX.OBJLines[Y].RTOFlags |= 0x40;
continue;
}
GFX.OBJLines[Y].Tiles -= GFX.OBJVisibleTiles[S];
if (GFX.OBJLines[Y].Tiles < 0)
GFX.OBJLines[Y].RTOFlags |= 0x80;
GFX.OBJLines[Y].OBJ[LineOBJ[Y]].Sprite = S;
if (PPU.OBJ[S].VFlip)
// Yes, Width not Height. It so happens that the
// sprites with H=2*W flip as two WxW sprites.
GFX.OBJLines[Y].OBJ[LineOBJ[Y]].Line = line ^ (GFX.OBJWidths[S] - 1);
else
GFX.OBJLines[Y].OBJ[LineOBJ[Y]].Line = line;
LineOBJ[Y]++;
}
}
S = (S + 1) & 0x7f;
} while (S != FirstSprite);
for (int Y = 1; Y < SNES_HEIGHT_EXTENDED; Y++)
GFX.OBJLines[Y].RTOFlags |= GFX.OBJLines[Y - 1].RTOFlags;
}
else // evil FirstSprite+Y case
{
// First, find out which sprites are on which lines
uint8 OBJOnLine[SNES_HEIGHT_EXTENDED][128];
// memset(OBJOnLine, 0, sizeof(OBJOnLine));
/* Hold on here, that's a lot of bytes to initialise at once!
* So we only initialise them per line, as needed. [Neb]
* Bonus: We can quickly avoid looping if a line has no OBJs.
*/
bool8 AnyOBJOnLine[SNES_HEIGHT_EXTENDED];
memset(AnyOBJOnLine, FALSE, sizeof(AnyOBJOnLine)); // better
for (S = 0; S < 128; S++)
{
if (PPU.OBJ[S].Size)
{
GFX.OBJWidths[S] = LargeWidth;
Height = LargeHeight;
}
else
{
GFX.OBJWidths[S] = SmallWidth;
Height = SmallHeight;
}
int HPos = PPU.OBJ[S].HPos;
if (HPos == -256)
HPos = 256;
if (HPos > -GFX.OBJWidths[S] && HPos <= 256)
{
if (HPos < 0)
GFX.OBJVisibleTiles[S] = (GFX.OBJWidths[S] + HPos + 7) >> 3;
else if (HPos + GFX.OBJWidths[S] >= 257)
GFX.OBJVisibleTiles[S] = (257 - HPos + 7) >> 3;
else
GFX.OBJVisibleTiles[S] = GFX.OBJWidths[S] >> 3;
for (uint8 line = startline, Y = (uint8) (PPU.OBJ[S].VPos & 0xff); line < Height; Y++, line += inc)
{
if (Y >= SNES_HEIGHT_EXTENDED)
continue;
if (!AnyOBJOnLine[Y]) {
memset(OBJOnLine[Y], 0, sizeof(OBJOnLine[Y]));
AnyOBJOnLine[Y] = TRUE;
}
if (PPU.OBJ[S].VFlip)
// Yes, Width not Height. It so happens that the
// sprites with H=2*W flip as two WxW sprites.
OBJOnLine[Y][S] = (line ^ (GFX.OBJWidths[S] - 1)) | 0x80;
else
OBJOnLine[Y][S] = line | 0x80;
}
}
}
// Now go through and pull out those OBJ that are actually visible.
int j;
for (int Y = 0; Y < SNES_HEIGHT_EXTENDED; Y++)
{
GFX.OBJLines[Y].RTOFlags = Y ? GFX.OBJLines[Y - 1].RTOFlags : 0;
GFX.OBJLines[Y].Tiles = Settings.MaxSpriteTilesPerLine;
uint8 FirstSprite = (PPU.FirstSprite + Y) & 0x7f;
S = FirstSprite;
j = 0;
if (AnyOBJOnLine[Y])
{
do
{
if (OBJOnLine[Y][S])
{
if (j >= sprite_limit)
{
GFX.OBJLines[Y].RTOFlags |= 0x40;
break;
}
GFX.OBJLines[Y].Tiles -= GFX.OBJVisibleTiles[S];
if (GFX.OBJLines[Y].Tiles < 0)
GFX.OBJLines[Y].RTOFlags |= 0x80;
GFX.OBJLines[Y].OBJ[j].Sprite = S;
GFX.OBJLines[Y].OBJ[j++].Line = OBJOnLine[Y][S] & ~0x80;
}
S = (S + 1) & 0x7f;
} while (S != FirstSprite);
}
if (j < sprite_limit)
GFX.OBJLines[Y].OBJ[j].Sprite = -1;
}
}
IPPU.OBJChanged = FALSE;
}
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC push_options
#pragma GCC optimize ("no-tree-vrp")
#endif
static void DrawOBJS (int D)
{
void (*DrawTile) (uint32, uint32, uint32, uint32) = NULL;
void (*DrawClippedTile) (uint32, uint32, uint32, uint32, uint32, uint32) = NULL;
int PixWidth = IPPU.QuadWidthPixels ? 4 : (IPPU.DoubleWidthPixels ? 2 : 1);
BG.InterlaceLine = S9xInterlaceField() ? 8 : 0;
GFX.Z1 = 2;
int sprite_limit = (Settings.MaxSpriteTilesPerLine == 128) ? 128 : 32;
for (uint32 Y = GFX.StartY, Offset = Y * GFX.PPL; Y <= GFX.EndY; Y++, Offset += GFX.PPL)
{
int I = 0;
int tiles = GFX.OBJLines[Y].Tiles;
for (int S = GFX.OBJLines[Y].OBJ[I].Sprite; S >= 0 && I < sprite_limit; S = GFX.OBJLines[Y].OBJ[++I].Sprite)
{
tiles += GFX.OBJVisibleTiles[S];
if (tiles <= 0)
continue;
int BaseTile = (((GFX.OBJLines[Y].OBJ[I].Line << 1) + (PPU.OBJ[S].Name & 0xf0)) & 0xf0) | (PPU.OBJ[S].Name & 0x100) | (PPU.OBJ[S].Palette << 10);
int TileX = PPU.OBJ[S].Name & 0x0f;
int TileLine = (GFX.OBJLines[Y].OBJ[I].Line & 7) * 8;
int TileInc = 1;
if (PPU.OBJ[S].HFlip)
{
TileX = (TileX + (GFX.OBJWidths[S] >> 3) - 1) & 0x0f;
BaseTile |= H_FLIP;
TileInc = -1;
}
GFX.Z2 = D + PPU.OBJ[S].Priority * 4;
int DrawMode = 3;
int clip = 0, next_clip = -1000;
int X = PPU.OBJ[S].HPos;
if (X == -256)
X = 256;
for (int t = tiles, O = Offset + X * PixWidth; X <= 256 && X < PPU.OBJ[S].HPos + GFX.OBJWidths[S]; TileX = (TileX + TileInc) & 0x0f, X += 8, O += 8 * PixWidth)
{
if (X < -7 || --t < 0 || X == 256)
continue;
for (int x = X; x < X + 8;)
{
if (x >= next_clip)
{
for (; clip < GFX.Clip[4].Count && GFX.Clip[4].Left[clip] <= x; clip++) ;
if (clip == 0 || x >= GFX.Clip[4].Right[clip - 1])
{
DrawMode = 0;
next_clip = ((clip < GFX.Clip[4].Count) ? GFX.Clip[4].Left[clip] : 1000);
}
else
{
DrawMode = GFX.Clip[4].DrawMode[clip - 1];
next_clip = GFX.Clip[4].Right[clip - 1];
GFX.ClipColors = !(DrawMode & 1);
if (BG.EnableMath && (PPU.OBJ[S].Palette & 4) && (DrawMode & 2))
{
DrawTile = GFX.DrawTileMath;
DrawClippedTile = GFX.DrawClippedTileMath;
}
else
{
DrawTile = GFX.DrawTileNomath;
DrawClippedTile = GFX.DrawClippedTileNomath;
}
}
}
if (x == X && x + 8 < next_clip)
{
if (DrawMode)
DrawTile(BaseTile | TileX, O, TileLine, 1);
x += 8;
}
else
{
int w = (next_clip <= X + 8) ? next_clip - x : X + 8 - x;
if (DrawMode)
DrawClippedTile(BaseTile | TileX, O, x - X, w, TileLine, 1);
x += w;
}
}
}
}
}
}
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC pop_options
#endif
static void DrawBackground (int bg, uint8 Zh, uint8 Zl)
{
BG.TileAddress = PPU.BG[bg].NameBase << 1;
uint32 Tile;
uint16 *SC0, *SC1, *SC2, *SC3;
SC0 = (uint16 *) &Memory.VRAM[PPU.BG[bg].SCBase << 1];
SC1 = (PPU.BG[bg].SCSize & 1) ? SC0 + 1024 : SC0;
if (SC1 >= (uint16 *) (Memory.VRAM + 0x10000))
SC1 -= 0x8000;
SC2 = (PPU.BG[bg].SCSize & 2) ? SC1 + 1024 : SC0;
if (SC2 >= (uint16 *) (Memory.VRAM + 0x10000))
SC2 -= 0x8000;
SC3 = (PPU.BG[bg].SCSize & 1) ? SC2 + 1024 : SC2;
if (SC3 >= (uint16 *) (Memory.VRAM + 0x10000))
SC3 -= 0x8000;
uint32 Lines;
int OffsetMask = (BG.TileSizeH == 16) ? 0x3ff : 0x1ff;
int OffsetShift = (BG.TileSizeV == 16) ? 4 : 3;
int PixWidth = IPPU.QuadWidthPixels ? 4 : (IPPU.DoubleWidthPixels ? 2 : 1);
bool8 HiresInterlace = IPPU.Interlace && IPPU.DoubleWidthPixels;
void (*DrawTile) (uint32, uint32, uint32, uint32);
void (*DrawClippedTile) (uint32, uint32, uint32, uint32, uint32, uint32);
for (int clip = 0; clip < GFX.Clip[bg].Count; clip++)
{
GFX.ClipColors = !(GFX.Clip[bg].DrawMode[clip] & 1);
if (BG.EnableMath && (GFX.Clip[bg].DrawMode[clip] & 2))
{
DrawTile = GFX.DrawTileMath;
DrawClippedTile = GFX.DrawClippedTileMath;
}
else
{
DrawTile = GFX.DrawTileNomath;
DrawClippedTile = GFX.DrawClippedTileNomath;
}
for (uint32 Y = GFX.StartY; Y <= GFX.EndY; Y += Lines)
{
uint32 Y2 = HiresInterlace ? Y * 2 + S9xInterlaceField() : Y;
uint32 VOffset = LineData[Y].BG[bg].VOffset + (HiresInterlace ? 1 : 0);
uint32 HOffset = LineData[Y].BG[bg].HOffset;
int VirtAlign = ((Y2 + VOffset) & 7) >> (HiresInterlace ? 1 : 0);
for (Lines = 1; Lines < GFX.LinesPerTile - VirtAlign; Lines++)
{
if ((VOffset != LineData[Y + Lines].BG[bg].VOffset) || (HOffset != LineData[Y + Lines].BG[bg].HOffset))
break;
}
if (Y + Lines > GFX.EndY)
Lines = GFX.EndY - Y + 1;
VirtAlign <<= 3;
uint32 t1, t2;
uint32 TilemapRow = (VOffset + Y2) >> OffsetShift;
BG.InterlaceLine = ((VOffset + Y2) & 1) << 3;
if ((VOffset + Y2) & 8)
{
t1 = 16;
t2 = 0;
}
else
{
t1 = 0;
t2 = 16;
}
uint16 *b1, *b2;
if (TilemapRow & 0x20)
{
b1 = SC2;
b2 = SC3;
}
else
{
b1 = SC0;
b2 = SC1;
}
b1 += (TilemapRow & 0x1f) << 5;
b2 += (TilemapRow & 0x1f) << 5;
uint32 Left = GFX.Clip[bg].Left[clip];
uint32 Right = GFX.Clip[bg].Right[clip];
uint32 Offset = Left * PixWidth + Y * GFX.PPL;
uint32 HPos = (HOffset + Left) & OffsetMask;
uint32 HTile = HPos >> 3;
uint16 *t;
if (BG.TileSizeH == 8)
{
if (HTile > 31)
t = b2 + (HTile & 0x1f);
else
t = b1 + HTile;
}
else
{
if (HTile > 63)
t = b2 + ((HTile >> 1) & 0x1f);
else
t = b1 + (HTile >> 1);
}
uint32 Width = Right - Left;
if (HPos & 7)
{
uint32 l = HPos & 7;
uint32 w = 8 - l;
if (w > Width)
w = Width;
Offset -= l * PixWidth;
Tile = READ_WORD(t);
GFX.Z1 = GFX.Z2 = (Tile & 0x2000) ? Zh : Zl;
if (BG.TileSizeV == 16)
Tile = TILE_PLUS(Tile, ((Tile & V_FLIP) ? t2 : t1));
if (BG.TileSizeH == 8)
{
DrawClippedTile(Tile, Offset, l, w, VirtAlign, Lines);
t++;
if (HTile == 31)
t = b2;
else
if (HTile == 63)
t = b1;
}
else
{
if (!(Tile & H_FLIP))
DrawClippedTile(TILE_PLUS(Tile, (HTile & 1)), Offset, l, w, VirtAlign, Lines);
else
DrawClippedTile(TILE_PLUS(Tile, 1 - (HTile & 1)), Offset, l, w, VirtAlign, Lines);
t += HTile & 1;
if (HTile == 63)
t = b2;
else
if (HTile == 127)
t = b1;
}
HTile++;
Offset += 8 * PixWidth;
Width -= w;
}
while (Width >= 8)
{
Tile = READ_WORD(t);
GFX.Z1 = GFX.Z2 = (Tile & 0x2000) ? Zh : Zl;
if (BG.TileSizeV == 16)
Tile = TILE_PLUS(Tile, ((Tile & V_FLIP) ? t2 : t1));
if (BG.TileSizeH == 8)
{
DrawTile(Tile, Offset, VirtAlign, Lines);
t++;
if (HTile == 31)
t = b2;
else
if (HTile == 63)
t = b1;
}
else
{
if (!(Tile & H_FLIP))
DrawTile(TILE_PLUS(Tile, (HTile & 1)), Offset, VirtAlign, Lines);
else
DrawTile(TILE_PLUS(Tile, 1 - (HTile & 1)), Offset, VirtAlign, Lines);
t += HTile & 1;
if (HTile == 63)
t = b2;
else
if (HTile == 127)
t = b1;
}
HTile++;
Offset += 8 * PixWidth;
Width -= 8;
}
if (Width)
{
Tile = READ_WORD(t);
GFX.Z1 = GFX.Z2 = (Tile & 0x2000) ? Zh : Zl;
if (BG.TileSizeV == 16)
Tile = TILE_PLUS(Tile, ((Tile & V_FLIP) ? t2 : t1));
if (BG.TileSizeH == 8)
DrawClippedTile(Tile, Offset, 0, Width, VirtAlign, Lines);
else
{
if (!(Tile & H_FLIP))
DrawClippedTile(TILE_PLUS(Tile, (HTile & 1)), Offset, 0, Width, VirtAlign, Lines);
else
DrawClippedTile(TILE_PLUS(Tile, 1 - (HTile & 1)), Offset, 0, Width, VirtAlign, Lines);
}
}
}
}
}
static void DrawBackgroundMosaic (int bg, uint8 Zh, uint8 Zl)
{
BG.TileAddress = PPU.BG[bg].NameBase << 1;
uint32 Tile;
uint16 *SC0, *SC1, *SC2, *SC3;
SC0 = (uint16 *) &Memory.VRAM[PPU.BG[bg].SCBase << 1];
SC1 = (PPU.BG[bg].SCSize & 1) ? SC0 + 1024 : SC0;
if (SC1 >= (uint16 *) (Memory.VRAM + 0x10000))
SC1 -= 0x8000;
SC2 = (PPU.BG[bg].SCSize & 2) ? SC1 + 1024 : SC0;
if (SC2 >= (uint16 *) (Memory.VRAM + 0x10000))
SC2 -= 0x8000;
SC3 = (PPU.BG[bg].SCSize & 1) ? SC2 + 1024 : SC2;
if (SC3 >= (uint16 *) (Memory.VRAM + 0x10000))
SC3 -= 0x8000;
int Lines;
int OffsetMask = (BG.TileSizeH == 16) ? 0x3ff : 0x1ff;
int OffsetShift = (BG.TileSizeV == 16) ? 4 : 3;
int PixWidth = IPPU.QuadWidthPixels ? 4 : (IPPU.DoubleWidthPixels ? 2 : 1);
bool8 HiresInterlace = IPPU.Interlace && IPPU.DoubleWidthPixels;
void (*DrawPix) (uint32, uint32, uint32, uint32, uint32, uint32);
int MosaicStart = ((uint32) GFX.StartY - PPU.MosaicStart) % PPU.Mosaic;
for (int clip = 0; clip < GFX.Clip[bg].Count; clip++)
{
GFX.ClipColors = !(GFX.Clip[bg].DrawMode[clip] & 1);
if (BG.EnableMath && (GFX.Clip[bg].DrawMode[clip] & 2))
DrawPix = GFX.DrawMosaicPixelMath;
else
DrawPix = GFX.DrawMosaicPixelNomath;
for (uint32 Y = GFX.StartY - MosaicStart; Y <= GFX.EndY; Y += PPU.Mosaic)
{
uint32 Y2 = HiresInterlace ? Y * 2 : Y;
uint32 VOffset = LineData[Y + MosaicStart].BG[bg].VOffset + (HiresInterlace ? 1 : 0);
uint32 HOffset = LineData[Y + MosaicStart].BG[bg].HOffset;
Lines = PPU.Mosaic - MosaicStart;
if (Y + MosaicStart + Lines > GFX.EndY)
Lines = GFX.EndY - Y - MosaicStart + 1;
int VirtAlign = (((Y2 + VOffset) & 7) >> (HiresInterlace ? 1 : 0)) << 3;
uint32 t1, t2;
uint32 TilemapRow = (VOffset + Y2) >> OffsetShift;
BG.InterlaceLine = ((VOffset + Y2) & 1) << 3;
if ((VOffset + Y2) & 8)
{
t1 = 16;
t2 = 0;
}
else
{
t1 = 0;
t2 = 16;
}
uint16 *b1, *b2;
if (TilemapRow & 0x20)
{
b1 = SC2;
b2 = SC3;
}
else
{
b1 = SC0;
b2 = SC1;
}
b1 += (TilemapRow & 0x1f) << 5;
b2 += (TilemapRow & 0x1f) << 5;
uint32 Left = GFX.Clip[bg].Left[clip];
uint32 Right = GFX.Clip[bg].Right[clip];
uint32 Offset = Left * PixWidth + (Y + MosaicStart) * GFX.PPL;
uint32 HPos = (HOffset + Left - (Left % PPU.Mosaic)) & OffsetMask;
uint32 HTile = HPos >> 3;
uint16 *t;
if (BG.TileSizeH == 8)
{
if (HTile > 31)
t = b2 + (HTile & 0x1f);
else
t = b1 + HTile;
}
else
{
if (HTile > 63)
t = b2 + ((HTile >> 1) & 0x1f);
else
t = b1 + (HTile >> 1);
}
uint32 Width = Right - Left;
HPos &= 7;
while (Left < Right)
{
uint32 w = PPU.Mosaic - (Left % PPU.Mosaic);
if (w > Width)
w = Width;
Tile = READ_WORD(t);
GFX.Z1 = GFX.Z2 = (Tile & 0x2000) ? Zh : Zl;
if (BG.TileSizeV == 16)
Tile = TILE_PLUS(Tile, ((Tile & V_FLIP) ? t2 : t1));
if (BG.TileSizeH == 8)
DrawPix(Tile, Offset, VirtAlign, HPos & 7, w, Lines);
else
{
if (!(Tile & H_FLIP))
DrawPix(TILE_PLUS(Tile, (HTile & 1)), Offset, VirtAlign, HPos & 7, w, Lines);
else
DrawPix(TILE_PLUS(Tile, 1 - (HTile & 1)), Offset, VirtAlign, HPos & 7, w, Lines);
}
HPos += PPU.Mosaic;
while (HPos >= 8)
{
HPos -= 8;
if (BG.TileSizeH == 8)
{
t++;
if (HTile == 31)
t = b2;
else
if (HTile == 63)
t = b1;
}
else
{
t += HTile & 1;
if (HTile == 63)
t = b2;
else
if (HTile == 127)
t = b1;
}
HTile++;
}
Offset += w * PixWidth;
Width -= w;
Left += w;
}
MosaicStart = 0;
}
}
}
static void DrawBackgroundOffset (int bg, uint8 Zh, uint8 Zl, int VOffOff)
{
BG.TileAddress = PPU.BG[bg].NameBase << 1;
uint32 Tile;
uint16 *SC0, *SC1, *SC2, *SC3;
uint16 *BPS0, *BPS1, *BPS2, *BPS3;
BPS0 = (uint16 *) &Memory.VRAM[PPU.BG[2].SCBase << 1];
BPS1 = (PPU.BG[2].SCSize & 1) ? BPS0 + 1024 : BPS0;
if (BPS1 >= (uint16 *) (Memory.VRAM + 0x10000))
BPS1 -= 0x8000;
BPS2 = (PPU.BG[2].SCSize & 2) ? BPS1 + 1024 : BPS0;
if (BPS2 >= (uint16 *) (Memory.VRAM + 0x10000))
BPS2 -= 0x8000;
BPS3 = (PPU.BG[2].SCSize & 1) ? BPS2 + 1024 : BPS2;
if (BPS3 >= (uint16 *) (Memory.VRAM + 0x10000))
BPS3 -= 0x8000;
SC0 = (uint16 *) &Memory.VRAM[PPU.BG[bg].SCBase << 1];
SC1 = (PPU.BG[bg].SCSize & 1) ? SC0 + 1024 : SC0;
if (SC1 >= (uint16 *) (Memory.VRAM + 0x10000))
SC1 -= 0x8000;
SC2 = (PPU.BG[bg].SCSize & 2) ? SC1 + 1024 : SC0;
if (SC2 >= (uint16 *) (Memory.VRAM + 0x10000))
SC2 -= 0x8000;
SC3 = (PPU.BG[bg].SCSize & 1) ? SC2 + 1024 : SC2;
if (SC3 >= (uint16 *) (Memory.VRAM + 0x10000))
SC3 -= 0x8000;
int OffsetMask = (BG.TileSizeH == 16) ? 0x3ff : 0x1ff;
int OffsetShift = (BG.TileSizeV == 16) ? 4 : 3;
int Offset2Mask = (BG.OffsetSizeH == 16) ? 0x3ff : 0x1ff;
int Offset2Shift = (BG.OffsetSizeV == 16) ? 4 : 3;
int OffsetEnableMask = 0x2000 << bg;
int PixWidth = IPPU.QuadWidthPixels ? 4 : (IPPU.DoubleWidthPixels ? 2 : 1);
bool8 HiresInterlace = IPPU.Interlace && IPPU.DoubleWidthPixels;
void (*DrawClippedTile) (uint32, uint32, uint32, uint32, uint32, uint32);
for (int clip = 0; clip < GFX.Clip[bg].Count; clip++)
{
GFX.ClipColors = !(GFX.Clip[bg].DrawMode[clip] & 1);
if (BG.EnableMath && (GFX.Clip[bg].DrawMode[clip] & 2))
{
DrawClippedTile = GFX.DrawClippedTileMath;
}
else
{
DrawClippedTile = GFX.DrawClippedTileNomath;
}
for (uint32 Y = GFX.StartY; Y <= GFX.EndY; Y++)
{
uint32 Y2 = HiresInterlace ? Y * 2 + S9xInterlaceField() : Y;
uint32 VOff = LineData[Y].BG[2].VOffset - 1;
uint32 HOff = LineData[Y].BG[2].HOffset;
uint32 HOffsetRow = VOff >> Offset2Shift;
uint32 VOffsetRow = (VOff + VOffOff) >> Offset2Shift;
uint16 *s, *s1, *s2;
if (HOffsetRow & 0x20)
{
s1 = BPS2;
s2 = BPS3;
}
else
{
s1 = BPS0;
s2 = BPS1;
}
s1 += (HOffsetRow & 0x1f) << 5;
s2 += (HOffsetRow & 0x1f) << 5;
s = ((VOffsetRow & 0x20) ? BPS2 : BPS0) + ((VOffsetRow & 0x1f) << 5);
int32 VOffsetOffset = s - s1;
uint32 Left = GFX.Clip[bg].Left[clip];
uint32 Right = GFX.Clip[bg].Right[clip];
uint32 Offset = Left * PixWidth + Y * GFX.PPL;
uint32 HScroll = LineData[Y].BG[bg].HOffset;
bool8 left_edge = (Left < (8 - (HScroll & 7)));
uint32 Width = Right - Left;
while (Left < Right)
{
uint32 VOffset, HOffset;
if (left_edge)
{
// SNES cannot do OPT for leftmost tile column
VOffset = LineData[Y].BG[bg].VOffset;
HOffset = HScroll;
left_edge = FALSE;
}
else
{
int HOffTile = ((HOff + Left - 1) & Offset2Mask) >> 3;
if (BG.OffsetSizeH == 8)
{
if (HOffTile > 31)
s = s2 + (HOffTile & 0x1f);
else
s = s1 + HOffTile;
}
else
{
if (HOffTile > 63)
s = s2 + ((HOffTile >> 1) & 0x1f);
else
s = s1 + (HOffTile >> 1);
}
uint16 HCellOffset = READ_WORD(s);
uint16 VCellOffset;
if (VOffOff)
VCellOffset = READ_WORD(s + VOffsetOffset);
else
{
if (HCellOffset & 0x8000)
{
VCellOffset = HCellOffset;
HCellOffset = 0;
}
else
VCellOffset = 0;
}
if (VCellOffset & OffsetEnableMask)
VOffset = VCellOffset + 1;
else
VOffset = LineData[Y].BG[bg].VOffset;
if (HCellOffset & OffsetEnableMask)
HOffset = (HCellOffset & ~7) | (HScroll & 7);
else
HOffset = HScroll;
}
if (HiresInterlace)
VOffset++;
uint32 t1, t2;
int VirtAlign = (((Y2 + VOffset) & 7) >> (HiresInterlace ? 1 : 0)) << 3;
int TilemapRow = (VOffset + Y2) >> OffsetShift;
BG.InterlaceLine = ((VOffset + Y2) & 1) << 3;
if ((VOffset + Y2) & 8)
{
t1 = 16;
t2 = 0;
}
else
{
t1 = 0;
t2 = 16;
}
uint16 *b1, *b2;
if (TilemapRow & 0x20)
{
b1 = SC2;
b2 = SC3;
}
else
{
b1 = SC0;
b2 = SC1;
}
b1 += (TilemapRow & 0x1f) << 5;
b2 += (TilemapRow & 0x1f) << 5;
uint32 HPos = (HOffset + Left) & OffsetMask;
uint32 HTile = HPos >> 3;
uint16 *t;
if (BG.TileSizeH == 8)
{
if (HTile > 31)
t = b2 + (HTile & 0x1f);
else
t = b1 + HTile;
}
else
{
if (HTile > 63)
t = b2 + ((HTile >> 1) & 0x1f);
else
t = b1 + (HTile >> 1);
}
uint32 l = HPos & 7;
uint32 w = 8 - l;
if (w > Width)
w = Width;
Offset -= l * PixWidth;
Tile = READ_WORD(t);
GFX.Z1 = GFX.Z2 = (Tile & 0x2000) ? Zh : Zl;
if (BG.TileSizeV == 16)
Tile = TILE_PLUS(Tile, ((Tile & V_FLIP) ? t2 : t1));
if (BG.TileSizeH == 8)
{
DrawClippedTile(Tile, Offset, l, w, VirtAlign, 1);
}
else
{
if (!(Tile & H_FLIP))
DrawClippedTile(TILE_PLUS(Tile, (HTile & 1)), Offset, l, w, VirtAlign, 1);
else
DrawClippedTile(TILE_PLUS(Tile, 1 - (HTile & 1)), Offset, l, w, VirtAlign, 1);
}
Left += w;
Offset += 8 * PixWidth;
Width -= w;
}
}
}
}
static void DrawBackgroundOffsetMosaic (int bg, uint8 Zh, uint8 Zl, int VOffOff)
{
BG.TileAddress = PPU.BG[bg].NameBase << 1;
uint32 Tile;
uint16 *SC0, *SC1, *SC2, *SC3;
uint16 *BPS0, *BPS1, *BPS2, *BPS3;
BPS0 = (uint16 *) &Memory.VRAM[PPU.BG[2].SCBase << 1];
BPS1 = (PPU.BG[2].SCSize & 1) ? BPS0 + 1024 : BPS0;
if (BPS1 >= (uint16 *) (Memory.VRAM + 0x10000))
BPS1 -= 0x8000;
BPS2 = (PPU.BG[2].SCSize & 2) ? BPS1 + 1024 : BPS0;
if (BPS2 >= (uint16 *) (Memory.VRAM + 0x10000))
BPS2 -= 0x8000;
BPS3 = (PPU.BG[2].SCSize & 1) ? BPS2 + 1024 : BPS2;
if (BPS3 >= (uint16 *) (Memory.VRAM + 0x10000))
BPS3 -= 0x8000;
SC0 = (uint16 *) &Memory.VRAM[PPU.BG[bg].SCBase << 1];
SC1 = (PPU.BG[bg].SCSize & 1) ? SC0 + 1024 : SC0;
if (SC1 >= (uint16 *) (Memory.VRAM + 0x10000))
SC1 -= 0x8000;
SC2 = (PPU.BG[bg].SCSize & 2) ? SC1 + 1024 : SC0;
if (SC2 >= (uint16 *) (Memory.VRAM + 0x10000))
SC2 -= 0x8000;
SC3 = (PPU.BG[bg].SCSize & 1) ? SC2 + 1024 : SC2;
if (SC3 >= (uint16 *) (Memory.VRAM + 0x10000))
SC3 -= 0x8000;
int Lines;
int OffsetMask = (BG.TileSizeH == 16) ? 0x3ff : 0x1ff;
int OffsetShift = (BG.TileSizeV == 16) ? 4 : 3;
int Offset2Shift = (BG.OffsetSizeV == 16) ? 4 : 3;
int OffsetEnableMask = 0x2000 << bg;
int PixWidth = IPPU.QuadWidthPixels ? 4 : (IPPU.DoubleWidthPixels ? 2 : 1);
bool8 HiresInterlace = IPPU.Interlace && IPPU.DoubleWidthPixels;
void (*DrawPix) (uint32, uint32, uint32, uint32, uint32, uint32);
int MosaicStart = ((uint32) GFX.StartY - PPU.MosaicStart) % PPU.Mosaic;
for (int clip = 0; clip < GFX.Clip[bg].Count; clip++)
{
GFX.ClipColors = !(GFX.Clip[bg].DrawMode[clip] & 1);
if (BG.EnableMath && (GFX.Clip[bg].DrawMode[clip] & 2))
DrawPix = GFX.DrawMosaicPixelMath;
else
DrawPix = GFX.DrawMosaicPixelNomath;
for (uint32 Y = GFX.StartY - MosaicStart; Y <= GFX.EndY; Y += PPU.Mosaic)
{
uint32 Y2 = HiresInterlace ? Y * 2 : Y;
uint32 VOff = LineData[Y + MosaicStart].BG[2].VOffset - 1;
uint32 HOff = LineData[Y + MosaicStart].BG[2].HOffset;
Lines = PPU.Mosaic - MosaicStart;
if (Y + MosaicStart + Lines > GFX.EndY)
Lines = GFX.EndY - Y - MosaicStart + 1;
uint32 HOffsetRow = VOff >> Offset2Shift;
uint32 VOffsetRow = (VOff + VOffOff) >> Offset2Shift;
uint16 *s, *s1, *s2;
if (HOffsetRow & 0x20)
{
s1 = BPS2;
s2 = BPS3;
}
else
{
s1 = BPS0;
s2 = BPS1;
}
s1 += (HOffsetRow & 0x1f) << 5;
s2 += (HOffsetRow & 0x1f) << 5;
s = ((VOffsetRow & 0x20) ? BPS2 : BPS0) + ((VOffsetRow & 0x1f) << 5);
int32 VOffsetOffset = s - s1;
uint32 Left = GFX.Clip[bg].Left[clip];
uint32 Right = GFX.Clip[bg].Right[clip];
uint32 Offset = Left * PixWidth + (Y + MosaicStart) * GFX.PPL;
uint32 HScroll = LineData[Y + MosaicStart].BG[bg].HOffset;
uint32 Width = Right - Left;
while (Left < Right)
{
uint32 VOffset, HOffset;
if (Left < (8 - (HScroll & 7)))
{
// SNES cannot do OPT for leftmost tile column
VOffset = LineData[Y + MosaicStart].BG[bg].VOffset;
HOffset = HScroll;
}
else
{
int HOffTile = (((Left + (HScroll & 7)) - 8) + (HOff & ~7)) >> 3;
if (BG.OffsetSizeH == 8)
{
if (HOffTile > 31)
s = s2 + (HOffTile & 0x1f);
else
s = s1 + HOffTile;
}
else
{
if (HOffTile > 63)
s = s2 + ((HOffTile >> 1) & 0x1f);
else
s = s1 + (HOffTile >> 1);
}
uint16 HCellOffset = READ_WORD(s);
uint16 VCellOffset;
if (VOffOff)
VCellOffset = READ_WORD(s + VOffsetOffset);
else
{
if (HCellOffset & 0x8000)
{
VCellOffset = HCellOffset;
HCellOffset = 0;
}
else
VCellOffset = 0;
}
if (VCellOffset & OffsetEnableMask)
VOffset = VCellOffset + 1;
else
VOffset = LineData[Y + MosaicStart].BG[bg].VOffset;
if (HCellOffset & OffsetEnableMask)
HOffset = (HCellOffset & ~7) | (HScroll & 7);
else
HOffset = HScroll;
}
if (HiresInterlace)
VOffset++;
uint32 t1, t2;
int VirtAlign = (((Y2 + VOffset) & 7) >> (HiresInterlace ? 1 : 0)) << 3;
int TilemapRow = (VOffset + Y2) >> OffsetShift;
BG.InterlaceLine = ((VOffset + Y2) & 1) << 3;
if ((VOffset + Y2) & 8)
{
t1 = 16;
t2 = 0;
}
else
{
t1 = 0;
t2 = 16;
}
uint16 *b1, *b2;
if (TilemapRow & 0x20)
{
b1 = SC2;
b2 = SC3;
}
else
{
b1 = SC0;
b2 = SC1;
}
b1 += (TilemapRow & 0x1f) << 5;
b2 += (TilemapRow & 0x1f) << 5;
uint32 HPos = (HOffset + Left - (Left % PPU.Mosaic)) & OffsetMask;
uint32 HTile = HPos >> 3;
uint16 *t;
if (BG.TileSizeH == 8)
{
if (HTile > 31)
t = b2 + (HTile & 0x1f);
else
t = b1 + HTile;
}
else
{
if (HTile > 63)
t = b2 + ((HTile >> 1) & 0x1f);
else
t = b1 + (HTile >> 1);
}
uint32 w = PPU.Mosaic - (Left % PPU.Mosaic);
if (w > Width)
w = Width;
Tile = READ_WORD(t);
GFX.Z1 = GFX.Z2 = (Tile & 0x2000) ? Zh : Zl;
if (BG.TileSizeV == 16)
Tile = TILE_PLUS(Tile, ((Tile & V_FLIP) ? t2 : t1));
if (BG.TileSizeH == 8)
DrawPix(Tile, Offset, VirtAlign, HPos & 7, w, Lines);
else
{
if (!(Tile & H_FLIP))
DrawPix(TILE_PLUS(Tile, (HTile & 1)), Offset, VirtAlign, HPos & 7, w, Lines);
else
if (!(Tile & V_FLIP))
DrawPix(TILE_PLUS(Tile, 1 - (HTile & 1)), Offset, VirtAlign, HPos & 7, w, Lines);
}
Left += w;
Offset += w * PixWidth;
Width -= w;
}
MosaicStart = 0;
}
}
}
static inline void DrawBackgroundMode7 (int bg, void (*DrawMath) (uint32, uint32, int), void (*DrawNomath) (uint32, uint32, int), int D)
{
/* The C tile renderer samples Mode 7 through de-interleaved
tilemap/graphics planes (Mode7TileMap/Mode7Gfx in tile.c); refresh
them from current VRAM before sampling, exactly where snes9x2010's
caller does. VRAM is VBlank-stable across a frame's Mode 7
rendering, so one snapshot covers every clip segment below. */
S9xMode7DeinterleaveVRAM();
for (int clip = 0; clip < GFX.Clip[bg].Count; clip++)
{
GFX.ClipColors = !(GFX.Clip[bg].DrawMode[clip] & 1);
if (BG.EnableMath && (GFX.Clip[bg].DrawMode[clip] & 2))
DrawMath(GFX.Clip[bg].Left[clip], GFX.Clip[bg].Right[clip], D);
else
DrawNomath(GFX.Clip[bg].Left[clip], GFX.Clip[bg].Right[clip], D);
}
}
static inline void DrawBackdrop (void)
{
uint32 Offset = GFX.StartY * GFX.PPL;
/* The C tile renderer's backdrop functions derive ScreenColors from
RealScreenColors per call (ClipColors ? BlackColourMap :
RealScreenColors), matching snes9x2010's caller contract where the
caller sets RealScreenColors first. The old tileimpl backdrop read
GFX.ScreenColors set by earlier tile draws instead, so on a frame
where the backdrop draws first RealScreenColors was still NULL. */
GFX.RealScreenColors = IPPU.ScreenColors;
for (int clip = 0; clip < GFX.Clip[5].Count; clip++)
{
GFX.ClipColors = !(GFX.Clip[5].DrawMode[clip] & 1);
if (BG.EnableMath && (GFX.Clip[5].DrawMode[clip] & 2))
GFX.DrawBackdropMath(Offset, GFX.Clip[5].Left[clip], GFX.Clip[5].Right[clip]);
else
GFX.DrawBackdropNomath(Offset, GFX.Clip[5].Left[clip], GFX.Clip[5].Right[clip]);
}
}
static uint16 get_crosshair_color (uint8 color)
{
switch (color & 15)
{
case 0: return (BUILD_PIXEL( 0, 0, 0)); // transparent, shouldn't be used
case 1: return (BUILD_PIXEL( 0, 0, 0)); // Black
case 2: return (BUILD_PIXEL( 8, 8, 8)); // 25Grey
case 3: return (BUILD_PIXEL(16, 16, 16)); // 50Grey
case 4: return (BUILD_PIXEL(23, 23, 23)); // 75Grey
case 5: return (BUILD_PIXEL(31, 31, 31)); // White
case 6: return (BUILD_PIXEL(31, 0, 0)); // Red
case 7: return (BUILD_PIXEL(31, 16, 0)); // Orange
case 8: return (BUILD_PIXEL(31, 31, 0)); // Yellow
case 9: return (BUILD_PIXEL( 0, 31, 0)); // Green
case 10: return (BUILD_PIXEL( 0, 31, 31)); // Cyan
case 11: return (BUILD_PIXEL( 0, 23, 31)); // Sky
case 12: return (BUILD_PIXEL( 0, 0, 31)); // Blue
case 13: return (BUILD_PIXEL(23, 0, 31)); // Violet
case 14: return (BUILD_PIXEL(31, 0, 31)); // Magenta
case 15: return (BUILD_PIXEL(31, 0, 16)); // Purple
}
return (0);
}
void S9xDrawCrosshair (const char *crosshair, uint8 fgcolor, uint8 bgcolor, int16 x, int16 y)
{
if (!crosshair)
return;
int16 r, rx = 1, c, cx = 1, W = SNES_WIDTH, H = PPU.ScreenHeight;
uint16 fg, bg;
x -= 7;
y -= 7;
if (IPPU.QuadWidthPixels) { cx = 4; x *= 4; W *= 4; }
else if (IPPU.DoubleWidthPixels) { cx = 2; x *= 2; W *= 2; }
if (IPPU.DoubleHeightPixels) { rx = 2; y *= 2; H *= 2; }
fg = get_crosshair_color(fgcolor);
bg = get_crosshair_color(bgcolor);
uint16 *s = GFX.Screen + y * (int32)GFX.RealPPL + x;
for (r = 0; r < 15 * rx; r++, s += GFX.RealPPL - 15 * cx)
{
if (y + r < 0)
{
s += 15 * cx;
continue;
}
if (y + r >= H)
break;
for (c = 0; c < 15 * cx; c++, s++)
{
if (x + c < 0 || s < GFX.Screen)
continue;
if (x + c >= W)
{
s += 15 * cx - c;
break;
}
uint8 p = crosshair[(r / rx) * 15 + (c / cx)];
if (p == '#' && fgcolor)
*s = (fgcolor & 0x10) ? COLOR_ADD::fn1_2(fg, *s) : fg;
else
if (p == '.' && bgcolor)
*s = (bgcolor & 0x10) ? COLOR_ADD::fn1_2(*s, bg) : bg;
}
}
}
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