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-rw-r--r--src/rops.c238
1 files changed, 238 insertions, 0 deletions
diff --git a/src/rops.c b/src/rops.c
new file mode 100644
index 0000000..e4eab04
--- /dev/null
+++ b/src/rops.c
@@ -0,0 +1,238 @@
+#include "snes9x.h"
+#include "ppu.h"
+#include "rops.h"
+
+ROPSTRUCT rops[MAX_ROPS];
+unsigned int ROpCount;
+
+void doRaster(ROPSTRUCT *rop) {
+ if (!rop) return;
+ switch (rop->rop) {
+ case ROP_NOP:
+ // NOP
+ break;
+ case ROP_FIXEDCOLOUR:
+ {
+ unsigned char col = rop->value & 0x1f;
+ // Colour data for fixed colour addition/subtraction
+ if (rop->value & 0x80) PPU.FixedColourBlue = col;
+ if (rop->value & 0x40) PPU.FixedColourGreen = col;
+ if (rop->value & 0x20) PPU.FixedColourRed = col;
+ }
+ break;
+ case ROP_PALETTE:
+ {
+ // Pallette, colors
+ unsigned char col = rop->value & 255;
+ IPPU.Blue[col] = (rop->value >> (16 + 10)) & 0x1f;
+ IPPU.Green[col] = (rop->value >> (16 + 5)) & 0x1f;
+ IPPU.Red[col] = (rop->value >> (16 + 0)) & 0x1f;
+ IPPU.ScreenColors[col] = (uint16) BUILD_PIXEL (IPPU.XB[IPPU.Red[col]], IPPU.XB[IPPU.Green[col]], IPPU.XB[IPPU.Blue[col]]);
+ IPPU.ColorsChanged = TRUE;
+ }
+ break;
+ case ROP_SCREEN_MODE:
+ // Screen mode (0 - 7), background tile sizes and background 3 priority
+ PPU.BG[0].BGSize = (rop->value >> 4) & 1;
+ PPU.BG[1].BGSize = (rop->value >> 5) & 1;
+ PPU.BG[2].BGSize = (rop->value >> 6) & 1;
+ PPU.BG[3].BGSize = (rop->value >> 7) & 1;
+ PPU.BGMode = rop->value & 7;
+ // BJ: BG3Priority only takes effect if BGMode==1 and the bit is set
+ PPU.BG3Priority = ((rop->value & 0x0f) == 0x09);
+ break;
+ case ROP_BRIGHTNESS:
+ PPU.Brightness = rop->value;
+ S9xFixColourBrightness();
+ if (PPU.Brightness > IPPU.MaxBrightness) IPPU.MaxBrightness = PPU.Brightness;
+ IPPU.ColorsChanged = TRUE;
+ IPPU.DirectColourMapsNeedRebuild = TRUE;
+ break;
+ case ROP_FORCE_BLANKING:
+ PPU.ForcedBlanking = rop->value;
+ IPPU.ColorsChanged = TRUE;
+ break;
+ case ROP_TILE_ADDRESS:
+ PPU.OBJNameBase = (rop->value & 3) << 14;
+ PPU.OBJNameSelect = ((rop->value >> 3) & 3) << 13;
+ PPU.OBJSizeSelect = (rop->value >> 5) & 7;
+ IPPU.OBJChanged = TRUE;
+ break;
+ case ROP_MOSAIC:
+ PPU.Mosaic = (rop->value >> 4) + 1;
+ PPU.BGMosaic[0] = (rop->value & 1) && PPU.Mosaic > 1;
+ PPU.BGMosaic[1] = (rop->value & 2) && PPU.Mosaic > 1;
+ PPU.BGMosaic[2] = (rop->value & 4) && PPU.Mosaic > 1;
+ PPU.BGMosaic[3] = (rop->value & 8) && PPU.Mosaic > 1;
+ break;
+ case ROP_BG_SCSIZE_SCBASE:
+ PPU.BG[rop->value >> 16].SCSize = rop->value & 3;
+ PPU.BG[rop->value >> 16].SCBase = (rop->value & 0x7c) << 8;
+ break;
+ case ROP_BG_NAMEBASE:
+ PPU.BG[(rop->value >> 16) + 0].NameBase = (rop->value & 7) << 12;
+ PPU.BG[(rop->value >> 16) + 1].NameBase = ((rop->value >> 4) & 7) << 12;
+ break;
+ case ROP_MODE7_ROTATION:
+ PPU.Mode7Repeat = rop->value >> 6;
+ if (PPU.Mode7Repeat == 1) PPU.Mode7Repeat = 0;
+ PPU.Mode7VFlip = (rop->value & 2) >> 1;
+ PPU.Mode7HFlip = rop->value & 1;
+ break;
+ case ROP_BG_WINDOW_ENABLE:
+ PPU.ClipWindow1Enable[(rop->value >> 16) + 0] = !!(rop->value & 0x02);
+ PPU.ClipWindow1Enable[(rop->value >> 16) + 1] = !!(rop->value & 0x20);
+ PPU.ClipWindow2Enable[(rop->value >> 16) + 0] = !!(rop->value & 0x08);
+ PPU.ClipWindow2Enable[(rop->value >> 16) + 1] = !!(rop->value & 0x80);
+ PPU.ClipWindow1Inside[(rop->value >> 16) + 0] = !(rop->value & 0x01);
+ PPU.ClipWindow1Inside[(rop->value >> 16) + 1] = !(rop->value & 0x10);
+ PPU.ClipWindow2Inside[(rop->value >> 16) + 0] = !(rop->value & 0x04);
+ PPU.ClipWindow2Inside[(rop->value >> 16) + 1] = !(rop->value & 0x40);
+ PPU.RecomputeClipWindows = TRUE;
+ break;
+ case ROP_WINDOW1_LEFT:
+ PPU.Window1Left = rop->value;
+ PPU.RecomputeClipWindows = TRUE;
+ break;
+ case ROP_WINDOW1_RIGHT:
+ PPU.Window1Right = rop->value;
+ PPU.RecomputeClipWindows = TRUE;
+ break;
+ case ROP_WINDOW2_LEFT:
+ PPU.Window2Left = rop->value;
+ PPU.RecomputeClipWindows = TRUE;
+ break;
+ case ROP_WINDOW2_RIGHT:
+ PPU.Window2Right = rop->value;
+ PPU.RecomputeClipWindows = TRUE;
+ break;
+ case ROP_BG_WINDOW_LOGIC:
+ PPU.ClipWindowOverlapLogic[0] = (rop->value & 0x03);
+ PPU.ClipWindowOverlapLogic[1] = (rop->value & 0x0c) >> 2;
+ PPU.ClipWindowOverlapLogic[2] = (rop->value & 0x30) >> 4;
+ PPU.ClipWindowOverlapLogic[3] = (rop->value & 0xc0) >> 6;
+ PPU.RecomputeClipWindows = TRUE;
+ break;
+ case ROP_OBJS_WINDOW_LOGIC:
+ PPU.ClipWindowOverlapLogic[4] = (rop->value & 0x03);
+ PPU.ClipWindowOverlapLogic[5] = (rop->value & 0x0c) >> 2;
+ PPU.RecomputeClipWindows = TRUE;
+ break;
+ case ROP_MAIN_SCREEN_DESIG:
+ // Main screen designation (backgrounds 1 - 4 and objects)
+ if ((GFX.r212c_s & GFX.r212e_s & 0x1f) != (GFX.r212e_s & rop->value & 0x1f)) PPU.RecomputeClipWindows = TRUE;
+ GFX.r212c_s = rop->value;
+ break;
+ case ROP_SUB_SCREEN_DESIG:
+ // Sub-screen designation (backgrounds 1 - 4 and objects)
+ if ((GFX.r212d_s & GFX.r212f_s & 0x1f) != (GFX.r212f_s & rop->value & 0x1f)) PPU.RecomputeClipWindows = TRUE;
+ GFX.r212d_s = rop->value;
+ break;
+ case ROP_MAIN_SCREEN_WMASK:
+ // Window mask designation for main screen ?
+ if ((GFX.r212c_s & GFX.r212e_s & 0x1f) != (GFX.r212c_s & rop->value & 0x1f)) PPU.RecomputeClipWindows = TRUE;
+ GFX.r212e_s = rop->value;
+ break;
+ case ROP_SUB_SCREEN_WMASK:
+ // Window mask designation for sub-sreen ?
+ if ((GFX.r212d_s & GFX.r212f_s & 0x1f) != (GFX.r212d_s & rop->value & 0x1f)) PPU.RecomputeClipWindows = TRUE;
+ GFX.r212f_s = rop->value;
+ break;
+ case ROP_FIXEDCOL_OR_SCREEN:
+ // Fixed colour addition or screen addition
+ if ((GFX.r2130_s & 0xf0) != (rop->value & 0xf0)) PPU.RecomputeClipWindows = TRUE;
+ GFX.r2130_s = rop->value;
+ break;
+ case ROP_ADD_OR_SUB_COLOR:
+ // Backgrounds 1 - 4, objects and backdrop colour add/sub enable
+ GFX.r2131_s = rop->value;
+ break;
+ }
+ rop->rop = 0; // Raster Operation already done, invalidate it
+}
+
+bool wouldRasterAlterStatus(ROPSTRUCT *rop) {
+ if (!rop) return false;
+ switch (rop->rop) {
+ case ROP_NOP:
+ return false;
+ break;
+ case ROP_FIXEDCOLOUR:
+ {
+ unsigned char col = rop->value & 0x1f;
+ // Colour data for fixed colour addition/subtraction
+ if ((rop->value & 0x80) && (PPU.FixedColourBlue != col)) return true;
+ if ((rop->value & 0x40) && (PPU.FixedColourGreen != col)) return true;
+ if ((rop->value & 0x20) && (PPU.FixedColourRed != col)) return true;
+ return false;
+ }
+ break;
+ case ROP_PALETTE:
+ return true;
+ break;
+ case ROP_SCREEN_MODE:
+ return true;
+ break;
+ case ROP_BRIGHTNESS:
+ return true;
+ break;
+ case ROP_FORCE_BLANKING:
+ return true;
+ break;
+ case ROP_TILE_ADDRESS:
+ return true;
+ break;
+ case ROP_MOSAIC:
+ return true;
+ break;
+ case ROP_BG_SCSIZE_SCBASE:
+ return true;
+ break;
+ case ROP_BG_NAMEBASE:
+ return true;
+ break;
+ case ROP_MODE7_ROTATION:
+ return true;
+ break;
+ case ROP_BG_WINDOW_ENABLE:
+ return true;
+ break;
+ case ROP_WINDOW1_LEFT:
+ return true;
+ break;
+ case ROP_WINDOW1_RIGHT:
+ return true;
+ break;
+ case ROP_WINDOW2_LEFT:
+ return true;
+ break;
+ case ROP_WINDOW2_RIGHT:
+ return true;
+ break;
+ case ROP_BG_WINDOW_LOGIC:
+ return true;
+ break;
+ case ROP_OBJS_WINDOW_LOGIC:
+ return true;
+ break;
+ case ROP_MAIN_SCREEN_DESIG:
+ return true;
+ break;
+ case ROP_SUB_SCREEN_DESIG:
+ return true;
+ break;
+ case ROP_MAIN_SCREEN_WMASK:
+ return true;
+ break;
+ case ROP_SUB_SCREEN_WMASK:
+ return true;
+ break;
+ case ROP_FIXEDCOL_OR_SCREEN:
+ return true;
+ break;
+ case ROP_ADD_OR_SUB_COLOR:
+ return true;
+ break;
+ }
+ return true;
+}
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