o add bsnes

2009-04-08 21:29:36 +02:00
parent bcb4a055e9
commit 27b58a09f2
413 changed files with 71887 additions and 0 deletions
--- a/bsnes/ppu/bppu/bppu_render_windows.cpp
+++ b/bsnes/ppu/bppu/bppu_render_windows.cpp
@@ -0,0 +1,99 @@
+#ifdef BPPU_CPP
+
+void bPPU::build_window_table(uint8 bg, bool mainscreen) {
+  uint8  set = 1, clr = 0;
+  uint8 *wtbl = (mainscreen == true) ? window[bg].main : window[bg].sub;
+
+  if(bg != COL) {
+    if(mainscreen == true && regs.window_enabled[bg] == false) {
+      memset(wtbl, 0, 256);
+      return;
+    }
+    if(mainscreen == false && regs.sub_window_enabled[bg] == false) {
+      memset(wtbl, 0, 256);
+      return;
+    }
+  } else {
+    switch((mainscreen == true) ? regs.color_mask : regs.colorsub_mask) {
+      case 0: {  //always
+        memset(wtbl, 1, 256);
+      } return;
+
+      case 3: {  //never
+        memset(wtbl, 0, 256);
+      } return;
+
+      case 1: {  //inside window only
+        set = 1;
+        clr = 0;
+      } break;
+
+      case 2: {  //outside window only
+        set = 0;
+        clr = 1;
+      } break;
+    }
+  }
+
+  uint16 window1_left  = regs.window1_left;
+  uint16 window1_right = regs.window1_right;
+  uint16 window2_left  = regs.window2_left;
+  uint16 window2_right = regs.window2_right;
+
+  if(regs.window1_enabled[bg] == false && regs.window2_enabled[bg] == false) {
+    memset(wtbl, clr, 256);
+    return;
+  }
+
+  if(regs.window1_enabled[bg] == true && regs.window2_enabled[bg] == false) {
+    if(regs.window1_invert[bg] == true)swap(set, clr);
+    for(int x = 0; x < 256; x++) {
+      wtbl[x] = (x >= window1_left && x <= window1_right) ? set : clr;
+    }
+    return;
+  }
+
+  if(regs.window1_enabled[bg] == false && regs.window2_enabled[bg] == true) {
+    if(regs.window2_invert[bg] == true)swap(set, clr);
+    for(int x = 0; x < 256; x++) {
+      wtbl[x] = (x >= window2_left && x <= window2_right) ? set : clr;
+    }
+    return;
+  }
+
+  //(regs.window1_enabled[bg] == true && regs.window2_enabled[bg] == true)
+  int w1_mask, w2_mask;  //1 = masked, 0 = not masked
+
+  for(int x = 0; x < 256; x++) {
+    w1_mask = (x >= window1_left && x <= window1_right);
+    if(regs.window1_invert[bg] == true)w1_mask = !w1_mask;
+
+    w2_mask = (x >= window2_left && x <= window2_right);
+    if(regs.window2_invert[bg] == true)w2_mask = !w2_mask;
+
+    switch(regs.window_mask[bg]) {
+      case 0: {  //WINDOWMASK_OR:
+        wtbl[x] = ((w1_mask | w2_mask) == 1) ? set : clr;
+      } break;
+
+      case 1: {  //WINDOWMASK_AND:
+        wtbl[x] = ((w1_mask & w2_mask) == 1) ? set : clr;
+      } break;
+
+      case 2: {  //WINDOWMASK_XOR:
+        wtbl[x] = ((w1_mask ^ w2_mask) == 1) ? set : clr;
+      } break;
+
+      case 3: {  //WINDOWMASK_XNOR:
+        wtbl[x] = ((w1_mask ^ w2_mask) == 0) ? set : clr;
+      } break;
+    }
+  }
+}
+
+void bPPU::build_window_tables(uint8 bg) {
+  build_window_table(bg, true);
+  build_window_table(bg, false);
+}
+
+#endif  //ifdef BPPU_CPP