port: implement fisheye

src/game/bondview.c

@@ -563,6 +563,24 @@ f32 bview0f142d74(s32 arg0, f32 arg1, f32 arg2, f32 arg3)
 	return result;
 }
 
+#ifndef PLATFORM_N64
+
+static inline Gfx *bviewDrawFisheyeLine(Gfx *gdl, s32 viewleft, s32 viewwidth, s32 y, f32 scale)
+{
+	const f32 orighalfw = viewwidth * 0.5f;
+	const f32 xcenter = viewleft + orighalfw;
+	const f32 halfw = orighalfw * scale;
+	const s32 left = xcenter - halfw;
+	const s32 right = xcenter + halfw;
+	gSPImageRectangleEXT(gdl++,
+		left << 2, y << 2, viewleft, y,
+		right << 2, (y + 1) << 2, viewleft + viewwidth, y + 1,
+		0, videoGetNativeWidth(), videoGetNativeHeight());
+	return gdl;
+}
+
+#endif
+
 /**
  * Draw the fisheye curved effect when using an eyespy.
  *
@@ -677,6 +695,12 @@ Gfx *bviewDrawFisheye(Gfx *gdl, u32 colour, u32 alpha, s32 shuttertime60, s8 sta
 
 	gdl = bviewPrepareStaticRgba16(gdl, colour, alpha);
 
+#ifndef PLATFORM_N64
+	// make a copy of the current back buffer contents that we will be using as a texture
+	gDPCopyFramebufferEXT(gdl++, g_PrevFrameFb, 0, 0, 0, G_ON);
+	gDPSetFramebufferTextureEXT(gdl++, 0, 0, 0, g_PrevFrameFb);
+#endif
+
 	if (starting) {
 		for (i = viewtop; i < viewtop + viewheight; i++) {
 			if (i % 2) {
@@ -684,7 +708,11 @@ Gfx *bviewDrawFisheye(Gfx *gdl, u32 colour, u32 alpha, s32 shuttertime60, s8 sta
 					gDPSetEnvColorViaWord(gdl++, (colour & 0xffffff00) | (spec & 0xff));
 
 					tmp = bview0f142d74(s2, f26, halfheight, sqhalfheight) * startupfrac;
+#ifdef PLATFORM_N64
 					gdl = bviewCopyPixels(gdl, fb, i, 5, i, tmp, viewleft, viewwidth);
+#else
+					gdl = bviewDrawFisheyeLine(gdl, viewleft, viewwidth, i, tmp);
+#endif
 				}
 			}
 
@@ -710,13 +738,21 @@ Gfx *bviewDrawFisheye(Gfx *gdl, u32 colour, u32 alpha, s32 shuttertime60, s8 sta
 			}
 
 			tmp = bview0f142d74(s2, f26, halfheight, sqhalfheight) * f22;
+#ifdef PLATFORM_N64
 			gdl = bviewCopyPixels(gdl, fb, i, 5, i, tmp, viewleft, viewwidth);
+#else
+			gdl = bviewDrawFisheyeLine(gdl, viewleft, viewwidth, i, tmp);
+#endif
 
 			if (hit == EYESPYHIT_DAMAGE) {
 				gDPSetEnvColorViaWord(gdl++, 0xddaaaa99);
 
 				tmp = bview0f142d74(s2, f26, halfheight, sqhalfheight) * 1.03f;
+#ifdef PLATFORM_N64
 				gdl = bviewCopyPixels(gdl, fb, i, 5, i, tmp, viewleft, viewwidth);
+#else
+				gdl = bviewDrawFisheyeLine(gdl, viewleft, viewwidth, i, tmp);
+#endif
 			}
 
 			s2 += s3;

src/game/chr.c

@@ -6426,7 +6426,7 @@ Gfx *chrRenderCloak(Gfx *gdl, struct prop *chrprop, struct prop *thisprop)
 						gDPPipeSync(gdl++);
 						gSPTextureRectangle(gdl++, 0, 0, 60, 60, G_TX_RENDERTILE, 0, 0, 4096, 1024);
 #else
-						gDPCopyFramebufferEXT(gdl++, var8009ccc0[index], 0, uls, ult);
+						gDPCopyFramebufferEXT(gdl++, var8009ccc0[index], 0, uls, ult, G_ON);
 						gDPSetTile(gdl++, G_IM_FMT_RGBA, G_IM_SIZ_16b,
 							((((lrs - uls + 1) * G_IM_SIZ_16b_BYTES)+7)>>3), 0, 0, 0,
 							G_TX_NOMIRROR | G_TX_WRAP, 4, G_TX_NOLOD,

src/include/gbiex.h

@@ -213,12 +213,13 @@
 #define gDPSetFramebufferTextureEXT(pkt, f, s, w, i) \
     gSetImage(pkt, G_SETTIMG_FB_EXT, f, s, w, i)
 
-#define gDPCopyFramebufferEXT(pkt, dst, src, uls, ult)         \
+#define gDPCopyFramebufferEXT(pkt, dst, src, uls, ult, back)   \
 {                                                              \
     Gfx *_g = (Gfx *)(pkt);                                    \
                                                                \
     _g->words.w0 = _SHIFTL(G_COPYFB_EXT, 24, 8)                \
-        | _SHIFTL(dst, 12, 12) | _SHIFTL(src, 0, 12);          \
+        | _SHIFTL(dst, 11, 11) | _SHIFTL(src, 0, 11) |         \
+          _SHIFTL(back, 22, 1);                                \
     _g->words.w1 = _SHIFTL(uls, 16, 16) | _SHIFTL(ult, 0, 16); \
 }