add dormant anaglyph code

skyfloogle · Apr 14, 2024 · 754362d · 754362d
1 parent 30f7949
commit 754362d
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Showing 7 changed files with 41 additions and 12 deletions.
diff --git a/include/vb_gui.h b/include/vb_gui.h
@@ -62,6 +62,7 @@ extern Thread save_thread;
 
 bool guiShouldPause();
 void toggleVsync(bool enable);
+void toggleAnaglyph(bool enable, bool also_update_vsync);
 void aptBacklight(APT_HookType hook, void* param);
 int guiGetInput(bool do_switching);
 

diff --git a/include/vb_set.h b/include/vb_set.h
@@ -80,6 +80,7 @@ typedef struct VB_OPT {
     bool  PERF_INFO;
     bool  VSYNC;
     bool  N3DS_SPEEDUP;
+    bool  ANAGLYPH;
 } VB_OPT;
 
 void setDefaults(void);

diff --git a/source/3ds/gui_hard.c b/source/3ds/gui_hard.c
@@ -1381,11 +1381,11 @@ void toggleVsync(bool enable) {
     u32 vtotal_top, vtotal_bottom;
     if (enable) {
         // 990 is closer to 50Hz but capture cards don't like when the two screens are out of sync
-        vtotal_top = old_2ds ? 494 : 989;
+        vtotal_top = old_2ds || tVBOpt.ANAGLYPH ? 494 : 989;
         vtotal_bottom = 494;
         startPeriodicVsync(frame_pacer_thread);
     } else {
-        vtotal_top = old_2ds ? 413 : 827;
+        vtotal_top = old_2ds || tVBOpt.ANAGLYPH ? 413 : 827;
         vtotal_bottom = 413;
         startPeriodic(frame_pacer_thread, 20000000);
     }
@@ -1407,6 +1407,21 @@ void toggleVsync(bool enable) {
     GSPGPU_WriteHWRegs(0x400524, &vtotal_bottom, 4);
 }
 
+void toggleAnaglyph(bool enable, bool also_update_vsync) {
+    tVBOpt.ANAGLYPH = enable;
+    gfxSet3D(!enable);
+    if (!also_update_vsync) return;
+    // updating 3d mode resets VTotal, so turn off VSync in advance to fix the cache
+    toggleVsync(false);
+    // push 1 frame and wait for VBlank to reset VTotal
+    C3D_FrameBegin(0);
+    video_flush(true);
+    C3D_FrameEnd(0);
+    gspWaitForVBlank();
+    // re-enable VSync if applicable
+    toggleVsync(tVBOpt.VSYNC);
+}
+
 void aptBacklight(APT_HookType hook, void* param) {
     if (hook == APTHOOK_ONSLEEP && !inMenu) {
         // don't save if we saved in the last 10 secs (unsure if this works)

diff --git a/source/3ds/main.c b/source/3ds/main.c
@@ -67,6 +67,8 @@ int main() {
 
     replay_init();
 
+    toggleAnaglyph(tVBOpt.ANAGLYPH, false);
+
     guiop = 0;
     openMenu();
     if (guiop & GUIEXIT) {

diff --git a/source/3ds/video.c b/source/3ds/video.c
@@ -225,7 +225,7 @@ void video_render(int alt_buf) {
 	AttrInfo_AddLoader(attrInfo, 0, GPU_SHORT, 4);
 	AttrInfo_AddLoader(attrInfo, 1, GPU_SHORT, 3);
 
-	eye_count = CONFIG_3D_SLIDERSTATE > 0.0f ? 2 : 1;
+	eye_count = tVBOpt.ANAGLYPH || CONFIG_3D_SLIDERSTATE > 0.0f ? 2 : 1;
 
 	if (tVIPREG.XPCTRL & 0x0002) {
 		if (tDSPCACHE.CharCacheInvalid) {
@@ -323,31 +323,35 @@ void video_flush(bool default_for_both) {
 
 	C3D_TexEnv *env = C3D_GetTexEnv(0);
 	C3D_TexEnvInit(env);
-	C3D_TexEnvColor(env, tVBOpt.TINT);
+	C3D_TexEnvColor(env, tVBOpt.ANAGLYPH ? 0xff0000ff : tVBOpt.TINT);
 	C3D_TexEnvSrc(env, C3D_RGB, GPU_TEXTURE0, GPU_CONSTANT, 0);
 	C3D_TexEnvFunc(env, C3D_RGB, GPU_MODULATE);
 	C3D_TexEnvSrc(env, C3D_Alpha, GPU_CONSTANT, 0, 0);
+	env = C3D_GetTexEnv(1);
 	if (minRepeat != maxRepeat) {
-		env = C3D_GetTexEnv(1);
 		C3D_TexEnvInit(env);
 		C3D_TexEnvSrc(env, C3D_Both, GPU_PREVIOUS, GPU_TEXTURE1, 0);
 		C3D_TexEnvFunc(env, C3D_Both, GPU_MODULATE);
 		#ifdef COLTABLESCALE
 		C3D_TexEnvScale(env, C3D_RGB, maxRepeat <= 2 ? maxRepeat - 1 : GPU_TEVSCALE_4);
 		#endif
 	} else {
-		env = C3D_GetTexEnv(1);
 		C3D_TexEnvInit(env);
 	}
 
 	int viewportX = (TOP_SCREEN_WIDTH - VIEWPORT_WIDTH) / 2;
 	int viewportY = (TOP_SCREEN_HEIGHT - VIEWPORT_HEIGHT) / 2;
 
 	for (int dst_eye = 0; dst_eye < (default_for_both ? 2 : eye_count); dst_eye++) {
-		int src_eye = default_for_both ? orig_eye : CONFIG_3D_SLIDERSTATE == 0 ? tVBOpt.DEFAULT_EYE : dst_eye;
+		int src_eye = default_for_both ? orig_eye : !tVBOpt.ANAGLYPH && CONFIG_3D_SLIDERSTATE == 0 ? tVBOpt.DEFAULT_EYE : dst_eye;
+		if (tVBOpt.ANAGLYPH && src_eye) {
+			C3D_TexEnvColor(C3D_GetTexEnv(0), 0xffffff00);
+			C3D_AlphaBlend(GPU_BLEND_ADD, 0, GPU_ONE, GPU_ONE, 0, 0);
+		}
 		float depthOffset = getDepthOffset(default_for_both, dst_eye, tVBOpt.SLIDERMODE);
-		C3D_RenderTargetClear(finalScreen[dst_eye], C3D_CLEAR_ALL, 0, 0);
-		C3D_FrameDrawOn(finalScreen[dst_eye]);
+		C3D_RenderTarget *target = finalScreen[dst_eye && !tVBOpt.ANAGLYPH];
+		C3D_RenderTargetClear(target, C3D_CLEAR_ALL, 0, 0);
+		C3D_FrameDrawOn(target);
 		C3D_SetViewport(viewportY, viewportX+depthOffset, VIEWPORT_HEIGHT, VIEWPORT_WIDTH);
 		C3D_TexBind(1, &columnTableTexture[src_eye]);
 		C3D_ImmDrawBegin(GPU_GEOMETRY_PRIM);
@@ -357,10 +361,16 @@ void video_flush(bool default_for_both) {
 		C3D_ImmSendAttrib(384.0 / 512, (src_eye ? 0.5 : 0) + 224.0 / 512, 0, 0);
 		C3D_ImmDrawEnd();
 	}
+
+	if (tVBOpt.ANAGLYPH) {
+		C3D_AlphaBlend(GPU_BLEND_ADD, GPU_BLEND_ADD, GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA, GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA);
+	}
 
 	if (minRepeat != maxRepeat) {
-		env = C3D_GetTexEnv(1);
-		C3D_TexEnvInit(env);
+		C3D_TexEnvInit(C3D_GetTexEnv(1));
+	}
+	if (tVBOpt.ANAGLYPH) {
+		for (int i = 2; i <= 4; i++) C3D_TexEnvInit(C3D_GetTexEnv(i));
 	}
 }
 

diff --git a/source/3ds/video_hard.c b/source/3ds/video_hard.c
@@ -149,7 +149,6 @@ void video_hard_init() {
 	C3D_ColorLogicOp(GPU_LOGICOP_COPY);
 
 	C3D_DepthTest(false, GPU_ALWAYS, GPU_WRITE_ALL);
-	C3D_AlphaTest(true, GPU_GREATER, 0);
 
 	vbuf = linearAlloc(sizeof(vertex) * VBUF_SIZE);
 	avbuf = linearAlloc(sizeof(avertex) * AVBUF_SIZE);

diff --git a/source/common/vb_set.c b/source/common/vb_set.c
@@ -49,6 +49,7 @@ void setDefaults(void) {
     tVBOpt.ROM_PATH = NULL;
     tVBOpt.VSYNC = true;
     tVBOpt.N3DS_SPEEDUP = true;
+    tVBOpt.ANAGLYPH = false;
 
     // Default keys
 #ifdef __3DS__