Implement osViRepeatLine

N64Recomp · Jun 10, 2024 · 71e299a · 71e299a
1 parent 835c14b
commit 71e299a
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Showing 3 changed files with 30 additions and 5 deletions.
diff --git a/librecomp/src/vi.cpp b/librecomp/src/vi.cpp
@@ -17,6 +17,10 @@ extern "C" void osViBlack_recomp(uint8_t* rdram, recomp_context* ctx) {
     osViBlack((uint32_t)ctx->r4);
 }
 
+extern "C" void osViRepeatLine_recomp(uint8_t* rdram, recomp_context* ctx) {
+    osViRepeatLine((uint32_t)ctx->r4);
+}
+
 extern "C" void osViSetSpecialFeatures_recomp(uint8_t* rdram, recomp_context* ctx) {
     osViSetSpecialFeatures((uint32_t)ctx->r4);
 }

diff --git a/ultramodern/include/ultramodern/ultra64.h b/ultramodern/include/ultramodern/ultra64.h
@@ -284,6 +284,7 @@ void osViSwapBuffer(RDRAM_ARG PTR(void) frameBufPtr);
 void osViSetMode(RDRAM_ARG PTR(OSViMode));
 void osViSetSpecialFeatures(uint32_t func);
 void osViBlack(uint8_t active);
+void osViRepeatLine(uint8_t active);
 void osViSetXScale(float scale);
 void osViSetYScale(float scale);
 PTR(void) osViGetNextFramebuffer();

diff --git a/ultramodern/src/events.cpp b/ultramodern/src/events.cpp
@@ -345,9 +345,12 @@ extern unsigned int VI_V_BURST_REG;
 extern unsigned int VI_X_SCALE_REG;
 extern unsigned int VI_Y_SCALE_REG;
 
+#define VI_STATE_BLACK 0x20
+#define VI_STATE_REPEATLINE 0x40
+
 uint32_t hstart = 0;
 uint32_t vi_origin_offset = 320 * sizeof(uint16_t);
-bool vi_black = false;
+uint16_t state = 0;
 
 void set_dummy_vi() {
     VI_STATUS_REG = 0x311E;
@@ -366,11 +369,16 @@ void set_dummy_vi() {
 }
 
 extern "C" void osViSwapBuffer(RDRAM_ARG PTR(void) frameBufPtr) {
-    if (vi_black) {
+    VI_H_START_REG = hstart;
+    if (state & VI_STATE_BLACK) {
         VI_H_START_REG = 0;
-    } else {
-        VI_H_START_REG = hstart;
     }
+
+    if (state & VI_STATE_REPEATLINE) {
+        VI_Y_SCALE_REG = 0;
+        VI_ORIGIN_REG = osVirtualToPhysical(frameBufPtr);
+    }
+
     events_context.vi.next_buffer = frameBufPtr;
     events_context.action_queue.enqueue(SwapBuffersAction{ osVirtualToPhysical(frameBufPtr) + vi_origin_offset });
 }
@@ -457,7 +465,19 @@ extern "C" void osViSetSpecialFeatures(uint32_t func) {
 }
 
 extern "C" void osViBlack(uint8_t active) {
-    vi_black = active;
+    if (active) {
+        state |= VI_STATE_BLACK;
+    } else {
+        state &= ~VI_STATE_BLACK;
+    }
+}
+
+extern "C" void osViRepeatLine(uint8_t active) {
+    if (active) {
+        state |= VI_STATE_REPEATLINE;
+    } else {
+        state &= ~VI_STATE_REPEATLINE;
+    }
 }
 
 extern "C" void osViSetXScale(float scale) {