VI accuracy fixes and osSetTime implementation (#123)

* Rewrite VI functionality for higher accuracy

* Implement osSetTime and move update screen to before VI update

Author: Mr-Wiseguy

librecomp/src/ultra_translation.cpp

@@ -73,12 +73,21 @@ extern "C" void osGetCount_recomp(uint8_t * rdram, recomp_context * ctx) {
     ctx->r2 = osGetCount();
 }
 
+extern "C" void osSetCount_recomp(uint8_t * rdram, recomp_context * ctx) {
+    osSetCount(ctx->r4);
+}
+
 extern "C" void osGetTime_recomp(uint8_t * rdram, recomp_context * ctx) {
     uint64_t total_count = osGetTime();
     ctx->r2 = (int32_t)(total_count >> 32);
     ctx->r3 = (int32_t)(total_count >> 0);
 }
 
+extern "C" void osSetTime_recomp(uint8_t * rdram, recomp_context * ctx) {
+    uint64_t t = ((uint64_t)(ctx->r4) << 32) | ((ctx->r5) & 0xFFFFFFFFu);
+    osSetTime(t);
+}
+
 extern "C" void osSetTimer_recomp(uint8_t * rdram, recomp_context * ctx) {
     uint64_t countdown = ((uint64_t)(ctx->r6) << 32) | ((ctx->r7) & 0xFFFFFFFFu);
     uint64_t interval = load_doubleword(rdram, ctx->r29, 0x10);

ultramodern/include/ultramodern/renderer_context.hpp

@@ -28,6 +28,23 @@ struct SDL_Window;
 
 namespace ultramodern {
     namespace renderer {
+        struct ViRegs {
+            unsigned int VI_STATUS_REG;
+            unsigned int VI_ORIGIN_REG;
+            unsigned int VI_WIDTH_REG;
+            unsigned int VI_INTR_REG;
+            unsigned int VI_V_CURRENT_LINE_REG;
+            unsigned int VI_TIMING_REG;
+            unsigned int VI_V_SYNC_REG;
+            unsigned int VI_H_SYNC_REG;
+            unsigned int VI_LEAP_REG;
+            unsigned int VI_H_START_REG;
+            unsigned int VI_V_START_REG;
+            unsigned int VI_V_BURST_REG;
+            unsigned int VI_X_SCALE_REG;
+            unsigned int VI_Y_SCALE_REG;
+        };
+        ViRegs* get_vi_regs();
 
 #if defined(_WIN32)
         // Native HWND handle to the target window.
@@ -67,7 +84,7 @@ namespace ultramodern {
 
                 virtual void enable_instant_present() = 0;
                 virtual void send_dl(const OSTask* task) = 0;
-                virtual void update_screen(uint32_t vi_origin) = 0;
+                virtual void update_screen() = 0;
                 virtual void shutdown() = 0;
                 virtual uint32_t get_display_framerate() const = 0;
                 virtual float get_resolution_scale() const = 0;

ultramodern/include/ultramodern/ultra64.h

@@ -290,7 +290,9 @@ void osViSetYScale(float scale);
 PTR(void) osViGetNextFramebuffer();
 PTR(void) osViGetCurrentFramebuffer();
 u32 osGetCount();
+void osSetCount(u32 count);
 OSTime osGetTime();
+void osSetTime(OSTime t);
 int osSetTimer(RDRAM_ARG PTR(OSTimer) timer, OSTime countdown, OSTime interval, PTR(OSMesgQueue) mq, OSMesg msg);
 int osStopTimer(RDRAM_ARG PTR(OSTimer) timer);
 u32 osVirtualToPhysical(PTR(void) addr);