From 65d72a54cf712292f0bb97af8eeaa10c2eeb2e8c Mon Sep 17 00:00:00 2001
From: mzxrules <mzxrules@gmail.com>
Date: Mon, 29 May 2023 17:40:10 -0400
Subject: z_syscfb.c, z_vimode.c, code_80140CE0 split and OK (#1159)

* z_vimode

* Fixups

* WIP

* matching

* sys_cfb OK

* some documentation

* vimode docs, name all syscfb vars

* quick fixes

* suggested changes, more things I missed

* merge suggestions

* code_80140CE0 -> z_viscvg

* format

* update symbols

* more suggestions

* fix include order

* sNotebookViMode comment, bss fix

---------

Co-authored-by: Kelebek1 <eeeedddccc@hotmail.co.uk>
Co-authored-by: louist103 <louist103@gmail.com>
---
 src/code/sys_cfb.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 116 insertions(+), 9 deletions(-)

(limited to 'src/code/sys_cfb.c')

diff --git a/src/code/sys_cfb.c b/src/code/sys_cfb.c
index 25d92227c..16c39855c 100644
--- a/src/code/sys_cfb.c
+++ b/src/code/sys_cfb.c
@@ -2,20 +2,127 @@
 #include "buffers.h"
 #include "system_malloc.h"
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/func_80178750.s")
+extern u16 gFramebufferHiRes0[HIRES_BUFFER_WIDTH][HIRES_BUFFER_HEIGHT];
+extern u16 gFramebufferHiRes1[HIRES_BUFFER_WIDTH][HIRES_BUFFER_HEIGHT];
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/func_80178818.s")
+OSViMode sNotebookViMode; // placeholder name
+void* gFramebuffers[2];
+OSViMode* gActiveViMode;
+u16* gZBufferPtr;
+void* gWorkBuffer;
+u64* gGfxSPTaskOutputBufferPtr;
+void* gGfxSPTaskOutputBufferEnd;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/func_80178978.s")
+void* sCfbLoRes1;
+void* sCfbLoRes0;
+u16 (*gZBufferLoRes)[SCREEN_WIDTH * SCREEN_HEIGHT];
+u16 (*gWorkBufferLoRes)[SCREEN_WIDTH * SCREEN_HEIGHT];
+u64 (*gGfxSPTaskOutputBufferLoRes)[0x3000];
+void* gGfxSPTaskOutputBufferEndLoRes;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/func_801789D4.s")
+void* sCfbHiRes1;
+void* sCfbHiRes0;
+u16 (*gZBufferHiRes)[HIRES_BUFFER_WIDTH * HIRES_BUFFER_HEIGHT];
+u16 (*gWorkBufferHiRes)[HIRES_BUFFER_WIDTH * HIRES_BUFFER_HEIGHT];
+u64 (*gGfxSPTaskOutputBufferHiRes)[0x3000];
+void* gGfxSPTaskOutputBufferEndHiRes;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/SysCfb_GetFbPtr.s")
+s16 gCfbWidth;
+s16 gCfbHeight;
+s16 gCfbLeftAdjust;
+s16 gCfbUpperAdjust;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/SysCfb_GetZBuffer.s")
+u8 gSysCfbHiResEnabled;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/func_80178A24.s")
+void SysCfb_SetLoResMode(void) {
+    gFramebuffers[1] = sCfbLoRes1;
+    gFramebuffers[0] = sCfbLoRes0;
+    gZBufferPtr = *gZBufferLoRes;
+    gWorkBuffer = gWorkBufferLoRes;
+    gGfxSPTaskOutputBufferPtr = *gGfxSPTaskOutputBufferLoRes;
+    gGfxSPTaskOutputBufferEnd = gGfxSPTaskOutputBufferEndLoRes;
+    gCfbWidth = SCREEN_WIDTH;
+    gCfbHeight = SCREEN_HEIGHT;
+    gCfbLeftAdjust = 0;
+    gCfbUpperAdjust = 0;
+    gSysCfbHiResEnabled = false;
+    gScreenWidth = gCfbWidth;
+    gScreenHeight = gCfbHeight;
+    gActiveViMode = &osViModeNtscLan1;
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/func_80178A34.s")
+void SysCfb_SetHiResMode(void) {
+    gFramebuffers[1] = sCfbHiRes1;
+    gFramebuffers[0] = sCfbHiRes0;
+    gZBufferPtr = *gZBufferHiRes;
+    gWorkBuffer = gWorkBufferHiRes;
+    gGfxSPTaskOutputBufferPtr = *gGfxSPTaskOutputBufferHiRes;
+    gGfxSPTaskOutputBufferEnd = gGfxSPTaskOutputBufferEndHiRes;
+    if (1) {}
+    gCfbWidth = HIRES_BUFFER_WIDTH;
+    gCfbHeight = HIRES_BUFFER_HEIGHT;
+    gCfbLeftAdjust = 30;
+    gCfbUpperAdjust = 10;
+    gScreenWidth = gCfbWidth;
+    gScreenHeight = gCfbHeight;
+    if ((gCfbWidth == SCREEN_WIDTH_HIRES) && (gCfbHeight == SCREEN_HEIGHT_HIRES)) {
+        gActiveViMode = &osViModeNtscHpf1;
+    } else {
+        s32 rightAdjust;
+        s32 lowerAdjust;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_cfb/func_80178A94.s")
+    //! FAKE:
+    l1:
+        rightAdjust = gCfbWidth - 610;
+        lowerAdjust = gCfbHeight - 470;
+        ViMode_Configure(&sNotebookViMode, -1, osTvType, 0, 1, 0, 1, gCfbWidth, gCfbHeight, 30, rightAdjust, 10,
+                         lowerAdjust);
+        gActiveViMode = &sNotebookViMode;
+    }
+    gSysCfbHiResEnabled = true;
+}
+
+void SysCfb_Init(void) {
+    sCfbLoRes1 = gFramebuffer1;
+    sCfbLoRes0 = gFramebuffer0;
+    sCfbHiRes1 = gFramebufferHiRes1;
+    sCfbHiRes0 = gFramebufferHiRes0;
+    SysCfb_SetLoResMode();
+}
+
+// Unused
+void SysCfb_Reset(void) {
+    gFramebuffers[0] = NULL;
+    gFramebuffers[1] = NULL;
+}
+
+void* SysCfb_GetFramebuffer(s32 index) {
+    if (index < 2) {
+        return gFramebuffers[index];
+    }
+    return NULL;
+}
+
+void* SysCfb_GetZBuffer(void) {
+    return gZBufferPtr;
+}
+
+void* SysCfb_GetWorkBuffer(void) {
+    return gWorkBuffer;
+}
+
+u16 SysCfb_GetZBufferPixel(s32 x, s32 y) {
+    u16* zBuff = SysCfb_GetZBuffer();
+    u16 val;
+
+    if (zBuff != NULL) {
+        val = (&zBuff[x])[y * gCfbWidth];
+    } else {
+        val = 0;
+    }
+    return val;
+}
+
+s32 SysCfb_GetZBufferInt(s32 x, s32 y) {
+    return Environment_ZBufValToFixedPoint(SysCfb_GetZBufferPixel(x, y) << 2) >> 3;
+}
-- 
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