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Identify and document some stuff in init_vi_settings

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This commit is contained in:
Ryan Myers
2021-10-21 20:49:42 -04:00
parent 0056860f65
commit f2ec5d4d45
1 changed files with 29 additions and 23 deletions
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src/video.c
+29 -23
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@@ -2,6 +2,7 @@
/* RAM_POS: 0x8007A310 */
#include "video.h"
#include "viint.h"
/************ .data ************/
@@ -32,7 +33,7 @@ f32 gVideoHeightRatio;
s32 D_8012617C;
OSMesg D_80126180[8];
OSMesgQueue D_801261A0[8];
OSViMode D_80126260;
OSViMode gTvViMode;
s32 gVideoFbWidths[2];
s32 gVideoFbHeights[2];
u16 *gVideoFramebuffers[2];
@@ -127,6 +128,10 @@ void init_vi_settings(void) {
osViSetMode(&osViModeTable[viModeTableIndex]);
break;
case 1:
//@bug: The video mode being set here is Point sampled
//but the printf implies it was intended to be Anti-aliased.
//By my understanding, this is the case we will always hit in code,
//So maybe it was swapped out late in development?
stubbed_printf("320 by 240 Anti-aliased, Non interlaced.\n");
tvViMode = &osViModeNtscLpn1;
if (osTvType == TV_TYPE_PAL) {
@@ -134,14 +139,15 @@ void init_vi_settings(void) {
} else if (osTvType == TV_TYPE_MPAL) {
tvViMode = &osViModeMpalLpn1;
}
memory_copy(tvViMode, &D_80126260, sizeof(OSViMode));
memory_copy(tvViMode, &gTvViMode, sizeof(OSViMode));
if (osTvType == TV_TYPE_PAL) {
D_80126260.fldRegs[0].vStart -= 0x180000; //0x18 << 16
D_80126260.fldRegs[1].vStart -= 0x180000; //0x18 << 16
D_80126260.fldRegs[0].vStart += 0x18;
D_80126260.fldRegs[1].vStart += 0x18;
//TODO: Figure out what the 0x18 is for
gTvViMode.fldRegs[0].vStart -= (0x18 << 16);
gTvViMode.fldRegs[1].vStart -= (0x18 << 16);
gTvViMode.fldRegs[0].vStart += 0x18;
gTvViMode.fldRegs[1].vStart += 0x18;
}
osViSetMode(&D_80126260);
osViSetMode(&gTvViMode);
break;
case 2:
stubbed_printf("640 by 240 Point sampled, Non interlaced.\n");
@@ -152,12 +158,12 @@ void init_vi_settings(void) {
tvViMode = &osViModeMpalLpn1;
}
memory_copy(tvViMode, &D_80126260, sizeof(OSViMode));
D_80126260.comRegs.width = 0x280;
D_80126260.comRegs.xScale = 0x400;
D_80126260.fldRegs[0].origin = 0x500;
D_80126260.fldRegs[1].origin = 0x500;
osViSetMode(&D_80126260);
memory_copy(tvViMode, &gTvViMode, sizeof(OSViMode));
gTvViMode.comRegs.width = WIDTH(640);
gTvViMode.comRegs.xScale = SCALE(1, 0);
gTvViMode.fldRegs[0].origin = ORIGIN(1280);
gTvViMode.fldRegs[1].origin = ORIGIN(1280);
osViSetMode(&gTvViMode);
break;
case 3:
stubbed_printf("640 by 240 Anti-aliased, Non interlaced.\n");
@@ -167,28 +173,28 @@ void init_vi_settings(void) {
} else if (osTvType == TV_TYPE_MPAL) {
tvViMode = &osViModeMpalLan1;
}
memory_copy(tvViMode, &D_80126260, sizeof(OSViMode));
D_80126260.comRegs.width = 0x280;
D_80126260.comRegs.xScale = 0x400;
D_80126260.fldRegs[0].origin = 0x500;
D_80126260.fldRegs[1].origin = 0x500;
osViSetMode(&D_80126260);
memory_copy(tvViMode, &gTvViMode, sizeof(OSViMode));
gTvViMode.comRegs.width = WIDTH(640);
gTvViMode.comRegs.xScale = SCALE(1, 0);
gTvViMode.fldRegs[0].origin = ORIGIN(1280);
gTvViMode.fldRegs[1].origin = ORIGIN(1280);
osViSetMode(&gTvViMode);
break;
case 4:
stubbed_printf("640 by 480 Point sampled, Interlaced.\n");
osViSetMode(&osViModeTable[viModeTableIndex + 8]);
osViSetMode(&osViModeTable[viModeTableIndex + OS_VI_NTSC_HPN1]);
break;
case 5:
stubbed_printf("640 by 480 Anti-aliased, Interlaced.\n");
osViSetMode(&osViModeTable[viModeTableIndex + 10]);
osViSetMode(&osViModeTable[viModeTableIndex + OS_VI_NTSC_HAN1]);
break;
case 6:
stubbed_printf("640 by 480 Point sampled, Interlaced, De-flickered.\n");
osViSetMode(&osViModeTable[viModeTableIndex + 9]);
osViSetMode(&osViModeTable[viModeTableIndex + OS_VI_NTSC_HPF1]);
break;
case 7:
stubbed_printf("640 by 480 Anti-aliased, Interlaced, De-flickered.\n");
osViSetMode(&osViModeTable[viModeTableIndex + 11]);
osViSetMode(&osViModeTable[viModeTableIndex + OS_VI_NTSC_HAF1]);
break;
}
osViSetSpecialFeatures(OS_VI_DIVOT_ON);