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DS Video: Improve extended charBase bits

This commit is contained in:
Vicki Pfau 2017-02-26 17:06:05 -08:00
parent eeeac7af77
commit a2c9df0eb3
2 changed files with 38 additions and 22 deletions
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56
src/ds/renderers/software.c
View File

@ -96,6 +96,33 @@ static bool _regenerateExtPalette(struct DSVideoSoftwareRenderer* renderer, bool
return true;
}
static void _updateCharBase(struct DSVideoSoftwareRenderer* softwareRenderer, bool engB) {
struct GBAVideoSoftwareRenderer* eng;
if (!engB) {
eng = &softwareRenderer->engA;
} else {
eng = &softwareRenderer->engB;
}
int i;
uint32_t charBase = DSRegisterDISPCNTGetCharBase(softwareRenderer->dispcntA) << 16;
uint32_t screenBase = DSRegisterDISPCNTGetScreenBase(softwareRenderer->dispcntA) << 16;
for (i = 0; i < 4; ++i) {
if (!engB) {
uint32_t control = eng->bg[i].control;
eng->d.writeVideoRegister(&eng->d, DS9_REG_A_BG0CNT + i * 2, control);
eng->bg[i].control = control;
}
eng->bg[i].charBase = GBARegisterBGCNTGetCharBase(eng->bg[i].control) << 14;
if (!engB) {
softwareRenderer->engA.bg[i].charBase += charBase;
softwareRenderer->engA.bg[i].screenBase &= ~0x70000;
softwareRenderer->engA.bg[i].screenBase |= screenBase;
}
}
}
void DSVideoSoftwareRendererCreate(struct DSVideoSoftwareRenderer* renderer) {
renderer->d.init = DSVideoSoftwareRendererInit;
@ -209,24 +236,7 @@ static void DSVideoSoftwareRendererUpdateDISPCNT(struct DSVideoSoftwareRenderer*
}
}
if (!engB) {
uint32_t charBase = DSRegisterDISPCNTGetCharBase(softwareRenderer->dispcntA) << 16;
uint32_t screenBase = DSRegisterDISPCNTGetScreenBase(softwareRenderer->dispcntA) << 16;
softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG0CNT, softwareRenderer->engA.bg[0].control);
softwareRenderer->engA.bg[0].charBase += charBase;
softwareRenderer->engA.bg[0].screenBase &= ~0x70000;
softwareRenderer->engA.bg[0].screenBase |= screenBase;
softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG1CNT, softwareRenderer->engA.bg[1].control);
softwareRenderer->engA.bg[1].charBase += charBase;
softwareRenderer->engA.bg[1].screenBase &= ~0x70000;
softwareRenderer->engA.bg[1].screenBase |= screenBase;
softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG2CNT, softwareRenderer->engA.bg[2].control);
softwareRenderer->engA.bg[2].charBase += charBase;
softwareRenderer->engA.bg[2].screenBase &= ~0x70000;
softwareRenderer->engA.bg[2].screenBase |= screenBase;
softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG3CNT, softwareRenderer->engA.bg[3].control);
softwareRenderer->engA.bg[3].charBase += charBase;
softwareRenderer->engA.bg[3].screenBase &= ~0x70000;
softwareRenderer->engA.bg[3].screenBase |= screenBase;
_updateCharBase(softwareRenderer, engB);
}
}
@ -243,10 +253,18 @@ static uint16_t DSVideoSoftwareRendererWriteVideoRegister(struct DSVideoRenderer
case DS9_REG_A_BG0CNT:
case DS9_REG_A_BG1CNT:
softwareRenderer->engA.bg[(address - DS9_REG_A_BG0CNT) >> 1].control = value;
// Fall through
case DS9_REG_A_BG2CNT:
case DS9_REG_A_BG3CNT:
_updateCharBase(softwareRenderer, false);
break;
case DS9_REG_B_BG0CNT:
case DS9_REG_B_BG1CNT:
softwareRenderer->engB.bg[(address - DS9_REG_A_BG0CNT) >> 1].control = value;
softwareRenderer->engB.bg[(address - DS9_REG_B_BG0CNT) >> 1].control = value;
// Fall through
case DS9_REG_B_BG2CNT:
case DS9_REG_B_BG3CNT:
_updateCharBase(softwareRenderer, true);
break;
case DS9_REG_A_DISPCNT_LO:
softwareRenderer->dispcntA &= 0xFFFF0000;

2
src/gba/renderers/video-software.c
View File

@ -617,9 +617,7 @@ static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer*
UNUSED(renderer);
bg->priority = GBARegisterBGCNTGetPriority(value);
bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
if (!renderer->d.vramBG[4]) {
bg->charBase &= 0xC000;
}
bg->mosaic = GBARegisterBGCNTGetMosaic(value);
bg->multipalette = GBARegisterBGCNTGet256Color(value);
bg->screenBase &= ~0xF800;