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Implement BGxCNT

This commit is contained in:
Jeffrey Pfau 2013-04-21 14:09:41 -07:00
parent 265bbe4f8f
commit 3ec0afa8fc
1 changed files with 56 additions and 1 deletions
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57
src/gba/renderers/video-software.c
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@ -10,6 +10,7 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareBackground* bg, uint16_t value);
void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
renderer->d.init = GBAVideoSoftwareRendererInit;
@ -28,9 +29,33 @@ void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
int i;
softwareRenderer->dispcnt.packed = 0x0080;
for (i = 0; i < 4; ++i) {
struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
bg->index = i;
bg->enabled = 0;
bg->priority = 0;
bg->charBase = 0;
bg->mosaic = 0;
bg->multipalette = 0;
bg->screenBase = 0;
bg->overflow = 0;
bg->size = 0;
bg->x = 0;
bg->y = 0;
bg->refx = 0;
bg->refy = 0;
bg->dx = 256;
bg->dmx = 0;
bg->dy = 0;
bg->dmy = 256;
bg->sx = 0;
bg->sy = 0;
}
pthread_mutex_init(&softwareRenderer->mutex, 0);
pthread_cond_init(&softwareRenderer->cond, 0);
}
@ -47,6 +72,22 @@ static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRender
softwareRenderer->dispcnt.packed = value;
GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
break;
case REG_BG0CNT:
value &= 0xFFCF;
GBAVideoSoftwareRendererWriteBGCNT(&softwareRenderer->bg[0], value);
break;
case REG_BG1CNT:
value &= 0xFFCF;
GBAVideoSoftwareRendererWriteBGCNT(&softwareRenderer->bg[1], value);
break;
case REG_BG2CNT:
value &= 0xFFCF;
GBAVideoSoftwareRendererWriteBGCNT(&softwareRenderer->bg[2], value);
break;
case REG_BG3CNT:
value &= 0xFFCF;
GBAVideoSoftwareRendererWriteBGCNT(&softwareRenderer->bg[3], value);
break;
default:
GBALog(GBA_LOG_STUB, "Stub video register write: %03x", address);
}
@ -91,5 +132,19 @@ static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* rendere
}
static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
// TODO
renderer->bg[0].enabled = renderer->dispcnt.bg0Enable;
renderer->bg[1].enabled = renderer->dispcnt.bg1Enable;
renderer->bg[2].enabled = renderer->dispcnt.bg2Enable;
renderer->bg[3].enabled = renderer->dispcnt.bg3Enable;
}
static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
union GBARegisterBGCNT reg = { .packed = value };
bg->priority = reg.priority;
bg->charBase = reg.charBase << 13;
bg->mosaic = reg.mosaic;
bg->multipalette = reg.multipalette;
bg->screenBase = reg.screenBase << 10;
bg->overflow = reg.overflow;
bg->size = reg.size;
}