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Start implementing mosaic with a half-baked mode 0 implementation

This commit is contained in:
Jeffrey Pfau 2013-10-23 01:17:53 -07:00
parent 9358cbd690
commit 4b9e9f84be
2 changed files with 64 additions and 11 deletions
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65
src/gba/renderers/video-software.c
View File

@ -260,6 +260,8 @@ static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRender
softwareRenderer->objwin.packed = value >> 8;
break;
case REG_MOSAIC:
softwareRenderer->mosaic.packed = value;
break;
case REG_GREENSWP:
GBALog(0, GBA_LOG_STUB, "Stub video register write: 0x%03X", address);
break;
@ -710,6 +712,10 @@ static void _composite(struct GBAVideoSoftwareRenderer* renderer, int offset, ui
static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y) {
int inX = renderer->start + background->x;
if (background->mosaic) {
int mosaicV = renderer->mosaic.bgV + 1;
y -= y % mosaicV;
}
int inY = y + background->y;
union GBATextMapData mapData;
@ -739,12 +745,15 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
PREPARE_OBJWIN;
int outX = renderer->start;
uint32_t tileData;
uint32_t current;
int pixelData;
int paletteData;
int tileX = 0;
int tileEnd = (renderer->end - renderer->start + (inX & 0x7)) >> 3;
if (inX & 0x7) {
uint32_t tileData;
uint32_t current;
int pixelData, paletteData;
int mod8 = inX & 0x7;
BACKGROUND_TEXT_SELECT_CHARACTER;
@ -786,8 +795,6 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
}
if (inX & 0x7 || (renderer->end - renderer->start) & 0x7) {
tileX = tileEnd;
uint32_t tileData;
uint32_t current;
int pixelData, paletteData;
int mod8 = (inX + renderer->end - renderer->start) & 0x7;
BACKGROUND_TEXT_SELECT_CHARACTER;
@ -839,10 +846,49 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
outX = renderer->start + tileX * 8 - (inX & 0x7);
}
if (background->mosaic) {
int mosaicH = renderer->mosaic.bgH + 1;
int x;
int mosaicWait = outX % mosaicH;
int carryData = 0;
if (!background->multipalette) {
for (; tileX < tileEnd; ++tileX) {
BACKGROUND_TEXT_SELECT_CHARACTER;
charBase = ((background->charBase + (mapData.tile << 5)) >> 2) + localY;
tileData = carryData;
for (x = 0; x < 8; ++x) {
if (!mosaicWait) {
paletteData = mapData.palette << 4;
tileData = ((uint32_t*)renderer->d.vram)[charBase];
if (!mapData.hflip) {
tileData >>= x * 4;
} else {
tileData >>= (7 - x) * 4;
}
tileData &= 0xF;
tileData |= tileData << 4;
tileData |= tileData << 8;
tileData |= tileData << 12;
tileData |= tileData << 16;
tileData |= tileData << 20;
tileData |= tileData << 24;
tileData |= tileData << 28;
carryData = tileData;
mosaicWait = mosaicH;
}
--mosaicWait;
BACKGROUND_DRAW_PIXEL_16;
++outX;
}
}
} else {
// TODO: 256-color mosaic
}
return;
}
if (!background->multipalette) {
uint32_t tileData;
uint32_t current;
int paletteData, pixelData;
for (; tileX < tileEnd; ++tileX) {
BACKGROUND_TEXT_SELECT_CHARACTER;
paletteData = mapData.palette << 4;
@ -890,9 +936,6 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
}
}
} else {
uint32_t tileData;
uint32_t current;
int pixelData;
for (; tileX < tileEnd; ++tileX) {
BACKGROUND_TEXT_SELECT_CHARACTER;
charBase = ((background->charBase + (mapData.tile << 6)) >> 2) + (localY << 1);

10
src/gba/renderers/video-software.h
View File

@ -116,6 +116,16 @@ struct GBAVideoSoftwareRenderer {
uint16_t bldb;
uint16_t bldy;
union {
struct {
unsigned bgH : 4;
unsigned bgV : 4;
unsigned objH : 4;
unsigned objV : 4;
};
uint16_t packed;
} mosaic;
struct WindowN {
union WindowRegion h;
union WindowRegion v;