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GB Video: Improved window implementation

This commit is contained in:
Vicki Pfau 2017-12-26 16:35:15 -05:00
parent b25ac9147d
commit e7407770cb
2 changed files with 36 additions and 2 deletions
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2
include/mgba/internal/gb/renderers/software.h
View File

@ -31,6 +31,8 @@ struct GBVideoSoftwareRenderer {
uint8_t wy;
uint8_t wx;
uint8_t currentWy;
int lastY;
bool hasWindow;
GBRegisterLCDC lcdc;
enum GBModel model;

36
src/gb/renderers/software.c
View File

@ -38,6 +38,10 @@ static void _clearScreen(struct GBVideoSoftwareRenderer* renderer) {
}
}
static bool _inWindow(struct GBVideoSoftwareRenderer* renderer) {
return GBRegisterLCDCIsWindow(renderer->lcdc) && GB_VIDEO_HORIZONTAL_PIXELS + 7 > renderer->wx;
}
void GBVideoSoftwareRendererCreate(struct GBVideoSoftwareRenderer* renderer) {
renderer->d.init = GBVideoSoftwareRendererInit;
renderer->d.deinit = GBVideoSoftwareRendererDeinit;
@ -65,6 +69,8 @@ static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum G
softwareRenderer->scx = 0;
softwareRenderer->wy = 0;
softwareRenderer->currentWy = 0;
softwareRenderer->lastY = 0;
softwareRenderer->hasWindow = false;
softwareRenderer->wx = 0;
softwareRenderer->model = model;
}
@ -74,11 +80,31 @@ static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
UNUSED(softwareRenderer);
}
static void GBVideoSoftwareRendererUpdateWindow(struct GBVideoSoftwareRenderer* renderer, bool before, bool after) {
if (renderer->lastY >= GB_VIDEO_VERTICAL_PIXELS || after == before) {
return;
}
if (renderer->lastY >= renderer->wy) {
if (!after) {
renderer->currentWy -= renderer->lastY;
renderer->hasWindow = true;
} else {
if (!renderer->hasWindow) {
renderer->currentWy = renderer->lastY + 1 - renderer->wy;
} else {
renderer->currentWy += renderer->lastY;
}
}
}
}
static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
bool wasWindow = _inWindow(softwareRenderer);
switch (address) {
case REG_LCDC:
softwareRenderer->lcdc = value;
GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer));
break;
case REG_SCY:
softwareRenderer->scy = value;
@ -88,9 +114,11 @@ static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer*
break;
case REG_WY:
softwareRenderer->wy = value;
GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer));
break;
case REG_WX:
softwareRenderer->wx = value;
GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer));
break;
}
return value;
@ -134,6 +162,7 @@ static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, ui
static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
softwareRenderer->lastY = y;
uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
maps += GB_SIZE_MAP;
@ -142,7 +171,8 @@ static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, i
memset(&softwareRenderer->row[startX], 0, endX - startX);
}
if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && softwareRenderer->wy <= y && endX >= softwareRenderer->wx - 7) {
int wy = softwareRenderer->wy + softwareRenderer->currentWy;
if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && wy <= y && endX >= softwareRenderer->wx - 7) {
if (softwareRenderer->wx - 7 > 0 && !softwareRenderer->d.disableBG) {
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, softwareRenderer->wx - 7, softwareRenderer->scx, softwareRenderer->scy + y);
}
@ -152,7 +182,7 @@ static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, i
maps += GB_SIZE_MAP;
}
if (!softwareRenderer->d.disableWIN) {
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, softwareRenderer->wx - 7, endX, 7 - softwareRenderer->wx, softwareRenderer->currentWy);
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, softwareRenderer->wx - 7, endX, 7 - softwareRenderer->wx, y - wy);
}
} else if (!softwareRenderer->d.disableBG) {
GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx, softwareRenderer->scy + y);
@ -201,7 +231,9 @@ static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer)
if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
_clearScreen(softwareRenderer);
}
softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
softwareRenderer->currentWy = 0;
softwareRenderer->hasWindow = false;
}
static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {