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DS GX: Blending and shadowing fixes

This commit is contained in:
Vicki Pfau 2017-04-07 08:07:31 -07:00
parent 64f1870d7b
commit e5e788f0c8
2 changed files with 26 additions and 15 deletions
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2
include/mgba/internal/ds/gx/software.h
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@ -90,7 +90,7 @@ struct DSGXSoftwareRenderer {
struct DSGXSoftwareEdgeList activeEdges;
int32_t* depthBuffer;
uint8_t* stencilBuffer;
uint16_t* stencilBuffer;
color_t* scanlineCache;
int sort;
uint16_t clearStencil;

35
src/ds/gx/software.c
View File

@ -12,6 +12,8 @@
DEFINE_VECTOR(DSGXSoftwarePolygonList, struct DSGXSoftwarePolygon);
DEFINE_VECTOR(DSGXSoftwareEdgeList, struct DSGXSoftwareEdge);
#define SHADOW_BIT 0x4000
static void DSGXSoftwareRendererInit(struct DSGXRenderer* renderer);
static void DSGXSoftwareRendererReset(struct DSGXRenderer* renderer);
static void DSGXSoftwareRendererDeinit(struct DSGXRenderer* renderer);
@ -421,7 +423,7 @@ static void DSGXSoftwareRendererInit(struct DSGXRenderer* renderer) {
DSGXSoftwareEdgeListInit(&softwareRenderer->activeEdges, 16);
softwareRenderer->scanlineCache = anonymousMemoryMap(sizeof(color_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
softwareRenderer->depthBuffer = anonymousMemoryMap(sizeof(int32_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
softwareRenderer->stencilBuffer = anonymousMemoryMap(sizeof(uint8_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
softwareRenderer->stencilBuffer = anonymousMemoryMap(sizeof(uint16_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
}
static void DSGXSoftwareRendererReset(struct DSGXRenderer* renderer) {
@ -436,7 +438,7 @@ static void DSGXSoftwareRendererDeinit(struct DSGXRenderer* renderer) {
DSGXSoftwareEdgeListDeinit(&softwareRenderer->activeEdges);
mappedMemoryFree(softwareRenderer->scanlineCache, sizeof(color_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
mappedMemoryFree(softwareRenderer->depthBuffer, sizeof(int32_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
mappedMemoryFree(softwareRenderer->stencilBuffer, sizeof(uint8_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
mappedMemoryFree(softwareRenderer->stencilBuffer, sizeof(uint16_t) * DS_VIDEO_VERTICAL_PIXELS * DS_VIDEO_HORIZONTAL_PIXELS);
}
static void DSGXSoftwareRendererInvalidateTex(struct DSGXRenderer* renderer, int slot) {
@ -618,14 +620,15 @@ static void _preparePoly(struct DSGXRenderer* renderer, struct DSGXVertex* verts
static void _drawSpan(struct DSGXSoftwareRenderer* softwareRenderer, struct DSGXSoftwareSpan* span, int y) {
color_t* scanline = &softwareRenderer->scanlineCache[DS_VIDEO_HORIZONTAL_PIXELS * y];
int32_t* depth = &softwareRenderer->depthBuffer[DS_VIDEO_HORIZONTAL_PIXELS * y];
uint8_t* stencil = &softwareRenderer->stencilBuffer[DS_VIDEO_HORIZONTAL_PIXELS * y];
uint16_t* stencil = &softwareRenderer->stencilBuffer[DS_VIDEO_HORIZONTAL_PIXELS * y];
int32_t x = span->ep[0].coord[0] >> 12;
if (x < 0) {
x = 0;
}
unsigned stencilValue = span->polyId;
stencilValue |= stencilValue << 8;
if (span->poly->blendFormat == 3) {
stencilValue |= 0x40;
stencilValue |= SHADOW_BIT;
}
for (; x < (span->ep[1].coord[0] >> 12) && x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
if (span->ep[0].coord[softwareRenderer->sort] < depth[x]) {
@ -640,28 +643,36 @@ static void _drawSpan(struct DSGXSoftwareRenderer* softwareRenderer, struct DSGX
ab = b;
}
if (a == 0x1F) {
if (!(s & 0x40) || (s & 0x3F && !(stencil[x] & 0x40))) {
depth[x] = span->ep[0].coord[softwareRenderer->sort];
scanline[x] = color;
s &= ~0x40;
}
stencil[x] = s;
stencil[x] = s & 0x3F00;
} else if (a) {
// TODO: Disable alpha?
if (b) {
color = _mix32(a, color, 0x1F - a, current);
color |= ab << 27;
}
if (stencil[x] != s) {
if (!(s & 0x40) || (s & 0x3F && !(stencil[x] & 0x40))) {
if ((stencil[x] & 0x3F) != (s & 0x3F)) {
if (!(s & SHADOW_BIT) || ((stencil[x] & 0x3F00) != (s & 0x3F00) && s & 0x3F00 && stencil[x] & SHADOW_BIT)) {
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
depth[x] = span->ep[0].coord[softwareRenderer->sort];
}
scanline[x] = color;
s &= ~0x40;
stencil[x] &= 0x3F00;
} else {
s = 0;
stencil[x] &= 0x3F3F;
}
stencil[x] = s;
}
s &= ~0x7F00;
stencil[x] |= s;
}
} else if ((stencilValue & 0x7F00) == SHADOW_BIT) {
_resolveEndpoint(span);
color_t color = _lookupColor(softwareRenderer, &span->ep[0], span->poly);
unsigned a = color >> 27;
if (a > 0) {
stencil[x] |= SHADOW_BIT;
}
}
_stepEndpoint(span);