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DS GX: Half baked compressed textures

This commit is contained in:
Vicki Pfau 2017-03-05 12:00:31 -08:00
parent 5fd2f0c43a
commit e5e9547740
1 changed files with 86 additions and 7 deletions
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93
src/ds/gx/software.c
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@ -70,7 +70,28 @@ static unsigned _mix32(int weightA, unsigned colorA, int weightB, unsigned color
return c;
}
static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftwarePolygon* poly) {
static unsigned _mixTexels(int weightA, unsigned colorA, int weightB, unsigned colorB) {
unsigned c = 0;
unsigned a, b;
a = colorA & 0x7C1F;
b = colorB & 0x7C1F;
a |= (colorA & 0x3E0) << 16;
b |= (colorB & 0x3E0) << 16;
c = ((a * weightA + b * weightB) / 8);
if (c & 0x04000000) {
c = (c & ~0x07E00000) | 0x03E00000;
}
if (c & 0x0020) {
c = (c & ~0x003F) | 0x001F;
}
if (c & 0x8000) {
c = (c & ~0xF800) | 0x7C00;
}
c = (c & 0x7C1F) | ((c >> 16) & 0x03E0);
return c;
}
static color_t _lookupColor(struct DSGXSoftwareRenderer* renderer, struct DSGXSoftwareEndpoint* ep, struct DSGXSoftwarePolygon* poly) {
// TODO: Optimize
uint16_t texel;
@ -135,7 +156,11 @@ static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftware
texel = ((uint8_t*) poly->texBase)[texelCoord];
break;
case 5:
return _finishColor(0x3F, 0, 0x3F, 0x1F);
texelCoord = (s & ~3) + (t & 3) + (t >> 2) * poly->texW;
texel = ((uint8_t*) poly->texBase)[texelCoord];
texel >>= (s & 3) * 2;
texel &= 3;
break;
case 6:
texel = ((uint8_t*) poly->texBase)[texelCoord];
a = (texel >> 3) & 0x1F;
@ -144,12 +169,66 @@ static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftware
case 7:
return _finishColor(0x3F, 0x3F, 0x3F, 0x1F);
}
if (DSGXTexParamsIs0Transparent(poly->poly->texParams) && !texel) {
return 0;
}
uint8_t r, g, b;
unsigned wr, wg, wb;
texel = poly->palBase[texel];
if (poly->texFormat == 5) {
// TODO: Slot 2 uses upper half
uint16_t texel2 = renderer->d.tex[1][texelCoord >> 1];
int a = 0x8;
int b = 0;
switch (texel2 >> 14) {
case 0:
if (texel == 3) {
return 0;
}
texel = poly->palBase[texel + (texel2 & 0x3FFF) * 2];
break;
case 1:
if (texel == 3) {
return 0;
}
if (texel != 2) {
texel = poly->palBase[texel + (texel2 & 0x3FFF) * 2];
} else {
texel = poly->palBase[(texel2 & 0x3FFF) * 2];
texel2 = poly->palBase[(texel2 & 0x3FFF) * 2 + 1];
a = 4;
b = 4;
}
break;
case 2:
texel = poly->palBase[texel + (texel2 & 0x3FFF) * 2];
break;
case 3:
switch (texel) {
case 0:
case 1:
texel = poly->palBase[texel + (texel2 & 0x3FFF) * 2];
break;
case 2:
texel = poly->palBase[(texel2 & 0x3FFF) * 2];
texel2 = poly->palBase[(texel2 & 0x3FFF) * 2 + 1];
a = 5;
b = 3;
break;
case 3:
texel = poly->palBase[(texel2 & 0x3FFF) * 2];
texel2 = poly->palBase[(texel2 & 0x3FFF) * 2 + 1];
a = 3;
b = 5;
break;
}
break;
}
if (b) {
texel = _mixTexels(a, texel, b, texel2);
}
} else {
if (DSGXTexParamsIs0Transparent(poly->poly->texParams) && !texel) {
return 0;
}
texel = poly->palBase[texel];
}
_expandColor(texel, &r, &g, &b);
switch (poly->blendFormat) {
case 1:
@ -451,7 +530,7 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
for (; x < span->ep[1].x >> 12 && x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
struct DSGXSoftwareEndpoint ep;
_lerpEndpoint(span, &ep, x);
color_t color = _lookupColor(&ep, span->poly);
color_t color = _lookupColor(softwareRenderer, &ep, span->poly);
unsigned a = color >> 27;
if (a == 0x1F || !(scanline[x] & 0xF8000000)) {
if (softwareRenderer->wSort) {