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DS GX: Start work on alpha

This commit is contained in:
Vicki Pfau 2017-03-03 19:33:09 -08:00
parent 61ef3501c1
commit 32f63d7d93
2 changed files with 27 additions and 17 deletions
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40
src/ds/gx/software.c
View File

@ -28,12 +28,13 @@ static void _expandColor(uint16_t c15, uint8_t* r, uint8_t* g, uint8_t* b) {
*b = ((c15 >> 9) & 0x3E) | 1;
}
static color_t _finishColor(uint8_t r, uint8_t g, uint8_t b) {
static color_t _finishColor(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
#ifndef COLOR_16_BIT
color_t rgb = (r << 2) & 0xF8;
rgb |= (g << 10) & 0xF800;
rgb |= (b << 18) & 0xF80000;
return rgb;
color_t rgba = (r << 2) & 0xF8;
rgba |= (g << 10) & 0xF800;
rgba |= (b << 18) & 0xF80000;
rgba |= (a << 27) & 0xF8000000;
return rgba;
#else
#error Unsupported color depth
#endif
@ -75,12 +76,17 @@ static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftware
}
uint16_t texelCoord = s + t * poly->texW;
uint8_t a = 0x1F;
switch (poly->texFormat) {
case 0:
default:
return _finishColor(ep->cr, ep->cg, ep->cb);
return _finishColor(ep->cr, ep->cg, ep->cb, 0x1F);
case 1:
return _finishColor(0, 0, 0x3F);
texel = ((uint8_t*) poly->texBase)[texelCoord];
a = (texel >> 5) & 0x7;
a = (a << 2) + (a >> 1);
texel &= 0x1F;
break;
case 2:
texel = ((uint8_t*) poly->texBase)[texelCoord >> 2];
if (texelCoord & 0x3) {
@ -99,14 +105,17 @@ static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftware
texel = ((uint8_t*) poly->texBase)[texelCoord];
break;
case 5:
return _finishColor(0x3F, 0, 0x3F);
return _finishColor(0x3F, 0, 0x3F, 0x1F);
case 6:
return _finishColor(0x3F, 0x3F, 0);
texel = ((uint8_t*) poly->texBase)[texelCoord];
a = (texel >> 3) & 0x1F;
texel &= 0x7;
break;
case 7:
return _finishColor(0x3F, 0x3F, 0x3F);
return _finishColor(0x3F, 0x3F, 0x3F, 0x1F);
}
if (DSGXTexParamsIs0Transparent(poly->poly->texParams) && !texel) {
return FLAG_UNWRITTEN;
return 0;
}
uint8_t r, g, b;
unsigned wr, wg, wb;
@ -116,12 +125,12 @@ static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftware
case 1:
default:
// TODO: Alpha
return _finishColor(r, g, b);
return _finishColor(r, g, b, a);
case 0:
wr = ((r + 1) * (ep->cr + 1) - 1) >> 6;
wg = ((g + 1) * (ep->cg + 1) - 1) >> 6;
wb = ((b + 1) * (ep->cb + 1) - 1) >> 6;
return _finishColor(wr, wg, wb);
return _finishColor(wr, wg, wb, a);
}
}
@ -447,7 +456,7 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
struct DSGXSoftwareSpan* span = NULL;
struct DSGXSoftwareEndpoint ep;
int32_t depth = INT32_MAX;
scanline[i] = FLAG_UNWRITTEN;
scanline[i] = 0;
if (i >= nextSpanX) {
size_t nextSpanId = DSGXSoftwareSpanListSize(&softwareRenderer->activeSpans);
span = DSGXSoftwareSpanListGetPointer(&softwareRenderer->activeSpans, nextSpanId - 1);
@ -466,7 +475,8 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
if (i <= (span->ep[1].x >> 12)) {
_lerpEndpoint(span, &ep, i);
color_t color = _lookupColor(&ep, span->poly);
if (color != FLAG_UNWRITTEN) {
if (color & 0xF8000000) {
// TODO: Alpha
if (softwareRenderer->wSort) {
if (ep.w < depth) {
depth = ep.w;

4
src/ds/renderers/software.c
View File

@ -391,8 +391,8 @@ static void DSVideoSoftwareRendererDrawGBAScanline(struct GBAVideoRenderer* rend
flags |= FLAG_TARGET_1 * (softwareRenderer->bg[0].target1 && softwareRenderer->blendEffect == BLEND_ALPHA && GBAWindowControlIsBlendEnable(softwareRenderer->currentWindow.packed));
int x;
for (x = softwareRenderer->start; x < softwareRenderer->end; ++x) {
if ((scanline[x] & FLAG_UNWRITTEN) != FLAG_UNWRITTEN) {
_compositeBlendNoObjwin(softwareRenderer, &softwareRenderer->row[x], scanline[x] | flags, softwareRenderer->row[x]);
if (scanline[x] & 0xF8000000) {
_compositeBlendNoObjwin(softwareRenderer, &softwareRenderer->row[x], (scanline[x] & 0x00FFFFFF) | flags, softwareRenderer->row[x]);
}
}
} else {