ShuriZma
/
mgba
mirror of https://github.com/mgba-emu/mgba.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

DS GX: Start setting up lighting parameters

This commit is contained in:
Vicki Pfau 2017-03-17 16:35:02 -07:00
parent 8b276c9262
commit 1743dd24b8
2 changed files with 84 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
include/mgba/internal/ds/gx.h
View File

@ -155,6 +155,13 @@ struct DSGXRenderer {
int viewportHeight;
};
struct DSGXLight {
int16_t color;
int16_t x;
int16_t y;
int16_t z;
};
struct DS;
struct DSGX {
struct DS* p;
@ -201,6 +208,12 @@ struct DSGX {
struct DSGXMatrix clipMatrix;
struct DSGXLight lights[4];
int16_t diffuse;
int16_t ambient;
int16_t specular;
int16_t emit;
int viewportX1;
int viewportY1;
int viewportX2;

83
src/ds/gx.c
View File

@ -687,6 +687,25 @@ static int16_t _dotTexture(struct DSGXVertex* vertex, int mode, int32_t* col) {
return sum >> 20;
}
static int32_t _dotFrac(int16_t x, int16_t y, int16_t z, int32_t* col) {
int64_t a;
int64_t b;
int64_t sum;
a = col[0];
b = x;
sum = a * b;
a = col[4];
b = y;
sum += a * b;
a = col[8];
b = z;
sum += a * b;
a = col[12];
b = MTX_ONE;
sum += a * b;
return sum >> 12;
}
static void _emitVertex(struct DSGX* gx, uint16_t x, uint16_t y, uint16_t z) {
if (gx->vertexMode < 0 || gx->vertexIndex == DS_GX_VERTEX_BUFFER_SIZE || gx->polygonIndex == DS_GX_POLYGON_BUFFER_SIZE) {
return;
@ -699,20 +718,18 @@ static void _emitVertex(struct DSGX* gx, uint16_t x, uint16_t y, uint16_t z) {
gx->currentVertex.vz = _dotViewport(&gx->currentVertex, &gx->clipMatrix.m[2]);
gx->currentVertex.vw = _dotViewport(&gx->currentVertex, &gx->clipMatrix.m[3]);
if (DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams) > 0) {
int32_t m12 = gx->texMatrix.m[12];
int32_t m13 = gx->texMatrix.m[13];
if (DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams) > 1) {
gx->texMatrix.m[12] = gx->currentVertex.vs;
gx->texMatrix.m[13] = gx->currentVertex.vt;
}
gx->currentVertex.vs = _dotTexture(&gx->currentVertex, DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams), &gx->texMatrix.m[0]);
gx->currentVertex.vt = _dotTexture(&gx->currentVertex, DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams), &gx->texMatrix.m[1]);
gx->texMatrix.m[12] = m12;
gx->texMatrix.m[13] = m13;
} else {
if (DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams) == 0) {
gx->currentVertex.vs = gx->currentVertex.s;
gx->currentVertex.vt = gx->currentVertex.t;
} else if (DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams) == 3) {
int32_t m12 = gx->texMatrix.m[12];
int32_t m13 = gx->texMatrix.m[13];
gx->texMatrix.m[12] = gx->currentVertex.vs;
gx->texMatrix.m[13] = gx->currentVertex.vt;
gx->currentVertex.vs = _dotTexture(&gx->currentVertex, 3, &gx->texMatrix.m[0]);
gx->currentVertex.vt = _dotTexture(&gx->currentVertex, 3, &gx->texMatrix.m[1]);
gx->texMatrix.m[12] = m12;
gx->texMatrix.m[13] = m13;
}
gx->pendingVertices[gx->pendingVertexIndex] = gx->currentVertex;
@ -1255,6 +1272,10 @@ static void _fifoRun(struct mTiming* timing, void* context, uint32_t cyclesLate)
gx->currentVertex.s |= entry.params[1] << 8;
gx->currentVertex.t = entry.params[2];
gx->currentVertex.t |= entry.params[3] << 8;
if (DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams) == 1) {
gx->currentVertex.vs = _dotTexture(&gx->currentVertex, 1, &gx->texMatrix.m[0]);
gx->currentVertex.vt = _dotTexture(&gx->currentVertex, 1, &gx->texMatrix.m[1]);
}
break;
case DS_GX_CMD_VTX_16: {
int16_t x = gx->activeEntries[0].params[0];
@ -1312,6 +1333,44 @@ static void _fifoRun(struct mTiming* timing, void* context, uint32_t cyclesLate)
_emitVertex(gx, gx->currentVertex.x + (x >> 6), gx->currentVertex.y + (y >> 6), gx->currentVertex.z + (z >> 6));
break;
}
case DS_GX_CMD_DIF_AMB:
gx->diffuse = entry.params[0];
gx->diffuse |= entry.params[1] << 8;
if (gx->diffuse & 0x8000) {
gx->currentVertex.color = gx->diffuse;
}
gx->ambient = entry.params[2];
gx->ambient |= entry.params[3] << 8;
break;
case DS_GX_CMD_SPE_EMI:
gx->specular = entry.params[0];
gx->specular |= entry.params[1] << 8;
gx->emit = entry.params[2];
gx->emit |= entry.params[3] << 8;
break;
case DS_GX_CMD_LIGHT_VECTOR: {
uint32_t xyz = entry.params[0];
xyz |= entry.params[1] << 8;
xyz |= entry.params[2] << 16;
xyz |= entry.params[3] << 24;
struct DSGXLight* light = &gx->lights[xyz >> 30];
int16_t x = (xyz << 6) & 0xFFC0;
int16_t y = (xyz >> 4) & 0xFFC0;
int16_t z = (xyz >> 14) & 0xFFC0;
light->x = x >> 6;
light->y = y >> 6;
light->z = z >> 6;
light->x = _dotFrac(x, y, z, &gx->vecMatrix.m[0]) << 22 >> 22;
light->y = _dotFrac(x, y, z, &gx->vecMatrix.m[1]) << 22 >> 22;
light->z = _dotFrac(x, y, z, &gx->vecMatrix.m[2]) << 22 >> 22;
break;
}
case DS_GX_CMD_LIGHT_COLOR: {
struct DSGXLight* light = &gx->lights[entry.params[3] >> 6];
light->color = entry.params[0];
light->color |= entry.params[1] << 8;
break;
}
case DS_GX_CMD_POLYGON_ATTR:
gx->nextPoly.polyParams = entry.params[0];
gx->nextPoly.polyParams |= entry.params[1] << 8;