static void ExpandBezier(int &count, int op, const std::vector<SimpleVertex> &simpleVerts, const std::vector<u16> &indices, std::vector<SimpleVertex> &generatedVerts, std::vector<u16> &generatedInds) {
int count_u = (op & 0x00FF) >> 0;
int count_v = (op & 0xFF00) >> 8;
int tess_u = gstate.getPatchDivisionU();
int tess_v = gstate.getPatchDivisionV();
if (tess_u < 1) {
tess_u = 1;
}
if (tess_v < 1) {
tess_v = 1;
}
// Bezier patches share less control points than spline patches. Otherwise they are pretty much the same (except bezier don't support the open/close thing)
int num_patches_u = (count_u - 1) / 3;
int num_patches_v = (count_v - 1) / 3;
int total_patches = num_patches_u * num_patches_v;
std::vector<BezierPatch> patches;
patches.resize(total_patches);
for (int patch_u = 0; patch_u < num_patches_u; patch_u++) {
for (int patch_v = 0; patch_v < num_patches_v; patch_v++) {
BezierPatch &patch = patches[patch_u + patch_v * num_patches_u];
for (int point = 0; point < 16; ++point) {
int idx = (patch_u * 3 + point % 4) + (patch_v * 3 + point / 4) * count_u;
patch.points[point] = &simpleVerts[0] + (!indices.empty() ? indices[idx] : idx);
}
patch.u_index = patch_u * 3;
patch.v_index = patch_v * 3;
patch.index = patch_v * num_patches_u + patch_u;
patch.primType = gstate.getPatchPrimitiveType();
patch.computeNormals = false;
patch.patchFacing = false;
}
}
generatedVerts.resize((tess_u + 1) * (tess_v + 1) * total_patches);
generatedInds.resize(tess_u * tess_v * 6 * total_patches);
count = 0;
u8 *dest = (u8 *)&generatedVerts[0];
u16 *inds = &generatedInds[0];
for (int patch_idx = 0; patch_idx < total_patches; ++patch_idx) {
const BezierPatch &patch = patches[patch_idx];
TessellateBezierPatch(dest, inds, count, tess_u, tess_v, patch, gstate.vertType);
}
}
void DrawEngineCommon::SubmitBezier(const void *control_points, const void *indices, int tess_u, int tess_v, int count_u, int count_v, GEPatchPrimType prim_type, bool computeNormals, bool patchFacing, u32 vertType, int *bytesRead) {
PROFILE_THIS_SCOPE("bezier");
DispatchFlush();
u16 index_lower_bound = 0;
u16 index_upper_bound = count_u * count_v - 1;
IndexConverter idxConv(vertType, indices);
if (indices)
GetIndexBounds(indices, count_u*count_v, vertType, &index_lower_bound, &index_upper_bound);
VertexDecoder *origVDecoder = GetVertexDecoder((vertType & 0xFFFFFF) | (gstate.getUVGenMode() << 24));
*bytesRead = count_u * count_v * origVDecoder->VertexSize();
// Real hardware seems to draw nothing when given < 4 either U or V.
// This would result in num_patches_u / num_patches_v being 0.
if (count_u < 4 || count_v < 4) {
return;
}
// Simplify away bones and morph before proceeding
// There are normally not a lot of control points so just splitting decoded should be reasonably safe, although not great.
SimpleVertex *simplified_control_points = (SimpleVertex *)(decoded + 65536 * 12);
u8 *temp_buffer = decoded + 65536 * 18;
u32 origVertType = vertType;
vertType = NormalizeVertices((u8 *)simplified_control_points, temp_buffer, (u8 *)control_points, index_lower_bound, index_upper_bound, vertType);
VertexDecoder *vdecoder = GetVertexDecoder(vertType);
int vertexSize = vdecoder->VertexSize();
if (vertexSize != sizeof(SimpleVertex)) {
ERROR_LOG(G3D, "Something went really wrong, vertex size: %i vs %i", vertexSize, (int)sizeof(SimpleVertex));
}
float *pos = (float*)(decoded + 65536 * 18); // Size 4 float
float *tex = pos + count_u * count_v * 4; // Size 4 float
float *col = tex + count_u * count_v * 4; // Size 4 float
const bool hasColor = (origVertType & GE_VTYPE_COL_MASK) != 0;
const bool hasTexCoords = (origVertType & GE_VTYPE_TC_MASK) != 0;
// Bezier patches share less control points than spline patches. Otherwise they are pretty much the same (except bezier don't support the open/close thing)
int num_patches_u = (count_u - 1) / 3;
int num_patches_v = (count_v - 1) / 3;
BezierPatch *patches = nullptr;
if (g_Config.bHardwareTessellation && g_Config.bHardwareTransform && !g_Config.bSoftwareRendering) {
int posStride, texStride, colStride;
tessDataTransfer->PrepareBuffers(pos, tex, col, posStride, texStride, colStride, count_u * count_v, hasColor, hasTexCoords);
float *p = pos;
float *t = tex;
float *c = col;
for (int idx = 0; idx < count_u * count_v; idx++) {
SimpleVertex *point = simplified_control_points + (indices ? idxConv.convert(idx) : idx);
memcpy(p, point->pos.AsArray(), 3 * sizeof(float));
p += posStride;
if (hasTexCoords) {
memcpy(t, point->uv, 2 * sizeof(float));
t += texStride;
}
if (hasColor) {
memcpy(c, Vec4f::FromRGBA(point->color_32).AsArray(), 4 * sizeof(float));
c += colStride;
}
}
if (!hasColor) {
SimpleVertex *point = simplified_control_points + (indices ? idxConv.convert(0) : 0);
memcpy(col, Vec4f::FromRGBA(point->color_32).AsArray(), 4 * sizeof(float));
}
} else {
patches = new BezierPatch[num_patches_u * num_patches_v];
for (int patch_u = 0; patch_u < num_patches_u; patch_u++) {
for (int patch_v = 0; patch_v < num_patches_v; patch_v++) {
BezierPatch& patch = patches[patch_u + patch_v * num_patches_u];
for (int point = 0; point < 16; ++point) {
int idx = (patch_u * 3 + point % 4) + (patch_v * 3 + point / 4) * count_u;
patch.points[point] = simplified_control_points + (indices ? idxConv.convert(idx) : idx);
}
patch.u_index = patch_u * 3;
patch.v_index = patch_v * 3;
patch.index = patch_v * num_patches_u + patch_u;
patch.primType = prim_type;
patch.computeNormals = computeNormals;
patch.patchFacing = patchFacing;
}
}
}
int count = 0;
u8 *dest = splineBuffer;
// We shouldn't really split up into separate 4x4 patches, instead we should do something that works
// like the splines, so we subdivide across the whole "mega-patch".
// If specified as 0, uses 1.
if (tess_u < 1) {
tess_u = 1;
}
if (tess_v < 1) {
tess_v = 1;
}
u16 *inds = quadIndices_;
if (g_Config.bHardwareTessellation && g_Config.bHardwareTransform && !g_Config.bSoftwareRendering) {
tessDataTransfer->SendDataToShader(pos, tex, col, count_u * count_v, hasColor, hasTexCoords);
TessellateBezierPatchHardware(dest, inds, count, tess_u, tess_v, prim_type);
numPatches = num_patches_u * num_patches_v;
} else {
int maxVertices = SPLINE_BUFFER_SIZE / vertexSize;
// Downsample until it fits, in case crazy tessellation factors are sent.
while ((tess_u + 1) * (tess_v + 1) * num_patches_u * num_patches_v > maxVertices) {
tess_u /= 2;
tess_v /= 2;
}
for (int patch_idx = 0; patch_idx < num_patches_u*num_patches_v; ++patch_idx) {
const BezierPatch &patch = patches[patch_idx];
TessellateBezierPatch(dest, inds, count, tess_u, tess_v, patch, origVertType);
}
delete[] patches;
}
u32 vertTypeWithIndex16 = (vertType & ~GE_VTYPE_IDX_MASK) | GE_VTYPE_IDX_16BIT;
UVScale prevUVScale;
if (origVertType & GE_VTYPE_TC_MASK) {
// We scaled during Normalize already so let's turn it off when drawing.
prevUVScale = gstate_c.uv;
gstate_c.uv.uScale = 1.0f;
gstate_c.uv.vScale = 1.0f;
gstate_c.uv.uOff = 0;
gstate_c.uv.vOff = 0;
}
uint32_t vertTypeID = GetVertTypeID(vertTypeWithIndex16, gstate.getUVGenMode());
int generatedBytesRead;
DispatchSubmitPrim(splineBuffer, quadIndices_, primType[prim_type], count, vertTypeID, &generatedBytesRead);
DispatchFlush();
if (origVertType & GE_VTYPE_TC_MASK) {
gstate_c.uv = prevUVScale;
}
}
