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|
// license:BSD-3-Clause
// copyright-holders:David Haywood
#include "emu.h"
#include "k001005.h"
#include "screen.h"
/*****************************************************************************/
/* Konami K001005 Polygon Renderer (KS10071) */
/***************************************************************************/
/* */
/* 001005 */
/* */
/***************************************************************************/
/*
TODO:
- Winding Heat (and maybe others) have slight Z-fighting problems.
- Player car shadow not visible in Winding Heat. Hidden by road, needs polygon priority or something similar?
*/
#define LOG_POLY_FIFO 0
k001005_renderer::k001005_renderer(device_t &parent, screen_device &screen, device_t *k001006)
: poly_manager<float, k001005_polydata, 10>(screen.machine())
{
m_k001006 = k001006;
int width = 512;
int height = 384;
m_fb[0] = std::make_unique<bitmap_rgb32>( width, height);
m_fb[1] = std::make_unique<bitmap_rgb32>( width, height);
m_zb = std::make_unique<bitmap_ind32>(width, height);
m_3dfifo = std::make_unique<uint32_t[]>(0x10000);
m_3dfifo_ptr = 0;
m_fb_page = 0;
m_cliprect = rectangle(0, width-1, 0, height-1);
for (int k=0; k < 8; k++)
{
m_tex_mirror_table[0][k] = std::make_unique<int[]>(128);
m_tex_mirror_table[1][k] = std::make_unique<int[]>(128);
int size = (k+1)*8;
for (int i=0; i < 128; i++)
{
m_tex_mirror_table[0][k][i] = i % size;
m_tex_mirror_table[1][k][i] = (i % (size*2)) >= size ? ((size - 1) - (i % size)) : (i % size);
}
}
// save state
parent.save_pointer(NAME(m_3dfifo), 0x10000);
parent.save_item(NAME(m_3dfifo_ptr));
parent.save_item(NAME(*m_fb[0]));
parent.save_item(NAME(*m_fb[1]));
parent.save_item(NAME(*m_zb));
parent.save_item(NAME(m_fb_page));
parent.save_item(NAME(m_light_r));
parent.save_item(NAME(m_light_g));
parent.save_item(NAME(m_light_b));
parent.save_item(NAME(m_ambient_r));
parent.save_item(NAME(m_ambient_g));
parent.save_item(NAME(m_ambient_b));
parent.save_item(NAME(m_fog_r));
parent.save_item(NAME(m_fog_g));
parent.save_item(NAME(m_fog_b));
parent.save_item(NAME(m_far_z));
parent.save_item(NAME(m_fog_start_z));
parent.save_item(NAME(m_fog_end_z));
parent.save_item(NAME(m_reg_fog_start));
parent.save_item(NAME(m_viewport_min_x));
parent.save_item(NAME(m_viewport_max_x));
parent.save_item(NAME(m_viewport_min_y));
parent.save_item(NAME(m_viewport_max_y));
parent.save_item(NAME(m_viewport_center_x));
parent.save_item(NAME(m_viewport_center_y));
}
void k001005_renderer::reset()
{
m_3dfifo_ptr = 0;
m_vertexb_ptr = 0;
}
void k001005_renderer::push_data(uint32_t data)
{
// process the current vertex data if a sync command is being sent (usually means the global registers are being changed)
if (data == 0x80000000)
{
render_polygons();
}
m_3dfifo[m_3dfifo_ptr++] = data;
}
void k001005_renderer::swap_buffers()
{
m_fb_page ^= 1;
m_fb[m_fb_page]->fill(0, m_cliprect);
float zvalue = 10000000000.0f;
m_zb->fill(*(int*)&zvalue, m_cliprect);
}
bool k001005_renderer::fifo_filled()
{
return m_3dfifo_ptr > 0;
}
template<bool UseTexture, bool UseVertexColor>
void k001005_renderer::draw_scanline_generic(int32_t scanline, const extent_t& extent, const k001005_polydata& extradata, int threadid)
{
float u, v, w, du, dv, dw;
float r, g, b, a, dr, dg, db, da;
k001006_device* k001006 = downcast<k001006_device*>(m_k001006);
uint32_t* const fb = &m_fb[m_fb_page]->pix(scanline);
float* const zb = (float*)&m_zb->pix(scanline);
float z = extent.param[POLY_Z].start;
float dz = extent.param[POLY_Z].dpdx;
float diff = extent.param[POLY_DIFF].start;
float ddiff = extent.param[POLY_DIFF].dpdx;
float fog = extent.param[POLY_FOG].start;
float dfog = extent.param[POLY_FOG].dpdx;
if (UseTexture)
{
u = extent.param[POLY_U].start;
v = extent.param[POLY_V].start;
w = extent.param[POLY_W].start;
du = extent.param[POLY_U].dpdx;
dv = extent.param[POLY_V].dpdx;
dw = extent.param[POLY_W].dpdx;
}
if (UseVertexColor)
{
r = extent.param[POLY_R].start;
dr = extent.param[POLY_R].dpdx;
g = extent.param[POLY_G].start;
dg = extent.param[POLY_G].dpdx;
b = extent.param[POLY_B].start;
db = extent.param[POLY_B].dpdx;
a = extent.param[POLY_A].start;
da = extent.param[POLY_A].dpdx;
}
rgbaint_t ambient_color(extradata.ambient_light);
rgbaint_t diffuse_color(extradata.diffuse_light);
rgbaint_t fog_color(extradata.fog_color);
rgbaint_t poly_color(extradata.poly_color);
int poly_color_a = (extradata.poly_color >> 24) & 0xff;
int texture_mirror_x = extradata.texture_mirror;
int texture_mirror_y = extradata.texture_mirror;
int texture_x = extradata.texture_x * 8;
int texture_y = extradata.texture_y * 8;
int texture_width = extradata.texture_width;
int texture_height = extradata.texture_height;
int tex_page = extradata.texture_page * 0x40000;
int palette_index = extradata.texture_palette * 256;
int* x_mirror_table = m_tex_mirror_table[texture_mirror_x][texture_width].get();
int* y_mirror_table = m_tex_mirror_table[texture_mirror_y][texture_height].get();
bool UseZCompare = (extradata.cmd & 4) != 0;
bool UseFBBlend = (extradata.cmd & 2) == 0;
bool UseFog = extradata.fog_enable;
bool WriteZ = true;
bool UseBilinear = k001006->bilinear_enabled();
uint32_t texel = 0;
uint32_t texel_alpha = 0;
for (int x = extent.startx; x < extent.stopx; x++)
{
if (z <= zb[x] || !UseZCompare)
{
if (UseTexture)
{
float oow = 1.0f / w;
int iu = (int)(u * oow);
int iv = (int)(v * oow);
if (!UseBilinear)
{
int texel_u = texture_x + x_mirror_table[(iu >> 4) & 0x7f];
int texel_v = texture_y + y_mirror_table[(iv >> 4) & 0x7f];
texel = k001006->fetch_texel(tex_page, palette_index, texel_u, texel_v);
texel_alpha = texel >> 24;
}
else
{
// sub-texel bias to avoid seams
iu -= 7;
iv -= 7;
int ufrac = iu & 0xf;
int vfrac = iv & 0xf;
int texel_u0 = texture_x + x_mirror_table[(iu >> 4) & 0x7f];
int texel_u1 = texture_x + x_mirror_table[((iu >> 4) + 1) & 0x7f];
int texel_v0 = texture_y + y_mirror_table[(iv >> 4) & 0x7f];
int texel_v1 = texture_y + y_mirror_table[((iv >> 4) + 1) & 0x7f];
uint32_t tex00 = k001006->fetch_texel(tex_page, palette_index, texel_u0, texel_v0);
uint32_t tex01 = k001006->fetch_texel(tex_page, palette_index, texel_u1, texel_v0);
uint32_t tex10 = k001006->fetch_texel(tex_page, palette_index, texel_u0, texel_v1);
uint32_t tex11 = k001006->fetch_texel(tex_page, palette_index, texel_u1, texel_v1);
texel = rgbaint_t::bilinear_filter(tex00, tex01, tex10, tex11, ufrac * 16, vfrac * 16);
texel_alpha = tex00 >> 24;
}
}
int idiff = std::clamp((int)(diff), 0, 255);
int ifog = std::clamp((int)(fog), 0, 255);
rgbaint_t light_color(extradata.diffuse_light);
light_color.scale_imm_and_clamp(idiff);
light_color.add(ambient_color);
light_color.clamp_to_uint8();
if (UseVertexColor)
{
int ir = std::clamp((int)(r), 0, 255);
int ig = std::clamp((int)(g), 0, 255);
int ib = std::clamp((int)(b), 0, 255);
int ia = std::clamp((int)(a), 0, 255);
if (ia != 0)
{
rgbaint_t color(ia, ir, ig, ib);
if (UseTexture && texel_alpha != 0)
{
color.set(texel);
}
color.scale_and_clamp(light_color);
if (UseFog)
{
color.blend(fog_color, ifog);
}
// framebuffer blend
if (UseFBBlend)
{
rgbaint_t fb_color(fb[x]);
color.blend(fb_color, ia);
}
fb[x] = color.to_rgba();
if (WriteZ)
zb[x] = z;
}
}
else
{
if (UseTexture)
{
if (texel_alpha != 0)
{
rgbaint_t texel_color(texel);
texel_color.scale_and_clamp(light_color);
// TODO: is there a toggle for texture blending? cmd bit 0x02 doesn't seem like it
if (UseBilinear && texel_alpha < 0xff)
{
rgbaint_t fb_color(fb[x]);
texel_color.blend(fb_color, texel_alpha);
}
if (UseFog)
{
texel_color.blend(fog_color, ifog);
}
if (UseFBBlend)
{
rgbaint_t fb_color(fb[x]);
texel_color.blend(fb_color, poly_color_a);
}
fb[x] = texel_color.to_rgba();
if (WriteZ)
zb[x] = z;
}
}
else
{
//if (poly_color_a != 0)
{
rgbaint_t color(extradata.poly_color);
color.scale_and_clamp(light_color);
if (UseFog)
{
color.blend(fog_color, ifog);
}
// framebuffer blend
if (UseFBBlend)
{
rgbaint_t fb_color(fb[x]);
color.blend(fb_color, poly_color_a);
}
fb[x] = color.to_rgba();
if (WriteZ)
zb[x] = z;
}
}
}
}
z += dz;
diff += ddiff;
fog += dfog;
if (UseVertexColor)
{
r += dr;
g += dg;
b += db;
a += da;
}
if (UseTexture)
{
u += du;
v += dv;
w += dw;
}
}
}
/*
Command
0x00: xxxxxxxx xxxxxxxx xxxxxxx- -------- 0x80000000 (exact number of bits unknown)
0x00: -------- -------- -------x -------- 0 = per-poly color, 1 = per-vertex color
0x00: -------- -------- -------- x------- ? Texture related
0x00: -------- -------- -------- -x------ Unused?
0x00: -------- -------- -------- --x----- 1 = enable smooth shading?
0x00: -------- -------- -------- ---x---- 1 = texture mirroring
0x00: -------- -------- -------- ----x--- ? Texture related
0x00: -------- -------- -------- -----x-- 1 = enable Z-buffer read
0x00: -------- -------- -------- ------x- 0 = blend enabled, 1 = disabled
0x00: -------- -------- -------- -------x 0 = per-vertex Z, 1 = per-poly Z (0x80000121 seems like an exception)
Texture header
0x01: -xxx---- -------- -------- -------- Texture palette
0x01: ----xx-- -------- -------- -------- Unknown flags, set by commands 0x7b...0x7e. Used mostly on polygons further away from camera. Some kind of depth-based effect?
0x01: ------xx x------- -------- -------- Texture width / 8 - 1
0x01: -------- -xxx---- -------- -------- Texture height / 8 - 1
0x01: -------- -------x xxxx---- -------- Texture page
0x01: -------- -------- ----x-x- x-x-x-x- Texture X / 8
0x01: -------- -------- -----x-x -x-x-x-x Texture Y / 8
*/
int k001005_renderer::parse_polygon(int index, uint32_t cmd)
{
render_delegate rd_scan_tex = render_delegate(&k001005_renderer::draw_scanline_generic<true, false>, this);
render_delegate rd_scan_vertex_color = render_delegate(&k001005_renderer::draw_scanline_generic<false, true>, this);
render_delegate rd_scan_vertex_color_tex = render_delegate(&k001005_renderer::draw_scanline_generic<true, true>, this);
render_delegate rd_scan_color = render_delegate(&k001005_renderer::draw_scanline_generic<false, false>, this);
int viewport_min_x = std::clamp(256 + m_viewport_min_x + m_viewport_center_x, m_cliprect.min_x, m_cliprect.max_x);
int viewport_max_x = std::clamp(256 + m_viewport_max_x + m_viewport_center_x + 1, m_cliprect.min_x, m_cliprect.max_x);
int viewport_min_y = std::clamp(200 + m_viewport_min_y - m_viewport_center_y, m_cliprect.min_y, m_cliprect.max_y);
int viewport_max_y = std::clamp(200 + m_viewport_max_y - m_viewport_center_y + 1, m_cliprect.min_y, m_cliprect.max_y);
rectangle cliprect(viewport_min_x, viewport_max_x, viewport_min_y, viewport_max_y);
int start_index = index;
uint32_t* fifo = m_3dfifo.get();
bool has_texture = (cmd & 0x18) != 0;
bool has_vertex_color = (cmd & 0x100) != 0;
bool has_vertex_z = !(cmd & 1) || has_vertex_color; // command 0x121 breaks the logic here, maybe vertex color enforces vertex z too?
uint32_t texture_x = 0;
uint32_t texture_y = 0;
uint32_t texture_width = 0;
uint32_t texture_height = 0;
uint32_t texture_page = 0;
uint32_t texture_palette = 0;
uint32_t tex_header = 0;
// texture header - only for textured polys
if (has_texture)
{
tex_header = fifo[index++];
texture_x = (((tex_header >> 6) & 0x20) | ((tex_header >> 5) & 0x10) | ((tex_header >> 4) & 0x8) |
((tex_header >> 3) & 0x4) | ((tex_header >> 2) & 0x2) | ((tex_header >> 1) & 0x1));
texture_y = (((tex_header >> 5) & 0x20) | ((tex_header >> 4) & 0x10) | ((tex_header >> 3) & 0x8) |
((tex_header >> 2) & 0x4) | ((tex_header >> 1) & 0x2) | (tex_header & 0x1));
texture_width = (tex_header >> 23) & 0x7;
texture_height = (tex_header >> 20) & 0x7;
texture_page = (tex_header >> 12) & 0x1f;
texture_palette = (tex_header >> 28) & 0x7;
}
while ((fifo[index] & 0xffff0000) != 0x80000000 && index < m_3dfifo_ptr)
{
k001005_polydata& extra = object_data().next();
bool last_vertex = false;
bool is_quad = false;
uint32_t polygon_color = 0;
float polygon_z = 0.0f;
uint32_t polygon_diffuse = 0;
int num_new_verts = 0;
do
{
// X/Y coords, flags - all polys have this
// -------------------------------------------------------------------------
int x = fifo[index] & 0x3fff;
x |= ((x & 0x2000) ? 0xffffc000 : 0);
int y = (fifo[index] >> 16) & 0x1fff;
y |= ((y & 0x1000) ? 0xffffe000 : 0);
m_vertexb[m_vertexb_ptr].x = ((float)(x) / 16.0f) + 256.0f;
m_vertexb[m_vertexb_ptr].y = ((float)(-y) / 16.0f) + 200.0f;
is_quad = (fifo[index] & 0x4000) != 0;
last_vertex = (fifo[index] & 0x8000) != 0;
index++;
// Z + diffuse intensity - if Z enabled
// -------------------------------------------------------------------------
if (has_vertex_z)
{
uint32_t z = fifo[index] & 0xffffff00; // 32-bit float with low 8-bits of mantissa masked out
int diffuse = fifo[index] & 0xff;
index++;
m_vertexb[m_vertexb_ptr].p[POLY_Z] = u2f(z);
m_vertexb[m_vertexb_ptr].p[POLY_DIFF] = diffuse;
m_vertexb[m_vertexb_ptr].p[POLY_W] = 1.0f / m_vertexb[m_vertexb_ptr].p[POLY_Z];
}
else
{
m_vertexb[m_vertexb_ptr].p[POLY_W] = 1.0f;
}
// textured polygons have a polygon color field after last vertex data, but before the last UV coords
// -------------------------------------------------------------------------
if (last_vertex && has_texture)
{
// polygon Z comes before the last UV coords for textured polygons
if (!has_vertex_z)
{
uint32_t z = (fifo[index] & 0x07ffff00) | 0x48000000; // like fog values, these seem to be missing the 4 upper bits of exponent
polygon_diffuse = fifo[index] & 0xff;
index++;
polygon_z = u2f(z);
}
if (!has_vertex_color)
{
polygon_color = fifo[index];
index++;
}
}
// vertex color
if (has_vertex_color)
{
uint32_t vertex_color = fifo[index];
index++;
m_vertexb[m_vertexb_ptr].p[POLY_A] = (vertex_color >> 24) & 0xff;
m_vertexb[m_vertexb_ptr].p[POLY_B] = (vertex_color >> 16) & 0xff;
m_vertexb[m_vertexb_ptr].p[POLY_G] = (vertex_color >> 8) & 0xff;
m_vertexb[m_vertexb_ptr].p[POLY_R] = vertex_color & 0xff;
}
// UV coords - only for texture polys
if (has_texture)
{
int32_t tu = (int16_t)(fifo[index] >> 16);
int32_t tv = (int16_t)(fifo[index] & 0xffff);
index++;
m_vertexb[m_vertexb_ptr].p[POLY_U] = (float)(tu) * m_vertexb[m_vertexb_ptr].p[POLY_W];
m_vertexb[m_vertexb_ptr].p[POLY_V] = (float)(tv) * m_vertexb[m_vertexb_ptr].p[POLY_W];
}
// fog
if (m_reg_fog_start == 0xffff)
{
// max fog start value means fog is off
m_vertexb[m_vertexb_ptr].p[POLY_FOG] = 0.0f;
}
else
{
float fog_factor = (m_fog_end_z - m_vertexb[m_vertexb_ptr].p[POLY_Z]) / (m_fog_end_z - m_fog_start_z);
m_vertexb[m_vertexb_ptr].p[POLY_FOG] = fog_factor * 255.0f;
}
num_new_verts++;
m_vertexb_ptr = (m_vertexb_ptr + 1) & 3;
}
while (!last_vertex && num_new_verts < 4);
// for non-textured polygons, polygon color comes after vertex data
if (!has_texture)
{
// polygon Z
if (!has_vertex_z)
{
uint32_t z = (fifo[index] & 0x07ffff00) | 0x48000000; // like fog values, these seem to be missing the 4 upper bits of exponent
polygon_diffuse = fifo[index] & 0xff;
index++;
polygon_z = u2f(z);
}
// polygon color
if (!has_vertex_color)
{
polygon_color = fifo[index];
index++;
}
}
// apply constant Z to all verts if needed
if (!has_vertex_z)
{
for (auto j = 0; j < 4; j++)
{
m_vertexb[j].p[POLY_Z] = polygon_z;
m_vertexb[j].p[POLY_DIFF] = polygon_diffuse;
}
}
extra.texture_x = texture_x;
extra.texture_y = texture_y;
extra.texture_width = texture_width;
extra.texture_height = texture_height;
extra.texture_page = texture_page;
extra.texture_palette = texture_palette;
extra.texture_mirror = (cmd & 0x10);
extra.diffuse_light = rgb_t(m_light_r, m_light_g, m_light_b);
extra.ambient_light = rgb_t(m_ambient_r, m_ambient_g, m_ambient_b);
extra.fog_color = rgb_t(m_fog_r, m_fog_g, m_fog_b);
extra.fog_enable = (m_reg_fog_start != 0xffff) && !(cmd & 1);
extra.cmd = cmd;
extra.poly_color = rgb_t((polygon_color >> 24) & 0xff, polygon_color & 0xff, (polygon_color >> 8) & 0xff, (polygon_color >> 16) & 0xff);
// If 4 new vertices were found, but no last vertex tag - we're reading garbage.
// Midnrun writes garbage after a 0x80000003 command. The data comes directly from the display list, so it seems intentional.
if (num_new_verts >= 4 && !last_vertex)
break;
// The vertex buffer is a 4-entry circular buffer.
// Each polygon has at least one new vertex. 0-3 vertices are reused based on how many new vertices were inserted.
int v0 = (m_vertexb_ptr - 4) & 3;
int v1 = (m_vertexb_ptr - 3) & 3;
int v2 = (m_vertexb_ptr - 2) & 3;
int v3 = (m_vertexb_ptr - 1) & 3;
// This fixes shading issues in the Konami logo in Solar Assault.
// Some triangle strips have different shading values compared to reused vertices, causing unintended smooth shading.
// This ensures all vertices have the same shading value.
// Bit 0x20 could be a select between flat shading and gouraud shading.
if ((cmd & 0x20) == 0 && num_new_verts < 3)
{
int last_diffuse = m_vertexb[v3].p[POLY_DIFF];
m_vertexb[v0].p[POLY_DIFF] = last_diffuse;
m_vertexb[v1].p[POLY_DIFF] = last_diffuse;
m_vertexb[v2].p[POLY_DIFF] = last_diffuse;
}
// No texture, constant color: Z, Fog, Diffuse
// Texture, constant color: Z, Fog, Diffuse, U, V, W
// Per-vertex color: Z, Fog, Diffuse, U, V, W, R, G, B, A
if (is_quad)
{
if (has_vertex_color)
{
render_triangle<10>(cliprect, has_texture ? rd_scan_vertex_color_tex : rd_scan_vertex_color, m_vertexb[v0], m_vertexb[v1], m_vertexb[v2]);
render_triangle<10>(cliprect, has_texture ? rd_scan_vertex_color_tex : rd_scan_vertex_color, m_vertexb[v2], m_vertexb[v3], m_vertexb[v0]);
}
else if (has_texture)
{
render_triangle<6>(cliprect, rd_scan_tex, m_vertexb[v0], m_vertexb[v1], m_vertexb[v2]);
render_triangle<6>(cliprect, rd_scan_tex, m_vertexb[v2], m_vertexb[v3], m_vertexb[v0]);
}
else
{
render_triangle<3>(cliprect, rd_scan_color, m_vertexb[v0], m_vertexb[v1], m_vertexb[v2]);
render_triangle<3>(cliprect, rd_scan_color, m_vertexb[v2], m_vertexb[v3], m_vertexb[v0]);
}
}
else
{
if (has_vertex_color)
{
render_triangle<10>(cliprect, has_texture ? rd_scan_vertex_color_tex : rd_scan_vertex_color, m_vertexb[v1], m_vertexb[v2], m_vertexb[v3]);
}
else if (has_texture)
{
render_triangle<6>(cliprect, rd_scan_tex, m_vertexb[v1], m_vertexb[v2], m_vertexb[v3]);
}
else
{
render_triangle<3>(cliprect, rd_scan_color, m_vertexb[v1], m_vertexb[v2], m_vertexb[v3]);
}
}
}
return index - start_index;
}
void k001005_renderer::render_polygons()
{
uint32_t* fifo = m_3dfifo.get();
int index = 0;
do
{
uint32_t cmd = fifo[index++];
if (cmd == 0x80000000 || cmd == 0x80000018)
{
}
else if ((cmd & 0xffff0000) == 0x80000000)
{
index += parse_polygon(index, cmd);
}
}
while (index < m_3dfifo_ptr);
m_3dfifo_ptr = 0;
wait();
}
void k001005_renderer::draw(bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
for (int j = cliprect.min_y; j <= cliprect.max_y; j++)
{
uint32_t *const bmp = &bitmap.pix(j);
uint32_t const *const src = &m_fb[m_fb_page^1]->pix(j-cliprect.min_y);
for (int i = cliprect.min_x; i <= cliprect.max_x; i++)
{
if (src[i-cliprect.min_x] & 0xff000000)
{
bmp[i] = src[i-cliprect.min_x];
}
}
}
}
DEFINE_DEVICE_TYPE(K001005, k001005_device, "k001005", "K001005 Polygon Renderer")
k001005_device::k001005_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, K001005, tag, owner, clock)
, device_video_interface(mconfig, *this)
, m_k001006(*this, finder_base::DUMMY_TAG)
, m_fifo(nullptr)
, m_status(0)
, m_ram_ptr(0)
, m_fifo_read_ptr(0)
, m_fifo_write_ptr(0)
{
m_ram[0] = nullptr;
m_ram[1] = nullptr;
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void k001005_device::device_start()
{
m_ram[0] = std::make_unique<uint16_t[]>(0x140000);
m_ram[1] = std::make_unique<uint16_t[]>(0x140000);
m_fifo = std::make_unique<uint32_t[]>(0x800);
m_renderer = std::make_unique<k001005_renderer>(*this, screen(), m_k001006);
save_pointer(NAME(m_ram[0]), 0x140000);
save_pointer(NAME(m_ram[1]), 0x140000);
save_pointer(NAME(m_fifo), 0x800);
save_item(NAME(m_status));
save_item(NAME(m_ram_ptr));
save_item(NAME(m_fifo_read_ptr));
save_item(NAME(m_fifo_write_ptr));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void k001005_device::device_reset()
{
m_status = 0;
m_ram_ptr = 0;
m_fifo_read_ptr = 0;
m_fifo_write_ptr = 0;
m_renderer->reset();
}
//-------------------------------------------------
// device_stop - device-specific stop
//-------------------------------------------------
void k001005_device::device_stop()
{
}
/*****************************************************************************
DEVICE HANDLERS
*****************************************************************************/
void k001005_device::swap_buffers( )
{
m_renderer->swap_buffers();
}
uint32_t k001005_device::read(address_space &space, offs_t offset, uint32_t mem_mask)
{
adsp21062_device *dsp = downcast<adsp21062_device*>(&space.device());
switch(offset)
{
case 0x000: // FIFO read, high 16 bits
{
//osd_printf_debug("FIFO_r0: %08X\n", m_fifo_read_ptr);
uint16_t value = m_fifo[m_fifo_read_ptr] >> 16;
return value;
}
case 0x001: // FIFO read, low 16 bits
{
//osd_printf_debug("FIFO_r1: %08X\n", m_fifo_read_ptr);
uint16_t value = m_fifo[m_fifo_read_ptr] & 0xffff;
if (m_status != 1 && m_status != 2)
{
if (m_fifo_read_ptr < 0x3ff)
{
dsp->set_flag_input(1, CLEAR_LINE);
}
else
{
dsp->set_flag_input(1, ASSERT_LINE);
}
}
else
{
dsp->set_flag_input(1, ASSERT_LINE);
}
m_fifo_read_ptr++;
m_fifo_read_ptr &= 0x7ff;
return value;
}
case 0x11b: // status ?
return 0x8002;
case 0x11c: // slave status ?
return 0x8000;
case 0x11f:
if (m_ram_ptr >= 0x400000)
{
return m_ram[1][(m_ram_ptr++) & 0x3fffff];
}
else
{
return m_ram[0][(m_ram_ptr++) & 0x3fffff];
}
default:
//osd_printf_debug("%s m_r: %08X, %08X\n", machine().describe_context(), offset, mem_mask);
break;
}
return 0;
}
void k001005_device::write(address_space &space, offs_t offset, uint32_t data, uint32_t mem_mask)
{
adsp21062_device *dsp = downcast<adsp21062_device*>(&space.device());
switch (offset)
{
case 0x000: // FIFO write
{
//osd_printf_debug("%s K001005 FIFO write: %08X\n", machine().describe_context(), data);
if (m_status != 1 && m_status != 2)
{
if (m_fifo_write_ptr < 0x400)
{
dsp->set_flag_input(1, ASSERT_LINE);
}
else
{
dsp->set_flag_input(1, CLEAR_LINE);
}
}
else
{
dsp->set_flag_input(1, ASSERT_LINE);
}
// osd_printf_debug("%s K001005 FIFO write: %08X\n", machine().describe_context(), data);
m_fifo[m_fifo_write_ptr] = data;
m_fifo_write_ptr++;
m_fifo_write_ptr &= 0x7ff;
m_renderer->push_data(data);
// !!! HACK to get past the FIFO B test (GTI Club & Thunder Hurricane) !!!
if (dsp->pc() == 0x201ee)
{
// This is used to make the SHARC timeout
dsp->spin_until_trigger(10000);
}
// !!! HACK to get past the FIFO B test (Winding Heat & Midnight Run) !!!
if (dsp->pc() == 0x201e6)
{
// This is used to make the SHARC timeout
dsp->spin_until_trigger(10000);
}
break;
}
case 0x100: break;
case 0x101: break; // framebuffer width?
case 0x102: break; // framebuffer height?
case 0x103: m_renderer->m_viewport_min_x = data & 0xffff; break;
case 0x104: m_renderer->m_viewport_max_x = data & 0xffff; break;
case 0x105: m_renderer->m_viewport_max_y = data & 0xffff; break;
case 0x106: m_renderer->m_viewport_min_y = data & 0xffff; break;
case 0x107: m_renderer->m_viewport_center_x = data & 0xffff; break;
case 0x108: m_renderer->m_viewport_center_y = data & 0xffff; break;
case 0x109: // far Z value
{
// the SHARC code throws away the bottom 11 bits of mantissa and the top 5 bits (to fit in a 16-bit register?)
m_renderer->m_far_z = u2f((data & 0xffff) << 11);
break;
}
case 0x10a: m_renderer->m_light_r = data & 0xff; break;
case 0x10b: m_renderer->m_light_g = data & 0xff; break;
case 0x10c: m_renderer->m_light_b = data & 0xff; break;
case 0x10d: m_renderer->m_ambient_r = data & 0xff; break;
case 0x10e: m_renderer->m_ambient_g = data & 0xff; break;
case 0x10f: m_renderer->m_ambient_b = data & 0xff; break;
case 0x110: m_renderer->m_fog_r = data & 0xff; break;
case 0x111: m_renderer->m_fog_g = data & 0xff; break;
case 0x112: m_renderer->m_fog_b = data & 0xff; break;
case 0x117: // linear fog start Z
{
// 4 bits exponent + 12 bits mantissa, similar to far Z value
// value of 0xffff is used to effectively turn off fog
// reconstruct float from 16-bit data
// assuming implicit exponent 1001xxxx, sign bit 0 (z-values are all positive)
m_renderer->m_reg_fog_start = data & 0xffff;
m_renderer->m_fog_start_z = u2f((0x90000 | (data & 0xffff)) << 11);
break;
}
case 0x118: // linear fog end Z
{
// 4 bits exponent + 12 bits mantissa, similar to far Z value
m_renderer->m_fog_end_z = u2f((0x90000 | (data & 0xffff)) << 11);
break;
}
case 0x119: // 1 / (end_fog - start_fog) ?
{
// 5 bits exponent + 11 bits mantissa
break;
}
case 0x11a:
m_status = data;
m_fifo_write_ptr = 0;
m_fifo_read_ptr = 0;
if (data == 2)
{
if (m_renderer->fifo_filled())
{
m_renderer->render_polygons();
}
m_renderer->swap_buffers();
}
break;
case 0x11d:
m_fifo_write_ptr = 0;
m_fifo_read_ptr = 0;
break;
case 0x11e:
m_ram_ptr = data;
break;
case 0x11f:
if (m_ram_ptr >= 0x400000)
{
m_ram[1][(m_ram_ptr++) & 0x3fffff] = data & 0xffff;
}
else
{
m_ram[0][(m_ram_ptr++) & 0x3fffff] = data & 0xffff;
}
break;
default:
//osd_printf_debug("%s m_w: %08X, %08X, %08X\n", machine().describe_context(), data, offset, mem_mask);
break;
}
}
void k001005_device::draw( bitmap_rgb32 &bitmap, const rectangle &cliprect )
{
m_renderer->draw(bitmap, cliprect);
}
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