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Voodoo stippling support for 3D

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This commit is contained in:
Cacodemon345
2025-12-21 22:00:24 +06:00
parent 2ad2579d42
commit e59bb4dc2e
4 changed files with 120 additions and 8 deletions
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26
src/video/vid_voodoo_fb.c
View File

@@ -254,6 +254,19 @@ voodoo_fb_writew(uint32_t addr, uint16_t val, void *priv)
int colbfog_g = 0;
int colbfog_b = 0;
if (params->fbzMode & FBZ_STIPPLE) {
if (params->fbzMode & FBZ_STIPPLE_PATT) {
int index = ((y & 3) << 3) | (~x & 7);
if (!(params->stipple & (1 << index)))
goto skip_pixel;
} else {
voodoo->params.stipple = (voodoo->params.stipple << 1) | (voodoo->params.stipple >> 31);
if (!(voodoo->params.stipple & 0x80000000)) {
goto skip_pixel;
}
}
}
if (params->fbzMode & FBZ_DEPTH_ENABLE) {
uint16_t old_depth = *(uint16_t *) (&voodoo->fb_mem[write_addr_aux & voodoo->fb_mask]);
@@ -449,6 +462,19 @@ voodoo_fb_writel(uint32_t addr, uint32_t val, void *priv)
int colbfog_g = 0;
int colbfog_b = 0;
if (params->fbzMode & FBZ_STIPPLE) {
if (params->fbzMode & FBZ_STIPPLE_PATT) {
int index = ((y & 3) << 3) | (~(x + c) & 7);
if (!(params->stipple & (1 << index)))
goto skip_pixel;
} else {
voodoo->params.stipple = (voodoo->params.stipple << 1) | (voodoo->params.stipple >> 31);
if (!(voodoo->params.stipple & 0x80000000)) {
goto skip_pixel;
}
}
}
if (params->fbzMode & FBZ_DEPTH_ENABLE) {
uint16_t old_depth = *(uint16_t *) (&voodoo->fb_mem[write_addr_aux & voodoo->fb_mask]);

17
src/video/vid_voodoo_render.c
View File

@@ -88,6 +88,8 @@ typedef struct voodoo_state_t {
uint32_t texBaseAddr;
int lod_frac[2];
int stipple;
} voodoo_state_t;
#ifdef ENABLE_VOODOO_RENDER_LOG
@@ -990,6 +992,20 @@ voodoo_half_triangle(voodoo_t *voodoo, voodoo_params_t *params, voodoo_state_t *
w_depth = 0xffff;
}
if (params->fbzMode & FBZ_STIPPLE) {
if (params->fbzMode & FBZ_STIPPLE_PATT) {
int index = ((real_y & 3) << 3) | (~x & 7);
if (!(state->stipple & (1 << index)))
goto skip_pixel;
} else {
state->stipple = (state->stipple << 1) | (state->stipple >> 31);
if (!(state->stipple & 0x80000000)) {
goto skip_pixel;
}
}
}
#if 0
w_depth = CLAMP16(w_depth);
#endif
@@ -1560,6 +1576,7 @@ voodoo_render_log("voodoo_triangle %i %i %i : vA %f, %f vB %f, %f vC %f, %f f
if (lodbias & 0x20)
lodbias |= ~0x3f;
state.tmu[1].lod = LOD + (lodbias << 6);
state.stipple = params->stipple;
voodoo_half_triangle(voodoo, params, &state, vertexAy_adjusted, vertexCy_adjusted, odd_even);
}