port: clean up depth_zfar remnants

port/fast3d/gfx_pc.cpp

@@ -125,8 +125,6 @@ static struct RSP {
     float aspect_ofs;
     float aspect_scale;
 
-    //float depth_zfar;
-
     struct {
         // U0.16
         uint16_t s, t;
@@ -198,7 +196,6 @@ static struct RDP {
 
 static struct RenderingState {
     uint8_t depth_mode;
-    //float depth_zfar;
     bool alpha_blend;
     bool modulate;
     struct XYWidthHeight viewport, scissor;
@@ -1239,12 +1236,6 @@ static void gfx_sp_tri1(uint8_t vtx1_idx, uint8_t vtx2_idx, uint8_t vtx3_idx, bo
         }
     }
 
-    // if (rsp.depth_zfar != rendering_state.depth_zfar) {
-    //     gfx_flush();
-    //     gfx_rapi->set_depth_range(0.0f, rsp.depth_zfar);
-    //     rendering_state.depth_zfar = rsp.depth_zfar;
-    // }
-
     bool depth_test = ((rsp.geometry_mode & G_ZBUFFER) == G_ZBUFFER || (rdp.other_mode_l & G_ZS_PRIM) == G_ZS_PRIM) &&
                       ((rdp.other_mode_h & G_CYC_1CYCLE) == G_CYC_1CYCLE || (rdp.other_mode_h & G_CYC_2CYCLE) == G_CYC_2CYCLE);
     bool depth_update = (rdp.other_mode_l & Z_UPD) == Z_UPD;
@@ -1731,18 +1722,6 @@ static void gfx_sp_moveword(uint8_t index, uint16_t offset, uintptr_t data) {
         case G_MW_SEGMENT:
             segmentPointers[(offset >> 2) & 0xff] = data;
             break;
-        case G_MW_PERSPNORM:
-            // the default z range is around [100, 10000]
-            // data is 2 / (znear + zfar) represented as a 0.16 fixed point
-            // => (znear + zfar) = (2 / (data / 65536)) = 131072 / data
-            // constexpr float full_range_mul = 1.f / 11000.f; // that's around the biggest value I got when testing
-            // if (data == 0) {
-            //     rsp.depth_zfar = 1.f;
-            // } else {
-            //     // sometimes this will overshoot 1 but GL can handle that
-            //     rsp.depth_zfar =((131072.f * full_range_mul) / (float)data);
-            // }
-            break;
     }
 }
 
@@ -2556,8 +2535,6 @@ extern "C" void gfx_init(const GfxInitSettings *settings) {
         tex_upload_buffer = (uint8_t*)malloc(max_tex_size * max_tex_size * 4);
     }
 
-    //rsp.depth_zfar = 1.0f;
-
     rsp.lookat[0].dir[0] = rsp.lookat[1].dir[1] = 0x7F;
     rsp.current_lookat_coeffs[0][0] = rsp.current_lookat_coeffs[1][1] = 1.f;
     rsp.lookat_enabled = true;