diff options
| -rw-r--r-- | src/gallium/drivers/cell/spu/spu_main.c | 5 | ||||
| -rw-r--r-- | src/gallium/drivers/cell/spu/spu_main.h | 5 | ||||
| -rw-r--r-- | src/gallium/drivers/cell/spu/spu_per_fragment_op.c | 34 |
3 files changed, 23 insertions, 21 deletions
diff --git a/src/gallium/drivers/cell/spu/spu_main.c b/src/gallium/drivers/cell/spu/spu_main.c index d223f32d941..c4236817a9a 100644 --- a/src/gallium/drivers/cell/spu/spu_main.c +++ b/src/gallium/drivers/cell/spu/spu_main.c @@ -252,12 +252,17 @@ cmd_state_framebuffer(const struct cell_command_framebuffer *cmd) switch (spu.fb.depth_format) { case PIPE_FORMAT_Z32_UNORM: + spu.fb.zsize = 4; + spu.fb.zscale = (float) 0xffffffffu; + break; case PIPE_FORMAT_Z24S8_UNORM: case PIPE_FORMAT_S8Z24_UNORM: spu.fb.zsize = 4; + spu.fb.zscale = (float) 0x00ffffffu; break; case PIPE_FORMAT_Z16_UNORM: spu.fb.zsize = 2; + spu.fb.zscale = (float) 0xffffu; break; default: spu.fb.zsize = 0; diff --git a/src/gallium/drivers/cell/spu/spu_main.h b/src/gallium/drivers/cell/spu/spu_main.h index 4879f8c9c8d..c2a53c9dcf6 100644 --- a/src/gallium/drivers/cell/spu/spu_main.h +++ b/src/gallium/drivers/cell/spu/spu_main.h @@ -41,6 +41,10 @@ #define MAX_HEIGHT 1024 +/** + * A tile is basically a TILE_SIZE x TILE_SIZE block of 4-byte pixels. + * The data may be addressed through several different types. + */ typedef union { ushort us[TILE_SIZE][TILE_SIZE]; uint ui[TILE_SIZE][TILE_SIZE]; @@ -99,6 +103,7 @@ struct spu_framebuffer { uint depth_clear_value; uint zsize; /**< 0, 2 or 4 bytes per Z */ + float zscale; /**< 65535.0, 2^24-1 or 2^32-1 */ } ALIGN16_ATTRIB; diff --git a/src/gallium/drivers/cell/spu/spu_per_fragment_op.c b/src/gallium/drivers/cell/spu/spu_per_fragment_op.c index db887352265..29dc07a2e8d 100644 --- a/src/gallium/drivers/cell/spu/spu_per_fragment_op.c +++ b/src/gallium/drivers/cell/spu/spu_per_fragment_op.c @@ -144,18 +144,22 @@ write_ds_quad(tile_t *buffer, unsigned x, unsigned y, case PIPE_FORMAT_Z24S8_UNORM: { qword *ptr = (qword *) &buffer->ui4[iy][ix]; + /* form select mask = 1110,1110,1110,1110 */ qword mask = si_fsmbi(0xEEEE); - + /* depth[i] = depth[i] << 8 */ depth = si_shli(depth, 8); + /* *ptr[i] = depth[i][31:8] | stencil[i][7:0] */ *ptr = si_selb(stencil, depth, mask); break; } case PIPE_FORMAT_S8Z24_UNORM: { qword *ptr = (qword *) &buffer->ui4[iy][ix]; + /* form select mask = 0111,0111,0111,0111 */ qword mask = si_fsmbi(0x7777); - + /* stencil[i] = stencil[i] << 24 */ stencil = si_shli(stencil, 24); + /* *ptr[i] = stencil[i][31:24] | depth[i][23:0] */ *ptr = si_selb(stencil, depth, mask); break; } @@ -191,25 +195,13 @@ spu_do_depth_stencil(int x, int y, read_ds_quad(&spu.ztile, x, y, spu.fb.depth_format, &pixel_depth, &pixel_stencil); } - - switch (spu.fb.depth_format) { - case PIPE_FORMAT_Z16_UNORM: - frag_depth = si_fm(frag_depth, (qword)spu_splats((float)(0x0000ffffu))); - frag_depth = si_cfltu(frag_depth, 0); - break; - case PIPE_FORMAT_Z32_UNORM: - frag_depth = si_fm(frag_depth, (qword)spu_splats((float)(0xffffffffu))); - frag_depth = si_cfltu(frag_depth, 0); - break; - case PIPE_FORMAT_Z24S8_UNORM: - case PIPE_FORMAT_S8Z24_UNORM: - frag_depth = si_fm(frag_depth, (qword)spu_splats((float)(0x00ffffffu))); - frag_depth = si_cfltu(frag_depth, 0); - break; - default: - ASSERT(0); - break; - } + + /* convert floating point Z values to 32-bit uint */ + + /* frag_depth *= spu.fb.zscale */ + frag_depth = si_fm(frag_depth, (qword)spu_splats(spu.fb.zscale)); + /* frag_depth = uint(frag_depth) */ + frag_depth = si_cfltu(frag_depth, 0); result = (*spu.frag_test)(frag_mask, pixel_depth, pixel_stencil, frag_depth, frag_alpha, facing); |