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r300: Document registers 0x2220 to 0x2230.

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These registers are per-pixel and per-vertex X and Y clipping planes.
This commit is contained in:
Oliver McFadden
2007-05-28 01:11:54 +00:00
parent 779a5c160f
commit 97a89227b0
4 changed files with 17 additions and 7 deletions
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src/mesa/drivers/dri/r300/r300_cmdbuf.c
+2 -2
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@@ -318,8 +318,8 @@ void r300InitCmdBuf(r300ContextPtr r300)
r300->hw.unk21DC.cmd[0] = cmdpacket0(0x21DC, 1);
ALLOC_STATE(unk221C, always, 2, 0);
r300->hw.unk221C.cmd[0] = cmdpacket0(R300_VAP_UNKNOWN_221C, 1);
ALLOC_STATE(unk2220, always, 5, 0);
r300->hw.unk2220.cmd[0] = cmdpacket0(0x2220, 4);
ALLOC_STATE(vap_clip, always, 5, 0);
r300->hw.vap_clip.cmd[0] = cmdpacket0(R300_VAP_CLIP_X_0, 4);
ALLOC_STATE(unk2288, always, 2, 0);
r300->hw.unk2288.cmd[0] = cmdpacket0(R300_VAP_UNKNOWN_2288, 1);
ALLOC_STATE(vof, always, R300_VOF_CMDSIZE, 0);
src/mesa/drivers/dri/r300/r300_context.h
+1 -1
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@@ -452,7 +452,7 @@ struct r300_hw_state {
struct r300_state_atom vic; /* vap input control (2180) */
struct r300_state_atom unk21DC; /* (21DC) */
struct r300_state_atom unk221C; /* (221C) */
struct r300_state_atom unk2220; /* (2220) */
struct r300_state_atom vap_clip;
struct r300_state_atom unk2288; /* (2288) */
struct r300_state_atom pvs; /* pvs_cntl (22D0) */
struct r300_state_atom gb_enable; /* (4008) */
src/mesa/drivers/dri/r300/r300_reg.h
+10
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@@ -299,6 +299,16 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
# define R300_221C_NORMAL 0x00000000
# define R300_221C_CLEAR 0x0001C000
/* These seem to be per-pixel and per-vertex X and Y clipping planes. The first
* plane is per-pixel and the second plane is per-vertex.
*
* This was determined by experimentation alone but I believe it is correct.
*/
#define R300_VAP_CLIP_X_0 0x2220
#define R300_VAP_CLIP_X_1 0x2224
#define R300_VAP_CLIP_Y_0 0x2228
#define R300_VAP_CLIP_Y_1 0x2230
/* gap */
/* Sometimes, END_OF_PKT and 0x2284=0 are the only commands sent between
src/mesa/drivers/dri/r300/r300_state.c
+4 -4
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@@ -1882,10 +1882,10 @@ static void r300ResetHwState(r300ContextPtr r300)
r300->hw.unk221C.cmd[1] = R300_221C_NORMAL;
r300->hw.unk2220.cmd[1] = r300PackFloat32(1.0);
r300->hw.unk2220.cmd[2] = r300PackFloat32(1.0);
r300->hw.unk2220.cmd[3] = r300PackFloat32(1.0);
r300->hw.unk2220.cmd[4] = r300PackFloat32(1.0);
r300->hw.vap_clip.cmd[1] = r300PackFloat32(1.0); /* X */
r300->hw.vap_clip.cmd[2] = r300PackFloat32(1.0); /* X */
r300->hw.vap_clip.cmd[3] = r300PackFloat32(1.0); /* Y */
r300->hw.vap_clip.cmd[4] = r300PackFloat32(1.0); /* Y */
/* XXX: Other families? */
switch (r300->radeon.radeonScreen->chip_family) {