st/nine: Enable shadow mapping for ps 1.X

We didn't implement shadow textures for ps 1.X,
assuming the case couldn't happen...
Well it does.

Fixes: https://github.com/iXit/Mesa-3D/issues/261

Signed-off-by: Axel Davy <davyaxel0@gmail.com>

3 files changed, 14 insertions, 10 deletions

diff --git a/src/gallium/state_trackers/nine/nine_shader.c b/src/gallium/state_trackers/nine/nine_shader.c
index 2b11958b261..145647bc3f8 100644
--- a/src/gallium/state_trackers/nine/nine_shader.c
+++ b/src/gallium/state_trackers/nine/nine_shader.c
@@ -771,12 +771,13 @@ TEX_with_ps1x_projection(struct shader_translator *tx, struct ureg_dst dst,
 {
     unsigned dim = 1 + ((tx->info->projected >> (2 * idx)) & 3);
     struct ureg_dst tmp;
+    boolean shadow = !!(tx->info->sampler_mask_shadow & (1 << idx));
 
     /* dim == 1: no projection
      * Looks like must be disabled when it makes no
      * sense according the texture dimensions
      */
-    if (dim == 1 || dim <= target) {
+    if (dim == 1 || (dim <= target && !shadow)) {
         ureg_TEX(tx->ureg, dst, target, src0, src1);
     } else if (dim == 4) {
         ureg_TXP(tx->ureg, dst, target, src0, src1);
@@ -2107,9 +2108,10 @@ d3dstt_to_tgsi_tex_shadow(BYTE sampler_type)
 static inline unsigned
 ps1x_sampler_type(const struct nine_shader_info *info, unsigned stage)
 {
+    boolean shadow = !!(info->sampler_mask_shadow & (1 << stage));
     switch ((info->sampler_ps1xtypes >> (stage * 2)) & 0x3) {
-    case 1: return TGSI_TEXTURE_1D;
-    case 0: return TGSI_TEXTURE_2D;
+    case 1: return shadow ? TGSI_TEXTURE_SHADOW1D : TGSI_TEXTURE_1D;
+    case 0: return shadow ? TGSI_TEXTURE_SHADOW2D : TGSI_TEXTURE_2D;
     case 3: return TGSI_TEXTURE_3D;
     default:
         return TGSI_TEXTURE_CUBE;
diff --git a/src/gallium/state_trackers/nine/pixelshader9.c b/src/gallium/state_trackers/nine/pixelshader9.c
index 6f053f709bf..5d79019a1bc 100644
--- a/src/gallium/state_trackers/nine/pixelshader9.c
+++ b/src/gallium/state_trackers/nine/pixelshader9.c
@@ -164,7 +164,7 @@ NinePixelShader9_GetVariant( struct NinePixelShader9 *This )
         info.const_b_base = NINE_CONST_B_BASE(device->max_ps_const_f) / 16;
         info.byte_code = This->byte_code.tokens;
         info.sampler_mask_shadow = key & 0xffff;
-        info.sampler_ps1xtypes = key;
+        info.sampler_ps1xtypes = (key >> 16) & 0xffff;
         info.fog_enable = device->context.rs[D3DRS_FOGENABLE];
         info.fog_mode = device->context.rs[D3DRS_FOGTABLEMODE];
         info.force_color_in_centroid = key >> 34 & 1;
diff --git a/src/gallium/state_trackers/nine/pixelshader9.h b/src/gallium/state_trackers/nine/pixelshader9.h
index accd00a6a8c..bcbadd71057 100644
--- a/src/gallium/state_trackers/nine/pixelshader9.h
+++ b/src/gallium/state_trackers/nine/pixelshader9.h
@@ -68,13 +68,16 @@ NinePixelShader9_UpdateKey( struct NinePixelShader9 *ps,
                             struct nine_context *context )
 {
     uint16_t samplers_shadow;
-    uint32_t samplers_ps1_types;
+    uint16_t samplers_ps1_types;
     uint16_t projected;
     uint64_t key;
     BOOL res;
 
+    samplers_shadow = (uint16_t)((context->samplers_shadow & NINE_PS_SAMPLERS_MASK) >> NINE_SAMPLER_PS(0));
+    key = samplers_shadow & ps->sampler_mask;
+
     if (unlikely(ps->byte_code.version < 0x20)) {
-        /* no depth textures, but variable targets */
+        /* variable targets */
         uint32_t m = ps->sampler_mask;
         samplers_ps1_types = 0;
         while (m) {
@@ -82,10 +85,9 @@ NinePixelShader9_UpdateKey( struct NinePixelShader9 *ps,
             m &= ~(1 << s);
             samplers_ps1_types |= (context->texture[s].enabled ? context->texture[s].pstype : 1) << (s * 2);
         }
-        key = samplers_ps1_types;
-    } else {
-        samplers_shadow = (uint16_t)((context->samplers_shadow & NINE_PS_SAMPLERS_MASK) >> NINE_SAMPLER_PS(0));
-        key = samplers_shadow & ps->sampler_mask;
+        /* Note: For ps 1.X, only samplers 0 1 2 and 3 are available (except 1.4 where 4 and 5 are available).
+         * Thus there is no overflow of samplers_ps1_types. */
+        key |= samplers_ps1_types << 16;
     }
 
     if (ps->byte_code.version < 0x30) {