r300g: fix blitting between 2D NPOT mipmaps

Even though MIP filtering is not supported, we can bind an arbitrary mipmap
as the zero mipmap level.

NPOT textures now follow GL_TEXTURE_BASE_LEVEL and GL_TEXTURE_MIN_LOD.

This fixes piglit/fbo-copyteximage.

4 files changed, 51 insertions, 23 deletions

diff --git a/src/gallium/drivers/r300/r300_reg.h b/src/gallium/drivers/r300/r300_reg.h
index 60d3b600cb..6bea783f69 100644
--- a/src/gallium/drivers/r300/r300_reg.h
+++ b/src/gallium/drivers/r300/r300_reg.h
@@ -1607,6 +1607,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #	define R300_TX_FORMAT_3D		   (1 << 25)
 #	define R300_TX_FORMAT_CUBIC_MAP		   (2 << 25)
+#	define R300_TX_FORMAT_TEX_COORD_TYPE_MASK  (0x3 << 25)
 
 	/* alpha modes, convenience mostly */
 	/* if you have alpha, pick constant appropriate to the
diff --git a/src/gallium/drivers/r300/r300_state_derived.c b/src/gallium/drivers/r300/r300_state_derived.c
index c8de3e1c52..960dfdbaf0 100644
--- a/src/gallium/drivers/r300/r300_state_derived.c
+++ b/src/gallium/drivers/r300/r300_state_derived.c
@@ -592,6 +592,25 @@ static void r300_merge_textures_and_samplers(struct r300_context* r300)
             texstate->filter1 = sampler->filter1;
             texstate->border_color = sampler->border_color;
 
+            /* determine min/max levels */
+            max_level = MIN3(sampler->max_lod + view->base.first_level,
+                             tex->desc.b.b.last_level, view->base.last_level);
+            min_level = MIN2(sampler->min_lod + view->base.first_level,
+                             max_level);
+
+            if (tex->desc.is_npot && min_level > 0) {
+                /* Even though we do not implement mipmapping for NPOT
+                 * textures, we should at least honor the minimum level
+                 * which is allowed to be displayed. We do this by setting up
+                 * an i-th mipmap level as the zero level. */
+                r300_texture_setup_format_state(r300->screen, &tex->desc,
+                                                min_level,
+                                                &texstate->format);
+                texstate->format.tile_config |=
+                        tex->desc.offset_in_bytes[min_level] & 0xffffffe0;
+                assert((tex->desc.offset_in_bytes[min_level] & 0x1f) == 0);
+            }
+
             /* Assign a texture cache region. */
             texstate->format.format1 |= view->texcache_region;
 
@@ -654,12 +673,7 @@ static void r300_merge_textures_and_samplers(struct r300_context* r300)
                     texstate->filter0 |= R300_TX_WRAP_T(R300_TX_CLAMP_TO_EDGE);
                 }
             } else {
-                /* determine min/max levels */
                 /* the MAX_MIP level is the largest (finest) one */
-                max_level = MIN3(sampler->max_lod + view->base.first_level,
-                                 tex->desc.b.b.last_level, view->base.last_level);
-                min_level = MIN2(sampler->min_lod + view->base.first_level,
-                                 max_level);
                 texstate->format.format0 |= R300_TX_NUM_LEVELS(max_level);
                 texstate->filter0 |= R300_TX_MAX_MIP_LEVEL(min_level);
             }
diff --git a/src/gallium/drivers/r300/r300_texture.c b/src/gallium/drivers/r300/r300_texture.c
index 852acdd462..66f6d80bd0 100644
--- a/src/gallium/drivers/r300/r300_texture.c
+++ b/src/gallium/drivers/r300/r300_texture.c
@@ -541,48 +541,55 @@ boolean r300_is_sampler_format_supported(enum pipe_format format)
     return r300_translate_texformat(format, 0, TRUE) != ~0;
 }
 
-static void r300_texture_setup_immutable_state(struct r300_screen* screen,
-                                               struct r300_texture* tex)
+void r300_texture_setup_format_state(struct r300_screen *screen,
+                                     struct r300_texture_desc *desc,
+                                     unsigned level,
+                                     struct r300_texture_format_state *out)
 {
-    struct r300_texture_format_state* f = &tex->tx_format;
-    struct pipe_resource *pt = &tex->desc.b.b;
+    struct pipe_resource *pt = &desc->b.b;
     boolean is_r500 = screen->caps.is_r500;
 
+    /* Mask out all the fields we change. */
+    out->format0 = 0;
+    out->format1 &= ~R300_TX_FORMAT_TEX_COORD_TYPE_MASK;
+    out->format2 &= R500_TXFORMAT_MSB;
+    out->tile_config = 0;
+
     /* Set sampler state. */
-    f->format0 = R300_TX_WIDTH((pt->width0 - 1) & 0x7ff) |
-                 R300_TX_HEIGHT((pt->height0 - 1) & 0x7ff);
+    out->format0 = R300_TX_WIDTH((u_minify(pt->width0, level) - 1) & 0x7ff) |
+                   R300_TX_HEIGHT((u_minify(pt->height0, level) - 1) & 0x7ff);
 
-    if (tex->desc.uses_stride_addressing) {
+    if (desc->uses_stride_addressing) {
         /* rectangles love this */
-        f->format0 |= R300_TX_PITCH_EN;
-        f->format2 = (tex->desc.stride_in_pixels[0] - 1) & 0x1fff;
+        out->format0 |= R300_TX_PITCH_EN;
+        out->format2 = (desc->stride_in_pixels[level] - 1) & 0x1fff;
     } else {
         /* Power of two textures (3D, mipmaps, and no pitch),
          * also NPOT textures with a width being POT. */
-        f->format0 |= R300_TX_DEPTH(util_logbase2(pt->depth0) & 0xf);
+        out->format0 |=
+            R300_TX_DEPTH(util_logbase2(u_minify(pt->depth0, level)) & 0xf);
     }
 
-    f->format1 = 0;
     if (pt->target == PIPE_TEXTURE_CUBE) {
-        f->format1 |= R300_TX_FORMAT_CUBIC_MAP;
+        out->format1 |= R300_TX_FORMAT_CUBIC_MAP;
     }
     if (pt->target == PIPE_TEXTURE_3D) {
-        f->format1 |= R300_TX_FORMAT_3D;
+        out->format1 |= R300_TX_FORMAT_3D;
     }
 
     /* large textures on r500 */
     if (is_r500)
     {
         if (pt->width0 > 2048) {
-            f->format2 |= R500_TXWIDTH_BIT11;
+            out->format2 |= R500_TXWIDTH_BIT11;
         }
         if (pt->height0 > 2048) {
-            f->format2 |= R500_TXHEIGHT_BIT11;
+            out->format2 |= R500_TXHEIGHT_BIT11;
         }
     }
 
-    f->tile_config = R300_TXO_MACRO_TILE(tex->desc.macrotile[0]) |
-                     R300_TXO_MICRO_TILE(tex->desc.microtile);
+    out->tile_config = R300_TXO_MACRO_TILE(desc->macrotile[level]) |
+                       R300_TXO_MICRO_TILE(desc->microtile);
 }
 
 static void r300_texture_setup_fb_state(struct r300_screen* screen,
@@ -716,7 +723,7 @@ r300_texture_create_object(struct r300_screen *rscreen,
         return NULL;
     }
     /* Initialize the hardware state. */
-    r300_texture_setup_immutable_state(rscreen, tex);
+    r300_texture_setup_format_state(rscreen, &tex->desc, 0, &tex->tx_format);
     r300_texture_setup_fb_state(rscreen, tex);
 
     tex->desc.b.vtbl = &r300_texture_vtbl;
diff --git a/src/gallium/drivers/r300/r300_texture.h b/src/gallium/drivers/r300/r300_texture.h
index 5a371a54a8..c4588a0c90 100644
--- a/src/gallium/drivers/r300/r300_texture.h
+++ b/src/gallium/drivers/r300/r300_texture.h
@@ -29,6 +29,8 @@
 struct pipe_screen;
 struct pipe_resource;
 struct winsys_handle;
+struct r300_texture_format_state;
+struct r300_texture_desc;
 struct r300_texture;
 struct r300_screen;
 
@@ -51,6 +53,10 @@ boolean r300_is_zs_format_supported(enum pipe_format format);
 
 boolean r300_is_sampler_format_supported(enum pipe_format format);
 
+void r300_texture_setup_format_state(struct r300_screen *screen,
+                                     struct r300_texture_desc *desc,
+                                     unsigned level,
+                                     struct r300_texture_format_state *out);
 
 struct pipe_resource*
 r300_texture_from_handle(struct pipe_screen* screen,