r300g: added support for 3D textures

Mipmaps not tested. Also, I am not sure why piglit/texturing/tex3d needs
to have color tolerance +-1 to pass. The classic Mesa driver doesn't
need that.

1 files changed, 17 insertions, 42 deletions

diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index 1d9f91d0f73..f581f0ca091 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -119,32 +119,13 @@ static int r300_get_param(struct pipe_screen* pscreen, int param)
         case PIPE_CAP_TEXTURE_SHADOW_MAP:
             return 1;
         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
-            if (r300screen->caps->is_r500) {
-                /* 13 == 4096x4096 */
-                return 13;
-            } else {
-                /* 12 == 2048x2048 */
-                return 12;
-            }
         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
-            /* So, technically, the limit is the same as above, but some math
-             * shows why this is silly. Assuming RGBA, 4cpp, we can see that
-             * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
-             * practical. However, if at some point a game really wants this,
-             * then we can remove or raise this limit. */
-            if (r300screen->caps->is_r500) {
-                /* 9 == 256x256x256 */
-                return 9;
-            } else {
-                /* 8 == 128*128*128 */
-                return 8;
-            }
         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
             if (r300screen->caps->is_r500) {
-                /* 13 == 4096x4096 */
+                /* 13 == 4096 */
                 return 13;
             } else {
-                /* 12 == 2048x2048 */
+                /* 12 == 2048 */
                 return 12;
             }
         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
@@ -191,8 +172,8 @@ static float r300_get_paramf(struct pipe_screen* pscreen, int param)
     }
 }
 
-static boolean check_tex_2d_format(enum pipe_format format, uint32_t usage,
-                                   boolean is_r500)
+static boolean check_tex_format(enum pipe_format format, uint32_t usage,
+                                boolean is_r500)
 {
     uint32_t retval = 0;
 
@@ -286,7 +267,6 @@ static boolean check_tex_2d_format(enum pipe_format format, uint32_t usage,
     return (retval >= usage);
 }
 
-/* XXX moar targets */
 static boolean r300_is_format_supported(struct pipe_screen* pscreen,
                                         enum pipe_format format,
                                         enum pipe_texture_target target,
@@ -294,15 +274,17 @@ static boolean r300_is_format_supported(struct pipe_screen* pscreen,
                                         unsigned geom_flags)
 {
     switch (target) {
+        case PIPE_TEXTURE_1D:   /* handle 1D textures as 2D ones */
         case PIPE_TEXTURE_2D:
-            return check_tex_2d_format(format, tex_usage,
-                r300_screen(pscreen)->caps->is_r500);
-        case PIPE_TEXTURE_1D:
         case PIPE_TEXTURE_3D:
+            return check_tex_format(format, tex_usage,
+                r300_screen(pscreen)->caps->is_r500);
+
         case PIPE_TEXTURE_CUBE:
             debug_printf("r300: Implementation error: Unsupported format "
                     "target: %d\n", target);
             break;
+
         default:
             debug_printf("r300: Fatal: This is not a format target: %d\n",
                 target);
@@ -322,22 +304,9 @@ r300_get_tex_transfer(struct pipe_screen *screen,
 {
     struct r300_texture *tex = (struct r300_texture *)texture;
     struct r300_transfer *trans;
-    unsigned offset = 0;  /* in bytes */
+    unsigned offset;
 
-    /* XXX Add support for these things */
-    if (texture->target == PIPE_TEXTURE_CUBE) {
-        debug_printf("PIPE_TEXTURE_CUBE is not yet supported.\n");
-        /* offset = tex->image_offset[level][face]; */
-    }
-    else if (texture->target == PIPE_TEXTURE_3D) {
-        debug_printf("PIPE_TEXTURE_3D is not yet supported.\n");
-        /* offset = tex->image_offset[level][zslice]; */
-    }
-    else {
-        offset = tex->offset[level];
-        assert(face == 0);
-        assert(zslice == 0);
-    }
+    offset = r300_texture_get_offset(tex, level, zslice, face);  /* in bytes */
 
     trans = CALLOC_STRUCT(r300_transfer);
     if (trans) {
@@ -352,6 +321,12 @@ r300_get_tex_transfer(struct pipe_screen *screen,
         trans->transfer.nblocksy = texture->nblocksy[level];
         trans->transfer.stride = r300_texture_get_stride(tex, level);
         trans->transfer.usage = usage;
+
+        /* XXX not sure whether it's required to set these two,
+               the driver doesn't use them */
+        trans->transfer.zslice = zslice;
+        trans->transfer.face = face;
+
         trans->offset = offset;
     }
     return &trans->transfer;