Initial implementation of MESA_texture_array

Shadow sampling from texture arrays is still not implemented.  Everything
else should be there, though.

1 files changed, 143 insertions, 9 deletions

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 9fb430f39b4..8e528d9bbb8 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -629,6 +629,8 @@ _mesa_set_tex_image(struct gl_texture_object *tObj,
       case GL_TEXTURE_1D:
       case GL_TEXTURE_2D:
       case GL_TEXTURE_3D:
+      case GL_TEXTURE_1D_ARRAY_EXT:
+      case GL_TEXTURE_2D_ARRAY_EXT:
          tObj->Image[0][level] = texImage;
          break;
       case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
@@ -733,7 +735,9 @@ _mesa_is_proxy_texture(GLenum target)
            target == GL_PROXY_TEXTURE_2D ||
            target == GL_PROXY_TEXTURE_3D ||
            target == GL_PROXY_TEXTURE_CUBE_MAP_ARB ||
-           target == GL_PROXY_TEXTURE_RECTANGLE_NV);
+           target == GL_PROXY_TEXTURE_RECTANGLE_NV ||
+           target == GL_PROXY_TEXTURE_1D_ARRAY_EXT ||
+           target == GL_PROXY_TEXTURE_2D_ARRAY_EXT);
 }
 
 
@@ -783,6 +787,18 @@ _mesa_select_tex_object(GLcontext *ctx, const struct gl_texture_unit *texUnit,
       case GL_PROXY_TEXTURE_RECTANGLE_NV:
          return ctx->Extensions.NV_texture_rectangle
                 ? ctx->Texture.ProxyRect : NULL;
+      case GL_TEXTURE_1D_ARRAY_EXT:
+         return ctx->Extensions.MESA_texture_array
+                ? texUnit->Current1DArray : NULL;
+      case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
+         return ctx->Extensions.MESA_texture_array
+                ? ctx->Texture.Proxy1DArray : NULL;
+      case GL_TEXTURE_2D_ARRAY_EXT:
+         return ctx->Extensions.MESA_texture_array
+                ? texUnit->Current2DArray : NULL;
+      case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
+         return ctx->Extensions.MESA_texture_array
+                ? ctx->Texture.Proxy2DArray : NULL;
       default:
          _mesa_problem(NULL, "bad target in _mesa_select_tex_object()");
          return NULL;
@@ -848,6 +864,13 @@ _mesa_select_tex_image(GLcontext *ctx, const struct gl_texture_object *texObj,
          else 
             return NULL;
 
+      case GL_TEXTURE_1D_ARRAY_EXT:
+      case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
+      case GL_TEXTURE_2D_ARRAY_EXT:
+      case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
+         return (ctx->Extensions.MESA_texture_array)
+            ? texObj->Image[0][level] : NULL;
+
       default:
          return NULL;
    }
@@ -973,6 +996,36 @@ _mesa_get_proxy_tex_image(GLcontext *ctx, GLenum target, GLint level)
          texImage->TexObject = ctx->Texture.ProxyRect;
       }
       return texImage;
+   case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
+      if (level >= ctx->Const.MaxTextureLevels)
+         return NULL;
+      texImage = ctx->Texture.Proxy1DArray->Image[0][level];
+      if (!texImage) {
+         texImage = ctx->Driver.NewTextureImage(ctx);
+         if (!texImage) {
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
+            return NULL;
+         }
+         ctx->Texture.Proxy1DArray->Image[0][level] = texImage;
+         /* Set the 'back' pointer */
+         texImage->TexObject = ctx->Texture.Proxy1DArray;
+      }
+      return texImage;
+   case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
+      if (level >= ctx->Const.MaxTextureLevels)
+         return NULL;
+      texImage = ctx->Texture.Proxy2DArray->Image[0][level];
+      if (!texImage) {
+         texImage = ctx->Driver.NewTextureImage(ctx);
+         if (!texImage) {
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "proxy texture allocation");
+            return NULL;
+         }
+         ctx->Texture.Proxy2DArray->Image[0][level] = texImage;
+         /* Set the 'back' pointer */
+         texImage->TexObject = ctx->Texture.Proxy2DArray;
+      }
+      return texImage;
    default:
       return NULL;
    }
@@ -998,6 +1051,10 @@ _mesa_max_texture_levels(GLcontext *ctx, GLenum target)
    case GL_PROXY_TEXTURE_1D:
    case GL_TEXTURE_2D:
    case GL_PROXY_TEXTURE_2D:
+   case GL_TEXTURE_1D_ARRAY_EXT:
+   case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
+   case GL_TEXTURE_2D_ARRAY_EXT:
+   case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
       return ctx->Const.MaxTextureLevels;
    case GL_TEXTURE_3D:
    case GL_PROXY_TEXTURE_3D:
@@ -1292,6 +1349,36 @@ _mesa_test_proxy_teximage(GLcontext *ctx, GLenum target, GLint level,
          return GL_FALSE;
       }
       return GL_TRUE;
+   case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
+      maxSize = 1 << (ctx->Const.MaxTextureLevels - 1);
+      if (width < 2 * border || width > 2 + maxSize ||
+          (!ctx->Extensions.ARB_texture_non_power_of_two &&
+           _mesa_bitcount(width - 2 * border) != 1) ||
+          level >= ctx->Const.MaxTextureLevels) {
+         /* bad width or level */
+         return GL_FALSE;
+      }
+
+      if (height < 1 || height > ctx->Const.MaxArrayTextureLayers) {
+         return GL_FALSE;
+      }
+      return GL_TRUE;
+   case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
+      maxSize = 1 << (ctx->Const.MaxTextureLevels - 1);
+      if (width < 2 * border || width > 2 + maxSize ||
+          (!ctx->Extensions.ARB_texture_non_power_of_two &&
+           _mesa_bitcount(width - 2 * border) != 1) ||
+          height < 2 * border || height > 2 + maxSize ||
+          (!ctx->Extensions.ARB_texture_non_power_of_two &&
+           _mesa_bitcount(height - 2 * border) != 1) ||
+          level >= ctx->Const.MaxTextureLevels) {
+         /* bad width or height or level */
+         return GL_FALSE;
+      }
+      if (depth < 1 || depth > ctx->Const.MaxArrayTextureLayers) {
+         return GL_FALSE;
+      }
+      return GL_TRUE;
    default:
       _mesa_problem(ctx, "Invalid target in _mesa_test_proxy_teximage");
       return GL_FALSE;
@@ -1398,6 +1485,10 @@ texture_error_check( GLcontext *ctx, GLenum target,
          }
          proxy_target = GL_PROXY_TEXTURE_RECTANGLE_NV;
       }
+      else if (target == GL_PROXY_TEXTURE_1D_ARRAY_EXT ||
+               target == GL_TEXTURE_1D_ARRAY_EXT) {
+         proxy_target = GL_PROXY_TEXTURE_1D_ARRAY_EXT;
+      }
       else {
          _mesa_error(ctx, GL_INVALID_ENUM, "glTexImage2D(target)");
          return GL_TRUE;
@@ -1407,6 +1498,10 @@ texture_error_check( GLcontext *ctx, GLenum target,
       if (target == GL_PROXY_TEXTURE_3D || target == GL_TEXTURE_3D) {
          proxy_target = GL_PROXY_TEXTURE_3D;
       }
+      else if (target == GL_PROXY_TEXTURE_2D_ARRAY_EXT ||
+               target == GL_TEXTURE_2D_ARRAY_EXT) {
+         proxy_target = GL_PROXY_TEXTURE_2D_ARRAY_EXT;
+      }
       else {
          _mesa_error( ctx, GL_INVALID_ENUM, "glTexImage3D(target)" );
          return GL_TRUE;
@@ -1595,13 +1690,25 @@ subtexture_error_check( GLcontext *ctx, GLuint dimensions,
             return GL_TRUE;
          }
       }
+      else if (target == GL_TEXTURE_1D_ARRAY_EXT) {
+        if (!ctx->Extensions.MESA_texture_array) {
+           _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
+           return GL_TRUE;
+        }
+      }
       else if (target != GL_TEXTURE_2D) {
          _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
          return GL_TRUE;
       }
    }
    else if (dimensions == 3) {
-      if (target != GL_TEXTURE_3D) {
+      if (target == GL_TEXTURE_2D_ARRAY_EXT) {
+         if (!ctx->Extensions.MESA_texture_array) {
+            _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage3D(target)" );
+            return GL_TRUE;
+         }
+      }
+      else if (target != GL_TEXTURE_3D) {
          _mesa_error( ctx, GL_INVALID_ENUM, "glTexSubImage3D(target)" );
          return GL_TRUE;
       }
@@ -1855,6 +1962,17 @@ copytexture_error_check( GLcontext *ctx, GLuint dimensions,
                                                 format, type,
                                                 width, height, 1, border);
       }
+      else if (target == GL_TEXTURE_1D_ARRAY_EXT) {
+         if (!ctx->Extensions.MESA_texture_array) {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)");
+            return GL_TRUE;
+         }
+         sizeOK = ctx->Driver.TestProxyTexImage(ctx,
+                                                GL_PROXY_TEXTURE_1D_ARRAY_EXT,
+                                                level, internalFormat,
+                                                format, type,
+                                                width, height, 1, border);
+      }
       else {
          _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
          return GL_TRUE;
@@ -1968,15 +2086,23 @@ copytexsubimage_error_check( GLcontext *ctx, GLuint dimensions,
             return GL_TRUE;
          }
       }
+      else if (target == GL_TEXTURE_1D_ARRAY_EXT) {
+         if (!ctx->Extensions.MESA_texture_array) {
+            _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
+            return GL_TRUE;
+         }
+      }
       else if (target != GL_TEXTURE_2D) {
          _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
          return GL_TRUE;
       }
    }
    else if (dimensions == 3) {
-      if (target != GL_TEXTURE_3D) {
-         _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage3D(target)" );
-         return GL_TRUE;
+      if (((target != GL_TEXTURE_2D_ARRAY_EXT) ||
+	   (!ctx->Extensions.MESA_texture_array))
+	  && (target != GL_TEXTURE_3D)) {
+	 _mesa_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage3D(target)" );
+	 return GL_TRUE;
       }
    }
 
@@ -2393,7 +2519,9 @@ _mesa_TexImage2D( GLenum target, GLint level, GLint internalFormat,
         target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
         target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) ||
        (ctx->Extensions.NV_texture_rectangle &&
-        target == GL_TEXTURE_RECTANGLE_NV)) {
+        target == GL_TEXTURE_RECTANGLE_NV) ||
+       (ctx->Extensions.MESA_texture_array &&
+        target == GL_TEXTURE_1D_ARRAY_EXT)) {
       /* non-proxy target */
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
@@ -2451,7 +2579,9 @@ _mesa_TexImage2D( GLenum target, GLint level, GLint internalFormat,
             (target == GL_PROXY_TEXTURE_CUBE_MAP_ARB &&
              ctx->Extensions.ARB_texture_cube_map) ||
             (target == GL_PROXY_TEXTURE_RECTANGLE_NV &&
-             ctx->Extensions.NV_texture_rectangle)) {
+             ctx->Extensions.NV_texture_rectangle) ||
+            (ctx->Extensions.MESA_texture_array &&
+             target == GL_PROXY_TEXTURE_1D_ARRAY_EXT)) {
       /* Proxy texture: check for errors and update proxy state */
       struct gl_texture_image *texImage;
       texImage = _mesa_get_proxy_tex_image(ctx, target, level);
@@ -2491,7 +2621,9 @@ _mesa_TexImage3D( GLenum target, GLint level, GLint internalFormat,
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   if (target == GL_TEXTURE_3D) {
+   if (target == GL_TEXTURE_3D ||
+       (ctx->Extensions.MESA_texture_array &&
+        target == GL_TEXTURE_2D_ARRAY_EXT)) {
       /* non-proxy target */
       struct gl_texture_unit *texUnit;
       struct gl_texture_object *texObj;
@@ -2544,7 +2676,9 @@ _mesa_TexImage3D( GLenum target, GLint level, GLint internalFormat,
    out:
       _mesa_unlock_texture(ctx, texObj);
    }
-   else if (target == GL_PROXY_TEXTURE_3D) {
+   else if (target == GL_PROXY_TEXTURE_3D ||
+       (ctx->Extensions.MESA_texture_array &&
+        target == GL_PROXY_TEXTURE_2D_ARRAY_EXT)) {
       /* Proxy texture: check for errors and update proxy state */
       struct gl_texture_image *texImage;
       texImage = _mesa_get_proxy_tex_image(ctx, target, level);