diff options
| -rw-r--r-- | src/mesa/main/textureview.c | 61 | ||||
| -rw-r--r-- | src/mesa/main/textureview.h | 4 |
2 files changed, 65 insertions, 0 deletions
diff --git a/src/mesa/main/textureview.c b/src/mesa/main/textureview.c index 1094993a17a..5c08b1abfb4 100644 --- a/src/mesa/main/textureview.c +++ b/src/mesa/main/textureview.c @@ -346,6 +346,67 @@ compatible_format(struct gl_context *ctx, const struct gl_texture_object *origTe _mesa_lookup_enum_by_nr(origInternalFormat)); return false; } +/** + * Helper function for TexStorage and teximagemultisample to set immutable + * texture state needed by ARB_texture_view. + */ +void +_mesa_set_texture_view_state(struct gl_context *ctx, + struct gl_texture_object *texObj, + GLenum target, GLuint levels) +{ + struct gl_texture_image *texImage; + + /* Get a reference to what will become this View's base level */ + texImage = _mesa_select_tex_image(ctx, texObj, target, 0); + + /* When an immutable texture is created via glTexStorage or glTexImageMultisample, + * TEXTURE_IMMUTABLE_FORMAT becomes TRUE. + * TEXTURE_IMMUTABLE_LEVELS and TEXTURE_VIEW_NUM_LEVELS become levels. + * If the texture target is TEXTURE_1D_ARRAY then + * TEXTURE_VIEW_NUM_LAYERS becomes height. + * If the texture target is TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY, + * or TEXTURE_2D_MULTISAMPLE_ARRAY then TEXTURE_VIEW_NUM_LAYERS becomes depth. + * If the texture target is TEXTURE_CUBE_MAP, then + * TEXTURE_VIEW_NUM_LAYERS becomes 6. + * For any other texture target, TEXTURE_VIEW_NUM_LAYERS becomes 1. + * + * ARB_texture_multisample: Multisample textures do + * not have multiple image levels. + */ + + texObj->Immutable = GL_TRUE; + texObj->ImmutableLevels = levels; + texObj->MinLevel = 0; + texObj->NumLevels = levels; + texObj->MinLayer = 0; + texObj->NumLayers = 1; + switch (target) { + case GL_TEXTURE_1D_ARRAY: + texObj->NumLayers = texImage->Height; + break; + + case GL_TEXTURE_2D_MULTISAMPLE: + texObj->NumLevels = 1; + texObj->ImmutableLevels = 1; + break; + + case GL_TEXTURE_2D_MULTISAMPLE_ARRAY: + texObj->NumLevels = 1; + texObj->ImmutableLevels = 1; + /* fall through to set NumLayers */ + + case GL_TEXTURE_2D_ARRAY: + case GL_TEXTURE_CUBE_MAP_ARRAY: + texObj->NumLayers = texImage->Depth; + break; + + case GL_TEXTURE_CUBE_MAP: + texObj->NumLayers = 6; + break; + + } +} /** * glTextureView (ARB_texture_view) diff --git a/src/mesa/main/textureview.h b/src/mesa/main/textureview.h index c2f0f32be0a..3088ac19393 100644 --- a/src/mesa/main/textureview.h +++ b/src/mesa/main/textureview.h @@ -36,4 +36,8 @@ _mesa_TextureView(GLuint texture, GLenum target, GLuint origtexture, GLuint minlevel, GLuint numlevels, GLuint minlayer, GLuint numlayers); +extern void +_mesa_set_texture_view_state(struct gl_context *ctx, struct gl_texture_object *texObj, + GLenum target, GLuint levels); + #endif /* TEXTUREVIEW_H */ |