1f6106566081978f663cf08e54bb8908cb58a5316Michal Krol/************************************************************************** 2f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * 3f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * Copyright 2010 VMware, Inc. 4f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * All Rights Reserved. 5f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * 6f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * Permission is hereby granted, free of charge, to any person obtaining a 7f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * copy of this software and associated documentation files (the 8f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * "Software"), to deal in the Software without restriction, including 9f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * without limitation the rights to use, copy, modify, merge, publish, 10f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * distribute, sub license, and/or sell copies of the Software, and to 11f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * permit persons to whom the Software is furnished to do so, subject to 12f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * the following conditions: 13f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * 14f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * The above copyright notice and this permission notice (including the 15f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * next paragraph) shall be included in all copies or substantial portions 16f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * of the Software. 17f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * 18f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * 26f6106566081978f663cf08e54bb8908cb58a5316Michal Krol **************************************************************************/ 27f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 28f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 29f6106566081978f663cf08e54bb8908cb58a5316Michal Krol#include "u_format.h" 30f6106566081978f663cf08e54bb8908cb58a5316Michal Krol#include "u_sampler.h" 31f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 32f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 332e87660ca6deba9ba866a8012cf82f41374b5adbBrian Paul/** 342e87660ca6deba9ba866a8012cf82f41374b5adbBrian Paul * Initialize a pipe_sampler_view. 'view' is considered to have 352e87660ca6deba9ba866a8012cf82f41374b5adbBrian Paul * uninitialized contents. 362e87660ca6deba9ba866a8012cf82f41374b5adbBrian Paul */ 37f6106566081978f663cf08e54bb8908cb58a5316Michal Krolstatic void 38f6106566081978f663cf08e54bb8908cb58a5316Michal Kroldefault_template(struct pipe_sampler_view *view, 39287c94ea4987033f9c99a2f91c5750c9083504caKeith Whitwell const struct pipe_resource *texture, 40f6106566081978f663cf08e54bb8908cb58a5316Michal Krol enum pipe_format format, 41f6106566081978f663cf08e54bb8908cb58a5316Michal Krol unsigned expand_green_blue) 42f6106566081978f663cf08e54bb8908cb58a5316Michal Krol{ 432e87660ca6deba9ba866a8012cf82f41374b5adbBrian Paul memset(view, 0, sizeof(*view)); 442e87660ca6deba9ba866a8012cf82f41374b5adbBrian Paul 45f6106566081978f663cf08e54bb8908cb58a5316Michal Krol /* XXX: Check if format is compatible with texture->format. 46f6106566081978f663cf08e54bb8908cb58a5316Michal Krol */ 47f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 48f6106566081978f663cf08e54bb8908cb58a5316Michal Krol view->format = format; 494c7001462607e6e99e474d6271dd481d3f8f201cRoland Scheidegger view->u.tex.first_level = 0; 504c7001462607e6e99e474d6271dd481d3f8f201cRoland Scheidegger view->u.tex.last_level = texture->last_level; 514c7001462607e6e99e474d6271dd481d3f8f201cRoland Scheidegger view->u.tex.first_layer = 0; 524c7001462607e6e99e474d6271dd481d3f8f201cRoland Scheidegger view->u.tex.last_layer = texture->target == PIPE_TEXTURE_3D ? 534c7001462607e6e99e474d6271dd481d3f8f201cRoland Scheidegger texture->depth0 - 1 : texture->array_size - 1; 54f6106566081978f663cf08e54bb8908cb58a5316Michal Krol view->swizzle_r = PIPE_SWIZZLE_RED; 55f6106566081978f663cf08e54bb8908cb58a5316Michal Krol view->swizzle_g = PIPE_SWIZZLE_GREEN; 56f6106566081978f663cf08e54bb8908cb58a5316Michal Krol view->swizzle_b = PIPE_SWIZZLE_BLUE; 57f6106566081978f663cf08e54bb8908cb58a5316Michal Krol view->swizzle_a = PIPE_SWIZZLE_ALPHA; 58f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 59013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul /* Override default green and blue component expansion to the requested 60013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * one. 61f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * 62013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * Gallium expands nonexistent components to (0,0,0,1), DX9 expands 63013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * to (1,1,1,1). Since alpha is always expanded to 1, and red is 64013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * always present, we only really care about green and blue 65013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * components. 66f6106566081978f663cf08e54bb8908cb58a5316Michal Krol * 67013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * To make it look less hackish, one would have to add 68013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * UTIL_FORMAT_SWIZZLE_EXPAND to indicate components for expansion 69013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * and then override without exceptions or favoring one component 70013dd29cca9b90555b7481a81ea1727fb7cea28bBrian Paul * over another. 71f6106566081978f663cf08e54bb8908cb58a5316Michal Krol */ 72f6106566081978f663cf08e54bb8908cb58a5316Michal Krol if (format != PIPE_FORMAT_A8_UNORM) { 73f6106566081978f663cf08e54bb8908cb58a5316Michal Krol const struct util_format_description *desc = util_format_description(format); 74f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 75f6106566081978f663cf08e54bb8908cb58a5316Michal Krol assert(desc); 76f6106566081978f663cf08e54bb8908cb58a5316Michal Krol if (desc) { 77f6106566081978f663cf08e54bb8908cb58a5316Michal Krol if (desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_0) { 78f6106566081978f663cf08e54bb8908cb58a5316Michal Krol view->swizzle_g = expand_green_blue; 79f6106566081978f663cf08e54bb8908cb58a5316Michal Krol } 80f6106566081978f663cf08e54bb8908cb58a5316Michal Krol if (desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_0) { 81f6106566081978f663cf08e54bb8908cb58a5316Michal Krol view->swizzle_b = expand_green_blue; 82f6106566081978f663cf08e54bb8908cb58a5316Michal Krol } 83f6106566081978f663cf08e54bb8908cb58a5316Michal Krol } 84f6106566081978f663cf08e54bb8908cb58a5316Michal Krol } 85f6106566081978f663cf08e54bb8908cb58a5316Michal Krol} 86f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 87f6106566081978f663cf08e54bb8908cb58a5316Michal Krolvoid 88f6106566081978f663cf08e54bb8908cb58a5316Michal Krolu_sampler_view_default_template(struct pipe_sampler_view *view, 89287c94ea4987033f9c99a2f91c5750c9083504caKeith Whitwell const struct pipe_resource *texture, 90f6106566081978f663cf08e54bb8908cb58a5316Michal Krol enum pipe_format format) 91f6106566081978f663cf08e54bb8908cb58a5316Michal Krol{ 92f6106566081978f663cf08e54bb8908cb58a5316Michal Krol /* Expand to (0, 0, 0, 1) */ 93f6106566081978f663cf08e54bb8908cb58a5316Michal Krol default_template(view, 94f6106566081978f663cf08e54bb8908cb58a5316Michal Krol texture, 95f6106566081978f663cf08e54bb8908cb58a5316Michal Krol format, 96f6106566081978f663cf08e54bb8908cb58a5316Michal Krol PIPE_SWIZZLE_ZERO); 97f6106566081978f663cf08e54bb8908cb58a5316Michal Krol} 98f6106566081978f663cf08e54bb8908cb58a5316Michal Krol 99f6106566081978f663cf08e54bb8908cb58a5316Michal Krolvoid 100f6106566081978f663cf08e54bb8908cb58a5316Michal Krolu_sampler_view_default_dx9_template(struct pipe_sampler_view *view, 101287c94ea4987033f9c99a2f91c5750c9083504caKeith Whitwell const struct pipe_resource *texture, 102f6106566081978f663cf08e54bb8908cb58a5316Michal Krol enum pipe_format format) 103f6106566081978f663cf08e54bb8908cb58a5316Michal Krol{ 104f6106566081978f663cf08e54bb8908cb58a5316Michal Krol /* Expand to (1, 1, 1, 1) */ 105f6106566081978f663cf08e54bb8908cb58a5316Michal Krol default_template(view, 106f6106566081978f663cf08e54bb8908cb58a5316Michal Krol texture, 107f6106566081978f663cf08e54bb8908cb58a5316Michal Krol format, 108f6106566081978f663cf08e54bb8908cb58a5316Michal Krol PIPE_SWIZZLE_ONE); 109f6106566081978f663cf08e54bb8908cb58a5316Michal Krol} 110