/*
 * Copyright © 2021 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
#ifndef VK_IMAGE_H
#define VK_IMAGE_H

#include "vk_object.h"

#include "util/u_math.h"

#ifdef __cplusplus
extern "C" {
#endif

struct vk_image {
   struct vk_object_base base;

   VkImageCreateFlags create_flags;
   VkImageType image_type;

   /* format is from VkImageCreateInfo::format or
    * VkExternalFormatANDROID::externalFormat.  This works because only one of
    * them can be defined and the runtime uses VkFormat for external formats.
    */
   VkFormat format;

   VkExtent3D extent;
   uint32_t mip_levels;
   uint32_t array_layers;
   VkSampleCountFlagBits samples;
   VkImageTiling tiling;
   VkImageUsageFlags usage;

   /* Derived from format */
   VkImageAspectFlags aspects;

   /* VK_EXT_separate_stencil_usage */
   VkImageUsageFlags stencil_usage;

   /* VK_KHR_external_memory */
   VkExternalMemoryHandleTypeFlags external_handle_types;

   /* wsi_image_create_info::scanout */
   bool wsi_legacy_scanout;

#ifndef _WIN32
   /* VK_EXT_drm_format_modifier
    *
    * Initialized by vk_image_create/init() to DRM_FORMAT_MOD_INVALID.  It's
    * the job of the driver to parse the VK_EXT_drm_format_modifier extension
    * structs and choose the actual modifier.
    *
    * Must be DRM_FORMAT_MOD_INVALID unless tiling is
    * VK_IMAGE_TILING_DRM_FORMAT_MODIFIER_EXT.
    */
   uint64_t drm_format_mod;
#endif

#ifdef ANDROID
   /* AHARDWAREBUFFER_FORMAT for this image or 0
    *
    * A default is provided by the Vulkan runtime code based on the VkFormat
    * but it may be overridden by the driver as needed.
    */
   uint32_t ahb_format;
#endif
};
VK_DEFINE_NONDISP_HANDLE_CASTS(vk_image, base, VkImage,
                               VK_OBJECT_TYPE_IMAGE);

void vk_image_init(struct vk_device *device,
                   struct vk_image *image,
                   const VkImageCreateInfo *pCreateInfo);
void vk_image_finish(struct vk_image *image);

void *vk_image_create(struct vk_device *device,
                      const VkImageCreateInfo *pCreateInfo,
                      const VkAllocationCallbacks *alloc,
                      size_t size);
void vk_image_destroy(struct vk_device *device,
                      const VkAllocationCallbacks *alloc,
                      struct vk_image *image);

VkResult
vk_image_create_get_format_list(struct vk_device *device,
                                const VkImageCreateInfo *pCreateInfo,
                                const VkAllocationCallbacks *pAllocator,
                                VkFormat **formats,
                                uint32_t *format_count);

void vk_image_set_format(struct vk_image *image, VkFormat format);

VkImageUsageFlags vk_image_usage(const struct vk_image *image,
                                 VkImageAspectFlags aspect_mask);

VkImageAspectFlags vk_image_expand_aspect_mask(const struct vk_image *image,
                                               VkImageAspectFlags aspect_mask);

static inline VkExtent3D
vk_image_mip_level_extent(const struct vk_image *image,
                          uint32_t mip_level)
{
   const VkExtent3D extent = {
      u_minify(image->extent.width,  mip_level),
      u_minify(image->extent.height, mip_level),
      u_minify(image->extent.depth,  mip_level),
   };
   return extent;
}

/* This is defined as a macro so that it works for both
 * VkImageSubresourceRange and VkImageSubresourceLayers
 */
#define vk_image_subresource_layer_count(_image, _range) \
   ((_range)->layerCount == VK_REMAINING_ARRAY_LAYERS ? \
    (_image)->array_layers - (_range)->baseArrayLayer : (_range)->layerCount)

static inline uint32_t
vk_image_subresource_level_count(const struct vk_image *image,
                                 const VkImageSubresourceRange *range)
{
   return range->levelCount == VK_REMAINING_MIP_LEVELS ?
          image->mip_levels - range->baseMipLevel : range->levelCount;
}

static inline VkExtent3D
vk_image_sanitize_extent(const struct vk_image *image,
                         const VkExtent3D imageExtent)
{
   switch (image->image_type) {
   case VK_IMAGE_TYPE_1D:
      return (VkExtent3D) { imageExtent.width, 1, 1 };
   case VK_IMAGE_TYPE_2D:
      return (VkExtent3D) { imageExtent.width, imageExtent.height, 1 };
   case VK_IMAGE_TYPE_3D:
      return imageExtent;
   default:
      unreachable("invalid image type");
   }
}

VkExtent3D
vk_image_extent_to_elements(const struct vk_image *image, VkExtent3D extent);

static inline VkOffset3D
vk_image_sanitize_offset(const struct vk_image *image,
                         const VkOffset3D imageOffset)
{
   switch (image->image_type) {
   case VK_IMAGE_TYPE_1D:
      return (VkOffset3D) { imageOffset.x, 0, 0 };
   case VK_IMAGE_TYPE_2D:
      return (VkOffset3D) { imageOffset.x, imageOffset.y, 0 };
   case VK_IMAGE_TYPE_3D:
      return imageOffset;
   default:
      unreachable("invalid image type");
   }
}

VkOffset3D
vk_image_offset_to_elements(const struct vk_image *image, VkOffset3D offset);

struct vk_image_buffer_layout {
   /**
    * VkBufferImageCopy2::bufferRowLength or
    * VkBufferImageCopy2::extent::width as needed.
    */
   uint32_t row_length;

   /**
    * VkBufferImageCopy2::bufferImageHeight or
    * VkBufferImageCopy2::extent::height as needed.
    */
   uint32_t image_height;

   /** Size of a single element (pixel or compressed block) in bytes */
   uint32_t element_size_B;

   /** Row stride in bytes */
   uint32_t row_stride_B;

   /** Image (or layer) stride in bytes
    *
    * For 1D or 2D array images, this is the stride in bytes between array
    * slices.  For 3D images, this is the stride in bytes between fixed-Z
    * slices.
    */
   uint64_t image_stride_B;
};

struct vk_image_buffer_layout
vk_image_buffer_copy_layout(const struct vk_image *image,
                            const VkBufferImageCopy2* region);

struct vk_image_view {
   struct vk_object_base base;

   VkImageViewCreateFlags create_flags;
   struct vk_image *image;
   VkImageViewType view_type;

   /** VkImageViewCreateInfo::format or vk_image::format */
   VkFormat format;

   /** Image view format, relative to the selected aspects
    *
    * For a depth/stencil image:
    *
    *  - If vk_image_view::aspects contains both depth and stencil, this will
    *    be the full depth/stencil format of the image.
    *
    *  - If only one aspect is selected, this will be the depth-only or
    *    stencil-only format, as per the selected aspect.
    *
    * For color images, we have three cases:
    *
    *  1. It's a single-plane image in which case this is the unmodified
    *     format provided to VkImageViewCreateInfo::format or
    *     vk_image::format.
    *
    *  2. It's a YCbCr view of a multi-plane image in which case the
    *     client will have asked for VK_IMAGE_ASPECT_COLOR_BIT and the
    *     format provided will be the full planar format.  In this case,
    *     the format will be the full format containing all the planes.
    *
    *  3. It's a single-plane view of a multi-plane image in which case
    *     the client will have asked for VK_IMAGE_ASPECT_PLANE_N_BIT and
    *     will have provided a format compatible with that specific
    *     plane of the multi-planar format.  In this case, the format will be
    *     the plane-compatible format requested by the client.
    */
   VkFormat view_format;

   /* Component mapping, aka swizzle
    *
    * Unlike the swizzle provided via VkImageViewCreateInfo::components, this
    * will never contain VK_COMPONENT_SWIZZLE_IDENTITY.  It will be resolved
    * to VK_COMPONENT_SWIZZLE_R/G/B/A, as appropriate.
    */
   VkComponentMapping swizzle;

   /** Aspects from the image represented by this view
    *
    * For depth/stencil images, this is the aspectMask provided by
    * VkImageViewCreateinfo::subresourceRange::aspectMask.
    *
    * For color images, we have three cases:
    *
    *  1. It's a single-plane image in which case this only aspect is
    *     VK_IMAGE_ASPECT_COLOR_BIT.
    *
    *  2. It's a YCbCr view of a multi-plane image in which case the
    *     client will have asked for VK_IMAGE_ASPECT_COLOR_BIT and the
    *     format provided will be the full planar format.  In this case,
    *     aspects will be the full set of plane aspects in the image.
    *
    *  3. It's a single-plane view of a multi-plane image in which case
    *     the client will have asked for VK_IMAGE_ASPECT_PLANE_N_BIT and
    *     will have provided a format compatible with that specific
    *     plane of the multi-planar format.  In this case, aspects will be
    *     VK_IMAGE_ASPECT_PLANE_N_BIT where N is the selected plane.
    *
    * This seems almost backwards from the API but ensures that
    * vk_image_view::aspects is always a subset of vk_image::aspects.
    */
   VkImageAspectFlags aspects;

   uint32_t base_mip_level;
   uint32_t level_count;
   uint32_t base_array_layer;
   uint32_t layer_count;

   /* VK_EXT_sliced_view_of_3d */
   struct {
      /* VkImageViewSlicedCreateInfoEXT::sliceOffset
       *
       * This field will be 0 for 1D and 2D images, 2D views of 3D images, or
       * when no VkImageViewSlicedCreateInfoEXT is provided.
       */
      uint32_t z_slice_offset;

      /* VkImageViewSlicedCreateInfoEXT::sliceCount
       *
       * This field will be 1 for 1D and 2D images or 2D views of 3D images.
       * For 3D views, it will be VkImageViewSlicedCreateInfoEXT::sliceCount
       * or image view depth (see vk_image_view::extent) when no
       * VkImageViewSlicedCreateInfoEXT is provided.
       */
      uint32_t z_slice_count;
   } storage;

   /* VK_EXT_image_view_min_lod */
   float min_lod;

   /* Image extent at LOD 0 */
   VkExtent3D extent;

   /* VK_KHR_maintenance2 */
   VkImageUsageFlags usage;
};
VK_DEFINE_NONDISP_HANDLE_CASTS(vk_image_view, base, VkImageView,
                               VK_OBJECT_TYPE_IMAGE_VIEW);

void vk_image_view_init(struct vk_device *device,
                        struct vk_image_view *image_view,
                        bool driver_internal,
                        const VkImageViewCreateInfo *pCreateInfo);
void vk_image_view_finish(struct vk_image_view *image_view);

void *vk_image_view_create(struct vk_device *device,
                           bool driver_internal,
                           const VkImageViewCreateInfo *pCreateInfo,
                           const VkAllocationCallbacks *alloc,
                           size_t size);
void vk_image_view_destroy(struct vk_device *device,
                           const VkAllocationCallbacks *alloc,
                           struct vk_image_view *image_view);

static inline VkImageSubresourceRange
vk_image_view_subresource_range(const struct vk_image_view *view)
{
   VkImageSubresourceRange range = {
      .aspectMask = view->aspects,
      .baseMipLevel = view->base_mip_level,
      .levelCount = view->level_count,
      .baseArrayLayer = view->base_array_layer,
      .layerCount = view->layer_count,
   };

   return range;
}

bool vk_image_layout_is_read_only(VkImageLayout layout,
                                  VkImageAspectFlagBits aspect);
bool vk_image_layout_is_depth_only(VkImageLayout layout);

VkImageUsageFlags vk_image_layout_to_usage_flags(VkImageLayout layout,
                                                 VkImageAspectFlagBits aspect);

VkImageLayout vk_att_ref_stencil_layout(const VkAttachmentReference2 *att_ref,
                                        const VkAttachmentDescription2 *attachments);
VkImageLayout vk_att_desc_stencil_layout(const VkAttachmentDescription2 *att_desc,
                                           bool final);

#ifdef __cplusplus
}
#endif

#endif /* VK_IMAGE_H */
