#include "config.h"

#include "gskvulkanimageprivate.h"

#include "gskvulkanbufferprivate.h"
#include "gskvulkanmemoryprivate.h"
#include "gskvulkanprivate.h"

#include "gdk/gdkmemoryformatprivate.h"

#include <string.h>

struct _GskVulkanImage
{
  GObject parent_instance;

  GdkVulkanContext *vulkan;

  GdkMemoryFormat format;
  VkFormat vk_format;
  gsize width;
  gsize height;
  VkImageTiling vk_tiling;
  VkImageUsageFlags vk_usage;
  VkImage vk_image;
  VkImageView vk_image_view;
  VkFramebuffer vk_framebuffer;
  GskVulkanImagePostprocess postprocess;

  VkPipelineStageFlags vk_pipeline_stage;
  VkImageLayout vk_image_layout;
  VkAccessFlags vk_access;

  GskVulkanMemory *memory;
};

G_DEFINE_TYPE (GskVulkanImage, gsk_vulkan_image, G_TYPE_OBJECT)

typedef struct _GskMemoryFormatInfo GskMemoryFormatInfo;

struct _GskMemoryFormatInfo
{
  VkFormat format;
  VkComponentMapping components;
  GskVulkanImagePostprocess postprocess;
};

static const GskMemoryFormatInfo *
gsk_memory_format_get_vk_format_infos (GdkMemoryFormat format)
{
#define SWIZZLE(a, b, c, d) { VK_COMPONENT_SWIZZLE_ ## a, VK_COMPONENT_SWIZZLE_ ## b, VK_COMPONENT_SWIZZLE_ ## c, VK_COMPONENT_SWIZZLE_ ## d }
#define DEFAULT_SWIZZLE SWIZZLE (R, G, B, A)
  switch (format)
    {
    case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_B8G8R8A8_UNORM, DEFAULT_SWIZZLE,     0 },
          { VK_FORMAT_R8G8B8A8_UNORM, SWIZZLE(B, G, R, A), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8B8A8_UNORM, SWIZZLE(G, B, A, R), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8B8A8_UNORM, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8B8A8_UNORM, SWIZZLE(A, B, G, R), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_B8G8R8A8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_B8G8R8A8_UNORM, DEFAULT_SWIZZLE,     GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_R8G8B8A8_UNORM, SWIZZLE(B, G, R, A), GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A8R8G8B8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8B8A8_UNORM, SWIZZLE(G, B, A, R), GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R8G8B8A8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8B8A8_UNORM, DEFAULT_SWIZZLE, GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A8B8G8R8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8B8A8_UNORM, SWIZZLE(A, B, G, R), GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_B8G8R8X8:
    case GDK_MEMORY_X8R8G8B8:
    case GDK_MEMORY_R8G8B8X8:
    case GDK_MEMORY_X8B8G8R8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R8G8B8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8B8_UNORM, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_B8G8R8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_B8G8R8_UNORM, DEFAULT_SWIZZLE,     0 },
          { VK_FORMAT_R8G8B8_UNORM, SWIZZLE(B, G, R, A), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R16G16B16:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16B16_UNORM, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16B16A16_UNORM, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R16G16B16A16:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16B16A16_UNORM, DEFAULT_SWIZZLE, GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R16G16B16_FLOAT:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16B16_SFLOAT, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16B16A16_SFLOAT, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R16G16B16A16_FLOAT:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16B16A16_SFLOAT, DEFAULT_SWIZZLE, GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R32G32B32_FLOAT:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R32G32B32_SFLOAT, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R32G32B32A32_SFLOAT, DEFAULT_SWIZZLE, 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_R32G32B32A32_FLOAT:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R32G32B32A32_SFLOAT, DEFAULT_SWIZZLE, GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_G8A8_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8_UNORM, SWIZZLE (R, R, R, G), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_G8A8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8G8_UNORM, SWIZZLE (R, R, R, G), GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_G8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8_UNORM, SWIZZLE (R, R, R, ONE), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_G16A16_PREMULTIPLIED:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16_UNORM, SWIZZLE (R, R, R, G), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_G16A16:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16G16_UNORM, SWIZZLE (R, R, R, G), GSK_VULKAN_IMAGE_PREMULTIPLY },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_G16:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16_UNORM, SWIZZLE (R, R, R, ONE), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A8:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R8_UNORM, SWIZZLE (R, R, R, R), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A16:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16_UNORM, SWIZZLE (R, R, R, R), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A16_FLOAT:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R16_SFLOAT, SWIZZLE (R, R, R, R), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_A32_FLOAT:
      {
        static const GskMemoryFormatInfo info[] = {
          { VK_FORMAT_R32_SFLOAT, SWIZZLE (R, R, R, R), 0 },
          { VK_FORMAT_UNDEFINED }
        };
        return info;
      }

    case GDK_MEMORY_N_FORMATS:
    default:
      g_assert_not_reached ();
      return NULL;
    }
#undef DEFAULT_SWIZZLE
#undef SWIZZLE
}

static GdkMemoryFormat
gsk_memory_format_get_fallback (GdkMemoryFormat format)
{
  switch (format)
    {
    case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
    case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
    case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
    case GDK_MEMORY_A8B8G8R8_PREMULTIPLIED:
    case GDK_MEMORY_B8G8R8A8:
    case GDK_MEMORY_A8R8G8B8:
    case GDK_MEMORY_R8G8B8A8:
    case GDK_MEMORY_A8B8G8R8:
    case GDK_MEMORY_R8G8B8:
      return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;

    case GDK_MEMORY_B8G8R8X8:
    case GDK_MEMORY_X8R8G8B8:
    case GDK_MEMORY_R8G8B8X8:
    case GDK_MEMORY_X8B8G8R8:
    case GDK_MEMORY_B8G8R8:
      return GDK_MEMORY_R8G8B8;

    case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
      return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;

    case GDK_MEMORY_R16G16B16:
    case GDK_MEMORY_R16G16B16A16:
      return GDK_MEMORY_R16G16B16A16_PREMULTIPLIED;

    case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
      return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;

    case GDK_MEMORY_R16G16B16_FLOAT:
    case GDK_MEMORY_R16G16B16A16_FLOAT:
      return GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED;

    case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
      return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;

    case GDK_MEMORY_R32G32B32_FLOAT:
    case  GDK_MEMORY_R32G32B32A32_FLOAT:
      return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;

    case GDK_MEMORY_G8A8_PREMULTIPLIED:
    case GDK_MEMORY_G8A8:
      return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;

    case GDK_MEMORY_G8:
      return GDK_MEMORY_R8G8B8;

    case GDK_MEMORY_G16A16_PREMULTIPLIED:
    case GDK_MEMORY_G16A16:
      return GDK_MEMORY_R16G16B16A16_PREMULTIPLIED;

    case GDK_MEMORY_G16:
      return GDK_MEMORY_R16G16B16;

    case GDK_MEMORY_A8:
      return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
    case GDK_MEMORY_A16:
      return GDK_MEMORY_R16G16B16A16_PREMULTIPLIED;
    case GDK_MEMORY_A16_FLOAT:
      return GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED;
    case GDK_MEMORY_A32_FLOAT:
      return GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED;

    case GDK_MEMORY_N_FORMATS:
    default:
      return GDK_MEMORY_R8G8B8A8_PREMULTIPLIED;
    }
}

static gboolean
gsk_vulkan_context_supports_format (GdkVulkanContext  *context,
                                    VkFormat           format,
                                    VkImageTiling      tiling,
                                    VkImageUsageFlags  usage,
                                    gsize              width,
                                    gsize              height)
{
  VkFormatProperties properties;
  VkImageFormatProperties image_properties;
  VkFormatFeatureFlags features, required;
  VkResult res;

  vkGetPhysicalDeviceFormatProperties (gdk_vulkan_context_get_physical_device (context),
                                       format,
                                       &properties);

  switch ((int) tiling)
    {
      case VK_IMAGE_TILING_OPTIMAL:
        features = properties.optimalTilingFeatures;
        break;
      case VK_IMAGE_TILING_LINEAR:
        features = properties.optimalTilingFeatures;
        break;
      default:
        return FALSE;
    }
  required = 0;
  if (usage & VK_IMAGE_USAGE_SAMPLED_BIT)
    required |= VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT;
  if (usage & VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT)
    required |= VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BLEND_BIT;

  if ((features & required) != required)
    return FALSE;

  res = vkGetPhysicalDeviceImageFormatProperties (gdk_vulkan_context_get_physical_device (context),
                                                  format,
                                                  VK_IMAGE_TYPE_2D,
                                                  tiling,
                                                  usage,
                                                  0,
                                                  &image_properties);
  if (res != VK_SUCCESS)
    return FALSE;

  if (image_properties.maxExtent.width < width ||
      image_properties.maxExtent.height < height)
    return FALSE;

  return TRUE;
}

static void
gsk_vulkan_image_create_view (GskVulkanImage            *self,
                              const GskMemoryFormatInfo *format)
{
  GSK_VK_CHECK (vkCreateImageView, gdk_vulkan_context_get_device (self->vulkan),
                                 &(VkImageViewCreateInfo) {
                                     .sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
                                     .image = self->vk_image,
                                     .viewType = VK_IMAGE_VIEW_TYPE_2D,
                                     .format = format->format,
                                     .components = format->components,
                                     .subresourceRange = {
                                         .aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
                                         .baseMipLevel = 0,
                                         .levelCount = 1,
                                         .baseArrayLayer = 0,
                                         .layerCount = 1,
                                     },
                                 },
                                 NULL,
                                 &self->vk_image_view);
}

static GskVulkanImage *
gsk_vulkan_image_new (GdkVulkanContext          *context,
                      GdkMemoryFormat            format,
                      gsize                      width,
                      gsize                      height,
                      GskVulkanImagePostprocess  allowed_postprocess,
                      VkImageTiling              tiling,
                      VkImageUsageFlags          usage,
                      VkPipelineStageFlags       stage,
                      VkImageLayout              layout,
                      VkAccessFlags              access,
                      VkMemoryPropertyFlags      memory)
{
  VkMemoryRequirements requirements;
  GskVulkanImage *self;
  const GskMemoryFormatInfo *vk_format;

  g_assert (width > 0 && height > 0);

  while (TRUE)
    {
      for (vk_format = gsk_memory_format_get_vk_format_infos (format);
           vk_format->format != VK_FORMAT_UNDEFINED;
           vk_format++)
        {
          if (vk_format->postprocess & ~allowed_postprocess)
            continue;

          if (gsk_vulkan_context_supports_format (context,
                                                  vk_format->format,
                                                  tiling, usage,
                                                  width, height))
            break;

          if (tiling != VK_IMAGE_TILING_OPTIMAL &&
              gsk_vulkan_context_supports_format (context,
                                                  vk_format->format,
                                                  VK_IMAGE_TILING_OPTIMAL, usage,
                                                  width, height))
            {
              tiling = VK_IMAGE_TILING_OPTIMAL;
              break;
            }
        }
      if (vk_format->format != VK_FORMAT_UNDEFINED)
        break;

      format = gsk_memory_format_get_fallback (format);
    }

  self = g_object_new (GSK_TYPE_VULKAN_IMAGE, NULL);

  self->vulkan = g_object_ref (context);
  self->format = format;
  self->vk_format = vk_format->format;
  self->postprocess = vk_format->postprocess;
  self->width = width;
  self->height = height;
  self->vk_tiling = tiling;
  self->vk_usage = usage;
  self->vk_pipeline_stage = stage;
  self->vk_image_layout = layout;
  self->vk_access = access;

  GSK_VK_CHECK (vkCreateImage, gdk_vulkan_context_get_device (context),
                                &(VkImageCreateInfo) {
                                    .sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
                                    .flags = 0,
                                    .imageType = VK_IMAGE_TYPE_2D,
                                    .format = vk_format->format,
                                    .extent = { width, height, 1 },
                                    .mipLevels = 1,
                                    .arrayLayers = 1,
                                    .samples = VK_SAMPLE_COUNT_1_BIT,
                                    .tiling = tiling,
                                    .usage = usage,
                                    .sharingMode = VK_SHARING_MODE_EXCLUSIVE,
                                    .initialLayout = self->vk_image_layout,
                                },
                                NULL,
                                &self->vk_image);

  vkGetImageMemoryRequirements (gdk_vulkan_context_get_device (context),
                                self->vk_image,
                                &requirements);

  self->memory = gsk_vulkan_memory_new (context,
                                        requirements.memoryTypeBits,
                                        memory,
                                        requirements.size);

  GSK_VK_CHECK (vkBindImageMemory, gdk_vulkan_context_get_device (context),
                                   self->vk_image,
                                   gsk_vulkan_memory_get_device_memory (self->memory),
                                   0);

  gsk_vulkan_image_create_view (self, vk_format);

  return self;
}

GskVulkanImage *
gsk_vulkan_image_new_for_upload (GdkVulkanContext  *context,
                                 GdkMemoryFormat    format,
                                 gsize              width,
                                 gsize              height)
{
  GskVulkanImage *self;

  self = gsk_vulkan_image_new (context,
                               format,
                               width,
                               height,
                               -1,
                               VK_IMAGE_TILING_LINEAR,
                               VK_IMAGE_USAGE_TRANSFER_DST_BIT |
                               VK_IMAGE_USAGE_SAMPLED_BIT,
                               VK_PIPELINE_STAGE_TRANSFER_BIT,
                               VK_IMAGE_LAYOUT_PREINITIALIZED,
                               VK_ACCESS_TRANSFER_WRITE_BIT,
                               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);

  return self;
}

static gboolean
gsk_vulkan_image_can_map (GskVulkanImage *self)
{
  if (GSK_DEBUG_CHECK (STAGING))
    return FALSE;

  if (self->vk_tiling != VK_IMAGE_TILING_LINEAR)
    return FALSE;

  if (self->vk_image_layout != VK_IMAGE_LAYOUT_PREINITIALIZED &&
      self->vk_image_layout != VK_IMAGE_LAYOUT_GENERAL)
    return FALSE;

  return gsk_vulkan_memory_can_map (self->memory, TRUE);
}

guchar *
gsk_vulkan_image_try_map (GskVulkanImage *self,
                          gsize          *out_stride)
{
  VkImageSubresource image_res;
  VkSubresourceLayout image_layout;
  guchar *result;

  if (!gsk_vulkan_image_can_map (self))
    return NULL;

  result = gsk_vulkan_memory_map (self->memory);
  if (result == NULL)
    return NULL;

  image_res.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
  image_res.mipLevel = 0;
  image_res.arrayLayer = 0;

  vkGetImageSubresourceLayout (gdk_vulkan_context_get_device (self->vulkan),
                               self->vk_image, &image_res, &image_layout);

  *out_stride = image_layout.rowPitch;

  return result + image_layout.offset;
}

void
gsk_vulkan_image_unmap (GskVulkanImage *self)
{
  gsk_vulkan_memory_unmap (self->memory);
}

GskVulkanImage *
gsk_vulkan_image_new_for_swapchain (GdkVulkanContext *context,
                                    VkImage           image,
                                    VkFormat          format,
                                    gsize             width,
                                    gsize             height)
{
  GskVulkanImage *self;

  self = g_object_new (GSK_TYPE_VULKAN_IMAGE, NULL);

  self->vulkan = g_object_ref (context);
  self->width = width;
  self->height = height;
  self->vk_tiling = VK_IMAGE_TILING_OPTIMAL;
  self->vk_image = image;
  self->vk_format = format;
  self->vk_pipeline_stage = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
  self->vk_image_layout = VK_IMAGE_LAYOUT_UNDEFINED;
  self->vk_access = 0;

  gsk_vulkan_image_create_view (self,
                                &(GskMemoryFormatInfo) {
                                  format,
                                  { VK_COMPONENT_SWIZZLE_R,
                                    VK_COMPONENT_SWIZZLE_G,
                                    VK_COMPONENT_SWIZZLE_B,
                                    VK_COMPONENT_SWIZZLE_A
                                   }
                                });

  return self;
}

GskVulkanImage *
gsk_vulkan_image_new_for_atlas (GdkVulkanContext *context,
                                gsize             width,
                                gsize             height)
{
  GskVulkanImage *self;

  self = gsk_vulkan_image_new (context,
                               GDK_MEMORY_DEFAULT,
                               width,
                               height,
                               0,
                               VK_IMAGE_TILING_OPTIMAL,
                               VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT,
                               VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT,
                               VK_IMAGE_LAYOUT_UNDEFINED,
                               0,
                               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);

  return self;
}

GskVulkanImage *
gsk_vulkan_image_new_for_offscreen (GdkVulkanContext *context,
                                    GdkMemoryFormat   preferred_format,
                                    gsize             width,
                                    gsize             height)
{
  GskVulkanImage *self;

  self = gsk_vulkan_image_new (context,
                               preferred_format,
                               width,
                               height,
                               0,
                               VK_IMAGE_TILING_LINEAR,
                               VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT |
                               VK_IMAGE_USAGE_SAMPLED_BIT |
                               VK_IMAGE_USAGE_TRANSFER_SRC_BIT,
                               VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
                               VK_IMAGE_LAYOUT_UNDEFINED,
                               VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
                               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);

  return self;
}

static void
gsk_vulkan_image_finalize (GObject *object)
{
  GskVulkanImage *self = GSK_VULKAN_IMAGE (object);
  VkDevice device;

  device = gdk_vulkan_context_get_device (self->vulkan);

  if (self->vk_framebuffer != VK_NULL_HANDLE)
    vkDestroyFramebuffer (device, self->vk_framebuffer, NULL);

  if (self->vk_image_view != VK_NULL_HANDLE)
    vkDestroyImageView (device, self->vk_image_view, NULL);

  /* memory is NULL for for_swapchain() images, where we don't own
   * the VkImage */
  if (self->memory)
    vkDestroyImage (device, self->vk_image, NULL);

  g_clear_pointer (&self->memory, gsk_vulkan_memory_free);

  g_object_unref (self->vulkan);

  G_OBJECT_CLASS (gsk_vulkan_image_parent_class)->finalize (object);
}

static void
gsk_vulkan_image_class_init (GskVulkanImageClass *klass)
{
  G_OBJECT_CLASS (klass)->finalize = gsk_vulkan_image_finalize;
}

static void
gsk_vulkan_image_init (GskVulkanImage *self)
{
}

VkFramebuffer
gsk_vulkan_image_get_framebuffer (GskVulkanImage *self,
                                  VkRenderPass    render_pass)
{
  if (self->vk_framebuffer)
    return self->vk_framebuffer;

  GSK_VK_CHECK (vkCreateFramebuffer, gdk_vulkan_context_get_device (self->vulkan),
                                     &(VkFramebufferCreateInfo) {
                                         .sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,
                                         .renderPass = render_pass,
                                         .attachmentCount = 1,
                                         .pAttachments = (VkImageView[1]) {
                                             self->vk_image_view,
                                         },
                                         .width = self->width,
                                         .height = self->height,
                                         .layers = 1
                                     },
                                     NULL,
                                     &self->vk_framebuffer);

  return self->vk_framebuffer;
}

gsize
gsk_vulkan_image_get_width (GskVulkanImage *self)
{
  return self->width;
}

gsize
gsk_vulkan_image_get_height (GskVulkanImage *self)
{
  return self->height;
}

GskVulkanImagePostprocess
gsk_vulkan_image_get_postprocess (GskVulkanImage *self)
{
  return self->postprocess;
}

VkImage
gsk_vulkan_image_get_vk_image (GskVulkanImage *self)
{
  return self->vk_image;
}

VkImageView
gsk_vulkan_image_get_image_view (GskVulkanImage *self)
{
  return self->vk_image_view;
}

VkPipelineStageFlags
gsk_vulkan_image_get_vk_pipeline_stage (GskVulkanImage *self)
{
  return self->vk_pipeline_stage;
}

VkImageLayout
gsk_vulkan_image_get_vk_image_layout (GskVulkanImage *self)
{
  return self->vk_image_layout;
}

VkAccessFlags
gsk_vulkan_image_get_vk_access (GskVulkanImage *self)
{
  return self->vk_access;
}

void
gsk_vulkan_image_set_vk_image_layout (GskVulkanImage       *self,
                                      VkPipelineStageFlags  stage,
                                      VkImageLayout         image_layout,
                                      VkAccessFlags         access)
{
  self->vk_pipeline_stage = stage;
  self->vk_image_layout = image_layout;
  self->vk_access = access;
}

void
gsk_vulkan_image_transition (GskVulkanImage       *self,
                             VkCommandBuffer       command_buffer,
                             VkPipelineStageFlags  stage,
                             VkImageLayout         image_layout,
                             VkAccessFlags         access)
{
  if (self->vk_pipeline_stage == stage &&
      self->vk_image_layout == image_layout &&
      self->vk_access == access)
    return;

  vkCmdPipelineBarrier (command_buffer,
                        self->vk_pipeline_stage,
                        stage,
                        0,
                        0, NULL,
                        0, NULL,
                        1, &(VkImageMemoryBarrier) {
                            .sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
                            .srcAccessMask = self->vk_access,
                            .dstAccessMask = access,
                            .oldLayout = self->vk_image_layout,
                            .newLayout = image_layout,
                            .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
                            .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
                            .image = self->vk_image,
                            .subresourceRange = {
                              .aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
                              .baseMipLevel = 0,
                              .levelCount = 1,
                              .baseArrayLayer = 0,
                              .layerCount = 1
                            },
                        });

  gsk_vulkan_image_set_vk_image_layout (self, stage, image_layout, access);
}

VkFormat
gsk_vulkan_image_get_vk_format (GskVulkanImage *self)
{
  return self->vk_format;
}

GdkMemoryFormat
gsk_vulkan_image_get_format (GskVulkanImage *self)
{
  return self->format;
}