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|
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. */
#pragma once
/** \file
* \ingroup draw
*
* Wrapper classes that make it easier to use GPU objects in C++.
*
* All Buffers need to be sent to GPU memory before being used. This is done by using the
* `push_update()`.
*
* A Storage[Array]Buffer can hold much more data than a Uniform[Array]Buffer
* which can only holds 16KB of data.
*
* All types are not copyable and Buffers are not Movable.
*
* `drw::UniformArrayBuffer<T, len>`
* Uniform buffer object containing an array of T with len elements.
* Data can be accessed using the [] operator.
*
* `drw::UniformBuffer<T>`
* A uniform buffer object class inheriting from T.
* Data can be accessed just like a normal T object.
*
* `drw::StorageArrayBuffer<T, len>`
* Storage buffer object containing an array of T with len elements.
* The item count can be changed after creation using `resize()`.
* However, this requires the invalidation of the whole buffer and
* discarding all data inside it.
* Data can be accessed using the [] operator.
*
* `drw::StorageBuffer<T>`
* A storage buffer object class inheriting from T.
* Data can be accessed just like a normal T object.
*
* `drw::Texture`
* A simple wrapper to #GPUTexture. A #drw::Texture can be created without allocation.
* The `ensure_[1d|2d|3d|cube][_array]()` method is here to make sure the underlying texture
* will meet the requirements and create (or recreate) the #GPUTexture if needed.
*
* `drw::TextureFromPool`
* A GPUTexture from the viewport texture pool. This texture can be shared with other engines
* and its content is undefined when acquiring it.
* A #drw::TextureFromPool is acquired for rendering using `acquire()` and released once the
* rendering is done using `release()`. The same texture can be acquired & released multiple
* time in one draw loop.
* The `sync()` method *MUST* be called once during the cache populate (aka: Sync) phase.
*
* `drw::Framebuffer`
* Simple wrapper to #GPUFramebuffer that can be moved.
*
*/
#include "MEM_guardedalloc.h"
#include "draw_texture_pool.h"
#include "BLI_math_vec_types.hh"
#include "BLI_span.hh"
#include "BLI_utildefines.h"
#include "BLI_utility_mixins.hh"
#include "GPU_framebuffer.h"
#include "GPU_storage_buffer.h"
#include "GPU_texture.h"
#include "GPU_uniform_buffer.h"
namespace blender::draw {
/* -------------------------------------------------------------------- */
/** \name Implementation Details
* \{ */
namespace detail {
template<
/** Type of the values stored in this uniform buffer. */
typename T,
/** The number of values that can be stored in this uniform buffer. */
int64_t len,
/** True if the buffer only resides on GPU memory and cannot be accessed. */
bool device_only>
class DataBuffer {
protected:
T *data_ = nullptr;
int64_t len_ = len;
BLI_STATIC_ASSERT(((sizeof(T) * len) % 16) == 0,
"Buffer size need to be aligned to size of float4.");
public:
/**
* Get the value at the given index. This invokes undefined behavior when the
* index is out of bounds.
*/
const T &operator[](int64_t index) const
{
BLI_STATIC_ASSERT(!device_only, "");
BLI_assert(index >= 0);
BLI_assert(index < len);
return data_[index];
}
T &operator[](int64_t index)
{
BLI_STATIC_ASSERT(!device_only, "");
BLI_assert(index >= 0);
BLI_assert(index < len);
return data_[index];
}
/**
* Get a pointer to the beginning of the array.
*/
const T *data() const
{
BLI_STATIC_ASSERT(!device_only, "");
return data_;
}
T *data()
{
BLI_STATIC_ASSERT(!device_only, "");
return data_;
}
/**
* Iterator
*/
const T *begin() const
{
BLI_STATIC_ASSERT(!device_only, "");
return data_;
}
const T *end() const
{
BLI_STATIC_ASSERT(!device_only, "");
return data_ + len;
}
T *begin()
{
BLI_STATIC_ASSERT(!device_only, "");
return data_;
}
T *end()
{
BLI_STATIC_ASSERT(!device_only, "");
return data_ + len;
}
operator Span<T>() const
{
BLI_STATIC_ASSERT(!device_only, "");
return Span<T>(data_, len);
}
};
template<typename T, int64_t len, bool device_only>
class UniformCommon : public DataBuffer<T, len, false>, NonMovable, NonCopyable {
protected:
GPUUniformBuf *ubo_;
#ifdef DEBUG
const char *name_ = typeid(T).name();
#else
constexpr static const char *name_ = "UniformBuffer";
#endif
public:
UniformCommon()
{
ubo_ = GPU_uniformbuf_create_ex(sizeof(T) * len, nullptr, name_);
}
~UniformCommon()
{
GPU_uniformbuf_free(ubo_);
}
void push_update(void)
{
GPU_uniformbuf_update(ubo_, this->data_);
}
/* To be able to use it with DRW_shgroup_*_ref(). */
operator GPUUniformBuf *() const
{
return ubo_;
}
/* To be able to use it with DRW_shgroup_*_ref(). */
GPUUniformBuf **operator&()
{
return &ubo_;
}
};
template<typename T, int64_t len, bool device_only>
class StorageCommon : public DataBuffer<T, len, false>, NonMovable, NonCopyable {
protected:
GPUStorageBuf *ssbo_;
#ifdef DEBUG
const char *name_ = typeid(T).name();
#else
constexpr static const char *name_ = "StorageBuffer";
#endif
public:
StorageCommon()
{
init(len);
}
~StorageCommon()
{
GPU_storagebuf_free(ssbo_);
}
void resize(int64_t new_size)
{
BLI_assert(new_size > 0);
if (new_size != this->len_) {
GPU_storagebuf_free(ssbo_);
this->init(new_size);
}
}
void push_update(void)
{
BLI_assert(device_only == false);
GPU_storagebuf_update(ssbo_, this->data_);
}
operator GPUStorageBuf *() const
{
return ssbo_;
}
/* To be able to use it with DRW_shgroup_*_ref(). */
GPUStorageBuf **operator&()
{
return &ssbo_;
}
private:
void init(int64_t new_size)
{
this->len_ = new_size;
GPUUsageType usage = device_only ? GPU_USAGE_DEVICE_ONLY : GPU_USAGE_DYNAMIC;
ssbo_ = GPU_storagebuf_create_ex(sizeof(T) * this->len_, nullptr, usage, this->name_);
}
};
} // namespace detail
/** \} */
/* -------------------------------------------------------------------- */
/** \name Uniform Buffers
* \{ */
template<
/** Type of the values stored in this uniform buffer. */
typename T,
/** The number of values that can be stored in this uniform buffer. */
int64_t len
/** True if the buffer only resides on GPU memory and cannot be accessed. */
/* TODO(@fclem): Currently unsupported. */
/* bool device_only = false */>
class UniformArrayBuffer : public detail::UniformCommon<T, len, false> {
public:
UniformArrayBuffer()
{
/* TODO(@fclem): We should map memory instead. */
this->data_ = (T *)MEM_mallocN_aligned(len * sizeof(T), 16, this->name_);
}
~UniformArrayBuffer()
{
MEM_freeN(this->data_);
}
};
template<
/** Type of the values stored in this uniform buffer. */
typename T
/** True if the buffer only resides on GPU memory and cannot be accessed. */
/* TODO(@fclem): Currently unsupported. */
/* bool device_only = false */>
class UniformBuffer : public T, public detail::UniformCommon<T, 1, false> {
public:
UniformBuffer()
{
/* TODO(@fclem): How could we map this? */
this->data_ = static_cast<T *>(this);
}
UniformBuffer<T> &operator=(const T &other)
{
*static_cast<T *>(this) = other;
return *this;
}
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Storage Buffer
* \{ */
template<
/** Type of the values stored in this uniform buffer. */
typename T,
/** The number of values that can be stored in this uniform buffer. */
int64_t len,
/** True if created on device and no memory host memory is allocated. */
bool device_only = false>
class StorageArrayBuffer : public detail::StorageCommon<T, len, device_only> {
public:
StorageArrayBuffer()
{
/* TODO(@fclem): We should map memory instead. */
this->data_ = (T *)MEM_mallocN_aligned(len * sizeof(T), 16, this->name_);
}
~StorageArrayBuffer()
{
MEM_freeN(this->data_);
}
};
template<
/** Type of the values stored in this uniform buffer. */
typename T,
/** True if created on device and no memory host memory is allocated. */
bool device_only = false>
class StorageBuffer : public T, public detail::StorageCommon<T, 1, device_only> {
public:
StorageBuffer()
{
/* TODO(@fclem): How could we map this? */
this->data_ = static_cast<T *>(this);
}
StorageBuffer<T> &operator=(const T &other)
{
*static_cast<T *>(this) = other;
return *this;
}
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Texture
* \{ */
class Texture : NonCopyable {
protected:
GPUTexture *tx_ = nullptr;
Vector<GPUTexture *, 0> mip_views_;
Vector<GPUTexture *, 0> layer_views_;
const char *name_;
public:
Texture(const char *name = "gpu::Texture") : name_(name)
{
}
Texture(const char *name,
eGPUTextureFormat format,
int extent,
float *data = nullptr,
bool cubemap = false,
int mips = 1)
: name_(name)
{
tx_ = create(extent, 0, 0, mips, format, data, false, cubemap);
}
Texture(const char *name,
eGPUTextureFormat format,
int extent,
int layers,
float *data = nullptr,
bool cubemap = false,
int mips = 1)
: name_(name)
{
tx_ = create(extent, layers, 0, mips, format, data, true, cubemap);
}
Texture(
const char *name, eGPUTextureFormat format, int2 extent, float *data = nullptr, int mips = 1)
: name_(name)
{
tx_ = create(UNPACK2(extent), 0, mips, format, data, false, false);
}
Texture(const char *name,
eGPUTextureFormat format,
int2 extent,
int layers,
float *data = nullptr,
int mips = 1)
: name_(name)
{
tx_ = create(UNPACK2(extent), layers, mips, format, data, true, false);
}
Texture(
const char *name, eGPUTextureFormat format, int3 extent, float *data = nullptr, int mips = 1)
: name_(name)
{
tx_ = create(UNPACK3(extent), mips, format, data, false, false);
}
~Texture()
{
free();
}
/* To be able to use it with DRW_shgroup_uniform_texture(). */
operator GPUTexture *() const
{
BLI_assert(tx_ != nullptr);
return tx_;
}
/* To be able to use it with DRW_shgroup_uniform_texture_ref(). */
GPUTexture **operator&()
{
return &tx_;
}
Texture &operator=(Texture &&a)
{
if (*this != a) {
this->tx_ = a.tx_;
this->name_ = a.name_;
a.tx_ = nullptr;
}
return *this;
}
/**
* Ensure the texture has the correct properties. Recreating it if needed.
* Return true if a texture has been created.
*/
bool ensure_1d(eGPUTextureFormat format, int extent, float *data = nullptr, int mips = 1)
{
return ensure_impl(extent, 0, 0, mips, format, data, false, false);
}
/**
* Ensure the texture has the correct properties. Recreating it if needed.
* Return true if a texture has been created.
*/
bool ensure_1d_array(
eGPUTextureFormat format, int extent, int layers, float *data = nullptr, int mips = 1)
{
return ensure_impl(extent, layers, 0, mips, format, data, true, false);
}
/**
* Ensure the texture has the correct properties. Recreating it if needed.
* Return true if a texture has been created.
*/
bool ensure_2d(eGPUTextureFormat format, int2 extent, float *data = nullptr, int mips = 1)
{
return ensure_impl(UNPACK2(extent), 0, mips, format, data, false, false);
}
/**
* Ensure the texture has the correct properties. Recreating it if needed.
* Return true if a texture has been created.
*/
bool ensure_2d_array(
eGPUTextureFormat format, int2 extent, int layers, float *data = nullptr, int mips = 1)
{
return ensure_impl(UNPACK2(extent), layers, mips, format, data, true, false);
}
/**
* Ensure the texture has the correct properties. Recreating it if needed.
* Return true if a texture has been created.
*/
bool ensure_3d(eGPUTextureFormat format, int3 extent, float *data = nullptr, int mips = 1)
{
return ensure_impl(UNPACK3(extent), mips, format, data, false, false);
}
/**
* Ensure the texture has the correct properties. Recreating it if needed.
* Return true if a texture has been created.
*/
bool ensure_cube(eGPUTextureFormat format, int extent, float *data = nullptr, int mips = 1)
{
return ensure_impl(extent, extent, 0, mips, format, data, false, true);
}
/**
* Ensure the texture has the correct properties. Recreating it if needed.
* Return true if a texture has been created.
*/
bool ensure_cube_array(
eGPUTextureFormat format, int extent, int layers, float *data = nullptr, int mips = 1)
{
return ensure_impl(extent, extent, layers, mips, format, data, false, true);
}
/**
* Ensure the availability of mipmap views.
* Mip view covers all layers of array textures.
*/
bool ensure_mip_views()
{
int mip_len = GPU_texture_mip_count(tx_);
if (mip_views_.size() != mip_len) {
for (GPUTexture *&view : mip_views_) {
GPU_TEXTURE_FREE_SAFE(view);
}
eGPUTextureFormat format = GPU_texture_format(tx_);
for (auto i : IndexRange(mip_len)) {
mip_views_.append(GPU_texture_create_view(name_, tx_, format, i, 1, 0, 9999));
}
return true;
}
return false;
}
GPUTexture *mip_view(int miplvl)
{
return mip_views_[miplvl];
}
/**
* Ensure the availability of mipmap views.
* Layer views covers all layers of array textures.
*/
bool ensure_layer_views()
{
int layer_len = GPU_texture_layer_count(tx_);
if (layer_views_.size() != layer_len) {
for (GPUTexture *&view : layer_views_) {
GPU_TEXTURE_FREE_SAFE(view);
}
eGPUTextureFormat format = GPU_texture_format(tx_);
for (auto i : IndexRange(layer_len)) {
layer_views_.append(GPU_texture_create_view(name_, tx_, format, 0, 9999, i, 1));
}
return true;
}
return false;
}
GPUTexture *layer_view(int layer)
{
return layer_views_[layer];
}
/**
* Returns true if the texture has been allocated or acquired from the pool.
*/
bool is_valid(void) const
{
return tx_ != nullptr;
}
int width(void) const
{
return GPU_texture_width(tx_);
}
int height(void) const
{
return GPU_texture_height(tx_);
}
bool depth(void) const
{
return GPU_texture_depth(tx_);
}
bool is_stencil(void) const
{
return GPU_texture_stencil(tx_);
}
bool is_integer(void) const
{
return GPU_texture_integer(tx_);
}
bool is_cube(void) const
{
return GPU_texture_cube(tx_);
}
bool is_array(void) const
{
return GPU_texture_array(tx_);
}
int3 size(int miplvl = 0) const
{
int3 size(0);
GPU_texture_get_mipmap_size(tx_, miplvl, size);
return size;
}
/**
* Clear the entirety of the texture using one pixel worth of data.
*/
void clear(float4 values)
{
GPU_texture_clear(tx_, GPU_DATA_FLOAT, &values[0]);
}
/**
* Clear the entirety of the texture using one pixel worth of data.
*/
void clear(uint4 values)
{
GPU_texture_clear(tx_, GPU_DATA_UINT, &values[0]);
}
/**
* Clear the entirety of the texture using one pixel worth of data.
*/
void clear(int4 values)
{
GPU_texture_clear(tx_, GPU_DATA_INT, &values[0]);
}
/**
* Returns a buffer containing the texture data for the specified miplvl.
* The memory block needs to be manually freed by MEM_freeN().
*/
template<typename T> T *read(eGPUDataFormat format, int miplvl = 0)
{
return reinterpret_cast<T *>(GPU_texture_read(tx_, format, miplvl));
}
void filter_mode(bool do_filter)
{
GPU_texture_filter_mode(tx_, do_filter);
}
/**
* Free the internal texture but not the #drw::Texture itself.
*/
void free()
{
GPU_TEXTURE_FREE_SAFE(tx_);
for (GPUTexture *&view : mip_views_) {
GPU_TEXTURE_FREE_SAFE(view);
}
for (GPUTexture *&view : layer_views_) {
GPU_TEXTURE_FREE_SAFE(view);
}
mip_views_.clear();
}
/**
* Swap the content of the two textures.
*/
static void swap(Texture &a, Texture &b)
{
SWAP(GPUTexture *, a.tx_, b.tx_);
SWAP(const char *, a.name_, b.name_);
}
private:
bool ensure_impl(int w,
int h = 0,
int d = 0,
int mips = 1,
eGPUTextureFormat format = GPU_RGBA8,
float *data = nullptr,
bool layered = false,
bool cubemap = false)
{
/* TODO(@fclem): In the future, we need to check if mip_count did not change.
* For now it's ok as we always define all MIP level. */
if (tx_) {
int3 size = this->size();
if (size != int3(w, h, d) || GPU_texture_format(tx_) != format ||
GPU_texture_cube(tx_) != cubemap || GPU_texture_array(tx_) != layered) {
GPU_TEXTURE_FREE_SAFE(tx_);
}
}
if (tx_ == nullptr) {
tx_ = create(w, h, d, mips, format, data, layered, cubemap);
return true;
}
return false;
}
GPUTexture *create(int w,
int h,
int d,
int mips,
eGPUTextureFormat format,
float *data,
bool layered,
bool cubemap)
{
if (h == 0) {
return GPU_texture_create_1d(name_, w, mips, format, data);
}
else if (cubemap) {
if (layered) {
return GPU_texture_create_cube_array(name_, w, d, mips, format, data);
}
else {
return GPU_texture_create_cube(name_, w, mips, format, data);
}
}
else if (d == 0) {
if (layered) {
return GPU_texture_create_1d_array(name_, w, h, mips, format, data);
}
else {
return GPU_texture_create_2d(name_, w, h, mips, format, data);
}
}
else {
if (layered) {
return GPU_texture_create_2d_array(name_, w, h, d, mips, format, data);
}
else {
return GPU_texture_create_3d(name_, w, h, d, mips, format, GPU_DATA_FLOAT, data);
}
}
}
};
class TextureFromPool : public Texture, NonMovable {
private:
GPUTexture *tx_tmp_saved_ = nullptr;
public:
TextureFromPool(const char *name = "gpu::Texture") : Texture(name){};
/* Always use `release()` after rendering. */
void acquire(int2 extent, eGPUTextureFormat format, void *owner_)
{
if (this->tx_ == nullptr) {
if (tx_tmp_saved_ != nullptr) {
this->tx_ = tx_tmp_saved_;
return;
}
DrawEngineType *owner = (DrawEngineType *)owner_;
this->tx_ = DRW_texture_pool_query_2d(UNPACK2(extent), format, owner);
}
}
void release(void)
{
tx_tmp_saved_ = this->tx_;
this->tx_ = nullptr;
}
/**
* Clears any reference. Workaround for pool texture not being able to release on demand.
* Needs to be called at during the sync phase.
*/
void sync(void)
{
tx_tmp_saved_ = nullptr;
}
/** Remove methods that are forbidden with this type of textures. */
bool ensure_1d(int, int, eGPUTextureFormat, float *) = delete;
bool ensure_1d_array(int, int, int, eGPUTextureFormat, float *) = delete;
bool ensure_2d(int, int, int, eGPUTextureFormat, float *) = delete;
bool ensure_2d_array(int, int, int, int, eGPUTextureFormat, float *) = delete;
bool ensure_3d(int, int, int, int, eGPUTextureFormat, float *) = delete;
bool ensure_cube(int, int, eGPUTextureFormat, float *) = delete;
bool ensure_cube_array(int, int, int, eGPUTextureFormat, float *) = delete;
void filter_mode(bool) = delete;
void free() = delete;
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Framebuffer
* \{ */
class Framebuffer : NonCopyable {
private:
GPUFrameBuffer *fb_ = nullptr;
const char *name_;
public:
Framebuffer() : name_(""){};
Framebuffer(const char *name) : name_(name){};
~Framebuffer()
{
GPU_FRAMEBUFFER_FREE_SAFE(fb_);
}
void ensure(GPUAttachment depth = GPU_ATTACHMENT_NONE,
GPUAttachment color1 = GPU_ATTACHMENT_NONE,
GPUAttachment color2 = GPU_ATTACHMENT_NONE,
GPUAttachment color3 = GPU_ATTACHMENT_NONE,
GPUAttachment color4 = GPU_ATTACHMENT_NONE,
GPUAttachment color5 = GPU_ATTACHMENT_NONE,
GPUAttachment color6 = GPU_ATTACHMENT_NONE,
GPUAttachment color7 = GPU_ATTACHMENT_NONE,
GPUAttachment color8 = GPU_ATTACHMENT_NONE)
{
GPU_framebuffer_ensure_config(
&fb_, {depth, color1, color2, color3, color4, color5, color6, color7, color8});
}
Framebuffer &operator=(Framebuffer &&a)
{
if (*this != a) {
this->fb_ = a.fb_;
this->name_ = a.name_;
a.fb_ = nullptr;
}
return *this;
}
operator GPUFrameBuffer *() const
{
return fb_;
}
/**
* Swap the content of the two framebuffer.
*/
static void swap(Framebuffer &a, Framebuffer &b)
{
SWAP(GPUFrameBuffer *, a.fb_, b.fb_);
SWAP(const char *, a.name_, b.name_);
}
};
/** \} */
} // namespace blender::draw
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