mozilla
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gecko-dev
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gecko-dev/dom/canvas/WebGLTexture.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef WEBGL_TEXTURE_H_
#define WEBGL_TEXTURE_H_
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include "mozilla/Assertions.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/LinkedList.h"
#include "nsWrapperCache.h"
#include "CacheInvalidator.h"
#include "WebGLObjectModel.h"
#include "WebGLStrongTypes.h"
#include "WebGLTypes.h"
namespace mozilla {
class ErrorResult;
class WebGLContext;
class WebGLFramebuffer;
class WebGLSampler;
struct FloatOrInt;
struct TexImageSource;
namespace dom {
class Element;
class HTMLVideoElement;
class ImageData;
class ArrayBufferViewOrSharedArrayBufferView;
} // namespace dom
namespace layers {
class Image;
} // namespace layers
namespace webgl {
struct DriverUnpackInfo;
struct FormatUsageInfo;
struct PackingInfo;
class TexUnpackBlob;
} // namespace webgl
bool DoesTargetMatchDimensions(WebGLContext* webgl, TexImageTarget target,
uint8_t dims);
namespace webgl {
struct SamplingState final {
// Only store that which changes validation.
TexMinFilter minFilter = LOCAL_GL_NEAREST_MIPMAP_LINEAR;
TexMagFilter magFilter = LOCAL_GL_LINEAR;
TexWrap wrapS = LOCAL_GL_REPEAT;
TexWrap wrapT = LOCAL_GL_REPEAT;
// TexWrap wrapR = LOCAL_GL_REPEAT;
// GLfloat minLod = -1000;
// GLfloat maxLod = 1000;
TexCompareMode compareMode = LOCAL_GL_NONE;
// TexCompareFunc compareFunc = LOCAL_GL_LEQUAL;
};
struct ImageInfo final {
static const ImageInfo kUndefined;
const webgl::FormatUsageInfo* mFormat = nullptr;
uint32_t mWidth = 0;
uint32_t mHeight = 0;
uint32_t mDepth = 0;
mutable bool mHasData = false;
uint8_t mSamples = 0;
// -
size_t MemoryUsage() const;
bool IsDefined() const {
if (!mFormat) {
MOZ_ASSERT(!mWidth && !mHeight && !mDepth);
return false;
}
return true;
}
Maybe<ImageInfo> NextMip(GLenum target) const;
};
} // namespace webgl
// NOTE: When this class is switched to new DOM bindings, update the (then-slow)
// WrapObject calls in GetParameter and GetFramebufferAttachmentParameter.
class WebGLTexture final : public nsWrapperCache,
public WebGLRefCountedObject<WebGLTexture>,
public LinkedListElement<WebGLTexture>,
public CacheInvalidator {
// Friends
friend class WebGLContext;
friend class WebGLFramebuffer;
////////////////////////////////////
// Members
public:
const GLuint mGLName;
protected:
TexTarget mTarget;
static const uint8_t kMaxFaceCount = 6;
uint8_t mFaceCount; // 6 for cube maps, 1 otherwise.
bool mImmutable; // Set by texStorage*
uint8_t mImmutableLevelCount;
uint32_t mBaseMipmapLevel; // Set by texParameter (defaults to 0)
uint32_t mMaxMipmapLevel; // Set by texParameter (defaults to 1000)
// You almost certainly don't want to query mMaxMipmapLevel.
// You almost certainly want MaxEffectiveMipmapLevel().
webgl::SamplingState mSamplingState;
mutable const GLint* mCurSwizzle =
nullptr; // nullptr means 'default swizzle'.
// -
struct CompletenessInfo final {
uint8_t levels = 0;
bool powerOfTwo = false;
bool mipmapComplete = false;
const webgl::FormatUsageInfo* usage = nullptr;
const char* incompleteReason = nullptr;
};
mutable CacheWeakMap<const WebGLSampler*, webgl::SampleableInfo>
mSamplingCache;
public:
Maybe<const CompletenessInfo> CalcCompletenessInfo(
bool ensureInit, bool skipMips = false) const;
Maybe<const webgl::SampleableInfo> CalcSampleableInfo(
const WebGLSampler*) const;
const webgl::SampleableInfo* GetSampleableInfo(const WebGLSampler*) const;
// -
const auto& Immutable() const { return mImmutable; }
const auto& BaseMipmapLevel() const { return mBaseMipmapLevel; }
// We can just max this out to 31, which is the number of unsigned bits in
// GLsizei.
static const uint8_t kMaxLevelCount = 31;
// We store information about the various images that are part of this
// texture. (cubemap faces, mipmap levels)
webgl::ImageInfo mImageInfoArr[kMaxLevelCount * kMaxFaceCount];
////////////////////////////////////
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLTexture)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLTexture)
WebGLTexture(WebGLContext* webgl, GLuint tex);
void Delete();
TexTarget Target() const { return mTarget; }
WebGLContext* GetParentObject() const { return mContext; }
virtual JSObject* WrapObject(JSContext* cx,
JS::Handle<JSObject*> givenProto) override;
protected:
~WebGLTexture() { DeleteOnce(); }
public:
////////////////////////////////////
// GL calls
bool BindTexture(TexTarget texTarget);
void GenerateMipmap();
JS::Value GetTexParameter(TexTarget texTarget, GLenum pname);
void TexParameter(TexTarget texTarget, GLenum pname, const FloatOrInt& param);
////////////////////////////////////
// WebGLTextureUpload.cpp
protected:
void TexOrSubImageBlob(bool isSubImage, TexImageTarget target, GLint level,
GLenum internalFormat, GLint xOffset, GLint yOffset,
GLint zOffset, const webgl::PackingInfo& pi,
const webgl::TexUnpackBlob* blob);
bool ValidateTexImageSpecification(TexImageTarget target, GLint level,
uint32_t width, uint32_t height,
uint32_t depth,
webgl::ImageInfo** const out_imageInfo);
bool ValidateTexImageSelection(TexImageTarget target, GLint level,
GLint xOffset, GLint yOffset, GLint zOffset,
uint32_t width, uint32_t height,
uint32_t depth,
webgl::ImageInfo** const out_imageInfo);
bool ValidateCopyTexImageForFeedback(uint32_t level, GLint layer = 0) const;
bool ValidateUnpack(const webgl::TexUnpackBlob* blob, bool isFunc3D,
const webgl::PackingInfo& srcPI) const;
public:
void TexStorage(TexTarget target, GLsizei levels, GLenum sizedFormat,
GLsizei width, GLsizei height, GLsizei depth);
void TexImage(TexImageTarget target, GLint level, GLenum internalFormat,
GLsizei width, GLsizei height, GLsizei depth, GLint border,
const webgl::PackingInfo& pi, const TexImageSource& src);
void TexSubImage(TexImageTarget target, GLint level, GLint xOffset,
GLint yOffset, GLint zOffset, GLsizei width, GLsizei height,
GLsizei depth, const webgl::PackingInfo& pi,
const TexImageSource& src);
protected:
void TexImage(TexImageTarget target, GLint level, GLenum internalFormat,
const webgl::PackingInfo& pi, const webgl::TexUnpackBlob* blob);
void TexSubImage(TexImageTarget target, GLint level, GLint xOffset,
GLint yOffset, GLint zOffset, const webgl::PackingInfo& pi,
const webgl::TexUnpackBlob* blob);
public:
void CompressedTexImage(TexImageTarget target, GLint level,
GLenum internalFormat, GLsizei width, GLsizei height,
GLsizei depth, GLint border,
const TexImageSource& src,
const Maybe<GLsizei>& expectedImageSize);
void CompressedTexSubImage(TexImageTarget target, GLint level, GLint xOffset,
GLint yOffset, GLint zOffset, GLsizei width,
GLsizei height, GLsizei depth,
GLenum sizedUnpackFormat,
const TexImageSource& src,
const Maybe<GLsizei>& expectedImageSize);
void CopyTexImage2D(TexImageTarget target, GLint level, GLenum internalFormat,
GLint x, GLint y, GLsizei width, GLsizei height,
GLint border);
void CopyTexSubImage(TexImageTarget target, GLint level, GLint xOffset,
GLint yOffset, GLint zOffset, GLint x, GLint y,
GLsizei width, GLsizei height);
////////////////////////////////////
protected:
void ClampLevelBaseAndMax();
void RefreshSwizzle() const;
public:
uint32_t EffectiveMaxLevel() const; // GLES 3.0.5 p158: `q`
protected:
static uint8_t FaceForTarget(TexImageTarget texImageTarget) {
GLenum rawTexImageTarget = texImageTarget.get();
switch (rawTexImageTarget) {
case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X:
case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
case LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
case LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
return rawTexImageTarget - LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X;
default:
return 0;
}
}
auto& ImageInfoAtFace(uint8_t face, uint32_t level) {
MOZ_ASSERT(face < mFaceCount);
MOZ_ASSERT(level < kMaxLevelCount);
size_t pos = (level * mFaceCount) + face;
return mImageInfoArr[pos];
}
const auto& ImageInfoAtFace(uint8_t face, uint32_t level) const {
return const_cast<WebGLTexture*>(this)->ImageInfoAtFace(face, level);
}
public:
auto& ImageInfoAt(TexImageTarget texImageTarget, GLint level) {
const auto& face = FaceForTarget(texImageTarget);
return ImageInfoAtFace(face, level);
}
const auto& ImageInfoAt(TexImageTarget texImageTarget, GLint level) const {
return const_cast<WebGLTexture*>(this)->ImageInfoAt(texImageTarget, level);
}
const auto& BaseImageInfo() const {
if (mBaseMipmapLevel >= kMaxLevelCount) return webgl::ImageInfo::kUndefined;
return ImageInfoAtFace(0, mBaseMipmapLevel);
}
size_t MemoryUsage() const;
bool EnsureImageDataInitialized(TexImageTarget target, uint32_t level);
void PopulateMipChain(uint32_t maxLevel);
bool IsMipAndCubeComplete(uint32_t maxLevel, bool ensureInit,
bool* out_initFailed) const;
bool IsCubeMap() const { return (mTarget == LOCAL_GL_TEXTURE_CUBE_MAP); }
};
inline TexImageTarget TexImageTargetForTargetAndFace(TexTarget target,
uint8_t face) {
switch (target.get()) {
case LOCAL_GL_TEXTURE_2D:
case LOCAL_GL_TEXTURE_3D:
MOZ_ASSERT(face == 0);
return target.get();
case LOCAL_GL_TEXTURE_CUBE_MAP:
MOZ_ASSERT(face < 6);
return LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X + face;
default:
MOZ_CRASH("GFX: TexImageTargetForTargetAndFace");
}
}
already_AddRefed<mozilla::layers::Image> ImageFromVideo(
dom::HTMLVideoElement* elem);
bool IsTarget3D(TexImageTarget target);
GLenum DoTexImage(gl::GLContext* gl, TexImageTarget target, GLint level,
const webgl::DriverUnpackInfo* dui, GLsizei width,
GLsizei height, GLsizei depth, const void* data);
GLenum DoTexSubImage(gl::GLContext* gl, TexImageTarget target, GLint level,
GLint xOffset, GLint yOffset, GLint zOffset, GLsizei width,
GLsizei height, GLsizei depth,
const webgl::PackingInfo& pi, const void* data);
GLenum DoCompressedTexSubImage(gl::GLContext* gl, TexImageTarget target,
GLint level, GLint xOffset, GLint yOffset,
GLint zOffset, GLsizei width, GLsizei height,
GLsizei depth, GLenum sizedUnpackFormat,
GLsizei dataSize, const void* data);
} // namespace mozilla
#endif // WEBGL_TEXTURE_H_
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