DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (dcc6d7a0dc00)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "mozilla/Assertions.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/LinkedList.h"
#include "nsWrapperCache.h"

#include "WebGLFramebufferAttachable.h"
#include "WebGLObjectModel.h"
#include "WebGLStrongTypes.h"

namespace mozilla {
class ErrorResult;
class WebGLContext;

namespace dom {
class Element;
class ImageData;
class ArrayBufferViewOrSharedArrayBufferView;
} // namespace dom

namespace webgl {
class TexUnpackBlob;
} // namespace webgl


bool
DoesTargetMatchDimensions(WebGLContext* webgl, TexImageTarget target, uint8_t dims,
                          const char* funcName);


// 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 WebGLContextBoundObject
{
    // 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.

    TexMinFilter mMinFilter;
    TexMagFilter mMagFilter;
    TexWrap mWrapS, mWrapT;

    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().

    GLenum mTexCompareMode;

    // Resolvable optimizations:
    bool mIsResolved;
    FakeBlackType mResolved_FakeBlack;
    const GLint* mResolved_Swizzle; // nullptr means 'default swizzle'.

public:
    class ImageInfo;

    // numLevels = log2(size) + 1
    // numLevels(16k) = log2(16k) + 1 = 14 + 1 = 15
    // numLevels(1M) = log2(1M) + 1 = 19.9 + 1 ~= 21
    // Or we can just max this out to 31, which is the number of unsigned bits in GLsizei.
    static const uint8_t kMaxLevelCount = 31;

    // And in turn, it needs these forwards:
protected:
    // We need to forward these.
    void SetImageInfo(ImageInfo* target, const ImageInfo& newInfo);
    void SetImageInfosAtLevel(uint32_t level, const ImageInfo& newInfo);

public:
    // We store information about the various images that are part of this
    // texture. (cubemap faces, mipmap levels)
    class ImageInfo
    {
        friend void WebGLTexture::SetImageInfo(ImageInfo* target,
                                               const ImageInfo& newInfo);
        friend void WebGLTexture::SetImageInfosAtLevel(uint32_t level,
                                                       const ImageInfo& newInfo);

    public:
        static const ImageInfo kUndefined;

        // This is the "effective internal format" of the texture, an official
        // OpenGL spec concept, see OpenGL ES 3.0.3 spec, section 3.8.3, page
        // 126 and below.
        const webgl::FormatUsageInfo* const mFormat;

        const uint32_t mWidth;
        const uint32_t mHeight;
        const uint32_t mDepth;

    protected:
        bool mIsDataInitialized;

        std::set<WebGLFBAttachPoint*> mAttachPoints;

    public:
        ImageInfo()
            : mFormat(LOCAL_GL_NONE)
            , mWidth(0)
            , mHeight(0)
            , mDepth(0)
            , mIsDataInitialized(false)
        { }

        ImageInfo(const webgl::FormatUsageInfo* format, uint32_t width, uint32_t height,
                  uint32_t depth, bool isDataInitialized)
            : mFormat(format)
            , mWidth(width)
            , mHeight(height)
            , mDepth(depth)
            , mIsDataInitialized(isDataInitialized)
        {
            MOZ_ASSERT(mFormat);
        }

        void Clear();

        ~ImageInfo() {
            if (!IsDefined())
                Clear();
        }

    protected:
        ImageInfo& operator =(const ImageInfo& a);

    public:
        uint32_t MaxMipmapLevels() const {
            // GLES 3.0.4, 3.8 - Mipmapping: `floor(log2(largest_of_dims)) + 1`
            uint32_t largest = std::max(std::max(mWidth, mHeight), mDepth);
            return FloorLog2Size(largest) + 1;
        }

        bool IsPowerOfTwo() const;

        void AddAttachPoint(WebGLFBAttachPoint* attachPoint);
        void RemoveAttachPoint(WebGLFBAttachPoint* attachPoint);
        void OnRespecify() const;

        size_t MemoryUsage() const;

        bool IsDefined() const {
            if (mFormat == LOCAL_GL_NONE) {
                MOZ_ASSERT(!mWidth && !mHeight && !mDepth);
                return false;
            }

            return true;
        }

        bool IsDataInitialized() const { return mIsDataInitialized; }

        void SetIsDataInitialized(bool isDataInitialized, WebGLTexture* tex);
    };

    ImageInfo mImageInfoArr[kMaxLevelCount * kMaxFaceCount];

    ////////////////////////////////////
public:
    NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLTexture)
    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLTexture)

    explicit WebGLTexture(WebGLContext* webgl, GLuint tex);

    void Delete();

    bool HasEverBeenBound() const { return mTarget != LOCAL_GL_NONE; }
    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(TexTarget texTarget);
    JS::Value GetTexParameter(TexTarget texTarget, GLenum pname);
    bool IsTexture() const;
    void TexParameter(TexTarget texTarget, GLenum pname, GLint* maybeIntParam,
                      GLfloat* maybeFloatParam);

    ////////////////////////////////////
    // WebGLTextureUpload.cpp

    void TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
                       GLint level, GLenum internalFormat, GLint xOffset, GLint yOffset,
                       GLint zOffset, GLsizei width, GLsizei height, GLsizei depth,
                       GLint border, GLenum unpackFormat, GLenum unpackType,
                       const dom::Nullable<dom::ArrayBufferView>& maybeView);

    void TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
                       GLint level, GLenum internalFormat, GLint xOffset, GLint yOffset,
                       GLint zOffset, GLenum unpackFormat, GLenum unpackType,
                       dom::ImageData* imageData);

    void TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
                       GLint level, GLenum internalFormat, GLint xOffset, GLint yOffset,
                       GLint zOffset, GLenum unpackFormat, GLenum unpackType,
                       dom::Element* elem, ErrorResult* const out_error);

protected:
    void TexOrSubImage(bool isSubImage, const char* funcName, TexImageTarget target,
                       GLint level, GLenum internalFormat, GLint xOffset, GLint yOffset,
                       GLint zOffset, GLint border, GLenum unpackFormat,
                       GLenum unpackType, webgl::TexUnpackBlob* blob);

    bool ValidateTexImageSpecification(const char* funcName, TexImageTarget target,
                                       GLint level, GLsizei width, GLsizei height,
                                       GLsizei depth, GLint border,
                                       WebGLTexture::ImageInfo** const out_imageInfo);
    bool ValidateTexImageSelection(const char* funcName, TexImageTarget target,
                                   GLint level, GLint xOffset, GLint yOffset,
                                   GLint zOffset, GLsizei width, GLsizei height,
                                   GLsizei depth,
                                   WebGLTexture::ImageInfo** const out_imageInfo);

public:
    void TexStorage(const char* funcName, TexTarget target, GLsizei levels,
                    GLenum sizedFormat, GLsizei width, GLsizei height, GLsizei depth);
protected:
    void TexImage(const char* funcName, TexImageTarget target, GLint level,
                  GLenum internalFormat, GLint border, GLenum unpackFormat,
                  GLenum unpackType, webgl::TexUnpackBlob* blob);
    void TexSubImage(const char* funcName, TexImageTarget target, GLint level,
                     GLint xOffset, GLint yOffset, GLint zOffset, GLenum unpackFormat,
                     GLenum unpackType, webgl::TexUnpackBlob* blob);
public:
    void CompressedTexImage(const char* funcName, TexImageTarget target, GLint level,
                            GLenum internalFormat, GLsizei width, GLsizei height,
                            GLsizei depth, GLint border,
                            const dom::ArrayBufferView& view);
    void CompressedTexSubImage(const char* funcName, TexImageTarget target, GLint level,
                               GLint xOffset, GLint yOffset, GLint zOffset, GLsizei width,
                               GLsizei height, GLsizei depth, GLenum sizedUnpackFormat,
                               const dom::ArrayBufferView& view);
    void CopyTexImage2D(TexImageTarget target, GLint level, GLenum internalFormat,
                        GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
    void CopyTexSubImage(const char* funcName, TexImageTarget target, GLint level,
                         GLint xOffset, GLint yOffset, GLint zOffset, GLint x, GLint y,
                         GLsizei width, GLsizei height);

    ////////////////////////////////////

protected:
    void ClampLevelBaseAndMax();

    void PopulateMipChain(uint32_t baseLevel, uint32_t maxLevel);

    uint32_t MaxEffectiveMipmapLevel() const;

    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;
        }
    }

    ImageInfo& 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 ImageInfo& ImageInfoAtFace(uint8_t face, uint32_t level) const {
        return const_cast<WebGLTexture*>(this)->ImageInfoAtFace(face, level);
    }

public:
    ImageInfo& ImageInfoAt(TexImageTarget texImageTarget, GLint level) {
        auto face = FaceForTarget(texImageTarget);
        return ImageInfoAtFace(face, level);
    }

    const ImageInfo& ImageInfoAt(TexImageTarget texImageTarget, GLint level) const {
        return const_cast<WebGLTexture*>(this)->ImageInfoAt(texImageTarget, level);
    }

    void SetImageInfoAt(TexImageTarget texImageTarget, GLint level,
                        const ImageInfo& val)
    {
        ImageInfo* target = &ImageInfoAt(texImageTarget, level);
        SetImageInfo(target, val);
    }

    const ImageInfo& BaseImageInfo() const {
        if (mBaseMipmapLevel >= kMaxLevelCount)
            return ImageInfo::kUndefined;

        return ImageInfoAtFace(0, mBaseMipmapLevel);
    }

    size_t MemoryUsage() const;

    bool InitializeImageData(const char* funcName, TexImageTarget target, uint32_t level);
protected:
    bool EnsureImageDataInitialized(const char* funcName, TexImageTarget target,
                                    uint32_t level);

    bool CheckFloatTextureFilterParams() const {
        // Without OES_texture_float_linear, only NEAREST and
        // NEAREST_MIMPAMP_NEAREST are supported.
        return mMagFilter == LOCAL_GL_NEAREST &&
               (mMinFilter == LOCAL_GL_NEAREST ||
                mMinFilter == LOCAL_GL_NEAREST_MIPMAP_NEAREST);
    }

    bool AreBothWrapModesClampToEdge() const {
        return mWrapS == LOCAL_GL_CLAMP_TO_EDGE &&
               mWrapT == LOCAL_GL_CLAMP_TO_EDGE;
    }

public:
    bool DoesMinFilterRequireMipmap() const {
        return !(mMinFilter == LOCAL_GL_NEAREST ||
                 mMinFilter == LOCAL_GL_LINEAR);
    }

    void SetGeneratedMipmap();

    void SetCustomMipmap();

    bool AreAllLevel0ImageInfosEqual() const;

    bool IsMipmapComplete() const;

    bool IsCubeComplete() const;

    bool IsComplete(const char** const out_reason) const;

    bool IsMipmapCubeComplete() const;

    bool IsCubeMap() const { return (mTarget == LOCAL_GL_TEXTURE_CUBE_MAP); }

    // Resolve cache optimizations
protected:
    bool GetFakeBlackType(const char* funcName, uint32_t texUnit,
                          FakeBlackType* const out_fakeBlack);
public:
    bool ResolveForDraw(const char* funcName, uint32_t texUnit,
                        FakeBlackType* const out_fakeBlack);

    void InvalidateResolveCache() { mIsResolved = false; }
};

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();
    }
}

already_AddRefed<mozilla::layers::Image>
ImageFromVideo(dom::HTMLVideoElement* elem);

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_