summaryrefslogtreecommitdiff
path: root/dom/canvas/WebGLTexture.h
blob: 66e781f237ae06ee8b079bcc99d8851b727d3cba (plain)
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
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
/* -*- 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 <set>
#include <vector>

#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"
#include "WebGLTypes.h"

namespace mozilla {
class ErrorResult;
class WebGLContext;
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,
                          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>
{
    // 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 PossibleMipmapLevels() const {
            // GLES 3.0.4, 3.8 - Mipmapping: `floor(log2(largest_of_dims)) + 1`
            const uint32_t largest = std::max(std::max(mWidth, mHeight), mDepth);
            MOZ_ASSERT(largest != 0);
            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)

    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, const FloatOrInt& param);

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

protected:
    void TexOrSubImageBlob(bool isSubImage, const char* funcName, TexImageTarget target,
                           GLint level, GLenum internalFormat, GLint xOffset,
                           GLint yOffset, GLint zOffset,
                           const webgl::PackingInfo& pi,
                           const webgl::TexUnpackBlob* blob);

    bool ValidateTexImageSpecification(const char* funcName, TexImageTarget target,
                                       GLint level, uint32_t width, uint32_t height,
                                       uint32_t depth,
                                       WebGLTexture::ImageInfo** const out_imageInfo);
    bool ValidateTexImageSelection(const char* funcName, TexImageTarget target,
                                   GLint level, GLint xOffset, GLint yOffset,
                                   GLint zOffset, uint32_t width, uint32_t height,
                                   uint32_t depth,
                                   WebGLTexture::ImageInfo** const out_imageInfo);
    bool ValidateCopyTexImageForFeedback(const char* funcName, uint32_t level, GLint layer = 0) const;

    bool ValidateUnpack(const char* funcName, const webgl::TexUnpackBlob* blob,
                        bool isFunc3D, const webgl::PackingInfo& srcPI) const;
public:
    void TexStorage(const char* funcName, TexTarget target, GLsizei levels,
                    GLenum sizedFormat, GLsizei width, GLsizei height, GLsizei depth);
    void TexImage(const char* funcName, TexImageTarget target, GLint level,
                  GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth,
                  GLint border, const webgl::PackingInfo& pi, const TexImageSource& src);
    void TexSubImage(const char* funcName, 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(const char* funcName, TexImageTarget target, GLint level,
                  GLenum internalFormat, const webgl::PackingInfo& pi,
                  const webgl::TexUnpackBlob* blob);
    void TexSubImage(const char* funcName, TexImageTarget target, GLint level,
                     GLint xOffset, GLint yOffset, GLint zOffset,
                     const webgl::PackingInfo& pi, const webgl::TexUnpackBlob* blob);
public:
    void CompressedTexImage(const char* funcName, TexImageTarget target, GLint level,
                            GLenum internalFormat, GLsizei width, GLsizei height,
                            GLsizei depth, GLint border, const TexImageSource& src);
    void CompressedTexSubImage(const char* funcName, TexImageTarget target, GLint level,
                               GLint xOffset, GLint yOffset, GLint zOffset, GLsizei width,
                               GLsizei height, GLsizei depth, GLenum sizedUnpackFormat,
                               const TexImageSource& src);

    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);

    bool MaxEffectiveMipmapLevel(uint32_t texUnit, uint32_t* const out) 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 EnsureLevelInitialized(const char* funcName, 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 char* funcName, uint32_t texUnit,
                          bool* const out_initFailed);

    bool IsCubeComplete() const;

    bool IsComplete(const char* funcName, uint32_t texUnit, const char** const out_reason,
                    bool* const out_initFailed);

    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 IsFeedback(WebGLContext* webgl, const char* funcName, uint32_t texUnit,
                    const std::vector<const WebGLFBAttachPoint*>& fbAttachments) const;

    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("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_