示例#1
0
bool
TexUnpackBytes::TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
                              WebGLTexture* tex, TexImageTarget target, GLint level,
                              const webgl::DriverUnpackInfo* dui, GLint xOffset,
                              GLint yOffset, GLint zOffset, const webgl::PackingInfo& pi,
                              GLenum* const out_error) const
{
    WebGLContext* webgl = tex->mContext;

    const auto format = FormatForPackingInfo(pi);
    const auto bytesPerPixel = webgl::BytesPerPixel(pi);

    const uint8_t* uploadPtr = mPtr;
    UniqueBuffer tempBuffer;

    do {
        if (!mIsClientData || !mPtr)
            break;

        if (!webgl->mPixelStore_FlipY &&
            !webgl->mPixelStore_PremultiplyAlpha)
        {
            break;
        }

        if (webgl->mPixelStore_UnpackImageHeight ||
            webgl->mPixelStore_UnpackSkipImages ||
            webgl->mPixelStore_UnpackRowLength ||
            webgl->mPixelStore_UnpackSkipRows ||
            webgl->mPixelStore_UnpackSkipPixels)
        {
            webgl->ErrorInvalidOperation("%s: Non-DOM-Element uploads with alpha-premult"
                                         " or y-flip do not support subrect selection.",
                                         funcName);
            return false;
        }

        webgl->GenerateWarning("%s: Alpha-premult and y-flip are deprecated for"
                               " non-DOM-Element uploads.",
                               funcName);

        const uint32_t rowLength = mWidth;
        const uint32_t rowCount = mHeight * mDepth;
        const auto stride = RoundUpToMultipleOf(rowLength * bytesPerPixel, mAlignment);
        if (!ConvertIfNeeded(webgl, funcName, rowLength, rowCount, format, mPtr, stride,
                             format, stride, &uploadPtr, &tempBuffer))
        {
            return false;
        }
    } while (false);

    //////

    const auto& gl = webgl->gl;

    bool useParanoidHandling = false;
    if (mNeedsExactUpload && webgl->mBoundPixelUnpackBuffer) {
        webgl->GenerateWarning("%s: Uploads from a buffer with a final row with a byte"
                               " count smaller than the row stride can incur extra"
                               " overhead.",
                               funcName);

        if (gl->WorkAroundDriverBugs()) {
            useParanoidHandling |= (gl->Vendor() == gl::GLVendor::NVIDIA);
        }
    }

    if (!useParanoidHandling) {
        if (webgl->mBoundPixelUnpackBuffer) {
            gl->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER,
                            webgl->mBoundPixelUnpackBuffer->mGLName);
        }

        *out_error = DoTexOrSubImage(isSubImage, gl, target, level, dui, xOffset, yOffset,
                                     zOffset, mWidth, mHeight, mDepth, uploadPtr);

        if (webgl->mBoundPixelUnpackBuffer) {
            gl->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
        }
        return true;
    }

    //////

    MOZ_ASSERT(webgl->mBoundPixelUnpackBuffer);

    if (!isSubImage) {
        // Alloc first to catch OOMs.
        AssertUintParamCorrect(gl, LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
        *out_error = DoTexOrSubImage(false, gl, target, level, dui, xOffset, yOffset,
                                     zOffset, mWidth, mHeight, mDepth, nullptr);
        if (*out_error)
            return true;
    }

    const ScopedLazyBind bindPBO(gl, LOCAL_GL_PIXEL_UNPACK_BUFFER,
                                 webgl->mBoundPixelUnpackBuffer);

    //////

    // Make our sometimes-implicit values explicit. Also this keeps them constant when we
    // ask for height=mHeight-1 and such.
    gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, mRowLength);
    gl->fPixelStorei(LOCAL_GL_UNPACK_IMAGE_HEIGHT, mImageHeight);

    if (mDepth > 1) {
        *out_error = DoTexOrSubImage(true, gl, target, level, dui, xOffset, yOffset,
                                     zOffset, mWidth, mHeight, mDepth-1, uploadPtr);
    }

    // Skip the images we uploaded.
    gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, mSkipImages + mDepth - 1);

    if (mHeight > 1) {
        *out_error = DoTexOrSubImage(true, gl, target, level, dui, xOffset, yOffset,
                                     zOffset+mDepth-1, mWidth, mHeight-1, 1, uploadPtr);
    }

    const auto totalSkipRows = CheckedUint32(mSkipImages) * mImageHeight + mSkipRows;
    const auto totalFullRows = CheckedUint32(mDepth - 1) * mImageHeight + mHeight - 1;
    const auto tailOffsetRows = totalSkipRows + totalFullRows;

    const auto bytesPerRow = CheckedUint32(mRowLength) * bytesPerPixel;
    const auto rowStride = RoundUpToMultipleOf(bytesPerRow, mAlignment);
    if (!rowStride.isValid()) {
        MOZ_CRASH("Should be checked earlier.");
    }
    const auto tailOffsetBytes = tailOffsetRows * rowStride;

    uploadPtr += tailOffsetBytes.value();

    //////

    gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 1);   // No stride padding.
    gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, 0);  // No padding in general.
    gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, 0); // Don't skip images,
    gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_ROWS, 0);   // or rows.
                                                      // Keep skipping pixels though!

    *out_error = DoTexOrSubImage(true, gl, target, level, dui, xOffset,
                                 yOffset+mHeight-1, zOffset+mDepth-1, mWidth, 1, 1,
                                 uploadPtr);

    // Reset all our modified state.
    gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, webgl->mPixelStore_UnpackAlignment);
    gl->fPixelStorei(LOCAL_GL_UNPACK_IMAGE_HEIGHT, webgl->mPixelStore_UnpackImageHeight);
    gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, webgl->mPixelStore_UnpackRowLength);
    gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES, webgl->mPixelStore_UnpackSkipImages);
    gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_ROWS, webgl->mPixelStore_UnpackSkipRows);

    return true;
}
示例#2
0
bool
TexUnpackSurface::TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
                                WebGLTexture* tex, TexImageTarget target, GLint level,
                                const webgl::DriverUnpackInfo* dui, GLint xOffset,
                                GLint yOffset, GLint zOffset, const webgl::PackingInfo& dstPI,
                                GLenum* const out_error) const
{
    const auto& webgl = tex->mContext;

    ////

    const auto rowLength = mSurf->GetSize().width;
    const auto rowCount = mSurf->GetSize().height;

    const auto& dstBPP = webgl::BytesPerPixel(dstPI);
    const auto dstFormat = FormatForPackingInfo(dstPI);

    ////

    WebGLTexelFormat srcFormat;
    uint8_t srcBPP;
    if (!GetFormatForSurf(mSurf, &srcFormat, &srcBPP)) {
        webgl->ErrorImplementationBug("%s: GetFormatForSurf failed for"
                                      " WebGLTexelFormat::%u.",
                                      funcName, uint32_t(mSurf->GetFormat()));
        return false;
    }

    gfx::DataSourceSurface::ScopedMap map(mSurf, gfx::DataSourceSurface::MapType::READ);
    if (!map.IsMapped()) {
        webgl->ErrorOutOfMemory("%s: Failed to map source surface for upload.", funcName);
        return false;
    }

    const auto& srcBegin = map.GetData();
    const auto& srcStride = map.GetStride();

    ////

    const auto srcRowLengthBytes = rowLength * srcBPP;

    const uint8_t maxGLAlignment = 8;
    uint8_t srcAlignment = 1;
    for (; srcAlignment <= maxGLAlignment; srcAlignment *= 2) {
        const auto strideGuess = RoundUpToMultipleOf(srcRowLengthBytes, srcAlignment);
        if (strideGuess == srcStride)
            break;
    }
    const uint32_t dstAlignment = (srcAlignment > maxGLAlignment) ? 1 : srcAlignment;

    const auto dstRowLengthBytes = rowLength * dstBPP;
    const auto dstStride = RoundUpToMultipleOf(dstRowLengthBytes, dstAlignment);

    ////

    const uint8_t* dstBegin = srcBegin;
    UniqueBuffer tempBuffer;
    if (!ConvertIfNeeded(webgl, funcName, rowLength, rowCount, srcFormat, srcBegin,
                         srcStride, dstFormat, dstStride, &dstBegin, &tempBuffer))
    {
        return false;
    }

    ////

    const auto& gl = webgl->gl;
    if (!gl->MakeCurrent()) {
        *out_error = LOCAL_GL_CONTEXT_LOST;
        return true;
    }

    gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, dstAlignment);
    if (webgl->IsWebGL2()) {
        gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, rowLength);
    }

    *out_error = DoTexOrSubImage(isSubImage, gl, target.get(), level, dui, xOffset,
                                 yOffset, zOffset, mWidth, mHeight, mDepth, dstBegin);

    gl->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, webgl->mPixelStore_UnpackAlignment);
    if (webgl->IsWebGL2()) {
        gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, webgl->mPixelStore_UnpackRowLength);
    }

    return true;
}
示例#3
0
bool
TexUnpackSurface::TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
                                WebGLTexture* tex, TexImageTarget target, GLint level,
                                const webgl::DriverUnpackInfo* dstDUI, GLint xOffset,
                                GLint yOffset, GLint zOffset,
                                GLenum* const out_error) const
{
    WebGLContext* webgl = tex->mContext;

    WebGLTexelFormat srcFormat;
    uint8_t srcBPP;
    if (!GetFormatForSurf(mSurf, &srcFormat, &srcBPP)) {
        webgl->ErrorImplementationBug("%s: GetFormatForSurf failed for"
                                      " WebGLTexelFormat::%u.",
                                      funcName, uint32_t(mSurf->GetFormat()));
        return false;
    }

    gfx::DataSourceSurface::ScopedMap map(mSurf, gfx::DataSourceSurface::MapType::READ);
    if (!map.IsMapped())
        return false;

    const auto srcBytes = map.GetData();
    const auto srcStride = map.GetStride();

    // CPU conversion. (++numCopies)

    webgl->GenerateWarning("%s: Incurred CPU-side conversion, which is very slow.",
                           funcName);

    const uint8_t* uploadBytes;
    UniqueBuffer tempBuffer;
    if (!ConvertIfNeeded(webgl, funcName, srcBytes, srcStride, srcBPP, srcFormat,
                         dstDUI, &uploadBytes, &tempBuffer))
    {
        return false;
    }

    //////

    gl::GLContext* const gl = webgl->gl;
    MOZ_ALWAYS_TRUE( gl->MakeCurrent() );

    const auto curEffectiveRowLength = FallbackOnZero(webgl->mPixelStore_UnpackRowLength,
                                                      mWidth);

    const bool changeRowLength = (mRowLength != curEffectiveRowLength);
    if (changeRowLength) {
        MOZ_ASSERT(webgl->IsWebGL2());
        gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, mRowLength);
    }

    *out_error = DoTexOrSubImage(isSubImage, gl, target.get(), level, dstDUI, xOffset,
                                 yOffset, zOffset, mWidth, mHeight, mDepth, uploadBytes);

    if (changeRowLength) {
        gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH, webgl->mPixelStore_UnpackRowLength);
    }

    return true;
}