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;
}
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;
}
bool
TexUnpackBlob::ConvertIfNeeded(WebGLContext* webgl, const char* funcName,
const uint8_t* srcBytes, uint32_t srcStride,
uint8_t srcBPP, WebGLTexelFormat srcFormat,
const webgl::DriverUnpackInfo* dstDUI,
const uint8_t** const out_bytes,
UniqueBuffer* const out_anchoredBuffer) const
{
*out_bytes = srcBytes;
if (!HasData() || !mWidth || !mHeight || !mDepth)
return true;
//////
const auto totalSkipRows = mSkipRows + CheckedUint32(mSkipImages) * mImageHeight;
const auto offset = mSkipPixels * CheckedUint32(srcBPP) + totalSkipRows * srcStride;
if (!offset.isValid()) {
webgl->ErrorOutOfMemory("%s: Invalid offset calculation during conversion.",
funcName);
return false;
}
const uint32_t skipBytes = offset.value();
auto const srcBegin = srcBytes + skipBytes;
//////
const auto srcOrigin = (webgl->mPixelStore_FlipY ? gl::OriginPos::TopLeft
: gl::OriginPos::BottomLeft);
const auto dstOrigin = gl::OriginPos::BottomLeft;
const bool isDstPremult = webgl->mPixelStore_PremultiplyAlpha;
const auto pi = dstDUI->ToPacking();
const auto dstBPP = webgl::BytesPerPixel(pi);
const auto dstWidthBytes = CheckedUint32(dstBPP) * mWidth;
const auto dstRowLengthBytes = CheckedUint32(dstBPP) * mRowLength;
const auto dstAlignment = mAlignment;
const auto dstStride = RoundUpToMultipleOf(dstRowLengthBytes, dstAlignment);
//////
const auto dstTotalRows = CheckedUint32(mDepth - 1) * mImageHeight + mHeight;
const auto dstUsedSizeExceptLastRow = (dstTotalRows - 1) * dstStride;
const auto dstSize = skipBytes + dstUsedSizeExceptLastRow + dstWidthBytes;
if (!dstSize.isValid()) {
webgl->ErrorOutOfMemory("%s: Invalid dstSize calculation during conversion.",
funcName);
return false;
}
//////
const auto dstFormat = FormatForPackingInfo(pi);
bool premultMatches = (mIsSrcPremult == isDstPremult);
if (!UnpackFormatHasColorAndAlpha(dstDUI->unpackFormat)) {
premultMatches = true;
}
const bool needsPixelConversion = (srcFormat != dstFormat || !premultMatches);
const bool originsMatch = (srcOrigin == dstOrigin);
MOZ_ASSERT_IF(!needsPixelConversion, srcBPP == dstBPP);
if (!needsPixelConversion &&
originsMatch &&
srcStride == dstStride.value())
{
// No conversion needed!
return true;
}
//////
// We need some sort of conversion, so create the dest buffer.
*out_anchoredBuffer = calloc(1, dstSize.value());
const auto dstBytes = (uint8_t*)out_anchoredBuffer->get();
if (!dstBytes) {
webgl->ErrorOutOfMemory("%s: Unable to allocate buffer during conversion.",
funcName);
return false;
}
*out_bytes = dstBytes;
const auto dstBegin = dstBytes + skipBytes;
//////
// Row conversion
if (!needsPixelConversion) {
webgl->GenerateWarning("%s: Incurred CPU row conversion, which is slow.",
funcName);
const uint8_t* srcRow = srcBegin;
uint8_t* dstRow = dstBegin;
const auto widthBytes = dstWidthBytes.value();
ptrdiff_t dstCopyStride = dstStride.value();
if (!originsMatch) {
dstRow += dstUsedSizeExceptLastRow.value();
dstCopyStride = -dstCopyStride;
}
for (uint32_t i = 0; i < dstTotalRows.value(); i++) {
memcpy(dstRow, srcRow, widthBytes);
srcRow += srcStride;
dstRow += dstCopyStride;
}
return true;
}
////////////
// Pixel conversion.
MOZ_ASSERT(srcFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
MOZ_ASSERT(dstFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
webgl->GenerateWarning("%s: Incurred CPU pixel conversion, which is very slow.",
funcName);
//////
// And go!:
bool wasTrivial;
if (!ConvertImage(mWidth, dstTotalRows.value(),
srcBegin, srcStride, srcOrigin, srcFormat, mIsSrcPremult,
dstBegin, dstStride.value(), dstOrigin, dstFormat, isDstPremult,
&wasTrivial))
{
webgl->ErrorImplementationBug("%s: ConvertImage failed.", funcName);
return false;
}
if (!wasTrivial) {
webgl->GenerateWarning("%s: Chosen format/type incurred an expensive reformat:"
" 0x%04x/0x%04x",
funcName, dstDUI->unpackFormat, dstDUI->unpackType);
}
return true;
}
