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gecko-dev/dom/canvas/TexUnpackBlob.cpp

900 строки
28 KiB
C++
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/* -*- Mode: C++; tab-width: 20; 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/. */
#include "TexUnpackBlob.h"
#include "GLBlitHelper.h"
#include "GLContext.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLCanvasElement.h"
#include "mozilla/RefPtr.h"
#include "nsLayoutUtils.h"
#include "WebGLBuffer.h"
#include "WebGLContext.h"
#include "WebGLFormats.h"
#include "WebGLTexelConversions.h"
#include "WebGLTexture.h"
namespace mozilla {
namespace webgl {
static bool IsPIValidForDOM(const webgl::PackingInfo& pi) {
// https://www.khronos.org/registry/webgl/specs/latest/2.0/#TEXTURE_TYPES_FORMATS_FROM_DOM_ELEMENTS_TABLE
// Just check for invalid individual formats and types, not combinations.
switch (pi.format) {
case LOCAL_GL_RGB:
case LOCAL_GL_RGBA:
case LOCAL_GL_LUMINANCE_ALPHA:
case LOCAL_GL_LUMINANCE:
case LOCAL_GL_ALPHA:
case LOCAL_GL_RED:
case LOCAL_GL_RED_INTEGER:
case LOCAL_GL_RG:
case LOCAL_GL_RG_INTEGER:
case LOCAL_GL_RGB_INTEGER:
case LOCAL_GL_RGBA_INTEGER:
break;
case LOCAL_GL_SRGB:
case LOCAL_GL_SRGB_ALPHA:
// Allowed in WebGL1+EXT_srgb
break;
default:
return false;
}
switch (pi.type) {
case LOCAL_GL_UNSIGNED_BYTE:
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
case LOCAL_GL_HALF_FLOAT:
case LOCAL_GL_HALF_FLOAT_OES:
case LOCAL_GL_FLOAT:
case LOCAL_GL_UNSIGNED_INT_10F_11F_11F_REV:
break;
default:
return false;
}
return true;
}
static bool ValidatePIForDOM(WebGLContext* webgl,
const webgl::PackingInfo& pi) {
if (!IsPIValidForDOM(pi)) {
webgl->ErrorInvalidValue("Format or type is invalid for DOM sources.");
return false;
}
return true;
}
static WebGLTexelFormat FormatForPackingInfo(const PackingInfo& pi) {
switch (pi.type) {
case LOCAL_GL_UNSIGNED_BYTE:
switch (pi.format) {
case LOCAL_GL_RED:
case LOCAL_GL_LUMINANCE:
case LOCAL_GL_RED_INTEGER:
return WebGLTexelFormat::R8;
case LOCAL_GL_ALPHA:
return WebGLTexelFormat::A8;
case LOCAL_GL_LUMINANCE_ALPHA:
return WebGLTexelFormat::RA8;
case LOCAL_GL_RGB:
case LOCAL_GL_RGB_INTEGER:
case LOCAL_GL_SRGB:
return WebGLTexelFormat::RGB8;
case LOCAL_GL_RGBA:
case LOCAL_GL_RGBA_INTEGER:
case LOCAL_GL_SRGB_ALPHA:
return WebGLTexelFormat::RGBA8;
case LOCAL_GL_RG:
case LOCAL_GL_RG_INTEGER:
return WebGLTexelFormat::RG8;
default:
break;
}
break;
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
if (pi.format == LOCAL_GL_RGB) return WebGLTexelFormat::RGB565;
break;
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
if (pi.format == LOCAL_GL_RGBA) return WebGLTexelFormat::RGBA5551;
break;
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
if (pi.format == LOCAL_GL_RGBA) return WebGLTexelFormat::RGBA4444;
break;
case LOCAL_GL_HALF_FLOAT:
case LOCAL_GL_HALF_FLOAT_OES:
switch (pi.format) {
case LOCAL_GL_RED:
case LOCAL_GL_LUMINANCE:
return WebGLTexelFormat::R16F;
case LOCAL_GL_ALPHA:
return WebGLTexelFormat::A16F;
case LOCAL_GL_LUMINANCE_ALPHA:
return WebGLTexelFormat::RA16F;
case LOCAL_GL_RG:
return WebGLTexelFormat::RG16F;
case LOCAL_GL_RGB:
return WebGLTexelFormat::RGB16F;
case LOCAL_GL_RGBA:
return WebGLTexelFormat::RGBA16F;
default:
break;
}
break;
case LOCAL_GL_FLOAT:
switch (pi.format) {
case LOCAL_GL_RED:
case LOCAL_GL_LUMINANCE:
return WebGLTexelFormat::R32F;
case LOCAL_GL_ALPHA:
return WebGLTexelFormat::A32F;
case LOCAL_GL_LUMINANCE_ALPHA:
return WebGLTexelFormat::RA32F;
case LOCAL_GL_RG:
return WebGLTexelFormat::RG32F;
case LOCAL_GL_RGB:
return WebGLTexelFormat::RGB32F;
case LOCAL_GL_RGBA:
return WebGLTexelFormat::RGBA32F;
default:
break;
}
break;
case LOCAL_GL_UNSIGNED_INT_10F_11F_11F_REV:
if (pi.format == LOCAL_GL_RGB) return WebGLTexelFormat::RGB11F11F10F;
break;
default:
break;
}
return WebGLTexelFormat::FormatNotSupportingAnyConversion;
}
////////////////////
static bool ValidateUnpackPixels(WebGLContext* webgl, uint32_t fullRows,
uint32_t tailPixels,
webgl::TexUnpackBlob* blob) {
if (!blob->mWidth || !blob->mHeight || !blob->mDepth) return true;
const auto usedPixelsPerRow = CheckedUint32(blob->mSkipPixels) + blob->mWidth;
if (!usedPixelsPerRow.isValid() ||
usedPixelsPerRow.value() > blob->mRowLength) {
webgl->ErrorInvalidOperation(
"UNPACK_SKIP_PIXELS + width >"
" UNPACK_ROW_LENGTH.");
return false;
}
if (blob->mHeight > blob->mImageHeight) {
webgl->ErrorInvalidOperation("height > UNPACK_IMAGE_HEIGHT.");
return false;
}
//////
// The spec doesn't bound SKIP_ROWS + height <= IMAGE_HEIGHT, unfortunately.
auto skipFullRows = CheckedUint32(blob->mSkipImages) * blob->mImageHeight;
skipFullRows += blob->mSkipRows;
MOZ_ASSERT(blob->mDepth >= 1);
MOZ_ASSERT(blob->mHeight >= 1);
auto usedFullRows = CheckedUint32(blob->mDepth - 1) * blob->mImageHeight;
usedFullRows +=
blob->mHeight - 1; // Full rows in the final image, excluding the tail.
const auto fullRowsNeeded = skipFullRows + usedFullRows;
if (!fullRowsNeeded.isValid()) {
webgl->ErrorOutOfMemory("Invalid calculation for required row count.");
return false;
}
if (fullRows > fullRowsNeeded.value()) return true;
if (fullRows == fullRowsNeeded.value() &&
tailPixels >= usedPixelsPerRow.value()) {
blob->mNeedsExactUpload = true;
return true;
}
webgl->ErrorInvalidOperation(
"Desired upload requires more data than is"
" available: (%u rows plus %u pixels needed, %u rows"
" plus %u pixels available)",
fullRowsNeeded.value(), usedPixelsPerRow.value(), fullRows, tailPixels);
return false;
}
static bool ValidateUnpackBytes(WebGLContext* webgl,
const webgl::PackingInfo& pi,
size_t availByteCount,
webgl::TexUnpackBlob* blob) {
if (!blob->mWidth || !blob->mHeight || !blob->mDepth) return true;
const auto bytesPerPixel = webgl::BytesPerPixel(pi);
const auto bytesPerRow = CheckedUint32(blob->mRowLength) * bytesPerPixel;
const auto rowStride = RoundUpToMultipleOf(bytesPerRow, blob->mAlignment);
const auto fullRows = availByteCount / rowStride;
if (!fullRows.isValid()) {
webgl->ErrorOutOfMemory("Unacceptable upload size calculated.");
return false;
}
const auto bodyBytes = fullRows.value() * rowStride.value();
const auto tailPixels = (availByteCount - bodyBytes) / bytesPerPixel;
return ValidateUnpackPixels(webgl, fullRows.value(), tailPixels, blob);
}
////////////////////
static uint32_t ZeroOn2D(TexImageTarget target, uint32_t val) {
return (IsTarget3D(target) ? val : 0);
}
static uint32_t FallbackOnZero(uint32_t val, uint32_t fallback) {
return (val ? val : fallback);
}
TexUnpackBlob::TexUnpackBlob(const WebGLContext* webgl, TexImageTarget target,
uint32_t rowLength, uint32_t width,
uint32_t height, uint32_t depth,
gfxAlphaType srcAlphaType)
: mAlignment(webgl->mPixelStore.mUnpackAlignment),
mRowLength(rowLength),
mImageHeight(FallbackOnZero(
ZeroOn2D(target, webgl->mPixelStore.mUnpackImageHeight), height))
,
mSkipPixels(webgl->mPixelStore.mUnpackSkipPixels),
mSkipRows(webgl->mPixelStore.mUnpackSkipRows),
mSkipImages(ZeroOn2D(target, webgl->mPixelStore.mUnpackSkipImages))
,
mWidth(width),
mHeight(height),
mDepth(depth)
,
mSrcAlphaType(srcAlphaType)
,
mNeedsExactUpload(false) {
MOZ_ASSERT_IF(!IsTarget3D(target), mDepth == 1);
}
static bool HasColorAndAlpha(const WebGLTexelFormat format) {
switch (format) {
case WebGLTexelFormat::RA8:
case WebGLTexelFormat::RA16F:
case WebGLTexelFormat::RA32F:
case WebGLTexelFormat::RGBA8:
case WebGLTexelFormat::RGBA5551:
case WebGLTexelFormat::RGBA4444:
case WebGLTexelFormat::RGBA16F:
case WebGLTexelFormat::RGBA32F:
case WebGLTexelFormat::BGRA8:
return true;
default:
return false;
}
}
bool TexUnpackBlob::ConvertIfNeeded(
WebGLContext* webgl, const uint32_t rowLength, const uint32_t rowCount,
WebGLTexelFormat srcFormat, const uint8_t* const srcBegin,
const ptrdiff_t srcStride, WebGLTexelFormat dstFormat,
const ptrdiff_t dstStride, const uint8_t** const out_begin,
UniqueBuffer* const out_anchoredBuffer) const {
MOZ_ASSERT(srcFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
MOZ_ASSERT(dstFormat != WebGLTexelFormat::FormatNotSupportingAnyConversion);
*out_begin = srcBegin;
if (!rowLength || !rowCount) return true;
const auto srcIsPremult = (mSrcAlphaType == gfxAlphaType::Premult);
const auto& dstIsPremult = webgl->mPixelStore.mPremultiplyAlpha;
const auto fnHasPremultMismatch = [&]() {
if (mSrcAlphaType == gfxAlphaType::Opaque) return false;
if (!HasColorAndAlpha(srcFormat)) return false;
return srcIsPremult != dstIsPremult;
};
const auto srcOrigin =
(webgl->mPixelStore.mFlipY ? gl::OriginPos::TopLeft
: gl::OriginPos::BottomLeft);
const auto dstOrigin = gl::OriginPos::BottomLeft;
if (srcFormat != dstFormat) {
webgl->GeneratePerfWarning(
"Conversion requires pixel reformatting. (%u->%u)", uint32_t(srcFormat),
uint32_t(dstFormat));
} else if (fnHasPremultMismatch()) {
webgl->GeneratePerfWarning(
"Conversion requires change in"
" alpha-premultiplication.");
} else if (srcOrigin != dstOrigin) {
webgl->GeneratePerfWarning("Conversion requires y-flip.");
} else if (srcStride != dstStride) {
webgl->GeneratePerfWarning("Conversion requires change in stride. (%u->%u)",
uint32_t(srcStride), uint32_t(dstStride));
} else {
return true;
}
////
const auto dstTotalBytes = CheckedUint32(rowCount) * dstStride;
if (!dstTotalBytes.isValid()) {
webgl->ErrorOutOfMemory("Calculation failed.");
return false;
}
UniqueBuffer dstBuffer = calloc(1u, (size_t)dstTotalBytes.value());
if (!dstBuffer.get()) {
webgl->ErrorOutOfMemory("Failed to allocate dest buffer.");
return false;
}
const auto dstBegin = static_cast<uint8_t*>(dstBuffer.get());
////
// And go!:
bool wasTrivial;
if (!ConvertImage(rowLength, rowCount, srcBegin, srcStride, srcOrigin,
srcFormat, srcIsPremult, dstBegin, dstStride, dstOrigin,
dstFormat, dstIsPremult, &wasTrivial)) {
webgl->ErrorImplementationBug("ConvertImage failed.");
return false;
}
*out_begin = dstBegin;
*out_anchoredBuffer = std::move(dstBuffer);
return true;
}
static GLenum DoTexOrSubImage(bool isSubImage, gl::GLContext* gl,
TexImageTarget target, GLint level,
const DriverUnpackInfo* dui, GLint xOffset,
GLint yOffset, GLint zOffset, GLsizei width,
GLsizei height, GLsizei depth, const void* data) {
if (isSubImage) {
return DoTexSubImage(gl, target, level, xOffset, yOffset, zOffset, width,
height, depth, dui->ToPacking(), data);
} else {
return DoTexImage(gl, target, level, dui, width, height, depth, data);
}
}
//////////////////////////////////////////////////////////////////////////////////////////
// TexUnpackBytes
TexUnpackBytes::TexUnpackBytes(const WebGLContext* webgl, TexImageTarget target,
uint32_t width, uint32_t height, uint32_t depth,
bool isClientData, const uint8_t* ptr,
size_t availBytes)
: TexUnpackBlob(webgl, target,
FallbackOnZero(webgl->mPixelStore.mUnpackRowLength, width),
width, height, depth, gfxAlphaType::NonPremult),
mIsClientData(isClientData),
mPtr(ptr),
mAvailBytes(availBytes) {}
bool TexUnpackBytes::Validate(WebGLContext* webgl,
const webgl::PackingInfo& pi) {
if (mIsClientData && !mPtr) return true;
return ValidateUnpackBytes(webgl, pi, mAvailBytes, this);
}
bool TexUnpackBytes::TexOrSubImage(bool isSubImage, bool needsRespec,
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.mFlipY && !webgl->mPixelStore.mPremultiplyAlpha) {
break;
}
if (webgl->mPixelStore.mUnpackImageHeight ||
webgl->mPixelStore.mUnpackSkipImages ||
webgl->mPixelStore.mUnpackRowLength ||
webgl->mPixelStore.mUnpackSkipRows ||
webgl->mPixelStore.mUnpackSkipPixels) {
webgl->ErrorInvalidOperation(
"Non-DOM-Element uploads with alpha-premult"
" or y-flip do not support subrect selection.");
return false;
}
webgl->GenerateWarning(
"Alpha-premult and y-flip are deprecated for"
" non-DOM-Element uploads.");
const uint32_t rowLength = mWidth;
const uint32_t rowCount = mHeight * mDepth;
const auto stride =
RoundUpToMultipleOf(rowLength * bytesPerPixel, mAlignment);
if (!ConvertIfNeeded(webgl, 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(
"Uploads from a buffer with a final row with a byte"
" count smaller than the row stride can incur extra"
" overhead.");
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.mUnpackAlignment);
gl->fPixelStorei(LOCAL_GL_UNPACK_IMAGE_HEIGHT,
webgl->mPixelStore.mUnpackImageHeight);
gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH,
webgl->mPixelStore.mUnpackRowLength);
gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_IMAGES,
webgl->mPixelStore.mUnpackSkipImages);
gl->fPixelStorei(LOCAL_GL_UNPACK_SKIP_ROWS,
webgl->mPixelStore.mUnpackSkipRows);
return true;
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// TexUnpackImage
TexUnpackImage::TexUnpackImage(const WebGLContext* webgl, TexImageTarget target,
uint32_t width, uint32_t height, uint32_t depth,
layers::Image* image, gfxAlphaType srcAlphaType)
: TexUnpackBlob(webgl, target, image->GetSize().width, width, height, depth,
srcAlphaType),
mImage(image) {}
TexUnpackImage::~TexUnpackImage() = default;
bool TexUnpackImage::Validate(WebGLContext* webgl,
const webgl::PackingInfo& pi) {
if (!ValidatePIForDOM(webgl, pi)) return false;
const auto fullRows = mImage->GetSize().height;
return ValidateUnpackPixels(webgl, fullRows, 0, this);
}
bool TexUnpackImage::TexOrSubImage(bool isSubImage, bool needsRespec,
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 {
MOZ_ASSERT_IF(needsRespec, !isSubImage);
WebGLContext* webgl = tex->mContext;
gl::GLContext* gl = webgl->GL();
if (needsRespec) {
*out_error =
DoTexOrSubImage(isSubImage, gl, target.get(), level, dui, xOffset,
yOffset, zOffset, mWidth, mHeight, mDepth, nullptr);
if (*out_error) return true;
}
const char* fallbackReason;
do {
if (mDepth != 1) {
fallbackReason = "depth is not 1";
break;
}
if (xOffset != 0 || yOffset != 0 || zOffset != 0) {
fallbackReason = "x/y/zOffset is not 0";
break;
}
if (webgl->mPixelStore.mUnpackSkipPixels ||
webgl->mPixelStore.mUnpackSkipRows ||
webgl->mPixelStore.mUnpackSkipImages) {
fallbackReason = "non-zero UNPACK_SKIP_* not yet supported";
break;
}
const auto fnHasPremultMismatch = [&]() {
if (mSrcAlphaType == gfxAlphaType::Opaque) return false;
const bool srcIsPremult = (mSrcAlphaType == gfxAlphaType::Premult);
const auto& dstIsPremult = webgl->mPixelStore.mPremultiplyAlpha;
if (srcIsPremult == dstIsPremult) return false;
if (dstIsPremult) {
fallbackReason = "UNPACK_PREMULTIPLY_ALPHA_WEBGL is not true";
} else {
fallbackReason = "UNPACK_PREMULTIPLY_ALPHA_WEBGL is not false";
}
return true;
};
if (fnHasPremultMismatch()) break;
if (dui->unpackFormat != LOCAL_GL_RGB &&
dui->unpackFormat != LOCAL_GL_RGBA) {
fallbackReason = "`format` is not RGB or RGBA";
break;
}
if (dui->unpackType != LOCAL_GL_UNSIGNED_BYTE) {
fallbackReason = "`type` is not UNSIGNED_BYTE";
break;
}
gl::ScopedFramebuffer scopedFB(gl);
gl::ScopedBindFramebuffer bindFB(gl, scopedFB.FB());
{
gl::GLContext::LocalErrorScope errorScope(*gl);
gl->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0, target.get(),
tex->mGLName, level);
if (errorScope.GetError()) {
fallbackReason = "bug: failed to attach to FB for blit";
break;
}
}
const GLenum status = gl->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
if (status != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
fallbackReason = "bug: failed to confirm FB for blit";
break;
}
const gfx::IntSize dstSize(mWidth, mHeight);
const auto dstOrigin =
(webgl->mPixelStore.mFlipY ? gl::OriginPos::TopLeft
: gl::OriginPos::BottomLeft);
if (!gl->BlitHelper()->BlitImageToFramebuffer(mImage, dstSize, dstOrigin)) {
fallbackReason = "likely bug: failed to blit";
break;
}
// Blitting was successful, so we're done!
*out_error = 0;
return true;
} while (false);
const nsPrintfCString perfMsg(
"Failed to hit GPU-copy fast-path: %s (src type %u)", fallbackReason,
uint32_t(mImage->GetFormat()));
if (webgl->mPixelStore.mRequireFastPath) {
webgl->ErrorInvalidOperation("%s", perfMsg.BeginReading());
return false;
}
webgl->GeneratePerfWarning("%s Falling back to CPU upload.",
perfMsg.BeginReading());
const RefPtr<gfx::SourceSurface> surf = mImage->GetAsSourceSurface();
RefPtr<gfx::DataSourceSurface> dataSurf;
if (surf) {
// WARNING: OSX can lose our MakeCurrent here.
dataSurf = surf->GetDataSurface();
}
if (!dataSurf) {
webgl->ErrorOutOfMemory(
"GetAsSourceSurface or GetDataSurface failed after"
" blit failed for TexUnpackImage.");
return false;
}
const TexUnpackSurface surfBlob(webgl, target, mWidth, mHeight, mDepth,
dataSurf, mSrcAlphaType);
return surfBlob.TexOrSubImage(isSubImage, needsRespec, tex, target, level,
dui, xOffset, yOffset, zOffset, pi, out_error);
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// TexUnpackSurface
TexUnpackSurface::TexUnpackSurface(const WebGLContext* webgl,
TexImageTarget target, uint32_t width,
uint32_t height, uint32_t depth,
gfx::DataSourceSurface* surf,
gfxAlphaType srcAlphaType)
: TexUnpackBlob(webgl, target, surf->GetSize().width, width, height, depth,
srcAlphaType),
mSurf(surf) {}
//////////
static bool GetFormatForSurf(gfx::SourceSurface* surf,
WebGLTexelFormat* const out_texelFormat,
uint8_t* const out_bpp) {
const auto surfFormat = surf->GetFormat();
switch (surfFormat) {
case gfx::SurfaceFormat::B8G8R8A8:
*out_texelFormat = WebGLTexelFormat::BGRA8;
*out_bpp = 4;
return true;
case gfx::SurfaceFormat::B8G8R8X8:
*out_texelFormat = WebGLTexelFormat::BGRX8;
*out_bpp = 4;
return true;
case gfx::SurfaceFormat::R8G8B8A8:
*out_texelFormat = WebGLTexelFormat::RGBA8;
*out_bpp = 4;
return true;
case gfx::SurfaceFormat::R8G8B8X8:
*out_texelFormat = WebGLTexelFormat::RGBX8;
*out_bpp = 4;
return true;
case gfx::SurfaceFormat::R5G6B5_UINT16:
*out_texelFormat = WebGLTexelFormat::RGB565;
*out_bpp = 2;
return true;
case gfx::SurfaceFormat::A8:
*out_texelFormat = WebGLTexelFormat::A8;
*out_bpp = 1;
return true;
case gfx::SurfaceFormat::YUV:
// Ugh...
NS_ERROR("We don't handle uploads from YUV sources yet.");
// When we want to, check out gfx/ycbcr/YCbCrUtils.h. (specifically
// GetYCbCrToRGBDestFormatAndSize and ConvertYCbCrToRGB)
return false;
default:
return false;
}
}
//////////
bool TexUnpackSurface::Validate(WebGLContext* webgl,
const webgl::PackingInfo& pi) {
if (!ValidatePIForDOM(webgl, pi)) return false;
const auto fullRows = mSurf->GetSize().height;
return ValidateUnpackPixels(webgl, fullRows, 0, this);
}
bool TexUnpackSurface::TexOrSubImage(
bool isSubImage, bool needsRespec, 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(
"GetFormatForSurf failed for"
" WebGLTexelFormat::%u.",
uint32_t(mSurf->GetFormat()));
return false;
}
gfx::DataSourceSurface::ScopedMap map(mSurf,
gfx::DataSourceSurface::MapType::READ);
if (!map.IsMapped()) {
webgl->ErrorOutOfMemory("Failed to map source surface for upload.");
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, 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.mUnpackAlignment);
if (webgl->IsWebGL2()) {
gl->fPixelStorei(LOCAL_GL_UNPACK_ROW_LENGTH,
webgl->mPixelStore.mUnpackRowLength);
}
return true;
}
} // namespace webgl
} // namespace mozilla
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