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gecko-dev/dom/canvas/WebGLTexture.cpp

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35 KiB
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/* -*- Mode: C++; tab-width: 20; 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/. */
#include "WebGLTexture.h"
#include <algorithm>
#include "GLContext.h"
#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/Scoped.h"
#include "mozilla/unused.h"
#include "ScopedGLHelpers.h"
#include "WebGLContext.h"
#include "WebGLContextUtils.h"
#include "WebGLFramebuffer.h"
#include "WebGLTexelConversions.h"
namespace mozilla {
/*static*/ const WebGLTexture::ImageInfo WebGLTexture::ImageInfo::kUndefined;
////////////////////////////////////////
template <typename T>
static inline T&
Mutable(const T& x)
{
return const_cast<T&>(x);
}
void
WebGLTexture::ImageInfo::Clear()
{
if (!IsDefined())
return;
OnRespecify();
Mutable(mFormat) = LOCAL_GL_NONE;
Mutable(mWidth) = 0;
Mutable(mHeight) = 0;
Mutable(mDepth) = 0;
MOZ_ASSERT(!IsDefined());
}
WebGLTexture::ImageInfo&
WebGLTexture::ImageInfo::operator =(const ImageInfo& a)
{
MOZ_ASSERT(a.IsDefined());
Mutable(mFormat) = a.mFormat;
Mutable(mWidth) = a.mWidth;
Mutable(mHeight) = a.mHeight;
Mutable(mDepth) = a.mDepth;
mIsDataInitialized = a.mIsDataInitialized;
// But *don't* transfer mAttachPoints!
MOZ_ASSERT(a.mAttachPoints.empty());
OnRespecify();
return *this;
}
bool
WebGLTexture::ImageInfo::IsPowerOfTwo() const
{
return mozilla::IsPowerOfTwo(mWidth) &&
mozilla::IsPowerOfTwo(mHeight) &&
mozilla::IsPowerOfTwo(mDepth);
}
void
WebGLTexture::ImageInfo::AddAttachPoint(WebGLFBAttachPoint* attachPoint)
{
const auto pair = mAttachPoints.insert(attachPoint);
DebugOnly<bool> didInsert = pair.second;
MOZ_ASSERT(didInsert);
}
void
WebGLTexture::ImageInfo::RemoveAttachPoint(WebGLFBAttachPoint* attachPoint)
{
DebugOnly<size_t> numElemsErased = mAttachPoints.erase(attachPoint);
MOZ_ASSERT_IF(IsDefined(), numElemsErased == 1);
}
void
WebGLTexture::ImageInfo::OnRespecify() const
{
for (auto cur : mAttachPoints) {
cur->OnBackingStoreRespecified();
}
}
size_t
WebGLTexture::ImageInfo::MemoryUsage() const
{
if (!IsDefined())
return 0;
const auto bytesPerTexel = mFormat->format->estimatedBytesPerPixel;
return size_t(mWidth) * size_t(mHeight) * size_t(mDepth) * bytesPerTexel;
}
void
WebGLTexture::ImageInfo::SetIsDataInitialized(bool isDataInitialized, WebGLTexture* tex)
{
MOZ_ASSERT(tex);
MOZ_ASSERT(this >= &tex->mImageInfoArr[0]);
MOZ_ASSERT(this < &tex->mImageInfoArr[kMaxLevelCount * kMaxFaceCount]);
mIsDataInitialized = isDataInitialized;
tex->InvalidateResolveCache();
}
////////////////////////////////////////
JSObject*
WebGLTexture::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto) {
return dom::WebGLTextureBinding::Wrap(cx, this, givenProto);
}
WebGLTexture::WebGLTexture(WebGLContext* webgl, GLuint tex)
: WebGLContextBoundObject(webgl)
, mGLName(tex)
, mTarget(LOCAL_GL_NONE)
, mFaceCount(0)
, mMinFilter(LOCAL_GL_NEAREST_MIPMAP_LINEAR)
, mMagFilter(LOCAL_GL_LINEAR)
, mWrapS(LOCAL_GL_REPEAT)
, mWrapT(LOCAL_GL_REPEAT)
, mImmutable(false)
, mImmutableLevelCount(0)
, mBaseMipmapLevel(0)
, mMaxMipmapLevel(1000)
, mTexCompareMode(LOCAL_GL_NONE)
, mIsResolved(false)
, mResolved_Swizzle(nullptr)
{
mContext->mTextures.insertBack(this);
}
void
WebGLTexture::Delete()
{
for (auto& cur : mImageInfoArr) {
cur.Clear();
}
mContext->MakeContextCurrent();
mContext->gl->fDeleteTextures(1, &mGLName);
LinkedListElement<WebGLTexture>::removeFrom(mContext->mTextures);
}
size_t
WebGLTexture::MemoryUsage() const
{
if (IsDeleted())
return 0;
size_t accum = 0;
for (const auto& cur : mImageInfoArr) {
accum += cur.MemoryUsage();
}
return accum;
}
void
WebGLTexture::SetImageInfo(ImageInfo* target, const ImageInfo& newInfo)
{
*target = newInfo;
InvalidateResolveCache();
}
void
WebGLTexture::SetImageInfosAtLevel(uint32_t level, const ImageInfo& newInfo)
{
for (uint8_t i = 0; i < mFaceCount; i++) {
ImageInfoAtFace(i, level) = newInfo;
}
InvalidateResolveCache();
}
bool
WebGLTexture::IsMipmapComplete(uint32_t texUnit) const
{
MOZ_ASSERT(DoesMinFilterRequireMipmap());
// GLES 3.0.4, p161
const uint32_t maxLevel = MaxEffectiveMipmapLevel(texUnit);
// "* `level_base <= level_max`"
if (mBaseMipmapLevel > maxLevel)
return false;
// Make a copy so we can modify it.
const ImageInfo& baseImageInfo = BaseImageInfo();
if (!baseImageInfo.IsDefined())
return false;
// Reference dimensions based on the current level.
uint32_t refWidth = baseImageInfo.mWidth;
uint32_t refHeight = baseImageInfo.mHeight;
uint32_t refDepth = baseImageInfo.mDepth;
MOZ_ASSERT(refWidth && refHeight && refDepth);
for (uint32_t level = mBaseMipmapLevel; level <= maxLevel; level++) {
// "A cube map texture is mipmap complete if each of the six texture images,
// considered individually, is mipmap complete."
for (uint8_t face = 0; face < mFaceCount; face++) {
const ImageInfo& cur = ImageInfoAtFace(face, level);
// "* The set of mipmap arrays `level_base` through `q` (where `q` is defined
// the "Mipmapping" discussion of section 3.8.10) were each specified with
// the same effective internal format."
// "* The dimensions of the arrays follow the sequence described in the
// "Mipmapping" discussion of section 3.8.10."
if (cur.mWidth != refWidth ||
cur.mHeight != refHeight ||
cur.mDepth != refDepth ||
cur.mFormat != baseImageInfo.mFormat)
{
return false;
}
}
// GLES 3.0.4, p158:
// "[...] until the last array is reached with dimension 1 x 1 x 1."
if (refWidth == 1 &&
refHeight == 1 &&
refDepth == 1)
{
break;
}
refWidth = std::max(uint32_t(1), refWidth / 2);
refHeight = std::max(uint32_t(1), refHeight / 2);
refDepth = std::max(uint32_t(1), refDepth / 2);
}
return true;
}
bool
WebGLTexture::IsCubeComplete() const
{
// GLES 3.0.4, p161
// "[...] a cube map texture is cube complete if the following conditions all hold
// true:
// * The `level_base` arrays of each of the six texture images making up the cube map
// have identical, positive, and square dimensions.
// * The `level_base` arrays were each specified with the same effective internal
// format."
// Note that "cube complete" does not imply "mipmap complete".
const ImageInfo& reference = BaseImageInfo();
if (!reference.IsDefined())
return false;
auto refWidth = reference.mWidth;
auto refFormat = reference.mFormat;
for (uint8_t face = 0; face < mFaceCount; face++) {
const ImageInfo& cur = ImageInfoAtFace(face, mBaseMipmapLevel);
if (!cur.IsDefined())
return false;
MOZ_ASSERT(cur.mDepth == 1);
if (cur.mFormat != refFormat || // Check effective formats.
cur.mWidth != refWidth || // Check both width and height against refWidth to
cur.mHeight != refWidth) // to enforce positive and square dimensions.
{
return false;
}
}
return true;
}
bool
WebGLTexture::IsComplete(uint32_t texUnit, const char** const out_reason) const
{
// Texture completeness is established at GLES 3.0.4, p160-161.
// "[A] texture is complete unless any of the following conditions hold true:"
// "* Any dimension of the `level_base` array is not positive."
const ImageInfo& baseImageInfo = BaseImageInfo();
if (!baseImageInfo.IsDefined()) {
// In case of undefined texture image, we don't print any message because this is
// a very common and often legitimate case (asynchronous texture loading).
*out_reason = nullptr;
return false;
}
if (!baseImageInfo.mWidth || !baseImageInfo.mHeight || !baseImageInfo.mDepth) {
*out_reason = "The dimensions of `level_base` are not all positive.";
return false;
}
// "* The texture is a cube map texture, and is not cube complete."
if (IsCubeMap() && !IsCubeComplete()) {
*out_reason = "Cubemaps must be \"cube complete\".";
return false;
}
WebGLSampler* sampler = mContext->mBoundSamplers[texUnit];
TexMinFilter minFilter = sampler ? sampler->mMinFilter : mMinFilter;
TexMagFilter magFilter = sampler ? sampler->mMagFilter : mMagFilter;
// "* The minification filter requires a mipmap (is neither NEAREST nor LINEAR) and
// the texture is not mipmap complete."
const bool requiresMipmap = (minFilter != LOCAL_GL_NEAREST &&
minFilter != LOCAL_GL_LINEAR);
if (requiresMipmap && !IsMipmapComplete(texUnit)) {
*out_reason = "Because the minification filter requires mipmapping, the texture"
" must be \"mipmap complete\".";
return false;
}
const bool isMinFilteringNearest = (minFilter == LOCAL_GL_NEAREST ||
minFilter == LOCAL_GL_NEAREST_MIPMAP_NEAREST);
const bool isMagFilteringNearest = (magFilter == LOCAL_GL_NEAREST);
const bool isFilteringNearestOnly = (isMinFilteringNearest && isMagFilteringNearest);
if (!isFilteringNearestOnly) {
auto formatUsage = baseImageInfo.mFormat;
auto format = formatUsage->format;
// "* The effective internal format specified for the texture arrays is a sized
// internal color format that is not texture-filterable, and either the
// magnification filter is not NEAREST or the minification filter is neither
// NEAREST nor NEAREST_MIPMAP_NEAREST."
// Since all (GLES3) unsized color formats are filterable just like their sized
// equivalents, we don't have to care whether its sized or not.
if (format->isColorFormat && !formatUsage->isFilterable) {
*out_reason = "Because minification or magnification filtering is not NEAREST"
" or NEAREST_MIPMAP_NEAREST, and the texture's format is a"
" color format, its format must be \"texture-filterable\".";
return false;
}
// "* The effective internal format specified for the texture arrays is a sized
// internal depth or depth and stencil format, the value of
// TEXTURE_COMPARE_MODE is NONE[1], and either the magnification filter is not
// NEAREST, or the minification filter is neither NEAREST nor
// NEAREST_MIPMAP_NEAREST."
// [1]: This sounds suspect, but is explicitly noted in the change log for GLES
// 3.0.1:
// "* Clarify that a texture is incomplete if it has a depth component, no
// shadow comparison, and linear filtering (also Bug 9481)."
// As of OES_packed_depth_stencil rev #3, the sample code explicitly samples from
// a DEPTH_STENCIL_OES texture with a min-filter of LINEAR. Therefore we relax
// this restriction if WEBGL_depth_texture is enabled.
if (!mContext->IsExtensionEnabled(WebGLExtensionID::WEBGL_depth_texture)) {
if (format->hasDepth && mTexCompareMode != LOCAL_GL_NONE) {
*out_reason = "A depth or depth-stencil format with TEXTURE_COMPARE_MODE"
" of NONE must have minification or magnification filtering"
" of NEAREST or NEAREST_MIPMAP_NEAREST.";
return false;
}
}
}
// Texture completeness is effectively (though not explicitly) amended for GLES2 by
// the "Texture Access" section under $3.8 "Fragment Shaders". This also applies to
// vertex shaders, as noted on GLES 2.0.25, p41.
if (!mContext->IsWebGL2()) {
// GLES 2.0.25, p87-88:
// "Calling a sampler from a fragment shader will return (R,G,B,A)=(0,0,0,1) if
// any of the following conditions are true:"
// "* A two-dimensional sampler is called, the minification filter is one that
// requires a mipmap[...], and the sampler's associated texture object is not
// complete[.]"
// (already covered)
// "* A two-dimensional sampler is called, the minification filter is not one that
// requires a mipmap (either NEAREST nor[sic] LINEAR), and either dimension of
// the level zero array of the associated texture object is not positive."
// (already covered)
// "* A two-dimensional sampler is called, the corresponding texture image is a
// non-power-of-two image[...], and either the texture wrap mode is not
// CLAMP_TO_EDGE, or the minification filter is neither NEAREST nor LINEAR."
// "* A cube map sampler is called, any of the corresponding texture images are
// non-power-of-two images, and either the texture wrap mode is not
// CLAMP_TO_EDGE, or the minification filter is neither NEAREST nor LINEAR."
if (!baseImageInfo.IsPowerOfTwo()) {
TexWrap wrapS = sampler ? sampler->mWrapS : mWrapS;
TexWrap wrapT = sampler ? sampler->mWrapT : mWrapT;
// "either the texture wrap mode is not CLAMP_TO_EDGE"
if (wrapS != LOCAL_GL_CLAMP_TO_EDGE ||
wrapT != LOCAL_GL_CLAMP_TO_EDGE)
{
*out_reason = "Non-power-of-two textures must have a wrap mode of"
" CLAMP_TO_EDGE.";
return false;
}
// "or the minification filter is neither NEAREST nor LINEAR"
if (requiresMipmap) {
*out_reason = "Mipmapping requires power-of-two textures.";
return false;
}
}
// "* A cube map sampler is called, and either the corresponding cube map texture
// image is not cube complete, or TEXTURE_MIN_FILTER is one that requires a
// mipmap and the texture is not mipmap cube complete."
// (already covered)
}
return true;
}
uint32_t
WebGLTexture::MaxEffectiveMipmapLevel(uint32_t texUnit) const
{
WebGLSampler* sampler = mContext->mBoundSamplers[texUnit];
TexMinFilter minFilter = sampler ? sampler->mMinFilter : mMinFilter;
if (minFilter == LOCAL_GL_NEAREST ||
minFilter == LOCAL_GL_LINEAR)
{
// No mips used.
return mBaseMipmapLevel;
}
const auto& imageInfo = BaseImageInfo();
MOZ_ASSERT(imageInfo.IsDefined());
uint32_t maxLevelBySize = mBaseMipmapLevel + imageInfo.MaxMipmapLevels() - 1;
return std::min<uint32_t>(maxLevelBySize, mMaxMipmapLevel);
}
bool
WebGLTexture::GetFakeBlackType(const char* funcName, uint32_t texUnit,
FakeBlackType* const out_fakeBlack)
{
const char* incompleteReason;
if (!IsComplete(texUnit, &incompleteReason)) {
if (incompleteReason) {
mContext->GenerateWarning("%s: Active texture %u for target 0x%04x is"
" 'incomplete', and will be rendered as"
" RGBA(0,0,0,1), as per the GLES 2.0.24 $3.8.2: %s",
funcName, texUnit, mTarget.get(),
incompleteReason);
}
*out_fakeBlack = FakeBlackType::RGBA0001;
return true;
}
// We may still want FakeBlack as an optimization for uninitialized image data.
bool hasUninitializedData = false;
bool hasInitializedData = false;
const auto maxLevel = MaxEffectiveMipmapLevel(texUnit);
MOZ_ASSERT(mBaseMipmapLevel <= maxLevel);
for (uint32_t level = mBaseMipmapLevel; level <= maxLevel; level++) {
for (uint8_t face = 0; face < mFaceCount; face++) {
const auto& cur = ImageInfoAtFace(face, level);
if (cur.IsDataInitialized())
hasInitializedData = true;
else
hasUninitializedData = true;
}
}
MOZ_ASSERT(hasUninitializedData || hasInitializedData);
if (!hasUninitializedData) {
*out_fakeBlack = FakeBlackType::None;
return true;
}
if (!hasInitializedData) {
const auto format = ImageInfoAtFace(0, mBaseMipmapLevel).mFormat->format;
if (format->isColorFormat) {
*out_fakeBlack = (format->hasAlpha ? FakeBlackType::RGBA0000
: FakeBlackType::RGBA0001);
return true;
}
mContext->GenerateWarning("%s: Active texture %u for target 0x%04x is"
" uninitialized, and will be (perhaps slowly) cleared"
" by the implementation.",
funcName, texUnit, mTarget.get());
} else {
mContext->GenerateWarning("%s: Active texture %u for target 0x%04x contains"
" TexImages with uninitialized data along with"
" TexImages with initialized data, forcing the"
" implementation to (slowly) initialize the"
" uninitialized TexImages.",
funcName, texUnit, mTarget.get());
}
GLenum baseImageTarget = mTarget.get();
if (baseImageTarget == LOCAL_GL_TEXTURE_CUBE_MAP)
baseImageTarget = LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X;
for (uint32_t level = mBaseMipmapLevel; level <= maxLevel; level++) {
for (uint8_t face = 0; face < mFaceCount; face++) {
TexImageTarget imageTarget = baseImageTarget + face;
if (!EnsureImageDataInitialized(funcName, imageTarget, level))
return false; // The world just exploded.
}
}
*out_fakeBlack = FakeBlackType::None;
return true;
}
static void
SetSwizzle(gl::GLContext* gl, TexTarget target, const GLint* swizzle)
{
static const GLint kNoSwizzle[4] = { LOCAL_GL_RED, LOCAL_GL_GREEN, LOCAL_GL_BLUE,
LOCAL_GL_ALPHA };
if (!swizzle) {
swizzle = kNoSwizzle;
} else if (!gl->IsSupported(gl::GLFeature::texture_swizzle)) {
MOZ_CRASH("Needs swizzle feature to swizzle!");
}
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_R, swizzle[0]);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_G, swizzle[1]);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_B, swizzle[2]);
gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_SWIZZLE_A, swizzle[3]);
}
bool
WebGLTexture::ResolveForDraw(const char* funcName, uint32_t texUnit,
FakeBlackType* const out_fakeBlack)
{
if (!mIsResolved) {
if (!GetFakeBlackType(funcName, texUnit, &mResolved_FakeBlack))
return false;
// Check which swizzle we should use. Since the texture must be complete at this
// point, just grab the format off any valid image.
const GLint* newSwizzle = nullptr;
if (mResolved_FakeBlack == FakeBlackType::None) {
const auto& cur = ImageInfoAtFace(0, mBaseMipmapLevel);
newSwizzle = cur.mFormat->textureSwizzleRGBA;
}
// Only set the swizzle if it changed since last time we did it.
if (newSwizzle != mResolved_Swizzle) {
mResolved_Swizzle = newSwizzle;
// Set the new swizzle!
mContext->gl->fActiveTexture(LOCAL_GL_TEXTURE0 + texUnit);
SetSwizzle(mContext->gl, mTarget, mResolved_Swizzle);
mContext->gl->fActiveTexture(LOCAL_GL_TEXTURE0 + mContext->mActiveTexture);
}
mIsResolved = true;
}
*out_fakeBlack = mResolved_FakeBlack;
return true;
}
bool
WebGLTexture::EnsureImageDataInitialized(const char* funcName, TexImageTarget target,
uint32_t level)
{
auto& imageInfo = ImageInfoAt(target, level);
MOZ_ASSERT(imageInfo.IsDefined());
if (imageInfo.IsDataInitialized())
return true;
return InitializeImageData(funcName, target, level);
}
bool
WebGLTexture::InitializeImageData(const char* funcName, TexImageTarget target,
uint32_t level)
{
auto& imageInfo = ImageInfoAt(target, level);
MOZ_ASSERT(imageInfo.IsDefined());
MOZ_ASSERT(!imageInfo.IsDataInitialized());
const bool respecifyTexture = false;
const auto& usage = imageInfo.mFormat;
const auto& width = imageInfo.mWidth;
const auto& height = imageInfo.mHeight;
const auto& depth = imageInfo.mDepth;
if (!ZeroTextureData(mContext, funcName, respecifyTexture, mGLName, target, level,
usage, 0, 0, 0, width, height, depth))
{
return false;
}
imageInfo.SetIsDataInitialized(true, this);
return true;
}
void
WebGLTexture::ClampLevelBaseAndMax()
{
if (!mImmutable)
return;
// GLES 3.0.4, p158:
// "For immutable-format textures, `level_base` is clamped to the range
// `[0, levels-1]`, `level_max` is then clamped to the range `
// `[level_base, levels-1]`, where `levels` is the parameter passed to
// TexStorage* for the texture object."
mBaseMipmapLevel = Clamp<uint32_t>(mBaseMipmapLevel, 0, mImmutableLevelCount - 1);
mMaxMipmapLevel = Clamp<uint32_t>(mMaxMipmapLevel, mBaseMipmapLevel,
mImmutableLevelCount - 1);
}
void
WebGLTexture::PopulateMipChain(uint32_t firstLevel, uint32_t lastLevel)
{
const ImageInfo& baseImageInfo = ImageInfoAtFace(0, firstLevel);
MOZ_ASSERT(baseImageInfo.IsDefined());
uint32_t refWidth = baseImageInfo.mWidth;
uint32_t refHeight = baseImageInfo.mHeight;
uint32_t refDepth = baseImageInfo.mDepth;
if (!refWidth || !refHeight || !refDepth)
return;
for (uint32_t level = firstLevel + 1; level <= lastLevel; level++) {
bool isMinimal = (refWidth == 1 &&
refHeight == 1);
if (mTarget == LOCAL_GL_TEXTURE_3D) {
isMinimal &= (refDepth == 1);
}
// Higher levels are unaffected.
if (isMinimal)
break;
refWidth = std::max(uint32_t(1), refWidth / 2);
refHeight = std::max(uint32_t(1), refHeight / 2);
if (mTarget == LOCAL_GL_TEXTURE_3D) { // But not TEXTURE_2D_ARRAY!
refDepth = std::max(uint32_t(1), refDepth / 2);
}
const ImageInfo cur(baseImageInfo.mFormat, refWidth, refHeight, refDepth,
baseImageInfo.IsDataInitialized());
SetImageInfosAtLevel(level, cur);
}
}
//////////////////////////////////////////////////////////////////////////////////////////
// GL calls
bool
WebGLTexture::BindTexture(TexTarget texTarget)
{
// silently ignore a deleted texture
if (IsDeleted())
return false;
const bool isFirstBinding = !HasEverBeenBound();
if (!isFirstBinding && mTarget != texTarget) {
mContext->ErrorInvalidOperation("bindTexture: This texture has already been bound"
" to a different target.");
return false;
}
mTarget = texTarget;
mContext->gl->fBindTexture(mTarget.get(), mGLName);
if (isFirstBinding) {
mFaceCount = IsCubeMap() ? 6 : 1;
gl::GLContext* gl = mContext->gl;
// Thanks to the WebKit people for finding this out: GL_TEXTURE_WRAP_R
// is not present in GLES 2, but is present in GL and it seems as if for
// cube maps we need to set it to GL_CLAMP_TO_EDGE to get the expected
// GLES behavior.
// If we are WebGL 2 though, we'll want to leave it as REPEAT.
const bool hasWrapR = gl->IsSupported(gl::GLFeature::texture_3D);
if (IsCubeMap() && hasWrapR && !mContext->IsWebGL2()) {
gl->fTexParameteri(texTarget.get(), LOCAL_GL_TEXTURE_WRAP_R,
LOCAL_GL_CLAMP_TO_EDGE);
}
}
return true;
}
void
WebGLTexture::GenerateMipmap(TexTarget texTarget)
{
// GLES 3.0.4 p160:
// "Mipmap generation replaces texel array levels level base + 1 through q with arrays
// derived from the level base array, regardless of their previous contents. All
// other mipmap arrays, including the level base array, are left unchanged by this
// computation."
const ImageInfo& baseImageInfo = BaseImageInfo();
if (!baseImageInfo.IsDefined()) {
mContext->ErrorInvalidOperation("generateMipmap: The base level of the texture is"
" not defined.");
return;
}
if (IsCubeMap() && !IsCubeComplete()) {
mContext->ErrorInvalidOperation("generateMipmap: Cube maps must be \"cube"
" complete\".");
return;
}
if (!mContext->IsWebGL2() && !baseImageInfo.IsPowerOfTwo()) {
mContext->ErrorInvalidOperation("generateMipmap: The base level of the texture"
" does not have power-of-two dimensions.");
return;
}
auto format = baseImageInfo.mFormat->format;
if (format->compression) {
mContext->ErrorInvalidOperation("generateMipmap: Texture data at base level is"
" compressed.");
return;
}
if (format->hasDepth) {
mContext->ErrorInvalidOperation("generateMipmap: Depth textures are not"
" supported.");
return;
}
// OpenGL ES 3.0.4 p160:
// If the level base array was not specified with an unsized internal format from
// table 3.3 or a sized internal format that is both color-renderable and
// texture-filterable according to table 3.13, an INVALID_OPERATION error
// is generated.
const auto usage = baseImageInfo.mFormat;
bool canGenerateMipmap = (usage->isRenderable && usage->isFilterable);
switch (usage->format->effectiveFormat) {
case webgl::EffectiveFormat::Luminance8:
case webgl::EffectiveFormat::Alpha8:
case webgl::EffectiveFormat::Luminance8Alpha8:
// Non-color-renderable formats from Table 3.3.
canGenerateMipmap = true;
break;
default:
break;
}
if (!canGenerateMipmap) {
mContext->ErrorInvalidOperation("generateMipmap: Texture at base level is not unsized"
" internal format or is not"
" color-renderable or texture-filterable.");
return;
}
// Done with validation. Do the operation.
mContext->MakeContextCurrent();
gl::GLContext* gl = mContext->gl;
if (gl->WorkAroundDriverBugs()) {
// bug 696495 - to work around failures in the texture-mips.html test on various drivers, we
// set the minification filter before calling glGenerateMipmap. This should not carry a significant performance
// overhead so we do it unconditionally.
//
// note that the choice of GL_NEAREST_MIPMAP_NEAREST really matters. See Chromium bug 101105.
gl->fTexParameteri(texTarget.get(), LOCAL_GL_TEXTURE_MIN_FILTER,
LOCAL_GL_NEAREST_MIPMAP_NEAREST);
gl->fGenerateMipmap(texTarget.get());
gl->fTexParameteri(texTarget.get(), LOCAL_GL_TEXTURE_MIN_FILTER,
mMinFilter.get());
} else {
gl->fGenerateMipmap(texTarget.get());
}
// Record the results.
// Note that we don't use MaxEffectiveMipmapLevel() here, since that returns
// mBaseMipmapLevel if the min filter doesn't require mipmaps.
const uint32_t lastLevel = mBaseMipmapLevel + baseImageInfo.MaxMipmapLevels() - 1;
PopulateMipChain(mBaseMipmapLevel, lastLevel);
}
JS::Value
WebGLTexture::GetTexParameter(TexTarget texTarget, GLenum pname)
{
mContext->MakeContextCurrent();
GLint i = 0;
GLfloat f = 0.0f;
switch (pname) {
case LOCAL_GL_TEXTURE_MIN_FILTER:
case LOCAL_GL_TEXTURE_MAG_FILTER:
case LOCAL_GL_TEXTURE_WRAP_S:
case LOCAL_GL_TEXTURE_WRAP_T:
case LOCAL_GL_TEXTURE_BASE_LEVEL:
case LOCAL_GL_TEXTURE_COMPARE_FUNC:
case LOCAL_GL_TEXTURE_COMPARE_MODE:
case LOCAL_GL_TEXTURE_IMMUTABLE_LEVELS:
case LOCAL_GL_TEXTURE_MAX_LEVEL:
case LOCAL_GL_TEXTURE_SWIZZLE_A:
case LOCAL_GL_TEXTURE_SWIZZLE_B:
case LOCAL_GL_TEXTURE_SWIZZLE_G:
case LOCAL_GL_TEXTURE_SWIZZLE_R:
case LOCAL_GL_TEXTURE_WRAP_R:
mContext->gl->fGetTexParameteriv(texTarget.get(), pname, &i);
return JS::NumberValue(uint32_t(i));
case LOCAL_GL_TEXTURE_IMMUTABLE_FORMAT:
mContext->gl->fGetTexParameteriv(texTarget.get(), pname, &i);
return JS::BooleanValue(bool(i));
case LOCAL_GL_TEXTURE_MAX_ANISOTROPY_EXT:
case LOCAL_GL_TEXTURE_MAX_LOD:
case LOCAL_GL_TEXTURE_MIN_LOD:
mContext->gl->fGetTexParameterfv(texTarget.get(), pname, &f);
return JS::NumberValue(float(f));
default:
MOZ_CRASH("Unhandled pname.");
}
}
bool
WebGLTexture::IsTexture() const
{
return HasEverBeenBound() && !IsDeleted();
}
// Here we have to support all pnames with both int and float params.
// See this discussion:
// https://www.khronos.org/webgl/public-mailing-list/archives/1008/msg00014.html
void
WebGLTexture::TexParameter(TexTarget texTarget, GLenum pname, GLint* maybeIntParam,
GLfloat* maybeFloatParam)
{
MOZ_ASSERT(maybeIntParam || maybeFloatParam);
GLint intParam = maybeIntParam ? *maybeIntParam : GLint(*maybeFloatParam);
GLfloat floatParam = maybeFloatParam ? *maybeFloatParam : GLfloat(*maybeIntParam);
bool isPNameValid = false;
switch (pname) {
// GLES 2.0.25 p76:
case LOCAL_GL_TEXTURE_WRAP_S:
case LOCAL_GL_TEXTURE_WRAP_T:
case LOCAL_GL_TEXTURE_MIN_FILTER:
case LOCAL_GL_TEXTURE_MAG_FILTER:
isPNameValid = true;
break;
// GLES 3.0.4 p149-150:
case LOCAL_GL_TEXTURE_BASE_LEVEL:
case LOCAL_GL_TEXTURE_COMPARE_MODE:
case LOCAL_GL_TEXTURE_COMPARE_FUNC:
case LOCAL_GL_TEXTURE_MAX_LEVEL:
case LOCAL_GL_TEXTURE_MAX_LOD:
case LOCAL_GL_TEXTURE_MIN_LOD:
case LOCAL_GL_TEXTURE_WRAP_R:
if (mContext->IsWebGL2())
isPNameValid = true;
break;
case LOCAL_GL_TEXTURE_MAX_ANISOTROPY_EXT:
if (mContext->IsExtensionEnabled(WebGLExtensionID::EXT_texture_filter_anisotropic))
isPNameValid = true;
break;
}
if (!isPNameValid) {
mContext->ErrorInvalidEnumInfo("texParameter: pname", pname);
return;
}
////////////////
// Validate params and invalidate if needed.
bool paramBadEnum = false;
bool paramBadValue = false;
switch (pname) {
case LOCAL_GL_TEXTURE_BASE_LEVEL:
case LOCAL_GL_TEXTURE_MAX_LEVEL:
paramBadValue = (intParam < 0);
break;
case LOCAL_GL_TEXTURE_COMPARE_MODE:
paramBadValue = (intParam != LOCAL_GL_NONE &&
intParam != LOCAL_GL_COMPARE_REF_TO_TEXTURE);
break;
case LOCAL_GL_TEXTURE_COMPARE_FUNC:
switch (intParam) {
case LOCAL_GL_LEQUAL:
case LOCAL_GL_GEQUAL:
case LOCAL_GL_LESS:
case LOCAL_GL_GREATER:
case LOCAL_GL_EQUAL:
case LOCAL_GL_NOTEQUAL:
case LOCAL_GL_ALWAYS:
case LOCAL_GL_NEVER:
break;
default:
paramBadValue = true;
break;
}
break;
case LOCAL_GL_TEXTURE_MIN_FILTER:
switch (intParam) {
case LOCAL_GL_NEAREST:
case LOCAL_GL_LINEAR:
case LOCAL_GL_NEAREST_MIPMAP_NEAREST:
case LOCAL_GL_LINEAR_MIPMAP_NEAREST:
case LOCAL_GL_NEAREST_MIPMAP_LINEAR:
case LOCAL_GL_LINEAR_MIPMAP_LINEAR:
break;
default:
paramBadEnum = true;
break;
}
break;
case LOCAL_GL_TEXTURE_MAG_FILTER:
switch (intParam) {
case LOCAL_GL_NEAREST:
case LOCAL_GL_LINEAR:
break;
default:
paramBadEnum = true;
break;
}
break;
case LOCAL_GL_TEXTURE_WRAP_S:
case LOCAL_GL_TEXTURE_WRAP_T:
case LOCAL_GL_TEXTURE_WRAP_R:
switch (intParam) {
case LOCAL_GL_CLAMP_TO_EDGE:
case LOCAL_GL_MIRRORED_REPEAT:
case LOCAL_GL_REPEAT:
break;
default:
paramBadEnum = true;
break;
}
break;
case LOCAL_GL_TEXTURE_MAX_ANISOTROPY_EXT:
if (maybeFloatParam && floatParam < 1.0f)
paramBadValue = true;
else if (maybeIntParam && intParam < 1)
paramBadValue = true;
break;
}
if (paramBadEnum) {
if (maybeIntParam) {
mContext->ErrorInvalidEnum("texParameteri: pname 0x%04x: Invalid param"
" 0x%04x.",
pname, intParam);
} else {
mContext->ErrorInvalidEnum("texParameterf: pname 0x%04x: Invalid param %g.",
pname, floatParam);
}
return;
}
if (paramBadValue) {
if (maybeIntParam) {
mContext->ErrorInvalidValue("texParameteri: pname 0x%04x: Invalid param %i"
" (0x%x).",
pname, intParam, intParam);
} else {
mContext->ErrorInvalidValue("texParameterf: pname 0x%04x: Invalid param %g.",
pname, floatParam);
}
return;
}
////////////////
// Store any needed values
switch (pname) {
case LOCAL_GL_TEXTURE_BASE_LEVEL:
mBaseMipmapLevel = intParam;
ClampLevelBaseAndMax();
break;
case LOCAL_GL_TEXTURE_MAX_LEVEL:
mMaxMipmapLevel = intParam;
ClampLevelBaseAndMax();
break;
case LOCAL_GL_TEXTURE_MIN_FILTER:
mMinFilter = intParam;
break;
case LOCAL_GL_TEXTURE_MAG_FILTER:
mMagFilter = intParam;
break;
case LOCAL_GL_TEXTURE_WRAP_S:
mWrapS = intParam;
break;
case LOCAL_GL_TEXTURE_WRAP_T:
mWrapT = intParam;
break;
// We don't actually need to store the WRAP_R, since it doesn't change texture
// completeness rules.
}
// Only a couple of pnames don't need to invalidate our resolve status cache.
switch (pname) {
case LOCAL_GL_TEXTURE_MAX_ANISOTROPY_EXT:
case LOCAL_GL_TEXTURE_WRAP_R:
break;
default:
InvalidateResolveCache();
break;
}
////////////////
mContext->MakeContextCurrent();
if (maybeIntParam)
mContext->gl->fTexParameteri(texTarget.get(), pname, intParam);
else
mContext->gl->fTexParameterf(texTarget.get(), pname, floatParam);
}
////////////////////////////////////////////////////////////////////////////////
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLTexture)
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLTexture, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLTexture, Release)
} // namespace mozilla
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