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Bug 814524 - Make WebGLContext::TexImage2D avoid readback for video elements, r=jgilbert

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This commit is contained in:
chiajung hung 2014-07-08 20:52:00 +02:00
parent 4a6fd62a30
commit 478539f783
7 changed files with 647 additions and 153 deletions
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62
content/canvas/src/WebGLContext.cpp
View File

@ -15,6 +15,7 @@
#include "WebGLVertexArray.h"
#include "WebGLQuery.h"
#include "GLBlitHelper.h"
#include "AccessCheck.h"
#include "nsIConsoleService.h"
#include "nsServiceManagerUtils.h"
@ -28,6 +29,7 @@
#include "nsIVariant.h"
#include "ImageEncoder.h"
#include "ImageContainer.h"
#include "gfxContext.h"
#include "gfxPattern.h"
@ -57,6 +59,7 @@
#include "mozilla/Services.h"
#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/HTMLVideoElement.h"
#include "mozilla/dom/ImageData.h"
#include "mozilla/ProcessPriorityManager.h"
#include "mozilla/EnumeratedArrayCycleCollection.h"
@ -1523,6 +1526,65 @@ WebGLContext::GetSurfaceSnapshot(bool* aPremultAlpha)
return dt->Snapshot();
}
bool WebGLContext::TexImageFromVideoElement(GLenum target, GLint level,
GLenum internalformat, GLenum format, GLenum type,
mozilla::dom::Element& elt)
{
HTMLVideoElement* video = HTMLVideoElement::FromContentOrNull(&elt);
if (!video) {
return false;
}
uint16_t readyState;
if (NS_SUCCEEDED(video->GetReadyState(&readyState)) &&
readyState < nsIDOMHTMLMediaElement::HAVE_CURRENT_DATA)
{
//No frame inside, just return
return false;
}
// If it doesn't have a principal, just bail
nsCOMPtr<nsIPrincipal> principal = video->GetCurrentPrincipal();
if (!principal) {
return false;
}
mozilla::layers::ImageContainer* container = video->GetImageContainer();
if (!container) {
return false;
}
if (video->GetCORSMode() == CORS_NONE) {
bool subsumes;
nsresult rv = mCanvasElement->NodePrincipal()->Subsumes(principal, &subsumes);
if (NS_FAILED(rv) || !subsumes) {
GenerateWarning("It is forbidden to load a WebGL texture from a cross-domain element that has not been validated with CORS. "
"See https://developer.mozilla.org/en/WebGL/Cross-Domain_Textures");
return false;
}
}
gl->MakeCurrent();
nsRefPtr<mozilla::layers::Image> srcImage = container->LockCurrentImage();
WebGLTexture* tex = activeBoundTextureForTarget(target);
const WebGLTexture::ImageInfo& info = tex->ImageInfoAt(target, 0);
bool dimensionsMatch = info.Width() == srcImage->GetSize().width &&
info.Height() == srcImage->GetSize().height;
if (!dimensionsMatch) {
// we need to allocation
gl->fTexImage2D(target, level, internalformat, srcImage->GetSize().width, srcImage->GetSize().height, 0, format, type, nullptr);
}
bool ok = gl->BlitHelper()->BlitImageToTexture(srcImage.get(), srcImage->GetSize(), tex->GLName(), target, mPixelStoreFlipY);
if (ok) {
tex->SetImageInfo(target, level, srcImage->GetSize().width, srcImage->GetSize().height, format, type, WebGLImageDataStatus::InitializedImageData);
tex->Bind(target);
}
srcImage = nullptr;
container->UnlockCurrentImage();
return ok;
}
//
// XPCOM goop
//

23
content/canvas/src/WebGLContext.h
View File

@ -80,6 +80,7 @@ class WebGLVertexArray;
namespace dom {
class ImageData;
class Element;
struct WebGLContextAttributes;
template<typename> struct Nullable;
@ -460,6 +461,10 @@ public:
dom::ImageData* pixels, ErrorResult& rv);
// Allow whatever element types the bindings are willing to pass
// us in TexImage2D
bool TexImageFromVideoElement(GLenum target, GLint level,
GLenum internalformat, GLenum format, GLenum type,
mozilla::dom::Element& image);
template<class ElementType>
void TexImage2D(GLenum target, GLint level,
GLenum internalformat, GLenum format, GLenum type,
@ -467,6 +472,17 @@ public:
{
if (IsContextLost())
return;
WebGLTexture* tex = activeBoundTextureForTarget(target);
if (!tex)
return ErrorInvalidOperation("no texture is bound to this target");
// Trying to handle the video by GPU directly first
if (TexImageFromVideoElement(target, level, internalformat, format, type, elt)) {
return;
}
RefPtr<gfx::DataSourceSurface> data;
WebGLTexelFormat srcFormat;
nsLayoutUtils::SurfaceFromElementResult res = SurfaceFromElement(elt);
@ -482,6 +498,7 @@ public:
0, format, type, data->GetData(), byteLength,
-1, srcFormat, mPixelStorePremultiplyAlpha);
}
void TexParameterf(GLenum target, GLenum pname, GLfloat param) {
TexParameter_base(target, pname, nullptr, &param);
}
@ -507,6 +524,12 @@ public:
{
if (IsContextLost())
return;
// Trying to handle the video by GPU directly first
if (TexImageFromVideoElement(target, level, format, format, type, elt)) {
return;
}
RefPtr<gfx::DataSourceSurface> data;
WebGLTexelFormat srcFormat;
nsLayoutUtils::SurfaceFromElementResult res = SurfaceFromElement(elt);

540
gfx/gl/GLBlitHelper.cpp
View File

@ -8,6 +8,16 @@
#include "GLContext.h"
#include "ScopedGLHelpers.h"
#include "mozilla/Preferences.h"
#include "ImageContainer.h"
#include "HeapCopyOfStackArray.h"
#ifdef MOZ_WIDGET_GONK
#include "GrallocImages.h"
#include "GLLibraryEGL.h"
#endif
using mozilla::layers::PlanarYCbCrImage;
using mozilla::layers::PlanarYCbCrData;
namespace mozilla {
namespace gl {
@ -31,14 +41,14 @@ RenderbufferStorageBySamples(GLContext* aGL, GLsizei aSamples,
GLuint
CreateTexture(GLContext* aGL, GLenum aInternalFormat, GLenum aFormat,
GLenum aType, const gfx::IntSize& aSize)
GLenum aType, const gfx::IntSize& aSize, bool linear)
{
GLuint tex = 0;
aGL->fGenTextures(1, &tex);
ScopedBindTexture autoTex(aGL, tex);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_LINEAR);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_LINEAR);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, linear ? LOCAL_GL_LINEAR : LOCAL_GL_NEAREST);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, linear ? LOCAL_GL_LINEAR : LOCAL_GL_NEAREST);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
aGL->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
@ -54,7 +64,6 @@ CreateTexture(GLContext* aGL, GLenum aInternalFormat, GLenum aFormat,
return tex;
}
GLuint
CreateTextureForOffscreen(GLContext* aGL, const GLFormats& aFormats,
const gfx::IntSize& aSize)
@ -129,79 +138,167 @@ GLBlitHelper::GLBlitHelper(GLContext* gl)
, mTex2DRectBlit_FragShader(0)
, mTex2DBlit_Program(0)
, mTex2DRectBlit_Program(0)
, mYFlipLoc(-1)
, mTexExternalBlit_FragShader(0)
, mTexYUVPlanarBlit_FragShader(0)
, mTexExternalBlit_Program(0)
, mTexYUVPlanarBlit_Program(0)
, mFBO(0)
, mSrcTexY(0)
, mSrcTexCb(0)
, mSrcTexCr(0)
, mSrcTexEGL(0)
, mYTexScaleLoc(-1)
, mCbCrTexScaleLoc(-1)
, mTexWidth(0)
, mTexHeight(0)
, mCurYScale(1.0f)
, mCurCbCrScale(1.0f)
{
}
GLBlitHelper::~GLBlitHelper()
{
DeleteTexBlitProgram();
GLuint tex[] = {
mSrcTexY,
mSrcTexCb,
mSrcTexCr,
mSrcTexEGL,
};
mSrcTexY = mSrcTexCb = mSrcTexCr = mSrcTexEGL = 0;
mGL->fDeleteTextures(ArrayLength(tex), tex);
if (mFBO) {
mGL->fDeleteFramebuffers(1, &mFBO);
}
mFBO = 0;
}
// Allowed to be destructive of state we restore in functions below.
bool
GLBlitHelper::InitTexQuadProgram(GLenum target)
GLBlitHelper::InitTexQuadProgram(BlitType target)
{
const char kTexBlit_VertShaderSource[] = "\
attribute vec2 aPosition; \n\
\n\
varying vec2 vTexCoord; \n\
\n\
void main(void) { \n\
vTexCoord = aPosition; \n\
vec2 vertPos = aPosition * 2.0 - 1.0; \n\
gl_Position = vec4(vertPos, 0.0, 1.0); \n\
} \n\
attribute vec2 aPosition; \n\
\n\
uniform float uYflip; \n\
varying vec2 vTexCoord; \n\
\n\
void main(void) \n\
{ \n\
vTexCoord = aPosition; \n\
vTexCoord.y = abs(vTexCoord.y - uYflip); \n\
vec2 vertPos = aPosition * 2.0 - 1.0; \n\
gl_Position = vec4(vertPos, 0.0, 1.0); \n\
} \n\
";
const char kTex2DBlit_FragShaderSource[] = "\
#ifdef GL_FRAGMENT_PRECISION_HIGH \n\
precision highp float; \n\
#else \n\
precision mediump float; \n\
#endif \n\
\n\
uniform sampler2D uTexUnit; \n\
\n\
varying vec2 vTexCoord; \n\
\n\
void main(void) { \n\
gl_FragColor = texture2D(uTexUnit, vTexCoord); \n\
} \n\
#ifdef GL_FRAGMENT_PRECISION_HIGH \n\
precision highp float; \n\
#else \n\
prevision mediump float; \n\
#endif \n\
uniform sampler2D uTexUnit; \n\
\n\
varying vec2 vTexCoord; \n\
\n\
void main(void) \n\
{ \n\
gl_FragColor = texture2D(uTexUnit, vTexCoord); \n\
} \n\
";
const char kTex2DRectBlit_FragShaderSource[] = "\
#ifdef GL_FRAGMENT_PRECISION_HIGH \n\
precision highp float; \n\
#else \n\
precision mediump float; \n\
#endif \n\
\n\
uniform sampler2D uTexUnit; \n\
uniform vec2 uTexCoordMult; \n\
\n\
varying vec2 vTexCoord; \n\
\n\
void main(void) { \n\
gl_FragColor = texture2DRect(uTexUnit, \n\
vTexCoord * uTexCoordMult); \n\
} \n\
#ifdef GL_FRAGMENT_PRECISION_HIGH \n\
precision highp float; \n\
#else \n\
precision mediump float; \n\
#endif \n\
\n\
uniform sampler2D uTexUnit; \n\
uniform vec2 uTexCoordMult; \n\
\n\
varying vec2 vTexCoord; \n\
\n\
void main(void) \n\
{ \n\
gl_FragColor = texture2DRect(uTexUnit, \n\
vTexCoord * uTexCoordMult); \n\
} \n\
";
#ifdef MOZ_WIDGET_GONK
const char kTexExternalBlit_FragShaderSource[] = "\
#extension GL_OES_EGL_image_external : require \n\
#ifdef GL_FRAGMENT_PRECISION_HIGH \n\
precision highp float; \n\
#else \n\
precision mediump float; \n\
#endif \n\
varying vec2 vTexCoord; \n\
uniform samplerExternalOES uTexUnit; \n\
\n\
void main() \n\
{ \n\
gl_FragColor = texture2D(uTexUnit, vTexCoord); \n\
} \n\
";
#endif
const char kTexYUVPlanarBlit_FragShaderSource[] = "\
varying vec2 vTexCoord; \n\
uniform sampler2D uYTexture; \n\
uniform sampler2D uCbTexture; \n\
uniform sampler2D uCrTexture; \n\
uniform vec2 uYTexScale; \n\
uniform vec2 uCbCrTexScale; \n\
void main() \n\
{ \n\
float y = texture2D(uYTexture, vTexCoord * uYTexScale).r; \n\
float cb = texture2D(uCbTexture, vTexCoord * uCbCrTexScale).r; \n\
float cr = texture2D(uCrTexture, vTexCoord * uCbCrTexScale).r; \n\
y = (y - 0.0625) * 1.164; \n\
cb = cb - 0.504; \n\
cr = cr - 0.5; \n\
gl_FragColor.r = floor((y + cr * 1.596) * 256.0)/256.0; \n\
gl_FragColor.g = floor((y - 0.813 * cr - 0.391 * cb) * 256.0)/256.0; \n\
gl_FragColor.b = floor((y + cb * 2.018) * 256.0) /256.0; \n\
gl_FragColor.a = 1.0; \n\
} \n\
";
MOZ_ASSERT(target == LOCAL_GL_TEXTURE_2D ||
target == LOCAL_GL_TEXTURE_RECTANGLE_ARB);
bool success = false;
GLuint *programPtr;
GLuint *fragShaderPtr;
const char* fragShaderSource;
if (target == LOCAL_GL_TEXTURE_2D) {
switch (target) {
case BlitTex2D:
programPtr = &mTex2DBlit_Program;
fragShaderPtr = &mTex2DBlit_FragShader;
fragShaderSource = kTex2DBlit_FragShaderSource;
} else {
break;
case BlitTexRect:
programPtr = &mTex2DRectBlit_Program;
fragShaderPtr = &mTex2DRectBlit_FragShader;
fragShaderSource = kTex2DRectBlit_FragShaderSource;
break;
#ifdef MOZ_WIDGET_GONK
case ConvertGralloc:
programPtr = &mTexExternalBlit_Program;
fragShaderPtr = &mTexExternalBlit_FragShader;
fragShaderSource = kTexExternalBlit_FragShaderSource;
break;
#endif
case ConvertPlanarYCbCr:
programPtr = &mTexYUVPlanarBlit_Program;
fragShaderPtr = &mTexYUVPlanarBlit_FragShader;
fragShaderSource = kTexYUVPlanarBlit_FragShaderSource;
break;
default:
return false;
}
GLuint& program = *programPtr;
@ -228,15 +325,14 @@ GLBlitHelper::InitTexQuadProgram(GLenum target)
0.0f, 1.0f,
1.0f, 1.0f
};
HeapCopyOfStackArray<GLfloat> vertsOnHeap(verts);
MOZ_ASSERT(!mTexBlit_Buffer);
mGL->fGenBuffers(1, &mTexBlit_Buffer);
mGL->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mTexBlit_Buffer);
const size_t vertsSize = sizeof(verts);
// Make sure we have a sane size.
MOZ_ASSERT(vertsSize >= 3 * sizeof(GLfloat));
mGL->fBufferData(LOCAL_GL_ARRAY_BUFFER, vertsSize, verts, LOCAL_GL_STATIC_DRAW);
mGL->fBufferData(LOCAL_GL_ARRAY_BUFFER, vertsOnHeap.ByteLength(), vertsOnHeap.Data(), LOCAL_GL_STATIC_DRAW);
}
if (!mTexBlit_VertShader) {
@ -319,20 +415,46 @@ GLBlitHelper::InitTexQuadProgram(GLenum target)
break;
}
MOZ_ASSERT(mGL->fGetAttribLocation(program, "aPosition") == 0);
GLint texUnitLoc = mGL->fGetUniformLocation(program, "uTexUnit");
MOZ_ASSERT(texUnitLoc != -1, "uniform not found");
// Set uniforms here:
// Cache and set attribute and uniform
mGL->fUseProgram(program);
mGL->fUniform1i(texUnitLoc, 0);
switch (target) {
case BlitTex2D:
case BlitTexRect:
case ConvertGralloc: {
#ifdef MOZ_WIDGET_GONK
GLint texUnitLoc = mGL->fGetUniformLocation(program, "uTexUnit");
MOZ_ASSERT(texUnitLoc != -1, "uniform uTexUnit not found");
mGL->fUniform1i(texUnitLoc, 0);
break;
#endif
}
case ConvertPlanarYCbCr: {
GLint texY = mGL->fGetUniformLocation(program, "uYTexture");
GLint texCb = mGL->fGetUniformLocation(program, "uCbTexture");
GLint texCr = mGL->fGetUniformLocation(program, "uCrTexture");
mYTexScaleLoc = mGL->fGetUniformLocation(program, "uYTexScale");
mCbCrTexScaleLoc= mGL->fGetUniformLocation(program, "uCbCrTexScale");
DebugOnly<bool> hasUniformLocations = texY != -1 &&
texCb != -1 &&
texCr != -1 &&
mYTexScaleLoc != -1 &&
mCbCrTexScaleLoc != -1;
MOZ_ASSERT(hasUniformLocations, "uniforms not found");
mGL->fUniform1i(texY, Channel_Y);
mGL->fUniform1i(texCb, Channel_Cb);
mGL->fUniform1i(texCr, Channel_Cr);
break;
}
}
MOZ_ASSERT(mGL->fGetAttribLocation(program, "aPosition") == 0);
mYFlipLoc = mGL->fGetUniformLocation(program, "uYflip");
MOZ_ASSERT(mYFlipLoc != -1, "uniform: uYflip not found");
success = true;
} while (false);
if (!success) {
NS_ERROR("Creating program for texture blit failed!");
// Clean up:
DeleteTexBlitProgram();
return false;
@ -351,13 +473,13 @@ GLBlitHelper::InitTexQuadProgram(GLenum target)
}
bool
GLBlitHelper::UseTexQuadProgram(GLenum target, const gfx::IntSize& srcSize)
GLBlitHelper::UseTexQuadProgram(BlitType target, const gfx::IntSize& srcSize)
{
if (!InitTexQuadProgram(target)) {
return false;
}
if (target == LOCAL_GL_TEXTURE_RECTANGLE_ARB) {
if (target == BlitTexRect) {
GLint texCoordMultLoc = mGL->fGetUniformLocation(mTex2DRectBlit_Program, "uTexCoordMult");
MOZ_ASSERT(texCoordMultLoc != -1, "uniform not found");
mGL->fUniform2f(texCoordMultLoc, srcSize.width, srcSize.height);
@ -393,6 +515,22 @@ GLBlitHelper::DeleteTexBlitProgram()
mGL->fDeleteProgram(mTex2DRectBlit_Program);
mTex2DRectBlit_Program = 0;
}
if (mTexExternalBlit_FragShader) {
mGL->fDeleteShader(mTexExternalBlit_FragShader);
mTexExternalBlit_FragShader = 0;
}
if (mTexYUVPlanarBlit_FragShader) {
mGL->fDeleteShader(mTexYUVPlanarBlit_FragShader);
mTexYUVPlanarBlit_FragShader = 0;
}
if (mTexExternalBlit_Program) {
mGL->fDeleteProgram(mTexExternalBlit_Program);
mTexExternalBlit_Program = 0;
}
if (mTexYUVPlanarBlit_Program) {
mGL->fDeleteProgram(mTexYUVPlanarBlit_Program);
mTexYUVPlanarBlit_Program = 0;
}
}
void
@ -441,6 +579,182 @@ GLBlitHelper::BlitFramebufferToFramebuffer(GLuint srcFB, GLuint destFB,
mGL->fDeleteTextures(1, &tex);
}
void
GLBlitHelper::BindAndUploadYUVTexture(Channel which, uint32_t width, uint32_t height, void* data, bool needsAllocation)
{
MOZ_ASSERT(which < Channel_Max, "Invalid channel!");
GLuint* srcTexArr[3] = {&mSrcTexY, &mSrcTexCb, &mSrcTexCr};
GLuint& tex = *srcTexArr[which];
if (!tex) {
MOZ_ASSERT(needsAllocation);
tex = CreateTexture(mGL, LOCAL_GL_LUMINANCE, LOCAL_GL_LUMINANCE, LOCAL_GL_UNSIGNED_BYTE,
gfx::IntSize(width, height), false);
}
mGL->fActiveTexture(LOCAL_GL_TEXTURE0 + which);
mGL->fBindTexture(LOCAL_GL_TEXTURE_2D, tex);
if (!needsAllocation) {
mGL->fTexSubImage2D(LOCAL_GL_TEXTURE_2D,
0,
0,
0,
width,
height,
LOCAL_GL_LUMINANCE,
LOCAL_GL_UNSIGNED_BYTE,
data);
} else {
mGL->fTexImage2D(LOCAL_GL_TEXTURE_2D,
0,
LOCAL_GL_LUMINANCE,
width,
height,
0,
LOCAL_GL_LUMINANCE,
LOCAL_GL_UNSIGNED_BYTE,
data);
}
}
#ifdef MOZ_WIDGET_GONK
void
GLBlitHelper::BindAndUploadExternalTexture(EGLImage image) {
MOZ_ASSERT(image != EGL_NO_IMAGE, "Bad EGLImage");
if (!mSrcTexEGL) {
mGL->fGenTextures(1, &mSrcTexEGL);
mGL->fBindTexture(LOCAL_GL_TEXTURE_EXTERNAL_OES, mSrcTexEGL);
mGL->fTexParameteri(LOCAL_GL_TEXTURE_EXTERNAL_OES, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
mGL->fTexParameteri(LOCAL_GL_TEXTURE_EXTERNAL_OES, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
mGL->fTexParameteri(LOCAL_GL_TEXTURE_EXTERNAL_OES, LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_NEAREST);
mGL->fTexParameteri(LOCAL_GL_TEXTURE_EXTERNAL_OES, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_NEAREST);
} else {
mGL->fBindTexture(LOCAL_GL_TEXTURE_EXTERNAL_OES, mSrcTexEGL);
}
mGL->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_EXTERNAL_OES, image);
}
bool
GLBlitHelper::BlitGrallocImage(layers::GrallocImage* grallocImage, bool yFlip) {
ScopedBindTextureUnit boundTU(mGL, LOCAL_GL_TEXTURE0);
mGL->fClear(LOCAL_GL_COLOR_BUFFER_BIT);
EGLint attrs[] = {
LOCAL_EGL_IMAGE_PRESERVED, LOCAL_EGL_TRUE,
LOCAL_EGL_NONE, LOCAL_EGL_NONE
};
EGLImage image = sEGLLibrary.fCreateImage(sEGLLibrary.Display(),
EGL_NO_CONTEXT,
LOCAL_EGL_NATIVE_BUFFER_ANDROID,
grallocImage->GetNativeBuffer(), attrs);
if (image == EGL_NO_IMAGE)
return false;
int oldBinding = 0;
mGL->fGetIntegerv(LOCAL_GL_TEXTURE_BINDING_EXTERNAL_OES, &oldBinding);
BindAndUploadExternalTexture(image);
mGL->fUniform1f(mYFlipLoc, yFlip ? (float)1.0f : (float)0.0f);
mGL->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
sEGLLibrary.fDestroyImage(sEGLLibrary.Display(), image);
mGL->fBindTexture(LOCAL_GL_TEXTURE_EXTERNAL_OES, oldBinding);
return true;
}
#endif
bool
GLBlitHelper::BlitPlanarYCbCrImage(layers::PlanarYCbCrImage* yuvImage, bool yFlip)
{
ScopedBindTextureUnit boundTU(mGL, LOCAL_GL_TEXTURE0);
const PlanarYCbCrData* yuvData = yuvImage->GetData();
bool needsAllocation = false;
if (mTexWidth != yuvData->mYStride || mTexHeight != yuvData->mYSize.height) {
mTexWidth = yuvData->mYStride;
mTexHeight = yuvData->mYSize.height;
needsAllocation = true;
}
GLint oldTex[3];
for (int i = 0; i < 3; i++) {
mGL->fActiveTexture(LOCAL_GL_TEXTURE0 + i);
mGL->fGetIntegerv(LOCAL_GL_TEXTURE_BINDING_2D, &oldTex[i]);
}
BindAndUploadYUVTexture(Channel_Y, yuvData->mYStride, yuvData->mYSize.height, yuvData->mYChannel, needsAllocation);
BindAndUploadYUVTexture(Channel_Cb, yuvData->mCbCrStride, yuvData->mCbCrSize.height, yuvData->mCbChannel, needsAllocation);
BindAndUploadYUVTexture(Channel_Cr, yuvData->mCbCrStride, yuvData->mCbCrSize.height, yuvData->mCrChannel, needsAllocation);
mGL->fUniform1f(mYFlipLoc, yFlip ? (float)1.0 : (float)0.0);
if (needsAllocation) {
mGL->fUniform2f(mYTexScaleLoc, (float)yuvData->mYSize.width/yuvData->mYStride, 1.0f);
mGL->fUniform2f(mCbCrTexScaleLoc, (float)yuvData->mCbCrSize.width/yuvData->mCbCrStride, 1.0f);
}
mGL->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
for (int i = 0; i < 3; i++) {
mGL->fActiveTexture(LOCAL_GL_TEXTURE0 + i);
mGL->fBindTexture(LOCAL_GL_TEXTURE_2D, oldTex[i]);
}
return true;
}
bool
GLBlitHelper::BlitImageToTexture(layers::Image* srcImage, const gfx::IntSize& destSize, GLuint destTex, GLenum destTarget, bool yFlip, GLuint xoffset, GLuint yoffset, GLuint cropWidth, GLuint cropHeight)
{
ScopedGLDrawState autoStates(mGL);
BlitType type;
switch (srcImage->GetFormat())
{
case ImageFormat::PLANAR_YCBCR:
type = ConvertPlanarYCbCr;
break;
case ImageFormat::GRALLOC_PLANAR_YCBCR:
#ifdef MOZ_WIDGET_GONK
type = ConvertGralloc;
break;
#endif
default:
return false;
}
bool init = InitTexQuadProgram(type);
if (!init) {
return false;
}
if (!mFBO) {
mGL->fGenFramebuffers(1, &mFBO);
}
ScopedBindFramebuffer boundFB(mGL, mFBO);
mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_COLOR_ATTACHMENT0, destTarget, destTex, 0);
mGL->fColorMask(LOCAL_GL_TRUE, LOCAL_GL_TRUE, LOCAL_GL_TRUE, LOCAL_GL_TRUE);
mGL->fViewport(0, 0, destSize.width, destSize.height);
if (xoffset != 0 && yoffset != 0 && cropWidth != 0 && cropHeight != 0) {
mGL->fEnable(LOCAL_GL_SCISSOR_TEST);
mGL->fScissor(xoffset, yoffset, (GLsizei)cropWidth, (GLsizei)cropHeight);
}
#ifdef MOZ_WIDGET_GONK
if (type == ConvertGralloc) {
layers::GrallocImage* grallocImage = static_cast<layers::GrallocImage*>(srcImage);
return BlitGrallocImage(grallocImage, yFlip);
}
#endif
if (type == ConvertPlanarYCbCr) {
mGL->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, 1);
PlanarYCbCrImage* yuvImage = static_cast<PlanarYCbCrImage*>(srcImage);
return BlitPlanarYCbCrImage(yuvImage, yFlip);
}
return false;
}
void
GLBlitHelper::BlitTextureToFramebuffer(GLuint srcTex, GLuint destFB,
const gfx::IntSize& srcSize,
@ -459,106 +773,32 @@ GLBlitHelper::BlitTextureToFramebuffer(GLuint srcTex, GLuint destFB,
return;
}
BlitType type;
switch (srcTarget)
{
case LOCAL_GL_TEXTURE_2D:
type = BlitTex2D;
break;
case LOCAL_GL_TEXTURE_RECTANGLE_ARB:
type = BlitTexRect;
break;
default:
printf_stderr("Fatal Error: Failed to prepare to blit texture->framebuffer.\n");
MOZ_CRASH();
break;
}
ScopedBindFramebuffer boundFB(mGL, destFB);
// UseTexQuadProgram initializes a shader that reads
// from texture unit 0.
ScopedBindTextureUnit boundTU(mGL, LOCAL_GL_TEXTURE0);
ScopedBindTexture boundTex(mGL, srcTex, srcTarget);
GLuint boundProgram = 0;
mGL->GetUIntegerv(LOCAL_GL_CURRENT_PROGRAM, &boundProgram);
GLuint boundBuffer = 0;
mGL->GetUIntegerv(LOCAL_GL_ARRAY_BUFFER_BINDING, &boundBuffer);
/*
* mGL->fGetVertexAttribiv takes:
* VERTEX_ATTRIB_ARRAY_ENABLED
* VERTEX_ATTRIB_ARRAY_SIZE,
* VERTEX_ATTRIB_ARRAY_STRIDE,
* VERTEX_ATTRIB_ARRAY_TYPE,
* VERTEX_ATTRIB_ARRAY_NORMALIZED,
* VERTEX_ATTRIB_ARRAY_BUFFER_BINDING,
* CURRENT_VERTEX_ATTRIB
*
* CURRENT_VERTEX_ATTRIB is vertex shader state. \o/
* Others appear to be vertex array state,
* or alternatively in the internal vertex array state
* for a buffer object.
*/
GLint attrib0_enabled = 0;
GLint attrib0_size = 0;
GLint attrib0_stride = 0;
GLint attrib0_type = 0;
GLint attrib0_normalized = 0;
GLint attrib0_bufferBinding = 0;
void* attrib0_pointer = nullptr;
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_ENABLED, &attrib0_enabled);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_SIZE, &attrib0_size);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_STRIDE, &attrib0_stride);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_TYPE, &attrib0_type);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, &attrib0_normalized);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, &attrib0_bufferBinding);
mGL->fGetVertexAttribPointerv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_POINTER, &attrib0_pointer);
// Note that uniform values are program state, so we don't need to rebind those.
ScopedGLState blend (mGL, LOCAL_GL_BLEND, false);
ScopedGLState cullFace (mGL, LOCAL_GL_CULL_FACE, false);
ScopedGLState depthTest (mGL, LOCAL_GL_DEPTH_TEST, false);
ScopedGLState dither (mGL, LOCAL_GL_DITHER, false);
ScopedGLState polyOffsFill(mGL, LOCAL_GL_POLYGON_OFFSET_FILL, false);
ScopedGLState sampleAToC (mGL, LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE, false);
ScopedGLState sampleCover (mGL, LOCAL_GL_SAMPLE_COVERAGE, false);
ScopedGLState scissor (mGL, LOCAL_GL_SCISSOR_TEST, false);
ScopedGLState stencil (mGL, LOCAL_GL_STENCIL_TEST, false);
realGLboolean colorMask[4];
mGL->fGetBooleanv(LOCAL_GL_COLOR_WRITEMASK, colorMask);
mGL->fColorMask(LOCAL_GL_TRUE,
LOCAL_GL_TRUE,
LOCAL_GL_TRUE,
LOCAL_GL_TRUE);
GLint viewport[4];
mGL->fGetIntegerv(LOCAL_GL_VIEWPORT, viewport);
mGL->fViewport(0, 0, destSize.width, destSize.height);
ScopedGLDrawState autoStates(mGL);
// Does destructive things to (only!) what we just saved above.
bool good = UseTexQuadProgram(srcTarget, srcSize);
bool good = UseTexQuadProgram(type, srcSize);
if (!good) {
// We're up against the wall, so bail.
// This should really be MOZ_CRASH(why) or MOZ_RUNTIME_ASSERT(good).
printf_stderr("[%s:%d] Fatal Error: Failed to prepare to blit texture->framebuffer.\n",
__FILE__, __LINE__);
printf_stderr("[%s:%d] Fatal Error: Failed to prepare to blit texture->framebuffer.\n");
MOZ_CRASH();
}
mGL->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
mGL->fViewport(viewport[0], viewport[1],
viewport[2], viewport[3]);
mGL->fColorMask(colorMask[0],
colorMask[1],
colorMask[2],
colorMask[3]);
if (attrib0_enabled)
mGL->fEnableVertexAttribArray(0);
mGL->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, attrib0_bufferBinding);
mGL->fVertexAttribPointer(0,
attrib0_size,
attrib0_type,
attrib0_normalized,
attrib0_stride,
attrib0_pointer);
mGL->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, boundBuffer);
mGL->fUseProgram(boundProgram);
}
void

72
gfx/gl/GLBlitHelper.h
View File

@ -14,6 +14,13 @@
#include "mozilla/gfx/Point.h"
namespace mozilla {
namespace layers {
class Image;
class PlanarYCbCrImage;
class GrallocImage;
}
namespace gl {
class GLContext;
@ -38,7 +45,7 @@ GLuint CreateTextureForOffscreen(GLContext* aGL, const GLFormats& aFormats,
* GL_TEXTURE_WRAP_T = GL_CLAMP_TO_EDGE
*/
GLuint CreateTexture(GLContext* aGL, GLenum aInternalFormat, GLenum aFormat,
GLenum aType, const gfx::IntSize& aSize);
GLenum aType, const gfx::IntSize& aSize, bool linear = true);
/**
* Helper function to create, potentially, multisample render buffers suitable
@ -63,6 +70,34 @@ void CreateRenderbuffersForOffscreen(GLContext* aGL, const GLFormats& aFormats,
/** Buffer blitting helper */
class GLBlitHelper MOZ_FINAL
{
enum Channel
{
Channel_Y = 0,
Channel_Cb,
Channel_Cr,
Channel_Max,
};
/**
* BlitTex2D is used to copy blit the content of a GL_TEXTURE_2D object,
* BlitTexRect is used to copy blit the content of a GL_TEXTURE_RECT object,
* The difference between BlitTex2D and BlitTexRect is the texture type, which affect
* the fragment shader a bit.
*
* ConvertGralloc is used to color convert copy blit the GrallocImage into a
* normal RGB texture by egl_image_external extension
* ConvertPlnarYcbCr is used to color convert copy blit the PlanarYCbCrImage
* into a normal RGB texture by create textures of each color channel, and
* convert it in GPU.
* Convert type is created for canvas.
*/
enum BlitType
{
BlitTex2D,
BlitTexRect,
ConvertGralloc,
ConvertPlanarYCbCr,
};
// The GLContext is the sole owner of the GLBlitHelper.
GLContext* mGL;
@ -73,12 +108,40 @@ class GLBlitHelper MOZ_FINAL
GLuint mTex2DBlit_Program;
GLuint mTex2DRectBlit_Program;
GLint mYFlipLoc;
// Data for image blit path
GLuint mTexExternalBlit_FragShader;
GLuint mTexYUVPlanarBlit_FragShader;
GLuint mTexExternalBlit_Program;
GLuint mTexYUVPlanarBlit_Program;
GLuint mFBO;
GLuint mSrcTexY;
GLuint mSrcTexCb;
GLuint mSrcTexCr;
GLuint mSrcTexEGL;
GLint mYTexScaleLoc;
GLint mCbCrTexScaleLoc;
int mTexWidth;
int mTexHeight;
// Cache some uniform values
float mCurYScale;
float mCurCbCrScale;
void UseBlitProgram();
void SetBlitFramebufferForDestTexture(GLuint aTexture);
bool UseTexQuadProgram(GLenum target, const gfx::IntSize& srcSize);
bool InitTexQuadProgram(GLenum target = LOCAL_GL_TEXTURE_2D);
bool UseTexQuadProgram(BlitType target, const gfx::IntSize& srcSize);
bool InitTexQuadProgram(BlitType target = BlitTex2D);
void DeleteTexBlitProgram();
void BindAndUploadYUVTexture(Channel which, uint32_t width, uint32_t height, void* data, bool allocation);
#ifdef MOZ_WIDGET_GONK
void BindAndUploadExternalTexture(EGLImage image);
bool BlitGrallocImage(layers::GrallocImage* grallocImage, bool yFlip = false);
#endif
bool BlitPlanarYCbCrImage(layers::PlanarYCbCrImage* yuvImage, bool yFlip = false);
public:
@ -108,6 +171,9 @@ public:
const gfx::IntSize& destSize,
GLenum srcTarget = LOCAL_GL_TEXTURE_2D,
GLenum destTarget = LOCAL_GL_TEXTURE_2D);
bool BlitImageToTexture(layers::Image* srcImage, const gfx::IntSize& destSize,
GLuint destTex, GLenum destTarget, bool yFlip = false, GLuint xoffset = 0,
GLuint yoffset = 0, GLuint width = 0, GLuint height = 0);
};
}

70
gfx/gl/ScopedGLHelpers.cpp
View File

@ -411,5 +411,75 @@ ScopedVertexAttribPointer::UnwrapImpl()
mGL->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mBoundBuffer);
}
ScopedGLDrawState::ScopedGLDrawState(GLContext* aGL)
: blend (aGL, LOCAL_GL_BLEND, false)
, cullFace (aGL, LOCAL_GL_CULL_FACE, false)
, depthTest (aGL, LOCAL_GL_DEPTH_TEST, false)
, dither (aGL, LOCAL_GL_DITHER, false)
, polyOffsFill(aGL, LOCAL_GL_POLYGON_OFFSET_FILL, false)
, sampleAToC (aGL, LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE, false)
, sampleCover (aGL, LOCAL_GL_SAMPLE_COVERAGE, false)
, scissor (aGL, LOCAL_GL_SCISSOR_TEST, false)
, stencil (aGL, LOCAL_GL_STENCIL_TEST, false)
, mGL(aGL)
, packAlign(4)
{
mGL->GetUIntegerv(LOCAL_GL_UNPACK_ALIGNMENT, &packAlign);
mGL->GetUIntegerv(LOCAL_GL_CURRENT_PROGRAM, &boundProgram);
mGL->GetUIntegerv(LOCAL_GL_ARRAY_BUFFER_BINDING, &boundBuffer);
mGL->GetUIntegerv(LOCAL_GL_MAX_VERTEX_ATTRIBS, &maxAttrib);
attrib_enabled = new GLint[maxAttrib];
for (unsigned int i = 0; i < maxAttrib; i++) {
mGL->fGetVertexAttribiv(i, LOCAL_GL_VERTEX_ATTRIB_ARRAY_ENABLED, &attrib_enabled[i]);
mGL->fDisableVertexAttribArray(i);
}
// Only Attrib0's client side state affected
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_SIZE, &attrib0_size);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_STRIDE, &attrib0_stride);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_TYPE, &attrib0_type);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, &attrib0_normalized);
mGL->fGetVertexAttribiv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, &attrib0_bufferBinding);
mGL->fGetVertexAttribPointerv(0, LOCAL_GL_VERTEX_ATTRIB_ARRAY_POINTER, &attrib0_pointer);
mGL->fGetBooleanv(LOCAL_GL_COLOR_WRITEMASK, colorMask);
mGL->fGetIntegerv(LOCAL_GL_VIEWPORT, viewport);
mGL->fGetIntegerv(LOCAL_GL_SCISSOR_BOX, scissorBox);
}
ScopedGLDrawState::~ScopedGLDrawState()
{
mGL->fScissor(scissorBox[0], scissorBox[1],
scissorBox[2], scissorBox[3]);
mGL->fViewport(viewport[0], viewport[1],
viewport[2], viewport[3]);
mGL->fColorMask(colorMask[0],
colorMask[1],
colorMask[2],
colorMask[3]);
mGL->fPixelStorei(LOCAL_GL_UNPACK_ALIGNMENT, packAlign);
for (unsigned int i = 0; i < maxAttrib; i++) {
if (attrib_enabled[i])
mGL->fEnableVertexAttribArray(i);
else
mGL->fDisableVertexAttribArray(i);
}
mGL->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, attrib0_bufferBinding);
mGL->fVertexAttribPointer(0,
attrib0_size,
attrib0_type,
attrib0_normalized,
attrib0_stride,
attrib0_pointer);
mGL->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, boundBuffer);
mGL->fUseProgram(boundProgram);
}
} /* namespace gl */
} /* namespace mozilla */

32
gfx/gl/ScopedGLHelpers.h
View File

@ -304,6 +304,38 @@ protected:
void UnwrapImpl();
};
struct ScopedGLDrawState {
ScopedGLDrawState(GLContext* gl);
~ScopedGLDrawState();
GLuint boundProgram;
GLuint boundBuffer;
ScopedGLState blend;
ScopedGLState cullFace;
ScopedGLState depthTest;
ScopedGLState dither;
ScopedGLState polyOffsFill;
ScopedGLState sampleAToC;
ScopedGLState sampleCover;
ScopedGLState scissor;
ScopedGLState stencil;
GLuint maxAttrib;
ScopedDeleteArray<GLint> attrib_enabled;
GLint attrib0_size;
GLint attrib0_stride;
GLint attrib0_type;
GLint attrib0_normalized;
GLint attrib0_bufferBinding;
void* attrib0_pointer;
realGLboolean colorMask[4];
GLint viewport[4];
GLint scissorBox[4];
GLContext* const mGL;
GLuint packAlign;
};
} /* namespace gl */
} /* namespace mozilla */

1
gfx/gl/moz.build
View File

@ -29,6 +29,7 @@ EXPORTS += [
'DecomposeIntoNoRepeatTriangles.h',
'ForceDiscreteGPUHelperCGL.h',
'GfxTexturesReporter.h',
'GLBlitHelper.h',
'GLBlitTextureImageHelper.h',
'GLConsts.h',
'GLContext.h',