bool
GLLibraryEGL::ReadbackEGLImage(EGLImage image, gfx::DataSourceSurface* out_surface)
{
StaticMutexAutoUnlock lock(sMutex);
if (!mReadbackGL) {
nsCString discardFailureId;
mReadbackGL = gl::GLContextProvider::CreateHeadless(gl::CreateContextFlags::NONE,
&discardFailureId);
}
ScopedTexture destTex(mReadbackGL);
const GLuint target = mReadbackGL->GetPreferredEGLImageTextureTarget();
ScopedBindTexture autoTex(mReadbackGL, destTex.Texture(), target);
mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_NEAREST);
mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_NEAREST);
mReadbackGL->fEGLImageTargetTexture2D(target, image);
ShaderConfigOGL config = ShaderConfigFromTargetAndFormat(target,
out_surface->GetFormat());
int shaderConfig = config.mFeatures;
mReadbackGL->ReadTexImageHelper()->ReadTexImage(out_surface, 0, target,
out_surface->GetSize(), shaderConfig);
return true;
}
GLuint
SharedSurface_EGLImage::AcquireConsumerTexture(GLContext* consGL)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(!mCurConsGL || consGL == mCurConsGL);
if (mPipeFailed)
return 0;
if (mPipeActive) {
MOZ_ASSERT(mConsTex);
return mConsTex;
}
if (!mConsTex) {
consGL->fGenTextures(1, &mConsTex);
ScopedBindTexture autoTex(consGL, mConsTex);
consGL->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_2D, mImage);
mPipeComplete = true;
mCurConsGL = consGL;
mGarbageBin = consGL->TexGarbageBin();
}
MOZ_ASSERT(consGL == mCurConsGL);
return 0;
}
void
GLBlitHelper::BlitFramebufferToTexture(GLuint srcFB, GLuint destTex,
const gfxIntSize& srcSize,
const gfxIntSize& destSize,
GLenum destTarget)
{
MOZ_ASSERT(!srcFB || mGL->fIsFramebuffer(srcFB));
MOZ_ASSERT(mGL->fIsTexture(destTex));
if (mGL->IsSupported(GLFeature::framebuffer_blit)) {
ScopedFramebufferForTexture destWrapper(mGL, destTex, destTarget);
BlitFramebufferToFramebuffer(srcFB, destWrapper.FB(),
srcSize, destSize);
return;
}
ScopedBindTexture autoTex(mGL, destTex, destTarget);
ScopedBindFramebuffer boundFB(mGL, srcFB);
ScopedGLState scissor(mGL, LOCAL_GL_SCISSOR_TEST, false);
mGL->fCopyTexSubImage2D(destTarget, 0,
0, 0,
0, 0,
srcSize.width, srcSize.height);
}
void
SharedSurface_EGLImage::AcquireConsumerTexture(GLContext* consGL, GLuint* out_texture, GLuint* out_target)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(!mCurConsGL || consGL == mCurConsGL);
if (!mConsTex) {
consGL->fGenTextures(1, &mConsTex);
MOZ_ASSERT(mConsTex);
ScopedBindTexture autoTex(consGL, mConsTex, LOCAL_GL_TEXTURE_EXTERNAL);
consGL->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_EXTERNAL, mImage);
mCurConsGL = consGL;
mGarbageBin = consGL->TexGarbageBin();
}
MOZ_ASSERT(consGL == mCurConsGL);
*out_texture = mConsTex;
*out_target = LOCAL_GL_TEXTURE_EXTERNAL;
}
void
GLBlitTextureImageHelper::BlitTextureImage(TextureImage *aSrc, const nsIntRect& aSrcRect,
TextureImage *aDst, const nsIntRect& aDstRect)
{
GLContext *gl = mCompositor->gl();
NS_ASSERTION(!aSrc->InUpdate(), "Source texture is in update!");
NS_ASSERTION(!aDst->InUpdate(), "Destination texture is in update!");
if (!aSrc || !aDst || aSrcRect.IsEmpty() || aDstRect.IsEmpty())
return;
int savedFb = 0;
gl->fGetIntegerv(LOCAL_GL_FRAMEBUFFER_BINDING, &savedFb);
ScopedGLState scopedScissorTestState(gl, LOCAL_GL_SCISSOR_TEST, false);
ScopedGLState scopedBlendState(gl, LOCAL_GL_BLEND, false);
// 2.0 means scale up by two
float blitScaleX = float(aDstRect.width) / float(aSrcRect.width);
float blitScaleY = float(aDstRect.height) / float(aSrcRect.height);
// We start iterating over all destination tiles
aDst->BeginBigImageIteration();
do {
// calculate portion of the tile that is going to be painted to
nsIntRect dstSubRect;
nsIntRect dstTextureRect = ThebesIntRect(aDst->GetTileRect());
dstSubRect.IntersectRect(aDstRect, dstTextureRect);
// this tile is not part of the destination rectangle aDstRect
if (dstSubRect.IsEmpty())
continue;
// (*) transform the rect of this tile into the rectangle defined by aSrcRect...
nsIntRect dstInSrcRect(dstSubRect);
dstInSrcRect.MoveBy(-aDstRect.TopLeft());
// ...which might be of different size, hence scale accordingly
dstInSrcRect.ScaleRoundOut(1.0f / blitScaleX, 1.0f / blitScaleY);
dstInSrcRect.MoveBy(aSrcRect.TopLeft());
SetBlitFramebufferForDestTexture(aDst->GetTextureID());
UseBlitProgram();
aSrc->BeginBigImageIteration();
// now iterate over all tiles in the source Image...
do {
// calculate portion of the source tile that is in the source rect
nsIntRect srcSubRect;
nsIntRect srcTextureRect = ThebesIntRect(aSrc->GetTileRect());
srcSubRect.IntersectRect(aSrcRect, srcTextureRect);
// this tile is not part of the source rect
if (srcSubRect.IsEmpty()) {
continue;
}
// calculate intersection of source rect with destination rect
srcSubRect.IntersectRect(srcSubRect, dstInSrcRect);
// this tile does not overlap the current destination tile
if (srcSubRect.IsEmpty()) {
continue;
}
// We now have the intersection of
// the current source tile
// and the desired source rectangle
// and the destination tile
// and the desired destination rectange
// in destination space.
// We need to transform this back into destination space, inverting the transform from (*)
nsIntRect srcSubInDstRect(srcSubRect);
srcSubInDstRect.MoveBy(-aSrcRect.TopLeft());
srcSubInDstRect.ScaleRoundOut(blitScaleX, blitScaleY);
srcSubInDstRect.MoveBy(aDstRect.TopLeft());
// we transform these rectangles to be relative to the current src and dst tiles, respectively
nsIntSize srcSize = srcTextureRect.Size();
nsIntSize dstSize = dstTextureRect.Size();
srcSubRect.MoveBy(-srcTextureRect.x, -srcTextureRect.y);
srcSubInDstRect.MoveBy(-dstTextureRect.x, -dstTextureRect.y);
float dx0 = 2.0f * float(srcSubInDstRect.x) / float(dstSize.width) - 1.0f;
float dy0 = 2.0f * float(srcSubInDstRect.y) / float(dstSize.height) - 1.0f;
float dx1 = 2.0f * float(srcSubInDstRect.x + srcSubInDstRect.width) / float(dstSize.width) - 1.0f;
float dy1 = 2.0f * float(srcSubInDstRect.y + srcSubInDstRect.height) / float(dstSize.height) - 1.0f;
ScopedViewportRect autoViewportRect(gl, 0, 0, dstSize.width, dstSize.height);
RectTriangles rects;
nsIntSize realTexSize = srcSize;
if (!CanUploadNonPowerOfTwo(gl)) {
realTexSize = nsIntSize(gfx::NextPowerOfTwo(srcSize.width),
gfx::NextPowerOfTwo(srcSize.height));
}
if (aSrc->GetWrapMode() == LOCAL_GL_REPEAT) {
rects.addRect(/* dest rectangle */
dx0, dy0, dx1, dy1,
/* tex coords */
srcSubRect.x / float(realTexSize.width),
srcSubRect.y / float(realTexSize.height),
srcSubRect.XMost() / float(realTexSize.width),
srcSubRect.YMost() / float(realTexSize.height));
} else {
DecomposeIntoNoRepeatTriangles(srcSubRect, realTexSize, rects);
// now put the coords into the d[xy]0 .. d[xy]1 coordinate space
// from the 0..1 that it comes out of decompose
InfallibleTArray<RectTriangles::coord>& coords = rects.vertCoords();
for (unsigned int i = 0; i < coords.Length(); ++i) {
coords[i].x = (coords[i].x * (dx1 - dx0)) + dx0;
coords[i].y = (coords[i].y * (dy1 - dy0)) + dy0;
}
}
ScopedBindTextureUnit autoTexUnit(gl, LOCAL_GL_TEXTURE0);
ScopedBindTexture autoTex(gl, aSrc->GetTextureID());
ScopedVertexAttribPointer autoAttrib0(gl, 0, 2, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0, rects.vertCoords().Elements());
ScopedVertexAttribPointer autoAttrib1(gl, 1, 2, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0, rects.texCoords().Elements());
gl->fDrawArrays(LOCAL_GL_TRIANGLES, 0, rects.elements());
} while (aSrc->NextTile());
} while (aDst->NextTile());
// unbind the previous texture from the framebuffer
SetBlitFramebufferForDestTexture(0);
gl->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, savedFb);
}
ScopedReadbackFB::ScopedReadbackFB(SharedSurface* src)
: mGL(src->mGL)
, mAutoFB(mGL)
, mTempFB(0)
, mTempTex(0)
, mSurfToUnlock(nullptr)
, mSurfToLock(nullptr)
{
switch (src->mAttachType) {
case AttachmentType::GLRenderbuffer:
{
mGL->fGenFramebuffers(1, &mTempFB);
mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mTempFB);
GLuint rb = src->ProdRenderbuffer();
mGL->fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
LOCAL_GL_RENDERBUFFER, rb);
break;
}
case AttachmentType::GLTexture:
{
mGL->fGenFramebuffers(1, &mTempFB);
mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mTempFB);
GLuint tex = src->ProdTexture();
GLenum texImageTarget = src->ProdTextureTarget();
mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
texImageTarget, tex, 0);
break;
}
case AttachmentType::Screen:
{
SharedSurface* origLocked = mGL->GetLockedSurface();
if (origLocked != src) {
if (origLocked) {
mSurfToLock = origLocked;
mSurfToLock->UnlockProd();
}
mSurfToUnlock = src;
mSurfToUnlock->LockProd();
}
// TODO: This should just be BindFB, but we don't have
// the patch for this yet. (bug 1045955)
MOZ_ASSERT(mGL->Screen());
mGL->Screen()->BindReadFB_Internal(0);
break;
}
default:
MOZ_CRASH("Unhandled `mAttachType`.");
}
if (src->NeedsIndirectReads()) {
mGL->fGenTextures(1, &mTempTex);
{
ScopedBindTexture autoTex(mGL, mTempTex);
GLenum format = src->mHasAlpha ? LOCAL_GL_RGBA
: LOCAL_GL_RGB;
auto width = src->mSize.width;
auto height = src->mSize.height;
mGL->fCopyTexImage2D(LOCAL_GL_TEXTURE_2D, 0, format, 0, 0, width,
height, 0);
}
mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
LOCAL_GL_TEXTURE_2D, mTempTex, 0);
}
}