gecko/gfx/gl/SharedSurfaceGL.cpp

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/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
/* 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 "SharedSurfaceGL.h"
#include "GLContext.h"
#include "GLBlitHelper.h"
#include "ScopedGLHelpers.h"
#include "mozilla/gfx/2D.h"
#include "GLReadTexImageHelper.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace gl {
// |src| must begin and end locked, though we may
// temporarily unlock it if we need to.
void
SharedSurface_GL::ProdCopy(SharedSurface_GL* src, SharedSurface_GL* dest,
SurfaceFactory_GL* factory)
{
GLContext* gl = src->GL();
gl->MakeCurrent();
if (src->AttachType() == AttachmentType::Screen &&
dest->AttachType() == AttachmentType::Screen)
{
// Here, we actually need to blit through a temp surface, so let's make one.
nsAutoPtr<SharedSurface_GLTexture> tempSurf(
SharedSurface_GLTexture::Create(gl, gl,
factory->Formats(),
src->Size(),
factory->Caps().alpha));
ProdCopy(src, tempSurf, factory);
ProdCopy(tempSurf, dest, factory);
return;
}
if (src->AttachType() == AttachmentType::Screen) {
SharedSurface_GL* origLocked = gl->GetLockedSurface();
bool srcNeedsUnlock = false;
bool origNeedsRelock = false;
if (origLocked != src) {
if (origLocked) {
origLocked->UnlockProd();
origNeedsRelock = true;
}
src->LockProd();
srcNeedsUnlock = true;
}
if (dest->AttachType() == AttachmentType::GLTexture) {
GLuint destTex = dest->ProdTexture();
GLenum destTarget = dest->ProdTextureTarget();
gl->BlitHelper()->BlitFramebufferToTexture(0, destTex, src->Size(), dest->Size(), destTarget);
} else if (dest->AttachType() == AttachmentType::GLRenderbuffer) {
GLuint destRB = dest->ProdRenderbuffer();
ScopedFramebufferForRenderbuffer destWrapper(gl, destRB);
gl->BlitHelper()->BlitFramebufferToFramebuffer(0, destWrapper.FB(),
src->Size(), dest->Size());
} else {
MOZ_CRASH("Unhandled dest->AttachType().");
}
if (srcNeedsUnlock)
src->UnlockProd();
if (origNeedsRelock)
origLocked->LockProd();
return;
}
if (dest->AttachType() == AttachmentType::Screen) {
SharedSurface_GL* origLocked = gl->GetLockedSurface();
bool destNeedsUnlock = false;
bool origNeedsRelock = false;
if (origLocked != dest) {
if (origLocked) {
origLocked->UnlockProd();
origNeedsRelock = true;
}
dest->LockProd();
destNeedsUnlock = true;
}
if (src->AttachType() == AttachmentType::GLTexture) {
GLuint srcTex = src->ProdTexture();
GLenum srcTarget = src->ProdTextureTarget();
gl->BlitHelper()->BlitTextureToFramebuffer(srcTex, 0, src->Size(), dest->Size(), srcTarget);
} else if (src->AttachType() == AttachmentType::GLRenderbuffer) {
GLuint srcRB = src->ProdRenderbuffer();
ScopedFramebufferForRenderbuffer srcWrapper(gl, srcRB);
gl->BlitHelper()->BlitFramebufferToFramebuffer(srcWrapper.FB(), 0,
src->Size(), dest->Size());
} else {
MOZ_CRASH("Unhandled src->AttachType().");
}
if (destNeedsUnlock)
dest->UnlockProd();
if (origNeedsRelock)
origLocked->LockProd();
return;
}
// Alright, done with cases involving Screen types.
// Only {src,dest}x{texture,renderbuffer} left.
if (src->AttachType() == AttachmentType::GLTexture) {
GLuint srcTex = src->ProdTexture();
GLenum srcTarget = src->ProdTextureTarget();
if (dest->AttachType() == AttachmentType::GLTexture) {
GLuint destTex = dest->ProdTexture();
GLenum destTarget = dest->ProdTextureTarget();
gl->BlitHelper()->BlitTextureToTexture(srcTex, destTex,
src->Size(), dest->Size(),
srcTarget, destTarget);
return;
}
if (dest->AttachType() == AttachmentType::GLRenderbuffer) {
GLuint destRB = dest->ProdRenderbuffer();
ScopedFramebufferForRenderbuffer destWrapper(gl, destRB);
gl->BlitHelper()->BlitTextureToFramebuffer(srcTex, destWrapper.FB(),
src->Size(), dest->Size(), srcTarget);
return;
}
MOZ_CRASH("Unhandled dest->AttachType().");
}
if (src->AttachType() == AttachmentType::GLRenderbuffer) {
GLuint srcRB = src->ProdRenderbuffer();
ScopedFramebufferForRenderbuffer srcWrapper(gl, srcRB);
if (dest->AttachType() == AttachmentType::GLTexture) {
GLuint destTex = dest->ProdTexture();
GLenum destTarget = dest->ProdTextureTarget();
gl->BlitHelper()->BlitFramebufferToTexture(srcWrapper.FB(), destTex,
src->Size(), dest->Size(), destTarget);
return;
}
if (dest->AttachType() == AttachmentType::GLRenderbuffer) {
GLuint destRB = dest->ProdRenderbuffer();
ScopedFramebufferForRenderbuffer destWrapper(gl, destRB);
gl->BlitHelper()->BlitFramebufferToFramebuffer(srcWrapper.FB(), destWrapper.FB(),
src->Size(), dest->Size());
return;
}
MOZ_CRASH("Unhandled dest->AttachType().");
}
MOZ_CRASH("Unhandled src->AttachType().");
}
void
SharedSurface_GL::LockProd()
{
MOZ_ASSERT(!mIsLocked);
LockProdImpl();
mGL->LockSurface(this);
mIsLocked = true;
}
void
SharedSurface_GL::UnlockProd()
{
if (!mIsLocked)
return;
UnlockProdImpl();
mGL->UnlockSurface(this);
mIsLocked = false;
}
SurfaceFactory_GL::SurfaceFactory_GL(GLContext* gl,
SharedSurfaceType type,
const SurfaceCaps& caps)
: SurfaceFactory(type, caps)
, mGL(gl)
, mFormats(gl->ChooseGLFormats(caps))
{
ChooseBufferBits(caps, mDrawCaps, mReadCaps);
}
void
SurfaceFactory_GL::ChooseBufferBits(const SurfaceCaps& caps,
SurfaceCaps& drawCaps,
SurfaceCaps& readCaps) const
{
SurfaceCaps screenCaps;
screenCaps.color = caps.color;
screenCaps.alpha = caps.alpha;
screenCaps.bpp16 = caps.bpp16;
screenCaps.depth = caps.depth;
screenCaps.stencil = caps.stencil;
screenCaps.antialias = caps.antialias;
screenCaps.preserve = caps.preserve;
if (caps.antialias) {
drawCaps = screenCaps;
readCaps.Clear();
// Color caps need to be duplicated in readCaps.
readCaps.color = caps.color;
readCaps.alpha = caps.alpha;
readCaps.bpp16 = caps.bpp16;
} else {
drawCaps.Clear();
readCaps = screenCaps;
}
}
SharedSurface_Basic*
SharedSurface_Basic::Create(GLContext* gl,
const GLFormats& formats,
const IntSize& size,
bool hasAlpha)
{
gl->MakeCurrent();
GLuint tex = CreateTexture(gl, formats.color_texInternalFormat,
formats.color_texFormat,
formats.color_texType,
size);
SurfaceFormat format = SurfaceFormat::B8G8R8X8;
switch (formats.color_texInternalFormat) {
case LOCAL_GL_RGB:
case LOCAL_GL_RGB8:
if (formats.color_texType == LOCAL_GL_UNSIGNED_SHORT_5_6_5)
format = SurfaceFormat::R5G6B5;
else
format = SurfaceFormat::B8G8R8X8;
break;
case LOCAL_GL_RGBA:
case LOCAL_GL_RGBA8:
format = SurfaceFormat::B8G8R8A8;
break;
default:
MOZ_CRASH("Unhandled Tex format.");
}
return new SharedSurface_Basic(gl, size, hasAlpha, format, tex);
}
SharedSurface_Basic::SharedSurface_Basic(GLContext* gl,
const IntSize& size,
bool hasAlpha,
SurfaceFormat format,
GLuint tex)
: SharedSurface_GL(SharedSurfaceType::Basic,
AttachmentType::GLTexture,
gl,
size,
hasAlpha)
, mTex(tex), mFB(0)
{
mGL->MakeCurrent();
mGL->fGenFramebuffers(1, &mFB);
ScopedBindFramebuffer autoFB(mGL, mFB);
mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
LOCAL_GL_TEXTURE_2D,
mTex,
0);
GLenum status = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
if (status != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
mGL->fDeleteFramebuffers(1, &mFB);
mFB = 0;
}
mData = Factory::CreateDataSourceSurfaceWithStride(size, format,
GetAlignedStride<4>(size.width * BytesPerPixel(format)));
}
SharedSurface_Basic::~SharedSurface_Basic()
{
if (!mGL->MakeCurrent())
return;
if (mFB)
mGL->fDeleteFramebuffers(1, &mFB);
mGL->fDeleteTextures(1, &mTex);
}
void
SharedSurface_Basic::Fence()
{
mGL->MakeCurrent();
ScopedBindFramebuffer autoFB(mGL, mFB);
ReadPixelsIntoDataSurface(mGL, mData);
}
SharedSurface_GLTexture*
SharedSurface_GLTexture::Create(GLContext* prodGL,
GLContext* consGL,
const GLFormats& formats,
const gfx::IntSize& size,
bool hasAlpha,
GLuint texture)
{
MOZ_ASSERT(prodGL);
MOZ_ASSERT(!consGL || prodGL->SharesWith(consGL));
prodGL->MakeCurrent();
GLuint tex = texture;
bool ownsTex = false;
if (!tex) {
tex = CreateTextureForOffscreen(prodGL, formats, size);
ownsTex = true;
}
return new SharedSurface_GLTexture(prodGL, consGL, size, hasAlpha, tex, ownsTex);
}
SharedSurface_GLTexture::~SharedSurface_GLTexture()
{
if (!mGL->MakeCurrent())
return;
if (mOwnsTex) {
mGL->fDeleteTextures(1, &mTex);
}
if (mSync) {
mGL->fDeleteSync(mSync);
}
}
void
SharedSurface_GLTexture::Fence()
{
MutexAutoLock lock(mMutex);
mGL->MakeCurrent();
if (mConsGL && mGL->IsExtensionSupported(GLContext::ARB_sync)) {
if (mSync) {
mGL->fDeleteSync(mSync);
mSync = 0;
}
mSync = mGL->fFenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
if (mSync) {
mGL->fFlush();
return;
}
}
MOZ_ASSERT(!mSync);
mGL->fFinish();
}
bool
SharedSurface_GLTexture::WaitSync()
{
MutexAutoLock lock(mMutex);
if (!mSync) {
// We must have used glFinish instead of glFenceSync.
return true;
}
mConsGL->MakeCurrent();
MOZ_ASSERT(mConsGL->IsExtensionSupported(GLContext::ARB_sync));
mConsGL->fWaitSync(mSync,
0,
LOCAL_GL_TIMEOUT_IGNORED);
mConsGL->fDeleteSync(mSync);
mSync = 0;
return true;
}
GLuint
SharedSurface_GLTexture::ConsTexture(GLContext* consGL)
{
MutexAutoLock lock(mMutex);
MOZ_ASSERT(consGL);
MOZ_ASSERT(mGL->SharesWith(consGL));
MOZ_ASSERT_IF(mConsGL, consGL == mConsGL);
mConsGL = consGL;
return mTex;
}
} /* namespace gfx */
} /* namespace mozilla */