gecko/gfx/layers/opengl/CanvasLayerOGL.cpp

380 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@pobox.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "gfxSharedImageSurface.h"
#include "CanvasLayerOGL.h"
#include "gfxImageSurface.h"
#include "gfxContext.h"
#include "GLContextProvider.h"
#ifdef XP_WIN
#include "gfxWindowsSurface.h"
#include "WGLLibrary.h"
#endif
#ifdef XP_MACOSX
#include <OpenGL/OpenGL.h>
#endif
#ifdef MOZ_X11
#include "gfxXlibSurface.h"
#endif
using namespace mozilla;
using namespace mozilla::layers;
using namespace mozilla::gl;
void
CanvasLayerOGL::Destroy()
{
if (!mDestroyed) {
if (mTexture) {
GLContext *cx = mOGLManager->glForResources();
cx->MakeCurrent();
cx->fDeleteTextures(1, &mTexture);
}
#if defined(MOZ_WIDGET_GTK2) && !defined(MOZ_PLATFORM_MAEMO)
if (mPixmap) {
sGLXLibrary.DestroyPixmap(mPixmap);
mPixmap = 0;
}
#endif
mDestroyed = PR_TRUE;
}
}
void
CanvasLayerOGL::Initialize(const Data& aData)
{
NS_ASSERTION(mCanvasSurface == nsnull, "BasicCanvasLayer::Initialize called twice!");
if (aData.mGLContext != nsnull &&
aData.mSurface != nsnull)
{
NS_WARNING("CanvasLayerOGL can't have both surface and GLContext");
return;
}
mOGLManager->MakeCurrent();
if (aData.mSurface) {
mCanvasSurface = aData.mSurface;
mNeedsYFlip = PR_FALSE;
#if defined(MOZ_WIDGET_GTK2) && !defined(MOZ_PLATFORM_MAEMO)
mPixmap = sGLXLibrary.CreatePixmap(aData.mSurface);
if (mPixmap) {
if (aData.mSurface->GetContentType() == gfxASurface::CONTENT_COLOR_ALPHA) {
mLayerProgram = gl::RGBALayerProgramType;
} else {
mLayerProgram = gl::RGBXLayerProgramType;
}
MakeTexture();
}
#endif
} else if (aData.mGLContext) {
if (!aData.mGLContext->IsOffscreen()) {
NS_WARNING("CanvasLayerOGL with a non-offscreen GL context given");
return;
}
mCanvasGLContext = aData.mGLContext;
mGLBufferIsPremultiplied = aData.mGLBufferIsPremultiplied;
mNeedsYFlip = PR_TRUE;
} else {
NS_WARNING("CanvasLayerOGL::Initialize called without surface or GL context!");
return;
}
mBounds.SetRect(0, 0, aData.mSize.width, aData.mSize.height);
// Check the maximum texture size supported by GL. glTexImage2D supports
// images of up to 2 + GL_MAX_TEXTURE_SIZE
GLint texSize = gl()->GetMaxTextureSize();
if (mBounds.width > (2 + texSize) || mBounds.height > (2 + texSize)) {
mDelayedUpdates = PR_TRUE;
MakeTexture();
// This should only ever occur with 2d canvas, WebGL can't already have a texture
// of this size can it?
NS_ABORT_IF_FALSE(mCanvasSurface,
"Invalid texture size when WebGL surface already exists at that size?");
}
}
void
CanvasLayerOGL::MakeTexture()
{
if (mTexture != 0)
return;
gl()->fGenTextures(1, &mTexture);
gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_LINEAR);
gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_LINEAR);
gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
}
void
CanvasLayerOGL::UpdateSurface()
{
if (!mDirty)
return;
mDirty = PR_FALSE;
if (mDestroyed || mDelayedUpdates) {
return;
}
#if defined(MOZ_WIDGET_GTK2) && !defined(MOZ_PLATFORM_MAEMO)
if (mPixmap) {
return;
}
#endif
mOGLManager->MakeCurrent();
if (mCanvasGLContext &&
mCanvasGLContext->GetContextType() == gl()->GetContextType())
{
if (gl()->BindOffscreenNeedsTexture(mCanvasGLContext) &&
mTexture == 0)
{
MakeTexture();
}
} else {
nsRefPtr<gfxASurface> updatedAreaSurface;
if (mCanvasSurface) {
updatedAreaSurface = mCanvasSurface;
} else if (mCanvasGLContext) {
nsRefPtr<gfxImageSurface> updatedAreaImageSurface =
new gfxImageSurface(gfxIntSize(mBounds.width, mBounds.height),
gfxASurface::ImageFormatARGB32);
mCanvasGLContext->ReadPixelsIntoImageSurface(0, 0,
mBounds.width,
mBounds.height,
updatedAreaImageSurface);
updatedAreaSurface = updatedAreaImageSurface;
}
mLayerProgram =
gl()->UploadSurfaceToTexture(updatedAreaSurface,
mBounds,
mTexture,
false,
nsIntPoint(0, 0));
}
}
void
CanvasLayerOGL::RenderLayer(int aPreviousDestination,
const nsIntPoint& aOffset)
{
UpdateSurface();
FireDidTransactionCallback();
mOGLManager->MakeCurrent();
// XXX We're going to need a different program depending on if
// mGLBufferIsPremultiplied is TRUE or not. The RGBLayerProgram
// assumes that it's true.
gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
if (mTexture) {
gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
}
ColorTextureLayerProgram *program = nsnull;
bool useGLContext = mCanvasGLContext &&
mCanvasGLContext->GetContextType() == gl()->GetContextType();
nsIntRect drawRect = mBounds;
if (useGLContext) {
mCanvasGLContext->MakeCurrent();
mCanvasGLContext->fFlush();
gl()->MakeCurrent();
gl()->BindTex2DOffscreen(mCanvasGLContext);
program = mOGLManager->GetBasicLayerProgram(CanUseOpaqueSurface(), PR_TRUE);
} else if (mDelayedUpdates) {
NS_ABORT_IF_FALSE(mCanvasSurface, "WebGL canvases should always be using full texture upload");
drawRect.IntersectRect(drawRect, GetEffectiveVisibleRegion().GetBounds());
mLayerProgram =
gl()->UploadSurfaceToTexture(mCanvasSurface,
nsIntRect(0, 0, drawRect.width, drawRect.height),
mTexture,
true,
drawRect.TopLeft());
}
if (!program) {
program = mOGLManager->GetColorTextureLayerProgram(mLayerProgram);
}
#if defined(MOZ_WIDGET_GTK2) && !defined(MOZ_PLATFORM_MAEMO)
if (mPixmap && !mDelayedUpdates) {
sGLXLibrary.BindTexImage(mPixmap);
}
#endif
ApplyFilter(mFilter);
program->Activate();
program->SetLayerQuadRect(drawRect);
program->SetLayerTransform(GetEffectiveTransform());
program->SetLayerOpacity(GetEffectiveOpacity());
program->SetRenderOffset(aOffset);
program->SetTextureUnit(0);
mOGLManager->BindAndDrawQuad(program, mNeedsYFlip ? true : false);
#if defined(MOZ_WIDGET_GTK2) && !defined(MOZ_PLATFORM_MAEMO)
if (mPixmap && !mDelayedUpdates) {
sGLXLibrary.ReleaseTexImage(mPixmap);
}
#endif
if (useGLContext) {
gl()->UnbindTex2DOffscreen(mCanvasGLContext);
}
}
ShadowCanvasLayerOGL::ShadowCanvasLayerOGL(LayerManagerOGL* aManager)
: ShadowCanvasLayer(aManager, nsnull)
, LayerOGL(aManager)
{
mImplData = static_cast<LayerOGL*>(this);
}
ShadowCanvasLayerOGL::~ShadowCanvasLayerOGL()
{}
void
ShadowCanvasLayerOGL::Initialize(const Data& aData)
{
NS_RUNTIMEABORT("Incompatibe surface type");
}
void
ShadowCanvasLayerOGL::Init(const SurfaceDescriptor& aNewFront, const nsIntSize& aSize)
{
mDeadweight = aNewFront;
nsRefPtr<gfxASurface> surf = ShadowLayerForwarder::OpenDescriptor(mDeadweight);
mTexImage = gl()->CreateTextureImage(nsIntSize(aSize.width, aSize.height),
surf->GetContentType(),
LOCAL_GL_CLAMP_TO_EDGE);
}
void
ShadowCanvasLayerOGL::Swap(const SurfaceDescriptor& aNewFront,
SurfaceDescriptor* aNewBack)
{
if (!mDestroyed && mTexImage) {
nsRefPtr<gfxASurface> surf = ShadowLayerForwarder::OpenDescriptor(aNewFront);
gfxSize sz = surf->GetSize();
nsIntRegion updateRegion(nsIntRect(0, 0, sz.width, sz.height));
mTexImage->DirectUpdate(surf, updateRegion);
}
*aNewBack = aNewFront;
}
void
ShadowCanvasLayerOGL::DestroyFrontBuffer()
{
mTexImage = nsnull;
if (IsSurfaceDescriptorValid(mDeadweight)) {
mOGLManager->DestroySharedSurface(&mDeadweight, mAllocator);
}
}
void
ShadowCanvasLayerOGL::Disconnect()
{
Destroy();
}
void
ShadowCanvasLayerOGL::Destroy()
{
if (!mDestroyed) {
mDestroyed = PR_TRUE;
mTexImage = nsnull;
}
}
Layer*
ShadowCanvasLayerOGL::GetLayer()
{
return this;
}
void
ShadowCanvasLayerOGL::RenderLayer(int aPreviousFrameBuffer,
const nsIntPoint& aOffset)
{
mOGLManager->MakeCurrent();
gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexImage->Texture());
ColorTextureLayerProgram *program =
mOGLManager->GetColorTextureLayerProgram(mTexImage->GetShaderProgramType());
ApplyFilter(mFilter);
program->Activate();
program->SetLayerQuadRect(nsIntRect(nsIntPoint(0, 0), mTexImage->GetSize()));
program->SetLayerTransform(GetEffectiveTransform());
program->SetLayerOpacity(GetEffectiveOpacity());
program->SetRenderOffset(aOffset);
program->SetTextureUnit(0);
mOGLManager->BindAndDrawQuad(program);
}