gecko/gfx/layers/opengl/CanvasLayerOGL.cpp
2010-07-18 22:01:14 -07:00

253 lines
7.7 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 "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
using namespace mozilla;
using namespace mozilla::layers;
using namespace mozilla::gl;
CanvasLayerOGL::~CanvasLayerOGL()
{
mOGLManager->MakeCurrent();
if (mTexture) {
gl()->fDeleteTextures(1, &mTexture);
}
}
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;
}
if (aData.mSurface) {
mCanvasSurface = aData.mSurface;
mNeedsYFlip = PR_FALSE;
} 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);
}
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::Updated(const nsIntRect& aRect)
{
NS_ASSERTION(mUpdatedRect.IsEmpty(),
"CanvasLayer::Updated called more than once during a transaction!");
mOGLManager->MakeCurrent();
mUpdatedRect.UnionRect(mUpdatedRect, aRect);
if (mCanvasGLContext) {
if (gl()->BindOffscreenNeedsTexture(mCanvasGLContext) &&
mTexture == 0)
{
MakeTexture();
}
} else if (mCanvasSurface) {
PRBool newTexture = mTexture == 0;
if (newTexture) {
MakeTexture();
mUpdatedRect = mBounds;
} else {
gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
}
nsRefPtr<gfxImageSurface> updatedAreaImageSurface;
nsRefPtr<gfxASurface> sourceSurface = mCanvasSurface;
#ifdef XP_WIN
if (sourceSurface->GetType() == gfxASurface::SurfaceTypeWin32) {
sourceSurface = static_cast<gfxWindowsSurface*>(sourceSurface.get())->GetImageSurface();
if (!sourceSurface)
sourceSurface = mCanvasSurface;
}
#endif
#if 0
// XXX don't copy, blah.
// but need to deal with stride on the gl side; do this later.
if (mCanvasSurface->GetType() == gfxASurface::SurfaceTypeImage) {
gfxImageSurface *s = static_cast<gfxImageSurface*>(mCanvasSurface.get());
if (s->Format() == gfxASurface::ImageFormatARGB32 ||
s->Format() == gfxASurface::ImageFormatRGB24)
{
updatedAreaImageSurface = ...;
} else {
NS_WARNING("surface with format that we can't handle");
return;
}
} else
#endif
{
updatedAreaImageSurface =
new gfxImageSurface(gfxIntSize(mUpdatedRect.width, mUpdatedRect.height),
gfxASurface::ImageFormatARGB32);
nsRefPtr<gfxContext> ctx = new gfxContext(updatedAreaImageSurface);
ctx->Translate(gfxPoint(-mUpdatedRect.x, -mUpdatedRect.y));
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
ctx->SetSource(sourceSurface);
ctx->Paint();
}
if (newTexture) {
gl()->fTexImage2D(LOCAL_GL_TEXTURE_2D,
0,
LOCAL_GL_RGBA,
mUpdatedRect.width,
mUpdatedRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
updatedAreaImageSurface->Data());
} else {
gl()->fTexSubImage2D(LOCAL_GL_TEXTURE_2D,
0,
mUpdatedRect.x,
mUpdatedRect.y,
mUpdatedRect.width,
mUpdatedRect.height,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
updatedAreaImageSurface->Data());
}
}
// sanity
NS_ASSERTION(mBounds.Contains(mUpdatedRect),
"CanvasLayer: Updated rect bigger than bounds!");
}
void
CanvasLayerOGL::RenderLayer(int aPreviousDestination,
const nsIntPoint& aOffset)
{
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.
ColorTextureLayerProgram *program = nsnull;
gl()->fActiveTexture(LOCAL_GL_TEXTURE0);
if (mTexture) {
gl()->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
}
if (mCanvasGLContext) {
gl()->BindTex2DOffscreen(mCanvasGLContext);
DEBUG_GL_ERROR_CHECK(gl());
}
if (mCanvasGLContext) {
program = mOGLManager->GetRGBALayerProgram();
} else {
program = mOGLManager->GetBGRALayerProgram();
}
program->Activate();
program->SetLayerQuadRect(mBounds);
program->SetLayerTransform(mTransform);
program->SetLayerOpacity(GetOpacity());
program->SetRenderOffset(aOffset);
program->SetTextureUnit(0);
mOGLManager->BindAndDrawQuad(program, mNeedsYFlip ? true : false);
DEBUG_GL_ERROR_CHECK(gl());
if (mCanvasGLContext) {
gl()->UnbindTex2DOffscreen(mCanvasGLContext);
}
mUpdatedRect.Empty();
}