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gecko-dev/gfx/layers/opengl/LayerManagerOGL.cpp

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/* -*- 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) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bas Schouten <bschouten@mozilla.org>
* Frederic Plourde <frederic.plourde@collabora.co.uk>
* 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 ***** */
#ifdef MOZ_IPC
# include "mozilla/layers/PLayers.h"
#endif // MOZ_IPC
#include "LayerManagerOGL.h"
#include "ThebesLayerOGL.h"
#include "ContainerLayerOGL.h"
#include "ImageLayerOGL.h"
#include "ColorLayerOGL.h"
#include "CanvasLayerOGL.h"
#include "LayerManagerOGLShaders.h"
#include "gfxContext.h"
#include "nsIWidget.h"
#include "GLContext.h"
#include "GLContextProvider.h"
#include "nsIServiceManager.h"
#include "nsIConsoleService.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch2.h"
namespace mozilla {
namespace layers {
using namespace mozilla::gl;
#ifdef CHECK_CURRENT_PROGRAM
int LayerManagerOGLProgram::sCurrentProgramKey = 0;
#endif
/**
* LayerManagerOGL
*/
LayerManagerOGL::LayerManagerOGL(nsIWidget *aWidget)
: mWidget(aWidget)
, mWidgetSize(-1, -1)
, mBackBufferFBO(0)
, mBackBufferTexture(0)
, mBackBufferSize(-1, -1)
, mHasBGRA(0)
{
}
LayerManagerOGL::~LayerManagerOGL()
{
Destroy();
}
void
LayerManagerOGL::Destroy()
{
if (!mDestroyed) {
if (mRoot) {
RootLayer()->Destroy();
}
mRoot = nsnull;
// Make a copy, since SetLayerManager will cause mImageContainers
// to get mutated.
nsTArray<ImageContainer*> imageContainers(mImageContainers);
for (PRUint32 i = 0; i < imageContainers.Length(); ++i) {
ImageContainer *c = imageContainers[i];
c->SetLayerManager(nsnull);
}
CleanupResources();
mDestroyed = PR_TRUE;
}
}
void
LayerManagerOGL::CleanupResources()
{
if (!mGLContext)
return;
nsRefPtr<GLContext> ctx = mGLContext->GetSharedContext();
if (!ctx) {
ctx = mGLContext;
}
ctx->MakeCurrent();
for (unsigned int i = 0; i < mPrograms.Length(); ++i)
delete mPrograms[i];
mPrograms.Clear();
ctx->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
if (mBackBufferFBO) {
ctx->fDeleteFramebuffers(1, &mBackBufferFBO);
mBackBufferFBO = 0;
}
if (mBackBufferTexture) {
ctx->fDeleteTextures(1, &mBackBufferTexture);
mBackBufferTexture = 0;
}
if (mQuadVBO) {
ctx->fDeleteBuffers(1, &mQuadVBO);
mQuadVBO = 0;
}
mGLContext = nsnull;
}
already_AddRefed<mozilla::gl::GLContext>
LayerManagerOGL::CreateContext()
{
nsRefPtr<GLContext> context;
#ifdef XP_WIN
if (PR_GetEnv("MOZ_LAYERS_PREFER_EGL")) {
printf_stderr("Trying GL layers...\n");
context = gl::GLContextProviderEGL::CreateForWindow(mWidget);
}
#endif
if (!context)
context = gl::GLContextProvider::CreateForWindow(mWidget);
if (!context) {
NS_WARNING("Failed to create LayerManagerOGL context");
}
return context.forget();
}
PRBool
LayerManagerOGL::Initialize(nsRefPtr<GLContext> aContext)
{
// Do not allow double intiailization
NS_ABORT_IF_FALSE(mGLContext == nsnull, "Don't reiniailize layer managers");
if (!aContext)
return PR_FALSE;
mGLContext = aContext;
MakeCurrent();
DEBUG_GL_ERROR_CHECK(mGLContext);
mHasBGRA =
mGLContext->IsExtensionSupported(gl::GLContext::EXT_texture_format_BGRA8888) ||
mGLContext->IsExtensionSupported(gl::GLContext::EXT_bgra);
mGLContext->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA,
LOCAL_GL_ONE, LOCAL_GL_ONE);
mGLContext->fEnable(LOCAL_GL_BLEND);
// We unfortunately can't do generic initialization here, since the
// concrete type actually matters. This macro generates the
// initialization using a concrete type and index.
#define SHADER_PROGRAM(penum, ptype, vsstr, fsstr) do { \
NS_ASSERTION(programIndex++ == penum, "out of order shader initialization!"); \
ptype *p = new ptype(mGLContext); \
if (!p->Initialize(vsstr, fsstr)) { \
delete p; \
return PR_FALSE; \
} \
mPrograms.AppendElement(p); \
} while (0)
// NOTE: Order matters here, and should be in the same order as the
// ProgramType enum!
#ifdef DEBUG
GLint programIndex = 0;
#endif
/* Layer programs */
SHADER_PROGRAM(RGBALayerProgramType, ColorTextureLayerProgram,
sLayerVS, sRGBATextureLayerFS);
SHADER_PROGRAM(BGRALayerProgramType, ColorTextureLayerProgram,
sLayerVS, sBGRATextureLayerFS);
SHADER_PROGRAM(RGBXLayerProgramType, ColorTextureLayerProgram,
sLayerVS, sRGBXTextureLayerFS);
SHADER_PROGRAM(BGRXLayerProgramType, ColorTextureLayerProgram,
sLayerVS, sBGRXTextureLayerFS);
SHADER_PROGRAM(RGBARectLayerProgramType, ColorTextureLayerProgram,
sLayerVS, sRGBARectTextureLayerFS);
SHADER_PROGRAM(ColorLayerProgramType, SolidColorLayerProgram,
sLayerVS, sSolidColorLayerFS);
SHADER_PROGRAM(YCbCrLayerProgramType, YCbCrTextureLayerProgram,
sLayerVS, sYCbCrTextureLayerFS);
SHADER_PROGRAM(ComponentAlphaPass1ProgramType, ComponentAlphaTextureLayerProgram,
sLayerVS, sComponentPass1FS);
SHADER_PROGRAM(ComponentAlphaPass2ProgramType, ComponentAlphaTextureLayerProgram,
sLayerVS, sComponentPass2FS);
/* Copy programs (used for final framebuffer blit) */
SHADER_PROGRAM(Copy2DProgramType, CopyProgram,
sCopyVS, sCopy2DFS);
SHADER_PROGRAM(Copy2DRectProgramType, CopyProgram,
sCopyVS, sCopy2DRectFS);
#undef SHADER_PROGRAM
NS_ASSERTION(programIndex == NumProgramTypes,
"not all programs were initialized!");
/**
* We'll test the ability here to bind NPOT textures to a framebuffer, if
* this fails we'll try ARB_texture_rectangle.
*/
mGLContext->fGenFramebuffers(1, &mBackBufferFBO);
GLenum textureTargets[] = {
LOCAL_GL_TEXTURE_2D,
#ifndef USE_GLES2
LOCAL_GL_TEXTURE_RECTANGLE_ARB
#endif
};
mFBOTextureTarget = LOCAL_GL_NONE;
for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(textureTargets); i++) {
GLenum target = textureTargets[i];
mGLContext->fGenTextures(1, &mBackBufferTexture);
mGLContext->fBindTexture(target, mBackBufferTexture);
mGLContext->fTexParameteri(target,
LOCAL_GL_TEXTURE_MIN_FILTER,
LOCAL_GL_NEAREST);
mGLContext->fTexParameteri(target,
LOCAL_GL_TEXTURE_MAG_FILTER,
LOCAL_GL_NEAREST);
mGLContext->fTexImage2D(target,
0,
LOCAL_GL_RGBA,
5, 3, /* sufficiently NPOT */
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
NULL);
// unbind this texture, in preparation for binding it to the FBO
mGLContext->fBindTexture(target, 0);
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mBackBufferFBO);
mGLContext->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
target,
mBackBufferTexture,
0);
if (mGLContext->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER) ==
LOCAL_GL_FRAMEBUFFER_COMPLETE)
{
mFBOTextureTarget = target;
break;
}
// We weren't succesful with this texture, so we don't need it
// any more.
mGLContext->fDeleteTextures(1, &mBackBufferTexture);
}
if (mFBOTextureTarget == LOCAL_GL_NONE) {
/* Unable to find a texture target that works with FBOs and NPOT textures */
return false;
}
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
if (mFBOTextureTarget == LOCAL_GL_TEXTURE_RECTANGLE_ARB) {
/* If we're using TEXTURE_RECTANGLE, then we must have the ARB
* extension -- the EXT variant does not provide support for
* texture rectangle access inside GLSL (sampler2DRect,
* texture2DRect).
*/
if (!mGLContext->IsExtensionSupported(gl::GLContext::ARB_texture_rectangle))
return false;
}
// back to default framebuffer, to avoid confusion
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
DEBUG_GL_ERROR_CHECK(mGLContext);
/* Create a simple quad VBO */
mGLContext->fGenBuffers(1, &mQuadVBO);
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mQuadVBO);
GLfloat vertices[] = {
/* First quad vertices */
0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
/* Then quad texcoords */
0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
/* Then flipped quad texcoords */
0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
};
mGLContext->fBufferData(LOCAL_GL_ARRAY_BUFFER, sizeof(vertices), vertices, LOCAL_GL_STATIC_DRAW);
DEBUG_GL_ERROR_CHECK(mGLContext);
nsCOMPtr<nsIConsoleService>
console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (console) {
nsString msg;
msg +=
NS_LITERAL_STRING("OpenGL LayerManager Initialized Succesfully.\nVersion: ");
msg += NS_ConvertUTF8toUTF16(
nsDependentCString((const char*)mGLContext->fGetString(LOCAL_GL_VERSION)));
msg += NS_LITERAL_STRING("\nVendor: ");
msg += NS_ConvertUTF8toUTF16(
nsDependentCString((const char*)mGLContext->fGetString(LOCAL_GL_VENDOR)));
msg += NS_LITERAL_STRING("\nRenderer: ");
msg += NS_ConvertUTF8toUTF16(
nsDependentCString((const char*)mGLContext->fGetString(LOCAL_GL_RENDERER)));
msg += NS_LITERAL_STRING("\nFBO Texture Target: ");
if (mFBOTextureTarget == LOCAL_GL_TEXTURE_2D)
msg += NS_LITERAL_STRING("TEXTURE_2D");
else
msg += NS_LITERAL_STRING("TEXTURE_RECTANGLE");
console->LogStringMessage(msg.get());
}
DEBUG_GL_ERROR_CHECK(mGLContext);
return true;
}
void
LayerManagerOGL::SetClippingRegion(const nsIntRegion& aClippingRegion)
{
mClippingRegion = aClippingRegion;
}
void
LayerManagerOGL::BeginTransaction()
{
}
void
LayerManagerOGL::BeginTransactionWithTarget(gfxContext *aTarget)
{
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG(("[----- BeginTransaction"));
Log();
#endif
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return;
}
mTarget = aTarget;
}
bool
LayerManagerOGL::EndEmptyTransaction()
{
if (!mRoot)
return false;
EndTransaction(nsnull, nsnull);
return true;
}
void
LayerManagerOGL::EndTransaction(DrawThebesLayerCallback aCallback,
void* aCallbackData)
{
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG((" ----- (beginning paint)"));
Log();
#endif
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return;
}
if (mRoot) {
// The results of our drawing always go directly into a pixel buffer,
// so we don't need to pass any global transform here.
mRoot->ComputeEffectiveTransforms(gfx3DMatrix());
mThebesLayerCallback = aCallback;
mThebesLayerCallbackData = aCallbackData;
Render();
mThebesLayerCallback = nsnull;
mThebesLayerCallbackData = nsnull;
}
mTarget = NULL;
#ifdef MOZ_LAYERS_HAVE_LOG
Log();
MOZ_LAYERS_LOG(("]----- EndTransaction"));
#endif
}
already_AddRefed<ThebesLayer>
LayerManagerOGL::CreateThebesLayer()
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
nsRefPtr<ThebesLayer> layer = new ThebesLayerOGL(this);
return layer.forget();
}
already_AddRefed<ContainerLayer>
LayerManagerOGL::CreateContainerLayer()
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
nsRefPtr<ContainerLayer> layer = new ContainerLayerOGL(this);
return layer.forget();
}
already_AddRefed<ImageContainer>
LayerManagerOGL::CreateImageContainer()
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
nsRefPtr<ImageContainer> container = new ImageContainerOGL(this);
RememberImageContainer(container);
return container.forget();
}
already_AddRefed<ImageLayer>
LayerManagerOGL::CreateImageLayer()
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
nsRefPtr<ImageLayer> layer = new ImageLayerOGL(this);
return layer.forget();
}
already_AddRefed<ColorLayer>
LayerManagerOGL::CreateColorLayer()
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
nsRefPtr<ColorLayer> layer = new ColorLayerOGL(this);
return layer.forget();
}
already_AddRefed<CanvasLayer>
LayerManagerOGL::CreateCanvasLayer()
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
nsRefPtr<CanvasLayer> layer = new CanvasLayerOGL(this);
return layer.forget();
}
void
LayerManagerOGL::ForgetImageContainer(ImageContainer *aContainer)
{
NS_ASSERTION(aContainer->Manager() == this,
"ForgetImageContainer called on non-owned container!");
if (!mImageContainers.RemoveElement(aContainer)) {
NS_WARNING("ForgetImageContainer couldn't find container it was supposed to forget!");
return;
}
}
void
LayerManagerOGL::RememberImageContainer(ImageContainer *aContainer)
{
NS_ASSERTION(aContainer->Manager() == this,
"RememberImageContainer called on non-owned container!");
mImageContainers.AppendElement(aContainer);
}
LayerOGL*
LayerManagerOGL::RootLayer() const
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
return static_cast<LayerOGL*>(mRoot->ImplData());
}
void
LayerManagerOGL::Render()
{
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return;
}
nsIntRect rect;
mWidget->GetClientBounds(rect);
WorldTransformRect(rect);
GLint width = rect.width;
GLint height = rect.height;
// We can't draw anything to something with no area
// so just return
if (width == 0 || height == 0)
return;
// If the widget size changed, we have to force a MakeCurrent
// to make sure that GL sees the updated widget size.
if (mWidgetSize.width != width ||
mWidgetSize.height != height)
{
MakeCurrent(PR_TRUE);
mWidgetSize.width = width;
mWidgetSize.height = height;
} else {
MakeCurrent();
}
DEBUG_GL_ERROR_CHECK(mGLContext);
SetupBackBuffer(width, height);
SetupPipeline(width, height, ApplyWorldTransform);
// Default blend function implements "OVER"
mGLContext->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA,
LOCAL_GL_ONE, LOCAL_GL_ONE);
mGLContext->fEnable(LOCAL_GL_BLEND);
DEBUG_GL_ERROR_CHECK(mGLContext);
const nsIntRect *clipRect = mRoot->GetClipRect();
if (clipRect) {
nsIntRect r = *clipRect;
WorldTransformRect(r);
if (IsDrawingFlipped())
mGLContext->FixWindowCoordinateRect(r, mWidgetSize.height);
mGLContext->fScissor(r.x, r.y, r.width, r.height);
} else {
mGLContext->fScissor(0, 0, width, height);
}
mGLContext->fEnable(LOCAL_GL_SCISSOR_TEST);
DEBUG_GL_ERROR_CHECK(mGLContext);
mGLContext->fClearColor(0.0, 0.0, 0.0, 0.0);
mGLContext->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
// Render our layers.
RootLayer()->RenderLayer(mGLContext->IsDoubleBuffered() && !mTarget ? 0 : mBackBufferFBO,
nsIntPoint(0, 0));
static_cast<nsIWidget_MOZILLA_2_0_BRANCH*>(mWidget)->DrawOver(this, rect);
DEBUG_GL_ERROR_CHECK(mGLContext);
if (mTarget) {
CopyToTarget();
return;
}
if (mGLContext->IsDoubleBuffered()) {
mGLContext->SwapBuffers();
return;
}
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
CopyProgram *copyprog = GetCopy2DProgram();
if (mFBOTextureTarget == LOCAL_GL_TEXTURE_RECTANGLE_ARB) {
copyprog = GetCopy2DRectProgram();
}
mGLContext->fBindTexture(mFBOTextureTarget, mBackBufferTexture);
copyprog->Activate();
copyprog->SetTextureUnit(0);
if (copyprog->GetTexCoordMultiplierUniformLocation() != -1) {
float f[] = { float(width), float(height) };
copyprog->SetUniform(copyprog->GetTexCoordMultiplierUniformLocation(),
2, f);
}
DEBUG_GL_ERROR_CHECK(mGLContext);
// we're going to use client-side vertex arrays for this.
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
// "COPY"
mGLContext->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ZERO,
LOCAL_GL_ONE, LOCAL_GL_ZERO);
// enable our vertex attribs; we'll call glVertexPointer below
// to fill with the correct data.
GLint vcattr = copyprog->AttribLocation(CopyProgram::VertexCoordAttrib);
GLint tcattr = copyprog->AttribLocation(CopyProgram::TexCoordAttrib);
mGLContext->fEnableVertexAttribArray(vcattr);
mGLContext->fEnableVertexAttribArray(tcattr);
const nsIntRect *r;
nsIntRegionRectIterator iter(mClippingRegion);
while ((r = iter.Next()) != nsnull) {
nsIntRect cRect = *r; r = &cRect;
WorldTransformRect(cRect);
float left = (GLfloat)r->x / width;
float right = (GLfloat)r->XMost() / width;
float top = (GLfloat)r->y / height;
float bottom = (GLfloat)r->YMost() / height;
float vertices[] = { left * 2.0f - 1.0f,
-(top * 2.0f - 1.0f),
right * 2.0f - 1.0f,
-(top * 2.0f - 1.0f),
left * 2.0f - 1.0f,
-(bottom * 2.0f - 1.0f),
right * 2.0f - 1.0f,
-(bottom * 2.0f - 1.0f) };
float coords[] = { left, top,
right, top,
left, bottom,
right, bottom };
mGLContext->fVertexAttribPointer(vcattr,
2, LOCAL_GL_FLOAT,
LOCAL_GL_FALSE,
0, vertices);
mGLContext->fVertexAttribPointer(tcattr,
2, LOCAL_GL_FLOAT,
LOCAL_GL_FALSE,
0, coords);
mGLContext->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
DEBUG_GL_ERROR_CHECK(mGLContext);
}
mGLContext->fDisableVertexAttribArray(vcattr);
mGLContext->fDisableVertexAttribArray(tcattr);
DEBUG_GL_ERROR_CHECK(mGLContext);
mGLContext->fFlush();
DEBUG_GL_ERROR_CHECK(mGLContext);
}
void
LayerManagerOGL::SetWorldTransform(const gfxMatrix& aMatrix)
{
NS_ASSERTION(aMatrix.PreservesAxisAlignedRectangles(),
"SetWorldTransform only accepts matrices that satisfy PreservesAxisAlignedRectangles");
NS_ASSERTION(!aMatrix.HasNonIntegerScale(),
"SetWorldTransform only accepts matrices with integer scale");
mWorldMatrix = aMatrix;
}
gfxMatrix&
LayerManagerOGL::GetWorldTransform(void)
{
return mWorldMatrix;
}
void
LayerManagerOGL::WorldTransformRect(nsIntRect& aRect)
{
gfxRect grect(aRect.x, aRect.y, aRect.width, aRect.height);
grect = mWorldMatrix.TransformBounds(grect);
aRect.SetRect(grect.pos.x, grect.pos.y, grect.size.width, grect.size.height);
}
void
LayerManagerOGL::SetupPipeline(int aWidth, int aHeight, WorldTransforPolicy aTransformPolicy)
{
// Set the viewport correctly.
//
// When we're not double buffering, we use a FBO as our backbuffer.
// We use a normal view transform in that case, meaning that our FBO
// and all other FBOs look upside down. We then do a Y-flip when
// we draw it into the window.
mGLContext->fViewport(0, 0, aWidth, aHeight);
// Matrix to transform to viewport space ( <-1.0, 1.0> topleft,
// <1.0, -1.0> bottomright).
//
// When we are double buffering, we change the view matrix around so
// that everything is right-side up; we're drawing directly into
// the window's back buffer, so this keeps things looking correct.
//
// XXX we could potentially always use the double-buffering view
// matrix and just change our single-buffer draw code.
//
// XXX we keep track of whether the window size changed, so we can
// skip this update if it hadn't since the last call.
gfx3DMatrix viewMatrix;
if (IsDrawingFlipped()) {
/* If it's double buffered, we don't have a frontbuffer FBO,
* so put in a Y-flip in this transform.
*/
viewMatrix._11 = 2.0f / float(aWidth);
viewMatrix._22 = -2.0f / float(aHeight);
viewMatrix._41 = -1.0f;
viewMatrix._42 = 1.0f;
} else {
viewMatrix._11 = 2.0f / float(aWidth);
viewMatrix._22 = 2.0f / float(aHeight);
viewMatrix._41 = -1.0f;
viewMatrix._42 = -1.0f;
}
if (aTransformPolicy == ApplyWorldTransform) {
viewMatrix = gfx3DMatrix::From2D(mWorldMatrix) * viewMatrix;
}
SetLayerProgramProjectionMatrix(viewMatrix);
}
void
LayerManagerOGL::SetupBackBuffer(int aWidth, int aHeight)
{
if (mGLContext->IsDoubleBuffered() && !mTarget) {
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
return;
}
// Do we have a FBO of the right size already?
if (mBackBufferSize.width == aWidth &&
mBackBufferSize.height == aHeight)
{
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mBackBufferFBO);
return;
}
// we already have a FBO, but we need to resize its texture.
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
mGLContext->fBindTexture(mFBOTextureTarget, mBackBufferTexture);
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aWidth, aHeight,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
NULL);
mGLContext->fBindTexture(mFBOTextureTarget, 0);
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mBackBufferFBO);
mGLContext->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
mFBOTextureTarget,
mBackBufferTexture,
0);
NS_ASSERTION(mGLContext->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER) ==
LOCAL_GL_FRAMEBUFFER_COMPLETE, "Error setting up framebuffer.");
mBackBufferSize.width = aWidth;
mBackBufferSize.height = aHeight;
}
void
LayerManagerOGL::CopyToTarget()
{
nsIntRect rect;
mWidget->GetBounds(rect);
GLint width = rect.width;
GLint height = rect.height;
if ((PRInt64(width) * PRInt64(height) * PRInt64(4)) > PR_INT32_MAX) {
NS_ERROR("Widget size too big - integer overflow!");
return;
}
nsRefPtr<gfxImageSurface> imageSurface =
new gfxImageSurface(gfxIntSize(width, height),
gfxASurface::ImageFormatARGB32);
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER,
mBackBufferFBO);
#ifndef USE_GLES2
// GLES2 promises that binding to any custom FBO will attach
// to GL_COLOR_ATTACHMENT0 attachment point.
mGLContext->fReadBuffer(LOCAL_GL_COLOR_ATTACHMENT0);
#endif
GLenum format = LOCAL_GL_RGBA;
if (mHasBGRA)
format = LOCAL_GL_BGRA;
NS_ASSERTION(imageSurface->Stride() == width * 4,
"Image Surfaces being created with weird stride!");
PRUint32 currentPackAlignment = 0;
mGLContext->fGetIntegerv(LOCAL_GL_PACK_ALIGNMENT, (GLint*)&currentPackAlignment);
if (currentPackAlignment != 4) {
mGLContext->fPixelStorei(LOCAL_GL_PACK_ALIGNMENT, 4);
}
mGLContext->fFinish();
mGLContext->fReadPixels(0, 0,
width, height,
format,
LOCAL_GL_UNSIGNED_BYTE,
imageSurface->Data());
if (currentPackAlignment != 4) {
mGLContext->fPixelStorei(LOCAL_GL_PACK_ALIGNMENT, currentPackAlignment);
}
if (!mHasBGRA) {
// need to swap B and R bytes
for (int j = 0; j < height; ++j) {
PRUint32 *row = (PRUint32*) (imageSurface->Data() + imageSurface->Stride() * j);
for (int i = 0; i < width; ++i) {
*row = (*row & 0xff00ff00) | ((*row & 0xff) << 16) | ((*row & 0xff0000) >> 16);
row++;
}
}
}
mTarget->SetOperator(gfxContext::OPERATOR_OVER);
mTarget->SetSource(imageSurface);
mTarget->Paint();
}
LayerManagerOGL::ProgramType LayerManagerOGL::sLayerProgramTypes[] = {
gl::RGBALayerProgramType,
gl::BGRALayerProgramType,
gl::RGBXLayerProgramType,
gl::BGRXLayerProgramType,
gl::RGBARectLayerProgramType,
gl::ColorLayerProgramType,
gl::YCbCrLayerProgramType,
gl::ComponentAlphaPass1ProgramType,
gl::ComponentAlphaPass2ProgramType
};
#define FOR_EACH_LAYER_PROGRAM(vname) \
for (size_t lpindex = 0; \
lpindex < NS_ARRAY_LENGTH(sLayerProgramTypes); \
++lpindex) \
{ \
LayerProgram *vname = static_cast<LayerProgram*> \
(mPrograms[sLayerProgramTypes[lpindex]]); \
do
#define FOR_EACH_LAYER_PROGRAM_END \
while (0); \
} \
void
LayerManagerOGL::SetLayerProgramProjectionMatrix(const gfx3DMatrix& aMatrix)
{
FOR_EACH_LAYER_PROGRAM(lp) {
lp->Activate();
lp->SetProjectionMatrix(aMatrix);
} FOR_EACH_LAYER_PROGRAM_END
}
void
LayerManagerOGL::CreateFBOWithTexture(const nsIntRect& aRect, InitMode aInit,
GLuint *aFBO, GLuint *aTexture)
{
GLuint tex, fbo;
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
mGLContext->fGenTextures(1, &tex);
mGLContext->fBindTexture(mFBOTextureTarget, tex);
if (aInit == InitModeCopy) {
mGLContext->fCopyTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.x, aRect.y,
aRect.width, aRect.height,
0);
} else {
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.width, aRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
NULL);
}
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MIN_FILTER,
LOCAL_GL_LINEAR);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_MAG_FILTER,
LOCAL_GL_LINEAR);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_S,
LOCAL_GL_CLAMP_TO_EDGE);
mGLContext->fTexParameteri(mFBOTextureTarget, LOCAL_GL_TEXTURE_WRAP_T,
LOCAL_GL_CLAMP_TO_EDGE);
mGLContext->fBindTexture(mFBOTextureTarget, 0);
mGLContext->fGenFramebuffers(1, &fbo);
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
mGLContext->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
mFBOTextureTarget,
tex,
0);
NS_ASSERTION(mGLContext->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER) ==
LOCAL_GL_FRAMEBUFFER_COMPLETE, "Error setting up framebuffer.");
if (aInit == InitModeClear) {
mGLContext->fClearColor(0.0, 0.0, 0.0, 0.0);
mGLContext->fClear(LOCAL_GL_COLOR_BUFFER_BIT);
}
*aFBO = fbo;
*aTexture = tex;
DEBUG_GL_ERROR_CHECK(gl());
}
void LayerOGL::ApplyFilter(gfxPattern::GraphicsFilter aFilter)
{
if (aFilter == gfxPattern::FILTER_NEAREST) {
gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_NEAREST);
gl()->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_NEAREST);
} else {
if (aFilter != gfxPattern::FILTER_GOOD) {
NS_WARNING("Unsupported filter type!");
}
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);
}
}
#ifdef MOZ_IPC
already_AddRefed<ShadowThebesLayer>
LayerManagerOGL::CreateShadowThebesLayer()
{
if (LayerManagerOGL::mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
return nsRefPtr<ShadowThebesLayerOGL>(new ShadowThebesLayerOGL(this)).forget();
}
already_AddRefed<ShadowContainerLayer>
LayerManagerOGL::CreateShadowContainerLayer()
{
if (LayerManagerOGL::mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
return nsRefPtr<ShadowContainerLayerOGL>(new ShadowContainerLayerOGL(this)).forget();
}
already_AddRefed<ShadowImageLayer>
LayerManagerOGL::CreateShadowImageLayer()
{
if (LayerManagerOGL::mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
return nsRefPtr<ShadowImageLayerOGL>(new ShadowImageLayerOGL(this)).forget();
}
already_AddRefed<ShadowColorLayer>
LayerManagerOGL::CreateShadowColorLayer()
{
if (LayerManagerOGL::mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
return nsRefPtr<ShadowColorLayerOGL>(new ShadowColorLayerOGL(this)).forget();
}
already_AddRefed<ShadowCanvasLayer>
LayerManagerOGL::CreateShadowCanvasLayer()
{
if (LayerManagerOGL::mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return nsnull;
}
return nsRefPtr<ShadowCanvasLayerOGL>(new ShadowCanvasLayerOGL(this)).forget();
}
#else
already_AddRefed<ShadowThebesLayer>
LayerManagerOGL::CreateShadowThebesLayer() { return nsnull; }
already_AddRefed<ShadowContainerLayer>
LayerManagerOGL::CreateShadowContainerLayer() { return nsnull; }
already_AddRefed<ShadowImageLayer>
LayerManagerOGL::CreateShadowImageLayer() { return nsnull; }
already_AddRefed<ShadowColorLayer>
LayerManagerOGL::CreateShadowColorLayer() { return nsnull; }
already_AddRefed<ShadowCanvasLayer>
LayerManagerOGL::CreateShadowCanvasLayer() { return nsnull; }
#endif // MOZ_IPC
} /* layers */
} /* mozilla */
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