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

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 "CompositorOGL.h"
#include <stddef.h> // for size_t
#include <stdint.h> // for uint32_t, uint8_t
#include <stdlib.h> // for free, malloc
#include "GLContextProvider.h" // for GLContextProvider
#include "GLContext.h" // for GLContext
#include "GLUploadHelpers.h"
#include "Layers.h" // for WriteSnapshotToDumpFile
#include "LayerScope.h" // for LayerScope
#include "gfx2DGlue.h" // for ThebesFilter
#include "gfx3DMatrix.h" // for gfx3DMatrix
#include "gfxCrashReporterUtils.h" // for ScopedGfxFeatureReporter
#include "gfxImageSurface.h" // for gfxImageSurface
#include "gfxMatrix.h" // for gfxMatrix
#include "GraphicsFilter.h" // for GraphicsFilter
#include "gfxPlatform.h" // for gfxPlatform
#include "gfxPrefs.h" // for gfxPrefs
#include "gfxRect.h" // for gfxRect
#include "gfxUtils.h" // for NextPowerOfTwo, gfxUtils, etc
#include "mozilla/ArrayUtils.h" // for ArrayLength
#include "mozilla/Preferences.h" // for Preferences
#include "mozilla/gfx/BasePoint.h" // for BasePoint
#include "mozilla/gfx/Matrix.h" // for Matrix4x4, Matrix
#include "mozilla/layers/LayerManagerComposite.h" // for LayerComposite, etc
#include "mozilla/layers/CompositingRenderTargetOGL.h"
#include "mozilla/layers/Effects.h" // for EffectChain, TexturedEffect, etc
#include "mozilla/layers/TextureHost.h" // for TextureSource, etc
#include "mozilla/layers/TextureHostOGL.h" // for TextureSourceOGL, etc
#include "mozilla/mozalloc.h" // for operator delete, etc
#include "nsAString.h"
#include "nsIConsoleService.h" // for nsIConsoleService, etc
#include "nsIWidget.h" // for nsIWidget
#include "nsLiteralString.h" // for NS_LITERAL_STRING
#include "nsMathUtils.h" // for NS_roundf
#include "nsRect.h" // for nsIntRect
#include "nsServiceManagerUtils.h" // for do_GetService
#include "nsString.h" // for nsString, nsAutoCString, etc
#include "ScopedGLHelpers.h"
#include "GLReadTexImageHelper.h"
#include "TiledLayerBuffer.h" // for TiledLayerComposer
#include "HeapCopyOfStackArray.h"
#if MOZ_ANDROID_OMTC
#include "TexturePoolOGL.h"
#endif
#include "GeckoProfiler.h"
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
#include "libdisplay/GonkDisplay.h" // for GonkDisplay
#include <ui/Fence.h>
#endif
#define BUFFER_OFFSET(i) ((char *)nullptr + (i))
namespace mozilla {
using namespace std;
using namespace gfx;
namespace layers {
using namespace mozilla::gl;
static inline IntSize ns2gfxSize(const nsIntSize& s) {
return IntSize(s.width, s.height);
}
static void
BindMaskForProgram(ShaderProgramOGL* aProgram, TextureSourceOGL* aSourceMask,
GLenum aTexUnit, const gfx::Matrix4x4& aTransform)
{
MOZ_ASSERT(LOCAL_GL_TEXTURE0 <= aTexUnit && aTexUnit <= LOCAL_GL_TEXTURE31);
aSourceMask->BindTexture(aTexUnit, gfx::Filter::LINEAR);
aProgram->SetMaskTextureUnit(aTexUnit - LOCAL_GL_TEXTURE0);
aProgram->SetMaskLayerTransform(aTransform);
}
CompositorOGL::CompositorOGL(nsIWidget *aWidget, int aSurfaceWidth,
int aSurfaceHeight, bool aUseExternalSurfaceSize)
: mWidget(aWidget)
, mWidgetSize(-1, -1)
, mSurfaceSize(aSurfaceWidth, aSurfaceHeight)
, mHasBGRA(0)
, mUseExternalSurfaceSize(aUseExternalSurfaceSize)
, mFrameInProgress(false)
, mDestroyed(false)
, mHeight(0)
{
MOZ_COUNT_CTOR(CompositorOGL);
SetBackend(LayersBackend::LAYERS_OPENGL);
}
CompositorOGL::~CompositorOGL()
{
MOZ_COUNT_DTOR(CompositorOGL);
Destroy();
}
already_AddRefed<mozilla::gl::GLContext>
CompositorOGL::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 CompositorOGL context");
}
return context.forget();
}
void
CompositorOGL::Destroy()
{
if (gl() && gl()->MakeCurrent()) {
mVBOs.Flush(gl());
}
if (mTexturePool) {
mTexturePool->Clear();
mTexturePool = nullptr;
}
if (!mDestroyed) {
mDestroyed = true;
CleanupResources();
}
}
void
CompositorOGL::CleanupResources()
{
if (!mGLContext)
return;
nsRefPtr<GLContext> ctx = mGLContext->GetSharedContext();
if (!ctx) {
ctx = mGLContext;
}
for (std::map<ShaderConfigOGL, ShaderProgramOGL *>::iterator iter = mPrograms.begin();
iter != mPrograms.end();
iter++) {
delete iter->second;
}
mPrograms.clear();
if (!ctx->MakeCurrent()) {
mQuadVBO = 0;
mGLContext = nullptr;
return;
}
ctx->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
if (mQuadVBO) {
ctx->fDeleteBuffers(1, &mQuadVBO);
mQuadVBO = 0;
}
mGLContext = nullptr;
}
bool
CompositorOGL::Initialize()
{
ScopedGfxFeatureReporter reporter("GL Layers", true);
// Do not allow double initialization
NS_ABORT_IF_FALSE(mGLContext == nullptr, "Don't reinitialize CompositorOGL");
mGLContext = CreateContext();
#ifdef MOZ_WIDGET_ANDROID
if (!mGLContext)
NS_RUNTIMEABORT("We need a context on Android");
#endif
if (!mGLContext)
return false;
MakeCurrent();
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);
// initialise a common shader to check that we can actually compile a shader
RefPtr<EffectSolidColor> effect = new EffectSolidColor(Color(0, 0, 0, 0));
ShaderConfigOGL config = GetShaderConfigFor(effect);
if (!GetShaderProgramFor(config)) {
return false;
}
if (mGLContext->WorkAroundDriverBugs()) {
/**
* We'll test the ability here to bind NPOT textures to a framebuffer, if
* this fails we'll try ARB_texture_rectangle.
*/
GLenum textureTargets[] = {
LOCAL_GL_TEXTURE_2D,
LOCAL_GL_NONE
};
if (!mGLContext->IsGLES()) {
// No TEXTURE_RECTANGLE_ARB available on ES2
textureTargets[1] = LOCAL_GL_TEXTURE_RECTANGLE_ARB;
}
mFBOTextureTarget = LOCAL_GL_NONE;
GLuint testFBO = 0;
mGLContext->fGenFramebuffers(1, &testFBO);
GLuint testTexture = 0;
for (uint32_t i = 0; i < ArrayLength(textureTargets); i++) {
GLenum target = textureTargets[i];
if (!target)
continue;
mGLContext->fGenTextures(1, &testTexture);
mGLContext->fBindTexture(target, testTexture);
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,
nullptr);
// unbind this texture, in preparation for binding it to the FBO
mGLContext->fBindTexture(target, 0);
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, testFBO);
mGLContext->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER,
LOCAL_GL_COLOR_ATTACHMENT0,
target,
testTexture,
0);
if (mGLContext->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER) ==
LOCAL_GL_FRAMEBUFFER_COMPLETE)
{
mFBOTextureTarget = target;
mGLContext->fDeleteTextures(1, &testTexture);
break;
}
mGLContext->fDeleteTextures(1, &testTexture);
}
if (testFBO) {
mGLContext->fDeleteFramebuffers(1, &testFBO);
}
if (mFBOTextureTarget == LOCAL_GL_NONE) {
/* Unable to find a texture target that works with FBOs and NPOT textures */
return false;
}
} else {
// not trying to work around driver bugs, so TEXTURE_2D should just work
mFBOTextureTarget = LOCAL_GL_TEXTURE_2D;
}
// back to default framebuffer, to avoid confusion
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;
}
/* 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,
};
HeapCopyOfStackArray<GLfloat> verticesOnHeap(vertices);
mGLContext->fBufferData(LOCAL_GL_ARRAY_BUFFER,
verticesOnHeap.ByteLength(),
verticesOnHeap.Data(),
LOCAL_GL_STATIC_DRAW);
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
nsCOMPtr<nsIConsoleService>
console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (console) {
nsString msg;
msg +=
NS_LITERAL_STRING("OpenGL compositor 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());
}
reporter.SetSuccessful();
return true;
}
static GLfloat
WrapTexCoord(GLfloat v)
{
// fmodf gives negative results for negative numbers;
// that is, fmodf(0.75, 1.0) == 0.75, but
// fmodf(-0.75, 1.0) == -0.75. For the negative case,
// the result we need is 0.25, so we add 1.0f.
if (v < 0.0f) {
return 1.0f + fmodf(v, 1.0f);
}
return fmodf(v, 1.0f);
}
static void
SetRects(int n,
Rect* aLayerRects,
Rect* aTextureRects,
GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1,
GLfloat tx0, GLfloat ty0, GLfloat tx1, GLfloat ty1,
bool flip_y /* = false */)
{
if (flip_y) {
std::swap(ty0, ty1);
}
aLayerRects[n] = Rect(x0, y0, x1 - x0, y1 - y0);
aTextureRects[n] = Rect(tx0, ty0, tx1 - tx0, ty1 - ty0);
}
static int
DecomposeIntoNoRepeatRects(const Rect& aRect,
const Rect& aTexCoordRect,
Rect* aLayerRects,
Rect* aTextureRects)
{
Rect texCoordRect = aTexCoordRect;
// If the texture should be flipped, it will have negative height. Detect that
// here and compensate for it. We will flip each rect as we emit it.
bool flipped = false;
if (texCoordRect.height < 0) {
flipped = true;
texCoordRect.y = texCoordRect.YMost();
texCoordRect.height = -texCoordRect.height;
}
Point tl = texCoordRect.TopLeft();
Point br = texCoordRect.BottomRight();
// Chen check if we wrap in either the x or y axis; if we do,
// then also use fmod to figure out the "true" non-wrapping
// texture coordinates.
bool xwrap = false, ywrap = false;
if (texCoordRect.x < 0 ||
texCoordRect.x > 1.0f ||
texCoordRect.XMost() < 0 ||
texCoordRect.XMost() > 1.0f) {
xwrap = true;
tl = Point(WrapTexCoord(tl.x), tl.y);
br = Point(WrapTexCoord(br.x), br.y);
}
if (texCoordRect.y < 0 ||
texCoordRect.y > 1.0f ||
texCoordRect.YMost() < 0 ||
texCoordRect.YMost() > 1.0f) {
ywrap = true;
tl = Point(tl.x, WrapTexCoord(tl.y));
br = Point(br.x, WrapTexCoord(br.y));
}
NS_ASSERTION(tl.x >= 0.0f && tl.x <= 1.0f &&
tl.y >= 0.0f && tl.y <= 1.0f &&
br.x >= 0.0f && br.x <= 1.0f &&
br.y >= 0.0f && br.y <= 1.0f,
"Somehow generated invalid texture coordinates");
// If xwrap is false, the texture will be sampled from tl.x
// .. br.x. If xwrap is true, then it will be split into tl.x
// .. 1.0, and 0.0 .. br.x. Same for the Y axis. The
// destination rectangle is also split appropriately, according
// to the calculated xmid/ymid values.
// There isn't a 1:1 mapping between tex coords and destination coords;
// when computing midpoints, we have to take that into account. We
// need to map the texture coords, which are (in the wrap case):
// |tl->1| and |0->br| to the |0->1| range of the vertex coords. So
// we have the length (1-tl)+(br) that needs to map into 0->1.
// These are only valid if there is wrap involved, they won't be used
// otherwise.
GLfloat xlen = (1.0f - tl.x) + br.x;
GLfloat ylen = (1.0f - tl.y) + br.y;
NS_ASSERTION(!xwrap || xlen > 0.0f, "xlen isn't > 0, what's going on?");
NS_ASSERTION(!ywrap || ylen > 0.0f, "ylen isn't > 0, what's going on?");
if (!xwrap && !ywrap) {
SetRects(0, aLayerRects, aTextureRects,
aRect.x, aRect.y, aRect.XMost(), aRect.YMost(),
tl.x, tl.y, br.x, br.y,
flipped);
return 1;
}
GLfloat xmid = aRect.x + (1.0f - tl.x) / xlen * aRect.width;
GLfloat ymid = aRect.y + (1.0f - tl.y) / ylen * aRect.height;
if (!xwrap && ywrap) {
SetRects(0, aLayerRects, aTextureRects,
aRect.x, aRect.y, aRect.XMost(), ymid,
tl.x, tl.y, br.x, 1.0f,
flipped);
SetRects(1, aLayerRects, aTextureRects,
aRect.x, ymid, aRect.XMost(), aRect.YMost(),
tl.x, 0.0f, br.x, br.y,
flipped);
return 2;
}
if (xwrap && !ywrap) {
SetRects(0, aLayerRects, aTextureRects,
aRect.x, aRect.y, xmid, aRect.YMost(),
tl.x, tl.y, 1.0f, br.y,
flipped);
SetRects(1, aLayerRects, aTextureRects,
xmid, aRect.y, aRect.XMost(), aRect.YMost(),
0.0f, tl.y, br.x, br.y,
flipped);
return 2;
}
SetRects(0, aLayerRects, aTextureRects,
aRect.x, aRect.y, xmid, ymid,
tl.x, tl.y, 1.0f, 1.0f,
flipped);
SetRects(1, aLayerRects, aTextureRects,
xmid, aRect.y, aRect.XMost(), ymid,
0.0f, tl.y, br.x, 1.0f,
flipped);
SetRects(2, aLayerRects, aTextureRects,
aRect.x, ymid, xmid, aRect.YMost(),
tl.x, 0.0f, 1.0f, br.y,
flipped);
SetRects(3, aLayerRects, aTextureRects,
xmid, ymid, aRect.XMost(), aRect.YMost(),
0.0f, 0.0f, br.x, br.y,
flipped);
return 4;
}
// |aRect| is the rectangle we want to draw to. We will draw it with
// up to 4 draw commands if necessary to avoid wrapping.
// |aTexCoordRect| is the rectangle from the texture that we want to
// draw using the given program.
// |aTexture| is the texture we are drawing. Its actual size can be
// larger than the rectangle given by |texCoordRect|.
void
CompositorOGL::BindAndDrawQuadWithTextureRect(ShaderProgramOGL *aProg,
const Rect& aRect,
const Rect& aTexCoordRect,
TextureSource *aTexture)
{
Rect layerRects[4];
Rect textureRects[4];
int rects = DecomposeIntoNoRepeatRects(aRect,
aTexCoordRect,
layerRects,
textureRects);
for (int n = 0; n < rects; ++n) {
BindAndDrawQuad(aProg, layerRects[n], textureRects[n]);
}
}
void
CompositorOGL::PrepareViewport(const gfx::IntSize& aSize,
const Matrix& aWorldTransform)
{
// Set the viewport correctly.
mGLContext->fViewport(0, 0, aSize.width, aSize.height);
mHeight = aSize.height;
// We flip 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 keep track of whether the window size changed, so we could skip
// this update if it hadn't changed since the last call. We will need to
// track changes to aTransformPolicy and aWorldTransform for this to work
// though.
// Matrix to transform (0, 0, aWidth, aHeight) to viewport space (-1.0, 1.0,
// 2, 2) and flip the contents.
Matrix viewMatrix;
viewMatrix.Translate(-1.0, 1.0);
viewMatrix.Scale(2.0f / float(aSize.width), 2.0f / float(aSize.height));
viewMatrix.Scale(1.0f, -1.0f);
if (!mTarget) {
viewMatrix.Translate(mRenderOffset.x, mRenderOffset.y);
}
viewMatrix = aWorldTransform * viewMatrix;
Matrix4x4 matrix3d = Matrix4x4::From2D(viewMatrix);
matrix3d._33 = 0.0f;
mProjMatrix = matrix3d;
}
TemporaryRef<CompositingRenderTarget>
CompositorOGL::CreateRenderTarget(const IntRect &aRect, SurfaceInitMode aInit)
{
GLuint tex = 0;
GLuint fbo = 0;
CreateFBOWithTexture(aRect, false, 0, &fbo, &tex);
RefPtr<CompositingRenderTargetOGL> surface
= new CompositingRenderTargetOGL(this, aRect.TopLeft(), tex, fbo);
surface->Initialize(aRect.Size(), mFBOTextureTarget, aInit);
return surface.forget();
}
TemporaryRef<CompositingRenderTarget>
CompositorOGL::CreateRenderTargetFromSource(const IntRect &aRect,
const CompositingRenderTarget *aSource,
const IntPoint &aSourcePoint)
{
GLuint tex = 0;
GLuint fbo = 0;
const CompositingRenderTargetOGL* sourceSurface
= static_cast<const CompositingRenderTargetOGL*>(aSource);
IntRect sourceRect(aSourcePoint, aRect.Size());
if (aSource) {
CreateFBOWithTexture(sourceRect, true, sourceSurface->GetFBO(),
&fbo, &tex);
} else {
CreateFBOWithTexture(sourceRect, true, 0,
&fbo, &tex);
}
RefPtr<CompositingRenderTargetOGL> surface
= new CompositingRenderTargetOGL(this, aRect.TopLeft(), tex, fbo);
surface->Initialize(aRect.Size(),
mFBOTextureTarget,
INIT_MODE_NONE);
return surface.forget();
}
void
CompositorOGL::SetRenderTarget(CompositingRenderTarget *aSurface)
{
MOZ_ASSERT(aSurface);
CompositingRenderTargetOGL* surface
= static_cast<CompositingRenderTargetOGL*>(aSurface);
if (mCurrentRenderTarget != surface) {
surface->BindRenderTarget();
mCurrentRenderTarget = surface;
}
}
CompositingRenderTarget*
CompositorOGL::GetCurrentRenderTarget() const
{
return mCurrentRenderTarget;
}
static GLenum
GetFrameBufferInternalFormat(GLContext* gl,
GLuint aFrameBuffer,
nsIWidget* aWidget)
{
if (aFrameBuffer == 0) { // default framebuffer
return aWidget->GetGLFrameBufferFormat();
}
return LOCAL_GL_RGBA;
}
/*
* Returns a size that is larger than and closest to aSize where both
* width and height are powers of two.
* If the OpenGL setup is capable of using non-POT textures, then it
* will just return aSize.
*/
static IntSize
CalculatePOTSize(const IntSize& aSize, GLContext* gl)
{
if (CanUploadNonPowerOfTwo(gl))
return aSize;
return IntSize(NextPowerOfTwo(aSize.width), NextPowerOfTwo(aSize.height));
}
void
CompositorOGL::ClearRect(const gfx::Rect& aRect)
{
// Map aRect to OGL coordinates, origin:bottom-left
GLint y = mHeight - (aRect.y + aRect.height);
ScopedGLState scopedScissorTestState(mGLContext, LOCAL_GL_SCISSOR_TEST, true);
ScopedScissorRect autoScissorRect(mGLContext, aRect.x, y, aRect.width, aRect.height);
mGLContext->fClearColor(0.0, 0.0, 0.0, 0.0);
mGLContext->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
}
void
CompositorOGL::BeginFrame(const nsIntRegion& aInvalidRegion,
const Rect *aClipRectIn,
const gfx::Matrix& aTransform,
const Rect& aRenderBounds,
Rect *aClipRectOut,
Rect *aRenderBoundsOut)
{
PROFILER_LABEL("CompositorOGL", "BeginFrame");
MOZ_ASSERT(!mFrameInProgress, "frame still in progress (should have called EndFrame or AbortFrame");
LayerScope::BeginFrame(mGLContext, PR_Now());
mVBOs.Reset();
mFrameInProgress = true;
gfx::Rect rect;
if (mUseExternalSurfaceSize) {
rect = gfx::Rect(0, 0, mSurfaceSize.width, mSurfaceSize.height);
} else {
rect = gfx::Rect(aRenderBounds.x, aRenderBounds.y, aRenderBounds.width, aRenderBounds.height);
// If render bounds is not updated explicitly, try to infer it from widget
if (rect.width == 0 || rect.height == 0) {
// FIXME/bug XXXXXX this races with rotation changes on the main
// thread, and undoes all the care we take with layers txns being
// sent atomically with rotation changes
nsIntRect intRect;
mWidget->GetClientBounds(intRect);
rect = gfx::Rect(0, 0, intRect.width, intRect.height);
}
}
rect = aTransform.TransformBounds(rect);
if (aRenderBoundsOut) {
*aRenderBoundsOut = 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(ForceMakeCurrent);
mWidgetSize.width = width;
mWidgetSize.height = height;
} else {
MakeCurrent();
}
mPixelsPerFrame = width * height;
mPixelsFilled = 0;
#if MOZ_ANDROID_OMTC
TexturePoolOGL::Fill(gl());
#endif
mCurrentRenderTarget = CompositingRenderTargetOGL::RenderTargetForWindow(this,
IntSize(width, height),
aTransform);
mCurrentRenderTarget->BindRenderTarget();
#ifdef DEBUG
mWindowRenderTarget = mCurrentRenderTarget;
#endif
// 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);
mGLContext->fEnable(LOCAL_GL_SCISSOR_TEST);
if (aClipRectOut && !aClipRectIn) {
aClipRectOut->SetRect(0, 0, width, height);
}
// If the Android compositor is being used, this clear will be done in
// DrawWindowUnderlay. Make sure the bits used here match up with those used
// in mobile/android/base/gfx/LayerRenderer.java
#ifndef MOZ_ANDROID_OMTC
mGLContext->fClearColor(0.0, 0.0, 0.0, 0.0);
mGLContext->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
#endif
}
void
CompositorOGL::CreateFBOWithTexture(const IntRect& aRect, bool aCopyFromSource,
GLuint aSourceFrameBuffer,
GLuint *aFBO, GLuint *aTexture)
{
GLuint tex, fbo;
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
mGLContext->fGenTextures(1, &tex);
mGLContext->fBindTexture(mFBOTextureTarget, tex);
if (aCopyFromSource) {
GLuint curFBO = mCurrentRenderTarget->GetFBO();
if (curFBO != aSourceFrameBuffer) {
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, aSourceFrameBuffer);
}
// We're going to create an RGBA temporary fbo. But to
// CopyTexImage() from the current framebuffer, the framebuffer's
// format has to be compatible with the new texture's. So we
// check the format of the framebuffer here and take a slow path
// if it's incompatible.
GLenum format =
GetFrameBufferInternalFormat(gl(), aSourceFrameBuffer, mWidget);
bool isFormatCompatibleWithRGBA
= gl()->IsGLES() ? (format == LOCAL_GL_RGBA)
: true;
if (isFormatCompatibleWithRGBA) {
mGLContext->fCopyTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.x, FlipY(aRect.y + aRect.height),
aRect.width, aRect.height,
0);
} else {
// Curses, incompatible formats. Take a slow path.
// RGBA
size_t bufferSize = aRect.width * aRect.height * 4;
nsAutoArrayPtr<uint8_t> buf(new uint8_t[bufferSize]);
mGLContext->fReadPixels(aRect.x, aRect.y,
aRect.width, aRect.height,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
buf);
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.width, aRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
buf);
}
GLenum error = mGLContext->GetAndClearError();
if (error != LOCAL_GL_NO_ERROR) {
nsAutoCString msg;
msg.AppendPrintf("Texture initialization failed! -- error 0x%x, Source %d, Source format %d, RGBA Compat %d",
error, aSourceFrameBuffer, format, isFormatCompatibleWithRGBA);
NS_ERROR(msg.get());
}
} else {
mGLContext->fTexImage2D(mFBOTextureTarget,
0,
LOCAL_GL_RGBA,
aRect.width, aRect.height,
0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
nullptr);
}
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);
*aFBO = fbo;
*aTexture = tex;
}
ShaderConfigOGL
CompositorOGL::GetShaderConfigFor(Effect *aEffect,
MaskType aMask,
gfx::CompositionOp aOp) const
{
ShaderConfigOGL config;
switch(aEffect->mType) {
case EffectTypes::SOLID_COLOR:
config.SetRenderColor(true);
break;
case EffectTypes::YCBCR:
config.SetYCbCr(true);
break;
case EffectTypes::COMPONENT_ALPHA:
{
config.SetComponentAlpha(true);
EffectComponentAlpha* effectComponentAlpha =
static_cast<EffectComponentAlpha*>(aEffect);
gfx::SurfaceFormat format = effectComponentAlpha->mOnWhite->GetFormat();
config.SetRBSwap(format == gfx::SurfaceFormat::B8G8R8A8 ||
format == gfx::SurfaceFormat::B8G8R8X8);
break;
}
case EffectTypes::RENDER_TARGET:
config.SetTextureTarget(mFBOTextureTarget);
break;
default:
{
MOZ_ASSERT(aEffect->mType == EffectTypes::RGB);
TexturedEffect* texturedEffect =
static_cast<TexturedEffect*>(aEffect);
TextureSourceOGL* source = texturedEffect->mTexture->AsSourceOGL();
MOZ_ASSERT_IF(source->GetTextureTarget() == LOCAL_GL_TEXTURE_EXTERNAL,
source->GetFormat() == gfx::SurfaceFormat::R8G8B8A8);
MOZ_ASSERT_IF(source->GetTextureTarget() == LOCAL_GL_TEXTURE_RECTANGLE_ARB,
source->GetFormat() == gfx::SurfaceFormat::R8G8B8A8 ||
source->GetFormat() == gfx::SurfaceFormat::R8G8B8X8 ||
source->GetFormat() == gfx::SurfaceFormat::R5G6B5);
config = ShaderConfigFromTargetAndFormat(source->GetTextureTarget(),
source->GetFormat());
if (aOp == gfx::CompositionOp::OP_MULTIPLY &&
!texturedEffect->mPremultiplied) {
// We can do these blend modes just using glBlendFunc but we need the data
// to be premultiplied first.
config.SetPremultiply(true);
}
break;
}
}
config.SetMask2D(aMask == MaskType::Mask2d);
config.SetMask3D(aMask == MaskType::Mask3d);
return config;
}
ShaderProgramOGL*
CompositorOGL::GetShaderProgramFor(const ShaderConfigOGL &aConfig)
{
std::map<ShaderConfigOGL, ShaderProgramOGL *>::iterator iter = mPrograms.find(aConfig);
if (iter != mPrograms.end())
return iter->second;
ProgramProfileOGL profile = ProgramProfileOGL::GetProfileFor(aConfig);
ShaderProgramOGL *shader = new ShaderProgramOGL(gl(), profile);
if (!shader->Initialize()) {
delete shader;
return nullptr;
}
mPrograms[aConfig] = shader;
return shader;
}
static bool SetBlendMode(GLContext* aGL, gfx::CompositionOp aBlendMode, bool aIsPremultiplied = true)
{
if (aBlendMode == gfx::CompositionOp::OP_OVER && aIsPremultiplied) {
return false;
}
GLenum srcBlend;
GLenum dstBlend;
switch (aBlendMode) {
case gfx::CompositionOp::OP_OVER:
MOZ_ASSERT(!aIsPremultiplied);
srcBlend = LOCAL_GL_SRC_ALPHA;
dstBlend = LOCAL_GL_ONE_MINUS_SRC_ALPHA;
break;
case gfx::CompositionOp::OP_SCREEN:
srcBlend = aIsPremultiplied ? LOCAL_GL_ONE : LOCAL_GL_SRC_ALPHA;
dstBlend = LOCAL_GL_ONE_MINUS_SRC_COLOR;
break;
case gfx::CompositionOp::OP_MULTIPLY:
// If the source data was un-premultiplied we should have already
// asked the fragment shader to fix that.
srcBlend = LOCAL_GL_DST_COLOR;
dstBlend = LOCAL_GL_ONE_MINUS_SRC_ALPHA;
break;
default:
MOZ_ASSERT_UNREACHABLE("Unsupported blend mode!");
return false;
}
aGL->fBlendFuncSeparate(srcBlend, dstBlend,
LOCAL_GL_ONE, LOCAL_GL_ONE);
return true;
}
void
CompositorOGL::DrawQuad(const Rect& aRect,
const Rect& aClipRect,
const EffectChain &aEffectChain,
Float aOpacity,
const gfx::Matrix4x4 &aTransform)
{
PROFILER_LABEL("CompositorOGL", "DrawQuad");
MOZ_ASSERT(mFrameInProgress, "frame not started");
Rect clipRect = aClipRect;
if (!mTarget) {
clipRect.MoveBy(mRenderOffset.x, mRenderOffset.y);
}
IntRect intClipRect;
clipRect.ToIntRect(&intClipRect);
gl()->fScissor(intClipRect.x, FlipY(intClipRect.y + intClipRect.height),
intClipRect.width, intClipRect.height);
LayerScope::SendEffectChain(mGLContext, aEffectChain,
aRect.width, aRect.height);
MaskType maskType;
EffectMask* effectMask;
TextureSourceOGL* sourceMask = nullptr;
gfx::Matrix4x4 maskQuadTransform;
if (aEffectChain.mSecondaryEffects[EffectTypes::MASK]) {
effectMask = static_cast<EffectMask*>(aEffectChain.mSecondaryEffects[EffectTypes::MASK].get());
sourceMask = effectMask->mMaskTexture->AsSourceOGL();
// NS_ASSERTION(textureMask->IsAlpha(),
// "OpenGL mask layers must be backed by alpha surfaces");
// We're assuming that the gl backend won't cheat and use NPOT
// textures when glContext says it can't (which seems to happen
// on a mac when you force POT textures)
IntSize maskSize = CalculatePOTSize(effectMask->mSize, mGLContext);
const gfx::Matrix4x4& maskTransform = effectMask->mMaskTransform;
NS_ASSERTION(maskTransform.Is2D(), "How did we end up with a 3D transform here?!");
Rect bounds = Rect(Point(), Size(maskSize));
bounds = maskTransform.As2D().TransformBounds(bounds);
maskQuadTransform._11 = 1.0f/bounds.width;
maskQuadTransform._22 = 1.0f/bounds.height;
maskQuadTransform._41 = float(-bounds.x)/bounds.width;
maskQuadTransform._42 = float(-bounds.y)/bounds.height;
maskType = effectMask->mIs3D
? MaskType::Mask3d
: MaskType::Mask2d;
} else {
maskType = MaskType::MaskNone;
}
mPixelsFilled += aRect.width * aRect.height;
// Determine the color if this is a color shader and fold the opacity into
// the color since color shaders don't have an opacity uniform.
Color color;
if (aEffectChain.mPrimaryEffect->mType == EffectTypes::SOLID_COLOR) {
EffectSolidColor* effectSolidColor =
static_cast<EffectSolidColor*>(aEffectChain.mPrimaryEffect.get());
color = effectSolidColor->mColor;
Float opacity = aOpacity * color.a;
color.r *= opacity;
color.g *= opacity;
color.b *= opacity;
color.a = opacity;
// We can fold opacity into the color, so no need to consider it further.
aOpacity = 1.f;
}
gfx::CompositionOp blendMode = gfx::CompositionOp::OP_OVER;
if (aEffectChain.mSecondaryEffects[EffectTypes::BLEND_MODE]) {
EffectBlendMode *blendEffect =
static_cast<EffectBlendMode*>(aEffectChain.mSecondaryEffects[EffectTypes::BLEND_MODE].get());
blendMode = blendEffect->mBlendMode;
}
ShaderConfigOGL config = GetShaderConfigFor(aEffectChain.mPrimaryEffect, maskType, blendMode);
config.SetOpacity(aOpacity != 1.f);
ShaderProgramOGL *program = GetShaderProgramFor(config);
program->Activate();
program->SetProjectionMatrix(mProjMatrix);
program->SetLayerTransform(aTransform);
IntPoint offset = mCurrentRenderTarget->GetOrigin();
program->SetRenderOffset(offset.x, offset.y);
if (aOpacity != 1.f)
program->SetLayerOpacity(aOpacity);
if (config.mFeatures & ENABLE_TEXTURE_RECT) {
TexturedEffect* texturedEffect =
static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get());
TextureSourceOGL* source = texturedEffect->mTexture->AsSourceOGL();
// This is used by IOSurface that use 0,0...w,h coordinate rather then 0,0..1,1.
program->SetTexCoordMultiplier(source->GetSize().width, source->GetSize().height);
}
bool didSetBlendMode = false;
switch (aEffectChain.mPrimaryEffect->mType) {
case EffectTypes::SOLID_COLOR: {
program->SetRenderColor(color);
if (maskType != MaskType::MaskNone) {
BindMaskForProgram(program, sourceMask, LOCAL_GL_TEXTURE0, maskQuadTransform);
}
didSetBlendMode = SetBlendMode(gl(), blendMode);
BindAndDrawQuad(program, aRect);
}
break;
case EffectTypes::RGB: {
TexturedEffect* texturedEffect =
static_cast<TexturedEffect*>(aEffectChain.mPrimaryEffect.get());
TextureSource *source = texturedEffect->mTexture;
didSetBlendMode = SetBlendMode(gl(), blendMode, texturedEffect->mPremultiplied);
gfx::Filter filter = texturedEffect->mFilter;
gfx3DMatrix textureTransform;
gfx::To3DMatrix(source->AsSourceOGL()->GetTextureTransform(), textureTransform);
#ifdef MOZ_WIDGET_ANDROID
gfxMatrix textureTransform2D;
if (filter != gfx::Filter::POINT &&
aTransform.Is2DIntegerTranslation() &&
textureTransform.Is2D(&textureTransform2D) &&
textureTransform2D.HasOnlyIntegerTranslation()) {
// On Android we encounter small resampling errors in what should be
// pixel-aligned compositing operations. This works around them. This
// code should not be needed!
filter = gfx::Filter::POINT;
}
#endif
source->AsSourceOGL()->BindTexture(LOCAL_GL_TEXTURE0, filter);
program->SetTextureUnit(0);
Matrix4x4 transform;
ToMatrix4x4(textureTransform, transform);
program->SetTextureTransform(transform);
if (maskType != MaskType::MaskNone) {
BindMaskForProgram(program, sourceMask, LOCAL_GL_TEXTURE1, maskQuadTransform);
}
BindAndDrawQuadWithTextureRect(program, aRect, texturedEffect->mTextureCoords, source);
}
break;
case EffectTypes::YCBCR: {
EffectYCbCr* effectYCbCr =
static_cast<EffectYCbCr*>(aEffectChain.mPrimaryEffect.get());
TextureSource* sourceYCbCr = effectYCbCr->mTexture;
const int Y = 0, Cb = 1, Cr = 2;
TextureSourceOGL* sourceY = sourceYCbCr->GetSubSource(Y)->AsSourceOGL();
TextureSourceOGL* sourceCb = sourceYCbCr->GetSubSource(Cb)->AsSourceOGL();
TextureSourceOGL* sourceCr = sourceYCbCr->GetSubSource(Cr)->AsSourceOGL();
if (!sourceY && !sourceCb && !sourceCr) {
NS_WARNING("Invalid layer texture.");
return;
}
sourceY->BindTexture(LOCAL_GL_TEXTURE0, effectYCbCr->mFilter);
sourceCb->BindTexture(LOCAL_GL_TEXTURE1, effectYCbCr->mFilter);
sourceCr->BindTexture(LOCAL_GL_TEXTURE2, effectYCbCr->mFilter);
program->SetYCbCrTextureUnits(Y, Cb, Cr);
program->SetTextureTransform(Matrix4x4());
if (maskType != MaskType::MaskNone) {
BindMaskForProgram(program, sourceMask, LOCAL_GL_TEXTURE3, maskQuadTransform);
}
didSetBlendMode = SetBlendMode(gl(), blendMode);
BindAndDrawQuadWithTextureRect(program,
aRect,
effectYCbCr->mTextureCoords,
sourceYCbCr->GetSubSource(Y));
}
break;
case EffectTypes::RENDER_TARGET: {
EffectRenderTarget* effectRenderTarget =
static_cast<EffectRenderTarget*>(aEffectChain.mPrimaryEffect.get());
RefPtr<CompositingRenderTargetOGL> surface
= static_cast<CompositingRenderTargetOGL*>(effectRenderTarget->mRenderTarget.get());
surface->BindTexture(LOCAL_GL_TEXTURE0, mFBOTextureTarget);
// Drawing is always flipped, but when copying between surfaces we want to avoid
// this, so apply a flip here to cancel the other one out.
Matrix transform;
transform.Translate(0.0, 1.0);
transform.Scale(1.0f, -1.0f);
program->SetTextureTransform(Matrix4x4::From2D(transform));
program->SetTextureUnit(0);
if (maskType != MaskType::MaskNone) {
sourceMask->BindTexture(LOCAL_GL_TEXTURE1, gfx::Filter::LINEAR);
program->SetMaskTextureUnit(1);
program->SetMaskLayerTransform(maskQuadTransform);
}
if (config.mFeatures & ENABLE_TEXTURE_RECT) {
// 2DRect case, get the multiplier right for a sampler2DRect
program->SetTexCoordMultiplier(aRect.width, aRect.height);
}
// Drawing is always flipped, but when copying between surfaces we want to avoid
// this. Pass true for the flip parameter to introduce a second flip
// that cancels the other one out.
didSetBlendMode = SetBlendMode(gl(), blendMode);
BindAndDrawQuad(program, aRect);
}
break;
case EffectTypes::COMPONENT_ALPHA: {
MOZ_ASSERT(gfxPrefs::ComponentAlphaEnabled());
MOZ_ASSERT(blendMode == gfx::CompositionOp::OP_OVER, "Can't support blend modes with component alpha!");
EffectComponentAlpha* effectComponentAlpha =
static_cast<EffectComponentAlpha*>(aEffectChain.mPrimaryEffect.get());
TextureSourceOGL* sourceOnWhite = effectComponentAlpha->mOnWhite->AsSourceOGL();
TextureSourceOGL* sourceOnBlack = effectComponentAlpha->mOnBlack->AsSourceOGL();
if (!sourceOnBlack->IsValid() ||
!sourceOnWhite->IsValid()) {
NS_WARNING("Invalid layer texture for component alpha");
return;
}
sourceOnBlack->BindTexture(LOCAL_GL_TEXTURE0, effectComponentAlpha->mFilter);
sourceOnWhite->BindTexture(LOCAL_GL_TEXTURE1, effectComponentAlpha->mFilter);
program->SetBlackTextureUnit(0);
program->SetWhiteTextureUnit(1);
program->SetTextureTransform(Matrix4x4());
if (maskType != MaskType::MaskNone) {
BindMaskForProgram(program, sourceMask, LOCAL_GL_TEXTURE2, maskQuadTransform);
}
// Pass 1.
gl()->fBlendFuncSeparate(LOCAL_GL_ZERO, LOCAL_GL_ONE_MINUS_SRC_COLOR,
LOCAL_GL_ONE, LOCAL_GL_ONE);
program->SetTexturePass2(false);
BindAndDrawQuadWithTextureRect(program,
aRect,
effectComponentAlpha->mTextureCoords,
effectComponentAlpha->mOnBlack);
// Pass 2.
gl()->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE,
LOCAL_GL_ONE, LOCAL_GL_ONE);
program->SetTexturePass2(true);
BindAndDrawQuadWithTextureRect(program,
aRect,
effectComponentAlpha->mTextureCoords,
effectComponentAlpha->mOnBlack);
mGLContext->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA,
LOCAL_GL_ONE, LOCAL_GL_ONE);
}
break;
default:
MOZ_ASSERT(false, "Unhandled effect type");
break;
}
if (didSetBlendMode) {
gl()->fBlendFuncSeparate(LOCAL_GL_ONE, LOCAL_GL_ONE_MINUS_SRC_ALPHA,
LOCAL_GL_ONE, LOCAL_GL_ONE);
}
// in case rendering has used some other GL context
MakeCurrent();
}
void
CompositorOGL::EndFrame()
{
PROFILER_LABEL("CompositorOGL", "EndFrame");
MOZ_ASSERT(mCurrentRenderTarget == mWindowRenderTarget, "Rendering target not properly restored");
#ifdef MOZ_DUMP_PAINTING
if (gfxUtils::sDumpPainting) {
nsIntRect rect;
if (mUseExternalSurfaceSize) {
rect = nsIntRect(0, 0, mSurfaceSize.width, mSurfaceSize.height);
} else {
mWidget->GetBounds(rect);
}
RefPtr<DrawTarget> target = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(IntSize(rect.width, rect.height), SurfaceFormat::B8G8R8A8);
CopyToTarget(target, mCurrentRenderTarget->GetTransform());
WriteSnapshotToDumpFile(this, target);
}
#endif
mFrameInProgress = false;
LayerScope::EndFrame(mGLContext);
if (mTarget) {
CopyToTarget(mTarget, mCurrentRenderTarget->GetTransform());
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
mCurrentRenderTarget = nullptr;
return;
}
mCurrentRenderTarget = nullptr;
if (mTexturePool) {
mTexturePool->EndFrame();
}
mGLContext->SwapBuffers();
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
// Unbind all textures
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, 0);
if (!mGLContext->IsGLES()) {
mGLContext->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, 0);
}
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE1);
mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, 0);
if (!mGLContext->IsGLES()) {
mGLContext->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, 0);
}
mGLContext->fActiveTexture(LOCAL_GL_TEXTURE2);
mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, 0);
if (!mGLContext->IsGLES()) {
mGLContext->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, 0);
}
}
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
void
CompositorOGL::SetFBAcquireFence(Layer* aLayer)
{
// OpenGL does not provide ReleaseFence for rendering.
// Instead use FBAcquireFence as layer buffer's ReleaseFence
// to prevent flickering and tearing.
// FBAcquireFence is FramebufferSurface's AcquireFence.
// AcquireFence will be signaled when a buffer's content is available.
// See Bug 974152.
if (!aLayer) {
return;
}
const nsIntRegion& visibleRegion = aLayer->GetEffectiveVisibleRegion();
if (visibleRegion.IsEmpty()) {
return;
}
// Set FBAcquireFence on ContainerLayer's childs
ContainerLayer* container = aLayer->AsContainerLayer();
if (container) {
for (Layer* child = container->GetFirstChild(); child; child = child->GetNextSibling()) {
SetFBAcquireFence(child);
}
return;
}
// Set FBAcquireFence as tiles' ReleaseFence on TiledLayerComposer.
TiledLayerComposer* composer = nullptr;
LayerComposite* shadow = aLayer->AsLayerComposite();
if (shadow) {
composer = shadow->GetTiledLayerComposer();
if (composer) {
composer->SetReleaseFence(new android::Fence(GetGonkDisplay()->GetPrevFBAcquireFd()));
return;
}
}
// Set FBAcquireFence as layer buffer's ReleaseFence
LayerRenderState state = aLayer->GetRenderState();
if (!state.mTexture) {
return;
}
TextureHostOGL* texture = state.mTexture->AsHostOGL();
if (!texture) {
return;
}
texture->SetReleaseFence(new android::Fence(GetGonkDisplay()->GetPrevFBAcquireFd()));
}
#else
void
CompositorOGL::SetFBAcquireFence(Layer* aLayer)
{
}
#endif
void
CompositorOGL::EndFrameForExternalComposition(const gfx::Matrix& aTransform)
{
// This lets us reftest and screenshot content rendered externally
if (mTarget) {
MakeCurrent();
CopyToTarget(mTarget, aTransform);
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
}
if (mTexturePool) {
mTexturePool->EndFrame();
}
}
void
CompositorOGL::AbortFrame()
{
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
mFrameInProgress = false;
mCurrentRenderTarget = nullptr;
if (mTexturePool) {
mTexturePool->EndFrame();
}
}
void
CompositorOGL::SetDestinationSurfaceSize(const gfx::IntSize& aSize)
{
mSurfaceSize.width = aSize.width;
mSurfaceSize.height = aSize.height;
}
void
CompositorOGL::CopyToTarget(DrawTarget *aTarget, const gfx::Matrix& aTransform)
{
IntRect rect;
if (mUseExternalSurfaceSize) {
rect = IntRect(0, 0, mSurfaceSize.width, mSurfaceSize.height);
} else {
rect = IntRect(0, 0, mWidgetSize.width, mWidgetSize.height);
}
GLint width = rect.width;
GLint height = rect.height;
if ((int64_t(width) * int64_t(height) * int64_t(4)) > INT32_MAX) {
NS_ERROR("Widget size too big - integer overflow!");
return;
}
mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
if (!mGLContext->IsGLES()) {
// GLES2 promises that binding to any custom FBO will attach
// to GL_COLOR_ATTACHMENT0 attachment point.
mGLContext->fReadBuffer(LOCAL_GL_BACK);
}
RefPtr<DataSourceSurface> source =
Factory::CreateDataSourceSurface(rect.Size(), gfx::SurfaceFormat::B8G8R8A8);
ReadPixelsIntoDataSurface(mGLContext, source);
// Map from GL space to Cairo space and reverse the world transform.
Matrix glToCairoTransform = aTransform;
glToCairoTransform.Invert();
glToCairoTransform.Scale(1.0, -1.0);
glToCairoTransform.Translate(0.0, -height);
Matrix oldMatrix = aTarget->GetTransform();
aTarget->SetTransform(glToCairoTransform);
Rect floatRect = Rect(rect.x, rect.y, rect.width, rect.height);
aTarget->DrawSurface(source, floatRect, floatRect, DrawSurfaceOptions(), DrawOptions(1.0f, CompositionOp::OP_SOURCE));
aTarget->SetTransform(oldMatrix);
aTarget->Flush();
}
void
CompositorOGL::Pause()
{
#ifdef MOZ_WIDGET_ANDROID
if (!gl() || gl()->IsDestroyed())
return;
// ReleaseSurface internally calls MakeCurrent.
gl()->ReleaseSurface();
#endif
}
bool
CompositorOGL::Resume()
{
#ifdef MOZ_WIDGET_ANDROID
if (!gl() || gl()->IsDestroyed())
return false;
// RenewSurface internally calls MakeCurrent.
return gl()->RenewSurface();
#endif
return true;
}
TemporaryRef<DataTextureSource>
CompositorOGL::CreateDataTextureSource(TextureFlags aFlags)
{
RefPtr<DataTextureSource> result =
new TextureImageTextureSourceOGL(mGLContext, aFlags);
return result;
}
bool
CompositorOGL::SupportsPartialTextureUpdate()
{
return CanUploadSubTextures(mGLContext);
}
int32_t
CompositorOGL::GetMaxTextureSize() const
{
MOZ_ASSERT(mGLContext);
GLint texSize = 0;
mGLContext->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_SIZE,
&texSize);
MOZ_ASSERT(texSize != 0);
return texSize;
}
void
CompositorOGL::MakeCurrent(MakeCurrentFlags aFlags) {
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return;
}
mGLContext->MakeCurrent(aFlags & ForceMakeCurrent);
}
void
CompositorOGL::BindQuadVBO() {
mGLContext->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mQuadVBO);
}
void
CompositorOGL::QuadVBOVerticesAttrib(GLuint aAttribIndex) {
mGLContext->fVertexAttribPointer(aAttribIndex, 2,
LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0,
(GLvoid*) QuadVBOVertexOffset());
}
void
CompositorOGL::QuadVBOTexCoordsAttrib(GLuint aAttribIndex) {
mGLContext->fVertexAttribPointer(aAttribIndex, 2,
LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0,
(GLvoid*) QuadVBOTexCoordOffset());
}
void
CompositorOGL::BindAndDrawQuad(ShaderProgramOGL *aProg,
const Rect& aLayerRect,
const Rect& aTextureRect)
{
NS_ASSERTION(aProg->HasInitialized(), "Shader program not correctly initialized");
aProg->SetLayerRect(aLayerRect);
GLuint vertAttribIndex = aProg->AttribLocation(ShaderProgramOGL::VertexCoordAttrib);
GLuint texCoordAttribIndex = aProg->AttribLocation(ShaderProgramOGL::TexCoordAttrib);
BindQuadVBO();
QuadVBOVerticesAttrib(vertAttribIndex);
if (texCoordAttribIndex != GLuint(-1)) {
QuadVBOTexCoordsAttrib(texCoordAttribIndex);
mGLContext->fEnableVertexAttribArray(texCoordAttribIndex);
aProg->SetTextureRect(aTextureRect);
}
mGLContext->fEnableVertexAttribArray(vertAttribIndex);
mGLContext->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
}
GLuint
CompositorOGL::GetTemporaryTexture(GLenum aTarget, GLenum aUnit)
{
if (!mTexturePool) {
#ifdef MOZ_WIDGET_GONK
mTexturePool = new PerFrameTexturePoolOGL(gl());
#else
mTexturePool = new PerUnitTexturePoolOGL(gl());
#endif
}
return mTexturePool->GetTexture(aTarget, aUnit);
}
GLuint
PerUnitTexturePoolOGL::GetTexture(GLenum aTarget, GLenum aTextureUnit)
{
if (mTextureTarget == 0) {
mTextureTarget = aTarget;
}
MOZ_ASSERT(mTextureTarget == aTarget);
size_t index = aTextureUnit - LOCAL_GL_TEXTURE0;
// lazily grow the array of temporary textures
if (mTextures.Length() <= index) {
size_t prevLength = mTextures.Length();
mTextures.SetLength(index + 1);
for(unsigned int i = prevLength; i <= index; ++i) {
mTextures[i] = 0;
}
}
// lazily initialize the temporary textures
if (!mTextures[index]) {
if (!mGL->MakeCurrent()) {
return 0;
}
mGL->fGenTextures(1, &mTextures[index]);
mGL->fBindTexture(aTarget, mTextures[index]);
mGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
mGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
}
return mTextures[index];
}
void
PerUnitTexturePoolOGL::DestroyTextures()
{
if (mGL && mGL->MakeCurrent()) {
if (mTextures.Length() > 0) {
mGL->fDeleteTextures(mTextures.Length(), &mTextures[0]);
}
}
mTextures.SetLength(0);
}
void
PerFrameTexturePoolOGL::DestroyTextures()
{
if (!mGL->MakeCurrent()) {
return;
}
if (mUnusedTextures.Length() > 0) {
mGL->fDeleteTextures(mUnusedTextures.Length(), &mUnusedTextures[0]);
mUnusedTextures.Clear();
}
if (mCreatedTextures.Length() > 0) {
mGL->fDeleteTextures(mCreatedTextures.Length(), &mCreatedTextures[0]);
mCreatedTextures.Clear();
}
}
GLuint
PerFrameTexturePoolOGL::GetTexture(GLenum aTarget, GLenum)
{
if (mTextureTarget == 0) {
mTextureTarget = aTarget;
}
// The pool should always use the same texture target because it is illegal
// to change the target of an already exisiting gl texture.
// If we need to use several targets, a pool with several sub-pools (one per
// target) will have to be implemented.
// At the moment this pool is only used with tiling on b2g so we always need
// the same target.
MOZ_ASSERT(mTextureTarget == aTarget);
GLuint texture = 0;
if (!mUnusedTextures.IsEmpty()) {
// Try to reuse one from the unused pile first
texture = mUnusedTextures[0];
mUnusedTextures.RemoveElementAt(0);
} else if (mGL->MakeCurrent()) {
// There isn't one to reuse, create one.
mGL->fGenTextures(1, &texture);
mGL->fBindTexture(aTarget, texture);
mGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
mGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
}
if (texture) {
mCreatedTextures.AppendElement(texture);
}
return texture;
}
void
PerFrameTexturePoolOGL::EndFrame()
{
if (!mGL->MakeCurrent()) {
// this means the context got destroyed underneith us somehow, and the driver
// already has destroyed the textures.
mCreatedTextures.Clear();
mUnusedTextures.Clear();
return;
}
// Some platforms have issues unlocking Gralloc buffers even when they're
// rebound.
if (gfxPrefs::OverzealousGrallocUnlocking()) {
mUnusedTextures.AppendElements(mCreatedTextures);
mCreatedTextures.Clear();
}
// Delete unused textures
for (size_t i = 0; i < mUnusedTextures.Length(); i++) {
GLuint texture = mUnusedTextures[i];
mGL->fDeleteTextures(1, &texture);
}
mUnusedTextures.Clear();
// Move all created textures into the unused pile
mUnusedTextures.AppendElements(mCreatedTextures);
mCreatedTextures.Clear();
}
} /* layers */
} /* mozilla */
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