gecko-dev/gfx/layers/Compositor.cpp
2014-02-14 13:35:49 -08:00

172 lines
5.1 KiB
C++

/* -*- 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 "mozilla/layers/Compositor.h"
#include "base/message_loop.h" // for MessageLoop
#include "mozilla/layers/CompositorParent.h" // for CompositorParent
#include "mozilla/layers/Effects.h" // for Effect, EffectChain, etc
#include "mozilla/mozalloc.h" // for operator delete, etc
#include "gfx2DGlue.h"
namespace mozilla {
namespace gfx {
class Matrix4x4;
}
namespace layers {
/* static */ LayersBackend Compositor::sBackend = LayersBackend::LAYERS_NONE;
/* static */ LayersBackend
Compositor::GetBackend()
{
AssertOnCompositorThread();
return sBackend;
}
/* static */ void
Compositor::SetBackend(LayersBackend backend)
{
if (sBackend != LayersBackend::LAYERS_NONE && sBackend != backend) {
// Assert this once we figure out bug 972891.
//MOZ_CRASH("Trying to use more than one OMTC compositor.");
#ifdef XP_MACOSX
printf("ERROR: Changing compositor from %u to %u.\n",
unsigned(sBackend), unsigned(backend));
#endif
}
sBackend = backend;
}
/* static */ void
Compositor::AssertOnCompositorThread()
{
MOZ_ASSERT(CompositorParent::CompositorLoop() ==
MessageLoop::current(),
"Can only call this from the compositor thread!");
}
bool
Compositor::ShouldDrawDiagnostics(DiagnosticFlags aFlags)
{
if ((aFlags & DIAGNOSTIC_TILE) && !(mDiagnosticTypes & DIAGNOSTIC_TILE_BORDERS)) {
return false;
}
if ((aFlags & DIAGNOSTIC_BIGIMAGE) &&
!(mDiagnosticTypes & DIAGNOSTIC_BIGIMAGE_BORDERS)) {
return false;
}
if (!mDiagnosticTypes) {
return false;
}
return true;
}
void
Compositor::DrawDiagnostics(DiagnosticFlags aFlags,
const nsIntRegion& aVisibleRegion,
const gfx::Rect& aClipRect,
const gfx::Matrix4x4& aTransform)
{
if (!ShouldDrawDiagnostics(aFlags)) {
return;
}
if (aVisibleRegion.GetNumRects() > 1) {
nsIntRegionRectIterator screenIter(aVisibleRegion);
while (const nsIntRect* rect = screenIter.Next())
{
DrawDiagnostics(aFlags | DIAGNOSTIC_REGION_RECT,
ToRect(*rect), aClipRect, aTransform);
}
}
DrawDiagnostics(aFlags, ToRect(aVisibleRegion.GetBounds()),
aClipRect, aTransform);
}
void
Compositor::DrawDiagnostics(DiagnosticFlags aFlags,
const gfx::Rect& aVisibleRect,
const gfx::Rect& aClipRect,
const gfx::Matrix4x4& aTransform)
{
if (!ShouldDrawDiagnostics(aFlags)) {
return;
}
DrawDiagnosticsInternal(aFlags, aVisibleRect,
aClipRect, aTransform);
}
void
Compositor::DrawDiagnosticsInternal(DiagnosticFlags aFlags,
const gfx::Rect& aVisibleRect,
const gfx::Rect& aClipRect,
const gfx::Matrix4x4& aTransform)
{
#ifdef MOZ_B2G
int lWidth = 4;
#elif defined(ANDROID)
int lWidth = 10;
#else
int lWidth = 2;
#endif
float opacity = 0.7f;
gfx::Color color;
if (aFlags & DIAGNOSTIC_CONTENT) {
color = gfx::Color(0.0f, 1.0f, 0.0f, 1.0f); // green
if (aFlags & DIAGNOSTIC_COMPONENT_ALPHA) {
color = gfx::Color(0.0f, 1.0f, 1.0f, 1.0f); // greenish blue
}
} else if (aFlags & DIAGNOSTIC_IMAGE) {
color = gfx::Color(1.0f, 0.0f, 0.0f, 1.0f); // red
} else if (aFlags & DIAGNOSTIC_COLOR) {
color = gfx::Color(0.0f, 0.0f, 1.0f, 1.0f); // blue
} else if (aFlags & DIAGNOSTIC_CONTAINER) {
color = gfx::Color(0.8f, 0.0f, 0.8f, 1.0f); // purple
}
// make tile borders a bit more transparent to keep layer borders readable.
if (aFlags & DIAGNOSTIC_TILE ||
aFlags & DIAGNOSTIC_BIGIMAGE ||
aFlags & DIAGNOSTIC_REGION_RECT) {
lWidth = 1;
opacity = 0.5f;
color.r *= 0.7f;
color.g *= 0.7f;
color.b *= 0.7f;
}
EffectChain effects;
effects.mPrimaryEffect = new EffectSolidColor(color);
// left
this->DrawQuad(gfx::Rect(aVisibleRect.x, aVisibleRect.y,
lWidth, aVisibleRect.height),
aClipRect, effects, opacity,
aTransform);
// top
this->DrawQuad(gfx::Rect(aVisibleRect.x + lWidth, aVisibleRect.y,
aVisibleRect.width - 2 * lWidth, lWidth),
aClipRect, effects, opacity,
aTransform);
// right
this->DrawQuad(gfx::Rect(aVisibleRect.x + aVisibleRect.width - lWidth, aVisibleRect.y,
lWidth, aVisibleRect.height),
aClipRect, effects, opacity,
aTransform);
// bottom
this->DrawQuad(gfx::Rect(aVisibleRect.x + lWidth, aVisibleRect.y + aVisibleRect.height-lWidth,
aVisibleRect.width - 2 * lWidth, lWidth),
aClipRect, effects, opacity,
aTransform);
}
} // namespace
} // namespace