michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "mozilla/layers/Compositor.h"
michael@0: #include "base/message_loop.h"          // for MessageLoop
michael@0: #include "mozilla/layers/CompositorParent.h"  // for CompositorParent
michael@0: #include "mozilla/layers/Effects.h"     // for Effect, EffectChain, etc
michael@0: #include "mozilla/mozalloc.h"           // for operator delete, etc
michael@0: #include "gfx2DGlue.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: class Matrix4x4;
michael@0: }
michael@0: 
michael@0: namespace layers {
michael@0: 
michael@0: /* static */ LayersBackend Compositor::sBackend = LayersBackend::LAYERS_NONE;
michael@0: /* static */ LayersBackend
michael@0: Compositor::GetBackend()
michael@0: {
michael@0:   AssertOnCompositorThread();
michael@0:   return sBackend;
michael@0: }
michael@0: 
michael@0: /* static */ void
michael@0: Compositor::SetBackend(LayersBackend backend)
michael@0: {
michael@0:   if (sBackend != LayersBackend::LAYERS_NONE && sBackend != backend) {
michael@0:     // Assert this once we figure out bug 972891.
michael@0:     //MOZ_CRASH("Trying to use more than one OMTC compositor.");
michael@0: 
michael@0: #ifdef XP_MACOSX
michael@0:     printf("ERROR: Changing compositor from %u to %u.\n",
michael@0:            unsigned(sBackend), unsigned(backend));
michael@0: #endif
michael@0:   }
michael@0:   sBackend = backend;
michael@0: }
michael@0: 
michael@0: /* static */ void
michael@0: Compositor::AssertOnCompositorThread()
michael@0: {
michael@0:   MOZ_ASSERT(CompositorParent::CompositorLoop() ==
michael@0:              MessageLoop::current(),
michael@0:              "Can only call this from the compositor thread!");
michael@0: }
michael@0: 
michael@0: bool
michael@0: Compositor::ShouldDrawDiagnostics(DiagnosticFlags aFlags)
michael@0: {
michael@0:   if ((aFlags & DIAGNOSTIC_TILE) && !(mDiagnosticTypes & DIAGNOSTIC_TILE_BORDERS)) {
michael@0:     return false;
michael@0:   }
michael@0:   if ((aFlags & DIAGNOSTIC_BIGIMAGE) &&
michael@0:       !(mDiagnosticTypes & DIAGNOSTIC_BIGIMAGE_BORDERS)) {
michael@0:     return false;
michael@0:   }
michael@0:   if (!mDiagnosticTypes) {
michael@0:     return false;
michael@0:   }
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: void
michael@0: Compositor::DrawDiagnostics(DiagnosticFlags aFlags,
michael@0:                             const nsIntRegion& aVisibleRegion,
michael@0:                             const gfx::Rect& aClipRect,
michael@0:                             const gfx::Matrix4x4& aTransform,
michael@0:                             uint32_t aFlashCounter)
michael@0: {
michael@0:   if (!ShouldDrawDiagnostics(aFlags)) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   if (aVisibleRegion.GetNumRects() > 1) {
michael@0:     nsIntRegionRectIterator screenIter(aVisibleRegion);
michael@0: 
michael@0:     while (const nsIntRect* rect = screenIter.Next())
michael@0:     {
michael@0:       DrawDiagnostics(aFlags | DIAGNOSTIC_REGION_RECT,
michael@0:                       ToRect(*rect), aClipRect, aTransform, aFlashCounter);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   DrawDiagnostics(aFlags, ToRect(aVisibleRegion.GetBounds()),
michael@0:                   aClipRect, aTransform, aFlashCounter);
michael@0: }
michael@0: 
michael@0: void
michael@0: Compositor::DrawDiagnostics(DiagnosticFlags aFlags,
michael@0:                             const gfx::Rect& aVisibleRect,
michael@0:                             const gfx::Rect& aClipRect,
michael@0:                             const gfx::Matrix4x4& aTransform,
michael@0:                             uint32_t aFlashCounter)
michael@0: {
michael@0:   if (!ShouldDrawDiagnostics(aFlags)) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   DrawDiagnosticsInternal(aFlags, aVisibleRect, aClipRect, aTransform,
michael@0:                           aFlashCounter);
michael@0: }
michael@0: 
michael@0: gfx::Rect
michael@0: Compositor::ClipRectInLayersCoordinates(gfx::Rect aClip) const {
michael@0:   gfx::Rect result;
michael@0:   aClip = aClip + GetCurrentRenderTarget()->GetOrigin();
michael@0:   gfx::IntSize destSize = GetWidgetSize();
michael@0: 
michael@0:   switch (mScreenRotation) {
michael@0:     case ROTATION_0:
michael@0:       result = aClip;
michael@0:       break;
michael@0:     case ROTATION_90:
michael@0:       result = gfx::Rect(aClip.y,
michael@0:                          destSize.width - aClip.x - aClip.width,
michael@0:                          aClip.height, aClip.width);
michael@0:       break;
michael@0:     case ROTATION_270:
michael@0:       result = gfx::Rect(destSize.height - aClip.y - aClip.height,
michael@0:                          aClip.x,
michael@0:                          aClip.height, aClip.width);
michael@0:       break;
michael@0:     case ROTATION_180:
michael@0:       result = gfx::Rect(destSize.width - aClip.x - aClip.width,
michael@0:                          destSize.height - aClip.y - aClip.height,
michael@0:                          aClip.width, aClip.height);
michael@0:       break;
michael@0:       // ScreenRotation has a sentinel value, need to catch it in the switch
michael@0:       // statement otherwise the build fails (-WError)
michael@0:     default: {}
michael@0:   }
michael@0:   return result;
michael@0: }
michael@0: 
michael@0: void
michael@0: Compositor::DrawDiagnosticsInternal(DiagnosticFlags aFlags,
michael@0:                                     const gfx::Rect& aVisibleRect,
michael@0:                                     const gfx::Rect& aClipRect,
michael@0:                                     const gfx::Matrix4x4& aTransform,
michael@0:                                     uint32_t aFlashCounter)
michael@0: {
michael@0: #ifdef MOZ_B2G
michael@0:   int lWidth = 4;
michael@0: #elif defined(ANDROID)
michael@0:   int lWidth = 10;
michael@0: #else
michael@0:   int lWidth = 2;
michael@0: #endif
michael@0:   float opacity = 0.7f;
michael@0: 
michael@0:   gfx::Color color;
michael@0:   if (aFlags & DIAGNOSTIC_CONTENT) {
michael@0:     color = gfx::Color(0.0f, 1.0f, 0.0f, 1.0f); // green
michael@0:     if (aFlags & DIAGNOSTIC_COMPONENT_ALPHA) {
michael@0:       color = gfx::Color(0.0f, 1.0f, 1.0f, 1.0f); // greenish blue
michael@0:     }
michael@0:   } else if (aFlags & DIAGNOSTIC_IMAGE) {
michael@0:     color = gfx::Color(1.0f, 0.0f, 0.0f, 1.0f); // red
michael@0:   } else if (aFlags & DIAGNOSTIC_COLOR) {
michael@0:     color = gfx::Color(0.0f, 0.0f, 1.0f, 1.0f); // blue
michael@0:   } else if (aFlags & DIAGNOSTIC_CONTAINER) {
michael@0:     color = gfx::Color(0.8f, 0.0f, 0.8f, 1.0f); // purple
michael@0:   }
michael@0: 
michael@0:   // make tile borders a bit more transparent to keep layer borders readable.
michael@0:   if (aFlags & DIAGNOSTIC_TILE ||
michael@0:       aFlags & DIAGNOSTIC_BIGIMAGE ||
michael@0:       aFlags & DIAGNOSTIC_REGION_RECT) {
michael@0:     lWidth = 1;
michael@0:     opacity = 0.5f;
michael@0:     color.r *= 0.7f;
michael@0:     color.g *= 0.7f;
michael@0:     color.b *= 0.7f;
michael@0:   }
michael@0: 
michael@0:   if (mDiagnosticTypes & DIAGNOSTIC_FLASH_BORDERS) {
michael@0:     float flash = (float)aFlashCounter / (float)DIAGNOSTIC_FLASH_COUNTER_MAX;
michael@0:     color.r *= flash;
michael@0:     color.g *= flash;
michael@0:     color.b *= flash;
michael@0:   }
michael@0: 
michael@0:   EffectChain effects;
michael@0: 
michael@0:   effects.mPrimaryEffect = new EffectSolidColor(color);
michael@0:   // left
michael@0:   this->DrawQuad(gfx::Rect(aVisibleRect.x, aVisibleRect.y,
michael@0:                            lWidth, aVisibleRect.height),
michael@0:                  aClipRect, effects, opacity,
michael@0:                  aTransform);
michael@0:   // top
michael@0:   this->DrawQuad(gfx::Rect(aVisibleRect.x + lWidth, aVisibleRect.y,
michael@0:                            aVisibleRect.width - 2 * lWidth, lWidth),
michael@0:                  aClipRect, effects, opacity,
michael@0:                  aTransform);
michael@0:   // right
michael@0:   this->DrawQuad(gfx::Rect(aVisibleRect.x + aVisibleRect.width - lWidth, aVisibleRect.y,
michael@0:                            lWidth, aVisibleRect.height),
michael@0:                  aClipRect, effects, opacity,
michael@0:                  aTransform);
michael@0:   // bottom
michael@0:   this->DrawQuad(gfx::Rect(aVisibleRect.x + lWidth, aVisibleRect.y + aVisibleRect.height-lWidth,
michael@0:                            aVisibleRect.width - 2 * lWidth, lWidth),
michael@0:                  aClipRect, effects, opacity,
michael@0:                  aTransform);
michael@0: }
michael@0: 
michael@0: } // namespace
michael@0: } // namespace