SF: Add support to draw S3D framebuffer target

Add support to draw S3D framebuffer target in case HWC driver
can not handle due to resource or capability issue.

Change-Id: I536fa4a03e246d51891045b692d5dc5be88f2adf
CRs-fixed: 999055

9 files changed, 263 insertions, 1 deletions

diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index 6a9008385..4a6d32044 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -120,6 +120,7 @@ ifeq ($(TARGET_USES_QCOM_BSP), true)
     LOCAL_C_INCLUDES += $(call project-path-for,qcom-display)/libgralloc
     LOCAL_C_INCLUDES += $(call project-path-for,qcom-display)/libqdutils
     LOCAL_SHARED_LIBRARIES += libqdutils
+    LOCAL_SHARED_LIBRARIES += libqdMetaData
     LOCAL_CFLAGS += -DQTI_BSP
     LOCAL_SRC_FILES += \
         ExSurfaceFlinger/ExLayer.cpp \
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index 9bdb7dea6..efdcd03a3 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -306,6 +306,7 @@ public:
     };
 
     friend class VSyncThread;
+    friend class ExHWComposer;
 
     // for debugging ----------------------------------------------------------
     void dump(String8& out) const;
diff --git a/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.cpp b/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.cpp
index 2b4109877..6b228ed85 100644
--- a/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.cpp
+++ b/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.cpp
@@ -31,6 +31,8 @@
 #include "ExHWComposer.h"
 #ifdef QTI_BSP
 #include <hardware/display_defs.h>
+#include <gralloc_priv.h>
+#include <qdMetaData.h>
 #endif
 
 namespace android {
@@ -74,4 +76,25 @@ bool ExHWComposer::isCompositionTypeBlit(const int32_t compType) const {
     return false;
 }
 
+#ifdef QTI_BSP
+uint32_t ExHWComposer::getS3DFlag(int disp) const {
+    const DisplayData& disp_data(mDisplayData[disp]);
+
+    for (size_t i=0 ; i<disp_data.list->numHwLayers-1; i++) {
+        const hwc_layer_1_t &l = disp_data.list->hwLayers[i];
+        private_handle_t *pvt_handle = static_cast<private_handle_t *>
+                                    (const_cast<native_handle_t*>(l.handle));
+
+        if (pvt_handle != NULL) {
+            struct S3DSFRender_t s3dRender;
+            getMetaData(pvt_handle, GET_S3D_RENDER, &s3dRender);
+            if (s3dRender.DisplayId == static_cast<uint32_t>(disp) && s3dRender.GpuRender) {
+                return s3dRender.GpuS3dFormat;
+            }
+        }
+    }
+    return 0;
+}
+#endif
+
 }; // namespace android
diff --git a/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.h b/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.h
index 2016ff063..06ee32b89 100644
--- a/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.h
+++ b/services/surfaceflinger/ExSurfaceFlinger/ExHWComposer.h
@@ -43,6 +43,10 @@ public:
 
     virtual ~ExHWComposer();
 
+#ifdef QTI_BSP
+    uint32_t getS3DFlag(int disp) const;
+#endif
+
 protected:
     bool mVDSEnabled;
     inline bool isVDSEnabled() const { return mVDSEnabled; };
diff --git a/services/surfaceflinger/ExSurfaceFlinger/ExLayer.cpp b/services/surfaceflinger/ExSurfaceFlinger/ExLayer.cpp
index fa4557909..5df34edf6 100644
--- a/services/surfaceflinger/ExSurfaceFlinger/ExLayer.cpp
+++ b/services/surfaceflinger/ExSurfaceFlinger/ExLayer.cpp
@@ -36,10 +36,12 @@
 #include <ui/GraphicBuffer.h>
 #ifdef QTI_BSP
 #include <gralloc_priv.h>
+#include <qdMetaData.h>
 #include <hardware/display_defs.h>
 #endif
 
 #include "ExLayer.h"
+#include "RenderEngine/RenderEngine.h"
 
 namespace android {
 
@@ -70,12 +72,18 @@ static Rect getAspectRatio(const sp<const DisplayDevice>& hw,
 
 ExLayer::ExLayer(SurfaceFlinger* flinger, const sp<Client>& client,
                  const String8& name, uint32_t w, uint32_t h, uint32_t flags)
+#ifdef QTI_BSP
+    : Layer(flinger, client, name, w, h, flags),
+      mMeshLeftTop(Mesh::TRIANGLE_FAN, 4, 2, 2),
+      mMeshRightBottom(Mesh::TRIANGLE_FAN, 4, 2, 2) {
+#else
     : Layer(flinger, client, name, w, h, flags) {
-
+#endif
     char property[PROPERTY_VALUE_MAX] = {0};
 
     mDebugLogs = false;
     mIsGPUAllowedForProtected = false;
+    mIsHDMIPrimary = false;
     if((property_get("persist.debug.qdframework.logs", property, NULL) > 0) &&
        (!strncmp(property, "1", PROPERTY_VALUE_MAX ) ||
         (!strncasecmp(property,"true", PROPERTY_VALUE_MAX )))) {
@@ -88,6 +96,12 @@ ExLayer::ExLayer(SurfaceFlinger* flinger, const sp<Client>& client,
            (atoi(property) == 1)) {
         mIsGPUAllowedForProtected = true;
     }
+
+    if ((property_get("persist.sys.is_hdmi_primary", property, NULL) > 0) &&
+           (atoi(property) == 1)) {
+        mIsHDMIPrimary = true;
+    }
+
 }
 
 ExLayer::~ExLayer() {
@@ -204,4 +218,172 @@ bool ExLayer::canAllowGPUForProtected() const {
     }
 }
 
+void ExLayer::drawWithOpenGL(const sp<const DisplayDevice>& hw,
+        const Region& /* clip */, bool useIdentityTransform) const {
+    const State& s(getDrawingState());
+#ifdef QTI_BSP
+    uint32_t s3d_fmt = 0;
+    private_handle_t *pvt_handle = static_cast<private_handle_t *>
+                                    (const_cast<native_handle_t*>(mActiveBuffer->handle));
+    if (pvt_handle != NULL) {
+        struct S3DSFRender_t s3dRender;
+        getMetaData(pvt_handle, GET_S3D_RENDER, &s3dRender);
+
+        if ((s3dRender.DisplayId == static_cast<uint32_t>(hw->getHwcDisplayId()) ||
+            mIsHDMIPrimary) && s3dRender.GpuRender) {
+            clearMetaData(pvt_handle, SET_S3D_RENDER);
+            s3d_fmt = s3dRender.GpuS3dFormat;
+        }
+    }
+#endif
+    computeGeometry(hw, mMesh, useIdentityTransform);
+
+    /*
+     * NOTE: the way we compute the texture coordinates here produces
+     * different results than when we take the HWC path -- in the later case
+     * the "source crop" is rounded to texel boundaries.
+     * This can produce significantly different results when the texture
+     * is scaled by a large amount.
+     *
+     * The GL code below is more logical (imho), and the difference with
+     * HWC is due to a limitation of the HWC API to integers -- a question
+     * is suspend is whether we should ignore this problem or revert to
+     * GL composition when a buffer scaling is applied (maybe with some
+     * minimal value)? Or, we could make GL behave like HWC -- but this feel
+     * like more of a hack.
+     */
+    Rect win(s.active.w, s.active.h);
+    if(!s.active.crop.isEmpty()) {
+        win = s.active.crop;
+    }
+#ifdef QTI_BSP
+    win = s.transform.transform(win);
+    win.intersect(hw->getViewport(), &win);
+    win = s.transform.inverse().transform(win);
+    win.intersect(Rect(s.active.w, s.active.h), &win);
+    win = reduce(win, s.activeTransparentRegion);
+#else
+    win = reduce(win, s.activeTransparentRegion);
+#endif
+    float left   = float(win.left)   / float(s.active.w);
+    float top    = float(win.top)    / float(s.active.h);
+    float right  = float(win.right)  / float(s.active.w);
+    float bottom = float(win.bottom) / float(s.active.h);
+
+    // TODO: we probably want to generate the texture coords with the mesh
+    // here we assume that we only have 4 vertices
+    Mesh::VertexArray<vec2> texCoords(mMesh.getTexCoordArray<vec2>());
+    texCoords[0] = vec2(left, 1.0f - top);
+    texCoords[1] = vec2(left, 1.0f - bottom);
+    texCoords[2] = vec2(right, 1.0f - bottom);
+    texCoords[3] = vec2(right, 1.0f - top);
+
+#ifdef QTI_BSP
+    computeGeometryS3D(hw, mMesh, mMeshLeftTop, mMeshRightBottom, s3d_fmt);
+#endif
+
+    RenderEngine& engine(mFlinger->getRenderEngine());
+    engine.setupLayerBlending(mPremultipliedAlpha, isOpaque(s), s.alpha);
+
+#ifdef QTI_BSP
+    if (s3d_fmt != HWC_S3DMODE_NONE) {
+        engine.setScissor(0, 0, hw->getWidth(), hw->getHeight());
+        engine.drawMesh(mMeshLeftTop);
+        engine.drawMesh(mMeshRightBottom);
+    } else {
+#endif
+        engine.drawMesh(mMesh);
+#ifdef QTI_BSP
+    }
+#endif
+
+    engine.disableBlending();
+}
+
+#ifdef QTI_BSP
+void ExLayer::computeGeometryS3D(const sp<const DisplayDevice>& hw, Mesh& mesh,
+        Mesh& meshLeftTop, Mesh &meshRightBottom, uint32_t s3d_fmt) const
+{
+    Mesh::VertexArray<vec2> position(mesh.getPositionArray<vec2>());
+    Mesh::VertexArray<vec2> positionLeftTop(meshLeftTop.getPositionArray<vec2>());
+    Mesh::VertexArray<vec2> positionRightBottom(meshRightBottom.getPositionArray<vec2>());
+    Mesh::VertexArray<vec2> texCoords(mesh.getTexCoordArray<vec2>());
+    Mesh::VertexArray<vec2> texCoordsLeftTop(meshLeftTop.getTexCoordArray<vec2>());
+    Mesh::VertexArray<vec2> texCoordsRightBottom(meshRightBottom.getTexCoordArray<vec2>());
+
+    Rect scissor = hw->getBounds();
+
+    if(s3d_fmt == HWC_S3DMODE_NONE) {
+        return;
+    }
+
+    uint32_t count = mesh.getVertexCount();
+    while(count--) {
+        positionLeftTop[count] = positionRightBottom[count] = position[count];
+        texCoordsLeftTop[count] = texCoordsRightBottom[count] = texCoords[count];
+    }
+
+    switch (s3d_fmt) {
+        case HWC_S3DMODE_LR:
+        case HWC_S3DMODE_RL:
+        {
+            positionLeftTop[0].x  = (position[0].x - scissor.left) / 2.0f + scissor.left;
+            positionLeftTop[1].x  = (position[1].x - scissor.left) / 2.0f + scissor.left;
+            positionLeftTop[2].x  = (position[2].x - scissor.left) / 2.0f + scissor.left;
+            positionLeftTop[3].x  = (position[3].x - scissor.left) / 2.0f + scissor.left;
+
+            positionRightBottom[0].x = positionLeftTop[0].x + scissor.getWidth()/2;
+            positionRightBottom[1].x = positionLeftTop[1].x + scissor.getWidth()/2;
+            positionRightBottom[2].x = positionLeftTop[2].x + scissor.getWidth()/2;
+            positionRightBottom[3].x = positionLeftTop[3].x + scissor.getWidth()/2;
+
+            if(isYuvLayer()) {
+                texCoordsLeftTop[0].x  =  texCoords[0].x / 2.0f;
+                texCoordsLeftTop[1].x  =  texCoords[1].x / 2.0f;
+                texCoordsLeftTop[2].x  =  texCoords[2].x / 2.0f;
+                texCoordsLeftTop[3].x  =  texCoords[3].x / 2.0f;
+
+                texCoordsRightBottom[0].x  =  texCoordsLeftTop[0].x + 0.5f;
+                texCoordsRightBottom[1].x  =  texCoordsLeftTop[1].x + 0.5f;
+                texCoordsRightBottom[2].x  =  texCoordsLeftTop[2].x + 0.5f;
+                texCoordsRightBottom[3].x  =  texCoordsLeftTop[3].x + 0.5f;
+            }
+            break;
+        }
+        case HWC_S3DMODE_TB:
+        {
+            positionRightBottom[0].y  = (position[0].y - scissor.top) / 2.0f + scissor.top;
+            positionRightBottom[1].y  = (position[1].y - scissor.top) / 2.0f + scissor.top;
+            positionRightBottom[2].y  = (position[2].y - scissor.top) / 2.0f + scissor.top;
+            positionRightBottom[3].y  = (position[3].y - scissor.top) / 2.0f + scissor.top;
+
+            positionLeftTop[0].y = positionRightBottom[0].y + scissor.getHeight() / 2.0f;
+            positionLeftTop[1].y = positionRightBottom[1].y + scissor.getHeight() / 2.0f;
+            positionLeftTop[2].y = positionRightBottom[2].y + scissor.getHeight() / 2.0f;
+            positionLeftTop[3].y = positionRightBottom[3].y + scissor.getHeight() / 2.0f;
+
+            positionLeftTop[0].x = positionRightBottom[0].x = position[0].x;
+            positionLeftTop[1].x = positionRightBottom[1].x = position[1].x;
+            positionLeftTop[2].x = positionRightBottom[2].x = position[2].x;
+            positionLeftTop[3].x = positionRightBottom[3].x = position[3].x;
+
+            if(isYuvLayer()) {
+                texCoordsRightBottom[0].y  =  texCoords[0].y / 2.0f;
+                texCoordsRightBottom[1].y  =  texCoords[1].y / 2.0f;
+                texCoordsRightBottom[2].y  =  texCoords[2].y / 2.0f;
+                texCoordsRightBottom[3].y  =  texCoords[3].y / 2.0f;
+
+                texCoordsLeftTop[0].y  =  texCoordsRightBottom[0].y + 0.5f;
+                texCoordsLeftTop[1].y  =  texCoordsRightBottom[1].y + 0.5f;
+                texCoordsLeftTop[2].y  =  texCoordsRightBottom[2].y + 0.5f;
+                texCoordsLeftTop[3].y  =  texCoordsRightBottom[3].y + 0.5f;
+            }
+            break;
+        }
+        default:
+            break;
+    }
+}
+#endif
+
 }; // namespace android
diff --git a/services/surfaceflinger/ExSurfaceFlinger/ExLayer.h b/services/surfaceflinger/ExSurfaceFlinger/ExLayer.h
index 01c74a810..9d22b5f52 100644
--- a/services/surfaceflinger/ExSurfaceFlinger/ExLayer.h
+++ b/services/surfaceflinger/ExSurfaceFlinger/ExLayer.h
@@ -43,6 +43,22 @@ class ExSurfaceFlinger;
 class ExLayer : public Layer
 {
 public:
+#ifdef QTI_BSP
+    enum {
+        /*
+         * HWC S3D_MODE is set by HWC driver to indicate that HWC driver can not support
+         * S3D standalone, need surfaceflinger help to draw layers twice to construct
+         * S3D framebuffer target.
+         */
+        HWC_S3DMODE_NONE = 0x00000000,
+        HWC_S3DMODE_LR = 0x00000001,
+        HWC_S3DMODE_RL = 0x00000002,
+        HWC_S3DMODE_TB = 0x00000003,
+        HWC_S3DMODE_FP = 0x00000004,
+        HWC_S3DMODE_MAX = 0x00000005,
+    };
+#endif
+
     ExLayer(SurfaceFlinger* flinger, const sp<Client>& client,
             const String8& name, uint32_t w, uint32_t h, uint32_t flags);
     virtual ~ExLayer();
@@ -57,11 +73,27 @@ public:
                              HWComposer::HWCLayerInterface& layer);
     virtual bool canAllowGPUForProtected() const;
 
+#ifdef QTI_BSP
+    virtual void computeGeometryS3D(const sp<const DisplayDevice>& hw, Mesh& mesh,
+        Mesh& meshLeftTop, Mesh &meshRightBottom, uint32_t s3d_fmt) const;
+#endif
 protected:
     bool mDebugLogs;
     bool isDebug() { return mDebugLogs; }
     bool mIsGPUAllowedForProtected;
+    bool mIsHDMIPrimary;
+
+private:
+#ifdef QTI_BSP
+    // The mesh used to draw the layer in GLES composition mode for s3d left/top
+    mutable Mesh mMeshLeftTop;
+    // The mesh used to draw the layer in GLES composition mode for s3d right/bottom
+    mutable Mesh mMeshRightBottom;
+
+    virtual void drawWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip,
+            bool useIdentityTransform) const;
 };
+#endif
 
 }; // namespace android
 
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 02d6f1639..0d6ec41ee 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -162,8 +162,13 @@ public:
     uint32_t getTransactionFlags(uint32_t flags);
     uint32_t setTransactionFlags(uint32_t flags);
 
+#ifdef QTI_BSP
+    virtual void computeGeometry(const sp<const DisplayDevice>& hw, Mesh& mesh,
+            bool useIdentityTransform) const;
+#else
     void computeGeometry(const sp<const DisplayDevice>& hw, Mesh& mesh,
             bool useIdentityTransform) const;
+#endif
     Rect computeBounds(const Region& activeTransparentRegion) const;
     Rect computeBounds() const;
 
@@ -392,9 +397,14 @@ private:
     // drawing
     void clearWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip,
             float r, float g, float b, float alpha) const;
+#ifdef QTI_BSP
+    virtual void drawWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip,
+            bool useIdentityTransform) const;
+#else
     void drawWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip,
             bool useIdentityTransform) const;
 
+#endif
     // Temporary - Used only for LEGACY camera mode.
     uint32_t getProducerStickyTransform() const;
 
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 97d3163eb..693e9d90f 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -74,6 +74,7 @@
 
 #include "DisplayHardware/FramebufferSurface.h"
 #include "DisplayHardware/HWComposer.h"
+#include "ExSurfaceFlinger/ExHWComposer.h"
 #include "DisplayHardware/VirtualDisplaySurface.h"
 
 #include "Effects/Daltonizer.h"
@@ -2003,7 +2004,12 @@ bool SurfaceFlinger::doComposeSurfaces(const sp<const DisplayDevice>& hw, const
         }
 
         // Never touch the framebuffer if we don't have any framebuffer layers
+#ifdef QTI_BSP
+        const bool hasHwcComposition = hwc.hasHwcComposition(id) |
+            (reinterpret_cast<ExHWComposer*>(&hwc))->getS3DFlag(id);
+#else
         const bool hasHwcComposition = hwc.hasHwcComposition(id);
+#endif
         if (hasHwcComposition) {
             // when using overlays, we assume a fully transparent framebuffer
             // NOTE: we could reduce how much we need to clear, for instance
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 20d65c1ae..2003d6efa 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -146,6 +146,9 @@ private:
     friend class DisplayEventConnection;
     friend class Layer;
     friend class LayerDim;
+#ifdef QTI_BSP
+    friend class ExLayer;
+#endif
     friend class MonitoredProducer;
     friend class LayerBlur;