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framebindings.go
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/
framebindings.go
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// Copyright (C) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package gvr
import (
"context"
"github.com/google/gapid/gapis/api"
"github.com/google/gapid/gapis/api/gles"
"github.com/google/gapid/gapis/capture"
"github.com/google/gapid/gapis/database"
"github.com/google/gapid/gapis/resolve"
"github.com/google/gapid/gapis/service/path"
)
func getFramebuffer(ctx context.Context, id api.CmdID) (gles.FramebufferId, error) {
c := capture.Get(ctx)
cmds, err := resolve.Cmds(ctx, c)
if err != nil {
return 0, err
}
switch cmds[id].(type) {
case *Gvr_frame_submit:
bindings, err := getFrameBindings(ctx, c)
if err != nil {
return 0, err
}
return bindings.submitBuffer[id], nil
}
return 0, nil
}
type frameBindings struct {
submitBuffer map[api.CmdID]gles.FramebufferId
}
func getFrameBindings(ctx context.Context, c *path.Capture) (*frameBindings, error) {
obj, err := database.Build(ctx, &FrameBindingsResolvable{Capture: c})
if err != nil {
return nil, err
}
return obj.(*frameBindings), nil
}
// Resolve implements the database.Resolver interface.
func (r *FrameBindingsResolvable) Resolve(ctx context.Context) (interface{}, error) {
ctx = capture.Put(ctx, r.Capture)
cmds, err := resolve.Cmds(ctx, r.Capture)
if err != nil {
return nil, err
}
s, err := capture.NewState(ctx)
if err != nil {
return nil, err
}
out := &frameBindings{
submitBuffer: map[api.CmdID]gles.FramebufferId{},
}
frameToBuffer := map[GvrFrameᵖ]gles.FramebufferId{}
api.ForeachCmd(ctx, cmds, func(ctx context.Context, id api.CmdID, cmd api.Cmd) error {
switch cmd := cmd.(type) {
case *Gvr_frame_submit:
// Annoyingly gvr_frame_submit takes a pointer to the frame pointer,
// just so it can be nullified before returning. To avoid another
// state mutation just to get the pointer, cache them here.
cmd.extras.Observations().ApplyReads(s.Memory.ApplicationPool())
frame, err := cmd.Frame().Read(ctx, cmd, s, nil)
if err != nil {
return err
}
out.submitBuffer[id] = frameToBuffer[frame]
case *Gvr_frame_get_framebuffer_object:
frameToBuffer[GvrFrameᵖ(cmd.Frame())] = gles.FramebufferId(cmd.Result())
case *gles.GlBindFramebuffer:
if callerID := cmd.Caller(); callerID != api.CmdNoID {
switch caller := cmds[callerID].(type) {
case *Gvr_frame_bind_buffer:
if caller.Index() == 0 { // Only consider the 0'th frame index.
frameToBuffer[caller.Frame()] = cmd.Framebuffer()
}
}
}
}
cmd.Mutate(ctx, id, s, nil, nil)
return nil
})
return out, nil
}