source: trunk/src/platform/nacl/opengl_context.cpp @ 1084

Last change on this file since 1084 was 1084, checked in by sam, 8 years ago

nacl: the Mandelbrot zoomer is starting to work on NaCl.

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1// Copyright (c) 2011 The Native Client Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#if defined HAVE_CONFIG_H
6#   include "config.h"
7#endif
8
9#include <pthread.h>
10#include <ppapi/cpp/completion_callback.h>
11#include <ppapi/gles2/gl2ext_ppapi.h>
12
13#include "core.h"
14
15#include "platform/nacl/opengl_context.h"
16
17namespace {
18// This is called by the brower when the 3D context has been flushed to the
19// browser window.
20void FlushCallback(void* data, int32_t result) {
21  static_cast<lol::OpenGLContext*>(data)->set_flush_pending(false);
22}
23}  // namespace
24
25namespace lol {
26
27OpenGLContext::OpenGLContext(pp::Instance* instance)
28    : pp::Graphics3DClient(instance),
29      flush_pending_(false) {
30  pp::Module* module = pp::Module::Get();
31  assert(module);
32  gles2_interface_ = static_cast<const struct PPB_OpenGLES2*>(
33      module->GetBrowserInterface(PPB_OPENGLES2_INTERFACE));
34  assert(gles2_interface_);
35}
36
37OpenGLContext::~OpenGLContext() {
38  glSetCurrentContextPPAPI(0);
39}
40
41bool OpenGLContext::MakeContextCurrent(pp::Instance* instance) {
42  if (instance == NULL) {
43    glSetCurrentContextPPAPI(0);
44    return false;
45  }
46  // Lazily create the Pepper context.
47  if (context_.is_null()) {
48    int32_t attribs[] = {
49        PP_GRAPHICS3DATTRIB_ALPHA_SIZE, 8,
50        PP_GRAPHICS3DATTRIB_DEPTH_SIZE, 24,
51        PP_GRAPHICS3DATTRIB_STENCIL_SIZE, 8,
52        PP_GRAPHICS3DATTRIB_SAMPLES, 0,
53        PP_GRAPHICS3DATTRIB_SAMPLE_BUFFERS, 0,
54        PP_GRAPHICS3DATTRIB_WIDTH, size_.width(),
55        PP_GRAPHICS3DATTRIB_HEIGHT, size_.height(),
56        PP_GRAPHICS3DATTRIB_NONE
57    };
58    context_ = pp::Graphics3D(instance, pp::Graphics3D(), attribs);
59    if (context_.is_null()) {
60      glSetCurrentContextPPAPI(0);
61      return false;
62    }
63    instance->BindGraphics(context_);
64  }
65  glSetCurrentContextPPAPI(context_.pp_resource());
66  return true;
67}
68
69void OpenGLContext::InvalidateContext(pp::Instance* instance) {
70  glSetCurrentContextPPAPI(0);
71}
72
73void OpenGLContext::ResizeContext(const pp::Size& size) {
74  size_ = size;
75  if (!context_.is_null()) {
76    context_.ResizeBuffers(size.width(), size.height());
77  }
78}
79
80
81void OpenGLContext::FlushContext() {
82  if (flush_pending()) {
83    // A flush is pending so do nothing; just drop this flush on the floor.
84    return;
85  }
86  set_flush_pending(true);
87  context_.SwapBuffers(pp::CompletionCallback(&FlushCallback, this));
88}
89}  // namespace lol
90
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