blob: 77608ce2b8fe4eb639126140b7a08ae4c2340902 [file] [log] [blame]
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <array>
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "remoting/client/display/canvas.h"
#include "remoting/client/display/sys_opengl.h"
namespace remoting {
// This class holds zoom and pan configurations of the canvas and is used to
// draw textures on the canvas.
// Must be constructed after the OpenGL surface is created and destroyed before
// the surface is destroyed.
class GlCanvas : public Canvas {
// gl_version: version number of the OpenGL ES context. Either 2 or 3.
GlCanvas(int gl_version);
~GlCanvas() override;
// Canvas implementation.
void Clear() override;
void SetTransformationMatrix(const std::array<float, 9>& matrix) override;
void SetViewSize(int width, int height) override;
void DrawTexture(int texture_id,
int texture_handle,
int vertex_buffer,
float alpha_multiplier) override;
int GetVersion() const override;
int GetMaxTextureSize() const override;
base::WeakPtr<Canvas> GetWeakPtr() override;
int gl_version_;
int max_texture_size_ = 0;
bool transformation_set_ = false;
bool view_size_set_ = false;
// Handles.
GLuint vertex_shader_;
GLuint fragment_shader_;
GLuint program_;
// Locations of the corresponding shader attributes.
GLuint transform_location_;
GLuint view_size_location_;
GLuint texture_location_;
GLuint alpha_multiplier_location_;
GLuint position_location_;
GLuint tex_cord_location_;
base::ThreadChecker thread_checker_;
base::WeakPtrFactory<Canvas> weak_factory_;
} // namespace remoting