1// Copyright 2013 The Flutter 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#include "flutter/shell/platform/linux/public/flutter_linux/fl_pixel_buffer_texture.h"
6
7#include <epoxy/gl.h>
8#include <gmodule.h>
9
10#include "flutter/shell/platform/linux/fl_pixel_buffer_texture_private.h"
11
12typedef struct {
13 int64_t id;
14 GLuint texture_id;
15} FlPixelBufferTexturePrivate;
16
17static void fl_pixel_buffer_texture_iface_init(FlTextureInterface* iface);
18
19G_DEFINE_TYPE_WITH_CODE(
20 FlPixelBufferTexture,
21 fl_pixel_buffer_texture,
22 G_TYPE_OBJECT,
23 G_IMPLEMENT_INTERFACE(fl_texture_get_type(),
24 fl_pixel_buffer_texture_iface_init);
25 G_ADD_PRIVATE(FlPixelBufferTexture))
26
27// Implements FlTexture::set_id
28static void fl_pixel_buffer_texture_set_id(FlTexture* texture, int64_t id) {
29 FlPixelBufferTexture* self = FL_PIXEL_BUFFER_TEXTURE(texture);
30 FlPixelBufferTexturePrivate* priv =
31 reinterpret_cast<FlPixelBufferTexturePrivate*>(
32 fl_pixel_buffer_texture_get_instance_private(self));
33 priv->id = id;
34}
35
36// Implements FlTexture::set_id
37static int64_t fl_pixel_buffer_texture_get_id(FlTexture* texture) {
38 FlPixelBufferTexture* self = FL_PIXEL_BUFFER_TEXTURE(texture);
39 FlPixelBufferTexturePrivate* priv =
40 reinterpret_cast<FlPixelBufferTexturePrivate*>(
41 fl_pixel_buffer_texture_get_instance_private(self));
42 return priv->id;
43}
44
45static void fl_pixel_buffer_texture_iface_init(FlTextureInterface* iface) {
46 iface->set_id = fl_pixel_buffer_texture_set_id;
47 iface->get_id = fl_pixel_buffer_texture_get_id;
48}
49
50static void fl_pixel_buffer_texture_dispose(GObject* object) {
51 FlPixelBufferTexture* self = FL_PIXEL_BUFFER_TEXTURE(object);
52 FlPixelBufferTexturePrivate* priv =
53 reinterpret_cast<FlPixelBufferTexturePrivate*>(
54 fl_pixel_buffer_texture_get_instance_private(self));
55
56 if (priv->texture_id) {
57 glDeleteTextures(1, &priv->texture_id);
58 priv->texture_id = 0;
59 }
60
61 G_OBJECT_CLASS(fl_pixel_buffer_texture_parent_class)->dispose(object);
62}
63
64static void check_gl_error(int line) {
65 GLenum err = glGetError();
66 if (err) {
67 g_warning("glGetError %x (%s:%d)\n", err, __FILE__, line);
68 }
69}
70
71gboolean fl_pixel_buffer_texture_populate(FlPixelBufferTexture* texture,
72 uint32_t width,
73 uint32_t height,
74 FlutterOpenGLTexture* opengl_texture,
75 GError** error) {
76 FlPixelBufferTexture* self = FL_PIXEL_BUFFER_TEXTURE(texture);
77 FlPixelBufferTexturePrivate* priv =
78 reinterpret_cast<FlPixelBufferTexturePrivate*>(
79 fl_pixel_buffer_texture_get_instance_private(self));
80
81 const uint8_t* buffer = nullptr;
82 if (!FL_PIXEL_BUFFER_TEXTURE_GET_CLASS(self)->copy_pixels(
83 self, &buffer, &width, &height, error)) {
84 return FALSE;
85 }
86
87 if (priv->texture_id == 0) {
88 glGenTextures(1, &priv->texture_id);
89 check_gl_error(__LINE__);
90 glBindTexture(GL_TEXTURE_2D, priv->texture_id);
91 check_gl_error(__LINE__);
92 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
93 check_gl_error(__LINE__);
94 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
95 check_gl_error(__LINE__);
96 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
97 check_gl_error(__LINE__);
98 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
99 check_gl_error(__LINE__);
100 } else {
101 glBindTexture(GL_TEXTURE_2D, priv->texture_id);
102 check_gl_error(__LINE__);
103 }
104 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA,
105 GL_UNSIGNED_BYTE, buffer);
106 check_gl_error(__LINE__);
107
108 opengl_texture->target = GL_TEXTURE_2D;
109 opengl_texture->name = priv->texture_id;
110 opengl_texture->format = GL_RGBA8;
111 opengl_texture->destruction_callback = nullptr;
112 opengl_texture->user_data = nullptr;
113 opengl_texture->width = width;
114 opengl_texture->height = height;
115
116 return TRUE;
117}
118
119static void fl_pixel_buffer_texture_class_init(
120 FlPixelBufferTextureClass* klass) {
121 G_OBJECT_CLASS(klass)->dispose = fl_pixel_buffer_texture_dispose;
122}
123
124static void fl_pixel_buffer_texture_init(FlPixelBufferTexture* self) {}
125

source code of flutter_engine/flutter/shell/platform/linux/fl_pixel_buffer_texture.cc