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fl_pixel_buffer_texture.cc
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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
12 typedef struct {
13 int64_t id;
14 GLuint texture_id;
15 } FlPixelBufferTexturePrivate;
16
17 static void fl_pixel_buffer_texture_iface_init(FlTextureInterface* iface);
18
19 G_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
28 static 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
37 static 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
45 static 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
50 static 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
64 static 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
71 gboolean 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
119 static void fl_pixel_buffer_texture_class_init(
120 FlPixelBufferTextureClass* klass) {
121 G_OBJECT_CLASS(klass)->dispose = fl_pixel_buffer_texture_dispose;
122 }
123
124 static void fl_pixel_buffer_texture_init(FlPixelBufferTexture* self) {}
fl_pixel_buffer_texture.h
priv
FlPixelBufferTexturePrivate * priv
Definition: fl_pixel_buffer_texture.cc:30
id
int64_t id
Definition: fl_pixel_buffer_texture.cc:28
fl_pixel_buffer_texture_iface_init
static void fl_pixel_buffer_texture_iface_init(FlTextureInterface *iface)
Definition: fl_pixel_buffer_texture.cc:45
G_DEFINE_TYPE_WITH_CODE
G_DEFINE_TYPE_WITH_CODE(FlPixelBufferTexture, fl_pixel_buffer_texture, G_TYPE_OBJECT, G_IMPLEMENT_INTERFACE(fl_texture_get_type(), fl_pixel_buffer_texture_iface_init);G_ADD_PRIVATE(FlPixelBufferTexture)) static void fl_pixel_buffer_texture_set_id(FlTexture *texture
fl_pixel_buffer_texture_populate
gboolean fl_pixel_buffer_texture_populate(FlPixelBufferTexture *texture, uint32_t width, uint32_t height, FlutterOpenGLTexture *opengl_texture, GError **error)
Definition: fl_pixel_buffer_texture.cc:71
TRUE
return TRUE
Definition: fl_pixel_buffer_texture_test.cc:53
FlPixelBufferTexturePrivate::id
int64_t id
Definition: fl_pixel_buffer_texture.cc:13
FlPixelBufferTexturePrivate::texture_id
GLuint texture_id
Definition: fl_pixel_buffer_texture.cc:14
height
const uint8_t uint32_t uint32_t * height
Definition: fl_pixel_buffer_texture_test.cc:39
fl_pixel_buffer_texture_private.h
fl_pixel_buffer_texture_class_init
static void fl_pixel_buffer_texture_class_init(FlPixelBufferTextureClass *klass)
Definition: fl_pixel_buffer_texture.cc:119
error
const uint8_t uint32_t uint32_t GError ** error
Definition: fl_pixel_buffer_texture_test.cc:40
check_gl_error
static void check_gl_error(int line)
Definition: fl_pixel_buffer_texture.cc:64
fl_pixel_buffer_texture_get_id
static int64_t fl_pixel_buffer_texture_get_id(FlTexture *texture)
Definition: fl_pixel_buffer_texture.cc:37
fl_pixel_buffer_texture_dispose
static void fl_pixel_buffer_texture_dispose(GObject *object)
Definition: fl_pixel_buffer_texture.cc:50
buffer
static const uint8_t buffer[]
Definition: fl_pixel_buffer_texture_test.cc:44
width
const uint8_t uint32_t * width
Definition: fl_pixel_buffer_texture_test.cc:38
FlPixelBufferTexturePrivate
Definition: fl_pixel_buffer_texture.cc:12
fl_pixel_buffer_texture_init
static void fl_pixel_buffer_texture_init(FlPixelBufferTexture *self)
Definition: fl_pixel_buffer_texture.cc:124