1 #ifndef DALI_NATIVE_IMAGE_INTERFACE_H
2 #define DALI_NATIVE_IMAGE_INTERFACE_H
5 * Copyright (c) 2020 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
23 #include <cstdint> // uint32_t
26 #include <dali/public-api/object/any.h>
27 #include <dali/public-api/object/ref-object.h>
32 * @addtogroup dali_core_images
37 * @brief Abstract interface to provide platform-specific support for handling image data.
39 * For example, an implementation could use EGL extensions, etc.
42 class NativeImageInterface : public Dali::RefObject
45 class Extension; ///< Forward declare future extension interface
48 * @brief Creates the resource for the NativeImage.
50 * e.g. For the EglImageKHR extension, this corresponds to calling eglCreateImageKHR().
52 * @return false If the initialization fails
53 * @pre The graphics subsystem has been initialized
55 virtual bool CreateResource() = 0;
58 * @brief Destroys the resource for the NativeImage.
60 * e.g. For the EglImageKHR extension, this corresponds to calling eglDestroyImageKHR().
62 * @pre The graphics subsystem has been initialized
64 virtual void DestroyResource() = 0;
67 * @brief Uses the NativeImage as a texture for rendering.
70 * @return An error code from the graphics subsystem.
71 * @pre The graphics subsystem has been initialized
73 virtual uint32_t TargetTexture() = 0;
76 * @brief Called internally when the texture is bound in the GPU
78 * The correct texture sampler has already been bound before the function gets called.
80 * @pre The graphics subsystem has been initialized
82 virtual void PrepareTexture() = 0;
85 * @brief Returns the width of the NativeImage.
90 virtual uint32_t GetWidth() const = 0;
93 * @brief Returns the height of the NativeImage.
98 virtual uint32_t GetHeight() const = 0;
101 * @brief Queries whether blending is required.
103 * @return True if blending is required
105 virtual bool RequiresBlending() const = 0;
108 * @brief Get the texture target for binding native image as texture.
111 * @return Texture target.
113 virtual int GetTextureTarget() const = 0;
116 * @brief Get custom fragment prefix for rendering native image.
119 * @return Custom fragment prefix code as string.
121 virtual const char* GetCustomFragmentPrefix() const = 0;
124 * @brief Get custom sampler type name for rendering native image.
127 * @return Custom sampler type name.
129 virtual const char* GetCustomSamplerTypename() const = 0;
132 * @brief Retrieves the internal native image.
135 * @return Any object containing the internal native image source
137 virtual Any GetNativeImageHandle() const = 0;
140 * @brief Determine if the source for the native image has changed characteristics.
143 * @return true if the source data has modified any characteristics of the
144 * native image, for example if the size of the buffer has changed.
146 virtual bool SourceChanged() const = 0;
149 * @brief Retrieves the extension for the interface.
152 * @return The extension if available, NULL otherwise
154 virtual Extension* GetExtension()
161 * @brief A reference counted object may only be deleted by calling Unreference().
163 * The implementation should destroy the NativeImage resources.
166 ~NativeImageInterface() override = default;
170 * @brief Pointer to Dali::NativeImageInterface.
173 using NativeImageInterfacePtr = Dali::IntrusivePtr<NativeImageInterface>;
180 #endif // DALI_NATIVE_IMAGE_INTERFACE_H