提交 937cc871 编写于 作者: S shegangbin

fix

Signed-off-by: Nshegangbin <shegangbin1@huawei.com>
上级 21d908b5
......@@ -23,11 +23,12 @@ NativeBuffer是`OpenHarmony`提供**共享内存**的模块。开发者可以通
## 开发步骤
以下步骤描述了在**OpenHarmony**中如何使用`NativeBuffer`提供的`NAPI`接口,创建`OH_NativeBuffer`实例获取内存的属性信息,并把对应的ION内存映射到进程空间。
以下步骤描述了在**OpenHarmony**中如何使用`NativeBuffer`提供的Native API接口,创建`OH_NativeBuffer`实例获取内存的属性信息,并把对应的ION内存映射到进程空间。
**头文件**
```c++
#include <native_buffer/native_buffer.h>
```
```c++
#include <native_buffer/native_buffer.h>
```
1. **创建OH_NativeBuffer实例**
```c++
......@@ -37,7 +38,7 @@ NativeBuffer是`OpenHarmony`提供**共享内存**的模块。开发者可以通
};
OH_NativeBuffer* buffer = OH_NativeBuffer_Alloc(&config);
if (buffer == nullptr) {
return;
std::cout << "OH_NativeBuffer_Alloc Failed" << std::endl;
}
```
......@@ -45,15 +46,16 @@ NativeBuffer是`OpenHarmony`提供**共享内存**的模块。开发者可以通
应用如需要访问这块buffer的内存空间,需要通过OH_NativeBuffer_Map接口将buffer对应的ION内存映射到进程空间
```c++
// 将ION内存映射到进程空间
void* virAddr = nullptr;
int32_t ret = OH_NativeBuffer_Map(buffer, &virAddr); // 映射后通过第二个参数virAddr返回内存的首地址
if (ret != OHOS::GSERROR_OK) {
return;
if (ret != 0) {
std::cout << "OH_NativeBuffer_Map Failed" << std::endl;
}
// 使用后请及时将OH_NativeBuffer对应的ION内存从进程空间移除
ret = OH_NativeBuffer_Unmap(buffer);
if (ret != OHOS::GSERROR_OK) {
return;
if (ret != 0) {
std::cout << "OH_NativeBuffer_Unmap Failed" << std::endl;
}
```
......@@ -70,7 +72,7 @@ NativeBuffer是`OpenHarmony`提供**共享内存**的模块。开发者可以通
```c++
// 调用OH_NativeBuffer_Unreference引用计数减1,之后buffer的引用计数为0,buffer会销毁
ret = OH_NativeBuffer_Unreference(buffer);
if (ret != OHOS::GSERROR_OK) {
return;
if (ret != 0) {
std::cout << "OH_NativeBuffer_Unreference Failed" << std::endl;
}
```
\ No newline at end of file
......@@ -25,17 +25,19 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
## 开发步骤
以下步骤描述了在**OpenHarmony**中如何使用`NativeImage`提供的Native API接口,创建`OH_NativeImage`实例作为消费者端,将数据内容更新到OpenGL外部纹理上。
**头文件**
```c++
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES3/gl3.h>
#include <native_image/native_image.h>
#include <native_window/external_window.h>
#include <native_buffer/native_buffer.h>
```
```c++
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES3/gl3.h>
#include <native_image/native_image.h>
#include <native_window/external_window.h>
#include <native_buffer/native_buffer.h>
```
1. **初始化EGL环境**
这里提供一份初始化EGL环境的代码示例
```c++
#include <EGL/egl.h>
......@@ -51,6 +53,7 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
EGLDisplay eglDisplay_ = EGL_NO_DISPLAY;
static inline EGLConfig config_;
// 检查egl扩展
static bool CheckEglExtension(const char* extensions, const char* extension)
{
size_t extlen = strlen(extension);
......@@ -71,6 +74,7 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
return false;
}
// 获取当前的显示设备
static EGLDisplay GetPlatformEglDisplay(EGLenum platform, void* native_display, const EGLint* attrib_list)
{
static GetPlatformDisplayExt eglGetPlatformDisplayExt = NULL;
......@@ -93,16 +97,19 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
static void InitEGLEnv()
{
// 获取当前的显示设备
eglDisplay_ = GetPlatformEglDisplay(EGL_PLATFORM_OHOS_KHR, EGL_DEFAULT_DISPLAY, NULL);
if (eglDisplay_ == EGL_NO_DISPLAY) {
std::cout << "Failed to create EGLDisplay gl errno : " << eglGetError() << std::endl;
}
EGLint major, minor;
// 初始化EGLDisplay
if (eglInitialize(eglDisplay_, &major, &minor) == EGL_FALSE) {
std::cout << "Failed to initialize EGLDisplay" << std::endl;
}
// 绑定图形绘制的API为OpenGLES
if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE) {
std::cout << "Failed to bind OpenGL ES API" << std::endl;
}
......@@ -112,6 +119,7 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
EGLint config_attribs[] = { EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_RED_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8, EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT, EGL_NONE };
// 获取一个有效的系统配置信息
ret = eglChooseConfig(eglDisplay_, config_attribs, &config_, 1, &count);
if (!(ret && static_cast<unsigned int>(count) >= 1)) {
std::cout << "Failed to eglChooseConfig" << std::endl;
......@@ -119,13 +127,16 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
static const EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, EGL_CONTEXT_CLIENT_VERSION_NUM, EGL_NONE };
// 创建上下文
eglContext_ = eglCreateContext(eglDisplay_, config_, EGL_NO_CONTEXT, context_attribs);
if (eglContext_ == EGL_NO_CONTEXT) {
std::cout << "Failed to create egl context %{public}x, error:" << eglGetError() << std::endl;
}
// 关联上下文
eglMakeCurrent(eglDisplay_, EGL_NO_SURFACE, EGL_NO_SURFACE, eglContext_);
// EGL环境初始化完成
std::cout << "Create EGL context successfully, version" << major << "." << minor << std::endl;
}
```
......@@ -177,26 +188,24 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
// 通过OH_NativeWindow_NativeWindowFlushBuffer 提交给消费者使用,例如:显示在屏幕上。
OH_NativeWindow_NativeWindowFlushBuffer(nativeWindow, buffer, fenceFd, region);
```
5. 用完需要销毁NativeWindow
```c++
OH_NativeWindow_DestroyNativeWindow(nativeWindow);
```
5. **更新内容到OpenGL纹理**
```c++
// 更新内容到OpenGL纹理。
int32_t ret = OH_NativeImage_UpdateSurfaceImage(image);
if (ret != SURFACE_ERROR_OK) {
if (ret != 0) {
std::cout << "OH_NativeImage_UpdateSurfaceImage failed" << std::endl;
return -1;
}
// 获取最近调用OH_NativeImage_UpdateSurfaceImage的纹理图像的时间戳和变化矩阵。
int64_t timeStamp = OH_NativeImage_GetTimestamp(image);
if (timeStamp == SURFACE_ERROR_ERROR) {
std::cout << "OH_NativeImage_GetTimestamp failed" << std::endl;
return -1;
}
float matrix[16];
ret = OH_NativeImage_GetTransformMatrix(image, matrix);
if (ret != SURFACE_ERROR_OK) {
if (ret != 0) {
std::cout << "OH_NativeImage_GetTransformMatrix failed" << std::endl;
return -1;
}
```
......@@ -204,12 +213,17 @@ NativeImage是`OpenHarmony`提供**Surface关联OpenGL外部纹理**的模块,
```c++
// 将OH_NativeImage实例从当前OpenGL ES上下文分离
ret = OH_NativeImage_DetachContext(image);
if (ret != SURFACE_ERROR_OK) {
if (ret != 0) {
std::cout << "OH_NativeImage_DetachContext failed" << std::endl;
return -1;
}
// 将OH_NativeImage实例附加到当前OpenGL ES上下文, 且该OpenGL ES纹理会绑定到 GL_TEXTURE_EXTERNAL_OES, 并通过OH_NativeImage进行更新
GLuint textureId2;
glGenTextures(1, &textureId2);
ret = OH_NativeImage_AttachContext(image, textureId2);
```
7. **OH_NativeImage实例使用完需要销毁掉**
```c++
// 销毁OH_NativeImage实例
OH_NativeImage_Destroy(&image);
```
......@@ -18,10 +18,11 @@ NativeVsync模块用来获取系统VSync信号,提供了OH_NativeVSync实例
## 开发步骤
以下步骤描述了在**OpenHarmony**中如何使用`NativeVsync`提供的Native API接口,创建和销毁`OH_NativeVsync`实例,以及如何设置VSync回调函数。
**头文件**
```c++
#include <native_vsync/native_vsync.h>
```
```c++
#include <native_vsync/native_vsync.h>
```
1. **首先需要准备一个VSync回调函数**
```c++
......
......@@ -5,7 +5,7 @@
NativeWindow是`OpenHarmony`**本地平台化窗口**,表示图形队列的生产者端。开发者可以通过`NativeWindow`接口进行申请和提交`Buffer`,配置`Buffer`属性信息。
针对NativeWindow,常见的开发场景如下:
* 通过`NativeWindow`提供的`NAPI`接口申请图形`Buffer`,并将生产图形内容写入图形`Buffer`,最终提交`Buffer`到图形队列
* 通过`NativeWindow`提供的Native API接口申请图形`Buffer`,并将生产图形内容写入图形`Buffer`,最终提交`Buffer`到图形队列
* 在适配EGL层的`eglswapbuffer`接口时,进行申请和提交`Buffer`
## 接口说明
......@@ -20,11 +20,12 @@ NativeWindow是`OpenHarmony`**本地平台化窗口**,表示图形队列的生
## 开发步骤
以下步骤描述了在**OpenHarmony**中如何使用`NativeWindow`提供的`NAPI`接口,申请图形`Buffer`,并将生产图形内容写入图形`Buffer`后,最终提交`Buffer`到图形队列。
以下步骤描述了在**OpenHarmony**中如何使用`NativeWindow`提供的Native API接口,申请图形`Buffer`,并将生产图形内容写入图形`Buffer`后,最终提交`Buffer`到图形队列。
**头文件**
```c++
#include <native_window/external_window.h>
```
```c++
#include <native_window/external_window.h>
```
1. **获取OHNativeWindow实例**。可在[`OH_NativeXComponent_Callback`](../reference/native-apis/_o_h___native_x_component___callback.md)提供的接口中获取。
1. 在xxx.ets 中定义 XComponent。
......@@ -89,30 +90,30 @@ NativeWindow是`OpenHarmony`**本地平台化窗口**,表示图形队列的生
OH_NativeXComponent_RegisterCallback(nativeXComponent, &callback_);
```
2. **设置NativeWindowBuffer的属性**。使用`OH_NativeWindow_NativeWindowHandleOpt`设置`NativeWindowBuffer`的属性。
2. **设置OHNativeWindowBuffer的属性**。使用`OH_NativeWindow_NativeWindowHandleOpt`设置`OHNativeWindowBuffer`的属性。
```c++
// 设置 NativeWindowBuffer 的宽高
// 设置 OHNativeWindowBuffer 的宽高
code = SET_BUFFER_GEOMETRY;
int32_t width = 0x100;
int32_t height = 0x100;
ret = OH_NativeWindow_NativeWindowHandleOpt(nativeWindow, code, width, height);
// 设置 NativeWindowBuffer 的步长
// 设置 OHNativeWindowBuffer 的步长
code = SET_STRIDE;
int32_t stride = 0x8;
ret = OH_NativeWindow_NativeWindowHandleOpt(nativeWindow, code, stride);
```
3. **从图形队列申请NativeWindowBuffer**
3. **从图形队列申请OHNativeWindowBuffer**
```c++
struct NativeWindowBuffer* buffer = nullptr;
OHNativeWindowBuffer* buffer = nullptr;
int fenceFd;
// 通过 OH_NativeWindow_NativeWindowRequestBuffer 获取 NativeWindowBuffer 实例
// 通过 OH_NativeWindow_NativeWindowRequestBuffer 获取 OHNativeWindowBuffer 实例
OH_NativeWindow_NativeWindowRequestBuffer(nativeWindow_, &buffer, &fenceFd);
// 通过 OH_NativeWindow_GetNativeBufferHandleFromNative 获取 buffer 的 handle
BufferHandle* bufferHandle = OH_NativeWindow_GetNativeBufferHandleFromNative(buffer);
```
4. **将生产的内容写入NativeWindowBuffer**
4. **将生产的内容写入OHNativeWindowBuffer**
```c++
auto image = static_cast<uint8_t *>(buffer->sfbuffer->GetVirAddr());
static uint32_t value = 0x00;
......@@ -126,9 +127,9 @@ NativeWindow是`OpenHarmony`**本地平台化窗口**,表示图形队列的生
}
```
5. **提交NativeWindowBuffer到图形队列**
5. **提交OHNativeWindowBuffer到图形队列**
```c++
// 设置刷新区域,如果Region中的Rect为nullptr,或者rectNumber为0,则认为NativeWindowBuffer全部有内容更改。
// 设置刷新区域,如果Region中的Rect为nullptr,或者rectNumber为0,则认为OHNativeWindowBuffer全部有内容更改。
Region region{nullptr, 0};
// 通过OH_NativeWindow_NativeWindowFlushBuffer 提交给消费者使用,例如:显示在屏幕上。
OH_NativeWindow_NativeWindowFlushBuffer(nativeWindow_, buffer, fenceFd, region);
......
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