Add support for hardware buffers with protected content
Use EGL_EXT_protected_content extension if present to render
AHardwareBuffer with AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT.
Bug: skia:
Change-Id: I1a5fa4cdc8f432b89ae9ef889175b50a25b846e0
Reviewed-on: https://skia-review.googlesource.com/149803
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Stan Iliev <stani@google.com>
diff --git a/src/gpu/GrAHardwareBufferImageGenerator.cpp b/src/gpu/GrAHardwareBufferImageGenerator.cpp
index 9d7c27b..332f8c5 100644
--- a/src/gpu/GrAHardwareBufferImageGenerator.cpp
+++ b/src/gpu/GrAHardwareBufferImageGenerator.cpp
@@ -31,6 +31,33 @@
#include <GLES/gl.h>
#include <GLES/glext.h>
+#define PROT_CONTENT_EXT_STR "EGL_EXT_protected_content"
+#define EGL_PROTECTED_CONTENT_EXT 0x32C0
+
+static bool can_import_protected_content_eglimpl() {
+ EGLDisplay dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ const char* exts = eglQueryString(dpy, EGL_EXTENSIONS);
+ size_t cropExtLen = strlen(PROT_CONTENT_EXT_STR);
+ size_t extsLen = strlen(exts);
+ bool equal = !strcmp(PROT_CONTENT_EXT_STR, exts);
+ bool atStart = !strncmp(PROT_CONTENT_EXT_STR " ", exts, cropExtLen+1);
+ bool atEnd = (cropExtLen+1) < extsLen
+ && !strcmp(" " PROT_CONTENT_EXT_STR,
+ exts + extsLen - (cropExtLen+1));
+ bool inMiddle = strstr(exts, " " PROT_CONTENT_EXT_STR " ");
+ return equal || atStart || atEnd || inMiddle;
+}
+
+static bool can_import_protected_content(GrContext* context) {
+ if (kOpenGL_GrBackend == context->contextPriv().getBackend()) {
+ // Only compute whether the extension is present once the first time this
+ // function is called.
+ static bool hasIt = can_import_protected_content_eglimpl();
+ return hasIt;
+ }
+ return false;
+}
+
std::unique_ptr<SkImageGenerator> GrAHardwareBufferImageGenerator::Make(
AHardwareBuffer* graphicBuffer, SkAlphaType alphaType, sk_sp<SkColorSpace> colorSpace) {
AHardwareBuffer_Desc bufferDesc;
@@ -51,14 +78,16 @@
}
SkImageInfo info = SkImageInfo::Make(bufferDesc.width, bufferDesc.height, colorType,
alphaType, std::move(colorSpace));
+ bool createProtectedImage = 0 != (bufferDesc.usage & AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT);
return std::unique_ptr<SkImageGenerator>(new GrAHardwareBufferImageGenerator(info, graphicBuffer,
- alphaType));
+ alphaType, createProtectedImage));
}
GrAHardwareBufferImageGenerator::GrAHardwareBufferImageGenerator(const SkImageInfo& info,
- AHardwareBuffer* hardwareBuffer, SkAlphaType alphaType)
+ AHardwareBuffer* hardwareBuffer, SkAlphaType alphaType, bool isProtectedContent)
: INHERITED(info)
- , fHardwareBuffer(hardwareBuffer) {
+ , fHardwareBuffer(hardwareBuffer)
+ , fIsProtectedContent(isProtectedContent) {
AHardwareBuffer_acquire(fHardwareBuffer);
}
@@ -153,11 +182,14 @@
GrContext* context, AHardwareBuffer* hardwareBuffer,
int width, int height, GrPixelConfig config,
GrAHardwareBufferImageGenerator::DeleteImageProc* deleteProc,
- GrAHardwareBufferImageGenerator::DeleteImageCtx* deleteCtx) {
+ GrAHardwareBufferImageGenerator::DeleteImageCtx* deleteCtx,
+ bool isProtectedContent) {
while (GL_NO_ERROR != glGetError()) {} //clear GL errors
- EGLClientBuffer clientBuffer = eglGetNativeClientBufferANDROID(hardwareBuffer);
+ EGLClientBuffer clientBuffer = eglGetNativeClientBufferANDROID(hardwareBuffer);
EGLint attribs[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
+ isProtectedContent ? EGL_PROTECTED_CONTENT_EXT : EGL_NONE,
+ isProtectedContent ? EGL_TRUE : EGL_NONE,
EGL_NONE };
EGLDisplay display = eglGetCurrentDisplay();
// eglCreateImageKHR will add a ref to the AHardwareBuffer
@@ -218,13 +250,15 @@
GrContext* context, AHardwareBuffer* hardwareBuffer,
int width, int height, GrPixelConfig config,
GrAHardwareBufferImageGenerator::DeleteImageProc* deleteProc,
- GrAHardwareBufferImageGenerator::DeleteImageCtx* deleteCtx) {
+ GrAHardwareBufferImageGenerator::DeleteImageCtx* deleteCtx,
+ bool isProtectedContent) {
if (context->abandoned() || kOpenGL_GrBackend != context->contextPriv().getBackend()) {
// Check if GrContext is not abandoned and the backend is GL.
return GrBackendTexture();
}
+ bool createProtectedImage = isProtectedContent && can_import_protected_content(context);
return make_gl_backend_texture(context, hardwareBuffer, width, height, config, deleteProc,
- deleteCtx);
+ deleteCtx, createProtectedImage);
}
static void free_backend_texture(GrBackendTexture* backendTexture) {
@@ -295,9 +329,11 @@
AHardwareBuffer_acquire(hardwareBuffer);
GrTexture** ownedTexturePtr = &fOwnedTexture;
+ const bool isProtectedContent = fIsProtectedContent;
fCachedProxy = proxyProvider->createLazyProxy(
- [context, hardwareBuffer, width, height, pixelConfig, ownedTexturePtr]
+ [context, hardwareBuffer, width, height, pixelConfig, ownedTexturePtr,
+ isProtectedContent]
(GrResourceProvider* resourceProvider) {
if (!resourceProvider) {
AHardwareBuffer_release(hardwareBuffer);
@@ -312,7 +348,8 @@
GrBackendTexture backendTex = make_backend_texture(context, hardwareBuffer,
width, height, pixelConfig,
&deleteImageProc,
- &deleteImageCtx);
+ &deleteImageCtx,
+ isProtectedContent);
if (!backendTex.isValid()) {
return sk_sp<GrTexture>();
}
diff --git a/src/gpu/GrAHardwareBufferImageGenerator.h b/src/gpu/GrAHardwareBufferImageGenerator.h
index 58b5abf..3c6f678 100644
--- a/src/gpu/GrAHardwareBufferImageGenerator.h
+++ b/src/gpu/GrAHardwareBufferImageGenerator.h
@@ -47,7 +47,8 @@
bool willNeedMipMaps) override;
private:
- GrAHardwareBufferImageGenerator(const SkImageInfo&, AHardwareBuffer*, SkAlphaType);
+ GrAHardwareBufferImageGenerator(const SkImageInfo&, AHardwareBuffer*, SkAlphaType,
+ bool isProtectedContent);
void makeProxy(GrContext* context);
void releaseTextureRef();
@@ -63,6 +64,7 @@
uint32_t fOwningContextID = SK_InvalidGenID;
sk_sp<GrTextureProxy> fCachedProxy;
+ const bool fIsProtectedContent;
typedef SkImageGenerator INHERITED;
};