Add AHardwareBuffer_isSupported.
This new function will check whether a buffer with the given description
is allocatable. If the function returns false, buffer allocation will
never succeed. The current implementation performs a trial allocation
of a small buffer, but in the future this will be replaced by a HAL query.
Bug: 115660272
Test: Builds and passes CTS on Pixel 2.
Change-Id: Id0b1573ebf3194b1163324da773279da95782143
diff --git a/libs/nativewindow/AHardwareBuffer.cpp b/libs/nativewindow/AHardwareBuffer.cpp
index 7e26b0b..a19fe17 100644
--- a/libs/nativewindow/AHardwareBuffer.cpp
+++ b/libs/nativewindow/AHardwareBuffer.cpp
@@ -41,33 +41,11 @@
// ----------------------------------------------------------------------------
int AHardwareBuffer_allocate(const AHardwareBuffer_Desc* desc, AHardwareBuffer** outBuffer) {
- if (!outBuffer || !desc)
- return BAD_VALUE;
-
- if (!AHardwareBuffer_isValidPixelFormat(desc->format)) {
- ALOGE("Invalid AHardwareBuffer pixel format %u (%#x))", desc->format, desc->format);
- return BAD_VALUE;
- }
+ if (!outBuffer || !desc) return BAD_VALUE;
+ if (!AHardwareBuffer_isValidDescription(desc, /*log=*/true)) return BAD_VALUE;
int format = AHardwareBuffer_convertToPixelFormat(desc->format);
- if (desc->rfu0 != 0 || desc->rfu1 != 0) {
- ALOGE("AHardwareBuffer_Desc::rfu fields must be 0");
- return BAD_VALUE;
- }
-
- if (desc->format == AHARDWAREBUFFER_FORMAT_BLOB && desc->height != 1) {
- ALOGE("Height must be 1 when using the AHARDWAREBUFFER_FORMAT_BLOB format");
- return BAD_VALUE;
- }
-
- if ((desc->usage & (AHARDWAREBUFFER_USAGE_CPU_READ_MASK | AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK)) &&
- (desc->usage & AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT)) {
- ALOGE("AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT requires AHARDWAREBUFFER_USAGE_CPU_READ_NEVER "
- "and AHARDWAREBUFFER_USAGE_CPU_WRITE_NEVER");
- return BAD_VALUE;
- }
-
- uint64_t usage = AHardwareBuffer_convertToGrallocUsageBits(desc->usage);
+ uint64_t usage = AHardwareBuffer_convertToGrallocUsageBits(desc->usage);
sp<GraphicBuffer> gbuffer(new GraphicBuffer(
desc->width, desc->height, format, desc->layers, usage,
std::string("AHardwareBuffer pid [") + std::to_string(getpid()) + "]"));
@@ -122,19 +100,26 @@
if (usage & ~(AHARDWAREBUFFER_USAGE_CPU_READ_MASK |
AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK)) {
ALOGE("Invalid usage flags passed to AHardwareBuffer_lock; only "
- " AHARDWAREBUFFER_USAGE_CPU_* flags are allowed");
+ "AHARDWAREBUFFER_USAGE_CPU_* flags are allowed");
return BAD_VALUE;
}
usage = AHardwareBuffer_convertToGrallocUsageBits(usage);
- GraphicBuffer* gBuffer = AHardwareBuffer_to_GraphicBuffer(buffer);
+ GraphicBuffer* gbuffer = AHardwareBuffer_to_GraphicBuffer(buffer);
+
+ if (gbuffer->getLayerCount() > 1) {
+ ALOGE("Buffer with multiple layers passed to AHardwareBuffer_lock; "
+ "only buffers with one layer are allowed");
+ return INVALID_OPERATION;
+ }
+
Rect bounds;
if (!rect) {
- bounds.set(Rect(gBuffer->getWidth(), gBuffer->getHeight()));
+ bounds.set(Rect(gbuffer->getWidth(), gbuffer->getHeight()));
} else {
bounds.set(Rect(rect->left, rect->top, rect->right, rect->bottom));
}
- return gBuffer->lockAsync(usage, usage, bounds, outVirtualAddress, fence);
+ return gbuffer->lockAsync(usage, usage, bounds, outVirtualAddress, fence);
}
int AHardwareBuffer_unlock(AHardwareBuffer* buffer, int32_t* fence) {
@@ -274,6 +259,25 @@
return NO_ERROR;
}
+int AHardwareBuffer_isSupported(const AHardwareBuffer_Desc* desc) {
+ if (!desc) return 0;
+ if (!AHardwareBuffer_isValidDescription(desc, /*log=*/false)) return 0;
+
+ // Make a trial allocation.
+ // TODO(b/115660272): add implementation that uses a HAL query.
+ AHardwareBuffer_Desc trialDesc = *desc;
+ trialDesc.width = 4;
+ trialDesc.height = desc->format == AHARDWAREBUFFER_FORMAT_BLOB ? 1 : 4;
+ trialDesc.layers = desc->layers == 1 ? 1 : 2;
+ AHardwareBuffer* trialBuffer = nullptr;
+ int result = AHardwareBuffer_allocate(&trialDesc, &trialBuffer);
+ if (result == NO_ERROR) {
+ AHardwareBuffer_release(trialBuffer);
+ return 1;
+ }
+ return 0;
+}
+
// ----------------------------------------------------------------------------
// VNDK functions
@@ -322,14 +326,71 @@
namespace android {
-// A 1:1 mapping of AHardwaqreBuffer bitmasks to gralloc1 bitmasks.
-struct UsageMaskMapping {
- uint64_t hardwareBufferMask;
- uint64_t grallocMask;
-};
+bool AHardwareBuffer_isValidDescription(const AHardwareBuffer_Desc* desc, bool log) {
+ if (desc->width == 0 || desc->height == 0 || desc->layers == 0) {
+ ALOGE_IF(log, "Width, height and layers must all be nonzero");
+ return false;
+ }
-static inline bool containsBits(uint64_t mask, uint64_t bitsToCheck) {
- return (mask & bitsToCheck) == bitsToCheck && bitsToCheck;
+ if (!AHardwareBuffer_isValidPixelFormat(desc->format)) {
+ ALOGE_IF(log, "Invalid AHardwareBuffer pixel format %u (%#x))",
+ desc->format, desc->format);
+ return false;
+ }
+
+ if (desc->rfu0 != 0 || desc->rfu1 != 0) {
+ ALOGE_IF(log, "AHardwareBuffer_Desc::rfu fields must be 0");
+ return false;
+ }
+
+ if (desc->format == AHARDWAREBUFFER_FORMAT_BLOB) {
+ if (desc->height != 1 || desc->layers != 1) {
+ ALOGE_IF(log, "Height and layers must be 1 for AHARDWAREBUFFER_FORMAT_BLOB");
+ return false;
+ }
+ const uint64_t blobInvalidGpuMask =
+ AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE |
+ AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER |
+ AHARDWAREBUFFER_USAGE_GPU_MIPMAP_COMPLETE |
+ AHARDWAREBUFFER_USAGE_GPU_CUBE_MAP;
+ if (desc->usage & blobInvalidGpuMask) {
+ ALOGE_IF(log, "Invalid GPU usage flag for AHARDWAREBUFFER_FORMAT_BLOB; "
+ "only AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER is allowed");
+ return false;
+ }
+ if (desc->usage & AHARDWAREBUFFER_USAGE_VIDEO_ENCODE) {
+ ALOGE_IF(log, "AHARDWAREBUFFER_FORMAT_BLOB cannot be encoded as video");
+ return false;
+ }
+ } else {
+ if (desc->usage & AHARDWAREBUFFER_USAGE_SENSOR_DIRECT_DATA) {
+ ALOGE_IF(log, "AHARDWAREBUFFER_USAGE_SENSOR_DIRECT_DATA requires AHARDWAREBUFFER_FORMAT_BLOB");
+ return false;
+ }
+ if (desc->usage & AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER) {
+ ALOGE_IF(log, "AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER requires AHARDWAREBUFFER_FORMAT_BLOB");
+ return false;
+ }
+ }
+
+ if ((desc->usage & (AHARDWAREBUFFER_USAGE_CPU_READ_MASK | AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK)) &&
+ (desc->usage & AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT)) {
+ ALOGE_IF(log, "AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT requires AHARDWAREBUFFER_USAGE_CPU_READ_NEVER "
+ "and AHARDWAREBUFFER_USAGE_CPU_WRITE_NEVER");
+ return false;
+ }
+
+ if (desc->usage & AHARDWAREBUFFER_USAGE_GPU_CUBE_MAP) {
+ if (desc->width != desc->height) {
+ ALOGE_IF(log, "Cube maps must be square");
+ return false;
+ }
+ if (desc->layers % 6 != 0) {
+ ALOGE_IF(log, "Cube map layers must be a multiple of 6");
+ return false;
+ }
+ }
+ return true;
}
bool AHardwareBuffer_isValidPixelFormat(uint32_t format) {
@@ -445,7 +506,7 @@
"gralloc and AHardwareBuffer flags don't match");
static_assert(AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE == (uint64_t)BufferUsage::GPU_TEXTURE,
"gralloc and AHardwareBuffer flags don't match");
- static_assert(AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT == (uint64_t)BufferUsage::GPU_RENDER_TARGET,
+ static_assert(AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER == (uint64_t)BufferUsage::GPU_RENDER_TARGET,
"gralloc and AHardwareBuffer flags don't match");
static_assert(AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT == (uint64_t)BufferUsage::PROTECTED,
"gralloc and AHardwareBuffer flags don't match");