gfxstream: guest: introduce Gralloc::getGrallocType()

This API tells the user whether the chosen
implementation is goldfish gralloc, cros_gralloc
(minigbm), or emulated gralloc.

Use with caution.

Reviewed-by: Aaron Ruby <aruby@blackberry.com>
Acked-by: Yonggang Luo <luoyonggang@gmail.com>
Acked-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27246>

src/gfxstream/guest/android/GrallocEmulated.cpp

@@ -414,6 +414,8 @@ EmulatedGralloc::~EmulatedGralloc() {
     delete mDevice;
 }
 
+GrallocType EmulatedGralloc::getGrallocType() { return GRALLOC_TYPE_EMULATED; }
+
 uint32_t EmulatedGralloc::createColorBuffer(void*, int width, int height, uint32_t glFormat) {
     auto drmFormat = GlFormatToDrmFormat(glFormat);
     if (!drmFormat) {

src/gfxstream/guest/android/GrallocEmulated.h

@@ -67,6 +67,8 @@ class EmulatedGralloc : public Gralloc {
    public:
     EmulatedGralloc(VirtGpuDevice* device);
     ~EmulatedGralloc();
+
+    GrallocType getGrallocType() override;
     uint32_t createColorBuffer(void*, int width, int height, uint32_t glFormat) override;
 
     int allocate(uint32_t width, uint32_t height, uint32_t format, uint64_t usage,

src/gfxstream/guest/android/GrallocGoldfish.cpp

@@ -26,6 +26,8 @@ uint32_t GoldfishGralloc::createColorBuffer(void* rcEnc, int width, int height,
     return rc->rcCreateColorBuffer(rc, width, height, glformat);
 }
 
+GrallocType GoldfishGralloc::getGrallocType() { return GRALLOC_TYPE_GOLDFISH; }
+
 int GoldfishGralloc::allocate(uint32_t width, uint32_t height, uint32_t format, uint64_t usage,
                               AHardwareBuffer** outputAhb) {
     struct AHardwareBuffer_Desc desc = {

src/gfxstream/guest/android/GrallocGoldfish.h

@@ -20,6 +20,7 @@ namespace gfxstream {
 
 class GoldfishGralloc : public Gralloc {
    public:
+    GrallocType getGrallocType() override;
     uint32_t createColorBuffer(void* rcEnc, int width, int height, uint32_t glformat) override;
 
     int allocate(uint32_t width, uint32_t height, uint32_t format, uint64_t usage,

src/gfxstream/guest/android/GrallocMinigbm.cpp

@@ -112,6 +112,8 @@ bool getVirtioGpuResourceInfo(int fd, native_handle_t const* handle,
 
 }  // namespace
 
+GrallocType MinigbmGralloc::getGrallocType() { return GRALLOC_TYPE_MINIGBM; }
+
 uint32_t MinigbmGralloc::createColorBuffer(void*, int width, int height, uint32_t glformat) {
     // Only supported format for pbuffers in gfxstream should be RGBA8
     const uint32_t kVirglFormatRGBA = 67;  // VIRGL_FORMAT_R8G8B8A8_UNORM;

src/gfxstream/guest/android/GrallocMinigbm.h

@@ -20,6 +20,8 @@ namespace gfxstream {
 
 class MinigbmGralloc : public Gralloc {
    public:
+    GrallocType getGrallocType() override;
+
     uint32_t createColorBuffer(void* rcEnc, int width, int height, uint32_t glformat) override;
 
     int allocate(uint32_t width, uint32_t height, uint32_t format, uint64_t usage,