Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d538d30e authored by xiaozhengdong's avatar xiaozhengdong
Browse files

hwui: add extension to support unpack operations in OpenGL ES 2.0 



OpenGL ES 3.0+ lets us specify the row length for unpack operations
such as glTexSubImage2D(). This allows us to upload a sub-rectangle
of a texture. Also, the GL_EXT_unpack_subimage extension can also
support this feature in OpenGL ES 2.0

Change-Id: Id43c2c55c5eaefbace67087c955f0b4324fb2c35
Signed-off-by: default avatarxiaozhengdong <xiaozhengdong@xiaomi.com>
parent 40f0efe0

libs/hwui/Extensions.cpp

+1 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ Extensions::Extensions(): Singleton<Extensions>() { 
    mHasTiledRendering = hasGlExtension("GL_QCOM_tiled_rendering");

    mHas1BitStencil = hasGlExtension("GL_OES_stencil1");

    mHas4BitStencil = hasGlExtension("GL_OES_stencil4");

    mHasUnpackSubImage = hasGlExtension("GL_EXT_unpack_subimage");



    // Query EGL extensions

    findExtensions(eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS), mEglExtensionList);

libs/hwui/Extensions.h

+2 −1
Original line number Diff line number Diff line
@@ -41,7 +41,7 @@ public: 
    inline bool has1BitStencil() const { return mHas1BitStencil; }

    inline bool has4BitStencil() const { return mHas4BitStencil; }

    inline bool hasNvSystemTime() const { return mHasNvSystemTime; }

    inline bool hasUnpackRowLength() const { return mVersionMajor >= 3; }

    inline bool hasUnpackRowLength() const { return mVersionMajor >= 3 || mHasUnpackSubImage; }

    inline bool hasPixelBufferObjects() const { return mVersionMajor >= 3; }

    inline bool hasOcclusionQueries() const { return mVersionMajor >= 3; }

    inline bool hasFloatTextures() const { return mVersionMajor >= 3; }
@@ -74,6 +74,7 @@ private: 
    bool mHas1BitStencil;

    bool mHas4BitStencil;

    bool mHasNvSystemTime;

    bool mHasUnpackSubImage;



    int mVersionMajor;

    int mVersionMinor;