am cf1edb3f: Merge "Fix libgui crop matrix test."

#include <utils/Log.h>

#include <utils/Thread.h>

EGLAPI const char* eglQueryStringImplementationANDROID(EGLDisplay dpy, EGLint name);

#define CROP_EXT_STR "EGL_ANDROID_image_crop"

namespace android {

class SurfaceTextureClientTest : public ::testing::Test {

}

TEST_F(SurfaceTextureClientTest, GetTransformMatrixSucceedsAfterFreeingBuffersWithCrop) {

    // Query to see if the image crop extension exists

    EGLDisplay dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);

    const char* exts = eglQueryStringImplementationANDROID(dpy, EGL_EXTENSIONS);

    size_t cropExtLen = strlen(CROP_EXT_STR);

    size_t extsLen = strlen(exts);

    bool equal = !strcmp(CROP_EXT_STR, exts);

    bool atStart = !strncmp(CROP_EXT_STR " ", exts, cropExtLen+1);

    bool atEnd = (cropExtLen+1) < extsLen &&

            !strcmp(" " CROP_EXT_STR, exts + extsLen - (cropExtLen+1));

    bool inMiddle = strstr(exts, " " CROP_EXT_STR " ");

    bool hasEglAndroidImageCrop = equal || atStart || atEnd || inMiddle;

    android_native_buffer_t* buf[3];

    float mtx[16] = {};

    android_native_rect_t crop;

    ASSERT_EQ(OK, native_window_set_buffer_count(mANW.get(), 6)); // frees buffers

    mST->getTransformMatrix(mtx);

    // This accounts for the .5 texel shrink for each edge that's included in the

    // transform matrix to avoid texturing outside the crop region.

    EXPECT_EQ(0.5, mtx[0]);

    // If the egl image crop extension is not present, this accounts for the

    // .5 texel shrink for each edge that's included in the transform matrix

    // to avoid texturing outside the crop region. Otherwise the crop is not

    // included in the transform matrix.

    EXPECT_EQ(hasEglAndroidImageCrop ? 1 : 0.5, mtx[0]);

    EXPECT_EQ(0.f, mtx[1]);

    EXPECT_EQ(0.f, mtx[2]);

    EXPECT_EQ(0.f, mtx[3]);

    EXPECT_EQ(0.f, mtx[4]);

    EXPECT_EQ(-0.5, mtx[5]);

    EXPECT_EQ(hasEglAndroidImageCrop ? -1 : -0.5, mtx[5]);

    EXPECT_EQ(0.f, mtx[6]);

    EXPECT_EQ(0.f, mtx[7]);

    EXPECT_EQ(1.f, mtx[10]);

    EXPECT_EQ(0.f, mtx[11]);

    EXPECT_EQ(0.0625f, mtx[12]);

    EXPECT_EQ(0.5625f, mtx[13]);

    EXPECT_EQ(hasEglAndroidImageCrop ? 0 : 0.0625f, mtx[12]);

    EXPECT_EQ(hasEglAndroidImageCrop ? 1 : 0.5625f, mtx[13]);

    EXPECT_EQ(0.f, mtx[14]);

    EXPECT_EQ(1.f, mtx[15]);

}