am 122dd099: Merge "SurfaceTexture: fix transform matrix computation." into honeycomb-mr1 (c6a4156f) · Commits · e / os / android_frameworks_native

libs/gui/SurfaceTexture.cpp

+37 −6

Original line number	Diff line number	Diff line
		@@ -283,11 +283,42 @@ void SurfaceTexture::getTransformMatrix(float mtx[16]) {
		sp<GraphicBuffer>& buf(mSlots[mCurrentTexture].mGraphicBuffer);
		float tx, ty, sx, sy;
		if (!mCurrentCrop.isEmpty()) {
		tx = float(mCurrentCrop.left) / float(buf->getWidth());
		ty = float(buf->getHeight() - mCurrentCrop.bottom) /
		// In order to prevent bilinear sampling at the of the crop rectangle we
		// may need to shrink it by 2 texels in each direction. Normally this
		// would just need to take 1/2 a texel off each end, but because the
		// chroma channels will likely be subsampled we need to chop off a whole
		// texel. This will cause artifacts if someone does nearest sampling
		// with 1:1 pixel:texel ratio, but it's impossible to simultaneously
		// accomodate the bilinear and nearest sampling uses.
		//
		// If nearest sampling turns out to be a desirable usage of these
		// textures then we could add the ability to switch a SurfaceTexture to
		// nearest-mode. Preferably, however, the image producers (video
		// decoder, camera, etc.) would simply not use a crop rectangle (or at
		// least not tell the framework about it) so that the GPU can do the
		// correct edge behavior.
		int xshrink = 0, yshrink = 0;
		if (mCurrentCrop.left > 0) {
		tx = float(mCurrentCrop.left + 1) / float(buf->getWidth());
		xshrink++;
		} else {
		tx = 0.0f;
		}
		if (mCurrentCrop.right < buf->getWidth()) {
		xshrink++;
		}
		if (mCurrentCrop.bottom < buf->getHeight()) {
		ty = (float(buf->getHeight() - mCurrentCrop.bottom) + 1.0f) /
		float(buf->getHeight());
		sx = float(mCurrentCrop.width()) / float(buf->getWidth());
		sy = float(mCurrentCrop.height()) / float(buf->getHeight());
		yshrink++;
		} else {
		ty = 0.0f;
		}
		if (mCurrentCrop.top > 0) {
		yshrink++;
		}
		sx = float(mCurrentCrop.width() - xshrink) / float(buf->getWidth());
		sy = float(mCurrentCrop.height() - yshrink) / float(buf->getHeight());
		} else {
		tx = 0.0f;
		ty = 0.0f;
		@@ -298,7 +329,7 @@ void SurfaceTexture::getTransformMatrix(float mtx[16]) {
		sx, 0, 0, 0,
		0, sy, 0, 0,
		0, 0, 1, 0,
		sxtx, syty, 0, 1,
		tx, ty, 0, 1,
		};

		float mtxBeforeFlipV[16];

libs/gui/tests/Android.mk

+17 −19

Original line number	Diff line number	Diff line
		@@ -4,39 +4,37 @@ include $(CLEAR_VARS)

		ifneq ($(TARGET_SIMULATOR),true)

		# Build the unit tests.
		test_src_files := \
		LOCAL_MODULE := SurfaceTexture_test

		LOCAL_MODULE_TAGS := tests

		LOCAL_SRC_FILES := \
		SurfaceTextureClient_test.cpp \
		SurfaceTexture_test.cpp \

		shared_libraries := \
		libcutils \
		libutils \
		LOCAL_SHARED_LIBRARIES := \
		libEGL \
		libGLESv2 \
		libandroid \
		libbinder \
		libcutils \
		libgui \
		libstlport \
		libsurfaceflinger_client \
		libui \
		libutils \

		static_libraries := \
		LOCAL_STATIC_LIBRARIES := \
		libgtest \
		libgtest_main \

		c_includes := \
		LOCAL_C_INCLUDES := \
		bionic \
		bionic/libstdc++/include \
		external/gtest/include \
		external/stlport/stlport \

		module_tags := tests

		$(foreach file,$(test_src_files), \
		$(eval include $(CLEAR_VARS)) \
		$(eval LOCAL_SHARED_LIBRARIES := $(shared_libraries)) \
		$(eval LOCAL_STATIC_LIBRARIES := $(static_libraries)) \
		$(eval LOCAL_C_INCLUDES := $(c_includes)) \
		$(eval LOCAL_SRC_FILES := $(file)) \
		$(eval LOCAL_MODULE := $(notdir $(file:%.cpp=%))) \
		$(eval LOCAL_MODULE_TAGS := $(module_tags)) \
		$(eval include $(BUILD_EXECUTABLE)) \
		)
		include $(BUILD_EXECUTABLE)

		# Build the manual test programs.
		include $(call all-subdir-makefiles)

libs/gui/tests/SurfaceTexture_test.cpp

0 → 100644

+621 −0

File added.

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