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Add comments describing shader programs

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PiperOrigin-RevId: 425885803
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andrewlewis 2022-02-02 16:03:31 +00:00 committed by Ian Baker
parent 134c33ba47
commit 0de79209c4
4 changed files with 19 additions and 0 deletions
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4
libraries/transformer/src/main/assets/shaders/fragment_shader_copy_external.glsl
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@ -11,6 +11,10 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and // See the License for the specific language governing permissions and
// limitations under the License. // limitations under the License.
// Fragment shader that samples from an external texture with uTexSampler,
// copying from this texture to the current output.
#extension GL_OES_EGL_image_external : require #extension GL_OES_EGL_image_external : require
precision mediump float; precision mediump float;
uniform samplerExternalOES uTexSampler; uniform samplerExternalOES uTexSampler;

7
libraries/transformer/src/main/assets/shaders/fragment_shader_copy_external_yuv_es3.glsl
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@ -12,6 +12,13 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and // See the License for the specific language governing permissions and
// limitations under the License. // limitations under the License.
// ES 3 fragment shader that samples from an external texture with uTexSampler,
// copying from this texture to the current output while applying the specified
// color transform uColorTransform, which should be a YUV to RGB conversion
// matrix. The sampler uses the using the EXT_YUV_target extension:
// https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_YUV_target.txt.
#extension GL_OES_EGL_image_external : require #extension GL_OES_EGL_image_external : require
#extension GL_EXT_YUV_target : require #extension GL_EXT_YUV_target : require
precision mediump float; precision mediump float;

4
libraries/transformer/src/main/assets/shaders/vertex_shader_transformation.glsl
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@ -11,6 +11,10 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and // See the License for the specific language governing permissions and
// limitations under the License. // limitations under the License.
// Vertex shader that applies the 4 * 4 transformation matrix
// uTransformationMatrix.
attribute vec4 aFramePosition; attribute vec4 aFramePosition;
attribute vec4 aTexCoords; attribute vec4 aTexCoords;
uniform mat4 uTexTransform; uniform mat4 uTexTransform;

4
libraries/transformer/src/main/assets/shaders/vertex_shader_transformation_es3.glsl
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@ -12,6 +12,10 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and // See the License for the specific language governing permissions and
// limitations under the License. // limitations under the License.
// ES 3 vertex shader that applies the 4 * 4 transformation matrix
// uTransformationMatrix.
in vec4 aFramePosition; in vec4 aFramePosition;
in vec4 aTexCoords; in vec4 aTexCoords;
uniform mat4 uTexTransform; uniform mat4 uTexTransform;