[RenderEngine] Introduce non-linear display color transform.
A display color transform is a non-linear color matrix that should be
applied in gamma space. Previously the non-linear display color transform
is mixed into the linear color matrix that results in incorrect color
inversion behaviour.
RenderEngineTest
fix fillBufferColorTransform calling wrong function
fillBufferColorTransform display color transform set to 0.9f
add renderengine object for useColorManagement enabled,
to test color management affected on display and layer color transform
Bug: 157203983
Test: color inversion
Test: run RenderEngineTest
Change-Id: Ic731f014a14795b80323eeaf929761c828150f91
diff --git a/libs/renderengine/gl/GLESRenderEngine.cpp b/libs/renderengine/gl/GLESRenderEngine.cpp
index 6adcbea..5bded99 100644
--- a/libs/renderengine/gl/GLESRenderEngine.cpp
+++ b/libs/renderengine/gl/GLESRenderEngine.cpp
@@ -1121,6 +1121,7 @@
setOutputDataSpace(display.outputDataspace);
setDisplayMaxLuminance(display.maxLuminance);
+ setDisplayColorTransform(display.colorTransform);
const mat4 projectionMatrix =
ui::Transform(display.orientation).asMatrix4() * mState.projectionMatrix;
@@ -1189,7 +1190,7 @@
position[3] = vec2(bounds.right, bounds.top);
setupLayerCropping(*layer, mesh);
- setColorTransform(display.colorTransform * layer->colorTransform);
+ setColorTransform(layer->colorTransform);
bool usePremultipliedAlpha = true;
bool disableTexture = true;
@@ -1346,6 +1347,10 @@
mState.colorMatrix = colorTransform;
}
+void GLESRenderEngine::setDisplayColorTransform(const mat4& colorTransform) {
+ mState.displayColorMatrix = colorTransform;
+}
+
void GLESRenderEngine::disableTexturing() {
mState.textureEnabled = false;
}
diff --git a/libs/renderengine/gl/GLESRenderEngine.h b/libs/renderengine/gl/GLESRenderEngine.h
index 1779994..c0449a1 100644
--- a/libs/renderengine/gl/GLESRenderEngine.h
+++ b/libs/renderengine/gl/GLESRenderEngine.h
@@ -168,6 +168,7 @@
void setupLayerTexturing(const Texture& texture);
void setupFillWithColor(float r, float g, float b, float a);
void setColorTransform(const mat4& colorTransform);
+ void setDisplayColorTransform(const mat4& colorTransform);
void disableTexturing();
void disableBlending();
void setupCornerRadiusCropSize(float width, float height);
diff --git a/libs/renderengine/gl/Program.cpp b/libs/renderengine/gl/Program.cpp
index f4fbf35..a172c56 100644
--- a/libs/renderengine/gl/Program.cpp
+++ b/libs/renderengine/gl/Program.cpp
@@ -66,6 +66,7 @@
mTextureMatrixLoc = glGetUniformLocation(programId, "texture");
mSamplerLoc = glGetUniformLocation(programId, "sampler");
mColorLoc = glGetUniformLocation(programId, "color");
+ mDisplayColorMatrixLoc = glGetUniformLocation(programId, "displayColorMatrix");
mDisplayMaxLuminanceLoc = glGetUniformLocation(programId, "displayMaxLuminance");
mMaxMasteringLuminanceLoc = glGetUniformLocation(programId, "maxMasteringLuminance");
mMaxContentLuminanceLoc = glGetUniformLocation(programId, "maxContentLuminance");
@@ -129,6 +130,9 @@
const float color[4] = {desc.color.r, desc.color.g, desc.color.b, desc.color.a};
glUniform4fv(mColorLoc, 1, color);
}
+ if (mDisplayColorMatrixLoc >= 0) {
+ glUniformMatrix4fv(mDisplayColorMatrixLoc, 1, GL_FALSE, desc.displayColorMatrix.asArray());
+ }
if (mInputTransformMatrixLoc >= 0) {
mat4 inputTransformMatrix = desc.inputTransformMatrix;
glUniformMatrix4fv(mInputTransformMatrixLoc, 1, GL_FALSE, inputTransformMatrix.asArray());
diff --git a/libs/renderengine/gl/Program.h b/libs/renderengine/gl/Program.h
index fc3755e..4292645 100644
--- a/libs/renderengine/gl/Program.h
+++ b/libs/renderengine/gl/Program.h
@@ -104,6 +104,7 @@
/* location of transform matrix */
GLint mInputTransformMatrixLoc;
GLint mOutputTransformMatrixLoc;
+ GLint mDisplayColorMatrixLoc;
/* location of corner radius uniform */
GLint mCornerRadiusLoc;
diff --git a/libs/renderengine/gl/ProgramCache.cpp b/libs/renderengine/gl/ProgramCache.cpp
index 3ae35ec..7fc0499 100644
--- a/libs/renderengine/gl/ProgramCache.cpp
+++ b/libs/renderengine/gl/ProgramCache.cpp
@@ -180,6 +180,9 @@
description.hasOutputTransformMatrix() || description.hasColorMatrix()
? Key::OUTPUT_TRANSFORM_MATRIX_ON
: Key::OUTPUT_TRANSFORM_MATRIX_OFF)
+ .set(Key::Key::DISPLAY_COLOR_TRANSFORM_MATRIX_MASK,
+ description.hasDisplayColorMatrix() ? Key::DISPLAY_COLOR_TRANSFORM_MATRIX_ON
+ : Key::DISPLAY_COLOR_TRANSFORM_MATRIX_OFF)
.set(Key::ROUNDED_CORNERS_MASK,
description.cornerRadius > 0 ? Key::ROUNDED_CORNERS_ON : Key::ROUNDED_CORNERS_OFF)
.set(Key::SHADOW_MASK, description.drawShadows ? Key::SHADOW_ON : Key::SHADOW_OFF);
@@ -661,7 +664,8 @@
)__SHADER__";
}
- if (needs.hasTransformMatrix() || (needs.getInputTF() != needs.getOutputTF())) {
+ if (needs.hasTransformMatrix() || (needs.getInputTF() != needs.getOutputTF()) ||
+ needs.hasDisplayColorMatrix()) {
if (needs.needsToneMapping()) {
fs << "uniform float displayMaxLuminance;";
fs << "uniform float maxMasteringLuminance;";
@@ -700,6 +704,21 @@
)__SHADER__";
}
+ if (needs.hasDisplayColorMatrix()) {
+ fs << "uniform mat4 displayColorMatrix;";
+ fs << R"__SHADER__(
+ highp vec3 DisplayColorMatrix(const highp vec3 color) {
+ return clamp(vec3(displayColorMatrix * vec4(color, 1.0)), 0.0, 1.0);
+ }
+ )__SHADER__";
+ } else {
+ fs << R"__SHADER__(
+ highp vec3 DisplayColorMatrix(const highp vec3 color) {
+ return color;
+ }
+ )__SHADER__";
+ }
+
generateEOTF(fs, needs);
generateOOTF(fs, needs);
generateOETF(fs, needs);
@@ -732,14 +751,17 @@
}
}
- if (needs.hasTransformMatrix() || (needs.getInputTF() != needs.getOutputTF())) {
+ if (needs.hasTransformMatrix() || (needs.getInputTF() != needs.getOutputTF()) ||
+ needs.hasDisplayColorMatrix()) {
if (!needs.isOpaque() && needs.isPremultiplied()) {
// un-premultiply if needed before linearization
// avoid divide by 0 by adding 0.5/256 to the alpha channel
fs << "gl_FragColor.rgb = gl_FragColor.rgb / (gl_FragColor.a + 0.0019);";
}
fs << "gl_FragColor.rgb = "
- "OETF(OutputTransform(OOTF(InputTransform(EOTF(gl_FragColor.rgb)))));";
+ "DisplayColorMatrix(OETF(OutputTransform(OOTF(InputTransform(EOTF(gl_FragColor.rgb)))"
+ ")));";
+
if (!needs.isOpaque() && needs.isPremultiplied()) {
// and re-premultiply if needed after gamma correction
fs << "gl_FragColor.rgb = gl_FragColor.rgb * (gl_FragColor.a + 0.0019);";
diff --git a/libs/renderengine/gl/ProgramCache.h b/libs/renderengine/gl/ProgramCache.h
index 901e631..37bb651 100644
--- a/libs/renderengine/gl/ProgramCache.h
+++ b/libs/renderengine/gl/ProgramCache.h
@@ -117,6 +117,11 @@
SHADOW_MASK = 1 << SHADOW_SHIFT,
SHADOW_OFF = 0 << SHADOW_SHIFT,
SHADOW_ON = 1 << SHADOW_SHIFT,
+
+ DISPLAY_COLOR_TRANSFORM_MATRIX_SHIFT = 14,
+ DISPLAY_COLOR_TRANSFORM_MATRIX_MASK = 1 << DISPLAY_COLOR_TRANSFORM_MATRIX_SHIFT,
+ DISPLAY_COLOR_TRANSFORM_MATRIX_OFF = 0 << DISPLAY_COLOR_TRANSFORM_MATRIX_SHIFT,
+ DISPLAY_COLOR_TRANSFORM_MATRIX_ON = 1 << DISPLAY_COLOR_TRANSFORM_MATRIX_SHIFT,
};
inline Key() : mKey(0) {}
@@ -143,6 +148,10 @@
inline bool hasOutputTransformMatrix() const {
return (mKey & OUTPUT_TRANSFORM_MATRIX_MASK) == OUTPUT_TRANSFORM_MATRIX_ON;
}
+ inline bool hasDisplayColorMatrix() const {
+ return (mKey & DISPLAY_COLOR_TRANSFORM_MATRIX_MASK) ==
+ DISPLAY_COLOR_TRANSFORM_MATRIX_ON;
+ }
inline bool hasTransformMatrix() const {
return hasInputTransformMatrix() || hasOutputTransformMatrix();
}