Add program for linear gradient.
This change adds a new DrawLinearGradientProgram class to enable the drawing
of linear gradients. Two new vertex and fragment shaders are introduced,
based on DrawTextureProgram's shaders.
Change-Id: I885afc076bb6cef8cd3962ae21a086fa6a03bf96
diff --git a/libs/hwui/Program.cpp b/libs/hwui/Program.cpp
index 609b28a..6202ba3 100644
--- a/libs/hwui/Program.cpp
+++ b/libs/hwui/Program.cpp
@@ -33,6 +33,9 @@
#include "shaders/drawTexture.vert"
#include "shaders/drawTexture.frag"
+#include "shaders/drawLinearGradient.vert"
+#include "shaders/drawLinearGradient.frag"
+
///////////////////////////////////////////////////////////////////////////////
// Base program
///////////////////////////////////////////////////////////////////////////////
@@ -178,5 +181,26 @@
glDisableVertexAttribArray(texCoords);
}
+///////////////////////////////////////////////////////////////////////////////
+// Draw linear gradient
+///////////////////////////////////////////////////////////////////////////////
+
+DrawLinearGradientProgram::DrawLinearGradientProgram():
+ DrawColorProgram(gDrawLinearGradientVertexShader, gDrawLinearGradientFragmentShader) {
+ gradient = addUniform("gradient");
+ gradientLength = addUniform("gradientLength");
+ sampler = addUniform("sampler");
+}
+
+void DrawLinearGradientProgram::use() {
+ DrawColorProgram::use();
+ glActiveTexture(GL_TEXTURE0);
+ glUniform1i(sampler, 0);
+}
+
+void DrawLinearGradientProgram::remove() {
+ DrawColorProgram::remove();
+}
+
}; // namespace uirenderer
}; // namespace android