commit ac670c0433d19397d4e36ced2110475b6f54fe26
author Romain Guy <romainguy@google.com> Tue Jul 27 17:39:27 2010 -0700
committer Romain Guy <romainguy@google.com> Tue Jul 27 19:52:29 2010 -0700
tree 10722cd4e465fc053f9536cc312c1125a694108a
parent bb2b2a996b2c0bea7e434136e20340f4f1b398ab

Generate shaders to cover all possible cases.

With this change, all the vertex and fragment shaders used by the GL
renderer are now generated based on a program description supplied
by the caller. This allows the renderer to generate a large number
of shaders without having to write all the possible combinations by
hand. The generated shaders are stored in a program cache.

Change-Id: If54d286e77ae021c724d42090da476df12a18ebb

libs/hwui/Program.cpp

diff --git a/libs/hwui/Program.cpp b/libs/hwui/Program.cpp
index 6e60808..86fc154 100644
--- a/libs/hwui/Program.cpp
+++ b/libs/hwui/Program.cpp
@@ -27,7 +27,6 @@
 
 #define SHADER_SOURCE(name, source) const char* name = #source
 
-#include "shaders/drawColor.vert"
 #include "shaders/drawColor.frag"
 
 #include "shaders/drawTexture.vert"
@@ -127,7 +126,7 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 DrawColorProgram::DrawColorProgram():
-        Program(gDrawColorVertexShader, gDrawColorFragmentShader) {
+        Program(gDrawTextureVertexShader, gDrawColorFragmentShader) {
     getAttribsAndUniforms();
 }
 
@@ -138,6 +137,7 @@
 
 void DrawColorProgram::getAttribsAndUniforms() {
     position = addAttrib("position");
+    texCoords = addAttrib("texCoords");
     color = addUniform("color");
     transform = addUniform("transform");
 }
@@ -154,11 +154,13 @@
 void DrawColorProgram::use() {
     Program::use();
     glEnableVertexAttribArray(position);
+    glEnableVertexAttribArray(texCoords);
 }
 
 void DrawColorProgram::remove() {
     Program::remove();
     glDisableVertexAttribArray(position);
+    glDisableVertexAttribArray(texCoords);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -167,26 +169,21 @@
 
 DrawTextureProgram::DrawTextureProgram():
         DrawColorProgram(gDrawTextureVertexShader, gDrawTextureFragmentShader) {
-    texCoords = addAttrib("texCoords");
     sampler = addUniform("sampler");
 }
 
 DrawTextureProgram::DrawTextureProgram(const char* vertex, const char* fragment):
         DrawColorProgram(vertex, fragment) {
-    texCoords = addAttrib("texCoords");
     sampler = addUniform("sampler");
 }
 
 void DrawTextureProgram::use() {
     DrawColorProgram::use();
-    glActiveTexture(GL_TEXTURE0);
     glUniform1i(sampler, 0);
-    glEnableVertexAttribArray(texCoords);
 }
 
 void DrawTextureProgram::remove() {
     DrawColorProgram::remove();
-    glDisableVertexAttribArray(texCoords);
 }
 
 ///////////////////////////////////////////////////////////////////////////////