added constant folding & branch elimination to skslc

src/gpu/gl/GrGLGpu.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLGpu.h"
 
 #include "../private/GrGLSL.h"
@@ skipping 3987 matching lines @@
     GrGLfloat dy1 = 2.f * (dstPoint.fY + h) / dh - 1.f;
     if (kBottomLeft_GrSurfaceOrigin == dst->origin()) {
         dy0 = -dy0;
         dy1 = -dy1;
     }
 
     GrGLfloat sx0 = (GrGLfloat)srcRect.fLeft;
     GrGLfloat sx1 = (GrGLfloat)(srcRect.fLeft + w);
     GrGLfloat sy0 = (GrGLfloat)srcRect.fTop;
     GrGLfloat sy1 = (GrGLfloat)(srcRect.fTop + h);
+    int sw = src->width();
     int sh = src->height();
     if (kBottomLeft_GrSurfaceOrigin == src->origin()) {
         sy0 = sh - sy0;
         sy1 = sh - sy1;
     }
-    // src rect edges in normalized texture space (0 to 1) unless we're using a RECTANGLE texture.
-    GrGLenum srcTarget = srcTex->target();
-    if (GR_GL_TEXTURE_RECTANGLE != srcTarget) {
-        int sw = src->width();
-        sx0 /= sw;
-        sx1 /= sw;
-        sy0 /= sh;
-        sy1 /= sh;
-    }
+    // src rect edges in normalized texture space (0 to 1)
+    sx0 /= sw;
+    sx1 /= sw;
+    sy0 /= sh;
+    sy1 /= sh;
 
     GL_CALL(Uniform4f(fCopyPrograms[progIdx].fPosXformUniform, dx1 - dx0, dy1 - dy0, dx0, dy0));
     GL_CALL(Uniform4f(fCopyPrograms[progIdx].fTexCoordXformUniform,
                       sx1 - sx0, sy1 - sy0, sx0, sy0));
     GL_CALL(Uniform1i(fCopyPrograms[progIdx].fTextureUniform, 0));
 
     GrXferProcessor::BlendInfo blendInfo;
     blendInfo.reset();
     this->flushBlend(blendInfo, GrSwizzle::RGBA());
     this->flushColorWrite(true);
@@ skipping 463 matching lines @@
     GL_CALL(WaitSync(glSem->sync(), 0, GR_GL_TIMEOUT_IGNORED));
 }
 
 void GrGLGpu::deleteSync(GrGLsync sync) const {
     GL_CALL(DeleteSync(sync));
 }
 
 void GrGLGpu::flush() {
     GL_CALL(Flush());
 }