[cc] Add nearest neighbor filtering for TextureLayer.

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 78e2a2a3aa9b68e2ddc20a642926becb344034c0..882564926903a25d20874b7f8ca91532ccc2b062 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -2110,8 +2110,9 @@ void GLRenderer::FlushTextureQuadCache() {
   GLC(gl_, gl_->Uniform1i(draw_cache_.sampler_location, 0));
 
   // Assume the current active textures is 0.
-  ResourceProvider::ScopedReadLockGL locked_quad(resource_provider_,
-                                                 draw_cache_.resource_id);
+  ResourceProvider::ScopedSamplerGL locked_quad(resource_provider_,
+                                                draw_cache_.resource_id,
+                                                draw_cache_.nearest_neighbor);

[piman, 2014/10/28 05:09:50]

You need an enum here (GL_LINEAR or GL_NEAREST), not a bool.

[jackhou1, 2014/10/29 00:12:25]

Done.

   DCHECK_EQ(GL_TEXTURE0, GetActiveTextureUnit(gl_));
   GLC(gl_, gl_->BindTexture(GL_TEXTURE_2D, locked_quad.texture_id()));
 
@@ -2119,6 +2120,8 @@ void GLRenderer::FlushTextureQuadCache() {
   COMPILE_ASSERT(sizeof(Float16) == 16 * sizeof(float),
                  struct_is_densely_packed);
 
+  //printf("GLRenderer::FlushTextureQuadCache %d %d\n", draw_cache_.nearest_neighbor, draw_cache_.resource_id);
+
   // Upload the tranforms for both points and uvs.
   GLC(gl_,
       gl_->UniformMatrix4fv(
@@ -2186,15 +2189,19 @@ void GLRenderer::EnqueueTextureQuad(const DrawingFrame* frame,
 
   int resource_id = quad->resource_id;
 
+  //printf("GLRenderer::EnqueueTextureQuad %d %d\n", quad->nearest_neighbor, resource_id);
+
   if (draw_cache_.program_id != binding.program_id ||
       draw_cache_.resource_id != resource_id ||
       draw_cache_.needs_blending != quad->ShouldDrawWithBlending() ||
+      draw_cache_.nearest_neighbor != quad->nearest_neighbor ||
       draw_cache_.background_color != quad->background_color ||
       draw_cache_.matrix_data.size() >= 8) {
     FlushTextureQuadCache();
     draw_cache_.program_id = binding.program_id;
     draw_cache_.resource_id = resource_id;
     draw_cache_.needs_blending = quad->ShouldDrawWithBlending();
+    draw_cache_.nearest_neighbor = quad->nearest_neighbor;
     draw_cache_.background_color = quad->background_color;
 
     draw_cache_.uv_xform_location = binding.tex_transform_location;