Add detection of mip support

src/gpu/gl/GrGpuGL.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 "GrGpuGL.h"
 #include "GrGLStencilBuffer.h"
@@ skipping 2010 matching lines @@
     static GrGLenum glMinFilterModes[] = {
         GR_GL_NEAREST,
         GR_GL_LINEAR,
         GR_GL_LINEAR_MIPMAP_LINEAR
     };
     static GrGLenum glMagFilterModes[] = {
         GR_GL_NEAREST,
         GR_GL_LINEAR,
         GR_GL_LINEAR
     };
-    newTexParams.fMinFilter = glMinFilterModes[params.filterMode()];
-    newTexParams.fMagFilter = glMagFilterModes[params.filterMode()];
+    GrTextureParams::FilterMode filterMode = params.filterMode();
+    if (!this->caps()->mipMapSupport() && GrTextureParams::kMipMap_FilterMode == filterMode) {
+        filterMode = GrTextureParams::kBilerp_FilterMode;
+    }
+    newTexParams.fMinFilter = glMinFilterModes[filterMode];
+    newTexParams.fMagFilter = glMagFilterModes[filterMode];
 
-    if (params.filterMode() == GrTextureParams::kMipMap_FilterMode &&
-        texture->mipMapsAreDirty()) {
+    if (GrTextureParams::kMipMap_FilterMode == filterMode && texture->mipMapsAreDirty()) {
 //        GL_CALL(Hint(GR_GL_GENERATE_MIPMAP_HINT,GR_GL_NICEST));
         GL_CALL(GenerateMipmap(GR_GL_TEXTURE_2D));
         texture->dirtyMipMaps(false);
     }
 
     newTexParams.fWrapS = tile_to_gl_wrap(params.getTileModeX());
     newTexParams.fWrapT = tile_to_gl_wrap(params.getTileModeY());
     memcpy(newTexParams.fSwizzleRGBA,
            GrGLShaderBuilder::GetTexParamSwizzle(texture->config(), this->glCaps()),
            sizeof(newTexParams.fSwizzleRGBA));
@@ skipping 647 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }