get genmipmap function in the struct

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 508 matching lines @@
     GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTex->textureID()));
     GrGLTexture::Desc desc;
     desc.fFlags = glTex->desc().fFlags;
     desc.fWidth = glTex->width();
     desc.fHeight = glTex->height();
     desc.fConfig = glTex->config();
     desc.fSampleCnt = glTex->desc().fSampleCnt;
     desc.fTextureID = glTex->textureID();
     desc.fOrigin = glTex->origin();
 
-    return this->uploadTexData(desc, false,
-                               left, top, width, height,
-                               config, buffer, rowBytes);
+    if (this->uploadTexData(desc, false,
+                            left, top, width, height,
+                            config, buffer, rowBytes)) {
+        texture->dirtyMipMaps(true);
+        return true;
+    } else {
+        return false;
+    }
 }
 
 namespace {
 bool adjust_pixel_ops_params(int surfaceWidth,
                              int surfaceHeight,
                              size_t bpp,
                              int* left, int* top, int* width, int* height,
                              const void** data,
                              size_t* rowBytes) {
     if (!*rowBytes) {
@@ skipping 998 matching lines @@
         fHWBoundRenderTarget = rt;
         const GrGLIRect& vp = rt->getViewport();
         if (fHWViewport != vp) {
             vp.pushToGLViewport(this->glInterface());
             fHWViewport = vp;
         }
     }
     if (NULL == bound || !bound->isEmpty()) {
         rt->flagAsNeedingResolve(bound);
     }
+    
+    GrTexture *texture = rt->asTexture();
+    if (texture) {
+        texture->dirtyMipMaps(true);
+    }
 }
 
 GrGLenum gPrimitiveType2GLMode[] = {
     GR_GL_TRIANGLES,
     GR_GL_TRIANGLE_STRIP,
     GR_GL_TRIANGLE_FAN,
     GR_GL_POINTS,
     GR_GL_LINES,
     GR_GL_LINE_STRIP
 };
@@ skipping 439 matching lines @@
         this->setTextureUnit(unitIdx);
         GL_CALL(BindTexture(GR_GL_TEXTURE_2D, texture->textureID()));
         fHWBoundTextures[unitIdx] = texture;
     }
 
     ResetTimestamp timestamp;
     const GrGLTexture::TexParams& oldTexParams = texture->getCachedTexParams(&timestamp);
     bool setAll = timestamp < this->getResetTimestamp();
     GrGLTexture::TexParams newTexParams;
 
-    newTexParams.fFilter = (params.filterMode() == GrTextureParams::kNone_FilterMode) ? GR_GL_NEAREST : GR_GL_LINEAR;
+    static GrGLenum glFilterModes[] = {
+        GR_GL_NEAREST,
+        GR_GL_LINEAR,
+        GR_GL_LINEAR_MIPMAP_LINEAR
+    };
+    newTexParams.fFilter = glFilterModes[params.filterMode()];
+    
+#ifndef SKIA_IGNORE_GPU_MIPMAPS
+    if (params.filterMode() == GrTextureParams::kMipMap_FilterMode && 
+        texture->mipMapsAreDirty()) {
+//        GL_CALL(Hint(GR_GL_GENERATE_MIPMAP_HINT,GR_GL_NICEST));
+        GL_CALL(GenerateMipmap(GR_GL_TEXTURE_2D));
+        texture->dirtyMipMaps(false);
+    }
+#endif
 
     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));
     if (setAll || newTexParams.fFilter != oldTexParams.fFilter) {
         this->setTextureUnit(unitIdx);
         GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                               GR_GL_TEXTURE_MAG_FILTER,
@@ skipping 495 matching lines @@
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }