Expand GrTextureProxy to handle highestFilterMode

Once TextureProxies aren't instantiated in the TextureSamplers, the they will need to be able to supply this information.

split out of: https://skia-review.googlesource.com/c/10484/ (Omnibus: Push instantiation of GrTextures later (post TextureSampler))
Change-Id: I66555c0746131f565862f7a30d54ff1d458d2062
Reviewed-on: https://skia-review.googlesource.com/15819
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

3 files changed, 33 insertions, 6 deletions

diff --git a/src/gpu/GrProcessor.cpp b/src/gpu/GrProcessor.cpp
index c5ccc3fbc9..57a8008dae 100644
--- a/src/gpu/GrProcessor.cpp
+++ b/src/gpu/GrProcessor.cpp
@@ -245,8 +245,8 @@ void GrResourceIOProcessor::TextureSampler::reset(GrResourceProvider* resourcePr
     GrTexture* texture = proxy->instantiate(resourceProvider);
     if (texture) {
         fTexture.set(SkRef(texture), kRead_GrIOType);
-        fParams.setFilterMode(SkTMin(params.filterMode(),
-                                     texture->texturePriv().highestFilterMode()));
+        SkASSERT(texture->texturePriv().highestFilterMode() == proxy->highestFilterMode());
+        fParams.setFilterMode(SkTMin(params.filterMode(), proxy->highestFilterMode()));
     }
 
     fVisibility = visibility;
@@ -262,7 +262,8 @@ void GrResourceIOProcessor::TextureSampler::reset(GrResourceProvider* resourcePr
     GrTexture* texture = proxy->instantiate(resourceProvider);
     if (texture) {
         fTexture.set(SkRef(texture), kRead_GrIOType);
-        filterMode = SkTMin(filterMode, texture->texturePriv().highestFilterMode());
+        SkASSERT(texture->texturePriv().highestFilterMode() == proxy->highestFilterMode());
+        filterMode = SkTMin(filterMode, proxy->highestFilterMode());
     }
 
     fParams.reset(tileXAndY, filterMode);
diff --git a/src/gpu/GrTextureProxy.cpp b/src/gpu/GrTextureProxy.cpp
index ce7770d8ec..7557712c12 100644
--- a/src/gpu/GrTextureProxy.cpp
+++ b/src/gpu/GrTextureProxy.cpp
@@ -39,6 +39,23 @@ void GrTextureProxy::setMipColorMode(SkDestinationSurfaceColorMode colorMode) {
     fMipColorMode = colorMode;
 }
 
+// This method parallels the highest_filter_mode functions in GrGLTexture & GrVkTexture.
+GrSamplerParams::FilterMode GrTextureProxy::highestFilterMode() const {
+    if (fTarget) {
+        return fTarget->asTexture()->texturePriv().highestFilterMode();
+    }
+
+    if (GrPixelConfigIsSint(this->config())) {
+        // We only ever want to nearest-neighbor sample signed int textures.
+        return GrSamplerParams::kNone_FilterMode;
+    }
+
+    // In OpenGL, GR_GL_TEXTURE_RECTANGLE and GR_GL_TEXTURE_EXTERNAL (which have a highest filter
+    // mode of bilerp) can only be created via wrapping.
+
+    return GrSamplerParams::kMipMap_FilterMode;
+}
+
 size_t GrTextureProxy::onGpuMemorySize() const {
     if (fTarget) {
         return fTarget->gpuMemorySize();
diff --git a/src/gpu/vk/GrVkTexture.cpp b/src/gpu/vk/GrVkTexture.cpp
index fb6b94fbc9..defbe139c5 100644
--- a/src/gpu/vk/GrVkTexture.cpp
+++ b/src/gpu/vk/GrVkTexture.cpp
@@ -16,6 +16,15 @@
 
 #define VK_CALL(GPU, X) GR_VK_CALL(GPU->vkInterface(), X)
 
+// This method parallels GrTextureProxy::highestFilterMode
+static inline GrSamplerParams::FilterMode highest_filter_mode(GrPixelConfig config) {
+    if (GrPixelConfigIsSint(config)) {
+        // We only ever want to nearest-neighbor sample signed int textures.
+        return GrSamplerParams::kNone_FilterMode;
+    }
+    return GrSamplerParams::kMipMap_FilterMode;
+}
+
 // Because this class is virtually derived from GrSurface we must explicitly call its constructor.
 GrVkTexture::GrVkTexture(GrVkGpu* gpu,
                          SkBudgeted budgeted,
@@ -24,7 +33,7 @@ GrVkTexture::GrVkTexture(GrVkGpu* gpu,
                          const GrVkImageView* view)
     : GrSurface(gpu, desc)
     , GrVkImage(info, GrVkImage::kNot_Wrapped)
-    , INHERITED(gpu, desc, kTexture2DSampler_GrSLType, GrSamplerParams::kMipMap_FilterMode,
+    , INHERITED(gpu, desc, kTexture2DSampler_GrSLType, highest_filter_mode(desc.fConfig),
                 desc.fIsMipMapped)
     , fTextureView(view)
     , fLinearTextureView(nullptr) {
@@ -39,7 +48,7 @@ GrVkTexture::GrVkTexture(GrVkGpu* gpu,
                          GrVkImage::Wrapped wrapped)
     : GrSurface(gpu, desc)
     , GrVkImage(info, wrapped)
-    , INHERITED(gpu, desc, kTexture2DSampler_GrSLType, GrSamplerParams::kMipMap_FilterMode,
+    , INHERITED(gpu, desc, kTexture2DSampler_GrSLType, highest_filter_mode(desc.fConfig),
                 desc.fIsMipMapped)
     , fTextureView(view)
     , fLinearTextureView(nullptr) {
@@ -54,7 +63,7 @@ GrVkTexture::GrVkTexture(GrVkGpu* gpu,
                          GrVkImage::Wrapped wrapped)
     : GrSurface(gpu, desc)
     , GrVkImage(info, wrapped)
-    , INHERITED(gpu, desc, kTexture2DSampler_GrSLType, GrSamplerParams::kMipMap_FilterMode,
+    , INHERITED(gpu, desc, kTexture2DSampler_GrSLType, highest_filter_mode(desc.fConfig),
                 desc.fIsMipMapped)
     , fTextureView(view)
     , fLinearTextureView(nullptr) {