Add "sample locations" feature to GrProcessor

tests/GLProgramsTest.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.
  */
 
 // This is a GPU-backend specific test. It relies on static intializers to work
 
@@ skipping 244 matching lines @@
             if (s < numColorProcs) {
                 pipelineBuilder->addColorFragmentProcessor(fp);
             } else {
                 pipelineBuilder->addCoverageFragmentProcessor(fp);
             }
             ++s;
         }
     }
 }
 
-static void set_random_state(GrPipelineBuilder* pipelineBuilder, SkRandom* random) {
-    int state = 0;
-    for (int i = 1; i <= GrPipelineBuilder::kLast_Flag; i <<= 1) {
-        state |= random->nextBool() * i;
-    }
-
+static void set_random_state(GrPipelineBuilder* pipelineBuilder, SkRandom* random,
+                             const GrCaps& caps) {
+    enum { kStateMask = GrPipelineBuilder::kLast_Flag | (GrPipelineBuilder::kLast_Flag - 1) };
+    int state = random->nextU() & kStateMask;
     // If we don't have an MSAA rendertarget then we have to disable useHWAA
     if ((state | GrPipelineBuilder::kHWAntialias_Flag) &&
-        !pipelineBuilder->getRenderTarget()->isUnifiedMultisampled()) {
+        !pipelineBuilder->getRenderTarget()->isStencilBufferMultisampled()) {
         state &= ~GrPipelineBuilder::kHWAntialias_Flag;
     }
+    // We can only use sample locations if they are supported and we have HWAA.
+    if (!caps.sampleLocationsSupport() || !(state & GrPipelineBuilder::kHWAntialias_Flag)) {
+        state &= ~GrPipelineBuilder::kSampleLocations_Flag;
+    }
     pipelineBuilder->enableState(state);
 }
 
 // right now, the only thing we seem to care about in drawState's stencil is 'doesWrite()'
 static void set_random_stencil(GrPipelineBuilder* pipelineBuilder, SkRandom* random) {
     GR_STATIC_CONST_SAME_STENCIL(kDoesWriteStencil,
                                  kReplace_StencilOp,
                                  kReplace_StencilOp,
                                  kAlways_StencilFunc,
                                  0xffff,
@@ skipping 59 matching lines @@
         GrPipelineBuilder pipelineBuilder;
         pipelineBuilder.setRenderTarget(rt.get());
         pipelineBuilder.setClip(clip);
 
         SkAutoTUnref<GrDrawBatch> batch(GrRandomDrawBatch(&random, context));
         SkASSERT(batch);
 
         GrProcessorTestData ptd(&random, context, context->caps(), rt, dummyTextures);
         set_random_color_coverage_stages(&pipelineBuilder, &ptd, maxStages);
         set_random_xpf(&pipelineBuilder, &ptd);
-        set_random_state(&pipelineBuilder, &random);
+        set_random_state(&pipelineBuilder, &random, *context->caps());
         set_random_stencil(&pipelineBuilder, &random);
 
         SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(rt));
         if (!drawContext) {
             SkDebugf("Could not allocate drawContext");
             return false;
         }
 
         drawContext->internal_drawBatch(pipelineBuilder, batch);
     }
@@ skipping 91 matching lines @@
     GrContextOptions opts;
     opts.fSuppressPrints = true;
     GrContextFactory debugFactory(opts);
     skiatest::RunWithGPUTestContexts(test_glprograms_native, skiatest::kNative_GPUTestContexts,
                                      reporter, &debugFactory);
     skiatest::RunWithGPUTestContexts(test_glprograms_other_contexts,
                                      skiatest::kOther_GPUTestContexts, reporter, &debugFactory);
 }
 
 #endif