Add support for vertex and geometry shader textures

src/gpu/vk/GrVkCaps.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrVkCaps.h"
 
 #include "GrVkUtil.h"
@@ skipping 21 matching lines @@
     fGeometryBufferMapThreshold = SK_MaxS32;  //TODO: figure this out
 
     fMaxRenderTargetSize = 4096; // minimum required by spec
     fMaxTextureSize = 4096; // minimum required by spec
     fMaxColorSampleCount = 4; // minimum required by spec
     fMaxStencilSampleCount = 4; // minimum required by spec
 
 
     fShaderCaps.reset(new GrGLSLCaps(contextOptions));
 
-    /**************************************************************************
-    * GrVkCaps fields
-    **************************************************************************/
-    fMaxSampledTextures = 16; // Spec requires a minimum of 16 sampled textures per stage
-
     this->init(contextOptions, vkInterface, physDev);
 }
 
 void GrVkCaps::init(const GrContextOptions& contextOptions, const GrVkInterface* vkInterface,
                     VkPhysicalDevice physDev) {
+    VkPhysicalDeviceProperties properties;
+    GR_VK_CALL(vkInterface, GetPhysicalDeviceProperties(physDev, &properties));
 
-    this->initGLSLCaps(vkInterface, physDev);
+    this->initGLSLCaps(vkInterface, physDev, properties);
     this->initConfigTexturableTable(vkInterface, physDev);
     this->initConfigRenderableTable(vkInterface, physDev);
     this->initStencilFormats(vkInterface, physDev);
 
-    VkPhysicalDeviceProperties properties;
-    GR_VK_CALL(vkInterface, GetPhysicalDeviceProperties(physDev, &properties));
-
     // We could actually querey and get a max size for each config, however maxImageDimension2D will
     // give the minimum max size across all configs. So for simplicity we will use that for now.
     fMaxRenderTargetSize = properties.limits.maxImageDimension2D;
     fMaxTextureSize = properties.limits.maxImageDimension2D;
 
     this->initSampleCount(properties);
 
-    fMaxSampledTextures = SkTMin(properties.limits.maxPerStageDescriptorSampledImages,
-                                 properties.limits.maxPerStageDescriptorSamplers);
-
     this->applyOptionsOverrides(contextOptions);
     // need to friend GrVkCaps in GrGLSLCaps.h
     // GrGLSLCaps* glslCaps = static_cast<GrGLSLCaps*>(fShaderCaps.get());
     // glslCaps->applyOptionsOverrides(contextOptions);
 }
 
 int get_max_sample_count(VkSampleCountFlags flags) {
     SkASSERT(flags & VK_SAMPLE_COUNT_1_BIT);
     if (!(flags & VK_SAMPLE_COUNT_2_BIT)) {
         return 0;
@@ skipping 17 matching lines @@
 }
 
 void GrVkCaps::initSampleCount(const VkPhysicalDeviceProperties& properties) {
     VkSampleCountFlags colorSamples = properties.limits.framebufferColorSampleCounts;
     VkSampleCountFlags stencilSamples = properties.limits.framebufferStencilSampleCounts;
 
     fMaxColorSampleCount = get_max_sample_count(colorSamples);
     fMaxStencilSampleCount = get_max_sample_count(stencilSamples);
 }
 
-void GrVkCaps::initGLSLCaps(const GrVkInterface* interface, VkPhysicalDevice physDev) {
+void GrVkCaps::initGLSLCaps(const GrVkInterface* interface, VkPhysicalDevice physDev,
+                            const VkPhysicalDeviceProperties& properties) {
     GrGLSLCaps* glslCaps = static_cast<GrGLSLCaps*>(fShaderCaps.get());
     // TODO: actually figure out a correct version here
     glslCaps->fVersionDeclString = "#version 140\n";
 
     // fConfigOutputSwizzle will default to RGBA so we only need to set it for alpha only config.
     for (int i = 0; i < kGrPixelConfigCnt; ++i) {
         GrPixelConfig config = static_cast<GrPixelConfig>(i);
         if (GrPixelConfigIsAlphaOnly(config)) {
             glslCaps->fConfigTextureSwizzle[i] = GrSwizzle::RRRR();
             glslCaps->fConfigOutputSwizzle[i] = GrSwizzle::AAAA();
         } else {
             glslCaps->fConfigTextureSwizzle[i] = GrSwizzle::RGBA();
         }
     }
 
     glslCaps->fShaderDerivativeSupport = true;
+
+    glslCaps->fMaxVertexSamplers =
+    glslCaps->fMaxGeometrySamplers =
+    glslCaps->fMaxFragmentSamplers = SkTMin(properties.limits.maxPerStageDescriptorSampledImages,
+                                            properties.limits.maxPerStageDescriptorSamplers);
+    glslCaps->fMaxCombinedSamplers = SkTMin(properties.limits.maxDescriptorSetSampledImages,
+                                            properties.limits.maxDescriptorSetSamplers);
+
 }
 
 static void format_supported_for_feature(const GrVkInterface* interface,
                                          VkPhysicalDevice physDev,
                                          VkFormat format,
                                          VkFormatFeatureFlagBits featureBit,
                                          bool* linearSupport,
                                          bool* optimalSupport) {
     VkFormatProperties props;
     memset(&props, 0, sizeof(VkFormatProperties));
@@ skipping 102 matching lines @@
                   // internal Format             stencil bits      total bits        packed?
         gS8    = { VK_FORMAT_S8_UINT,            8,                 8,               false },
         gD24S8 = { VK_FORMAT_D24_UNORM_S8_UINT,  8,                32,               true };
 
     // I'm simply assuming that these two will be supported since they are used in example code.
     // TODO: Actaully figure this out
     SET_CONFIG_CAN_STENCIL(gS8);
     SET_CONFIG_CAN_STENCIL(gD24S8);
 }