Plum through ANGLE_depth_texture

gpu/command_buffer/service/feature_info.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/feature_info.h"
 
 #include <set>
 
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_implementation.h"
 #if defined(OS_MACOSX)
 #include "ui/surface/io_surface_support_mac.h"
 #endif
 
 namespace gpu {
 namespace gles2 {
 
+namespace {
+
+struct FormatInfo {
+   GLenum format;
+   const GLenum* types;
+   size_t count;
+};
+
+}  // anonymous namespace.
+
 FeatureInfo::FeatureInfo() {
+  static const GLenum kAlphaTypes[] = {
+      GL_UNSIGNED_BYTE,
+  };
+  static const GLenum kRGBTypes[] = {
+      GL_UNSIGNED_BYTE,
+      GL_UNSIGNED_SHORT_5_6_5,
+  };
+  static const GLenum kRGBATypes[] = {
+      GL_UNSIGNED_BYTE,
+      GL_UNSIGNED_SHORT_4_4_4_4,
+      GL_UNSIGNED_SHORT_5_5_5_1,
+  };
+  static const GLenum kLuminanceTypes[] = {
+      GL_UNSIGNED_BYTE,
+  };
+  static const GLenum kLuminanceAlphaTypes[] = {
+      GL_UNSIGNED_BYTE,
+  };
+  static const FormatInfo kFormatTypes[] = {
+    { GL_ALPHA, kAlphaTypes, arraysize(kAlphaTypes), },
+    { GL_RGB, kRGBTypes, arraysize(kRGBTypes), },
+    { GL_RGBA, kRGBATypes, arraysize(kRGBATypes), },
+    { GL_LUMINANCE, kLuminanceTypes, arraysize(kLuminanceTypes), },
+    { GL_LUMINANCE_ALPHA, kLuminanceAlphaTypes,
+      arraysize(kLuminanceAlphaTypes), } ,
+  };
+  for (size_t ii = 0; ii < arraysize(kFormatTypes); ++ii) {
+    const FormatInfo& info = kFormatTypes[ii];
+    ValueValidator<GLenum>& validator = texture_format_validators_[info.format];
+    for (size_t jj = 0; jj < info.count; ++jj) {
+      validator.AddValue(info.types[jj]);
+    }
+  }
 }
 
 // Helps query for extensions.
 class ExtensionHelper {
  public:
   ExtensionHelper(const char* extensions, const char* desired_features)
       : desire_all_features_(false) {
     // Check for "*"
     if (desired_features &&
         desired_features[0] == '*' &&
@@ skipping 173 matching lines @@
   // Check if we should enable GL_EXT_texture_filter_anisotropic.
   if (ext.HaveAndDesire("GL_EXT_texture_filter_anisotropic")) {
     AddExtensionString("GL_EXT_texture_filter_anisotropic");
     validators_.texture_parameter.AddValue(
         GL_TEXTURE_MAX_ANISOTROPY_EXT);
     validators_.g_l_state.AddValue(
         GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT);
   }
 
   // Check if we should support GL_OES_packed_depth_stencil and/or
-  // GL_GOOGLE_depth_texture.
-  // NOTE: GL_OES_depth_texture requires support for depth
-  // cubemaps. GL_ARB_depth_texture requires other features that
-  // GL_OES_packed_depth_stencil does not provide. Therefore we made up
-  // GL_GOOGLE_depth_texture.
+  // GL_GOOGLE_depth_texture / GL_CHROMIUM_depth_texture.
+  //
+  // NOTE: GL_OES_depth_texture requires support for depth cubemaps.
+  // GL_ARB_depth_texture requires other features that
+  // GL_OES_packed_depth_stencil does not provide.
+  //
+  // Therefore we made up GL_GOOGLE_depth_texture / GL_CHROMIUM_depth_texture.
+  //
+  // GL_GOOGLE_depth_texture is legacy. As we exposed it into NaCl we can't
+  // get rid of it.
+  //
   bool enable_depth_texture = false;
-  if (ext.Desire("GL_GOOGLE_depth_texture") &&
-      (ext.Have("GL_ARB_depth_texture") ||
-       ext.Have("GL_OES_depth_texture"))) {
-    enable_depth_texture = true;
+  if (ext.Desire("GL_GOOGLE_depth_texture") ||
+      ext.Desire("GL_CHROMIUM_depth_texture")) {
+    if (ext.Have("GL_ARB_depth_texture") ||
+        ext.Have("GL_OES_depth_texture")) {
+      enable_depth_texture = true;
+    }
+
+    if (ext.Have("GL_ANGLE_depth_texture")) {

[apatrick_chromium, 2012/06/07 22:11:36]

This if can be combined with the one above.

[greggman, 2012/06/07 22:53:31]

Done.

+      enable_depth_texture = true;
+    }
+  }
+
+  if (enable_depth_texture) {
+    AddExtensionString("GL_CHROMIUM_depth_texture");
     AddExtensionString("GL_GOOGLE_depth_texture");
+    texture_format_validators_[GL_DEPTH_COMPONENT].AddValue(GL_UNSIGNED_SHORT);
+    texture_format_validators_[GL_DEPTH_COMPONENT].AddValue(GL_UNSIGNED_INT);
     validators_.texture_internal_format.AddValue(GL_DEPTH_COMPONENT);
     validators_.texture_format.AddValue(GL_DEPTH_COMPONENT);
     validators_.pixel_type.AddValue(GL_UNSIGNED_SHORT);
     validators_.pixel_type.AddValue(GL_UNSIGNED_INT);
   }
-  // TODO(gman): Add depth types fo ElementsPerGroup and BytesPerElement
 
   if (ext.Desire("GL_OES_packed_depth_stencil") &&
       (ext.Have("GL_EXT_packed_depth_stencil") ||
        ext.Have("GL_OES_packed_depth_stencil"))) {
     AddExtensionString("GL_OES_packed_depth_stencil");
     if (enable_depth_texture) {
+      texture_format_validators_[GL_DEPTH_STENCIL].AddValue(
+          GL_UNSIGNED_INT_24_8);
       validators_.texture_internal_format.AddValue(GL_DEPTH_STENCIL);
       validators_.texture_format.AddValue(GL_DEPTH_STENCIL);
       validators_.pixel_type.AddValue(GL_UNSIGNED_INT_24_8);
     }
     validators_.render_buffer_format.AddValue(GL_DEPTH24_STENCIL8);
   }
 
   bool enable_texture_format_bgra8888 = false;
   bool enable_read_format_bgra = false;
   // Check if we should allow GL_EXT_texture_format_BGRA8888
@@ skipping 10 matching lines @@
   }
 
   if (ext.Desire("GL_EXT_read_format_bgra") &&
       (ext.Have("GL_EXT_read_format_bgra") ||
        ext.Have("GL_EXT_bgra"))) {
     enable_read_format_bgra = true;
   }
 
   if (enable_texture_format_bgra8888) {
     AddExtensionString("GL_EXT_texture_format_BGRA8888");
+    texture_format_validators_[GL_BGRA_EXT].AddValue(GL_UNSIGNED_BYTE);
     validators_.texture_internal_format.AddValue(GL_BGRA_EXT);
     validators_.texture_format.AddValue(GL_BGRA_EXT);
   }
 
   if (enable_read_format_bgra) {
     AddExtensionString("GL_EXT_read_format_bgra");
     validators_.read_pixel_format.AddValue(GL_BGRA_EXT);
   }
 
   if (ext.Desire("GL_OES_rgb8_rgba8")) {
@@ skipping 43 matching lines @@
       enable_texture_half_float = true;
       if (ext.HaveAndDesire("GL_OES_texture_half_float_linear") ||
           (have_arb_texture_float &&
            ext.Desire("GL_OES_texture_half_float_linear"))) {
         enable_texture_half_float_linear = true;
       }
     }
   }
 
   if (enable_texture_float) {
+    texture_format_validators_[GL_ALPHA].AddValue(GL_FLOAT);
+    texture_format_validators_[GL_RGB].AddValue(GL_FLOAT);
+    texture_format_validators_[GL_RGBA].AddValue(GL_FLOAT);
+    texture_format_validators_[GL_LUMINANCE].AddValue(GL_FLOAT);
+    texture_format_validators_[GL_LUMINANCE_ALPHA].AddValue(GL_FLOAT);
     validators_.pixel_type.AddValue(GL_FLOAT);
+    validators_.read_pixel_type.AddValue(GL_FLOAT);
     AddExtensionString("GL_OES_texture_float");
     if (enable_texture_float_linear) {
       AddExtensionString("GL_OES_texture_float_linear");
     }
   }
 
   if (enable_texture_half_float) {
+    texture_format_validators_[GL_ALPHA].AddValue(GL_HALF_FLOAT_OES);
+    texture_format_validators_[GL_RGB].AddValue(GL_HALF_FLOAT_OES);
+    texture_format_validators_[GL_RGBA].AddValue(GL_HALF_FLOAT_OES);
+    texture_format_validators_[GL_LUMINANCE].AddValue(GL_HALF_FLOAT_OES);
+    texture_format_validators_[GL_LUMINANCE_ALPHA].AddValue(GL_HALF_FLOAT_OES);
     validators_.pixel_type.AddValue(GL_HALF_FLOAT_OES);
+    validators_.read_pixel_type.AddValue(GL_HALF_FLOAT_OES);
     AddExtensionString("GL_OES_texture_half_float");
     if (enable_texture_half_float_linear) {
       AddExtensionString("GL_OES_texture_half_float_linear");
     }
   }
 
   // Check for multisample support
   if (!disallowed_features_.multisampling &&
       ext.Desire("GL_CHROMIUM_framebuffer_multisample") &&
       (ext.Have("GL_EXT_framebuffer_multisample") ||
@@ skipping 157 matching lines @@
   if (extensions_.find(str) == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu