Add support for EXT_blend_minmax

This is to add additional modes (MIN, MAX) to "BlendEquation".
- add cases for "GL_MIN" and "GL_MAX" into "PackGLBlendOp()" in
vk_cache_utils.cpp
- add enabling "blendMinMax" codes into vk_caps_utils.cpp

And, AUTHORS and CONTRIBUTORS are updated.

BUG=angleproject:2897
Tests: dEQP-GLES3.functional.fragment_ops.blend.*min*
       dEQP-GLES3.functional.fragment_ops.blend.*max*

Change-Id: I13a1d6d28a104b18e21697f9f23d77e4eda2d1a6
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1621582
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

AUTHORS

@@ -30,6 +30,7 @@ Advanced Micro Devices, Inc.
 LG Electronics, Inc.
 IBM Inc.
 AdaptVis GmbH
+Samsung Electronics, Inc.
 
 Jacek Caban
 Mark Callow

CONTRIBUTORS

@@ -146,3 +146,6 @@ IBM Inc.
 
 AdaptVis GmbH
  Sascha Kolodzey
+
+Samsung Electronics, Inc.
+ Minkyu Jeong

src/libANGLE/renderer/vulkan/vk_cache_utils.cpp

@@ -39,6 +39,10 @@ uint8_t PackGLBlendOp(GLenum blendOp)
             return static_cast<uint8_t>(VK_BLEND_OP_SUBTRACT);
         case GL_FUNC_REVERSE_SUBTRACT:
             return static_cast<uint8_t>(VK_BLEND_OP_REVERSE_SUBTRACT);
+        case GL_MIN:
+            return static_cast<uint8_t>(VK_BLEND_OP_MIN);
+        case GL_MAX:
+            return static_cast<uint8_t>(VK_BLEND_OP_MAX);
         default:
             UNREACHABLE();
             return 0;

src/libANGLE/renderer/vulkan/vk_caps_utils.cpp

@@ -53,6 +53,9 @@ void RendererVk::ensureCapsInitialized() const
     mNativeExtensions.textureBorderClamp     = false;  // not implemented yet
     mNativeExtensions.translatedShaderSource = true;
 
+    // Enable EXT_blend_minmax
+    mNativeExtensions.blendMinMax = true;
+
     mNativeExtensions.eglImage         = true;
     mNativeExtensions.eglImageExternal = true;
     // TODO(geofflang): Support GL_OES_EGL_image_external_essl3. http://anglebug.com/2668

src/tests/deqp_support/deqp_gles3_test_expectations.txt

@@ -587,28 +587,6 @@
 2905 VULKAN : dEQP-GLES3.functional.state_query.fbo.framebuffer_attachment_component_type = SKIP
 2905 VULKAN : dEQP-GLES3.functional.state_query.fbo.framebuffer_attachment_x_size_texture = SKIP
 
-// Min/Max blending:
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.equation_src_func_dst_func.min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.equation_src_func_dst_func.max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.add_min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.add_max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.subtract_min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.subtract_max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.reverse_subtract_min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.reverse_subtract_max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.min* = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.default_framebuffer.rgb_equation_alpha_equation.max* = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.equation_src_func_dst_func.min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.equation_src_func_dst_func.max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.add_min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.add_max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.subtract_min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.subtract_max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.reverse_subtract_min = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.reverse_subtract_max = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.min* = SKIP
-2897 VULKAN : dEQP-GLES3.functional.fragment_ops.blend.fbo_srgb.rgb_equation_alpha_equation.max* = SKIP
-
 // Blit:
 3200 VULKAN : dEQP-GLES3.functional.fbo.blit.* = SKIP
 3200 VULKAN : dEQP-GLES3.functional.fragment_ops.scissor.framebuffer_blit_center = FAIL