From cfe62e30848eadead4358b0385e57723779b762b Mon Sep 17 00:00:00 2001
From: kkinnunen <kkinnunen@nvidia.com>
Date: Wed, 1 Jul 2015 02:58:50 -0700
Subject: Cleanup legacy NVPR-related definitions

Fixed-function NVPR codepaths were removed a while ago. Only NVPR API
version 1.3 (PathFragmentInputGen) was left working. Remove
backwards-compatibility code that was left behind.

Remove some NVPR API function typedefs that were left from initial
commits.

Remove PathCoords function pointer from GrGLInterface, it has
never been called and causes problems in the future, since it will
not be implemented in the Chromium pseudo extension.

Avoid failing interface creation even if nvprmsaaXX config is
requested but the driver is not recent enough. The SAN bots have
old driver, but try to run nvprmsaa16 configs. Instead, print
out a warning.

Committed: https://skia.googlesource.com/skia/+/fb8d6884e0e01d0c2f8596adf5af1efb0d08de7e

Committed: https://skia.googlesource.com/skia/+/e35b5d99d8dfcc6b2be844df28cba47436380809

Review URL: https://codereview.chromium.org/1177243004
---
 src/gpu/gl/GrGLCaps.cpp | 45 ++++++++++++++++++++++++++++++---------------
 1 file changed, 30 insertions(+), 15 deletions(-)

(limited to 'src/gpu/gl/GrGLCaps.cpp')

diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index feb45eab88..539212c3a5 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -279,21 +279,7 @@ void GrGLCaps::init(const GrContextOptions& contextOptions,
     * GrShaderCaps fields
     **************************************************************************/
 
-    glslCaps->fPathRenderingSupport = ctxInfo.hasExtension("GL_NV_path_rendering");
-
-    if (glslCaps->fPathRenderingSupport) {
-        if (kGL_GrGLStandard == standard) {
-            // We only support v1.3+ of GL_NV_path_rendering which allows us to
-            // set individual fragment inputs with ProgramPathFragmentInputGen. The API
-            // additions are detected by checking the existence of the function.
-            glslCaps->fPathRenderingSupport = ((ctxInfo.version() >= GR_GL_VER(4, 3) ||
-                ctxInfo.hasExtension("GL_ARB_program_interface_query")) &&
-                gli->fFunctions.fProgramPathFragmentInputGen);
-        }
-        else {
-            glslCaps->fPathRenderingSupport = ctxInfo.version() >= GR_GL_VER(3, 1);
-        }
-    }
+    glslCaps->fPathRenderingSupport = this->hasPathRenderingSupport(ctxInfo, gli);
 
     // For now these two are equivalent but we could have dst read in shader via some other method
     glslCaps->fDstReadInShaderSupport = glslCaps->fFBFetchSupport;
@@ -477,6 +463,35 @@ void GrGLCaps::init(const GrContextOptions& contextOptions,
     glslCaps->applyOptionsOverrides(contextOptions);
 }
 
+bool GrGLCaps::hasPathRenderingSupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
+    if (!ctxInfo.hasExtension("GL_NV_path_rendering")) {
+        return false;
+    }
+    if (kGL_GrGLStandard == ctxInfo.standard()) {
+        if (ctxInfo.version() < GR_GL_VER(4, 3) &&
+            !ctxInfo.hasExtension("GL_ARB_program_interface_query")) {
+            return false;
+        }
+    } else {
+        if (ctxInfo.version() < GR_GL_VER(3, 1)) {
+            return false;
+        }
+    }
+    // We only support v1.3+ of GL_NV_path_rendering which allows us to
+    // set individual fragment inputs with ProgramPathFragmentInputGen. The API
+    // additions are detected by checking the existence of the function.
+    // We also use *Then* functions that not all drivers might have. Check
+    // them for consistency.
+    if (NULL == gli->fFunctions.fStencilThenCoverFillPath ||
+        NULL == gli->fFunctions.fStencilThenCoverStrokePath ||
+        NULL == gli->fFunctions.fStencilThenCoverFillPathInstanced ||
+        NULL == gli->fFunctions.fStencilThenCoverStrokePathInstanced ||
+        NULL == gli->fFunctions.fProgramPathFragmentInputGen) {
+        return false;
+    }
+    return true;
+}
+
 void GrGLCaps::initConfigRenderableTable(const GrGLContextInfo& ctxInfo) {
     // OpenGL < 3.0
     //  no support for render targets unless the GL_ARB_framebuffer_object
-- 
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