1 files changed, 70 insertions, 0 deletions
diff --git a/gfx/wr/webrender/res/base.glsl b/gfx/wr/webrender/res/base.glsl
new file mode 100644
index 0000000000..e381ff6ca9
--- /dev/null
+++ b/gfx/wr/webrender/res/base.glsl
@@ -0,0 +1,70 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#if defined(GL_ES)
+    #if GL_ES == 1
+        // Sampler default precision is lowp on mobile GPUs.
+        // This causes RGBA32F texture data to be clamped to 16 bit floats on some GPUs (e.g. Mali-T880).
+        // Define highp precision macro to allow lossless FLOAT texture sampling.
+        #define HIGHP_SAMPLER_FLOAT highp
+
+        // Default int precision in GLES 3 is highp (32 bits) in vertex shaders
+        // and mediump (16 bits) in fragment shaders. If an int is being used as
+        // a texel address in a fragment shader it, and therefore requires > 16
+        // bits, it must be qualified with this.
+        #define HIGHP_FS_ADDRESS highp
+
+        // texelFetchOffset is buggy on some Android GPUs (see issue #1694).
+        // Fallback to texelFetch on mobile GPUs.
+        #define TEXEL_FETCH(sampler, position, lod, offset) texelFetch(sampler, position + offset, lod)
+    #else
+        #define HIGHP_SAMPLER_FLOAT
+        #define HIGHP_FS_ADDRESS
+        #define TEXEL_FETCH(sampler, position, lod, offset) texelFetchOffset(sampler, position, lod, offset)
+    #endif
+#else
+    #define HIGHP_SAMPLER_FLOAT
+    #define HIGHP_FS_ADDRESS
+    #if defined(PLATFORM_MACOS) && !defined(SWGL)
+        // texelFetchOffset introduces a variety of shader compilation bugs on macOS Intel so avoid it.
+        #define TEXEL_FETCH(sampler, position, lod, offset) texelFetch(sampler, position + offset, lod)
+    #else
+        #define TEXEL_FETCH(sampler, position, lod, offset) texelFetchOffset(sampler, position, lod, offset)
+    #endif
+#endif
+
+#ifdef SWGL
+    #define SWGL_DRAW_SPAN
+    #define SWGL_CLIP_MASK
+    #define SWGL_ANTIALIAS
+    #define SWGL_BLEND
+    #define SWGL_CLIP_DIST
+#endif
+
+#ifdef WR_VERTEX_SHADER
+    #ifdef SWGL
+        // Annotate a vertex attribute as being flat per each drawn primitive instance.
+        // SWGL can use this information to avoid redundantly loading the attribute in all SIMD lanes.
+        #define PER_INSTANCE flat
+    #else
+        #define PER_INSTANCE
+    #endif
+
+    #if __VERSION__ != 100
+        #define varying out
+        #define attribute in
+    #endif
+#endif
+
+#ifdef WR_FRAGMENT_SHADER
+    precision highp float;
+    #if __VERSION__ != 100
+        #define varying in
+    #endif
+#endif
+
+// Flat interpolation is not supported on ESSL 1
+#if __VERSION__ == 100
+    #define flat
+#endif