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/* 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