base.glsl (2551B)
1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 #if defined(GL_ES) 6 #if GL_ES == 1 7 // Sampler default precision is lowp on mobile GPUs. 8 // This causes RGBA32F texture data to be clamped to 16 bit floats on some GPUs (e.g. Mali-T880). 9 // Define highp precision macro to allow lossless FLOAT texture sampling. 10 #define HIGHP_SAMPLER_FLOAT highp 11 12 // Default int precision in GLES 3 is highp (32 bits) in vertex shaders 13 // and mediump (16 bits) in fragment shaders. If an int is being used as 14 // a texel address in a fragment shader it, and therefore requires > 16 15 // bits, it must be qualified with this. 16 #define HIGHP_FS_ADDRESS highp 17 18 // texelFetchOffset is buggy on some Android GPUs (see issue #1694). 19 // Fallback to texelFetch on mobile GPUs. 20 #define TEXEL_FETCH(sampler, position, lod, offset) texelFetch(sampler, position + offset, lod) 21 #else 22 #define HIGHP_SAMPLER_FLOAT 23 #define HIGHP_FS_ADDRESS 24 #define TEXEL_FETCH(sampler, position, lod, offset) texelFetchOffset(sampler, position, lod, offset) 25 #endif 26 #else 27 #define HIGHP_SAMPLER_FLOAT 28 #define HIGHP_FS_ADDRESS 29 #if defined(PLATFORM_MACOS) && !defined(SWGL) 30 // texelFetchOffset introduces a variety of shader compilation bugs on macOS Intel so avoid it. 31 #define TEXEL_FETCH(sampler, position, lod, offset) texelFetch(sampler, position + offset, lod) 32 #else 33 #define TEXEL_FETCH(sampler, position, lod, offset) texelFetchOffset(sampler, position, lod, offset) 34 #endif 35 #endif 36 37 #ifdef SWGL 38 #define SWGL_DRAW_SPAN 39 #define SWGL_CLIP_MASK 40 #define SWGL_ANTIALIAS 41 #define SWGL_BLEND 42 #define SWGL_CLIP_DIST 43 #endif 44 45 #ifdef WR_VERTEX_SHADER 46 #ifdef SWGL 47 // Annotate a vertex attribute as being flat per each drawn primitive instance. 48 // SWGL can use this information to avoid redundantly loading the attribute in all SIMD lanes. 49 #define PER_INSTANCE flat 50 #else 51 #define PER_INSTANCE 52 #endif 53 54 #if __VERSION__ != 100 55 #define varying out 56 #define attribute in 57 #endif 58 #endif 59 60 #ifdef WR_FRAGMENT_SHADER 61 precision highp float; 62 #if __VERSION__ != 100 63 #define varying in 64 #endif 65 #endif 66 67 // Flat interpolation is not supported on ESSL 1 68 #if __VERSION__ == 100 69 #define flat 70 #endif