Add m-esr52 at 52.6.0

1 files changed, 255 insertions, 0 deletions

diff --git a/gfx/angle/src/compiler/translator/BuiltInFunctionEmulatorGLSL.cpp b/gfx/angle/src/compiler/translator/BuiltInFunctionEmulatorGLSL.cpp
new file mode 100755
index 000000000..74397fb7f
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/BuiltInFunctionEmulatorGLSL.cpp
@@ -0,0 +1,255 @@
+//
+// Copyright (c) 2002-2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "angle_gl.h"
+#include "compiler/translator/BuiltInFunctionEmulator.h"
+#include "compiler/translator/BuiltInFunctionEmulatorGLSL.h"
+#include "compiler/translator/Cache.h"
+#include "compiler/translator/SymbolTable.h"
+#include "compiler/translator/VersionGLSL.h"
+
+namespace sh
+{
+
+void InitBuiltInAbsFunctionEmulatorForGLSLWorkarounds(BuiltInFunctionEmulator *emu,
+                                                      sh::GLenum shaderType)
+{
+    if (shaderType == GL_VERTEX_SHADER)
+    {
+        const TType *int1 = TCache::getType(EbtInt);
+        emu->addEmulatedFunction(EOpAbs, int1, "int webgl_abs_emu(int x) { return x * sign(x); }");
+    }
+}
+
+void InitBuiltInIsnanFunctionEmulatorForGLSLWorkarounds(BuiltInFunctionEmulator *emu,
+                                                        int targetGLSLVersion)
+{
+    // isnan() is supported since GLSL 1.3.
+    if (targetGLSLVersion < GLSL_VERSION_130)
+        return;
+
+    const TType *float1 = TCache::getType(EbtFloat);
+    const TType *float2 = TCache::getType(EbtFloat, 2);
+    const TType *float3 = TCache::getType(EbtFloat, 3);
+    const TType *float4 = TCache::getType(EbtFloat, 4);
+
+    // !(x > 0.0 || x < 0.0 || x == 0.0) will be optimized and always equal to false.
+    emu->addEmulatedFunction(
+        EOpIsNan, float1,
+        "bool webgl_isnan_emu(float x) { return (x > 0.0 || x < 0.0) ? false : x != 0.0; }");
+    emu->addEmulatedFunction(
+        EOpIsNan, float2,
+        "bvec2 webgl_isnan_emu(vec2 x)\n"
+        "{\n"
+        "    bvec2 isnan;\n"
+        "    for (int i = 0; i < 2; i++)\n"
+        "    {\n"
+        "        isnan[i] = (x[i] > 0.0 || x[i] < 0.0) ? false : x[i] != 0.0;\n"
+        "    }\n"
+        "    return isnan;\n"
+        "}\n");
+    emu->addEmulatedFunction(
+        EOpIsNan, float3,
+        "bvec3 webgl_isnan_emu(vec3 x)\n"
+        "{\n"
+        "    bvec3 isnan;\n"
+        "    for (int i = 0; i < 3; i++)\n"
+        "    {\n"
+        "        isnan[i] = (x[i] > 0.0 || x[i] < 0.0) ? false : x[i] != 0.0;\n"
+        "    }\n"
+        "    return isnan;\n"
+        "}\n");
+    emu->addEmulatedFunction(
+        EOpIsNan, float4,
+        "bvec4 webgl_isnan_emu(vec4 x)\n"
+        "{\n"
+        "    bvec4 isnan;\n"
+        "    for (int i = 0; i < 4; i++)\n"
+        "    {\n"
+        "        isnan[i] = (x[i] > 0.0 || x[i] < 0.0) ? false : x[i] != 0.0;\n"
+        "    }\n"
+        "    return isnan;\n"
+        "}\n");
+}
+
+// Emulate built-in functions missing from GLSL 1.30 and higher
+void InitBuiltInFunctionEmulatorForGLSLMissingFunctions(BuiltInFunctionEmulator *emu, sh::GLenum shaderType,
+                                                        int targetGLSLVersion)
+{
+    // Emulate packUnorm2x16 and unpackUnorm2x16 (GLSL 4.10)
+    if (targetGLSLVersion < GLSL_VERSION_410)
+    {
+        const TType *float2 = TCache::getType(EbtFloat, 2);
+        const TType *uint1  = TCache::getType(EbtUInt);
+
+        // clang-format off
+        emu->addEmulatedFunction(EOpPackUnorm2x16, float2,
+            "uint webgl_packUnorm2x16_emu(vec2 v)\n"
+            "{\n"
+            "    int x = int(round(clamp(v.x, 0.0, 1.0) * 65535.0));\n"
+            "    int y = int(round(clamp(v.y, 0.0, 1.0) * 65535.0));\n"
+            "    return uint((y << 16) | (x & 0xFFFF));\n"
+            "}\n");
+
+        emu->addEmulatedFunction(EOpUnpackUnorm2x16, uint1,
+            "vec2 webgl_unpackUnorm2x16_emu(uint u)\n"
+            "{\n"
+            "    float x = float(u & 0xFFFFu) / 65535.0;\n"
+            "    float y = float(u >> 16) / 65535.0;\n"
+            "    return vec2(x, y);\n"
+            "}\n");
+        // clang-format on
+    }
+
+    // Emulate packSnorm2x16, packHalf2x16, unpackSnorm2x16, and unpackHalf2x16 (GLSL 4.20)
+    // by using floatBitsToInt, floatBitsToUint, intBitsToFloat, and uintBitsToFloat (GLSL 3.30).
+    if (targetGLSLVersion >= GLSL_VERSION_330 && targetGLSLVersion < GLSL_VERSION_420)
+    {
+        const TType *float2 = TCache::getType(EbtFloat, 2);
+        const TType *uint1 = TCache::getType(EbtUInt);
+
+        // clang-format off
+        emu->addEmulatedFunction(EOpPackSnorm2x16, float2,
+            "uint webgl_packSnorm2x16_emu(vec2 v)\n"
+            "{\n"
+            "    #if defined(GL_ARB_shading_language_packing)\n"
+            "        return packSnorm2x16(v);\n"
+            "    #else\n"
+            "        int x = int(round(clamp(v.x, -1.0, 1.0) * 32767.0));\n"
+            "        int y = int(round(clamp(v.y, -1.0, 1.0) * 32767.0));\n"
+            "        return uint((y << 16) | (x & 0xFFFF));\n"
+            "    #endif\n"
+            "}\n");
+        emu->addEmulatedFunction(EOpUnpackSnorm2x16, uint1,
+            "#if !defined(GL_ARB_shading_language_packing)\n"
+            "    float webgl_fromSnorm(uint x)\n"
+            "    {\n"
+            "        int xi = (int(x) & 0x7FFF) - (int(x) & 0x8000);\n"
+            "        return clamp(float(xi) / 32767.0, -1.0, 1.0);\n"
+            "    }\n"
+            "#endif\n"
+            "\n"
+            "vec2 webgl_unpackSnorm2x16_emu(uint u)\n"
+            "{\n"
+            "    #if defined(GL_ARB_shading_language_packing)\n"
+            "        return unpackSnorm2x16(u);\n"
+            "    #else\n"
+            "        uint y = (u >> 16);\n"
+            "        uint x = u;\n"
+            "        return vec2(webgl_fromSnorm(x), webgl_fromSnorm(y));\n"
+            "    #endif\n"
+            "}\n");
+        // Functions uint webgl_f32tof16(float val) and float webgl_f16tof32(uint val) are
+        // based on the OpenGL redbook Appendix Session "Floating-Point Formats Used in OpenGL".
+        emu->addEmulatedFunction(EOpPackHalf2x16, float2,
+            "#if !defined(GL_ARB_shading_language_packing)\n"
+            "    uint webgl_f32tof16(float val)\n"
+            "    {\n"
+            "        uint f32 = floatBitsToUint(val);\n"
+            "        uint f16 = 0u;\n"
+            "        uint sign = (f32 >> 16) & 0x8000u;\n"
+            "        int exponent = int((f32 >> 23) & 0xFFu) - 127;\n"
+            "        uint mantissa = f32 & 0x007FFFFFu;\n"
+            "        if (exponent == 128)\n"
+            "        {\n"
+            "            // Infinity or NaN\n"
+            "            // NaN bits that are masked out by 0x3FF get discarded.\n"
+            "            // This can turn some NaNs to infinity, but this is allowed by the spec.\n"
+            "            f16 = sign | (0x1Fu << 10);\n"
+            "            f16 |= (mantissa & 0x3FFu);\n"
+            "        }\n"
+            "        else if (exponent > 15)\n"
+            "        {\n"
+            "            // Overflow - flush to Infinity\n"
+            "            f16 = sign | (0x1Fu << 10);\n"
+            "        }\n"
+            "        else if (exponent > -15)\n"
+            "        {\n"
+            "            // Representable value\n"
+            "            exponent += 15;\n"
+            "            mantissa >>= 13;\n"
+            "            f16 = sign | uint(exponent << 10) | mantissa;\n"
+            "        }\n"
+            "        else\n"
+            "        {\n"
+            "            f16 = sign;\n"
+            "        }\n"
+            "        return f16;\n"
+            "    }\n"
+            "#endif\n"
+            "\n"
+            "uint webgl_packHalf2x16_emu(vec2 v)\n"
+            "{\n"
+            "    #if defined(GL_ARB_shading_language_packing)\n"
+            "        return packHalf2x16(v);\n"
+            "    #else\n"
+            "        uint x = webgl_f32tof16(v.x);\n"
+            "        uint y = webgl_f32tof16(v.y);\n"
+            "        return (y << 16) | x;\n"
+            "    #endif\n"
+            "}\n");
+        emu->addEmulatedFunction(EOpUnpackHalf2x16, uint1,
+            "#if !defined(GL_ARB_shading_language_packing)\n"
+            "    float webgl_f16tof32(uint val)\n"
+            "    {\n"
+            "        uint sign = (val & 0x8000u) << 16;\n"
+            "        int exponent = int((val & 0x7C00u) >> 10);\n"
+            "        uint mantissa = val & 0x03FFu;\n"
+            "        float f32 = 0.0;\n"
+            "        if(exponent == 0)\n"
+            "        {\n"
+            "            if (mantissa != 0u)\n"
+            "            {\n"
+            "                const float scale = 1.0 / (1 << 24);\n"
+            "                f32 = scale * mantissa;\n"
+            "            }\n"
+            "        }\n"
+            "        else if (exponent == 31)\n"
+            "        {\n"
+            "            return uintBitsToFloat(sign | 0x7F800000u | mantissa);\n"
+            "        }\n"
+            "        else\n"
+            "        {\n"
+            "            exponent -= 15;\n"
+            "            float scale;\n"
+            "            if(exponent < 0)\n"
+            "            {\n"
+            "                // The negative unary operator is buggy on OSX.\n"
+            "                // Work around this by using abs instead.\n"
+            "                scale = 1.0 / (1 << abs(exponent));\n"
+            "            }\n"
+            "            else\n"
+            "            {\n"
+            "                scale = 1 << exponent;\n"
+            "            }\n"
+            "            float decimal = 1.0 + float(mantissa) / float(1 << 10);\n"
+            "            f32 = scale * decimal;\n"
+            "        }\n"
+            "\n"
+            "        if (sign != 0u)\n"
+            "        {\n"
+            "            f32 = -f32;\n"
+            "        }\n"
+            "\n"
+            "        return f32;\n"
+            "    }\n"
+            "#endif\n"
+            "\n"
+            "vec2 webgl_unpackHalf2x16_emu(uint u)\n"
+            "{\n"
+            "    #if defined(GL_ARB_shading_language_packing)\n"
+            "        return unpackHalf2x16(u);\n"
+            "    #else\n"
+            "        uint y = (u >> 16);\n"
+            "        uint x = u & 0xFFFFu;\n"
+            "        return vec2(webgl_f16tof32(x), webgl_f16tof32(y));\n"
+            "    #endif\n"
+            "}\n");
+        // clang-format on
+    }
+}
+
+}  // namespace sh