1 // 2 // Copyright 2013 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 // Contants.h: Defines some implementation specific and gl constants 8 9 #ifndef LIBANGLE_CONSTANTS_H_ 10 #define LIBANGLE_CONSTANTS_H_ 11 12 #include "common/platform.h" 13 14 #include <stdint.h> 15 16 namespace gl 17 { 18 19 // The binary cache is currently left disable by default, and the application can enable it. 20 const size_t kDefaultMaxProgramCacheMemoryBytes = 0; 21 22 enum 23 { 24 // Implementation upper limits, real maximums depend on the hardware 25 MAX_SAMPLE_MASK_WORDS = 2, 26 27 MAX_VERTEX_ATTRIBS = 16, 28 MAX_VERTEX_ATTRIB_BINDINGS = 16, 29 30 // Implementation upper limits, real maximums depend on the hardware 31 IMPLEMENTATION_MAX_VARYING_VECTORS = 32, 32 IMPLEMENTATION_MAX_DRAW_BUFFERS = 8, 33 IMPLEMENTATION_MAX_FRAMEBUFFER_ATTACHMENTS = 34 IMPLEMENTATION_MAX_DRAW_BUFFERS + 2, // 2 extra for depth and/or stencil buffers 35 36 IMPLEMENTATION_MAX_VERTEX_SHADER_UNIFORM_BUFFERS = 16, 37 IMPLEMENTATION_MAX_FRAGMENT_SHADER_UNIFORM_BUFFERS = 16, 38 IMPLEMENTATION_MAX_COMPUTE_SHADER_UNIFORM_BUFFERS = 16, 39 IMPLEMENTATION_MAX_COMBINED_SHADER_UNIFORM_BUFFERS = 40 IMPLEMENTATION_MAX_VERTEX_SHADER_UNIFORM_BUFFERS + 41 IMPLEMENTATION_MAX_FRAGMENT_SHADER_UNIFORM_BUFFERS, 42 43 // GL_EXT_geometry_shader increases the minimum value of GL_MAX_UNIFORM_BUFFER_BINDINGS to 48. 44 IMPLEMENTATION_MAX_UNIFORM_BUFFER_BINDINGS = 48, 45 46 // Transform feedback limits set to the minimum required by the spec. 47 IMPLEMENTATION_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS = 64, 48 IMPLEMENTATION_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS = 4, 49 IMPLEMENTATION_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS = 4, 50 IMPLEMENTATION_MAX_TRANSFORM_FEEDBACK_BUFFERS = 4, 51 52 // Maximum number of views which are supported by the implementation of ANGLE_multiview. 53 IMPLEMENTATION_ANGLE_MULTIVIEW_MAX_VIEWS = 4, 54 55 // These are the maximums the implementation can support 56 // The actual GL caps are limited by the device caps 57 // and should be queried from the Context 58 IMPLEMENTATION_MAX_2D_TEXTURE_SIZE = 16384, 59 IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE = 16384, 60 IMPLEMENTATION_MAX_3D_TEXTURE_SIZE = 2048, 61 IMPLEMENTATION_MAX_2D_ARRAY_TEXTURE_LAYERS = 2048, 62 63 // 1+log2 of max of MAX_*_TEXTURE_SIZE 64 IMPLEMENTATION_MAX_TEXTURE_LEVELS = 15, 65 66 // Limit active textures so we can use fast bitsets. 67 IMPLEMENTATION_MAX_SHADER_TEXTURES = 32, 68 IMPLEMENTATION_MAX_ACTIVE_TEXTURES = IMPLEMENTATION_MAX_SHADER_TEXTURES * 2, 69 IMPLEMENTATION_MAX_IMAGE_UNITS = IMPLEMENTATION_MAX_ACTIVE_TEXTURES, 70 71 // Maximum number of slots allocated for atomic counter buffers. 72 IMPLEMENTATION_MAX_ATOMIC_COUNTER_BUFFERS = 8, 73 74 // Implementation upper limits, real maximums depend on the hardware. 75 IMPLEMENTATION_MAX_SHADER_STORAGE_BUFFER_BINDINGS = 64 76 }; 77 78 namespace limits 79 { 80 // Some of the minimums required by GL, used to detect if the backend meets the minimum requirement. 81 // Currently, there's no need to separate these values per spec version. 82 constexpr uint32_t kMinimumComputeStorageBuffers = 4; 83 } // namespace limits 84 85 } // namespace gl 86 87 #endif // LIBANGLE_CONSTANTS_H_ 88