/*
 * Copyright 2003 VMware, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include "main/version.h"

#include "brw_context.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"

/**
 * Initializes potential list of extensions if ctx == NULL, or actually enables
 * extensions for a context.
 */
void
intelInitExtensions(struct gl_context *ctx)
{
   struct brw_context *brw = brw_context(ctx);
   const struct gen_device_info *devinfo = &brw->screen->devinfo;

   assert(devinfo->gen >= 4);

   ctx->Extensions.ARB_arrays_of_arrays = true;
   ctx->Extensions.ARB_buffer_storage = true;
   ctx->Extensions.ARB_clear_texture = true;
   ctx->Extensions.ARB_clip_control = true;
   ctx->Extensions.ARB_copy_image = true;
   ctx->Extensions.ARB_depth_buffer_float = true;
   ctx->Extensions.ARB_depth_clamp = true;
   ctx->Extensions.ARB_depth_texture = true;
   ctx->Extensions.ARB_draw_elements_base_vertex = true;
   ctx->Extensions.ARB_draw_instanced = true;
   ctx->Extensions.ARB_ES2_compatibility = true;
   ctx->Extensions.ARB_explicit_attrib_location = true;
   ctx->Extensions.ARB_explicit_uniform_location = true;
   ctx->Extensions.ARB_fragment_coord_conventions = true;
   ctx->Extensions.ARB_fragment_program = true;
   ctx->Extensions.ARB_fragment_program_shadow = true;
   ctx->Extensions.ARB_fragment_shader = true;
   ctx->Extensions.ARB_framebuffer_object = true;
   ctx->Extensions.ARB_half_float_vertex = true;
   ctx->Extensions.ARB_instanced_arrays = true;
   ctx->Extensions.ARB_internalformat_query = true;
   ctx->Extensions.ARB_internalformat_query2 = true;
   ctx->Extensions.ARB_map_buffer_range = true;
   ctx->Extensions.ARB_occlusion_query = true;
   ctx->Extensions.ARB_occlusion_query2 = true;
   ctx->Extensions.ARB_point_sprite = true;
   ctx->Extensions.ARB_polygon_offset_clamp = true;
   ctx->Extensions.ARB_seamless_cube_map = true;
   ctx->Extensions.ARB_shader_bit_encoding = true;
   ctx->Extensions.ARB_shader_draw_parameters = true;
   ctx->Extensions.ARB_shader_group_vote = true;
   ctx->Extensions.ARB_shader_texture_lod = true;
   ctx->Extensions.ARB_shading_language_packing = true;
   ctx->Extensions.ARB_shadow = true;
   ctx->Extensions.ARB_sync = true;
   ctx->Extensions.ARB_texture_border_clamp = true;
   ctx->Extensions.ARB_texture_compression_rgtc = true;
   ctx->Extensions.ARB_texture_cube_map = true;
   ctx->Extensions.ARB_texture_env_combine = true;
   ctx->Extensions.ARB_texture_env_crossbar = true;
   ctx->Extensions.ARB_texture_env_dot3 = true;
   ctx->Extensions.ARB_texture_filter_anisotropic = true;
   ctx->Extensions.ARB_texture_float = true;
   ctx->Extensions.ARB_texture_mirror_clamp_to_edge = true;
   ctx->Extensions.ARB_texture_non_power_of_two = true;
   ctx->Extensions.ARB_texture_rg = true;
   ctx->Extensions.ARB_texture_rgb10_a2ui = true;
   ctx->Extensions.ARB_vertex_program = true;
   ctx->Extensions.ARB_vertex_shader = true;
   ctx->Extensions.ARB_vertex_type_2_10_10_10_rev = true;
   ctx->Extensions.ARB_vertex_type_10f_11f_11f_rev = true;
   ctx->Extensions.EXT_blend_color = true;
   ctx->Extensions.EXT_blend_equation_separate = true;
   ctx->Extensions.EXT_blend_func_separate = true;
   ctx->Extensions.EXT_blend_minmax = true;
   ctx->Extensions.EXT_draw_buffers2 = true;
   ctx->Extensions.EXT_EGL_image_storage = true;
   ctx->Extensions.EXT_float_blend = true;
   ctx->Extensions.EXT_framebuffer_sRGB = true;
   ctx->Extensions.EXT_gpu_program_parameters = true;
   ctx->Extensions.EXT_packed_float = true;
   ctx->Extensions.EXT_pixel_buffer_object = true;
   ctx->Extensions.EXT_point_parameters = true;
   ctx->Extensions.EXT_provoking_vertex = true;
   ctx->Extensions.EXT_render_snorm = true;
   ctx->Extensions.EXT_sRGB = true;
   ctx->Extensions.EXT_stencil_two_side = true;
   ctx->Extensions.EXT_texture_array = true;
   ctx->Extensions.EXT_texture_env_dot3 = true;
   ctx->Extensions.EXT_texture_filter_anisotropic = true;
   ctx->Extensions.EXT_texture_integer = true;
   ctx->Extensions.EXT_texture_norm16 = true;
   ctx->Extensions.EXT_texture_shared_exponent = true;
   ctx->Extensions.EXT_texture_snorm = true;
   ctx->Extensions.EXT_texture_sRGB = true;
   ctx->Extensions.EXT_texture_sRGB_decode = true;
   ctx->Extensions.EXT_texture_sRGB_R8 = true;
   ctx->Extensions.EXT_texture_swizzle = true;
   ctx->Extensions.EXT_texture_type_2_10_10_10_REV = true;
   ctx->Extensions.EXT_vertex_array_bgra = true;
   ctx->Extensions.KHR_robustness = true;
   ctx->Extensions.AMD_seamless_cubemap_per_texture = true;
   ctx->Extensions.APPLE_object_purgeable = true;
   ctx->Extensions.ATI_texture_env_combine3 = true;
   ctx->Extensions.MESA_framebuffer_flip_y = true;
   ctx->Extensions.MESA_pack_invert = true;
   ctx->Extensions.NV_conditional_render = true;
   ctx->Extensions.NV_fog_distance = true;
   ctx->Extensions.NV_primitive_restart = true;
   ctx->Extensions.NV_texture_barrier = true;
   ctx->Extensions.NV_texture_env_combine4 = true;
   ctx->Extensions.NV_texture_rectangle = true;
   ctx->Extensions.TDFX_texture_compression_FXT1 = true;
   ctx->Extensions.OES_compressed_ETC1_RGB8_texture = true;
   ctx->Extensions.OES_draw_texture = true;
   ctx->Extensions.OES_EGL_image = true;
   ctx->Extensions.OES_EGL_image_external = true;
   ctx->Extensions.OES_standard_derivatives = true;
   ctx->Extensions.OES_texture_float = true;
   ctx->Extensions.OES_texture_float_linear = true;
   ctx->Extensions.OES_texture_half_float = true;
   ctx->Extensions.OES_texture_half_float_linear = true;

   if (devinfo->gen >= 8)
      ctx->Const.GLSLVersion = 460;
   else if (devinfo->is_haswell && can_do_pipelined_register_writes(brw->screen))
      ctx->Const.GLSLVersion = 450;
   else if (devinfo->gen >= 7 && can_do_pipelined_register_writes(brw->screen))
      ctx->Const.GLSLVersion = 420;
   else if (devinfo->gen >= 6)
      ctx->Const.GLSLVersion = 330;
   else
      ctx->Const.GLSLVersion = 120;

   if (devinfo->gen >= 6)
      ctx->Const.GLSLVersionCompat = 130;
   else
      ctx->Const.GLSLVersionCompat = 120;

   _mesa_override_glsl_version(&ctx->Const);

   ctx->Extensions.EXT_shader_integer_mix = ctx->Const.GLSLVersion >= 130;
   ctx->Extensions.MESA_shader_integer_functions = ctx->Const.GLSLVersion >= 130;

   if (devinfo->is_g4x || devinfo->gen >= 5) {
      ctx->Extensions.EXT_shader_framebuffer_fetch_non_coherent = true;
      ctx->Extensions.KHR_blend_equation_advanced = true;
   }

   if (devinfo->gen >= 5) {
      ctx->Extensions.ARB_texture_query_levels = ctx->Const.GLSLVersion >= 130;
      ctx->Extensions.ARB_texture_query_lod = true;
      ctx->Extensions.EXT_timer_query = true;
   }

   if (devinfo->gen == 6)
      ctx->Extensions.ARB_transform_feedback2 = true;

   if (devinfo->gen >= 6) {
      ctx->Extensions.ARB_blend_func_extended =
         !driQueryOptionb(&brw->optionCache, "disable_blend_func_extended");
      ctx->Extensions.ARB_conditional_render_inverted = true;
      ctx->Extensions.ARB_cull_distance = true;
      ctx->Extensions.ARB_draw_buffers_blend = true;
      if (ctx->API != API_OPENGL_COMPAT ||
          ctx->Const.AllowHigherCompatVersion)
         ctx->Extensions.ARB_enhanced_layouts = true;
      ctx->Extensions.ARB_ES3_compatibility = true;
      ctx->Extensions.ARB_fragment_layer_viewport = true;
      ctx->Extensions.ARB_pipeline_statistics_query = true;
      ctx->Extensions.ARB_sample_shading = true;
      ctx->Extensions.ARB_shading_language_420pack = true;
      if (ctx->API != API_OPENGL_COMPAT ||
          ctx->Const.AllowHigherCompatVersion) {
         ctx->Extensions.ARB_texture_buffer_object = true;
         ctx->Extensions.ARB_texture_buffer_object_rgb32 = true;
         ctx->Extensions.ARB_texture_buffer_range = true;
      }
      ctx->Extensions.ARB_texture_cube_map_array = true;
      ctx->Extensions.ARB_texture_gather = true;
      ctx->Extensions.ARB_texture_multisample = true;
      ctx->Extensions.ARB_uniform_buffer_object = true;
      ctx->Extensions.EXT_gpu_shader4 = true;
      ctx->Extensions.EXT_texture_shadow_lod = true;

      if (ctx->API != API_OPENGL_COMPAT ||
          ctx->Const.AllowHigherCompatVersion)
         ctx->Extensions.AMD_vertex_shader_layer = true;
      ctx->Extensions.EXT_framebuffer_multisample = true;
      ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = true;
      ctx->Extensions.EXT_transform_feedback = true;
      ctx->Extensions.ARB_transform_feedback_overflow_query = true;
      ctx->Extensions.OES_depth_texture_cube_map = true;
      ctx->Extensions.OES_sample_variables = true;

      ctx->Extensions.ARB_timer_query = brw->screen->hw_has_timestamp;
      ctx->Extensions.EXT_disjoint_timer_query =
         ctx->Extensions.ARB_timer_query;

      /* Only enable this in core profile because other parts of Mesa behave
       * slightly differently when the extension is enabled.
       */
      if (ctx->API == API_OPENGL_CORE) {
         ctx->Extensions.ARB_shader_viewport_layer_array = true;
         ctx->Extensions.ARB_viewport_array = true;
         ctx->Extensions.AMD_vertex_shader_viewport_index = true;
      }
   }

   brw->predicate.supported = false;

   if (devinfo->gen >= 7) {
      ctx->Extensions.ARB_conservative_depth = true;
      ctx->Extensions.ARB_derivative_control = true;
      ctx->Extensions.ARB_framebuffer_no_attachments = true;
      if (ctx->API != API_OPENGL_COMPAT ||
          ctx->Const.AllowHigherCompatVersion) {
         ctx->Extensions.ARB_gpu_shader5 = true;
         ctx->Extensions.ARB_gpu_shader_fp64 = true;
      }
      ctx->Extensions.ARB_shader_atomic_counters = true;
      ctx->Extensions.ARB_shader_atomic_counter_ops = true;
      ctx->Extensions.ARB_shader_clock = true;
      ctx->Extensions.ARB_shader_image_load_store = true;
      ctx->Extensions.ARB_shader_image_size = true;
      ctx->Extensions.ARB_shader_precision = true;
      ctx->Extensions.ARB_shader_texture_image_samples = true;
      if (ctx->API != API_OPENGL_COMPAT ||
          ctx->Const.AllowHigherCompatVersion)
         ctx->Extensions.ARB_tessellation_shader = true;
      ctx->Extensions.ARB_texture_compression_bptc = true;
      ctx->Extensions.ARB_texture_view = true;
      ctx->Extensions.ARB_shader_storage_buffer_object = true;
      ctx->Extensions.ARB_vertex_attrib_64bit = true;
      ctx->Extensions.EXT_shader_samples_identical = true;
      ctx->Extensions.OES_primitive_bounding_box = true;
      ctx->Extensions.OES_texture_buffer = true;

      if (can_do_pipelined_register_writes(brw->screen)) {
         ctx->Extensions.ARB_draw_indirect = true;
         ctx->Extensions.ARB_transform_feedback2 = true;
         ctx->Extensions.ARB_transform_feedback3 = true;
         ctx->Extensions.ARB_transform_feedback_instanced = true;

         if (can_do_compute_dispatch(brw->screen) &&
             ctx->Const.MaxComputeWorkGroupSize[0] >= 1024) {
            ctx->Extensions.ARB_compute_shader = true;
            ctx->Extensions.ARB_ES3_1_compatibility =
               devinfo->gen >= 8 || devinfo->is_haswell;
            ctx->Extensions.NV_compute_shader_derivatives = true;
         }

         if (can_do_predicate_writes(brw->screen)) {
            brw->predicate.supported = true;
            ctx->Extensions.ARB_indirect_parameters = true;
         }
      }

      ctx->Extensions.ARB_gl_spirv = true;
      ctx->Extensions.ARB_spirv_extensions = true;
   }

   if (devinfo->gen >= 8 || devinfo->is_haswell) {
      ctx->Extensions.ARB_stencil_texturing = true;
      ctx->Extensions.ARB_texture_stencil8 = true;
      ctx->Extensions.OES_geometry_shader = true;
      ctx->Extensions.OES_texture_cube_map_array = true;
      ctx->Extensions.OES_viewport_array = true;
   }

   if (devinfo->gen >= 8 || devinfo->is_haswell || devinfo->is_baytrail) {
      ctx->Extensions.ARB_robust_buffer_access_behavior = true;
   }

   if (can_do_mi_math_and_lrr(brw->screen)) {
      ctx->Extensions.ARB_query_buffer_object = true;
   }

   if (devinfo->gen >= 8 || devinfo->is_baytrail) {
      /* For now, we can't enable OES_texture_view on Gen 7 because of
       * some piglit failures coming from
       * piglit/tests/spec/arb_texture_view/rendering-formats.c that need
       * investigation.
       */
      ctx->Extensions.OES_texture_view = true;
   }

   if (devinfo->gen >= 7) {
      /* We can safely enable OES_copy_image on Gen 7, since we emulate
       * the ETC2 support using the shadow_miptree to store the
       * compressed data.
       */
      ctx->Extensions.OES_copy_image = true;
   }

   /* Gen < 6 still uses the blitter. It's somewhat annoying to add support
    * for blackhole there... Does anybody actually care anymore anyway?
    */
   if (devinfo->gen >= 6)
      ctx->Extensions.INTEL_blackhole_render = true;

   if (devinfo->gen >= 8) {
      ctx->Extensions.ARB_gpu_shader_int64 = true;
      /* requires ARB_gpu_shader_int64 */
      ctx->Extensions.ARB_shader_ballot = true;
      ctx->Extensions.ARB_ES3_2_compatibility = true;

      /* Currently only implemented in the scalar backend, so only enable for
       * Gen8+.  Eventually Gen6+ could be supported.
       */
      ctx->Extensions.INTEL_shader_integer_functions2 = true;
   }

   if (devinfo->gen >= 9) {
      ctx->Extensions.ANDROID_extension_pack_es31a = true;
      ctx->Extensions.AMD_depth_clamp_separate = true;
      ctx->Extensions.ARB_post_depth_coverage = true;
      ctx->Extensions.ARB_shader_stencil_export = true;
      ctx->Extensions.EXT_shader_framebuffer_fetch = true;
      ctx->Extensions.INTEL_conservative_rasterization = true;
      ctx->Extensions.INTEL_shader_atomic_float_minmax = true;
      ctx->Extensions.KHR_blend_equation_advanced_coherent = true;
      ctx->Extensions.KHR_texture_compression_astc_ldr = true;
      ctx->Extensions.KHR_texture_compression_astc_sliced_3d = true;

      /*
       * From the Skylake PRM Vol. 7 (Memory Fence Message, page 221):
       *  "A memory fence message issued by a thread causes further messages
       *   issued by the thread to be blocked until all previous data port
       *   messages have completed, or the results can be globally observed from
       *   the point of view of other threads in the system."
       *
       * From the Haswell PRM Vol. 7 (Memory Fence, page 256):
       *  "A memory fence message issued by a thread causes further messages
       *   issued by the thread to be blocked until all previous messages issued
       *   by the thread to that data port (data cache or render cache) have
       *   been globally observed from the point of view of other threads in the
       *   system."
       *
       * Summarized: For ARB_fragment_shader_interlock to work, we need to
       * ensure memory access ordering for all messages to the dataport from
       * all threads. Memory fence messages prior to SKL only provide memory
       * access ordering for messages from the same thread, so we can only
       * support the feature from Gen9 onwards.
       *
       */

      ctx->Extensions.ARB_fragment_shader_interlock = true;
   }

   if (gen_device_info_is_9lp(devinfo))
      ctx->Extensions.KHR_texture_compression_astc_hdr = true;

   if (devinfo->gen >= 6)
      ctx->Extensions.INTEL_performance_query = true;

   if (ctx->API != API_OPENGL_COMPAT ||
       ctx->Const.AllowHigherCompatVersion)
      ctx->Extensions.ARB_base_instance = true;
   if (ctx->API != API_OPENGL_CORE)
      ctx->Extensions.ARB_color_buffer_float = true;

   ctx->Extensions.EXT_texture_compression_s3tc = true;
   ctx->Extensions.EXT_texture_compression_s3tc_srgb = true;
   ctx->Extensions.ANGLE_texture_compression_dxt = true;

   ctx->Extensions.EXT_demote_to_helper_invocation = true;
}