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OpenGL GLSL very slow in ATI

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Hi, GLSL is very slow in my card; something like 13 FPS only for render a room with bump mapping and bloom.
I already seen the shader log and I didn't seen the word "software".
But I get this warning in many shaders:

Validation warning! - Sampler value GUItexture has not been set in fragment shader<br/> Validation successful.

Also looks like the number of read calls to a 2D sampler sometimes makes the shader to run even slower(something like 2 FPS).
It's very strange because the same shader can run in NVIDIA cards very good and I can run some heavy games(I already run Doom 3):
This is my glxinfo:

name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: ATI
server glx version string: 1.4
server glx extensions:
GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_OML_swap_method,
GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGIS_multisample,
GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group
client glx vendor string: ATI
client glx version string: 1.4
client glx extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_allocate_memory,
GLX_MESA_swap_control, GLX_MESA_swap_frame_usage, GLX_NV_swap_group,
GLX_OML_swap_method, GLX_SGI_make_current_read, GLX_SGI_swap_control,
GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig,
GLX_SGIX_pbuffer, GLX_SGIX_swap_barrier, GLX_SGIX_swap_group,
GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap,
GLX_EXT_framebuffer_sRGB, GLX_ARB_fbconfig_float, GLX_AMD_gpu_association
GLX version: 1.4
GLX extensions:
GLX_ARB_create_context, GLX_ARB_create_context_profile,
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_swap_control,
GLX_NV_swap_group, GLX_OML_swap_method, GLX_SGI_make_current_read,
GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample,
GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_swap_barrier,
GLX_SGIX_swap_group, GLX_SGIX_visual_select_group,
GLX_EXT_texture_from_pixmap
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Radeon HD 3200 Graphics
OpenGL version string: 3.3.9901 Compatibility Profile Context
OpenGL shading language version string: 3.30
OpenGL extensions:
GL_AMDX_debug_output, GL_AMD_conservative_depth,
GL_AMD_draw_buffers_blend, GL_AMD_name_gen_delete,
GL_AMD_performance_monitor, GL_AMD_shader_stencil_export,
GL_ARB_blend_func_extended, GL_ARB_color_buffer_float, GL_ARB_copy_buffer,
GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, GL_ARB_depth_texture,
GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend,
GL_ARB_draw_elements_base_vertex, GL_ARB_draw_instanced,
GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions,
GL_ARB_fragment_program, GL_ARB_fragment_program_shadow,
GL_ARB_fragment_shader, GL_ARB_framebuffer_object,
GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4, GL_ARB_half_float_pixel,
GL_ARB_half_float_vertex, GL_ARB_imaging, GL_ARB_instanced_arrays,
GL_ARB_map_buffer_range, GL_ARB_multisample, GL_ARB_multitexture,
GL_ARB_occlusion_query, GL_ARB_occlusion_query2,
GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite,
GL_ARB_provoking_vertex, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map,
GL_ARB_shader_bit_encoding, GL_ARB_shader_objects,
GL_ARB_shader_texture_lod, GL_ARB_shading_language_100, GL_ARB_shadow,
GL_ARB_shadow_ambient, GL_ARB_sync, GL_ARB_texture_border_clamp,
GL_ARB_texture_buffer_object, GL_ARB_texture_compression,
GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map,
GL_ARB_texture_env_add, GL_ARB_texture_env_combine,
GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3,
GL_ARB_texture_float, GL_ARB_texture_mirrored_repeat,
GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two,
GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui,
GL_ARB_texture_snorm, GL_ARB_timer_query, GL_ARB_transform_feedback2,
GL_ARB_transform_feedback3, GL_ARB_transpose_matrix,
GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra,
GL_ARB_vertex_array_object, GL_ARB_vertex_buffer_object,
GL_ARB_vertex_program, GL_ARB_vertex_shader,
GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_window_pos, GL_ATI_draw_buffers,
GL_ATI_envmap_bumpmap, GL_ATI_fragment_shader, GL_ATI_meminfo,
GL_ATI_separate_stencil, GL_ATI_texture_compression_3dc,
GL_ATI_texture_env_combine3, GL_ATI_texture_float,
GL_ATI_texture_mirror_once, GL_EXT_abgr, GL_EXT_bgra,
GL_EXT_bindable_uniform, GL_EXT_blend_color,
GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate,
GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array,
GL_EXT_copy_buffer, GL_EXT_copy_texture, GL_EXT_draw_buffers2,
GL_EXT_draw_instanced, GL_EXT_draw_range_elements, GL_EXT_fog_coord,
GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample,
GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB,
GL_EXT_geometry_shader4, GL_EXT_gpu_program_parameters,
GL_EXT_gpu_shader4, GL_EXT_histogram, GL_EXT_multi_draw_arrays,
GL_EXT_packed_depth_stencil, GL_EXT_packed_float, GL_EXT_packed_pixels,
GL_EXT_pixel_buffer_object, GL_EXT_point_parameters,
GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color,
GL_EXT_separate_specular_color, GL_EXT_shadow_funcs, GL_EXT_stencil_wrap,
GL_EXT_subtexture, GL_EXT_texgen_reflection, GL_EXT_texture3D,
GL_EXT_texture_array, GL_EXT_texture_buffer_object,
GL_EXT_texture_buffer_object_rgb32, GL_EXT_texture_compression_latc,
GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc,
GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp,
GL_EXT_texture_env_add, GL_EXT_texture_env_combine,
GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic,
GL_EXT_texture_integer, GL_EXT_texture_lod, GL_EXT_texture_lod_bias,
GL_EXT_texture_mirror_clamp, GL_EXT_texture_object,
GL_EXT_texture_rectangle, GL_EXT_texture_sRGB,
GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm,
GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback,
GL_EXT_vertex_array, GL_EXT_vertex_array_bgra,
GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region, GL_NV_blend_square,
GL_NV_conditional_render, GL_NV_copy_depth_to_color,
GL_NV_explicit_multisample, GL_NV_float_buffer, GL_NV_half_float,
GL_NV_primitive_restart, GL_NV_texgen_reflection, GL_SGIS_generate_mipmap,
GL_SGIS_texture_edge_clamp, GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays,
GL_WIN_swap_hint, WGL_EXT_swap_control

65 GLX Visuals
visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat
----------------------------------------------------------------------
0x23 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x24 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x25 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x26 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x27 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x28 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x29 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x2a 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x2b 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x2c 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x2d 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x2e 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x2f 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x30 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x31 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x32 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x33 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x34 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x35 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x36 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x37 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x38 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x39 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x3a 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x3b 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x3c 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x3d 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x3e 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x43 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x44 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x45 24 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x46 24 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x4b 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x4c 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x4d 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x4e 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x4f 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x50 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x51 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x52 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x53 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x54 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x55 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x56 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x57 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x58 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x59 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x5a 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x5b 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x5c 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x5d 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x5e 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x5f 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x60 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x61 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x62 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x63 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x64 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x65 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x66 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x6b 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x6c 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x6d 24 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x6e 24 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0xa0 32 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 4 1 Ncon

75 GLXFBConfigs:
visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat
----------------------------------------------------------------------
0x23 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x24 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x25 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x26 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x27 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x28 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x29 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x2a 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x2b 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x2c 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x2d 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x2e 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x2f 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x30 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x31 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x32 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x33 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x34 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x35 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x36 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x37 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x38 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x39 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x3a 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x3b 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x3c 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x3d 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x3e 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x43 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x44 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x45 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x46 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x4b 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x4c 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x4d 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x4e 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x4f 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x50 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 None
0x51 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x52 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 0 0 None
0x53 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x54 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x55 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x56 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x57 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x58 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 2 1 None
0x59 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x5a 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 2 1 None
0x5b 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x5c 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x5d 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x5e 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x5f 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x60 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 4 1 None
0x61 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x62 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 4 1 None
0x63 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x64 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x65 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x66 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x6b 0 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x6c 0 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None
0x6d 0 dc 0 32 0 r y . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0x6e 0 dc 0 32 0 r . . 8 8 8 8 0 24 0 16 16 16 16 0 0 None
0xa0 0 tc 0 32 0 r . . 8 8 8 8 0 24 0 0 0 0 0 4 1 Ncon
0xa0 0 tc 0 32 0 r y . 8 8 8 8 0 24 0 0 0 0 0 0 0 Ncon
0xa0 0 tc 0 32 0 r y . 8 8 8 8 0 24 8 0 0 0 0 0 0 Ncon
0xa0 0 tc 0 32 0 r . . 8 8 8 8 0 24 8 0 0 0 0 0 0 Ncon
0xa0 0 tc 0 32 0 r . . 8 8 8 8 0 0 0 0 0 0 0 0 0 Ncon
0xa0 0 tc 0 128 0 y . 32 32 32 32 0 24 0 0 0 0 0 0 0 None
0xa0 0 tc 0 128 0 . . 32 32 32 32 0 24 0 0 0 0 0 0 0 None
0xa0 0 tc 0 64 0 y . 16 16 16 16 0 24 0 0 0 0 0 0 0 None
0xa0 0 tc 0 64 0 . . 16 16 16 16 0 24 0 0 0 0 0 0 0 None
0xa0 0 tc 0 32 0 y . 11 11 10 0 0 24 0 0 0 0 0 0 0 None
0xa0 0 tc 0 32 0 . . 11 11 10 0 0 24 0 0 0 0 0 0 0 None

And my fglrxinfo:


display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Radeon HD 3200 Graphics
OpenGL version string: 3.3.9901 Compatibility Profile Context

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Quote:
Original post by lobishomen
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Radeon HD 3200 Graphics
OpenGL version string: 3.3.9901 Compatibility Profile Context
I own one of these GPUs, and I think that your expectations may be a little unrealistic. Which NVidia GPU(s) did you compare it to?

Keep in mind that the 3200 is an integrated part, and despite being one of the better integrated GPUs of a few years ago, is clearly showing its age. It should do fine with small amounts of geometry and limited/no shaders, but don't expect to play Crysis.

Also, you are running under linux, and the ATI drivers for legacy GPUs under linux were never terribly strong in the first place. I would recommend booting into Windows some time, and seeing if the performance is better.

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Quote:
Original post by msc_nik
this video show crysis running in a 3200 hd,
Sure, I was being a tad facetious.

Of course Crysis can run (the 3200 is DX10 capable, after all), but it doesn't do so very well - that video seems to be running at 640x480, quality reduced to medium, gamebooster to eek out every last drop of performance, and he *still* isn't hitting 30 fps reliably.

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      1. At what point in this pipeline are resources created?
      Say I have a
      class CCommandList { void SetVertexBuffer(...); void SetIndexBuffer(...); void SetVertexShader(...); void SetPixelShader(...); } borrowed from an existing post here. I would need to generate a VAO at some point and call glGenBuffers etc especially if I start with an empty scene. If my context lives on another thread, how do I call these commands if the command list is only supposed to be a collection of state and what command to use. I don't think that the render thread should do this and somehow add a task to the queue or am I wrong?
      Or could I do some variation where I do the loading in a thread with shared context and from there generate a command that has the handle to the resources needed.
       
      2. How do I know all my jobs are done.
      I'm working with C++, is this as simple as knowing how many objects there are in the scene, for every task that gets added increment a counter and when it matches aforementioned count I signal the renderer that the command list is ready? I was thinking a condition_variable or something would suffice to alert the renderthread that work is ready.
       
      3. Does all work come from a singular queue that the thread pool constantly cycles over?
      With the notion of jobs, we are basically sending the same work repeatedly right? Do all jobs need to be added to a single persistent queue to be submitted over and over again?
       
      4. Are resources destroyed with commands?
      Likewise with initializing and assuming #3 is correct, removing an item from the scene would mean removing it from the job queue, no? Would I need to send a onetime command to the renderer to cleanup?
    • By Finalspace
      I am starting to get into linux X11/GLX programming, but from every C example i found - there is this XVisualInfo thing parameter passed to XCreateWindow always.
      Can i control this parameter later on - when the window is already created? What i want it to change my own non GLX window to be a GLX window - without recreating. Is that possible?
       
      On win32 this works just fine to create a rendering context later on, i simply find and setup the pixel format from a pixel format descriptor and create the context and are ready to go.
       
      I am asking, because if that doesent work - i need to change a few things to support both worlds (Create a context from a existing window, create a context for a new window).
    • By DiligentDev
      This article uses material originally posted on Diligent Graphics web site.
      Introduction
      Graphics APIs have come a long way from small set of basic commands allowing limited control of configurable stages of early 3D accelerators to very low-level programming interfaces exposing almost every aspect of the underlying graphics hardware. Next-generation APIs, Direct3D12 by Microsoft and Vulkan by Khronos are relatively new and have only started getting widespread adoption and support from hardware vendors, while Direct3D11 and OpenGL are still considered industry standard. New APIs can provide substantial performance and functional improvements, but may not be supported by older hardware. An application targeting wide range of platforms needs to support Direct3D11 and OpenGL. New APIs will not give any advantage when used with old paradigms. It is totally possible to add Direct3D12 support to an existing renderer by implementing Direct3D11 interface through Direct3D12, but this will give zero benefits. Instead, new approaches and rendering architectures that leverage flexibility provided by the next-generation APIs are expected to be developed.
      There are at least four APIs (Direct3D11, Direct3D12, OpenGL/GLES, Vulkan, plus Apple's Metal for iOS and osX platforms) that a cross-platform 3D application may need to support. Writing separate code paths for all APIs is clearly not an option for any real-world application and the need for a cross-platform graphics abstraction layer is evident. The following is the list of requirements that I believe such layer needs to satisfy:
      Lightweight abstractions: the API should be as close to the underlying native APIs as possible to allow an application leverage all available low-level functionality. In many cases this requirement is difficult to achieve because specific features exposed by different APIs may vary considerably. Low performance overhead: the abstraction layer needs to be efficient from performance point of view. If it introduces considerable amount of overhead, there is no point in using it. Convenience: the API needs to be convenient to use. It needs to assist developers in achieving their goals not limiting their control of the graphics hardware. Multithreading: ability to efficiently parallelize work is in the core of Direct3D12 and Vulkan and one of the main selling points of the new APIs. Support for multithreading in a cross-platform layer is a must. Extensibility: no matter how well the API is designed, it still introduces some level of abstraction. In some cases the most efficient way to implement certain functionality is to directly use native API. The abstraction layer needs to provide seamless interoperability with the underlying native APIs to provide a way for the app to add features that may be missing. Diligent Engine is designed to solve these problems. Its main goal is to take advantages of the next-generation APIs such as Direct3D12 and Vulkan, but at the same time provide support for older platforms via Direct3D11, OpenGL and OpenGLES. Diligent Engine exposes common C++ front-end for all supported platforms and provides interoperability with underlying native APIs. It also supports integration with Unity and is designed to be used as graphics subsystem in a standalone game engine, Unity native plugin or any other 3D application. Full source code is available for download at GitHub and is free to use.
      Overview
      Diligent Engine API takes some features from Direct3D11 and Direct3D12 as well as introduces new concepts to hide certain platform-specific details and make the system easy to use. It contains the following main components:
      Render device (IRenderDevice  interface) is responsible for creating all other objects (textures, buffers, shaders, pipeline states, etc.).
      Device context (IDeviceContext interface) is the main interface for recording rendering commands. Similar to Direct3D11, there are immediate context and deferred contexts (which in Direct3D11 implementation map directly to the corresponding context types). Immediate context combines command queue and command list recording functionality. It records commands and submits the command list for execution when it contains sufficient number of commands. Deferred contexts are designed to only record command lists that can be submitted for execution through the immediate context.
      An alternative way to design the API would be to expose command queue and command lists directly. This approach however does not map well to Direct3D11 and OpenGL. Besides, some functionality (such as dynamic descriptor allocation) can be much more efficiently implemented when it is known that a command list is recorded by a certain deferred context from some thread.
      The approach taken in the engine does not limit scalability as the application is expected to create one deferred context per thread, and internally every deferred context records a command list in lock-free fashion. At the same time this approach maps well to older APIs.
      In current implementation, only one immediate context that uses default graphics command queue is created. To support multiple GPUs or multiple command queue types (compute, copy, etc.), it is natural to have one immediate contexts per queue. Cross-context synchronization utilities will be necessary.
      Swap Chain (ISwapChain interface). Swap chain interface represents a chain of back buffers and is responsible for showing the final rendered image on the screen.
      Render device, device contexts and swap chain are created during the engine initialization.
      Resources (ITexture and IBuffer interfaces). There are two types of resources - textures and buffers. There are many different texture types (2D textures, 3D textures, texture array, cubmepas, etc.) that can all be represented by ITexture interface.
      Resources Views (ITextureView and IBufferView interfaces). While textures and buffers are mere data containers, texture views and buffer views describe how the data should be interpreted. For instance, a 2D texture can be used as a render target for rendering commands or as a shader resource.
      Pipeline State (IPipelineState interface). GPU pipeline contains many configurable stages (depth-stencil, rasterizer and blend states, different shader stage, etc.). Direct3D11 uses coarse-grain objects to set all stage parameters at once (for instance, a rasterizer object encompasses all rasterizer attributes), while OpenGL contains myriad functions to fine-grain control every individual attribute of every stage. Both methods do not map very well to modern graphics hardware that combines all states into one monolithic state under the hood. Direct3D12 directly exposes pipeline state object in the API, and Diligent Engine uses the same approach.
      Shader Resource Binding (IShaderResourceBinding interface). Shaders are programs that run on the GPU. Shaders may access various resources (textures and buffers), and setting correspondence between shader variables and actual resources is called resource binding. Resource binding implementation varies considerably between different API. Diligent Engine introduces a new object called shader resource binding that encompasses all resources needed by all shaders in a certain pipeline state.
      API Basics
      Creating Resources
      Device resources are created by the render device. The two main resource types are buffers, which represent linear memory, and textures, which use memory layouts optimized for fast filtering. Graphics APIs usually have a native object that represents linear buffer. Diligent Engine uses IBuffer interface as an abstraction for a native buffer. To create a buffer, one needs to populate BufferDesc structure and call IRenderDevice::CreateBuffer() method as in the following example:
      BufferDesc BuffDesc; BufferDesc.Name = "Uniform buffer"; BuffDesc.BindFlags = BIND_UNIFORM_BUFFER; BuffDesc.Usage = USAGE_DYNAMIC; BuffDesc.uiSizeInBytes = sizeof(ShaderConstants); BuffDesc.CPUAccessFlags = CPU_ACCESS_WRITE; m_pDevice->CreateBuffer( BuffDesc, BufferData(), &m_pConstantBuffer ); While there is usually just one buffer object, different APIs use very different approaches to represent textures. For instance, in Direct3D11, there are ID3D11Texture1D, ID3D11Texture2D, and ID3D11Texture3D objects. In OpenGL, there is individual object for every texture dimension (1D, 2D, 3D, Cube), which may be a texture array, which may also be multisampled (i.e. GL_TEXTURE_2D_MULTISAMPLE_ARRAY). As a result there are nine different GL texture types that Diligent Engine may create under the hood. In Direct3D12, there is only one resource interface. Diligent Engine hides all these details in ITexture interface. There is only one  IRenderDevice::CreateTexture() method that is capable of creating all texture types. Dimension, format, array size and all other parameters are specified by the members of the TextureDesc structure:
      TextureDesc TexDesc; TexDesc.Name = "My texture 2D"; TexDesc.Type = TEXTURE_TYPE_2D; TexDesc.Width = 1024; TexDesc.Height = 1024; TexDesc.Format = TEX_FORMAT_RGBA8_UNORM; TexDesc.Usage = USAGE_DEFAULT; TexDesc.BindFlags = BIND_SHADER_RESOURCE | BIND_RENDER_TARGET | BIND_UNORDERED_ACCESS; TexDesc.Name = "Sample 2D Texture"; m_pRenderDevice->CreateTexture( TexDesc, TextureData(), &m_pTestTex ); If native API supports multithreaded resource creation, textures and buffers can be created by multiple threads simultaneously.
      Interoperability with native API provides access to the native buffer/texture objects and also allows creating Diligent Engine objects from native handles. It allows applications seamlessly integrate native API-specific code with Diligent Engine.
      Next-generation APIs allow fine level-control over how resources are allocated. Diligent Engine does not currently expose this functionality, but it can be added by implementing IResourceAllocator interface that encapsulates specifics of resource allocation and providing this interface to CreateBuffer() or CreateTexture() methods. If null is provided, default allocator should be used.
      Initializing the Pipeline State
      As it was mentioned earlier, Diligent Engine follows next-gen APIs to configure the graphics/compute pipeline. One big Pipelines State Object (PSO) encompasses all required states (all shader stages, input layout description, depth stencil, rasterizer and blend state descriptions etc.). This approach maps directly to Direct3D12/Vulkan, but is also beneficial for older APIs as it eliminates pipeline misconfiguration errors. With many individual calls tweaking various GPU pipeline settings it is very easy to forget to set one of the states or assume the stage is already properly configured when in fact it is not. Using pipeline state object helps avoid these problems as all stages are configured at once.
      Creating Shaders
      While in earlier APIs shaders were bound separately, in the next-generation APIs as well as in Diligent Engine shaders are part of the pipeline state object. The biggest challenge when authoring shaders is that Direct3D and OpenGL/Vulkan use different shader languages (while Apple uses yet another language in their Metal API). Maintaining two versions of every shader is not an option for real applications and Diligent Engine implements shader source code converter that allows shaders authored in HLSL to be translated to GLSL. To create a shader, one needs to populate ShaderCreationAttribs structure. SourceLanguage member of this structure tells the system which language the shader is authored in:
      SHADER_SOURCE_LANGUAGE_DEFAULT - The shader source language matches the underlying graphics API: HLSL for Direct3D11/Direct3D12 mode, and GLSL for OpenGL and OpenGLES modes. SHADER_SOURCE_LANGUAGE_HLSL - The shader source is in HLSL. For OpenGL and OpenGLES modes, the source code will be converted to GLSL. SHADER_SOURCE_LANGUAGE_GLSL - The shader source is in GLSL. There is currently no GLSL to HLSL converter, so this value should only be used for OpenGL and OpenGLES modes. There are two ways to provide the shader source code. The first way is to use Source member. The second way is to provide a file path in FilePath member. Since the engine is entirely decoupled from the platform and the host file system is platform-dependent, the structure exposes pShaderSourceStreamFactory member that is intended to provide the engine access to the file system. If FilePath is provided, shader source factory must also be provided. If the shader source contains any #include directives, the source stream factory will also be used to load these files. The engine provides default implementation for every supported platform that should be sufficient in most cases. Custom implementation can be provided when needed.
      When sampling a texture in a shader, the texture sampler was traditionally specified as separate object that was bound to the pipeline at run time or set as part of the texture object itself. However, in most cases it is known beforehand what kind of sampler will be used in the shader. Next-generation APIs expose new type of sampler called static sampler that can be initialized directly in the pipeline state. Diligent Engine exposes this functionality: when creating a shader, textures can be assigned static samplers. If static sampler is assigned, it will always be used instead of the one initialized in the texture shader resource view. To initialize static samplers, prepare an array of StaticSamplerDesc structures and initialize StaticSamplers and NumStaticSamplers members. Static samplers are more efficient and it is highly recommended to use them whenever possible. On older APIs, static samplers are emulated via generic sampler objects.
      The following is an example of shader initialization:
      ShaderCreationAttribs Attrs; Attrs.Desc.Name = "MyPixelShader"; Attrs.FilePath = "MyShaderFile.fx"; Attrs.SearchDirectories = "shaders;shaders\\inc;"; Attrs.EntryPoint = "MyPixelShader"; Attrs.Desc.ShaderType = SHADER_TYPE_PIXEL; Attrs.SourceLanguage = SHADER_SOURCE_LANGUAGE_HLSL; BasicShaderSourceStreamFactory BasicSSSFactory(Attrs.SearchDirectories); Attrs.pShaderSourceStreamFactory = &BasicSSSFactory; ShaderVariableDesc ShaderVars[] = {     {"g_StaticTexture", SHADER_VARIABLE_TYPE_STATIC},     {"g_MutableTexture", SHADER_VARIABLE_TYPE_MUTABLE},     {"g_DynamicTexture", SHADER_VARIABLE_TYPE_DYNAMIC} }; Attrs.Desc.VariableDesc = ShaderVars; Attrs.Desc.NumVariables = _countof(ShaderVars); Attrs.Desc.DefaultVariableType = SHADER_VARIABLE_TYPE_STATIC; StaticSamplerDesc StaticSampler; StaticSampler.Desc.MinFilter = FILTER_TYPE_LINEAR; StaticSampler.Desc.MagFilter = FILTER_TYPE_LINEAR; StaticSampler.Desc.MipFilter = FILTER_TYPE_LINEAR; StaticSampler.TextureName = "g_MutableTexture"; Attrs.Desc.NumStaticSamplers = 1; Attrs.Desc.StaticSamplers = &StaticSampler; ShaderMacroHelper Macros; Macros.AddShaderMacro("USE_SHADOWS", 1); Macros.AddShaderMacro("NUM_SHADOW_SAMPLES", 4); Macros.Finalize(); Attrs.Macros = Macros; RefCntAutoPtr<IShader> pShader; m_pDevice->CreateShader( Attrs, &pShader );
      Creating the Pipeline State Object
      After all required shaders are created, the rest of the fields of the PipelineStateDesc structure provide depth-stencil, rasterizer, and blend state descriptions, the number and format of render targets, input layout format, etc. For instance, rasterizer state can be described as follows:
      PipelineStateDesc PSODesc; RasterizerStateDesc &RasterizerDesc = PSODesc.GraphicsPipeline.RasterizerDesc; RasterizerDesc.FillMode = FILL_MODE_SOLID; RasterizerDesc.CullMode = CULL_MODE_NONE; RasterizerDesc.FrontCounterClockwise = True; RasterizerDesc.ScissorEnable = True; RasterizerDesc.AntialiasedLineEnable = False; Depth-stencil and blend states are defined in a similar fashion.
      Another important thing that pipeline state object encompasses is the input layout description that defines how inputs to the vertex shader, which is the very first shader stage, should be read from the memory. Input layout may define several vertex streams that contain values of different formats and sizes:
      // Define input layout InputLayoutDesc &Layout = PSODesc.GraphicsPipeline.InputLayout; LayoutElement TextLayoutElems[] = {     LayoutElement( 0, 0, 3, VT_FLOAT32, False ),     LayoutElement( 1, 0, 4, VT_UINT8, True ),     LayoutElement( 2, 0, 2, VT_FLOAT32, False ), }; Layout.LayoutElements = TextLayoutElems; Layout.NumElements = _countof( TextLayoutElems ); Finally, pipeline state defines primitive topology type. When all required members are initialized, a pipeline state object can be created by IRenderDevice::CreatePipelineState() method:
      // Define shader and primitive topology PSODesc.GraphicsPipeline.PrimitiveTopologyType = PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE; PSODesc.GraphicsPipeline.pVS = pVertexShader; PSODesc.GraphicsPipeline.pPS = pPixelShader; PSODesc.Name = "My pipeline state"; m_pDev->CreatePipelineState(PSODesc, &m_pPSO); When PSO object is bound to the pipeline, the engine invokes all API-specific commands to set all states specified by the object. In case of Direct3D12 this maps directly to setting the D3D12 PSO object. In case of Direct3D11, this involves setting individual state objects (such as rasterizer and blend states), shaders, input layout etc. In case of OpenGL, this requires a number of fine-grain state tweaking calls. Diligent Engine keeps track of currently bound states and only calls functions to update these states that have actually changed.
      Binding Shader Resources
      Direct3D11 and OpenGL utilize fine-grain resource binding models, where an application binds individual buffers and textures to certain shader or program resource binding slots. Direct3D12 uses a very different approach, where resource descriptors are grouped into tables, and an application can bind all resources in the table at once by setting the table in the command list. Resource binding model in Diligent Engine is designed to leverage this new method. It introduces a new object called shader resource binding that encapsulates all resource bindings required for all shaders in a certain pipeline state. It also introduces the classification of shader variables based on the frequency of expected change that helps the engine group them into tables under the hood:
      Static variables (SHADER_VARIABLE_TYPE_STATIC) are variables that are expected to be set only once. They may not be changed once a resource is bound to the variable. Such variables are intended to hold global constants such as camera attributes or global light attributes constant buffers. Mutable variables (SHADER_VARIABLE_TYPE_MUTABLE) define resources that are expected to change on a per-material frequency. Examples may include diffuse textures, normal maps etc. Dynamic variables (SHADER_VARIABLE_TYPE_DYNAMIC) are expected to change frequently and randomly. Shader variable type must be specified during shader creation by populating an array of ShaderVariableDesc structures and initializing ShaderCreationAttribs::Desc::VariableDesc and ShaderCreationAttribs::Desc::NumVariables members (see example of shader creation above).
      Static variables cannot be changed once a resource is bound to the variable. They are bound directly to the shader object. For instance, a shadow map texture is not expected to change after it is created, so it can be bound directly to the shader:
      PixelShader->GetShaderVariable( "g_tex2DShadowMap" )->Set( pShadowMapSRV ); Mutable and dynamic variables are bound via a new Shader Resource Binding object (SRB) that is created by the pipeline state (IPipelineState::CreateShaderResourceBinding()):
      m_pPSO->CreateShaderResourceBinding(&m_pSRB); Note that an SRB is only compatible with the pipeline state it was created from. SRB object inherits all static bindings from shaders in the pipeline, but is not allowed to change them.
      Mutable resources can only be set once for every instance of a shader resource binding. Such resources are intended to define specific material properties. For instance, a diffuse texture for a specific material is not expected to change once the material is defined and can be set right after the SRB object has been created:
      m_pSRB->GetVariable(SHADER_TYPE_PIXEL, "tex2DDiffuse")->Set(pDiffuseTexSRV); In some cases it is necessary to bind a new resource to a variable every time a draw command is invoked. Such variables should be labeled as dynamic, which will allow setting them multiple times through the same SRB object:
      m_pSRB->GetVariable(SHADER_TYPE_VERTEX, "cbRandomAttribs")->Set(pRandomAttrsCB); Under the hood, the engine pre-allocates descriptor tables for static and mutable resources when an SRB objcet is created. Space for dynamic resources is dynamically allocated at run time. Static and mutable resources are thus more efficient and should be used whenever possible.
      As you can see, Diligent Engine does not expose low-level details of how resources are bound to shader variables. One reason for this is that these details are very different for various APIs. The other reason is that using low-level binding methods is extremely error-prone: it is very easy to forget to bind some resource, or bind incorrect resource such as bind a buffer to the variable that is in fact a texture, especially during shader development when everything changes fast. Diligent Engine instead relies on shader reflection system to automatically query the list of all shader variables. Grouping variables based on three types mentioned above allows the engine to create optimized layout and take heavy lifting of matching resources to API-specific resource location, register or descriptor in the table.
      This post gives more details about the resource binding model in Diligent Engine.
      Setting the Pipeline State and Committing Shader Resources
      Before any draw or compute command can be invoked, the pipeline state needs to be bound to the context:
      m_pContext->SetPipelineState(m_pPSO); Under the hood, the engine sets the internal PSO object in the command list or calls all the required native API functions to properly configure all pipeline stages.
      The next step is to bind all required shader resources to the GPU pipeline, which is accomplished by IDeviceContext::CommitShaderResources() method:
      m_pContext->CommitShaderResources(m_pSRB, COMMIT_SHADER_RESOURCES_FLAG_TRANSITION_RESOURCES); The method takes a pointer to the shader resource binding object and makes all resources the object holds available for the shaders. In the case of D3D12, this only requires setting appropriate descriptor tables in the command list. For older APIs, this typically requires setting all resources individually.
      Next-generation APIs require the application to track the state of every resource and explicitly inform the system about all state transitions. For instance, if a texture was used as render target before, while the next draw command is going to use it as shader resource, a transition barrier needs to be executed. Diligent Engine does the heavy lifting of state tracking.  When CommitShaderResources() method is called with COMMIT_SHADER_RESOURCES_FLAG_TRANSITION_RESOURCES flag, the engine commits and transitions resources to correct states at the same time. Note that transitioning resources does introduce some overhead. The engine tracks state of every resource and it will not issue the barrier if the state is already correct. But checking resource state is an overhead that can sometimes be avoided. The engine provides IDeviceContext::TransitionShaderResources() method that only transitions resources:
      m_pContext->TransitionShaderResources(m_pPSO, m_pSRB); In some scenarios it is more efficient to transition resources once and then only commit them.
      Invoking Draw Command
      The final step is to set states that are not part of the PSO, such as render targets, vertex and index buffers. Diligent Engine uses Direct3D11-syle API that is translated to other native API calls under the hood:
      ITextureView *pRTVs[] = {m_pRTV}; m_pContext->SetRenderTargets(_countof( pRTVs ), pRTVs, m_pDSV); // Clear render target and depth buffer const float zero[4] = {0, 0, 0, 0}; m_pContext->ClearRenderTarget(nullptr, zero); m_pContext->ClearDepthStencil(nullptr, CLEAR_DEPTH_FLAG, 1.f); // Set vertex and index buffers IBuffer *buffer[] = {m_pVertexBuffer}; Uint32 offsets[] = {0}; Uint32 strides[] = {sizeof(MyVertex)}; m_pContext->SetVertexBuffers(0, 1, buffer, strides, offsets, SET_VERTEX_BUFFERS_FLAG_RESET); m_pContext->SetIndexBuffer(m_pIndexBuffer, 0); Different native APIs use various set of function to execute draw commands depending on command details (if the command is indexed, instanced or both, what offsets in the source buffers are used etc.). For instance, there are 5 draw commands in Direct3D11 and more than 9 commands in OpenGL with something like glDrawElementsInstancedBaseVertexBaseInstance not uncommon. Diligent Engine hides all details with single IDeviceContext::Draw() method that takes takes DrawAttribs structure as an argument. The structure members define all attributes required to perform the command (primitive topology, number of vertices or indices, if draw call is indexed or not, if draw call is instanced or not, if draw call is indirect or not, etc.). For example:
      DrawAttribs attrs; attrs.IsIndexed = true; attrs.IndexType = VT_UINT16; attrs.NumIndices = 36; attrs.Topology = PRIMITIVE_TOPOLOGY_TRIANGLE_LIST; pContext->Draw(attrs); For compute commands, there is IDeviceContext::DispatchCompute() method that takes DispatchComputeAttribs structure that defines compute grid dimension.
      Source Code
      Full engine source code is available on GitHub and is free to use. The repository contains tutorials, sample applications, asteroids performance benchmark and an example Unity project that uses Diligent Engine in native plugin.
      Atmospheric scattering sample demonstrates how Diligent Engine can be used to implement various rendering tasks: loading textures from files, using complex shaders, rendering to multiple render targets, using compute shaders and unordered access views, etc.

      Asteroids performance benchmark is based on this demo developed by Intel. It renders 50,000 unique textured asteroids and allows comparing performance of Direct3D11 and Direct3D12 implementations. Every asteroid is a combination of one of 1000 unique meshes and one of 10 unique textures.

      Finally, there is an example project that shows how Diligent Engine can be integrated with Unity.

      Future Work
      The engine is under active development. It currently supports Windows desktop, Universal Windows, Linux, Android, MacOS, and iOS platforms. Direct3D11, Direct3D12, OpenGL/GLES backends are now feature complete. Vulkan backend is coming next, and Metal backend is in the plan.
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