/************************************************************************** * * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. * 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, sub license, 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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. * **************************************************************************/ /** * @file * * Abstract graphics pipe state objects. * * Basic notes: * 1. Want compact representations, so we use bitfields. * 2. Put bitfields before other (GLfloat) fields. */ #ifndef PIPE_STATE_H #define PIPE_STATE_H #include "p_compiler.h" #include "p_defines.h" #include "p_format.h" #ifdef __cplusplus extern "C" { #endif /** * Implementation limits */ #define PIPE_MAX_ATTRIBS 32 #define PIPE_MAX_CLIP_PLANES 8 #define PIPE_MAX_COLOR_BUFS 8 #define PIPE_MAX_CONSTANT_BUFFERS 32 #define PIPE_MAX_SAMPLERS 16 #define PIPE_MAX_VERTEX_SAMPLERS 16 #define PIPE_MAX_GEOMETRY_SAMPLERS 16 #define PIPE_MAX_SHADER_INPUTS 32 #define PIPE_MAX_SHADER_OUTPUTS 32 #define PIPE_MAX_SHADER_RESOURCES 32 #define PIPE_MAX_TEXTURE_LEVELS 16 #define PIPE_MAX_SO_BUFFERS 4 struct pipe_reference { int32_t count; /* atomic */ }; /** * Primitive (point/line/tri) rasterization info */ struct pipe_rasterizer_state { unsigned flatshade:1; unsigned light_twoside:1; unsigned clamp_vertex_color:1; unsigned clamp_fragment_color:1; unsigned front_ccw:1; unsigned cull_face:2; /**< PIPE_FACE_x */ unsigned fill_front:2; /**< PIPE_POLYGON_MODE_x */ unsigned fill_back:2; /**< PIPE_POLYGON_MODE_x */ unsigned offset_point:1; unsigned offset_line:1; unsigned offset_tri:1; unsigned scissor:1; unsigned poly_smooth:1; unsigned poly_stipple_enable:1; unsigned point_smooth:1; unsigned sprite_coord_mode:1; /**< PIPE_SPRITE_COORD_ */ unsigned point_quad_rasterization:1; /** points rasterized as quads or points */ unsigned point_size_per_vertex:1; /**< size computed in vertex shader */ unsigned multisample:1; /* XXX maybe more ms state in future */ unsigned line_smooth:1; unsigned line_stipple_enable:1; unsigned line_last_pixel:1; /** * Use the first vertex of a primitive as the provoking vertex for * flat shading. */ unsigned flatshade_first:1; /** * When true, triangle rasterization uses (0.5, 0.5) pixel centers * for determining pixel ownership. * * When false, triangle rasterization uses (0,0) pixel centers for * determining pixel ownership. * * Triangle rasterization always uses a 'top,left' rule for pixel * ownership, this just alters which point we consider the pixel * center for that test. */ unsigned gl_rasterization_rules:1; /** * When true, rasterization is disabled and no pixels are written. * This only makes sense with the Stream Out functionality. */ unsigned rasterizer_discard:1; /** * When false, depth clipping is disabled and the depth value will be * clamped later at the per-pixel level before depth testing. * This depends on PIPE_CAP_DEPTH_CLIP_DISABLE. */ unsigned depth_clip:1; /** * Enable bits for clipping half-spaces. * This applies to both user clip planes and shader clip distances. * Note that if the bound shader exports any clip distances, these * replace all user clip planes, and clip half-spaces enabled here * but not written by the shader count as disabled. */ unsigned clip_plane_enable:PIPE_MAX_CLIP_PLANES; unsigned line_stipple_factor:8; /**< [1..256] actually */ unsigned line_stipple_pattern:16; unsigned sprite_coord_enable:PIPE_MAX_SHADER_OUTPUTS; float line_width; float point_size; /**< used when no per-vertex size */ float offset_units; float offset_scale; float offset_clamp; }; struct pipe_poly_stipple { unsigned stipple[32]; }; struct pipe_viewport_state { float scale[4]; float translate[4]; }; struct pipe_scissor_state { unsigned minx:16; unsigned miny:16; unsigned maxx:16; unsigned maxy:16; }; struct pipe_clip_state { float ucp[PIPE_MAX_CLIP_PLANES][4]; }; /** * Stream output for vertex transform feedback. */ struct pipe_stream_output_info { unsigned num_outputs; /** stride for an entire vertex for each buffer in dwords */ unsigned stride[PIPE_MAX_SO_BUFFERS]; /** * Array of stream outputs, in the order they are to be written in. * Selected components are tightly packed into the output buffer. */ struct { unsigned register_index:8; /**< 0 to PIPE_MAX_SHADER_OUTPUTS */ unsigned start_component:2; /** 0 to 3 */ unsigned num_components:3; /** 1 to 4 */ unsigned output_buffer:3; /**< 0 to PIPE_MAX_SO_BUFFERS */ unsigned dst_offset:16; /**< offset into the buffer in dwords */ } output[PIPE_MAX_SHADER_OUTPUTS]; }; struct pipe_shader_state { const struct tgsi_token *tokens; struct pipe_stream_output_info stream_output; }; struct pipe_depth_state { unsigned enabled:1; /**< depth test enabled? */ unsigned writemask:1; /**< allow depth buffer writes? */ unsigned func:3; /**< depth test func (PIPE_FUNC_x) */ }; struct pipe_stencil_state { unsigned enabled:1; /**< stencil[0]: stencil enabled, stencil[1]: two-side enabled */ unsigned func:3; /**< PIPE_FUNC_x */ unsigned fail_op:3; /**< PIPE_STENCIL_OP_x */ unsigned zpass_op:3; /**< PIPE_STENCIL_OP_x */ unsigned zfail_op:3; /**< PIPE_STENCIL_OP_x */ unsigned valuemask:8; unsigned writemask:8; }; struct pipe_alpha_state { unsigned enabled:1; unsigned func:3; /**< PIPE_FUNC_x */ float ref_value; /**< reference value */ }; struct pipe_depth_stencil_alpha_state { struct pipe_depth_state depth; struct pipe_stencil_state stencil[2]; /**< [0] = front, [1] = back */ struct pipe_alpha_state alpha; }; struct pipe_rt_blend_state { unsigned blend_enable:1; unsigned rgb_func:3; /**< PIPE_BLEND_x */ unsigned rgb_src_factor:5; /**< PIPE_BLENDFACTOR_x */ unsigned rgb_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ unsigned alpha_func:3; /**< PIPE_BLEND_x */ unsigned alpha_src_factor:5; /**< PIPE_BLENDFACTOR_x */ unsigned alpha_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ unsigned colormask:4; /**< bitmask of PIPE_MASK_R/G/B/A */ }; struct pipe_blend_state { unsigned independent_blend_enable:1; unsigned logicop_enable:1; unsigned logicop_func:4; /**< PIPE_LOGICOP_x */ unsigned dither:1; unsigned alpha_to_coverage:1; unsigned alpha_to_one:1; struct pipe_rt_blend_state rt[PIPE_MAX_COLOR_BUFS]; }; struct pipe_blend_color { float color[4]; }; struct pipe_stencil_ref { ubyte ref_value[2]; }; struct pipe_framebuffer_state { unsigned width, height; /** multiple color buffers for multiple render targets */ unsigned nr_cbufs; struct pipe_surface *cbufs[PIPE_MAX_COLOR_BUFS]; struct pipe_surface *zsbuf; /**< Z/stencil buffer */ }; /** * Texture sampler state. */ struct pipe_sampler_state { unsigned wrap_s:3; /**< PIPE_TEX_WRAP_x */ unsigned wrap_t:3; /**< PIPE_TEX_WRAP_x */ unsigned wrap_r:3; /**< PIPE_TEX_WRAP_x */ unsigned min_img_filter:2; /**< PIPE_TEX_FILTER_x */ unsigned min_mip_filter:2; /**< PIPE_TEX_MIPFILTER_x */ unsigned mag_img_filter:2; /**< PIPE_TEX_FILTER_x */ unsigned compare_mode:1; /**< PIPE_TEX_COMPARE_x */ unsigned compare_func:3; /**< PIPE_FUNC_x */ unsigned normalized_coords:1; /**< Are coords normalized to [0,1]? */ unsigned max_anisotropy:6; unsigned seamless_cube_map:1; float lod_bias; /**< LOD/lambda bias */ float min_lod, max_lod; /**< LOD clamp range, after bias */ union pipe_color_union border_color; }; /** * A view into a texture that can be bound to a color render target / * depth stencil attachment point. */ struct pipe_surface { struct pipe_reference reference; struct pipe_resource *texture; /**< resource into which this is a view */ struct pipe_context *context; /**< context this surface belongs to */ enum pipe_format format; /* XXX width/height should be removed */ unsigned width; /**< logical width in pixels */ unsigned height; /**< logical height in pixels */ unsigned usage; /**< bitmask of PIPE_BIND_x */ union { struct { unsigned level; unsigned first_layer:16; unsigned last_layer:16; } tex; struct { unsigned first_element; unsigned last_element; } buf; } u; }; /** * A view into a texture that can be bound to a shader stage. */ struct pipe_sampler_view { struct pipe_reference reference; enum pipe_format format; /**< typed PIPE_FORMAT_x */ struct pipe_resource *texture; /**< texture into which this is a view */ struct pipe_context *context; /**< context this view belongs to */ union { struct { unsigned first_layer:16; /**< first layer to use for array textures */ unsigned last_layer:16; /**< last layer to use for array textures */ unsigned first_level:8; /**< first mipmap level to use */ unsigned last_level:8; /**< last mipmap level to use */ } tex; struct { unsigned first_element; unsigned last_element; } buf; } u; unsigned swizzle_r:3; /**< PIPE_SWIZZLE_x for red component */ unsigned swizzle_g:3; /**< PIPE_SWIZZLE_x for green component */ unsigned swizzle_b:3; /**< PIPE_SWIZZLE_x for blue component */ unsigned swizzle_a:3; /**< PIPE_SWIZZLE_x for alpha component */ }; /** * Subregion of 1D/2D/3D image resource. */ struct pipe_box { unsigned x; unsigned y; unsigned z; unsigned width; unsigned height; unsigned depth; }; /** * A memory object/resource such as a vertex buffer or texture. */ struct pipe_resource { struct pipe_reference reference; struct pipe_screen *screen; /**< screen that this texture belongs to */ enum pipe_texture_target target; /**< PIPE_TEXTURE_x */ enum pipe_format format; /**< PIPE_FORMAT_x */ unsigned width0; unsigned height0; unsigned depth0; unsigned array_size; unsigned last_level:8; /**< Index of last mipmap level present/defined */ unsigned nr_samples:8; /**< for multisampled surfaces, nr of samples */ unsigned usage:8; /**< PIPE_USAGE_x (not a bitmask) */ unsigned bind; /**< bitmask of PIPE_BIND_x */ unsigned flags; /**< bitmask of PIPE_RESOURCE_FLAG_x */ /* XXX this is only temporary and will be removed once it's not needed */ uint8_t *user_ptr; /**< user buffer pointer */ }; /** * Transfer object. For data transfer to/from a resource. */ struct pipe_transfer { struct pipe_resource *resource; /**< resource to transfer to/from */ unsigned level; /**< texture mipmap level */ enum pipe_transfer_usage usage; struct pipe_box box; /**< region of the resource to access */ unsigned stride; /**< row stride in bytes */ unsigned layer_stride; /**< image/layer stride in bytes */ void *data; }; /** * A vertex buffer. Typically, all the vertex data/attributes for * drawing something will be in one buffer. But it's also possible, for * example, to put colors in one buffer and texcoords in another. */ struct pipe_vertex_buffer { unsigned stride; /**< stride to same attrib in next vertex, in bytes */ unsigned buffer_offset; /**< offset to start of data in buffer, in bytes */ struct pipe_resource *buffer; /**< the actual buffer */ }; /** * A constant buffer. A subrange of an existing buffer can be set * as a constant buffer. */ struct pipe_constant_buffer { struct pipe_resource *buffer; /**< the actual buffer */ unsigned buffer_offset; /**< offset to start of data in buffer, in bytes */ unsigned buffer_size; /**< how much data can be read in shader */ }; /** * A stream output target. The structure specifies the range vertices can * be written to. * * In addition to that, the structure should internally maintain the offset * into the buffer, which should be incremented everytime something is written * (appended) to it. The internal offset is buffer_offset + how many bytes * have been written. The internal offset can be stored on the device * and the CPU actually doesn't have to query it. * * Use PIPE_QUERY_SO_STATISTICS to know how many primitives have * actually been written. */ struct pipe_stream_output_target { struct pipe_reference reference; struct pipe_resource *buffer; /**< the output buffer */ struct pipe_context *context; /**< context this SO target belongs to */ unsigned buffer_offset; /**< offset where data should be written, in bytes */ unsigned buffer_size; /**< how much data is allowed to be written */ }; /** * Information to describe a vertex attribute (position, color, etc) */ struct pipe_vertex_element { /** Offset of this attribute, in bytes, from the start of the vertex */ unsigned src_offset; /** Instance data rate divisor. 0 means this is per-vertex data, * n means per-instance data used for n consecutive instances (n > 0). */ unsigned instance_divisor; /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does * this attribute live in? */ unsigned vertex_buffer_index; enum pipe_format src_format; }; /** * An index buffer. When an index buffer is bound, all indices to vertices * will be looked up in the buffer. */ struct pipe_index_buffer { unsigned index_size; /**< size of an index, in bytes */ unsigned offset; /**< offset to start of data in buffer, in bytes */ struct pipe_resource *buffer; /**< the actual buffer */ }; /** * Information to describe a draw_vbo call. */ struct pipe_draw_info { boolean indexed; /**< use index buffer */ unsigned mode; /**< the mode of the primitive */ unsigned start; /**< the index of the first vertex */ unsigned count; /**< number of vertices */ unsigned start_instance; /**< first instance id */ unsigned instance_count; /**< number of instances */ /** * For indexed drawing, these fields apply after index lookup. */ int index_bias; /**< a bias to be added to each index */ unsigned min_index; /**< the min index */ unsigned max_index; /**< the max index */ /** * Primitive restart enable/index (only applies to indexed drawing) */ boolean primitive_restart; unsigned restart_index; /** * Stream output target. If not NULL, it's used to provide the 'count' * parameter based on the number vertices captured by the stream output * stage. (or generally, based on the number of bytes captured) * * Only 'mode', 'start_instance', and 'instance_count' are taken into * account, all the other variables from pipe_draw_info are ignored. * * 'start' is implicitly 0 and 'count' is set as discussed above. * The draw command is non-indexed. * * Note that this only provides the count. The vertex buffers must * be set via set_vertex_buffers manually. */ struct pipe_stream_output_target *count_from_stream_output; }; /** * Information to describe a resource_resolve call. */ struct pipe_resolve_info { struct { struct pipe_resource *res; unsigned level; unsigned layer; int x0; /**< always left */ int y0; /**< always top */ int x1; /**< determines scale if PIPE_CAP_SCALED_RESOLVE is supported */ int y1; /**< determines scale if PIPE_CAP_SCALED_RESOLVE is supported */ } dst; struct { struct pipe_resource *res; unsigned layer; int x0; int y0; int x1; /**< may be < x0 only if PIPE_CAP_SCALED_RESOLVE is supported */ int y1; /**< may be < y1 even if PIPE_CAP_SCALED_RESOLVE not supported */ } src; unsigned mask; /**< PIPE_MASK_RGBA, Z, S or ZS */ }; #ifdef __cplusplus } #endif #endif