/************************************************************************** * * 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. * **************************************************************************/ /** * 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 6 #define PIPE_MAX_COLOR_BUFS 8 #define PIPE_MAX_CONSTANT 32 #define PIPE_MAX_SAMPLERS 16 #define PIPE_MAX_SHADER_INPUTS 16 #define PIPE_MAX_SHADER_OUTPUTS 16 #define PIPE_MAX_TEXTURE_LEVELS 16 /* fwd decls */ struct pipe_screen; struct pipe_surface; struct pipe_winsys; /** * The driver will certainly subclass this to include actual memory * management information. */ struct pipe_buffer { unsigned alignment; unsigned usage; unsigned size; /** Reference count */ unsigned refcount; }; /** * Primitive (point/line/tri) rasterization info */ struct pipe_rasterizer_state { unsigned flatshade:1; unsigned light_twoside:1; unsigned front_winding:2; /**< PIPE_WINDING_x */ unsigned cull_mode:2; /**< PIPE_WINDING_x */ unsigned fill_cw:2; /**< PIPE_POLYGON_MODE_x */ unsigned fill_ccw:2; /**< PIPE_POLYGON_MODE_x */ unsigned offset_cw:1; unsigned offset_ccw:1; unsigned scissor:1; unsigned poly_smooth:1; unsigned poly_stipple_enable:1; unsigned point_smooth:1; unsigned point_sprite:1; 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_stipple_factor:8; /**< [1..256] actually */ unsigned line_stipple_pattern:16; unsigned line_last_pixel:1; unsigned bypass_clipping:1; unsigned bypass_vs:1; /**< Skip the vertex shader. Note that the shader is still needed though, to indicate inputs/outputs */ unsigned origin_lower_left:1; /**< Is (0,0) the lower-left corner? */ unsigned flatshade_first:1; /**< take color attribute from the first vertex of a primitive */ unsigned gl_rasterization_rules:1; /**< enable tweaks for GL rasterization? */ float line_width; float point_size; /**< used when no per-vertex size */ float point_size_min; /* XXX - temporary, will go away */ float point_size_max; /* XXX - temporary, will go away */ float offset_units; float offset_scale; ubyte sprite_coord_mode[PIPE_MAX_SHADER_OUTPUTS]; /**< PIPE_SPRITE_COORD_ */ }; 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]; unsigned nr; }; /** * Constants for vertex/fragment shaders */ struct pipe_constant_buffer { struct pipe_buffer *buffer; unsigned size; /** in bytes (XXX: redundant!) */ }; struct pipe_shader_state { const struct tgsi_token *tokens; }; struct pipe_depth_stencil_alpha_state { struct { unsigned enabled:1; /**< depth test enabled? */ unsigned writemask:1; /**< allow depth buffer writes? */ unsigned func:3; /**< depth test func (PIPE_FUNC_x) */ unsigned occlusion_count:1; /**< do occlusion counting? */ } depth; struct { 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 */ ubyte ref_value; ubyte value_mask; ubyte write_mask; } stencil[2]; /**< [0] = front, [1] = back */ struct { unsigned enabled:1; unsigned func:3; /**< PIPE_FUNC_x */ float ref; /**< reference value */ } alpha; }; struct pipe_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 logicop_enable:1; unsigned logicop_func:4; /**< PIPE_LOGICOP_x */ unsigned colormask:4; /**< bitmask of PIPE_MASK_R/G/B/A */ unsigned dither:1; }; struct pipe_blend_color { float color[4]; }; struct pipe_framebuffer_state { unsigned width, height; /** multiple colorbuffers for multiple render targets */ unsigned num_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 prefilter:4; /**< Wierd sampling state exposed by some api's */ float shadow_ambient; /**< shadow test fail color/intensity */ float lod_bias; /**< LOD/lambda bias */ float min_lod, max_lod; /**< LOD clamp range, after bias */ float border_color[4]; float max_anisotropy; }; /** * 2D surface. This is basically a view into a memory buffer. * May be a renderbuffer, texture mipmap level, etc. */ struct pipe_surface { struct pipe_buffer *buffer; /**< surface's buffer/memory */ enum pipe_format format; /**< PIPE_FORMAT_x */ unsigned status; /**< PIPE_SURFACE_STATUS_x */ unsigned clear_value; /**< XXX may be temporary */ unsigned cpp; /**< bytes per pixel */ unsigned width; unsigned height; unsigned pitch; /**< in pixels */ unsigned offset; /**< offset from start of buffer, in bytes */ unsigned refcount; unsigned usage; /**< PIPE_BUFFER_USAGE_* */ struct pipe_winsys *winsys; /**< winsys which owns/created the surface */ struct pipe_texture *texture; /**< optional texture into which this is a view */ }; /** * Texture object. */ struct pipe_texture { enum pipe_texture_target target; /**< PIPE_TEXTURE_x */ enum pipe_format format; /**< PIPE_FORMAT_x */ unsigned width[PIPE_MAX_TEXTURE_LEVELS]; unsigned height[PIPE_MAX_TEXTURE_LEVELS]; unsigned depth[PIPE_MAX_TEXTURE_LEVELS]; unsigned cpp:8; unsigned last_level:8; /**< Index of last mipmap level present/defined */ unsigned compressed:1; /* These are also refcounted: */ unsigned refcount; struct pipe_screen *screen; /**< screen that this texture belongs to */ }; /** * 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 pitch; /**< stride to same attrib in next vertex, in bytes */ unsigned max_index; /**< number of vertices in this buffer */ unsigned buffer_offset; /**< offset to start of data in buffer, in bytes */ struct pipe_buffer *buffer; /**< the actual buffer */ }; /** * 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; /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does * this attribute live in? */ unsigned vertex_buffer_index:8; unsigned nr_components:8; enum pipe_format src_format; /**< PIPE_FORMAT_* */ }; #ifdef __cplusplus } #endif #endif