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Diffstat (limited to 'src/mesa/pipe/p_state.h')
| -rw-r--r-- | src/mesa/pipe/p_state.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/src/mesa/pipe/p_state.h b/src/mesa/pipe/p_state.h new file mode 100644 index 0000000000..fd5e7ad3af --- /dev/null +++ b/src/mesa/pipe/p_state.h @@ -0,0 +1,298 @@ +/************************************************************************** + * + * 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 "mtypes.h" + + + +/** + * Implementation limits + */ +#define PIPE_MAX_SAMPLERS 8 +#define PIPE_MAX_CLIP_PLANES 6 +#define PIPE_MAX_CONSTANT 32 +#define PIPE_ATTRIB_MAX 32 +#define PIPE_MAX_COLOR_BUFS 8 + + +/* fwd decl */ +struct pipe_surface; + + +/*** + *** State objects + ***/ + + +/** + * Primitive (point/line/tri) setup info + */ +struct pipe_setup_state +{ + GLuint flatshade:1; + GLuint light_twoside:1; + + GLuint front_winding:2; /**< PIPE_WINDING_x */ + + GLuint cull_mode:2; /**< PIPE_WINDING_x */ + + GLuint fill_cw:2; /**< PIPE_POLYGON_MODE_x */ + GLuint fill_ccw:2; /**< PIPE_POLYGON_MODE_x */ + + GLuint offset_cw:1; + GLuint offset_ccw:1; + + GLuint scissor:1; + + GLuint poly_smooth:1; + GLuint poly_stipple_enable:1; + + GLuint line_smooth:1; + GLuint line_stipple_enable:1; + + GLuint point_smooth:1; + + GLuint multisample:1; /* XXX maybe more ms state in future */ + + GLubyte line_stipple_factor; /**< [1..256] actually */ + GLushort line_stipple_pattern; + GLfloat line_width; + GLfloat point_size; /**< used when no per-vertex size */ + GLfloat offset_units; + GLfloat offset_scale; +}; + +struct pipe_poly_stipple { + GLuint stipple[32]; +}; + + +struct pipe_viewport_state { + GLfloat scale[4]; + GLfloat translate[4]; +}; + +struct pipe_scissor_state { + GLshort minx; + GLshort miny; + GLshort maxx; + GLshort maxy; +}; + +struct pipe_clip_state { + GLfloat ucp[PIPE_MAX_CLIP_PLANES][4]; + GLuint nr; +}; + +struct pipe_fs_state { + struct gl_fragment_program *fp; +}; + +struct pipe_constant_buffer { + GLfloat constant[PIPE_MAX_CONSTANT][4]; + GLuint nr_constants; +}; + + +struct pipe_depth_state +{ + GLuint enabled:1; /**< depth test enabled? */ + GLuint writemask:1; /**< allow depth buffer writes? */ + GLuint func:3; /**< depth test func (PIPE_FUNC_x) */ + GLuint occlusion_count:1; /**< XXX move this elsewhere? */ + GLfloat clear; /**< Clear value in [0,1] (XXX correct place?) */ +}; + +struct pipe_alpha_test_state { + GLuint enabled:1; + GLuint func:3; /**< PIPE_FUNC_x */ + GLfloat ref; /**< reference value */ +}; + +struct pipe_blend_state { + GLuint blend_enable:1; + + GLuint rgb_func:3; /**< PIPE_BLEND_x */ + GLuint rgb_src_factor:5; /**< PIPE_BLENDFACTOR_x */ + GLuint rgb_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ + + GLuint alpha_func:3; /**< PIPE_BLEND_x */ + GLuint alpha_src_factor:5; /**< PIPE_BLENDFACTOR_x */ + GLuint alpha_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ + + GLuint logicop_enable:1; + GLuint logicop_func:4; /**< PIPE_LOGICOP_x */ + + GLuint colormask:4; /**< bitmask of PIPE_MASK_R/G/B/A */ + GLuint dither:1; +}; + +struct pipe_blend_color { + GLfloat color[4]; +}; + +struct pipe_clear_color_state +{ + GLfloat color[4]; +}; + +struct pipe_stencil_state { + GLuint front_enabled:1; + GLuint front_func:3; /**< PIPE_FUNC_x */ + GLuint front_fail_op:3; /**< PIPE_STENCIL_OP_x */ + GLuint front_zpass_op:3; /**< PIPE_STENCIL_OP_x */ + GLuint front_zfail_op:3; /**< PIPE_STENCIL_OP_x */ + GLuint back_enabled:1; + GLuint back_func:3; /**< PIPE_FUNC_x */ + GLuint back_fail_op:3; /**< PIPE_STENCIL_OP_x */ + GLuint back_zpass_op:3; /**< PIPE_STENCIL_OP_x */ + GLuint back_zfail_op:3; /**< PIPE_STENCIL_OP_x */ + GLubyte ref_value[2]; /**< [0] = front, [1] = back */ + GLubyte value_mask[2]; + GLubyte write_mask[2]; + GLubyte clear_value; +}; + + +struct pipe_framebuffer_state +{ + /** multiple colorbuffers for multiple render targets */ + GLuint num_cbufs; + struct pipe_surface *cbufs[PIPE_MAX_COLOR_BUFS]; + + struct pipe_surface *zbuf; /**< Z buffer */ + struct pipe_surface *sbuf; /**< Stencil buffer */ + struct pipe_surface *abuf; /**< Accum buffer */ +}; + + +/** + * Texture sampler state. + */ +struct pipe_sampler_state +{ + GLuint wrap_s:3; /**< PIPE_TEX_WRAP_x */ + GLuint wrap_t:3; /**< PIPE_TEX_WRAP_x */ + GLuint wrap_r:3; /**< PIPE_TEX_WRAP_x */ + GLuint min_filter:3; /**< PIPE_TEX_FILTER_x */ + GLuint mag_filter:1; /**< PIPE_TEX_FILTER_LINEAR or _NEAREST */ + GLuint compare:1; /**< shadow/depth compare enabled? */ + GLenum compare_mode:1; /**< PIPE_TEX_COMPARE_x */ + GLenum compare_func:3; /**< PIPE_FUNC_x */ + GLfloat shadow_ambient; /**< shadow test fail color/intensity */ + GLfloat min_lod; + GLfloat max_lod; + GLfloat lod_bias; +#if 0 /* need these? */ + GLint BaseLevel; /**< min mipmap level, OpenGL 1.2 */ + GLint MaxLevel; /**< max mipmap level, OpenGL 1.2 */ + GLfloat border_color[4]; +#endif + GLfloat max_anisotropy; +}; + + +/*** + *** Non-state Objects + ***/ + + +/** + * A mappable buffer (vertex data, pixel data, etc) + */ +struct pipe_buffer +{ + void (*buffer_data)(struct pipe_buffer *pb, GLuint size, const void *src); + void (*buffer_sub_data)(struct pipe_buffer *pb, GLuint offset, GLuint size, + const void *src); + void *(*map)(struct pipe_buffer *pb, GLuint access_mode); + void (*unmap)(struct pipe_buffer *pb); + void *ptr; /**< address, only valid while mapped */ + GLuint mode; /**< PIPE_MAP_x, only valid while mapped */ +}; + + +/** + * 2D surface. + * May be a renderbuffer, texture mipmap level, etc. + */ +struct pipe_surface +{ + struct pipe_buffer buffer; /**< surfaces can be mapped */ + GLuint format:5; /**< PIPE_FORMAT_x */ + GLuint width, height; +#if 0 + GLubyte *ptr; + GLint stride; + GLuint cpp; + GLuint format; +#endif +}; + + +/** + * Texture object. + * Mipmap levels, cube faces, 3D slices can be accessed as surfaces. + */ +struct pipe_texture_object +{ + GLuint type:2; /**< PIPE_TEXTURE_x */ + GLuint format:5; /**< PIPE_FORMAT_x */ + GLuint width:13; /**< 13 bits = 8K max size */ + GLuint height:13; + GLuint depth:13; + GLuint mipmapped:1; + + /** to access a 1D or 2D texture object as a surface */ + struct pipe_surface *(*get_2d_surface)(struct pipe_texture_object *pto, + GLuint level); + /** to access a 3D texture object as a surface */ + struct pipe_surface *(*get_3d_surface)(struct pipe_texture_object *pto, + GLuint level, GLuint slice); + /** to access a cube texture object as a surface */ + struct pipe_surface *(*get_cube_surface)(struct pipe_texture_object *pto, + GLuint face, GLuint level); + /** when finished with surface: */ + void (*release_surface)(struct pipe_texture_object *pto, + struct pipe_surface *ps); +}; + + +#endif |