172 lines
6.8 KiB
C++
172 lines
6.8 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup gpu
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*
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* Utility drawing functions (rough equivalent to OpenGL's GLU)
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*/
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#pragma once
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/* Draw 2D rectangles (replaces glRect functions) */
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/* caller is responsible for vertex format & shader */
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void immRectf(uint pos, float x1, float y1, float x2, float y2);
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void immRecti(uint pos, int x1, int y1, int x2, int y2);
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/**
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* Same as #immRectf / #immRecti but does not call #immBegin / #immEnd.
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* To use with #GPU_PRIM_TRIS.
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*/
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void immRectf_fast(uint pos, float x1, float y1, float x2, float y2);
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void immRectf_fast_with_color(
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uint pos, uint col, float x1, float y1, float x2, float y2, const float color[4]);
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void immRecti_fast_with_color(
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uint pos, uint col, int x1, int y1, int x2, int y2, const float color[4]);
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/**
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* Pack color into 3 bytes
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*
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* This define converts a numerical value to the equivalent 24-bit
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* color, while not being endian-sensitive. On little-endian, this
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* is the same as doing a 'naive' indexing, on big-endian, it is not!
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*
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* \note BGR format (i.e. 0xBBGGRR)...
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*
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* \param x: color.
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*/
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void imm_cpack(uint x);
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/**
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* Draw a circle outline with the given \a radius.
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* The circle is centered at \a x, \a y and drawn in the XY plane.
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*
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* \param shdr_pos: The vertex attribute number for position.
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* \param x: Horizontal center.
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* \param y: Vertical center.
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* \param radius: The circle's radius.
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* \param nsegments: The number of segments to use in drawing (more = smoother).
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*/
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void imm_draw_circle_wire_2d(uint shdr_pos, float x, float y, float radius, int nsegments);
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/**
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* Draw a filled circle with the given \a radius.
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* The circle is centered at \a x, \a y and drawn in the XY plane.
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*
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* \param shdr_pos: The vertex attribute number for position.
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* \param x: Horizontal center.
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* \param y: Vertical center.
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* \param radius: The circle's radius.
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* \param nsegments: The number of segments to use in drawing (more = smoother).
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*/
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void imm_draw_circle_fill_2d(uint shdr_pos, float x, float y, float radius, int nsegments);
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void imm_draw_circle_wire_aspect_2d(
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uint shdr_pos, float x, float y, float radius_x, float radius_y, int nsegments);
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void imm_draw_circle_fill_aspect_2d(
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uint shdr_pos, float x, float y, float radius_x, float radius_y, int nsegments);
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/**
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* Use this version when #GPUVertFormat has a vec3 position.
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*/
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void imm_draw_circle_wire_3d(uint pos, float x, float y, float radius, int nsegments);
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void imm_draw_circle_wire_aspect_3d(
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uint pos, float x, float y, float radius_x, float radius_y, int nsegments);
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void imm_draw_circle_dashed_3d(uint pos, float x, float y, float radius, int nsegments);
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void imm_draw_circle_fill_3d(uint pos, float x, float y, float radius, int nsegments);
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void imm_draw_circle_fill_aspect_3d(
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uint pos, float x, float y, float radius_x, float radius_y, int nsegments);
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/**
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* Same as 'imm_draw_disk_partial_fill_2d', except it draws a wire arc.
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*/
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void imm_draw_circle_partial_wire_2d(
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uint pos, float x, float y, float radius, int nsegments, float start, float sweep);
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void imm_draw_circle_partial_wire_3d(
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uint pos, float x, float y, float z, float radius, int nsegments, float start, float sweep);
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/**
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* Draw a filled arc with the given inner and outer radius.
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* The circle is centered at \a x, \a y and drawn in the XY plane.
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*
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* \note Arguments are `gluPartialDisk` compatible.
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*
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* \param pos: The vertex attribute number for position.
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* \param x: Horizontal center.
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* \param y: Vertical center.
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* \param rad_inner: The inner circle's radius.
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* \param rad_outer: The outer circle's radius (can be zero).
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* \param nsegments: The number of segments to use in drawing (more = smoother).
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* \param start: Specifies the starting angle, in degrees, of the disk portion.
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* \param sweep: Specifies the sweep angle, in degrees, of the disk portion.
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*/
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void imm_draw_disk_partial_fill_2d(uint pos,
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float x,
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float y,
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float rad_inner,
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float rad_outer,
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int nsegments,
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float start,
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float sweep);
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void imm_draw_disk_partial_fill_3d(uint pos,
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float x,
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float y,
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float z,
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float rad_inner,
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float rad_outer,
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int nsegments,
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float start,
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float sweep);
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/**
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* Draw a lined box.
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*
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* \param pos: The vertex attribute number for position.
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* \param x1: left.
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* \param y1: bottom.
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* \param x2: right.
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* \param y2: top.
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*/
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void imm_draw_box_wire_2d(uint pos, float x1, float y1, float x2, float y2);
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void imm_draw_box_wire_3d(uint pos, float x1, float y1, float x2, float y2);
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/**
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* Draw a standard checkerboard to indicate transparent backgrounds.
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*/
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void imm_draw_box_checker_2d_ex(float x1,
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float y1,
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float x2,
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float y2,
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const float color_primary[4],
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const float color_secondary[4],
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int checker_size);
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void imm_draw_box_checker_2d(float x1, float y1, float x2, float y2);
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void imm_draw_cube_fill_3d(uint pos, const float center[3], const float aspect[3]);
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void imm_draw_cube_wire_3d(uint pos, const float center[3], const float aspect[3]);
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void imm_draw_cube_corners_3d(uint pos,
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const float center[3],
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const float aspect[3],
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float factor);
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/**
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* Draw a cylinder. Replacement for #gluCylinder.
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* \warning Slow, better use it only if you no other choices.
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*
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* \param pos: The vertex attribute number for position.
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* \param nor: The vertex attribute number for normal.
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* \param base: Specifies the radius of the cylinder at z = 0.
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* \param top: Specifies the radius of the cylinder at z = height.
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* \param height: Specifies the height of the cylinder.
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* \param slices: Specifies the number of subdivisions around the z axis.
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* \param stacks: Specifies the number of subdivisions along the z axis.
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*/
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void imm_draw_cylinder_fill_normal_3d(
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uint pos, uint nor, float base, float top, float height, int slices, int stacks);
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void imm_draw_cylinder_wire_3d(
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uint pos, float base, float top, float height, int slices, int stacks);
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void imm_draw_cylinder_fill_3d(
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uint pos, float base, float top, float height, int slices, int stacks);
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void imm_drawcircball(const float cent[3], float radius, const float tmat[4][4], uint pos);
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