1 /* TSI 2023.xmo */ 2 /******************************************************************************* 3 * Copyright (c) 2023 Think Silicon Single Member PC 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a copy 6 * of this header file and/or associated documentation files to use, copy, 7 * modify, merge, publish, distribute, sublicense, and/or sell copies of the 8 * Materials, and to permit persons to whom the Materials are furnished to do 9 * so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Materials. 13 * 14 * MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS 15 * NEMAGFX API. THE UNMODIFIED, NORMATIVE VERSIONS OF THINK-SILICON NEMAGFX 16 * SPECIFICATIONS AND HEADER INFORMATION ARE LOCATED AT: 17 * https://think-silicon.com/products/software/nemagfx-api 18 * 19 * The software is provided 'as is', without warranty of any kind, express or 20 * implied, including but not limited to the warranties of merchantability, 21 * fitness for a particular purpose and noninfringement. In no event shall 22 * Think Silicon Single Member PC be liable for any claim, damages or other 23 * liability, whether in an action of contract, tort or otherwise, arising 24 * from, out of or in connection with the software or the use or other dealings 25 * in the software. 26 ******************************************************************************/ 27 28 29 #ifndef _NEMA_INTERPOLATORS_H_ 30 #define _NEMA_INTERPOLATORS_H_ 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include "nema_sys_defs.h" 37 38 typedef struct _color_var_t { 39 float r; /**< Red */ 40 float g; /**< Green */ 41 float b; /**< Blue */ 42 float a; /**< Alpha */ 43 } color_var_t; 44 45 /** \brief Interpolate color gradient for rectangle 46 * 47 * \param x0 x coordinate of the upper left vertex of the rectangle 48 * \param y0 y coordinate at the upper left vertex of the rectangle 49 * \param w width of the rectangle 50 * \param h height of the rectangle 51 * \param col0 color for the first vertex 52 * \param col1 color for the second vertex 53 * \param col1 color for the third vertex 54 * 55 */ 56 void nema_interpolate_rect_colors(int x0, int y0, int w, int h, color_var_t* col0, color_var_t* col1, color_var_t* col2); 57 58 59 /** \brief Interpolate color gradient for triangle 60 * 61 * \details The upper left vertex of the triangle to be drawn 62 * must be in the vertex arguments as well. In addition, if 63 * clipping is applied for rendering a triangle with gradient, 64 * the upper left vertex must be within the clipping area. 65 * \param x0 x coordinate at the first vertex of the triangle 66 * \param y0 y coordinate at the first vertex of the triangle 67 * \param x1 x coordinate at the second vertex of the triangle 68 * \param y1 y coordinate at the second vertex of the triangle 69 * \param x2 x coordinate at the third vertex of the triangle 70 * \param y2 y coordinate at the third vertex of the triangle 71 * \param col0 color for the first vertex 72 * \param col1 color for the second vertex 73 * \param col1 color for the third vertex 74 * 75 */ 76 void nema_interpolate_tri_colors(float x0, float y0, float x1, float y1, float x2, float y2, color_var_t* col0, color_var_t* col1, color_var_t* col2); 77 78 /** \brief Interpolate depth buffer values for triangle 79 * 80 * \param x0 x coordinate at the first vertex of the triangle 81 * \param y0 y coordinate at the first vertex of the triangle 82 * \param z0 z coordinate at the first vertex of the triangle 83 * \param x1 x coordinate at the second vertex of the triangle 84 * \param y1 y coordinate at the second vertex of the triangle 85 * \param z1 z coordinate at the second vertex of the triangle 86 * \param x2 x coordinate at the third vertex of the triangle 87 * \param y2 y coordinate at the third vertex of the triangle 88 * \param z2 z coordinate at the third vertex of the triangle 89 * 90 */ 91 void nema_interpolate_tri_depth(float x0, float y0, float z0, float x1, float y1, float z1, float x2, float y2, float z2); 92 93 /** \brief Interpolate texture values for triangle 94 * 95 * \param x0 x coordinate at the first vertex of the triangle 96 * \param y0 y coordinate at the first vertex of the triangle 97 * \param w0 w coordinate at the first vertex of the triangle 98 * \param tx0 x texture coordinate at the first vertex of the triangle 99 * \param ty0 y texture coordinate at the first vertex of the triangle 100 * \param x1 x coordinate at the second vertex of the triangle 101 * \param y1 y coordinate at the second vertex of the triangle 102 * \param w1 w coordinate at the second vertex of the triangle 103 * \param tx1 x texture coordinate at the second vertex of the triangle 104 * \param ty1 y texture coordinate at the second vertex of the triangle 105 * \param x2 x coordinate at the third vertex of the triangle 106 * \param y2 y coordinate at the third vertex of the triangle 107 * \param w2 w coordinate at the third vertex of the triangle 108 * \param tx2 x texture coordinate at the third vertex of the triangle 109 * \param ty2 x texture coordinate at the third vertex of the triangle 110 * \param tex_width texture width 111 * \param tex_height texture height 112 * 113 */ 114 void nema_interpolate_tx_ty(float x0, float y0, float w0, float tx0, float ty0, 115 float x1, float y1, float w1, float tx1, float ty1, 116 float x2, float y2, float w2, float tx2, float ty2, 117 int tex_width, int tex_height ); 118 #ifdef __cplusplus 119 } 120 #endif 121 122 #endif // _NEMA_INTERPOLATORS_H_ 123
