1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 12 /**************************************************************************/ 13 /**************************************************************************/ 14 /** */ 15 /** GUIX Component */ 16 /** */ 17 /** Canvas Management (Canvas) */ 18 /** */ 19 /**************************************************************************/ 20 21 #define GX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "gx_api.h" 27 #include "gx_system.h" 28 #include "gx_utility.h" 29 #include "gx_canvas.h" 30 31 32 /**************************************************************************/ 33 /* */ 34 /* FUNCTION RELEASE */ 35 /* */ 36 /* _gx_canvas_pixelmap_tile PORTABLE C */ 37 /* 6.1 */ 38 /* AUTHOR */ 39 /* */ 40 /* Kenneth Maxwell, Microsoft Corporation */ 41 /* */ 42 /* DESCRIPTION */ 43 /* */ 44 /* This function prepares to draw the specified pixelmap at the */ 45 /* requested position. */ 46 /* */ 47 /* INPUT */ 48 /* */ 49 /* fill Area to fill with pixelmap */ 50 /* pixelmap Pointer to actual pixelmap */ 51 /* to draw */ 52 /* */ 53 /* OUTPUT */ 54 /* */ 55 /* status Completion status */ 56 /* */ 57 /* CALLS */ 58 /* */ 59 /* _gx_utility_rectangle_overlap_detect Detect rectangle overlap */ 60 /* _gx_canvas_pixelmap_draw Screen pixelmap draw routine */ 61 /* */ 62 /* CALLED BY */ 63 /* */ 64 /* Application Code */ 65 /* */ 66 /* RELEASE HISTORY */ 67 /* */ 68 /* DATE NAME DESCRIPTION */ 69 /* */ 70 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 71 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 72 /* resulting in version 6.1 */ 73 /* */ 74 /**************************************************************************/ _gx_canvas_pixelmap_tile(GX_RECTANGLE * fill,GX_PIXELMAP * pixelmap)75UINT _gx_canvas_pixelmap_tile(GX_RECTANGLE *fill, GX_PIXELMAP *pixelmap) 76 { 77 GX_VALUE xpos; 78 GX_VALUE ypos; 79 GX_DRAW_CONTEXT *context; 80 GX_RECTANGLE oldclip; 81 82 /* pick up the current drawing context */ 83 context = _gx_system_current_draw_context; 84 85 /* save the current dirty area */ 86 oldclip = context -> gx_draw_context_dirty; 87 88 /* clip to the fill rectangle */ 89 if (!_gx_utility_rectangle_overlap_detect(fill, &context -> gx_draw_context_dirty, 90 &context -> gx_draw_context_dirty)) 91 { 92 context -> gx_draw_context_dirty = oldclip; 93 94 /* nothing to draw, return */ 95 return GX_SUCCESS; 96 } 97 98 if (!pixelmap -> gx_pixelmap_width || 99 !pixelmap -> gx_pixelmap_height) 100 { 101 context -> gx_draw_context_dirty = oldclip; 102 return GX_FAILURE; 103 } 104 105 /* pickup starting y position */ 106 ypos = fill -> gx_rectangle_top; 107 108 /* loop from top to bottom */ 109 while (ypos <= fill -> gx_rectangle_bottom) 110 { 111 /* pickup starting x position */ 112 xpos = fill -> gx_rectangle_left; 113 114 /* loop from left to right */ 115 while (xpos <= fill -> gx_rectangle_right) 116 { 117 /* draw one tile */ 118 _gx_canvas_pixelmap_draw(xpos, ypos, pixelmap); 119 120 /* move to the right by one tile width */ 121 xpos = (GX_VALUE)(xpos + pixelmap -> gx_pixelmap_width); 122 } 123 124 /* move down by one tile height */ 125 ypos = (GX_VALUE)(ypos + pixelmap -> gx_pixelmap_height); 126 } 127 128 /* restore dirty rectangle */ 129 context -> gx_draw_context_dirty = oldclip; 130 131 /* Return successful completion. */ 132 133 return(GX_SUCCESS); 134 } 135 136
