raylib/ports/textures/textures_npatch_drawing

Source

textures_npatch_drawing.odin ¶

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1/*******************************************************************************************
2*
3*   raylib [textures] example - npatch drawing
4*
5*   Example complexity rating: [★★★☆] 3/4
6*
7*   NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
8*
9*   Example originally created with raylib 2.0, last time updated with raylib 2.5
10*
11*   Example contributed by Jorge A. Gomes (@overdev) and reviewed by Ramon Santamaria (@raysan5)
12*
13*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
14*   BSD-like license that allows static linking with closed source software
15*
16*   Copyright (c) 2018-2025 Jorge A. Gomes (@overdev) and Ramon Santamaria (@raysan5)
17*
18********************************************************************************************/
19
20package raylib_examples
21
22import rl "vendor:raylib"
23
24//------------------------------------------------------------------------------------
25// Program main entry point
26//------------------------------------------------------------------------------------
27main :: proc() {
28	// Initialization
29	//--------------------------------------------------------------------------------------
30	SCREEN_WIDTH :: 800
31	SCREEN_HEIGHT :: 450
32
33	rl.InitWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "raylib [textures] example - npatch drawing")
34
35	// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
36	n_patch_texture := rl.LoadTexture("resources/ninepatch_button.png")
37
38	mouse_position: rl.Vector2
39	origin: rl.Vector2
40
41	// Position and size of the n-patches
42	dstRec1 := rl.Rectangle {480, 160, 32, 32}
43	dstRec2 := rl.Rectangle {160, 160, 32, 32}
44	dstRecH := rl.Rectangle {160, 93, 32, 32}
45	dstRecV := rl.Rectangle {92, 160, 32, 32}
46
47	// A 9-patch (NPATCH_NINE_PATCH) changes its sizes in both axis
48	nine_patch_info_1 := rl.NPatchInfo {{0, 0, 64, 64}, 12, 40, 12, 12, .NINE_PATCH}
49	nine_patch_info_2 := rl.NPatchInfo {{0, 128, 64, 64}, 16, 16, 16, 16, .NINE_PATCH}
50
51	// A horizontal 3-patch (NPATCH_THREE_PATCH_HORIZONTAL) changes its sizes along the x axis only
52	h3_patch_info := rl.NPatchInfo {{0, 64, 64, 64}, 8, 8, 8, 8, .THREE_PATCH_HORIZONTAL}
53
54	// A vertical 3-patch (NPATCH_THREE_PATCH_VERTICAL) changes its sizes along the y axis only
55	v3_patch_info := rl.NPatchInfo {{0, 192, 64, 64}, 6, 6, 6, 6, .THREE_PATCH_VERTICAL}
56
57	rl.SetTargetFPS(60)
58	//---------------------------------------------------------------------------------------
59
60	// Main game loop
61	for !rl.WindowShouldClose() {    // Detect window close button or ESC key
62		// Update
63		//----------------------------------------------------------------------------------
64		mouse_position = rl.GetMousePosition()
65
66		// Resize the n-patches based on mouse position
67		dstRec1.width = mouse_position.x - dstRec1.x
68		dstRec1.height = mouse_position.y - dstRec1.y
69		dstRec2.width = mouse_position.x - dstRec2.x
70		dstRec2.height = mouse_position.y - dstRec2.y
71		dstRecH.width = mouse_position.x - dstRecH.x
72		dstRecV.height = mouse_position.y - dstRecV.y
73
74		// Set a minimum width and/or height
75		if dstRec1.width < 1 {
76			dstRec1.width = 1
77		}
78		if dstRec1.width > 300 {
79			dstRec1.width = 300
80		}
81		if dstRec1.height < 1 {
82			dstRec1.height = 1
83		}
84		if dstRec2.width < 1 {
85			dstRec2.width = 1
86		}
87		if dstRec2.width > 300 {
88			dstRec2.width = 300
89		}
90		if dstRec2.height < 1 {
91			dstRec2.height = 1
92		}
93		if dstRecH.width < 1 {
94			dstRecH.width = 1
95		}
96		if dstRecV.height < 1 {
97			dstRecV.height = 1
98		}
99		//----------------------------------------------------------------------------------
100
101		// Draw
102		//----------------------------------------------------------------------------------
103		rl.BeginDrawing()
104
105			rl.ClearBackground(rl.RAYWHITE)
106
107			// Draw the n-patches
108			rl.DrawTextureNPatch(n_patch_texture, nine_patch_info_2, dstRec2, origin, 0, rl.WHITE)
109			rl.DrawTextureNPatch(n_patch_texture, nine_patch_info_1, dstRec1, origin, 0, rl.WHITE)
110			rl.DrawTextureNPatch(n_patch_texture, h3_patch_info, dstRecH, origin, 0, rl.WHITE)
111			rl.DrawTextureNPatch(n_patch_texture, v3_patch_info, dstRecV, origin, 0, rl.WHITE)
112
113			// Draw the source texture
114			rl.DrawRectangleLines(5, 88, 74, 266, rl.BLUE)
115			rl.DrawTexture(n_patch_texture, 10, 93, rl.WHITE)
116			rl.DrawText("TEXTURE", 15, 360, 10, rl.DARKGRAY)
117
118			rl.DrawText("Move the mouse to stretch or shrink the n-patches", 10, 20, 20, rl.DARKGRAY)
119
120		rl.EndDrawing()
121		//----------------------------------------------------------------------------------
122	}
123
124	// De-Initialization
125	//--------------------------------------------------------------------------------------
126	rl.UnloadTexture(n_patch_texture)       // Texture unloading
127
128	rl.CloseWindow()                // Close window and OpenGL context
129	//--------------------------------------------------------------------------------------
130}