-
-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
shaders_postprocessing.c
177 lines (148 loc) · 8.09 KB
/
shaders_postprocessing.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/*******************************************************************************************
*
* raylib [shaders] example - Apply a postprocessing shader to a scene
*
* NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
* OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version.
*
* NOTE: Shaders used in this example are #version 330 (OpenGL 3.3), to test this example
* on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
* raylib comes with shaders ready for both versions, check raylib/shaders install folder
*
* Example originally created with raylib 1.3, last time updated with raylib 4.0
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
*
* Copyright (c) 2015-2024 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#if defined(PLATFORM_DESKTOP)
#define GLSL_VERSION 330
#else // PLATFORM_ANDROID, PLATFORM_WEB
#define GLSL_VERSION 100
#endif
#define MAX_POSTPRO_SHADERS 12
typedef enum {
FX_GRAYSCALE = 0,
FX_POSTERIZATION,
FX_DREAM_VISION,
FX_PIXELIZER,
FX_CROSS_HATCHING,
FX_CROSS_STITCHING,
FX_PREDATOR_VIEW,
FX_SCANLINES,
FX_FISHEYE,
FX_SOBEL,
FX_BLOOM,
FX_BLUR,
//FX_FXAA
} PostproShader;
static const char *postproShaderText[] = {
"GRAYSCALE",
"POSTERIZATION",
"DREAM_VISION",
"PIXELIZER",
"CROSS_HATCHING",
"CROSS_STITCHING",
"PREDATOR_VIEW",
"SCANLINES",
"FISHEYE",
"SOBEL",
"BLOOM",
"BLUR",
//"FXAA"
};
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
SetConfigFlags(FLAG_MSAA_4X_HINT); // Enable Multi Sampling Anti Aliasing 4x (if available)
InitWindow(screenWidth, screenHeight, "raylib [shaders] example - postprocessing shader");
// Define the camera to look into our 3d world
Camera camera = { 0 };
camera.position = (Vector3){ 2.0f, 3.0f, 2.0f }; // Camera position
camera.target = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera looking at point
camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target)
camera.fovy = 45.0f; // Camera field-of-view Y
camera.projection = CAMERA_PERSPECTIVE; // Camera projection type
Model model = LoadModel("resources/models/church.obj"); // Load OBJ model
Texture2D texture = LoadTexture("resources/models/church_diffuse.png"); // Load model texture (diffuse map)
model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture; // Set model diffuse texture
Vector3 position = { 0.0f, 0.0f, 0.0f }; // Set model position
// Load all postpro shaders
// NOTE 1: All postpro shader use the base vertex shader (DEFAULT_VERTEX_SHADER)
// NOTE 2: We load the correct shader depending on GLSL version
Shader shaders[MAX_POSTPRO_SHADERS] = { 0 };
// NOTE: Defining 0 (NULL) for vertex shader forces usage of internal default vertex shader
shaders[FX_GRAYSCALE] = LoadShader(0, TextFormat("resources/shaders/glsl%i/grayscale.fs", GLSL_VERSION));
shaders[FX_POSTERIZATION] = LoadShader(0, TextFormat("resources/shaders/glsl%i/posterization.fs", GLSL_VERSION));
shaders[FX_DREAM_VISION] = LoadShader(0, TextFormat("resources/shaders/glsl%i/dream_vision.fs", GLSL_VERSION));
shaders[FX_PIXELIZER] = LoadShader(0, TextFormat("resources/shaders/glsl%i/pixelizer.fs", GLSL_VERSION));
shaders[FX_CROSS_HATCHING] = LoadShader(0, TextFormat("resources/shaders/glsl%i/cross_hatching.fs", GLSL_VERSION));
shaders[FX_CROSS_STITCHING] = LoadShader(0, TextFormat("resources/shaders/glsl%i/cross_stitching.fs", GLSL_VERSION));
shaders[FX_PREDATOR_VIEW] = LoadShader(0, TextFormat("resources/shaders/glsl%i/predator.fs", GLSL_VERSION));
shaders[FX_SCANLINES] = LoadShader(0, TextFormat("resources/shaders/glsl%i/scanlines.fs", GLSL_VERSION));
shaders[FX_FISHEYE] = LoadShader(0, TextFormat("resources/shaders/glsl%i/fisheye.fs", GLSL_VERSION));
shaders[FX_SOBEL] = LoadShader(0, TextFormat("resources/shaders/glsl%i/sobel.fs", GLSL_VERSION));
shaders[FX_BLOOM] = LoadShader(0, TextFormat("resources/shaders/glsl%i/bloom.fs", GLSL_VERSION));
shaders[FX_BLUR] = LoadShader(0, TextFormat("resources/shaders/glsl%i/blur.fs", GLSL_VERSION));
int currentShader = FX_GRAYSCALE;
// Create a RenderTexture2D to be used for render to texture
RenderTexture2D target = LoadRenderTexture(screenWidth, screenHeight);
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
UpdateCamera(&camera, CAMERA_ORBITAL);
if (IsKeyPressed(KEY_RIGHT)) currentShader++;
else if (IsKeyPressed(KEY_LEFT)) currentShader--;
if (currentShader >= MAX_POSTPRO_SHADERS) currentShader = 0;
else if (currentShader < 0) currentShader = MAX_POSTPRO_SHADERS - 1;
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(RAYWHITE); // Clear texture background
BeginMode3D(camera); // Begin 3d mode drawing
DrawModel(model, position, 0.1f, WHITE); // Draw 3d model with texture
DrawGrid(10, 1.0f); // Draw a grid
EndMode3D(); // End 3d mode drawing, returns to orthographic 2d mode
EndTextureMode(); // End drawing to texture (now we have a texture available for next passes)
BeginDrawing();
ClearBackground(RAYWHITE); // Clear screen background
// Render generated texture using selected postprocessing shader
BeginShaderMode(shaders[currentShader]);
// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
DrawTextureRec(target.texture, (Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height }, (Vector2){ 0, 0 }, WHITE);
EndShaderMode();
// Draw 2d shapes and text over drawn texture
DrawRectangle(0, 9, 580, 30, Fade(LIGHTGRAY, 0.7f));
DrawText("(c) Church 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);
DrawText("CURRENT POSTPRO SHADER:", 10, 15, 20, BLACK);
DrawText(postproShaderText[currentShader], 330, 15, 20, RED);
DrawText("< >", 540, 10, 30, DARKBLUE);
DrawFPS(700, 15);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
// Unload all postpro shaders
for (int i = 0; i < MAX_POSTPRO_SHADERS; i++) UnloadShader(shaders[i]);
UnloadTexture(texture); // Unload texture
UnloadModel(model); // Unload model
UnloadRenderTexture(target); // Unload render texture
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}