131 lines
4.5 KiB
C
131 lines
4.5 KiB
C
/*******************************************************************************************
|
|
*
|
|
* raylib [textures] example - Image loading and texture creation
|
|
*
|
|
* NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
|
|
*
|
|
* Example originally created with raylib 1.3, last time updated with raylib 1.3
|
|
*
|
|
* 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 Karim Salem (@kimo-s)
|
|
*
|
|
********************************************************************************************/
|
|
|
|
#include "raylib.h"
|
|
|
|
//------------------------------------------------------------------------------------
|
|
// Program main entry point
|
|
//------------------------------------------------------------------------------------
|
|
void NormalizeKernel(float *kernel, int size)
|
|
{
|
|
float sum = 0.0f;
|
|
for (int i = 0; i < size; i++) sum += kernel[i];
|
|
|
|
if (sum != 0.0f)
|
|
{
|
|
for (int i = 0; i < size; i++) kernel[i] /= sum;
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
// Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
const int screenWidth = 800;
|
|
const int screenHeight = 450;
|
|
|
|
InitWindow(screenWidth, screenHeight, "raylib [textures] example - image convolution");
|
|
|
|
Image image = LoadImage("resources/cat.png"); // Loaded in CPU memory (RAM)
|
|
|
|
float gaussiankernel[] = {
|
|
1.0f, 2.0f, 1.0f,
|
|
2.0f, 4.0f, 2.0f,
|
|
1.0f, 2.0f, 1.0f };
|
|
|
|
float sobelkernel[] = {
|
|
1.0f, 0.0f, -1.0f,
|
|
2.0f, 0.0f, -2.0f,
|
|
1.0f, 0.0f, -1.0f };
|
|
|
|
float sharpenkernel[] = {
|
|
0.0f, -1.0f, 0.0f,
|
|
-1.0f, 5.0f, -1.0f,
|
|
0.0f, -1.0f, 0.0f };
|
|
|
|
NormalizeKernel(gaussiankernel, 9);
|
|
NormalizeKernel(sharpenkernel, 9);
|
|
NormalizeKernel(sobelkernel, 9);
|
|
|
|
Image catSharpend = ImageCopy(image);
|
|
ImageKernelConvolution(&catSharpend, sharpenkernel, 9);
|
|
|
|
Image catSobel = ImageCopy(image);
|
|
ImageKernelConvolution(&catSobel, sobelkernel, 9);
|
|
|
|
Image catGaussian = ImageCopy(image);
|
|
|
|
for (int i = 0; i < 6; i++)
|
|
{
|
|
ImageKernelConvolution(&catGaussian, gaussiankernel, 9);
|
|
}
|
|
|
|
ImageCrop(&image, (Rectangle){ 0, 0, (float)200, (float)450 });
|
|
ImageCrop(&catGaussian, (Rectangle){ 0, 0, (float)200, (float)450 });
|
|
ImageCrop(&catSobel, (Rectangle){ 0, 0, (float)200, (float)450 });
|
|
ImageCrop(&catSharpend, (Rectangle){ 0, 0, (float)200, (float)450 });
|
|
|
|
// Images converted to texture, GPU memory (VRAM)
|
|
Texture2D texture = LoadTextureFromImage(image);
|
|
Texture2D catSharpendTexture = LoadTextureFromImage(catSharpend);
|
|
Texture2D catSobelTexture = LoadTextureFromImage(catSobel);
|
|
Texture2D catGaussianTexture = LoadTextureFromImage(catGaussian);
|
|
|
|
// Once images have been converted to texture and uploaded to VRAM,
|
|
// they can be unloaded from RAM
|
|
UnloadImage(image);
|
|
UnloadImage(catGaussian);
|
|
UnloadImage(catSobel);
|
|
UnloadImage(catSharpend);
|
|
|
|
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
|
|
//----------------------------------------------------------------------------------
|
|
// TODO: Update your variables here
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Draw
|
|
//----------------------------------------------------------------------------------
|
|
BeginDrawing();
|
|
|
|
ClearBackground(RAYWHITE);
|
|
|
|
DrawTexture(catSharpendTexture, 0, 0, WHITE);
|
|
DrawTexture(catSobelTexture, 200, 0, WHITE);
|
|
DrawTexture(catGaussianTexture, 400, 0, WHITE);
|
|
DrawTexture(texture, 600, 0, WHITE);
|
|
|
|
EndDrawing();
|
|
//----------------------------------------------------------------------------------
|
|
}
|
|
|
|
// De-Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
UnloadTexture(texture);
|
|
UnloadTexture(catGaussianTexture);
|
|
UnloadTexture(catSobelTexture);
|
|
UnloadTexture(catSharpendTexture);
|
|
|
|
CloseWindow(); // Close window and OpenGL context
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
return 0;
|
|
}
|