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/*******************************************************************************************
*
* raylib [textures] example - Image processing
*
* NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
*
* This example has been created using raylib 1.4 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2016 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#include <stdlib.h> // Required for: free()
#if defined(PLATFORM_WEB)
#include <emscripten/emscripten.h>
#endif
#define NUM_PROCESSES 8
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;
typedef enum {
NONE = 0,
COLOR_GRAYSCALE,
COLOR_TINT,
COLOR_INVERT,
COLOR_CONTRAST,
COLOR_BRIGHTNESS,
FLIP_VERTICAL,
FLIP_HORIZONTAL
} ImageProcess;
static const char *processText[] = {
"NO PROCESSING",
"COLOR GRAYSCALE",
"COLOR TINT",
"COLOR INVERT",
"COLOR CONTRAST",
"COLOR BRIGHTNESS",
"FLIP VERTICAL",
"FLIP HORIZONTAL"
};
Image image;
Texture2D texture;
int currentProcess = NONE;
bool textureReload = false;
Rectangle selectRecs[NUM_PROCESSES];
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void); // Update and Draw one frame
//----------------------------------------------------------------------------------
// Main Enry Point
//----------------------------------------------------------------------------------
int main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [textures] example - image processing");
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
image = LoadImage("resources/parrots.png"); // Loaded in CPU memory (RAM)
ImageFormat(&image, UNCOMPRESSED_R8G8B8A8); // Format image to RGBA 32bit (required for texture update)
texture = LoadTextureFromImage(image); // Image converted to texture, GPU memory (VRAM)
for (int i = 0; i < NUM_PROCESSES; i++) selectRecs[i] = (Rectangle){ 40, 50 + 32*i, 150, 30 };
#if defined(PLATFORM_WEB)
emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
#else
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
UpdateDrawFrame();
}
#endif
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadTexture(texture); // Unload texture from VRAM
UnloadImage(image); // Unload image from RAM
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
// Update
//----------------------------------------------------------------------------------
if (IsKeyPressed(KEY_DOWN))
{
currentProcess++;
if (currentProcess > 7) currentProcess = 0;
textureReload = true;
}
else if (IsKeyPressed(KEY_UP))
{
currentProcess--;
if (currentProcess < 0) currentProcess = 7;
textureReload = true;
}
if (textureReload)
{
UnloadImage(image); // Unload current image data
image = LoadImage("resources/parrots.png"); // Re-load image data
// NOTE: Image processing is a costly CPU process to be done every frame,
// If image processing is required in a frame-basis, it should be done
// with a texture and by shaders
switch (currentProcess)
{
case COLOR_GRAYSCALE: ImageColorGrayscale(&image); break;
case COLOR_TINT: ImageColorTint(&image, GREEN); break;
case COLOR_INVERT: ImageColorInvert(&image); break;
case COLOR_CONTRAST: ImageColorContrast(&image, -40); break;
case COLOR_BRIGHTNESS: ImageColorBrightness(&image, -80); break;
case FLIP_VERTICAL: ImageFlipVertical(&image); break;
case FLIP_HORIZONTAL: ImageFlipHorizontal(&image); break;
default: break;
}
Color *pixels = GetImageData(image); // Get pixel data from image (RGBA 32bit)
UpdateTexture(texture, pixels); // Update texture with new image data
free(pixels); // Unload pixels data from RAM
textureReload = false;
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
DrawText("IMAGE PROCESSING:", 40, 30, 10, DARKGRAY);
// Draw rectangles
for (int i = 0; i < NUM_PROCESSES; i++)
{
if (i == currentProcess)
{
DrawRectangleRec(selectRecs[i], SKYBLUE);
DrawRectangleLines(selectRecs[i].x, selectRecs[i].y, selectRecs[i].width, selectRecs[i].height, BLUE);
DrawText(processText[i], selectRecs[i].x + selectRecs[i].width/2 - MeasureText(processText[i], 10)/2, selectRecs[i].y + 11, 10, DARKBLUE);
}
else
{
DrawRectangleRec(selectRecs[i], LIGHTGRAY);
DrawRectangleLines(selectRecs[i].x, selectRecs[i].y, selectRecs[i].width, selectRecs[i].height, GRAY);
DrawText(processText[i], selectRecs[i].x + selectRecs[i].width/2 - MeasureText(processText[i], 10)/2, selectRecs[i].y + 11, 10, DARKGRAY);
}
}
DrawTexture(texture, screenWidth - texture.width - 60, screenHeight/2 - texture.height/2, WHITE);
DrawRectangleLines(screenWidth - texture.width - 60, screenHeight/2 - texture.height/2, texture.width, texture.height, BLACK);
EndDrawing();
//----------------------------------------------------------------------------------
}
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