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/*******************************************************************************************
*
* raylib [textures] example - Mouse painting
*
* Example originally created with raylib 3.0, last time updated with raylib 3.0
*
* Example contributed by Chris Dill (@MysteriousSpace) and reviewed by Ramon Santamaria (@raysan5)
*
* 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) 2019-2024 Chris Dill (@MysteriousSpace) and Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#define MAX_COLORS_COUNT 23 // Number of colors available
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [textures] example - mouse painting");
// Colors to choose from
Color colors[MAX_COLORS_COUNT] = {
RAYWHITE, YELLOW, GOLD, ORANGE, PINK, RED, MAROON, GREEN, LIME, DARKGREEN,
SKYBLUE, BLUE, DARKBLUE, PURPLE, VIOLET, DARKPURPLE, BEIGE, BROWN, DARKBROWN,
LIGHTGRAY, GRAY, DARKGRAY, BLACK };
// Define colorsRecs data (for every rectangle)
Rectangle colorsRecs[MAX_COLORS_COUNT] = { 0 };
for (int i = 0; i < MAX_COLORS_COUNT; i++)
{
colorsRecs[i].x = 10 + 30.0f*i + 2*i;
colorsRecs[i].y = 10;
colorsRecs[i].width = 30;
colorsRecs[i].height = 30;
}
int colorSelected = 0;
int colorSelectedPrev = colorSelected;
int colorMouseHover = 0;
float brushSize = 20.0f;
bool mouseWasPressed = false;
Rectangle btnSaveRec = { 750, 10, 40, 30 };
bool btnSaveMouseHover = false;
bool showSaveMessage = false;
int saveMessageCounter = 0;
// Create a RenderTexture2D to use as a canvas
RenderTexture2D target = LoadRenderTexture(screenWidth, screenHeight);
// Clear render texture before entering the game loop
BeginTextureMode(target);
ClearBackground(colors[0]);
EndTextureMode();
SetTargetFPS(120); // Set our game to run at 120 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
Vector2 mousePos = GetMousePosition();
// Move between colors with keys
if (IsKeyPressed(KEY_RIGHT)) colorSelected++;
else if (IsKeyPressed(KEY_LEFT)) colorSelected--;
if (colorSelected >= MAX_COLORS_COUNT) colorSelected = MAX_COLORS_COUNT - 1;
else if (colorSelected < 0) colorSelected = 0;
// Choose color with mouse
for (int i = 0; i < MAX_COLORS_COUNT; i++)
{
if (CheckCollisionPointRec(mousePos, colorsRecs[i]))
{
colorMouseHover = i;
break;
}
else colorMouseHover = -1;
}
if ((colorMouseHover >= 0) && IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
{
colorSelected = colorMouseHover;
colorSelectedPrev = colorSelected;
}
// Change brush size
brushSize += GetMouseWheelMove()*5;
if (brushSize < 2) brushSize = 2;
if (brushSize > 50) brushSize = 50;
if (IsKeyPressed(KEY_C))
{
// Clear render texture to clear color
BeginTextureMode(target);
ClearBackground(colors[0]);
EndTextureMode();
}
if (IsMouseButtonDown(MOUSE_BUTTON_LEFT) || (GetGestureDetected() == GESTURE_DRAG))
{
// Paint circle into render texture
// NOTE: To avoid discontinuous circles, we could store
// previous-next mouse points and just draw a line using brush size
BeginTextureMode(target);
if (mousePos.y > 50) DrawCircle((int)mousePos.x, (int)mousePos.y, brushSize, colors[colorSelected]);
EndTextureMode();
}
if (IsMouseButtonDown(MOUSE_BUTTON_RIGHT))
{
if (!mouseWasPressed)
{
colorSelectedPrev = colorSelected;
colorSelected = 0;
}
mouseWasPressed = true;
// Erase circle from render texture
BeginTextureMode(target);
if (mousePos.y > 50) DrawCircle((int)mousePos.x, (int)mousePos.y, brushSize, colors[0]);
EndTextureMode();
}
else if (IsMouseButtonReleased(MOUSE_BUTTON_RIGHT) && mouseWasPressed)
{
colorSelected = colorSelectedPrev;
mouseWasPressed = false;
}
// Check mouse hover save button
if (CheckCollisionPointRec(mousePos, btnSaveRec)) btnSaveMouseHover = true;
else btnSaveMouseHover = false;
// Image saving logic
// NOTE: Saving painted texture to a default named image
if ((btnSaveMouseHover && IsMouseButtonReleased(MOUSE_BUTTON_LEFT)) || IsKeyPressed(KEY_S))
{
Image image = LoadImageFromTexture(target.texture);
ImageFlipVertical(&image);
ExportImage(image, "my_amazing_texture_painting.png");
UnloadImage(image);
showSaveMessage = true;
}
if (showSaveMessage)
{
// On saving, show a full screen message for 2 seconds
saveMessageCounter++;
if (saveMessageCounter > 240)
{
showSaveMessage = false;
saveMessageCounter = 0;
}
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
// 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);
// Draw drawing circle for reference
if (mousePos.y > 50)
{
if (IsMouseButtonDown(MOUSE_BUTTON_RIGHT)) DrawCircleLines((int)mousePos.x, (int)mousePos.y, brushSize, GRAY);
else DrawCircle(GetMouseX(), GetMouseY(), brushSize, colors[colorSelected]);
}
// Draw top panel
DrawRectangle(0, 0, GetScreenWidth(), 50, RAYWHITE);
DrawLine(0, 50, GetScreenWidth(), 50, LIGHTGRAY);
// Draw color selection rectangles
for (int i = 0; i < MAX_COLORS_COUNT; i++) DrawRectangleRec(colorsRecs[i], colors[i]);
DrawRectangleLines(10, 10, 30, 30, LIGHTGRAY);
if (colorMouseHover >= 0) DrawRectangleRec(colorsRecs[colorMouseHover], Fade(WHITE, 0.6f));
DrawRectangleLinesEx((Rectangle){ colorsRecs[colorSelected].x - 2, colorsRecs[colorSelected].y - 2,
colorsRecs[colorSelected].width + 4, colorsRecs[colorSelected].height + 4 }, 2, BLACK);
// Draw save image button
DrawRectangleLinesEx(btnSaveRec, 2, btnSaveMouseHover ? RED : BLACK);
DrawText("SAVE!", 755, 20, 10, btnSaveMouseHover ? RED : BLACK);
// Draw save image message
if (showSaveMessage)
{
DrawRectangle(0, 0, GetScreenWidth(), GetScreenHeight(), Fade(RAYWHITE, 0.8f));
DrawRectangle(0, 150, GetScreenWidth(), 80, BLACK);
DrawText("IMAGE SAVED: my_amazing_texture_painting.png", 150, 180, 20, RAYWHITE);
}
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadRenderTexture(target); // Unload render texture
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
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