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121 lines
4.9 KiB
121 lines
4.9 KiB
/*******************************************************************************************
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*
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* raylib [shaders] example - ascii rendering
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*
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* Example complexity rating: [★★☆☆] 2/4
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*
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* Example originally created with raylib 5.5, last time updated with raylib 5.6
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*
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* Example contributed by Maicon Santana (@maiconpintoabreu) and reviewed by Ramon Santamaria (@raysan5)
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2025 Maicon Santana (@maiconpintoabreu)
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*
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********************************************************************************************/
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#include "raylib.h"
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#if defined(PLATFORM_DESKTOP)
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#define GLSL_VERSION 330
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#else // PLATFORM_ANDROID, PLATFORM_WEB
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#define GLSL_VERSION 100
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#endif
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//------------------------------------------------------------------------------------
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// Program main entry point
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//------------------------------------------------------------------------------------
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int main(void)
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [shaders] example - ascii rendering");
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// Texture to test static drawing
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Texture2D fudesumi = LoadTexture("resources/fudesumi.png");
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// Texture to test moving drawing
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Texture2D raysan = LoadTexture("resources/raysan.png");
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// Load shader to be used on postprocessing
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Shader shader = LoadShader(0, TextFormat("resources/shaders/glsl%i/ascii.fs", GLSL_VERSION));
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// These locations are used to send data to the GPU
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int resolutionLoc = GetShaderLocation(shader, "resolution");
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int fontSizeLoc = GetShaderLocation(shader, "fontSize");
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// Set the character size for the ASCII effect
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// Fontsize should be 9 or more
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float fontSize = 9.0f;
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// Send the updated values to the shader
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float resolution[2] = { (float)screenWidth, (float)screenHeight };
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SetShaderValue(shader, resolutionLoc, resolution, SHADER_UNIFORM_VEC2);
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Vector2 circlePos = (Vector2){40.0f, (float)screenHeight*0.5f};
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float circleSpeed = 1.0f;
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// RenderTexture to apply the postprocessing later
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RenderTexture2D target = LoadRenderTexture(screenWidth, screenHeight);
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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circlePos.x += circleSpeed;
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if ((circlePos.x > 200.0f) || (circlePos.x < 40.0f)) circleSpeed *= -1; // Revert speed
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if (IsKeyPressed(KEY_LEFT) && (fontSize > 9.0)) fontSize -= 1; // Reduce fontSize
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if (IsKeyPressed(KEY_RIGHT) && (fontSize < 15.0)) fontSize += 1; // Increase fontSize
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// Set fontsize for the shader
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SetShaderValue(shader, fontSizeLoc, &fontSize, SHADER_UNIFORM_FLOAT);
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// Draw
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//----------------------------------------------------------------------------------
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BeginTextureMode(target);
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ClearBackground(WHITE);
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// Draw scene in our render texture
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DrawTexture(fudesumi, 500, -30, WHITE);
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DrawTextureV(raysan, circlePos, WHITE);
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EndTextureMode();
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BeginDrawing();
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ClearBackground(RAYWHITE);
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BeginShaderMode(shader);
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// Draw the scene texture (that we rendered earlier) to the screen
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// The shader will process every pixel of this texture
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DrawTextureRec(target.texture,
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(Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height },
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(Vector2){ 0, 0 }, WHITE);
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EndShaderMode();
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DrawRectangle(0, 0, screenWidth, 40, BLACK);
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DrawText(TextFormat("Ascii effect - FontSize:%2.0f - [Left] -1 [Right] +1 ", fontSize), 120, 10, 20, LIGHTGRAY);
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DrawFPS(10, 10);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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UnloadRenderTexture(target); // Unload render texture
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UnloadShader(shader); // Unload shader
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UnloadTexture(fudesumi); // Unload texture
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UnloadTexture(raysan); // Unload texture
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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