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Diffstat (limited to 'examples/textures_image_processing.c')
| -rw-r--r-- | examples/textures_image_processing.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/examples/textures_image_processing.c b/examples/textures_image_processing.c new file mode 100644 index 00000000..58b746e0 --- /dev/null +++ b/examples/textures_image_processing.c @@ -0,0 +1,154 @@ +/******************************************************************************************* +* +* 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() + +#define NUM_PROCESSES 8 + +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" +}; + +int main() +{ + // Initialization + //-------------------------------------------------------------------------------------- + int screenWidth = 800; + int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [textures] example - image processing"); + + // NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required) + + Image image = LoadImage("resources/parrots.png"); // Loaded in CPU memory (RAM) + ImageFormat(&image, UNCOMPRESSED_R8G8B8A8); // Format image to RGBA 32bit (required for texture update) + Texture2D texture = LoadTextureFromImage(image); // Image converted to texture, GPU memory (VRAM) + + int currentProcess = NONE; + bool textureReload = false; + + Rectangle selectRecs[NUM_PROCESSES]; + + for (int i = 0; i < NUM_PROCESSES; i++) selectRecs[i] = (Rectangle){ 40, 50 + 32*i, 150, 30 }; + + SetTargetFPS(60); + //--------------------------------------------------------------------------------------- + + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // 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(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + UnloadTexture(texture); // Unload texture from VRAM + UnloadImage(image); // Unload image from RAM + + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +}
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