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Diffstat (limited to 'docs/examples/web/textures/textures_to_image.c')
| -rw-r--r-- | docs/examples/web/textures/textures_to_image.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/docs/examples/web/textures/textures_to_image.c b/docs/examples/web/textures/textures_to_image.c new file mode 100644 index 00000000..df7b4584 --- /dev/null +++ b/docs/examples/web/textures/textures_to_image.c @@ -0,0 +1,101 @@ +/******************************************************************************************* +* +* raylib [core] example - Retrieve image data from texture: GetTextureData() (adapted for HTML5 platform) +* +* NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM) +* +* This example has been created using raylib 1.3 (www.raylib.com) +* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details) +* +* Copyright (c) 2015 Ramon Santamaria (@raysan5) +* +********************************************************************************************/ + +#include "raylib.h" + +#if defined(PLATFORM_WEB) + #include <emscripten/emscripten.h> +#endif + +//---------------------------------------------------------------------------------- +// Global Variables Definition +//---------------------------------------------------------------------------------- +int screenWidth = 800; +int screenHeight = 450; + +// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required) + +Image image; +Texture2D texture; + + +//---------------------------------------------------------------------------------- +// Module Functions Declaration +//---------------------------------------------------------------------------------- +void UpdateDrawFrame(void); // Update and Draw one frame + +//---------------------------------------------------------------------------------- +// Main Enry Point +//---------------------------------------------------------------------------------- +int main() +{ + // Initialization + //-------------------------------------------------------------------------------------- + InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture to image"); + + image = LoadImage("resources/raylib_logo.png"); // Load image data into CPU memory (RAM) + texture = LoadTextureFromImage(image); // Image converted to texture, GPU memory (RAM -> VRAM) + UnloadImage(image); // Unload image data from CPU memory (RAM) + + image = GetTextureData(texture); // Retrieve image data from GPU memory (VRAM -> RAM) + UnloadTexture(texture); // Unload texture from GPU memory (VRAM) + + texture = LoadTextureFromImage(image); // Recreate texture from retrieved image data (RAM -> VRAM) + UnloadImage(image); // Unload retrieved image data from CPU memory (RAM) + +#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); // Texture unloading + + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +} + +//---------------------------------------------------------------------------------- +// Module Functions Definition +//---------------------------------------------------------------------------------- +void UpdateDrawFrame(void) +{ + // Update + //---------------------------------------------------------------------------------- + // TODO: Update your variables here + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + DrawTexture(texture, screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2, WHITE); + + DrawText("this IS a texture loaded from an image!", 300, 370, 10, GRAY); + + EndDrawing(); + //---------------------------------------------------------------------------------- +}
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