diff options
Diffstat (limited to 'examples/web/shaders/shaders_multi_sample2d.c')
| -rw-r--r-- | examples/web/shaders/shaders_multi_sample2d.c | 116 |
1 files changed, 81 insertions, 35 deletions
diff --git a/examples/web/shaders/shaders_multi_sample2d.c b/examples/web/shaders/shaders_multi_sample2d.c index 2e54598..4c21dc4 100644 --- a/examples/web/shaders/shaders_multi_sample2d.c +++ b/examples/web/shaders/shaders_multi_sample2d.c @@ -18,67 +18,72 @@ #include "raylib.h" +#if defined(PLATFORM_WEB) + #include <emscripten/emscripten.h> +#endif + #if defined(PLATFORM_DESKTOP) #define GLSL_VERSION 330 #else // PLATFORM_RPI, PLATFORM_ANDROID, PLATFORM_WEB #define GLSL_VERSION 100 #endif +//---------------------------------------------------------------------------------- +// Global Variables Definition +//---------------------------------------------------------------------------------- +const int screenWidth = 800; +const int screenHeight = 450; + +static Texture texRed = { 0 }; +static Texture texBlue = { 0 }; + +static Shader shader = { 0 }; +static int texBlueLoc = 0; +static int dividerLoc = 0; +static float dividerValue = 0.5f; + +//---------------------------------------------------------------------------------- +// Module Functions Declaration +//---------------------------------------------------------------------------------- +void UpdateDrawFrame(void); // Update and Draw one frame + +//---------------------------------------------------------------------------------- +// Program Main Entry Point +//---------------------------------------------------------------------------------- int main(void) { // Initialization //-------------------------------------------------------------------------------------- - const int screenWidth = 800; - const int screenHeight = 450; - InitWindow(screenWidth, screenHeight, "raylib - multiple sample2D"); Image imRed = GenImageColor(800, 450, (Color){ 255, 0, 0, 255 }); - Texture texRed = LoadTextureFromImage(imRed); + texRed = LoadTextureFromImage(imRed); UnloadImage(imRed); Image imBlue = GenImageColor(800, 450, (Color){ 0, 0, 255, 255 }); - Texture texBlue = LoadTextureFromImage(imBlue); + texBlue = LoadTextureFromImage(imBlue); UnloadImage(imBlue); - Shader shader = LoadShader(0, TextFormat("resources/shaders/glsl%i/color_mix.fs", GLSL_VERSION)); + shader = LoadShader(0, TextFormat("resources/shaders/glsl%i/color_mix.fs", GLSL_VERSION)); // Get an additional sampler2D location to be enabled on drawing - int texBlueLoc = GetShaderLocation(shader, "texture1"); + texBlueLoc = GetShaderLocation(shader, "texture1"); + + // Get shader uniform for divider + dividerLoc = GetShaderLocation(shader, "divider"); - SetTargetFPS(60); // Set our game to run at 60 frames-per-second +#if defined(PLATFORM_WEB) + emscripten_set_main_loop(UpdateDrawFrame, 60, 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 + while (!WindowShouldClose()) // Detect window close button or ESC key { - // Update - //---------------------------------------------------------------------------------- - // ... - //---------------------------------------------------------------------------------- - - // Draw - //---------------------------------------------------------------------------------- - BeginDrawing(); - - ClearBackground(RAYWHITE); - - BeginShaderMode(shader); - - // WARNING: Additional samplers are enabled for all draw calls in the batch, - // EndShaderMode() forces batch drawing and consequently resets active textures - // to let other sampler2D to be activated on consequent drawings (if required) - SetShaderValueTexture(shader, texBlueLoc, texBlue); - - // We are drawing texRed using default sampler2D texture0 but - // an additional texture units is enabled for texBlue (sampler2D texture1) - DrawTexture(texRed, 0, 0, WHITE); - - EndShaderMode(); - - EndDrawing(); - //---------------------------------------------------------------------------------- + UpdateDrawFrame(); } +#endif // De-Initialization //-------------------------------------------------------------------------------------- @@ -90,4 +95,45 @@ int main(void) //-------------------------------------------------------------------------------------- return 0; +} + +//---------------------------------------------------------------------------------- +// Module Functions Definitions +//---------------------------------------------------------------------------------- +void UpdateDrawFrame(void) +{ + // Update + //---------------------------------------------------------------------------------- + if (IsKeyDown(KEY_RIGHT)) dividerValue += 0.01f; + else if (IsKeyDown(KEY_LEFT)) dividerValue -= 0.01f; + + if (dividerValue < 0.0f) dividerValue = 0.0f; + else if (dividerValue > 1.0f) dividerValue = 1.0f; + + SetShaderValue(shader, dividerLoc, ÷rValue, SHADER_UNIFORM_FLOAT); + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + BeginShaderMode(shader); + + // WARNING: Additional samplers are enabled for all draw calls in the batch, + // EndShaderMode() forces batch drawing and consequently resets active textures + // to let other sampler2D to be activated on consequent drawings (if required) + SetShaderValueTexture(shader, texBlueLoc, texBlue); + + // We are drawing texRed using default sampler2D texture0 but + // an additional texture units is enabled for texBlue (sampler2D texture1) + DrawTexture(texRed, 0, 0, WHITE); + + EndShaderMode(); + + DrawText("Use KEY_LEFT/KEY_RIGHT to move texture mixing in shader!", 80, GetScreenHeight() - 40, 20, RAYWHITE); + + EndDrawing(); + //---------------------------------------------------------------------------------- }
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