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examples now using SDL_ALPHA_OPAQUE(_FLOAT) for opaque alpha value

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This commit is contained in:
Michael Palomas
2024-10-23 13:44:28 +02:00
committed by Sam Lantinga
parent 63ef5a2369
commit 21c91d5535
19 changed files with 38 additions and 38 deletions
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8
examples/renderer/03-lines/lines.c
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@@ -56,18 +56,18 @@ SDL_AppResult SDL_AppIterate(void *appstate)
};
/* as you can see from this, rendering draws over whatever was drawn before it. */
SDL_SetRenderDrawColor(renderer, 100, 100, 100, 255); /* grey, full alpha */
SDL_SetRenderDrawColor(renderer, 100, 100, 100, SDL_ALPHA_OPAQUE); /* grey, full alpha */
SDL_RenderClear(renderer); /* start with a blank canvas. */
/* You can draw lines, one at a time, like these brown ones... */
SDL_SetRenderDrawColor(renderer, 127, 49, 32, 255);
SDL_SetRenderDrawColor(renderer, 127, 49, 32, SDL_ALPHA_OPAQUE);
SDL_RenderLine(renderer, 240, 450, 400, 450);
SDL_RenderLine(renderer, 240, 356, 400, 356);
SDL_RenderLine(renderer, 240, 356, 240, 450);
SDL_RenderLine(renderer, 400, 356, 400, 450);
/* You can also draw a series of connected lines in a single batch... */
SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
SDL_SetRenderDrawColor(renderer, 0, 255, 0, SDL_ALPHA_OPAQUE);
SDL_RenderLines(renderer, line_points, SDL_arraysize(line_points));
/* here's a bunch of lines drawn out from a center point in a circle. */
@@ -76,7 +76,7 @@ SDL_AppResult SDL_AppIterate(void *appstate)
const float size = 30.0f;
const float x = 320.0f;
const float y = 95.0f - (size / 2.0f);
SDL_SetRenderDrawColor(renderer, SDL_rand(256), SDL_rand(256), SDL_rand(256), 255);
SDL_SetRenderDrawColor(renderer, SDL_rand(256), SDL_rand(256), SDL_rand(256), SDL_ALPHA_OPAQUE);
SDL_RenderLine(renderer, x, y, x + SDL_sinf((float) i) * size, y + SDL_cosf((float) i) * size);
}