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commit e659d64782d1f5d6c93fc1547c81d941b5ea45bc Author: Cyril Hrubis metan@ucw.cz Date: Wed Feb 8 20:27:09 2012 +0100
tests: Add LineAA to linetest.
* The key 'a' now changes between anti aliased and normal lines.
diff --git a/tests/SDL/linetest.c b/tests/SDL/linetest.c index 1b01a3a..9e35f96 100644 --- a/tests/SDL/linetest.c +++ b/tests/SDL/linetest.c @@ -54,6 +54,8 @@ Uint32 timer_callback(__attribute__((unused)) Uint32 interval,
double start_angle = 0.0;
+static int aa_flag = 0; + void redraw_screen(void) { double angle; @@ -74,17 +76,18 @@ void redraw_screen(void) GP_Pixel pixel; pixel = GP_RGBToPixel(r, 0, b, context.pixel_type); - /* - * Draw the line forth and back to detect any pixel change - * between one direction and the other. - */ - GP_Line(&context, xcenter, ycenter, xcenter + x, ycenter + y, pixel); - GP_Line(&context, xcenter + x, ycenter + y, xcenter, ycenter, pixel); + if (aa_flag) { + GP_LineAA_Raw(&context, GP_FP_FROM_INT(xcenter), GP_FP_FROM_INT(ycenter), + GP_FP_FROM_INT(xcenter + x), GP_FP_FROM_INT(ycenter + y), pixel); + } else { + GP_Line(&context, xcenter + x, ycenter + y, xcenter, ycenter, pixel); + GP_Line(&context, xcenter, ycenter, xcenter + x, ycenter + y, pixel); + } }
/* axes */ - GP_HLineXYW(&context, 0, ycenter, display->w, white); - GP_VLineXYH(&context, xcenter, 0, display->h, white); +// GP_HLineXYW(&context, 0, ycenter, display->w, white); +// GP_VLineXYH(&context, xcenter, 0, display->h, white);
SDL_UnlockSurface(display); } @@ -95,17 +98,25 @@ void event_loop(void)
while (SDL_WaitEvent(&event) > 0) { switch (event.type) { - case SDL_USEREVENT: - redraw_screen(); - SDL_Flip(display); - start_angle += 0.01; - if (start_angle > 2*M_PI) { - start_angle = 0.0; - } + case SDL_USEREVENT: + redraw_screen(); + SDL_Flip(display); + start_angle += 0.01; + if (start_angle > 2*M_PI) { + start_angle = 0.0; + } + break; + case SDL_KEYDOWN: + switch (event.key.keysym.sym) { + case SDLK_a: + aa_flag = !aa_flag; break; - case SDL_KEYDOWN: - case SDL_QUIT: + default: return; + } + break; + case SDL_QUIT: + return; } } }
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Summary of changes: tests/SDL/linetest.c | 45 ++++++++++++++++++++++++++++----------------- 1 files changed, 28 insertions(+), 17 deletions(-)
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