diff options
Diffstat (limited to 'modules/libgrbase/g_clear.c')
| -rw-r--r-- | modules/libgrbase/g_clear.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/modules/libgrbase/g_clear.c b/modules/libgrbase/g_clear.c new file mode 100644 index 0000000..7bb0603 --- /dev/null +++ b/modules/libgrbase/g_clear.c @@ -0,0 +1,222 @@ +/* + * Copyright � 2006-2016 SplinterGU (Fenix/Bennugd) + * Copyright � 2002-2006 Fenix Team (Fenix) + * Copyright � 1999-2002 Jos� Luis Cebri�n Pag�e (Fenix) + * + * This file is part of Bennu - Game Development + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * + * 3. This notice may not be removed or altered from any source + * distribution. + * + */ + +/* --------------------------------------------------------------------------- */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "libgrbase.h" + +/* --------------------------------------------------------------------------- */ +/* + * FUNCTION : gr_clear + * + * Clear a bitmap (paint all pixels as 0 [transparent]) + * + * PARAMS : + * dest Bitmap to clear + * + * RETURN VALUE : + * None + * + */ + +void gr_clear( GRAPH * dest ) +{ + memset( dest->data, 0, dest->pitch * dest->height ) ; + + dest->modified = 1 ; /* Don't needs analysis */ + dest->info_flags &= ~GI_NOCOLORKEY; + dest->info_flags |= GI_CLEAN; +} + +/* --------------------------------------------------------------------------- */ +/* + * FUNCTION : gr_clear_as + * + * Clear a bitmap (paint all pixels as the given color) + * + * PARAMS : + * dest Bitmap to clear + * color 8 or 16-bit color value + * + * RETURN VALUE : + * None + * + */ + +void gr_clear_as( GRAPH * dest, int color ) +{ + uint32_t y; + + if ( !color ) + { + gr_clear( dest ); + return; + } + + switch ( dest->format->depth ) + { + case 8: + { + memset( dest->data, color, dest->pitch * dest->height ) ; + break; + } + + case 16: + { + uint8_t * data = dest->data ; + int16_t * ptr ; + int n ; + y = dest->height; + while ( y-- ) + { + ptr = ( int16_t * ) data; + n = dest->width; + while ( n-- ) * ptr++ = color ; + data += dest->pitch ; + } + break; + } + + case 32: + { + uint8_t * data = dest->data ; + uint32_t * ptr ; + int n ; + y = dest->height; + while ( y-- ) + { + ptr = ( uint32_t * ) data; + n = dest->width; + while ( n-- ) * ptr++ = color ; + data += dest->pitch ; + } + break; + } + + case 1: + { + int c = color ? 0xFF : 0 ; + memset( dest->data, c, dest->pitch * dest->height ) ; + break; + } + } + + dest->modified = 1 ; /* Don't needs analysis */ + if ( dest->format->depth != 32 || ( color & 0xff000000 ) == 0xff000000 ) + dest->info_flags |= GI_NOCOLORKEY; + else + dest->info_flags &= ~GI_NOCOLORKEY; + dest->info_flags &= ~GI_CLEAN; +} + +/* --------------------------------------------------------------------------- */ +/* + * FUNCTION : gr_clear_region + * + * Clear a region bitmap (paint all pixels as 0 [transparent]) + * + * PARAMS : + * dest Bitmap to clear + * region Region to clear or NULL for the whole screen + * + * RETURN VALUE : + * None + * + */ + +void gr_clear_region( GRAPH * dest, REGION * region ) +{ + REGION base_region ; + int y, l ; + + if ( !dest ) dest = scrbitmap ; + + if ( !region ) + { + region = &base_region ; + region->x = 0 ; + region->y = 0 ; + region->x2 = dest->width - 1 ; + region->y2 = dest->height - 1 ; + } + else + { + base_region = *region ; + region = &base_region ; + + region->x = MAX( MIN( region->x, region->x2 ), 0 ) ; + region->y = MAX( MIN( region->y, region->y2 ), 0 ) ; + region->x2 = MIN( MAX( region->x, region->x2 ), dest->width - 1 ) ; + region->y2 = MIN( MAX( region->y, region->y2 ), dest->height - 1 ) ; + } + + if ( region->x > dest->width || region->y > dest->height ) return; + if ( region->x2 < 0 || region->y2 < 0 ) return; + + switch ( dest->format->depth ) + { + case 8: + case 16: + case 32: + { + uint8_t * data = (( uint8_t * ) dest->data ) + dest->pitch * region->y + region->x * dest->format->depthb; + l = ( region->x2 - region->x + 1 ) * dest->format->depthb; + for ( y = region->y; y <= region->y2; y++ ) + { + memset( data, 0, l ); + data += dest->pitch ; + } + break ; + } + + case 1: + { + uint8_t * data = (( uint8_t * ) dest->data ) + region->x / 8 ; + l = ( region->x2 - region->x - 1 ) / 8 + 1 ; + for ( y = region->y; y <= region->y2; y++ ) + { + /* Esta debe ser cambiada, por bits */ + memset( data, 0, l ) ; + data += dest->pitch ; + } + break ; + } + + default: + return; + } + + dest->modified = 1 ; /* Don't needs analysis */ + dest->info_flags &= ~GI_NOCOLORKEY; +} + +/* --------------------------------------------------------------------------- */ |