diff options
Diffstat (limited to '3rdparty/SDL2/src/render/software/SDL_drawline.c')
-rw-r--r-- | 3rdparty/SDL2/src/render/software/SDL_drawline.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/3rdparty/SDL2/src/render/software/SDL_drawline.c b/3rdparty/SDL2/src/render/software/SDL_drawline.c deleted file mode 100644 index fd50ea748b0..00000000000 --- a/3rdparty/SDL2/src/render/software/SDL_drawline.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> - - 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 "../../SDL_internal.h" - -#if !SDL_RENDER_DISABLED - -#include "SDL_draw.h" -#include "SDL_drawline.h" -#include "SDL_drawpoint.h" - - -static void -SDL_DrawLine1(SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color, - SDL_bool draw_end) -{ - if (y1 == y2) { - int length; - int pitch = (dst->pitch / dst->format->BytesPerPixel); - Uint8 *pixel; - if (x1 <= x2) { - pixel = (Uint8 *)dst->pixels + y1 * pitch + x1; - length = draw_end ? (x2-x1+1) : (x2-x1); - } else { - pixel = (Uint8 *)dst->pixels + y1 * pitch + x2; - if (!draw_end) { - ++pixel; - } - length = draw_end ? (x1-x2+1) : (x1-x2); - } - SDL_memset(pixel, color, length); - } else if (x1 == x2) { - VLINE(Uint8, DRAW_FASTSETPIXEL1, draw_end); - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - DLINE(Uint8, DRAW_FASTSETPIXEL1, draw_end); - } else { - BLINE(x1, y1, x2, y2, DRAW_FASTSETPIXELXY1, draw_end); - } -} - -static void -SDL_DrawLine2(SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color, - SDL_bool draw_end) -{ - if (y1 == y2) { - HLINE(Uint16, DRAW_FASTSETPIXEL2, draw_end); - } else if (x1 == x2) { - VLINE(Uint16, DRAW_FASTSETPIXEL2, draw_end); - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - DLINE(Uint16, DRAW_FASTSETPIXEL2, draw_end); - } else { - Uint8 _r, _g, _b, _a; - const SDL_PixelFormat * fmt = dst->format; - SDL_GetRGBA(color, fmt, &_r, &_g, &_b, &_a); - if (fmt->Rmask == 0x7C00) { - AALINE(x1, y1, x2, y2, - DRAW_FASTSETPIXELXY2, DRAW_SETPIXELXY_BLEND_RGB555, - draw_end); - } else if (fmt->Rmask == 0xF800) { - AALINE(x1, y1, x2, y2, - DRAW_FASTSETPIXELXY2, DRAW_SETPIXELXY_BLEND_RGB565, - draw_end); - } else { - AALINE(x1, y1, x2, y2, - DRAW_FASTSETPIXELXY2, DRAW_SETPIXELXY2_BLEND_RGB, - draw_end); - } - } -} - -static void -SDL_DrawLine4(SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color, - SDL_bool draw_end) -{ - if (y1 == y2) { - HLINE(Uint32, DRAW_FASTSETPIXEL4, draw_end); - } else if (x1 == x2) { - VLINE(Uint32, DRAW_FASTSETPIXEL4, draw_end); - } else if (ABS(x1 - x2) == ABS(y1 - y2)) { - DLINE(Uint32, DRAW_FASTSETPIXEL4, draw_end); - } else { - Uint8 _r, _g, _b, _a; - const SDL_PixelFormat * fmt = dst->format; - SDL_GetRGBA(color, fmt, &_r, &_g, &_b, &_a); - if (fmt->Rmask == 0x00FF0000) { - if (!fmt->Amask) { - AALINE(x1, y1, x2, y2, - DRAW_FASTSETPIXELXY4, DRAW_SETPIXELXY_BLEND_RGB888, - draw_end); - } else { - AALINE(x1, y1, x2, y2, - DRAW_FASTSETPIXELXY4, DRAW_SETPIXELXY_BLEND_ARGB8888, - draw_end); - } - } else { - AALINE(x1, y1, x2, y2, - DRAW_FASTSETPIXELXY4, DRAW_SETPIXELXY4_BLEND_RGB, - draw_end); - } - } -} - -typedef void (*DrawLineFunc) (SDL_Surface * dst, - int x1, int y1, int x2, int y2, - Uint32 color, SDL_bool draw_end); - -static DrawLineFunc -SDL_CalculateDrawLineFunc(const SDL_PixelFormat * fmt) -{ - switch (fmt->BytesPerPixel) { - case 1: - if (fmt->BitsPerPixel < 8) { - break; - } - return SDL_DrawLine1; - case 2: - return SDL_DrawLine2; - case 4: - return SDL_DrawLine4; - } - return NULL; -} - -int -SDL_DrawLine(SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color) -{ - DrawLineFunc func; - - if (!dst) { - return SDL_SetError("SDL_DrawLine(): Passed NULL destination surface"); - } - - func = SDL_CalculateDrawLineFunc(dst->format); - if (!func) { - return SDL_SetError("SDL_DrawLine(): Unsupported surface format"); - } - - /* Perform clipping */ - /* FIXME: We don't actually want to clip, as it may change line slope */ - if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) { - return 0; - } - - func(dst, x1, y1, x2, y2, color, SDL_TRUE); - return 0; -} - -int -SDL_DrawLines(SDL_Surface * dst, const SDL_Point * points, int count, - Uint32 color) -{ - int i; - int x1, y1; - int x2, y2; - SDL_bool draw_end; - DrawLineFunc func; - - if (!dst) { - return SDL_SetError("SDL_DrawLines(): Passed NULL destination surface"); - } - - func = SDL_CalculateDrawLineFunc(dst->format); - if (!func) { - return SDL_SetError("SDL_DrawLines(): Unsupported surface format"); - } - - for (i = 1; i < count; ++i) { - x1 = points[i-1].x; - y1 = points[i-1].y; - x2 = points[i].x; - y2 = points[i].y; - - /* Perform clipping */ - /* FIXME: We don't actually want to clip, as it may change line slope */ - if (!SDL_IntersectRectAndLine(&dst->clip_rect, &x1, &y1, &x2, &y2)) { - continue; - } - - /* Draw the end if it was clipped */ - draw_end = (x2 != points[i].x || y2 != points[i].y); - - func(dst, x1, y1, x2, y2, color, draw_end); - } - if (points[0].x != points[count-1].x || points[0].y != points[count-1].y) { - SDL_DrawPoint(dst, points[count-1].x, points[count-1].y, color); - } - return 0; -} - -#endif /* !SDL_RENDER_DISABLED */ - -/* vi: set ts=4 sw=4 expandtab: */ |