src/render/software/SDL_drawline.h
author Ryan C. Gordon <icculus@icculus.org>
Sun, 09 Aug 2020 00:55:39 -0400
changeset 13981 26a147855bee
parent 13422 fd6a12de91c7
permissions -rw-r--r--
render: fixes to how we convert touch events for logical scaling.

We now handle HiDPI correctly, and touches are clamped to the viewport. So
if you are rendering to a logical 640x480 in a 720p window, and touch the
letterboxing at point (640,700), it will report the touch at (0.5,1.0) instead
of outside the documented range.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 #ifndef SDL_drawline_h_
    23 #define SDL_drawline_h_
    24 
    25 #include "../../SDL_internal.h"
    26 
    27 
    28 extern int SDL_DrawLine(SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color);
    29 extern int SDL_DrawLines(SDL_Surface * dst, const SDL_Point * points, int count, Uint32 color);
    30 
    31 #endif /* SDL_drawline_h_ */
    32 
    33 /* vi: set ts=4 sw=4 expandtab: */