diff options
Diffstat (limited to 'c_src/sdl_renderer.c')
-rw-r--r-- | c_src/sdl_renderer.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/c_src/sdl_renderer.c b/c_src/sdl_renderer.c new file mode 100644 index 0000000..ae65436 --- /dev/null +++ b/c_src/sdl_renderer.c @@ -0,0 +1,154 @@ +// Copyright (c) 2014, Loïc Hoguin <[email protected]> +// +// Permission to use, copy, modify, and/or distribute this software for any +// purpose with or without fee is hereby granted, provided that the above +// copyright notice and this permission notice appear in all copies. +// +// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + +#include "esdl2.h" + +void dtor_Renderer(ErlNifEnv* env, void* obj) +{ + SDL_DestroyRenderer(NIF_RES_GET(Renderer, obj)); +} + +#define RENDERER_FLAGS(F) \ + F(software, SDL_RENDERER_SOFTWARE) \ + F(accelerated, SDL_RENDERER_ACCELERATED) \ + F(present_vsync, SDL_RENDERER_PRESENTVSYNC) \ + F(target_texture, SDL_RENDERER_TARGETTEXTURE) + +NIF_LIST_TO_FLAGS_FUNCTION(list_to_renderer_flags, Uint32, RENDERER_FLAGS) + +int map_to_rect(ErlNifEnv* env, ERL_NIF_TERM map, SDL_Rect* rect) +{ + ERL_NIF_TERM x, y, w, h; + + if (!enif_get_map_value(env, map, atom_x, &x)) + return 0; + if (!enif_get_map_value(env, map, atom_y, &y)) + return 0; + if (!enif_get_map_value(env, map, atom_w, &w)) + return 0; + if (!enif_get_map_value(env, map, atom_h, &h)) + return 0; + + if (!enif_get_int(env, x, &rect->x)) + return 0; + if (!enif_get_int(env, y, &rect->y)) + return 0; + if (!enif_get_int(env, w, &rect->w)) + return 0; + if (!enif_get_int(env, h, &rect->h)) + return 0; + + return 1; +} + +NIF_FUNCTION(create_renderer) +{ + void* window_res; + int index; + Uint32 flags = 0; + SDL_Renderer* renderer; + ERL_NIF_TERM term; + + BADARG_IF(!enif_get_resource(env, argv[0], res_Window, &window_res)); + BADARG_IF(!enif_get_int(env, argv[1], &index)); + BADARG_IF(!list_to_renderer_flags(env, argv[2], &flags)); + + renderer = SDL_CreateRenderer(NIF_RES_GET(Window, window_res), index, flags); + if (!renderer) + return sdl_error_tuple(env); + + NIF_RES_TO_TERM(Renderer, renderer, term); + + return enif_make_tuple2(env, + atom_ok, + term + ); +} + +NIF_FUNCTION(render_clear) +{ + void* renderer_res; + + BADARG_IF(!enif_get_resource(env, argv[0], res_Renderer, &renderer_res)); + + if (SDL_RenderClear(NIF_RES_GET(Renderer, renderer_res))) + return sdl_error_tuple(env); + + return atom_ok; +} + +NIF_FUNCTION(render_copy) +{ + void* renderer_res; + void* texture_res; + SDL_Rect src, *srcPtr, dst, *dstPtr; + + BADARG_IF(!enif_get_resource(env, argv[0], res_Renderer, &renderer_res)); + BADARG_IF(!enif_get_resource(env, argv[1], res_Texture, &texture_res)); + + if (enif_is_identical(argv[2], atom_undefined)) + srcPtr = NULL; + else { + BADARG_IF(!enif_is_map(env, argv[2])); + + srcPtr = &src; + if (!map_to_rect(env, argv[2], srcPtr)) + return enif_make_badarg(env); + } + + if (enif_is_identical(argv[3], atom_undefined)) + dstPtr = NULL; + else { + BADARG_IF(!enif_is_map(env, argv[3])); + + dstPtr = &dst; + if (!map_to_rect(env, argv[3], dstPtr)) + return enif_make_badarg(env); + } + + if (SDL_RenderCopy(NIF_RES_GET(Renderer, renderer_res), NIF_RES_GET(Texture, texture_res), srcPtr, dstPtr)) + return sdl_error_tuple(env); + + return atom_ok; +} + +NIF_FUNCTION(render_present) +{ + void* renderer_res; + + BADARG_IF(!enif_get_resource(env, argv[0], res_Renderer, &renderer_res)); + + SDL_RenderPresent(NIF_RES_GET(Renderer, renderer_res)); + + return atom_ok; +} + +NIF_FUNCTION(set_render_draw_color) +{ + void* renderer_res; + int r, g, b, a; + + BADARG_IF(!enif_get_resource(env, argv[0], res_Renderer, &renderer_res)); + BADARG_IF(!enif_get_int(env, argv[1], &r)); + BADARG_IF(!enif_get_int(env, argv[2], &g)); + BADARG_IF(!enif_get_int(env, argv[3], &b)); + BADARG_IF(!enif_get_int(env, argv[4], &a)); + BADARG_IF(r < 0 || r > 255 || g < 0 || g > 255 + || b < 0 || b > 255 || a < 0 || a > 255); + + if (SDL_SetRenderDrawColor(NIF_RES_GET(Renderer, renderer_res), r, g, b ,a)) + return sdl_error_tuple(env); + + return atom_ok; +} |