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authorC. McEnroe <june@causal.agency>2019-08-22 19:46:13 -0400
committerC. McEnroe <june@causal.agency>2019-08-22 19:46:13 -0400
commit6c49f0bd549c3b6db2b047e5e7e19f0d26cff9f4 (patch)
tree5ea502d5297e9198642c96512f8d20b36b445b5b
parentAdd FILES section (diff)
downloadcards-6c49f0bd549c3b6db2b047e5e7e19f0d26cff9f4.tar.gz
cards-6c49f0bd549c3b6db2b047e5e7e19f0d26cff9f4.zip
Add example
-rw-r--r--Makefile4
-rw-r--r--cards.34
-rw-r--r--example.c103
3 files changed, 109 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 8990dd0..488245d 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ CFLAGS += -std=c99 -Wall -Wextra -Wpedantic
include config.mk
-BINS = dump
+BINS = dump example
all: ${BINS}
@@ -11,7 +11,7 @@ ${BINS}: cards.o
.o:
${CC} ${LDFLAGS} $< cards.o ${LDLIBS} -o $@
-cards.o dump.o: cards.h
+cards.o dump.o example.o: cards.h
clean:
rm -f ${BINS} *.o *.bmp
diff --git a/cards.3 b/cards.3
index b4dd61d..26c142c 100644
--- a/cards.3
+++ b/cards.3
@@ -183,6 +183,10 @@ of the files
and
.Pa SOL.EXE .
.
+.Sh EXAMPLES
+See
+.Pa example.c .
+.
.Sh ERRORS
Error messages are set with
.Fn SDL_SetError
diff --git a/example.c b/example.c
new file mode 100644
index 0000000..8790d65
--- /dev/null
+++ b/example.c
@@ -0,0 +1,103 @@
+/* Copyright (C) 2019 C. McEnroe <june@causal.agency>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <SDL.h>
+
+#include "cards.h"
+
+static void err(const char *title) {
+ int error = SDL_ShowSimpleMessageBox(
+ SDL_MESSAGEBOX_ERROR, title, SDL_GetError(), NULL
+ );
+ if (error) fprintf(stderr, "%s\n", SDL_GetError());
+ SDL_Quit();
+ exit(EXIT_FAILURE);
+}
+
+enum {
+ MarginX = 11,
+ MarginY = 6,
+ DeltaX = 14,
+ DeltaY = 6 + Cards_CardHeight,
+ WindowWidth = MarginX + 12 * DeltaX + Cards_CardWidth + MarginX,
+ WindowHeight = MarginY + 4 * DeltaY,
+};
+
+int main(void) {
+ if (SDL_Init(SDL_INIT_VIDEO) < 0) err("SDL_Init");
+
+ struct SDL_RWops *rw = SDL_RWFromFile("CARDS.DLL", "rb");
+ if (!rw) err("SDL_RWFromFile");
+
+ SDL_Surface *surfaces[Cards_CardCount];
+ int error = Cards_LoadCards(
+ surfaces, Cards_CardCount,
+ rw, Cards_ColorKey | Cards_AlphaCorners | Cards_BlackBorders
+ );
+ if (error) err("Cards_LoadCards");
+ SDL_RWclose(rw);
+
+ SDL_Window *window;
+ SDL_Renderer *render;
+ error = SDL_CreateWindowAndRenderer(
+ WindowWidth, WindowHeight, SDL_WINDOW_ALLOW_HIGHDPI,
+ &window, &render
+ );
+ if (error) err("SDL_CreateWindowAndRenderer");
+ SDL_SetWindowTitle(window, "Cards Example");
+
+ SDL_RenderSetIntegerScale(render, SDL_TRUE);
+ SDL_RenderSetLogicalSize(render, WindowWidth, WindowHeight);
+
+ SDL_Texture *textures[Cards_CardCount];
+ for (int i = 0; i < Cards_CardCount; ++i) {
+ textures[i] = NULL;
+ if (!surfaces[i]) continue;
+ textures[i] = SDL_CreateTextureFromSurface(render, surfaces[i]);
+ if (!textures[i]) err("SDL_CreateTextureFromSurface");
+ SDL_FreeSurface(surfaces[i]);
+ }
+
+ SDL_Rect rects[Cards_CardCount] = {0};
+ for (int i = 1; i <= 52; ++i) {
+ rects[i].x = MarginX + (i - 1) % 13 * DeltaX;
+ rects[i].y = MarginY + (i - 1) / 13 * DeltaY;
+ rects[i].w = Cards_CardWidth;
+ rects[i].h = Cards_CardHeight;
+ }
+
+ for (;;) {
+ SDL_SetRenderDrawColor(render, 0x00, 0xAA, 0x55, 0xFF);
+ SDL_RenderClear(render);
+ for (int i = 0; i < Cards_CardCount; ++i) {
+ if (!rects[i].w) continue;
+ SDL_RenderCopy(render, textures[i], NULL, &rects[i]);
+ }
+ SDL_RenderPresent(render);
+
+ SDL_Event event;
+ for (;;) {
+ SDL_WaitEvent(&event);
+ if (event.type == SDL_QUIT) goto quit;
+ }
+ }
+
+quit:
+ SDL_Quit();
+}