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Add example

master
Causal Agent 4 weeks ago
parent
commit
6c49f0bd54
Signed by: Curtis McEnroe <june@causal.agency> GPG Key ID: CEA2F97ADCFCD77C
3 changed files with 109 additions and 2 deletions
  1. 2
    2
      Makefile
  2. 4
    0
      cards.3
  3. 103
    0
      example.c

+ 2
- 2
Makefile View File

@@ -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

+ 4
- 0
cards.3 View File

@@ -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

+ 103
- 0
example.c View File

@@ -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();
}

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