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test: Add some common code to load test resources

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As well as reducing duplication, this lets the tests load their resources
from the SDL_GetBasePath() on platforms that support it, which is useful
if the tests are compiled along with the rest of SDL and installed below
/usr as manual tests, similar to GNOME's installed-tests convention.

Thanks to Ozkan Sezer for the OS/2 build glue.

Co-authored-by: Ozkan Sezer <sezeroz@gmail.com>
Signed-off-by: Simon McVittie <smcv@collabora.com>
This commit is contained in:
Simon McVittie 2022-04-12 13:07:18 +01:00 • committed by Sam Lantinga
parent ecf1e15fec
commit 76a7b629bf
31 changed files with 344 additions and 508 deletions
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149
test/testutils.c Normal file
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/*
Copyright 1997-2022 Sam Lantinga
Copyright 2022 Collabora Ltd.
SPDX-License-Identifier: Zlib
*/
#include "testutils.h"
#if defined(SDL_FILESYSTEM_OS2) || defined(SDL_FILESYSTEM_WINDOWS)
static const char pathsep[] = "\\";
#elif defined(SDL_FILESYSTEM_RISCOS)
static const char pathsep[] = ".";
#else
static const char pathsep[] = "/";
#endif
/*
* Return the absolute path to def in the SDL_GetBasePath() if possible, or
* the relative path to def on platforms that don't have a working
* SDL_GetBasePath(). Free the result with SDL_free.
*
* Fails and returns NULL if out of memory.
*/
char *
GetNearbyFilename(const char *file)
{
char *base;
char *path;
base = SDL_GetBasePath();
if (base != NULL) {
size_t len = SDL_strlen(base) + SDL_strlen(pathsep) + SDL_strlen(file) + 1;
path = SDL_malloc(len);
if (path == NULL) {
SDL_OutOfMemory();
return NULL;
}
SDL_snprintf(path, len, "%s%s%s", base, pathsep, file);
}
if (base) {
SDL_free(base);
}
return path;
}
/*
* If user_specified is non-NULL, return a copy of it. Free with SDL_free.
*
* Otherwise, return the absolute path to def in the SDL_GetBasePath() if
* possible, or the relative path to def on platforms that don't have a
* working SDL_GetBasePath(). Free the result with SDL_free.
*
* Fails and returns NULL if out of memory.
*/
char *
GetResourceFilename(const char *user_specified, const char *def)
{
if (user_specified != NULL) {
char *ret = SDL_strdup(user_specified);
if (ret == NULL) {
SDL_OutOfMemory();
}
return ret;
} else {
return GetNearbyFilename(def);
}
}
/*
* Load the .bmp file whose name is file, from the SDL_GetBasePath() if
* possible or the current working directory if not.
*
* If transparent is true, set the transparent colour from the top left pixel.
*
* If width_out is non-NULL, set it to the texture width.
*
* If height_out is non-NULL, set it to the texture height.
*/
SDL_Texture *
LoadTexture(SDL_Renderer *renderer, const char *file, SDL_bool transparent,
int *width_out, int *height_out)
{
SDL_Surface *temp = NULL;
SDL_Texture *texture = NULL;
char *path;
path = GetNearbyFilename(file);
if (path != NULL) {
file = path;
}
temp = SDL_LoadBMP(file);
if (temp == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError());
} else {
/* Set transparent pixel as the pixel at (0,0) */
if (transparent) {
if (temp->format->palette) {
SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *)temp->pixels);
} else {
switch (temp->format->BitsPerPixel) {
case 15:
SDL_SetColorKey(temp, SDL_TRUE,
(*(Uint16 *) temp->pixels) & 0x00007FFF);
break;
case 16:
SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels);
break;
case 24:
SDL_SetColorKey(temp, SDL_TRUE,
(*(Uint32 *) temp->pixels) & 0x00FFFFFF);
break;
case 32:
SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels);
break;
}
}
}
if (width_out != NULL) {
*width_out = temp->w;
}
if (height_out != NULL) {
*height_out = temp->h;
}
texture = SDL_CreateTextureFromSurface(renderer, temp);
if (!texture) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
}
}
if (temp) {
SDL_FreeSurface(temp);
}
if (path) {
SDL_free(path);
}
return texture;
}