Built SDL2_image and _mixer static

libsdl2_image/IMG_xv.c

@@ -0,0 +1,162 @@
+/*
+  SDL_image:  An example image loading library for use with SDL
+  Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* This is a XV thumbnail image file loading framework */
+
+#include "SDL_image.h"
+
+#ifdef LOAD_XV
+
+static int get_line(SDL_RWops *src, char *line, int size)
+{
+    while ( size > 0 ) {
+        if ( SDL_RWread(src, line, 1, 1) <= 0 ) {
+            return -1;
+        }
+        if ( *line == '\r' ) {
+            continue;
+        }
+        if ( *line == '\n' ) {
+            *line = '\0';
+            return 0;
+        }
+        ++line;
+        --size;
+    }
+    /* Out of space for the line */
+    return -1;
+}
+
+static int get_header(SDL_RWops *src, int *w, int *h)
+{
+    char line[1024];
+
+    *w = 0;
+    *h = 0;
+
+    /* Check the header magic */
+    if ( (get_line(src, line, sizeof(line)) < 0) ||
+         (SDL_memcmp(line, "P7 332", 6) != 0) ) {
+        return -1;
+    }
+
+    /* Read the header */
+    while ( get_line(src, line, sizeof(line)) == 0 ) {
+        if ( SDL_memcmp(line, "#BUILTIN:", 9) == 0 ) {
+            /* Builtin image, no data */
+            break;
+        }
+        if ( SDL_memcmp(line, "#END_OF_COMMENTS", 16) == 0 ) {
+            if ( get_line(src, line, sizeof(line)) == 0 ) {
+                SDL_sscanf(line, "%d %d", w, h);
+                if ( *w >= 0 && *h >= 0 ) {
+                    return 0;
+                }
+            }
+            break;
+        }
+    }
+    /* No image data */
+    return -1;
+}
+
+/* See if an image is contained in a data source */
+int IMG_isXV(SDL_RWops *src)
+{
+    Sint64 start;
+    int is_XV;
+    int w, h;
+
+    if ( !src )
+        return 0;
+    start = SDL_RWtell(src);
+    is_XV = 0;
+    if ( get_header(src, &w, &h) == 0 ) {
+        is_XV = 1;
+    }
+    SDL_RWseek(src, start, RW_SEEK_SET);
+    return(is_XV);
+}
+
+/* Load a XV thumbnail image from an SDL datasource */
+SDL_Surface *IMG_LoadXV_RW(SDL_RWops *src)
+{
+    Sint64 start;
+    const char *error = NULL;
+    SDL_Surface *surface = NULL;
+    int w, h;
+    Uint8 *pixels;
+
+    if ( !src ) {
+        /* The error message has been set in SDL_RWFromFile */
+        return NULL;
+    }
+    start = SDL_RWtell(src);
+
+    /* Read the header */
+    if ( get_header(src, &w, &h) < 0 ) {
+        error = "Unsupported image format";
+        goto done;
+    }
+
+    /* Create the 3-3-2 indexed palette surface */
+    surface = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 8, 0xe0, 0x1c, 0x03, 0);
+    if ( surface == NULL ) {
+        error = "Out of memory";
+        goto done;
+    }
+
+    /* Load the image data */
+    for ( pixels = (Uint8 *)surface->pixels; h > 0; --h ) {
+        if ( SDL_RWread(src, pixels, w, 1) <= 0 ) {
+            error = "Couldn't read image data";
+            goto done;
+        }
+        pixels += surface->pitch;
+    }
+
+done:
+    if ( error ) {
+        SDL_RWseek(src, start, RW_SEEK_SET);
+        if ( surface ) {
+            SDL_FreeSurface(surface);
+            surface = NULL;
+        }
+        IMG_SetError("%s", error);
+    }
+    return surface;
+}
+
+#else
+
+/* See if an image is contained in a data source */
+int IMG_isXV(SDL_RWops *src)
+{
+    return(0);
+}
+
+/* Load a XXX type image from an SDL datasource */
+SDL_Surface *IMG_LoadXV_RW(SDL_RWops *src)
+{
+    return(NULL);
+}
+
+#endif /* LOAD_XV */