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#define KTX_OPENGL 1
#include <ktx.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <dirent.h>
#include <waffle-1/waffle.h>
GLint
_mesa_components_in_format(GLenum format)
{
switch (format) {
case GL_RGB:
case GL_BGR:
return 3;
case GL_RGBA:
case GL_BGRA:
return 4;
default:
return -1;
}
}
GLint
_mesa_bytes_per_pixel(GLenum format, GLenum type)
{
GLint comps = _mesa_components_in_format(format);
if (comps < 0)
return -1;
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
return comps * sizeof(GLubyte);
case GL_SHORT:
case GL_UNSIGNED_SHORT:
return comps * sizeof(GLshort);
case GL_INT:
case GL_UNSIGNED_INT:
return comps * sizeof(GLint);
case GL_FLOAT:
return comps * sizeof(GLfloat);
case GL_HALF_FLOAT:
return comps * sizeof(GLhalf);
default:
return -1;
}
}
int
no_dot_output_filter (const struct dirent * dir_entity)
{
return strlen(dir_entity->d_name) > 2 &&
strstr(dir_entity->d_name, "waffles.ktx") == NULL &&
strstr(dir_entity->d_name, "swp") == NULL;
}
void make_context()
{
/* Generate a context */
struct waffle_display *dpy;
struct waffle_config *config;
struct waffle_window *window;
struct waffle_context *ctx;
const int32_t init_attrs[] = {
WAFFLE_PLATFORM, WAFFLE_PLATFORM_X11_EGL,
0,
};
const int32_t config_attrs[] = {
WAFFLE_CONTEXT_API, WAFFLE_CONTEXT_OPENGL_ES2,
WAFFLE_RED_SIZE, 8,
WAFFLE_BLUE_SIZE, 8,
WAFFLE_GREEN_SIZE, 8,
0,
};
const int32_t window_width = 320;
const int32_t window_height = 240;
waffle_init(init_attrs);
dpy = waffle_display_connect(NULL);
// Exit if OpenGL ES2 is unsupported.
if (!waffle_display_supports_context_api(dpy, WAFFLE_CONTEXT_OPENGL_ES2)
|| !waffle_dl_can_open(WAFFLE_DL_OPENGL_ES2))
{
exit(EXIT_FAILURE);
}
config = waffle_config_choose(dpy, config_attrs);
window = waffle_window_create(config, window_width, window_height);
ctx = waffle_context_create(config, NULL);
waffle_make_current(dpy, window, ctx);
}
/* Accepts the mipmap dir, the output filename */
int
main(int argc, char *argv[])
{
/* Get arguments */
char * output_dir = argv[1];
char * filename = argv[2];
/* Create GLES2 context */
make_context();
/* List directories (adapted from scandir manpage) */
struct dirent **namelist;
int levels = scandir(output_dir, &namelist, no_dot_output_filter, alphasort);
if (levels < 0)
perror("scandir");
/* Structs used to write the final output */
KTX_texture_info tex_info;
KTX_image_info *img_info = (KTX_image_info*)malloc(levels * sizeof(KTX_image_info));
int cur_lev;
char cur_path[4096];
for (cur_lev = 0; cur_lev < levels; ++cur_lev) {
/* Create full file path */
char * cur_file = namelist[cur_lev]->d_name;
strcpy(cur_path, output_dir);
strcat(cur_path, cur_file);
//printf("%s\n", cur_path);
/* Read in the file from memory */
FILE* file = fopen(cur_path, "rb");
if (file == NULL)
printf("File not opened\n");
/* Skip the identifier and endianness */
int error = fseek(file, 16, SEEK_SET);
if (error)
printf("File seek bad\n");
/* Read the appropriate header bits */
KTX_texture_info ltex_info;
size_t size_read = fread(<ex_info, 1, sizeof(ltex_info), file);
if (size_read < sizeof(ltex_info))
printf("bad read 1\n");
/* Fill out final struct */
if (cur_lev == 0) {
memcpy(&tex_info, <ex_info, sizeof(ltex_info));
/* Update the mipmap section */
tex_info.numberOfMipmapLevels = levels;
}
/* Skip the bytes of Key Value Data */
error = fseek(file, 4, SEEK_CUR);
if (error)
printf("File seek bad\n");
/* Get the image size */
GLsizei *lsize = &img_info[cur_lev].size;
GLubyte **ldata = &img_info[cur_lev].data;
size_read = fread(lsize, 1, 4, file);
if (size_read < 4)
printf("bad read 2\n");
/* Get the image data */
*ldata = (GLubyte*) malloc(*lsize);
size_read = fread(*ldata, 1, *lsize, file);
if (size_read < *lsize)
printf("bad read 2\n");
/* Convert miplevel to the original image's format */
if (tex_info.glFormat != ltex_info.glFormat) {
printf("MIPLEVEL %d: Different glFormat!\ncomps: %d vs %d\n", cur_lev,
_mesa_components_in_format(tex_info.glFormat),
_mesa_components_in_format(ltex_info.glFormat));
/* Conversion step */
GLsizei lsize2 = ltex_info.pixelHeight * ltex_info.pixelWidth * _mesa_bytes_per_pixel(tex_info.glFormat, tex_info.glType) ;
GLubyte *ldata2 = (GLubyte*) malloc(lsize2);
if (ldata2 == NULL)
puts("malloc failed");
int offset = 0;
int offset2 = 0;
while (offset < *lsize) {
memcpy(ldata2 + offset2, *ldata+offset, 3);
ldata2[offset2+3] = 255;
offset+=3;
offset2+=4;
}
/* Saving step */
free(*ldata);
*lsize = lsize2;
*ldata = ldata2;
}
free(namelist[cur_lev]);
/* Close the file */
if (file != NULL)
fclose(file);
}
/* Write memory object to file */
KTX_error_code kec;
strcpy(cur_path, output_dir);
strcat(cur_path, filename);
kec = ktxWriteKTXN(cur_path, &tex_info, 0, NULL, levels, img_info);
printf("%s - %s\n", cur_path, ktxErrorString(kec));
/* Cleanup */
free(namelist);
for (cur_lev = 0; cur_lev < levels; ++cur_lev)
free(img_info[cur_lev].data);
free(img_info);
return 0;
}
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