/** Dato il path, carica la texture e restituisce l'id */
unsigned GlCanvas::loadTexture(char *path)
{
/* Carica l'immagine png in memoria, usando la libreria pnglite */
png_t png;
unsigned int id;
png_init(malloc, free);
if(png_open_file_read(&png, path) != PNG_NO_ERROR)
return 0;
unsigned char *data = (unsigned char *) malloc(png.width * png.height * png.bpp);
png_get_data(&png, (unsigned char *) data);
/* Crea la texture in opengl */
glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_2D, id);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, png.bpp, png.width, png.height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
/* Libera la risorsa png */
png_close_file(&png);
free(data);
/* Restituisce l'id della texture */
return id;
}
int LoadPNG(CImageInfo *pImg, const char *pFilename)
{
unsigned char *pBuffer;
png_t Png;
int Error = png_open_file(&Png, pFilename);
if(Error != PNG_NO_ERROR)
{
dbg_msg("map_replace_image", "failed to open image file. filename='%s'", pFilename);
if(Error != PNG_FILE_ERROR)
png_close_file(&Png);
return 0;
}
if(Png.depth != 8 || (Png.color_type != PNG_TRUECOLOR && Png.color_type != PNG_TRUECOLOR_ALPHA) || Png.width > (2<<12) || Png.height > (2<<12))
{
dbg_msg("map_replace_image", "invalid image format. filename='%s'", pFilename);
png_close_file(&Png);
return 0;
}
pBuffer = (unsigned char *)malloc(Png.width * Png.height * Png.bpp);
png_get_data(&Png, pBuffer);
png_close_file(&Png);
pImg->m_Width = Png.width;
pImg->m_Height = Png.height;
if(Png.color_type == PNG_TRUECOLOR)
pImg->m_Format = CImageInfo::FORMAT_RGB;
else if(Png.color_type == PNG_TRUECOLOR_ALPHA)
pImg->m_Format = CImageInfo::FORMAT_RGBA;
pImg->m_pData = pBuffer;
return 1;
}
int FixFile(const char *pFileName)
{
png_t Png;
CPixel *pBuffer[2] = {0,0};
png_init(0, 0);
png_open_file(&Png, pFileName);
if(Png.color_type != PNG_TRUECOLOR_ALPHA)
{
dbg_msg("tileset_borderadd", "%s: not an RGBA image", pFileName);
return 1;
}
int w = Png.width;
int h = Png.height;
pBuffer[0] = (CPixel*)mem_alloc(w*h*sizeof(CPixel), 1);
pBuffer[1] = (CPixel*)mem_alloc((w+16*4)*(h+16*4)*sizeof(CPixel), 1);
png_get_data(&Png, (unsigned char *)pBuffer[0]);
png_close_file(&Png);
TilesetBorderadd(w, h, pBuffer[0], pBuffer[1]);
// save here
png_open_file_write(&Png, pFileName);
png_set_data(&Png, w + 16 * 4, h + 16 * 4, 8, PNG_TRUECOLOR_ALPHA, (unsigned char *)pBuffer[1]);
png_close_file(&Png);
return 0;
}
int CModAPI_ModCreator::AddImage(IStorage* pStorage, const char* pFilename)
{
CModAPI_ModItem_Image Image;
char aCompleteFilename[512];
unsigned char *pBuffer;
png_t Png; // ignore_convention
// open file for reading
png_init(0,0); // ignore_convention
IOHANDLE File = pStorage->OpenFile(pFilename, IOFLAG_READ, IStorage::TYPE_ALL, aCompleteFilename, sizeof(aCompleteFilename));
if(File)
{
io_close(File);
}
else
{
dbg_msg("mod", "failed to open file. filename='%s'", pFilename);
return -1;
}
int Error = png_open_file(&Png, aCompleteFilename); // ignore_convention
if(Error != PNG_NO_ERROR)
{
dbg_msg("mod", "failed to open file. filename='%s'", aCompleteFilename);
if(Error != PNG_FILE_ERROR)
{
png_close_file(&Png); // ignore_convention
}
return -1;
}
if(Png.depth != 8 || (Png.color_type != PNG_TRUECOLOR && Png.color_type != PNG_TRUECOLOR_ALPHA) || Png.width > (2<<12) || Png.height > (2<<12)) // ignore_convention
{
dbg_msg("mod", "invalid format. filename='%s'", aCompleteFilename);
png_close_file(&Png); // ignore_convention
return -1;
}
pBuffer = (unsigned char *)mem_alloc(Png.width * Png.height * Png.bpp, 1); // ignore_convention
png_get_data(&Png, pBuffer); // ignore_convention
png_close_file(&Png); // ignore_convention
Image.m_Id = m_Images.size();
Image.m_Width = Png.width; // ignore_convention
Image.m_Height = Png.height; // ignore_convention
if(Png.color_type == PNG_TRUECOLOR) // ignore_convention
Image.m_Format = CImageInfo::FORMAT_RGB;
else if(Png.color_type == PNG_TRUECOLOR_ALPHA) // ignore_convention
Image.m_Format = CImageInfo::FORMAT_RGBA;
m_Images.add(Image);
m_ImagesData.add(pBuffer);
return Image.m_Id;
}
void gui_display_image(png_t *png)
{
Display *display = XOpenDisplay(NULL);
int screen = DefaultScreen(display);
int black = BlackPixel(display, screen);
Window window = XCreateSimpleWindow(
display,
DefaultRootWindow(display),
0, 0,
png->width, png->height,
0,
black, black);
char title[500];
snprintf(title, 500, "%s - %dx%d - pngview",
png->name, png->width, png->height);
XStoreName(display, window, title);
XSizeHints *hints = XAllocSizeHints();
hints->flags = PMinSize | PMaxSize;
hints->min_width = hints->max_width = png->width;
hints->min_height = hints->max_height = png->height;
XSetWMNormalHints(display, window, hints);
XFree(hints);
XMapWindow(display, window);
GC gc = DefaultGC(display, screen);
Visual *visual = DefaultVisual(display, screen);
char *image_data = png_get_data(png);
XImage *image = XCreateImage(display, visual, 24, ZPixmap, 0,
image_data, png->width, png->height, 32, 0);
XSelectInput(display, window, ExposureMask);
while (1) {
XEvent event;
XNextEvent(display, &event);
switch(event.type) {
case Expose:
if (event.xexpose.count > 0) {
break;
}
XPutImage(display, window, gc, image, 0, 0, 0, 0,
png->width, png->height);
break;
}
}
XCloseDisplay(display);
}
int open_png(png_file* file, const char* path) {
int r;
r = png_open_file(&file->png_obj, path);
png_write_error(r);
if( r >= PNG_NO_ERROR ) {
file->data = (unsigned char*)malloc(file->png_obj.width*file->png_obj.height*file->png_obj.bpp);
r = png_get_data(&file->png_obj, file->data);
png_write_error(r);
file->is_open = 1;
}
return r;
}
int CGraphics_OpenGL::LoadPNG(CImageInfo *pImg, const char *pFilename, int StorageType)
{
char aCompleteFilename[512];
unsigned char *pBuffer;
png_t Png; // ignore_convention
// open file for reading
png_init(0,0); // ignore_convention
IOHANDLE File = m_pStorage->OpenFile(pFilename, IOFLAG_READ, StorageType, aCompleteFilename, sizeof(aCompleteFilename));
if(File)
io_close(File);
else
{
dbg_msg("game/png", "failed to open file. filename='%s'", pFilename);
return 0;
}
int Error = png_open_file(&Png, aCompleteFilename); // ignore_convention
if(Error != PNG_NO_ERROR)
{
dbg_msg("game/png", "failed to open file. filename='%s'", aCompleteFilename);
if(Error != PNG_FILE_ERROR)
png_close_file(&Png); // ignore_convention
return 0;
}
if(Png.depth != 8 || (Png.color_type != PNG_TRUECOLOR && Png.color_type != PNG_TRUECOLOR_ALPHA)) // ignore_convention
{
dbg_msg("game/png", "invalid format. filename='%s'", aCompleteFilename);
png_close_file(&Png); // ignore_convention
return 0;
}
pBuffer = (unsigned char *)mem_alloc(Png.width * Png.height * Png.bpp, 1); // ignore_convention
png_get_data(&Png, pBuffer); // ignore_convention
png_close_file(&Png); // ignore_convention
pImg->m_Width = Png.width; // ignore_convention
pImg->m_Height = Png.height; // ignore_convention
if(Png.color_type == PNG_TRUECOLOR) // ignore_convention
pImg->m_Format = CImageInfo::FORMAT_RGB;
else if(Png.color_type == PNG_TRUECOLOR_ALPHA) // ignore_convention
pImg->m_Format = CImageInfo::FORMAT_RGBA;
pImg->m_pData = pBuffer;
return 1;
}
static void LoadTexture()
{
png_t gandhi;
unsigned char* data;
GLuint textureHandle;
png_init(0, 0);
png_open_file_read(&gandhi, "../demo/Gandhi.png");
data = (unsigned char*) malloc(gandhi.width * gandhi.height * gandhi.bpp);
png_get_data(&gandhi, data);
glGenTextures(1, &textureHandle);
glBindTexture(GL_TEXTURE_2D, textureHandle);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, gandhi.width, gandhi.height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
png_close_file(&gandhi);
free(data);
}
int DilateFile(const char *pFileName)
{
png_t Png;
CPixel *pBuffer[3] = {0,0,0};
png_init(0, 0);
png_open_file(&Png, pFileName);
if(Png.color_type != PNG_TRUECOLOR_ALPHA)
{
dbg_msg("dilate", "%s: not an RGBA image", pFileName);
return 1;
}
pBuffer[0] = (CPixel*)mem_alloc(Png.width*Png.height*sizeof(CPixel), 1);
pBuffer[1] = (CPixel*)mem_alloc(Png.width*Png.height*sizeof(CPixel), 1);
pBuffer[2] = (CPixel*)mem_alloc(Png.width*Png.height*sizeof(CPixel), 1);
png_get_data(&Png, (unsigned char *)pBuffer[0]);
png_close_file(&Png);
int w = Png.width;
int h = Png.height;
Dilate(w, h, pBuffer[0], pBuffer[1]);
for(int i = 0; i < 5; i++)
{
Dilate(w, h, pBuffer[1], pBuffer[2]);
Dilate(w, h, pBuffer[2], pBuffer[1]);
}
CopyAlpha(w, h, pBuffer[0], pBuffer[1]);
// save here
png_open_file_write(&Png, pFileName);
png_set_data(&Png, w, h, 8, PNG_TRUECOLOR_ALPHA, (unsigned char *)pBuffer[1]);
png_close_file(&Png);
return 0;
}
static Colour *buffer_from_png(const char *filename, int *width, int *height)
{
unsigned char *data;
Colour *buffer;
png_t png;
png_init(NULL, NULL);
if (png_open_file_read(&png, filename) != PNG_NO_ERROR)
{
printf("Couldn't open file %s\n", filename);
return NULL;
}
*width = png.width;
*height = png.height;
assert(png.bpp == 4 || png.bpp == 3);
data = calloc(png.width * png.height * png.bpp, 1);
int ret = png_get_data(&png, data);
if (ret != PNG_NO_ERROR)
{
printf("%d\n", ret);
free(data);
printf("Error getting data from png %s\n", filename);
return NULL;
}
if (png.bpp == 4)
buffer = colour_buffer_from_rgba(data, png.width, png.height);
else
buffer = colour_buffer_from_rgb(data, png.width, png.height);
free(data);
return buffer;
}