void GImage::loadPng(const char* szFilename)
{
size_t nSize;
std::ifstream s;
char* pBuf;
s.exceptions(std::ios::badbit);
try
{
// NB: we double copy the content of the file!
// Once in a std::string and then to final destination
// We do this so it will work with named pipes, which
// do not permit seeking to the end of the file to determine
// the file length.
s.open(szFilename, std::ios::binary);
std::stringstream buffer;
buffer << s.rdbuf();
std::string content = buffer.str();
nSize = content.size();
pBuf = new char[nSize];
memcpy(pBuf, content.data(), nSize);
s.close();
}
catch(const std::exception&)
{
throw Ex("Error while trying to open the file, ", szFilename, ". ", strerror(errno));
}
readPng(this, (const unsigned char*)pBuf, nSize);
delete[] pBuf;
}
bool
PngScreen::fileToImage (CompString &name,
CompSize &size,
int &stride,
void *&data)
{
bool status = false;
std::ifstream file;
CompString fileName = fileNameWithExtension (name);
file.open (fileName.c_str ());
if (file.is_open ())
{
status = readPng (file, size, data);
file.close ();
}
if (status)
{
stride = size.width () * 4;
return true;
}
return screen->fileToImage (name, size, stride, data);
}
static bool runPngTest(const char *const romfile, const bool forceDmg, const char *const pngfile) {
gambatte::uint_least32_t framebuf[160 * 144];
runTestRom(framebuf, romfile, forceDmg);
gambatte::uint_least32_t pngbuf[160 * 144];
readPng(pngbuf, pngfile);
if (!frameBufsEqual(framebuf, pngbuf)) {
std::printf("\nFAILED: %s %s\n", romfile, pngfile);
return false;
}
return true;
}
Texture2D::Texture2D(const string& relativePath){
// 根据后缀判断
auto postfix = GetPostfix(relativePath);
transform(postfix.begin(),postfix.end(),postfix.begin(),tolower);
auto fullpath = FileUtil::getInstacne()->getFullPath(relativePath);
// printf("fullpath:%s\n",fullpath.c_str());
if (postfix == "png") {
readPng(fullpath);
}else if (postfix == "jpg" || postfix == "jpeg"){
readJpeg(fullpath);
}else{
printf("can not support image formatter : %s\n",postfix.c_str());
}
}
Bool
readImageToTexture (CompScreen *screen,
CompTexture *texture,
char *imageFileName,
unsigned int *returnWidth,
unsigned int *returnHeight)
{
char *data, *image;
unsigned int width, height;
int i;
if (!readPng (imageFileName, &image, &width, &height))
{
fprintf (stderr, "%s: Failed to load image: %s\n",
programName, imageFileName);
return FALSE;
}
data = malloc (4 * width * height);
if (!data)
{
free (image);
return FALSE;
}
for (i = 0; i < height; i++)
memcpy (&data[i * width * 4],
&image[(height - i - 1) * width * 4],
width * 4);
free (image);
releasePixmapFromTexture (screen, texture);
if (screen->textureNonPowerOfTwo ||
(POWER_OF_TWO (width) && POWER_OF_TWO (height)))
{
texture->target = GL_TEXTURE_2D;
texture->matrix.xx = 1.0f / width;
texture->matrix.yy = -1.0f / height;
texture->matrix.y0 = 1.0f;
}
else
{
texture->target = GL_TEXTURE_RECTANGLE_NV;
texture->matrix.xx = 1.0f;
texture->matrix.yy = -1.0f;
texture->matrix.y0 = height;
}
if (!texture->name)
glGenTextures (1, &texture->name);
glBindTexture (texture->target, texture->name);
glTexImage2D (texture->target, 0, GL_RGB, width, height, 0, GL_BGRA,
#if IMAGE_BYTE_ORDER == MSBFirst
GL_UNSIGNED_INT_8_8_8_8_REV,
#else
GL_UNSIGNED_BYTE,
#endif
data);
texture->filter = COMP_TEXTURE_FILTER_FAST;
glTexParameteri (texture->target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri (texture->target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri (texture->target, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri (texture->target, GL_TEXTURE_WRAP_T, GL_CLAMP);
glBindTexture (texture->target, 0);
free (data);
*returnWidth = width;
*returnHeight = height;
return TRUE;
}
