matthias/openglplayground
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

WIP

Browse Source
This commit is contained in:
Matthias Blankertz
2015-02-13 20:00:39 +01:00
parent 523c4adb21
commit bdc2ef58f4
5 changed files with 109 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

128
texture.cc
View File

@@ -103,13 +103,13 @@ void TextureCubeMap::bind() const
Texture2D::Texture2D(unsigned width, unsigned height)
: _texID(0)
: texID_(0), width_(width), height_(height), alpha_(false)
{
_glCreate(width, height);
}
Texture2D::Texture2D(std::string const& file)
: _texID(0)
: texID_(0), width_(0), height_(0), alpha_(false)
{
SDL_Surface *surf = IMG_Load(file.c_str());
if (!surf)
@@ -124,7 +124,7 @@ Texture2D::Texture2D(std::string const& file)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, surf->w, surf->h, GL_RGB, GL_UNSIGNED_BYTE, surf->pixels);
glGenerateMipmap(GL_TEXTURE_2D);
} catch(...) {
glDeleteTextures(1, &_texID);
glDeleteTextures(1, &texID_);
throw;
}
}
@@ -136,78 +136,118 @@ Texture2D::Texture2D(std::string const& file)
}
Texture2D::Texture2D(SDL_Surface *surface)
: _texID(0)
: texID_(0), width_(0), height_(0), alpha_(false)
{
if(surface->format->Amask == 0)
_glCreate(surface->w, surface->h);
else
else {
_glCreate(surface->w, surface->h, true);
}
try {
SDL_Surface *surf;
if((surface->format->format != SDL_PIXELFORMAT_RGB24) &&
(surface->format->format != SDL_PIXELFORMAT_RGBA8888)) {
if(surface->format->Amask == 0) {
surf = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_RGB24, 0);
} else {
surf = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ABGR8888, 0);
}
if(!surf)
throw SDLException{};
} else {
surf = surface;
}
if (SDL_MUSTLOCK(surf))
SDL_LockSurface(surf);
try {
if(surface->format->Amask == 0)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, surf->w, surf->h, GL_RGB, GL_UNSIGNED_BYTE, surf->pixels);
else
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, surf->w, surf->h, GL_RGBA, GL_UNSIGNED_BYTE, surf->pixels);
glGenerateMipmap(GL_TEXTURE_2D);
} catch(...) {
if (surf != surface)
SDL_FreeSurface(surf);
throw;
}
SDL_FreeSurface(surf);
copyFromSurface(surface);
} catch(...) {
glDeleteTextures(1, &_texID);
glDeleteTextures(1, &texID_);
throw;
}
}
Texture2D::Texture2D(Texture2D&& move)
: _texID(move._texID)
: texID_(move.texID_), width_(move.width_), height_(move.height_), alpha_(move.alpha_)
{
move._texID = 0;
move.texID_ = 0;
}
Texture2D& Texture2D::operator=(Texture2D&& move)
{
glDeleteTextures(1, &_texID);
_texID = move._texID;
move._texID = 0;
glDeleteTextures(1, &texID_);
texID_ = move.texID_;
width_ = move.width_;
height_ = move.height_;
alpha_ = move.alpha_;
move.texID_ = 0;
return *this;
}
Texture2D::~Texture2D()
{
glDeleteTextures(1, &_texID);
glDeleteTextures(1, &texID_);
}
void Texture2D::bind() const
{
glBindTexture(GL_TEXTURE_2D, _texID);
glBindTexture(GL_TEXTURE_2D, texID_);
}
void Texture2D::copyFromSurface(SDL_Surface *src)
{
SDL_Surface *surf;
if ((src->w > width_) || src->h > height_)
throw Exception("Cannot replace texture image with larger image");
if ((src->format->format != SDL_PIXELFORMAT_RGB24) &&
(src->format->format != SDL_PIXELFORMAT_RGBA8888)) {
if ((src->format->Amask != 0) != alpha_)
throw Exception("Cannot replace texture image with mismatched alpha");
if (src->format->Amask == 0) {
surf = SDL_ConvertSurfaceFormat(src, SDL_PIXELFORMAT_RGB24, 0);
} else {
surf = SDL_ConvertSurfaceFormat(src, SDL_PIXELFORMAT_ABGR8888, 0);
}
if (!surf)
throw SDLException{};
} else {
surf = src;
}
if (SDL_MUSTLOCK(surf))
SDL_LockSurface(surf);
try {
bind();
if(surf->format->Amask == 0)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, surf->w, surf->h, GL_RGB, GL_UNSIGNED_BYTE, surf->pixels);
else
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, surf->w, surf->h, GL_RGBA, GL_UNSIGNED_BYTE, surf->pixels);
glGenerateMipmap(GL_TEXTURE_2D);
} catch(...) {
if (surf != src)
SDL_FreeSurface(surf);
throw;
}
if(surf != src)
SDL_FreeSurface(surf);
}
SDL_Surface* Texture2D::copyToSurface()
{
bind();
uint32_t rmask, gmask, bmask, amask;
int bpp;
if (!SDL_PixelFormatEnumToMasks(alpha_?SDL_PIXELFORMAT_ABGR8888:SDL_PIXELFORMAT_RGB24,
&bpp, &rmask, &gmask, &bmask, &amask))
throw SDLException{};
SDL_Surface *dst = SDL_CreateRGBSurface(0, width_, height_, bpp,
rmask, gmask, bmask, amask);
if(!dst)
throw SDLException{};
try {
glGetTexImage(GL_TEXTURE_2D, 0, alpha_?GL_RGBA:GL_RGB, GL_UNSIGNED_BYTE, dst->pixels);
} catch(...) {
SDL_FreeSurface(dst);
throw;
}
return dst;
}
void Texture2D::_glCreate(unsigned width, unsigned height, bool alpha)
{
glGenTextures(1, &_texID);
width_ = width;
height_ = height;
alpha_ = alpha;
glGenTextures(1, &texID_);
try {
glBindTexture(GL_TEXTURE_2D, _texID);
glBindTexture(GL_TEXTURE_2D, texID_);
unsigned logWidth = ilog2(width), logHeight = ilog2(height);
unsigned levels = std::max(logWidth,logHeight)+1u;
if(SDL_GL_ExtensionSupported("GL_ARB_texture_storage"))
@@ -223,6 +263,6 @@ void Texture2D::_glCreate(unsigned width, unsigned height, bool alpha)
}
}
} catch(...) {
glDeleteTextures(1, &_texID);
glDeleteTextures(1, &texID_);
}
}