void CTextureAtlas::CreateTexture()
{
const int2 atlasSize = atlasAllocator->GetAtlasSize();
PBO pbo;
pbo.Bind();
pbo.Resize(atlasSize.x * atlasSize.y * 4);
unsigned char* data = (unsigned char*)pbo.MapBuffer(GL_WRITE_ONLY);
{
// make spacing between textures black transparent to avoid ugly lines with linear filtering
std::memset(data, 0, atlasSize.x * atlasSize.y * 4);
for (std::vector<MemTex*>::iterator it = memtextures.begin(); it != memtextures.end(); ++it) {
const float4 texCoords = atlasAllocator->GetTexCoords((*it)->names[0]);
const float4 absCoords = atlasAllocator->GetEntry((*it)->names[0]);
const int xpos = absCoords.x;
const int ypos = absCoords.y;
AtlasedTexture tex(texCoords);
for (size_t n = 0; n < (*it)->names.size(); ++n) {
textures[(*it)->names[n]] = tex;
}
for (int y = 0; y < (*it)->ysize; ++y) {
int* dst = ((int*)data) + xpos + (ypos + y) * atlasSize.x;
int* src = ((int*)(*it)->data) + y * (*it)->xsize;
memcpy(dst, src, (*it)->xsize * 4);
}
}
if (debug) {
CBitmap tex(data, atlasSize.x, atlasSize.y);
tex.Save(name + "-" + IntToString(atlasSize.x) + "x" + IntToString(atlasSize.y) + ".png");
}
}
pbo.UnmapBuffer();
const int maxMipMaps = atlasAllocator->GetMaxMipMaps();
glGenTextures(1, &atlasTexID);
glBindTexture(GL_TEXTURE_2D, atlasTexID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, (maxMipMaps > 0) ? GL_LINEAR_MIPMAP_NEAREST : GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, maxMipMaps);
if (maxMipMaps > 0) {
glBuildMipmaps(GL_TEXTURE_2D, GL_RGBA8, atlasSize.x, atlasSize.y, GL_RGBA, GL_UNSIGNED_BYTE, pbo.GetPtr()); //FIXME disable texcompression //FIXME 2 PBO!!!!
} else {
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, atlasSize.x, atlasSize.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, pbo.GetPtr());
}
pbo.Unbind();
initialized = true;
}
void CTextureAtlas::CreateTexture()
{
PBO pbo;
pbo.Bind();
pbo.Resize(xsize * ysize * 4);
unsigned char* data = (unsigned char*)pbo.MapBuffer(GL_WRITE_ONLY);
std::memset(data, 0, xsize * ysize * 4); //! make spacing between textures black transparent to avoid ugly lines with linear filtering
for (size_t i = 0; i < memtextures.size(); ++i) {
MemTex& tex = *memtextures[i];
for (int y = 0; y < tex.ysize; ++y) {
int* dst = ((int*)data) + tex.xpos + (tex.ypos + y) * xsize;
int* src = ((int*)tex.data) + y * tex.xsize;
memcpy(dst, src, tex.xsize * 4);
}
}
if (debug) {
//! hack to make sure we don't overwrite our own atlases
static int count = 0;
char fname[256];
SNPRINTF(fname, sizeof(fname), "textureatlas%d.png", ++count);
//! even pbo.MapBuffer(GL_WRITE_ONLY) we can readback from it. GL_READ is only needed if we want to readback GPU data!
CBitmap save(data,xsize,ysize);
save.Save(fname);
logOutput.Print("Saved finalized textureatlas to '%s'.", fname);
}
pbo.UnmapBuffer();
glGenTextures(1, &gltex);
glBindTexture(GL_TEXTURE_2D, gltex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST/*GL_NEAREST_MIPMAP_LINEAR*/);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, xsize, ysize, 0, GL_RGBA, GL_UNSIGNED_BYTE, pbo.GetPtr());
pbo.Unbind();
initialized = true;
}
void CTextureAtlas::CreateTexture()
{
const int2 atlasSize = atlasAllocator->GetAtlasSize();
xsize = atlasSize.x;
ysize = atlasSize.y;
PBO pbo;
pbo.Bind();
pbo.Resize(atlasSize.x * atlasSize.y * 4);
unsigned char* data = (unsigned char*)pbo.MapBuffer(GL_WRITE_ONLY);
std::memset(data, 0, atlasSize.x * atlasSize.y * 4); // make spacing between textures black transparent to avoid ugly lines with linear filtering
for(std::vector<MemTex*>::iterator it = memtextures.begin(); it != memtextures.end(); ++it) {
float4 texCoords = atlasAllocator->GetTexCoords((*it)->names[0]);
float4 absCoords = atlasAllocator->GetEntry((*it)->names[0]);
const int xpos = absCoords.x;
const int ypos = absCoords.y;
AtlasedTexture tex(texCoords);
for (size_t n = 0; n < (*it)->names.size(); ++n) {
textures[(*it)->names[n]] = tex;
}
for (int y = 0; y < (*it)->ysize; ++y) {
int* dst = ((int*)data) + xpos + (ypos + y) * atlasSize.x;
int* src = ((int*)(*it)->data) + y * (*it)->xsize;
memcpy(dst, src, (*it)->xsize * 4);
}
}
if (debug) {
// hack to make sure we don't overwrite our own atlases
static int count = 0;
char fname[256];
SNPRINTF(fname, sizeof(fname), "textureatlas%d.png", ++count);
CBitmap save(data, atlasSize.x, atlasSize.y);
save.Save(fname);
LOG("Saved finalized texture-atlas to '%s'.", fname);
}
pbo.UnmapBuffer();
const int maxMipMaps = atlasAllocator->GetMaxMipMaps();
glGenTextures(1, &gltex);
glBindTexture(GL_TEXTURE_2D, gltex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, (maxMipMaps > 0) ? GL_LINEAR_MIPMAP_NEAREST : GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, maxMipMaps);
if (maxMipMaps > 0) {
glBuildMipmaps(GL_TEXTURE_2D, GL_RGBA8, atlasSize.x, atlasSize.y, GL_RGBA, GL_UNSIGNED_BYTE, pbo.GetPtr()); //FIXME disable texcompression //FIXME 2 PBO!!!!
} else {
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, atlasSize.x, atlasSize.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, pbo.GetPtr());
}
pbo.Unbind();
initialized = true;
}