PulseStudio/VoxelEngine
PulseStudio/VoxelEngine
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Texture.readData

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This commit is contained in:
MihailRis 2024-01-21 22:29:14 +03:00
parent 6430121cf2
commit 714a49685f
2 changed files with 41 additions and 30 deletions
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67
src/graphics/Texture.cpp
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@ -1,52 +1,61 @@
#include "Texture.h" #include "Texture.h"
#include <GL/glew.h> #include <GL/glew.h>
#include <stdexcept> #include <stdexcept>
#include <memory>
#include "ImageData.h" #include "ImageData.h"
Texture::Texture(uint id, int width, int height) Texture::Texture(uint id, int width, int height)
: id(id), width(width), height(height) { : id(id), width(width), height(height) {
} }
Texture::Texture(ubyte* data, int width, int height, uint format) Texture::Texture(ubyte* data, int width, int height, uint format)
: width(width), height(height) { : width(width), height(height) {
glGenTextures(1, &id); glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_2D, id); glBindTexture(GL_TEXTURE_2D, id);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0,
format, GL_UNSIGNED_BYTE, (GLvoid *) data); format, GL_UNSIGNED_BYTE, (GLvoid *) data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glGenerateMipmap(GL_TEXTURE_2D); glGenerateMipmap(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 2); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 2);
glBindTexture(GL_TEXTURE_2D, 0); glBindTexture(GL_TEXTURE_2D, 0);
} }
Texture::~Texture() { Texture::~Texture() {
glDeleteTextures(1, &id); glDeleteTextures(1, &id);
} }
void Texture::bind(){ void Texture::bind(){
glBindTexture(GL_TEXTURE_2D, id); glBindTexture(GL_TEXTURE_2D, id);
} }
void Texture::reload(ubyte* data){ void Texture::reload(ubyte* data){
glBindTexture(GL_TEXTURE_2D, id); glBindTexture(GL_TEXTURE_2D, id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *) data); GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *) data);
glBindTexture(GL_TEXTURE_2D, 0); glBindTexture(GL_TEXTURE_2D, 0);
}
ImageData* Texture::readData() {
std::unique_ptr<ubyte[]> data (new ubyte[width * height * 4]);
glBindTexture(GL_TEXTURE_2D, id);
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data.get());
glBindTexture(GL_TEXTURE_2D, 0);
return new ImageData(ImageFormat::rgba8888, width, height, data.release());
} }
Texture* Texture::from(const ImageData* image) { Texture* Texture::from(const ImageData* image) {
uint width = image->getWidth(); uint width = image->getWidth();
uint height = image->getHeight(); uint height = image->getHeight();
uint format; uint format;
const void* data = image->getData(); const void* data = image->getData();
switch (image->getFormat()) { switch (image->getFormat()) {
case ImageFormat::rgb888: format = GL_RGB; break; case ImageFormat::rgb888: format = GL_RGB; break;
case ImageFormat::rgba8888: format = GL_RGBA; break; case ImageFormat::rgba8888: format = GL_RGBA; break;
default: default:
throw std::runtime_error("unsupported image data format"); throw std::runtime_error("unsupported image data format");
} }
return new Texture((ubyte*)data, width, height, format); return new Texture((ubyte*)data, width, height, format);
} }

2
src/graphics/Texture.h
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@ -18,6 +18,8 @@ public:
void bind(); void bind();
void reload(ubyte* data); void reload(ubyte* data);
ImageData* readData();
static Texture* from(const ImageData* image); static Texture* from(const ImageData* image);
}; };