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#pragma once
#include "GLHashMap.h"
#include <Containers/StringView.h>
using namespace Death::Containers;
namespace nCine
{
/// Handles OpenGL 2D textures
class GLTexture
{
friend class GLFramebuffer;
friend class Qt5GfxDevice;
friend class ImGuiDrawing;
public:
static constexpr std::uint32_t MaxTextureUnits = 8;
explicit GLTexture(GLenum target_);
~GLTexture();
GLTexture(const GLTexture&) = delete;
GLTexture& operator=(const GLTexture&) = delete;
inline GLuint GetGLHandle() const {
return glHandle_;
}
inline GLenum GetTarget() const {
return target_;
}
bool Bind(std::uint32_t textureUnit) const;
inline bool Bind() const {
return Bind(0);
}
bool Unbind() const;
static bool Unbind(GLenum target, std::uint32_t textureUnit);
static bool Unbind(std::uint32_t textureUnit);
void TexImage2D(GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, const void* data);
void TexSubImage2D(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const void* data);
void CompressedTexImage2D(GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLsizei imageSize, const void* data);
void CompressedTexSubImage2D(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void* data);
void TexStorage2D(GLsizei levels, GLint internalFormat, GLsizei width, GLsizei height);
void GetTexImage(GLint level, GLenum format, GLenum type, void* pixels);
void TexParameterf(GLenum pname, GLfloat param);
void TexParameteri(GLenum pname, GLint param);
void SetObjectLabel(StringView label);
private:
static class GLHashMap<GLTextureMappingFunc::Size, GLTextureMappingFunc> boundTextures_[MaxTextureUnits];
static std::uint32_t boundUnit_;
GLuint glHandle_;
GLenum target_;
/// The texture unit is mutable in order for constant texture objects to be bound
/*! A texture can be bound to a specific texture unit. */
mutable std::uint32_t textureUnit_;
static bool BindHandle(GLenum target, GLuint glHandle, std::uint32_t textureUnit);
static bool BindHandle(GLenum target, GLuint glHandle) {
return BindHandle(target, glHandle, 0);
}
static GLuint GetBoundHandle(GLenum target, unsigned int textureUnit);
static GLuint GetBoundHandle(GLenum target) {
return GetBoundHandle(target, 0);
}
};
}
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