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Enhance OpenGLTexture with more texture types

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- Add OpenGLTextureType enum (1D, 2D, 2DArray, 3D, Cube, CubeArray)
- Add OpenGLFormat enum for texture formats
- Add Initialize() method for generic texture creation
- Add InitializeCubeMap() for cubemap textures
- Add BindImage() for image load/store
- Add GenerateMipmap(), SetFiltering(), SetWrapping() methods
- Add GetType(), GetMipLevels(), GetDepth() getters
This commit is contained in:
ssdfasd
2026-03-17 02:10:53 +08:00
parent 56c32bfbde
commit a54666df11
2 changed files with 206 additions and 12 deletions
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171
engine/src/RHI/OpenGL/OpenGLTexture.cpp
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@@ -8,10 +8,54 @@
namespace XCEngine {
namespace RHI {
static unsigned int ToGLTextureTarget(OpenGLTextureType type) {
switch (type) {
case OpenGLTextureType::Texture1D: return GL_TEXTURE_1D;
case OpenGLTextureType::Texture2D: return GL_TEXTURE_2D;
case OpenGLTextureType::Texture2DArray: return GL_TEXTURE_2D_ARRAY;
case OpenGLTextureType::Texture3D: return GL_TEXTURE_3D;
case OpenGLTextureType::TextureCube: return GL_TEXTURE_CUBE_MAP;
case OpenGLTextureType::TextureCubeArray: return GL_TEXTURE_CUBE_MAP_ARRAY;
default: return GL_TEXTURE_2D;
}
}
static void ToGLFormat(OpenGLFormat fmt, unsigned int& internalFormat, unsigned int& glFormat, unsigned int& glType) {
switch (fmt) {
case OpenGLFormat::R8:
internalFormat = GL_R8; glFormat = GL_RED; glType = GL_UNSIGNED_BYTE;
break;
case OpenGLFormat::RG8:
internalFormat = GL_RG8; glFormat = GL_RG; glType = GL_UNSIGNED_BYTE;
break;
case OpenGLFormat::RGBA8:
internalFormat = GL_RGBA8; glFormat = GL_RGBA; glType = GL_UNSIGNED_BYTE;
break;
case OpenGLFormat::RGBA16F:
internalFormat = GL_RGBA16F; glFormat = GL_RGBA; glType = GL_HALF_FLOAT;
break;
case OpenGLFormat::RGBA32F:
internalFormat = GL_RGBA32F; glFormat = GL_RGBA; glType = GL_FLOAT;
break;
case OpenGLFormat::Depth24Stencil8:
internalFormat = GL_DEPTH24_STENCIL8; glFormat = GL_DEPTH_STENCIL; glType = GL_UNSIGNED_INT_24_8;
break;
case OpenGLFormat::Depth32F:
internalFormat = GL_DEPTH_COMPONENT32F; glFormat = GL_DEPTH_COMPONENT; glType = GL_FLOAT;
break;
default:
internalFormat = GL_RGBA8; glFormat = GL_RGBA; glType = GL_UNSIGNED_BYTE;
break;
}
}
OpenGLTexture::OpenGLTexture()
: m_texture(0)
, m_type(OpenGLTextureType::Texture2D)
, m_width(0)
, m_height(0)
, m_depth(0)
, m_mipLevels(1)
, m_channels(0) {
}
@@ -19,41 +63,110 @@ OpenGLTexture::~OpenGLTexture() {
Shutdown();
}
bool OpenGLTexture::Initialize(OpenGLTextureType type, int width, int height, int depth, int mipLevels, OpenGLFormat format, const void* data) {
m_type = type;
m_width = width;
m_height = height;
m_depth = depth;
m_mipLevels = mipLevels;
unsigned int target = ToGLTextureTarget(type);
unsigned int internalFormat, glFormat, glType;
ToGLFormat(format, internalFormat, glFormat, glType);
glGenTextures(1, &m_texture);
glBindTexture(target, m_texture);
if (type == OpenGLTextureType::TextureCube) {
for (int i = 0; i < 6; i++) {
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, internalFormat, width, height, 0, glFormat, glType, data);
}
} else if (type == OpenGLTextureType::Texture1D) {
glTexImage1D(GL_TEXTURE_1D, 0, internalFormat, width, 0, glFormat, glType, data);
} else if (type == OpenGLTextureType::Texture3D) {
glTexImage3D(GL_TEXTURE_3D, 0, internalFormat, width, height, depth, 0, glFormat, glType, data);
} else {
glTexImage2D(target, 0, internalFormat, width, height, 0, glFormat, glType, data);
}
if (mipLevels > 1) {
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
} else {
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(target, 0);
return true;
}
bool OpenGLTexture::Initialize2D(int width, int height, int channels, const void* data, bool generateMipmap) {
m_channels = channels;
m_type = OpenGLTextureType::Texture2D;
m_width = width;
m_height = height;
m_depth = 1;
m_mipLevels = generateMipmap ? 0 : 1;
glGenTextures(1, &m_texture);
glBindTexture(GL_TEXTURE_2D, m_texture);
GLenum format = (channels == 4) ? GL_RGBA : GL_RGB;
glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
if (generateMipmap) {
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
} else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
m_width = width;
m_height = height;
m_channels = channels;
glBindTexture(GL_TEXTURE_2D, 0);
return true;
}
bool OpenGLTexture::InitializeCubeMap(int size, int mipLevels, OpenGLFormat format, const void* data) {
m_type = OpenGLTextureType::TextureCube;
m_width = size;
m_height = size;
m_depth = 1;
m_mipLevels = mipLevels;
unsigned int internalFormat, glFormat, glType;
ToGLFormat(format, internalFormat, glFormat, glType);
glGenTextures(1, &m_texture);
glBindTexture(GL_TEXTURE_CUBE_MAP, m_texture);
for (int i = 0; i < 6; i++) {
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, internalFormat, size, size, 0, glFormat, glType, data);
}
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, mipLevels > 1 ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
return true;
}
bool OpenGLTexture::LoadFromFile(const char* path, bool flipVertical) {
stbi_set_flip_vertically_on_load(flipVertical ? 1 : 0);
unsigned char* data = stbi_load(path, &m_width, &m_height, &m_channels, 0);
if (!data) {
std::cout << "Failed to load texture: " << path << std::endl;
return false;
}
bool result = Initialize2D(m_width, m_height, m_channels, data, true);
stbi_image_free(data);
return result;
@@ -67,12 +180,46 @@ void OpenGLTexture::Shutdown() {
}
void OpenGLTexture::Bind(int slot) const {
unsigned int target = ToGLTextureTarget(m_type);
glActiveTexture(GL_TEXTURE0 + slot);
glBindTexture(GL_TEXTURE_2D, m_texture);
glBindTexture(target, m_texture);
}
void OpenGLTexture::Unbind() const {
glBindTexture(GL_TEXTURE_2D, 0);
unsigned int target = ToGLTextureTarget(m_type);
glBindTexture(target, 0);
}
void OpenGLTexture::BindImage(int slot, bool read, bool write) const {
unsigned int target = ToGLTextureTarget(m_type);
GLenum access = (read && write) ? GL_READ_WRITE : (read ? GL_READ_ONLY : GL_WRITE_ONLY);
glBindImageTexture(slot, m_texture, 0, GL_FALSE, 0, access, GL_RGBA8);
}
void OpenGLTexture::GenerateMipmap() {
unsigned int target = ToGLTextureTarget(m_type);
glBindTexture(target, m_texture);
glGenerateMipmap(target);
glBindTexture(target, 0);
}
void OpenGLTexture::SetFiltering(int minFilter, int magFilter) {
unsigned int target = ToGLTextureTarget(m_type);
glBindTexture(target, m_texture);
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, minFilter);
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, magFilter);
glBindTexture(target, 0);
}
void OpenGLTexture::SetWrapping(int wrapS, int wrapT, int wrapR) {
unsigned int target = ToGLTextureTarget(m_type);
glBindTexture(target, m_texture);
glTexParameteri(target, GL_TEXTURE_WRAP_S, wrapS);
glTexParameteri(target, GL_TEXTURE_WRAP_T, wrapT);
if (wrapR >= 0 && (m_type == OpenGLTextureType::Texture3D || m_type == OpenGLTextureType::TextureCube)) {
glTexParameteri(target, GL_TEXTURE_WRAP_R, wrapR);
}
glBindTexture(target, 0);
}
} // namespace RHI