mirror of https://github.com/axmolengine/axmol.git
266 lines
9.3 KiB
C++
266 lines
9.3 KiB
C++
/****************************************************************************
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Copyright (c) 2018-2019 Xiamen Yaji Software Co., Ltd.
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https://axis-project.github.io/
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include <array>
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#include "../Texture.h"
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#include "platform/CCGL.h"
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#include "base/CCEventListenerCustom.h"
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NS_AX_BACKEND_BEGIN
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/**
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* Store texture information.
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*/
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struct TextureInfoGL
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{
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void applySampler(const SamplerDescriptor& desc, bool isPow2, bool hasMipmaps, GLenum target);
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void setCurrentTexParameters(GLenum target);
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TextureInfoGL() { textures.fill(0); }
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~TextureInfoGL() { destroy(); }
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template <typename _Fty>
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void foreach (const _Fty& cb) const
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{
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GLuint texID;
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int idx = 0;
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while ((texID = textures[idx]))
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cb(texID, idx++);
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}
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GLuint ensure(int index, GLenum target);
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void recreateAll(GLenum target);
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void destroy()
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{
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foreach ([=](GLuint texID, int) { glDeleteTextures(1, &texID); })
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;
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textures.fill(0);
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}
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/// <summary>
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/// Apply shader texture
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/// </summary>
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/// <param name="slot">the slot in shader</param>
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/// <param name="index">the index in meta textrues</param>
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/// <param name="target">the target GL_TEXTURE_2D,GL_TEXTURE_CUBE_MAP</param>
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void apply(int slot, int index, GLenum target) const;
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GLuint getName(int index) const { return textures[0]; }
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GLint magFilterGL = GL_LINEAR;
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GLint minFilterGL = GL_LINEAR;
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GLint sAddressModeGL = GL_REPEAT;
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GLint tAddressModeGL = GL_REPEAT;
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// Used in glTexImage2D().
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GLint internalFormat = GL_RGBA;
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GLenum format = GL_RGBA;
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GLenum type = GL_UNSIGNED_BYTE;
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std::array<GLuint, AX_META_TEXTURES + 1> textures;
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int maxIdx = 0;
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};
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/**
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* @addtogroup _opengl
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* @{
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*/
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/**
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* A 2D texture
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*/
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class Texture2DGL : public backend::Texture2DBackend
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{
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public:
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/**
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* @param descirptor Specifies the texture description.
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*/
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Texture2DGL(const TextureDescriptor& descriptor);
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~Texture2DGL();
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/**
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* Update a two-dimensional texture image
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* @param data Specifies a pointer to the image data in memory.
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* @param width Specifies the width of the texture image.
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* @param height Specifies the height of the texture image.
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* @param level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap
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* reduction image.
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*/
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virtual void updateData(uint8_t* data,
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std::size_t width,
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std::size_t height,
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std::size_t level,
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int index = 0) override;
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/**
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* Update a two-dimensional texture image in a compressed format
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* @param data Specifies a pointer to the compressed image data in memory.
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* @param width Specifies the width of the texture image.
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* @param height Specifies the height of the texture image.
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* @param dataLen Specifies the totoal size of compressed image in bytes.
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* @param level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap
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* reduction image.
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*/
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virtual void updateCompressedData(uint8_t* data,
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std::size_t width,
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std::size_t height,
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std::size_t dataLen,
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std::size_t level,
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int index = 0) override;
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/**
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* Update a two-dimensional texture subimage
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* @param xoffset Specifies a texel offset in the x direction within the texture array.
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* @param yoffset Specifies a texel offset in the y direction within the texture array.
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* @param width Specifies the width of the texture subimage.
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* @param height Specifies the height of the texture subimage.
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* @param level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap
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* reduction image.
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* @param data Specifies a pointer to the image data in memory.
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*/
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virtual void updateSubData(std::size_t xoffset,
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std::size_t yoffset,
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std::size_t width,
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std::size_t height,
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std::size_t level,
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uint8_t* data,
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int index = 0) override;
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/**
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* Update a two-dimensional texture subimage in a compressed format
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* @param xoffset Specifies a texel offset in the x direction within the texture array.
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* @param yoffset Specifies a texel offset in the y direction within the texture array.
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* @param width Specifies the width of the texture subimage.
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* @param height Specifies the height of the texture subimage.
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* @param dataLen Specifies the totoal size of compressed subimage in bytes.
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* @param level Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap
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* reduction image.
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* @param data Specifies a pointer to the compressed image data in memory.
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*/
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virtual void updateCompressedSubData(std::size_t xoffset,
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std::size_t yoffset,
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std::size_t width,
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std::size_t height,
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std::size_t dataLen,
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std::size_t level,
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uint8_t* data,
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int index = 0) override;
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/**
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* Update sampler
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* @param sampler Specifies the sampler descriptor.
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*/
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virtual void updateSamplerDescriptor(const SamplerDescriptor& sampler) override;
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/**
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* Generate mipmaps.
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*/
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virtual void generateMipmaps() override;
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/**
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* Update texture description.
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* @param descriptor Specifies texture and sampler descriptor.
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*/
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virtual void updateTextureDescriptor(const TextureDescriptor& descriptor, int index = 0) override;
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/**
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* Get texture object.
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* @return Texture object.
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*/
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uintptr_t getHandler(int index = 0) const override { return _textureInfo.textures[index]; }
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/**
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* Set texture to pipeline
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* @param index Specifies the texture image unit selector.
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*/
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void apply(int slot, int index) const { _textureInfo.apply(slot, index, GL_TEXTURE_2D); }
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int getCount() const override { return _textureInfo.maxIdx + 1; }
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private:
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void initWithZeros();
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TextureInfoGL _textureInfo;
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EventListener* _backToForegroundListener = nullptr;
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};
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/**
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* Texture cube.
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*/
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class TextureCubeGL : public backend::TextureCubemapBackend
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{
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public:
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/**
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* @param descirptor Specifies the texture description.
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*/
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TextureCubeGL(const TextureDescriptor& descriptor);
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~TextureCubeGL();
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/**
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* Update sampler
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* @param sampler Specifies the sampler descriptor.
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*/
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virtual void updateSamplerDescriptor(const SamplerDescriptor& sampler) override;
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/**
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* Update texutre cube data in give slice side.
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* @param side Specifies which slice texture of cube to be update.
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* @param data Specifies a pointer to the image data in memory.
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*/
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virtual void updateFaceData(TextureCubeFace side, void* data, int index = 0) override;
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/// Generate mipmaps.
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virtual void generateMipmaps() override;
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/**
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* Update texture description.
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* @param descriptor Specifies texture and sampler descriptor.
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*/
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virtual void updateTextureDescriptor(const TextureDescriptor& descriptor, int index = 0) override;
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/**
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* Get texture object.
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* @return Texture object.
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*/
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uintptr_t getHandler(int index = 0) const override { return _textureInfo.textures[index]; }
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/**
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* Set texture to pipeline
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* @param index Specifies the texture image unit selector.
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*/
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void apply(int slot, int index) const { _textureInfo.apply(slot, index, GL_TEXTURE_CUBE_MAP); }
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int getCount() const override { return _textureInfo.maxIdx + 1; }
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private:
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TextureInfoGL _textureInfo;
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EventListener* _backToForegroundListener = nullptr;
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};
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// end of _opengl group
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/// @}
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NS_AX_BACKEND_END
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