framebuffers
Brett
parent
321379fb12
commit
e9e3622963
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@ -1,6 +1,6 @@
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cmake_minimum_required(VERSION 3.25)
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set(BLT_GRAPHICS_VERSION 0.9.13)
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set(BLT_GRAPHICS_VERSION 0.9.14)
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set(BLT_GRAPHICS_TEST_VERSION 0.0.1)
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project(BLT_WITH_GRAPHICS VERSION ${BLT_GRAPHICS_VERSION})
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@ -1,3 +1,9 @@
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# BLT-With-Graphics-Template
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BLT + Graphics + Emscripten
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BLT + Graphics + Emscripten
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TODO: some of the API is inconsistent.
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Textures bind themselves but FBOs do not.
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make more use of factory functions
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@ -25,7 +25,7 @@ blt::gfx::resource_manager resources;
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blt::gfx::batch_renderer_2d renderer_2d(resources);
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blt::gfx::first_person_camera camera;
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void init(blt::gfx::window_context& context)
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void init(const blt::gfx::window_context& context)
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{
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using namespace blt::gfx;
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@ -35,7 +35,7 @@ void init(blt::gfx::window_context& context)
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renderer_2d.create();
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}
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void update(blt::gfx::window_context& context, std::int32_t width, std::int32_t height)
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void update(const blt::gfx::window_context& context, std::int32_t width, std::int32_t height)
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{
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global_matrices.update_perspectives(width, height, 90, 0.1, 2000);
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@ -20,31 +20,94 @@
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#define BLT_WITH_GRAPHICS_FRAMEBUFFER_H
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#include "blt/gfx/gl_includes.h"
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#include <blt/gfx/texture.h>
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#include <vector>
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#include "blt/std/types.h"
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namespace blt::gfx
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{
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#define C(num) COLOR##num = GL_COLOR_ATTACHMENT##num,
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#define COLOR_LIST \
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C(0) C(1) C(2) C(3) C(4) C(5) C(6) C(7) C(8) C(9) C(10) C(11) C(12) C(13) C(14) C(15) C(16) \
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C(17) C(18) C(19) C(20) C(21) C(22) C(23) C(24) C(25) C(26) C(27) C(28) C(29) C(30) C(31)
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class fbo_t;
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class rbo_t
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{
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friend fbo_t;
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private:
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GLuint rboID;
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GLuint storage_type;
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public:
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rbo_t(): rboID(0), storage_type(0)
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{}
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void create();
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void bind() const;
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void setStorage(GLuint storage_type, blt::i32 width, blt::i32 height);
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void updateStorage(blt::i32 width, blt::i32 height) const;
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static void unbind();
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void destroy();
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static rbo_t make_render_buffer(GLuint storage_type, blt::i32 width, blt::i32 height);
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};
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class fbo_t
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{
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public:
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enum class fbo_draw_t : GLuint
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enum class draw_t : GLuint
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{
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DRAW = GL_DRAW_FRAMEBUFFER,
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READ = GL_READ_FRAMEBUFFER,
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BOTH = GL_FRAMEBUFFER
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};
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enum class attachment_t : GLuint
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{
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COLOR_LIST
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DEPTH_STENCIL = GL_DEPTH_STENCIL_ATTACHMENT,
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DEPTH = GL_DEPTH_ATTACHMENT,
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STENCIL = GL_STENCIL_ATTACHMENT
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};
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private:
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GLuint fboID;
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GLuint fboID = 0;
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GLuint generic_bind_type = GL_FRAMEBUFFER;
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std::vector<blt::gfx::texture_gl*> texture_buffers;
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std::vector<rbo_t> render_buffers;
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public:
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void create();
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// default used for fbo binding
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void create(draw_t bind_type = draw_t::BOTH);
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void bind(fbo_draw_t type = fbo_draw_t::BOTH) const;
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void bind(draw_t type = draw_t::BOTH) const;
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bool validate();
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// this function takes ownership of the pointer.
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void attachTexture(blt::gfx::texture_gl* texture, attachment_t attachment, int level = 0);
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void updateBuffersStorage(blt::i32 width, blt::i32 height);
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// this function takes ownership of the render buffer
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void attachRenderBuffer(rbo_t rbo, attachment_t attachment);
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static bool validate();
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static void unbind();
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void destroy();
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public:
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static fbo_t make_render_texture(blt::i32 width, blt::i32 height);
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};
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#undef C
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#undef COLOR_LIST
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}
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#endif //BLT_WITH_GRAPHICS_FRAMEBUFFER_H
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@ -227,7 +227,7 @@ namespace blt::gfx
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glBindVertexArray(0);
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}
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static inline std::shared_ptr<vbo_t_owner> createSharedVBO(const vbo_t& vbo)
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static inline static_dynamic_array::vbo_type createSharedVBO(const vbo_t& vbo)
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{
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return std::make_shared<vbo_t_owner>(vbo);
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}
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@ -24,6 +24,7 @@
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#include <string>
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#include <vector>
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#include <utility>
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#include "blt/std/types.h"
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namespace blt::gfx
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{
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@ -157,6 +158,14 @@ namespace blt::gfx
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return textureID;
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}
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[[nodiscard]] inline GLint getBindType() const
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{
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return textureBindType;
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}
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virtual void updateSize(blt::i32, blt::i32)
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{}
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virtual ~texture_gl()
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{
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glDeleteTextures(1, &textureID);
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@ -177,10 +186,15 @@ namespace blt::gfx
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void upload(const texture_data& file_data) const;
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inline void updateSize(blt::i32 width, blt::i32 height) final
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{
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resize(width, height);
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}
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/**
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* Resizes the internal memory for the texture but does NOT resize the texture image stored
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*/
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inline void resize(int width, int height);
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void resize(int width, int height);
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};
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struct gl_texture2D_array : public texture_gl
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@ -31,14 +31,14 @@ namespace blt::gfx
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std::string title;
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std::int32_t width;
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std::int32_t height;
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std::function<void(window_context&)> init;
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std::function<void(window_context&, std::int32_t, std::int32_t)> update;
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std::function<void(const window_context&)> init;
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std::function<void(const window_context&, std::int32_t, std::int32_t)> update;
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window_context context{};
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std::int32_t sync_interval = 0;
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window_data(std::string title, std::function<void(window_context&)> init,
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std::function<void(window_context&, std::int32_t, std::int32_t)> update, std::int32_t width = 640,
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window_data(std::string title, std::function<void(const window_context&)> init,
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std::function<void(const window_context&, std::int32_t, std::int32_t)> update, std::int32_t width = 640,
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std::int32_t height = 480):
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title(std::move(title)), width(width), height(height), init(std::move(init)), update(std::move(update))
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{}
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@ -18,13 +18,54 @@
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namespace blt::gfx
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{
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void fbo_t::create()
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void rbo_t::create()
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{
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glGenRenderbuffers(1, &rboID);
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}
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void rbo_t::bind() const
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{
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glBindRenderbuffer(GL_RENDERBUFFER, rboID);
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}
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void rbo_t::unbind()
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{
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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}
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void rbo_t::destroy()
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{
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glDeleteRenderbuffers(1, &rboID);
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}
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void rbo_t::updateStorage(blt::i32 width, blt::i32 height) const
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{
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glRenderbufferStorage(GL_RENDERBUFFER, storage_type, width, height);
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}
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void rbo_t::setStorage(GLuint s_type, blt::i32 width, blt::i32 height)
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{
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storage_type = s_type;
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updateStorage(width, height);
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}
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rbo_t rbo_t::make_render_buffer(GLuint storage_type, blt::i32 width, blt::i32 height)
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{
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rbo_t rbo{};
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rbo.create();
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rbo.bind();
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rbo.setStorage(storage_type, width, height);
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rbo_t::unbind();
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return rbo;
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}
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void fbo_t::create(fbo_t::draw_t type)
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{
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generic_bind_type = static_cast<GLuint>(type);
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glGenFramebuffers(1, &fboID);
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}
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void fbo_t::bind(fbo_draw_t type) const
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void fbo_t::bind(draw_t type) const
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{
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glBindFramebuffer(static_cast<GLuint>(type), fboID);
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}
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@ -36,11 +77,64 @@ namespace blt::gfx
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void fbo_t::destroy()
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{
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glDeleteFramebuffers(1, &fboID);
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for (auto& v : render_buffers)
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v.destroy();
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for (auto* texture : texture_buffers)
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delete texture;
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}
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bool fbo_t::validate()
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{
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return glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE;
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}
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void fbo_t::attachTexture(blt::gfx::texture_gl* texture, attachment_t attachment, int level)
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{
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texture_buffers.push_back(texture);
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glFramebufferTexture2D(generic_bind_type, static_cast<GLuint>(attachment), texture->getBindType(), texture->getTextureID(), level);
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}
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void fbo_t::attachRenderBuffer(rbo_t rbo, fbo_t::attachment_t attachment)
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{
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rbo.bind();
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glFramebufferRenderbuffer(generic_bind_type, static_cast<GLuint>(attachment), GL_RENDERBUFFER, rbo.rboID);
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render_buffers.push_back(rbo);
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}
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void fbo_t::updateBuffersStorage(blt::i32 width, blt::i32 height)
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{
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for (auto& rbo : render_buffers)
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{
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rbo.bind();
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rbo.updateStorage(width, height);
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}
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for (auto& texture : texture_buffers)
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texture->updateSize(width, height);
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}
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fbo_t fbo_t::make_render_texture(blt::i32 width, blt::i32 height)
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{
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fbo_t fbo;
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fbo.create();
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fbo.bind();
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auto* texture = new texture_gl2D(width, height);
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fbo.attachTexture(texture, attachment_t::COLOR0);
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rbo_t depth_rbo;
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depth_rbo.create();
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depth_rbo.bind();
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depth_rbo.setStorage(GL_DEPTH24_STENCIL8, width, height);
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fbo.attachRenderBuffer(depth_rbo, attachment_t::DEPTH_STENCIL);
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if (!fbo_t::validate())
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BLT_ERROR("Failed to create render texture framebuffer!");
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fbo_t::unbind();
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return fbo;
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}
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}
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@ -43,8 +43,7 @@ namespace blt::gfx
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size_ = next_size;
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}
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static_dynamic_array::static_dynamic_array()
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{}
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static_dynamic_array::static_dynamic_array() = default;
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static_dynamic_array::vbo_type& static_dynamic_array::operator[](size_t index)
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{
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@ -143,7 +143,7 @@ namespace blt::gfx
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void loop(void* arg)
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{
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const auto& data = *((const window_data*) arg);
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const auto& data = *((window_data*) arg);
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/* -- Get the current framebuffer size, update the global width/height state, along with OpenGL viewport -- */
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glfwGetFramebufferSize(window_state.window, &window_state.width, &window_state.height);
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glViewport(0, 0, window_state.width, window_state.height);
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@ -156,7 +156,7 @@ namespace blt::gfx
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ImGui::NewFrame();
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/* -- Call user update function -- */
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data.update(window_state.width, window_state.height);
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data.update(data.context, window_state.width, window_state.height);
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/* -- Render the ImGUI frame -- */
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ImGui::Render();
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@ -209,7 +209,7 @@ namespace blt::gfx
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glEnable(GL_MULTISAMPLE);
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/* -- Call User Provided post-window-init function -- */
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data.init();
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data.init(data.context);
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#ifdef __EMSCRIPTEN__
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/*
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