portersky
5ec8cfc735
Add cbt/gfx layer (pipeline + render_target) inspired by Sokol but C++-friendly with RAII and pipeline_desc. Supports building full graphics pipelines (VS/IA/raster/PS/OM), render-to-texture (FBO), and post-processing steps (scene -> RT -> fullscreen quad with sampler + vignette). - Depth/state/viewport/texture cleanup for reliable scene switching. - Updated cube/sphere to demonstrate (sphere uses RT+post). - Vulkan backend easy via PIMPL in impl (same public API). - Fixed depth test, viewport restore, and state leakage on switch. Followed coding conventions (snake_case, trailing returns, east const, include order, no ; after ns/class, etc.).
82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include <span>
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#include <vector>
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#include "glm/glm.hpp"
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namespace cbt::gfx {
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enum class primitive_type {
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triangles
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};
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enum class index_type {
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uint16,
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uint32
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};
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struct attribute_desc {
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std::uint32_t location = 0;
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std::uint32_t num_components = 3;
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std::uint32_t offset = 0;
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};
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struct pipeline_desc {
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std::span<std::byte const> vertex_data{};
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std::span<std::byte const> index_data{};
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std::vector<attribute_desc> attributes{};
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std::uint32_t vertex_stride = 0;
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char const* vertex_shader_src = nullptr;
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char const* fragment_shader_src = nullptr;
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bool depth_test = true;
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primitive_type primitive = primitive_type::triangles;
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index_type index_type_ = index_type::uint32;
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};
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class pipeline {
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public:
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pipeline();
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explicit pipeline(pipeline_desc const& desc);
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pipeline(pipeline const&) = delete;
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pipeline(pipeline&& other) noexcept;
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auto operator=(pipeline const&) -> pipeline& = delete;
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auto operator=(pipeline&& other) noexcept -> pipeline&;
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~pipeline();
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auto valid() const -> bool;
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auto draw(glm::mat4 const& model, glm::mat4 const& view, glm::mat4 const& proj) const -> void;
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auto bind_texture(char const* sampler_name, std::uint32_t texture_id, std::uint32_t unit = 0) const -> void;
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private:
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struct impl;
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std::unique_ptr<impl> m_impl;
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};
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class render_target {
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public:
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explicit render_target(int width, int height);
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render_target(render_target const&) = delete;
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render_target(render_target&& other) noexcept;
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auto operator=(render_target const&) -> render_target& = delete;
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auto operator=(render_target&& other) noexcept -> render_target&;
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~render_target();
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auto bind() const -> void;
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auto unbind() const -> void;
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auto color_id() const -> std::uint32_t;
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auto width() const -> int;
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auto height() const -> int;
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auto valid() const -> bool;
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auto resize(int width, int height) -> void;
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private:
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struct impl;
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std::unique_ptr<impl> m_impl;
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};
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} // namespace cbt::gfx
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