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preparation for metal implementation
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| Original file line number | Diff line number | Diff line change |
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| /** | ||
| \file opengl_check.h | ||
| */ | ||
| #pragma once | ||
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| bool check_glerror(const char *cmd); | ||
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| #if defined(NDEBUG) | ||
| #define CHK(cmd) cmd | ||
| #else | ||
| #define CHK(cmd) \ | ||
| do \ | ||
| { \ | ||
| cmd; \ | ||
| while (check_glerror(#cmd)) \ | ||
| { \ | ||
| } \ | ||
| } while (false) | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
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| /** | ||
| \file renderpass.h | ||
| */ | ||
| #pragma once | ||
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| #include "linalg.h" | ||
| #include <unordered_map> | ||
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| using namespace linalg::aliases; | ||
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| /// An abstraction for rendering passes that work with OpenGL, OpenGL ES, and Metal. | ||
| /* | ||
| This is a greatly simplified version of NanoGUI's RenderPass class. Original copyright follows. | ||
| ---------- | ||
| NanoGUI was developed by Wenzel Jakob <[email protected]>. | ||
| The widget drawing code is based on the NanoVG demo application | ||
| by Mikko Mononen. | ||
| All rights reserved. Use of this source code is governed by a | ||
| BSD-style license that can be found in the LICENSE.txt file. | ||
| */ | ||
| class RenderPass | ||
| { | ||
| public: | ||
| /// Depth test | ||
| enum class DepthTest | ||
| { | ||
| Never, | ||
| Less, | ||
| Equal, | ||
| LessEqual, | ||
| Greater, | ||
| NotEqual, | ||
| GreaterEqual, | ||
| Always | ||
| }; | ||
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| /// Culling mode | ||
| enum class CullMode | ||
| { | ||
| Disabled, | ||
| Front, | ||
| Back | ||
| }; | ||
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| /** | ||
| * Create a new render pass for rendering to the main color and (optionally) depth buffer. | ||
| * | ||
| * \param write_depth | ||
| * Should we write to the depth buffer? | ||
| * | ||
| * \param clear | ||
| * Should \ref enter() begin by clearing all buffers? | ||
| */ | ||
| RenderPass(bool write_depth = true, bool clear = true); | ||
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| ~RenderPass(); | ||
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| /** | ||
| * Begin the render pass | ||
| * | ||
| * The specified drawing state (e.g. depth tests, culling mode, blending mode) are automatically set up at this | ||
| * point. Later changes between \ref begin() and \ref end() are possible but cause additional OpenGL/GLES/Metal API | ||
| * calls. | ||
| */ | ||
| void begin(); | ||
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| /// Finish the render pass | ||
| void end(); | ||
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| /// Return the clear color for a given color attachment | ||
| const float4 &clear_color() const | ||
| { | ||
| return m_clear_color; | ||
| } | ||
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| /// Set the clear color for a given color attachment | ||
| void set_clear_color(const float4 &color); | ||
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| /// Return the clear depth for the depth attachment | ||
| float clear_depth() const | ||
| { | ||
| return m_clear_depth; | ||
| } | ||
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| /// Set the clear depth for the depth attachment | ||
| void set_clear_depth(float depth); | ||
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| /// Specify the depth test and depth write mask of this render pass | ||
| void set_depth_test(DepthTest depth_test, bool depth_write); | ||
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| /// Return the depth test and depth write mask of this render pass | ||
| std::pair<DepthTest, bool> depth_test() const | ||
| { | ||
| return {m_depth_test, m_depth_write}; | ||
| } | ||
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| /// Set the pixel offset and size of the viewport region | ||
| void set_viewport(const int2 &offset, const int2 &size); | ||
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| /// Return the pixel offset and size of the viewport region | ||
| std::pair<int2, int2> viewport() | ||
| { | ||
| return {m_viewport_offset, m_viewport_size}; | ||
| } | ||
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| /// Specify the culling mode associated with the render pass | ||
| void set_cull_mode(CullMode mode); | ||
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| /// Return the culling mode associated with the render pass | ||
| CullMode cull_mode() const | ||
| { | ||
| return m_cull_mode; | ||
| } | ||
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| /// Resize all texture targets attached to the render pass | ||
| void resize(const int2 &size); | ||
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| #if defined(HELLOIMGUI_HAS_METAL) | ||
| void *command_encoder() const | ||
| { | ||
| return m_command_encoder; | ||
| } | ||
| void *command_buffer() const | ||
| { | ||
| return m_command_buffer; | ||
| } | ||
| #endif | ||
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| protected: | ||
| bool m_clear; | ||
| float4 m_clear_color; | ||
| float m_clear_depth; | ||
| int2 m_viewport_offset; | ||
| int2 m_viewport_size; | ||
| int2 m_framebuffer_size; | ||
| DepthTest m_depth_test; | ||
| bool m_depth_write; | ||
| CullMode m_cull_mode; | ||
| bool m_active; | ||
| #if defined(HELLOIMGUI_HAS_OPENGL) | ||
| int4 m_viewport_backup, m_scissor_backup; | ||
| bool m_depth_test_backup; | ||
| bool m_depth_write_backup; | ||
| bool m_scissor_test_backup; | ||
| bool m_cull_face_backup; | ||
| bool m_blend_backup; | ||
| #elif defined(HELLOIMGUI_HAS_METAL) | ||
| void *m_command_buffer; | ||
| void *m_command_encoder; | ||
| void *m_pass_descriptor; | ||
| // ref<Shader> m_clear_shader; | ||
| #endif | ||
| }; |
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