mirror of
https://github.com/RGBCube/serenity
synced 2025-10-26 04:22:07 +00:00
68d9d4e247
This allows WebGL to preserve the clear values as it performs an implicit clear to certain values.
527 lines
22 KiB
C++
527 lines
22 KiB
C++
/*
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* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
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* Copyright (c) 2021-2022, Jesse Buhagiar <jooster669@gmail.com>
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* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/HashMap.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/Optional.h>
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#include <AK/RefPtr.h>
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#include <AK/Tuple.h>
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#include <AK/Variant.h>
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#include <AK/Vector.h>
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#include <LibGL/Tex/NameAllocator.h>
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#include <LibGL/Tex/Texture.h>
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#include <LibGL/Tex/TextureUnit.h>
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#include <LibGPU/Device.h>
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#include <LibGPU/DeviceInfo.h>
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#include <LibGPU/Driver.h>
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#include <LibGPU/Light.h>
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#include <LibGPU/Vertex.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Matrix4x4.h>
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#include <LibGfx/Rect.h>
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#include <LibGfx/Vector3.h>
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namespace GL {
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#define APPEND_TO_CALL_LIST_AND_RETURN_IF_NEEDED(name, ...) \
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if (should_append_to_listing()) { \
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append_to_listing<&GLContext::name>(__VA_ARGS__); \
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if (!should_execute_after_appending_to_listing()) \
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return; \
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}
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#define APPEND_TO_CALL_LIST_WITH_ARG_AND_RETURN_IF_NEEDED(name, arg) \
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if (should_append_to_listing()) { \
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auto ptr = store_in_listing(arg); \
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append_to_listing<&GLContext::name>(*ptr); \
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if (!should_execute_after_appending_to_listing()) \
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return; \
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}
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#define RETURN_WITH_ERROR_IF(condition, error) \
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if (condition) { \
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dbgln_if(GL_DEBUG, "{}(): error {:#x}", __func__, error); \
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if (m_error == GL_NO_ERROR) \
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m_error = error; \
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return; \
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}
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#define RETURN_VALUE_WITH_ERROR_IF(condition, error, return_value) \
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if (condition) { \
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dbgln_if(GL_DEBUG, "{}(): error {:#x}", __func__, error); \
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if (m_error == GL_NO_ERROR) \
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m_error = error; \
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return return_value; \
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}
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constexpr size_t MODELVIEW_MATRIX_STACK_LIMIT = 64;
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constexpr size_t PROJECTION_MATRIX_STACK_LIMIT = 8;
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constexpr size_t TEXTURE_MATRIX_STACK_LIMIT = 8;
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struct ContextParameter {
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GLenum type;
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bool is_capability { false };
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u8 count { 1 };
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union {
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bool boolean_value;
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GLint integer_value;
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GLint integer_list[4];
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GLdouble double_value;
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GLdouble double_list[4];
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} value;
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};
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enum Face {
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Front = 0,
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Back = 1,
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};
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class GLContext final {
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public:
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GLContext(RefPtr<GPU::Driver> driver, NonnullOwnPtr<GPU::Device>, Gfx::Bitmap&);
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~GLContext();
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NonnullRefPtr<Gfx::Bitmap> frontbuffer() const { return m_frontbuffer; };
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void present();
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// Used by WebGL to preserve the clear values when implicitly clearing the front buffer.
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// FIXME: Add ContextParameters for these and expose them through methods such as gl_get_floatv instead of having a public API like this.
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FloatVector4 current_clear_color() const { return m_clear_color; }
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GLdouble current_clear_depth() const { return m_clear_depth; }
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GLint current_clear_stencil() const { return m_clear_stencil; }
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void gl_begin(GLenum mode);
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void gl_clear(GLbitfield mask);
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void gl_clear_color(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
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void gl_clear_depth(GLdouble depth);
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void gl_clear_stencil(GLint s);
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void gl_color(GLdouble r, GLdouble g, GLdouble b, GLdouble a);
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void gl_delete_textures(GLsizei n, GLuint const* textures);
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void gl_end();
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void gl_frustum(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val);
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void gl_gen_textures(GLsizei n, GLuint* textures);
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GLenum gl_get_error();
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GLubyte* gl_get_string(GLenum name);
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void gl_load_identity();
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void gl_load_matrix(FloatMatrix4x4 const& matrix);
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void gl_matrix_mode(GLenum mode);
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void gl_ortho(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val);
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void gl_push_matrix();
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void gl_pop_matrix();
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void gl_mult_matrix(FloatMatrix4x4 const& matrix);
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void gl_rotate(GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
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void gl_scale(GLdouble x, GLdouble y, GLdouble z);
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void gl_translate(GLdouble x, GLdouble y, GLdouble z);
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void gl_vertex(GLdouble x, GLdouble y, GLdouble z, GLdouble w);
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void gl_viewport(GLint x, GLint y, GLsizei width, GLsizei height);
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void gl_enable(GLenum);
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void gl_disable(GLenum);
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GLboolean gl_is_enabled(GLenum);
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void gl_front_face(GLenum);
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void gl_cull_face(GLenum);
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GLuint gl_gen_lists(GLsizei range);
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void gl_call_list(GLuint list);
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void gl_call_lists(GLsizei n, GLenum type, void const* lists);
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void gl_delete_lists(GLuint list, GLsizei range);
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void gl_list_base(GLuint base);
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void gl_end_list(void);
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void gl_new_list(GLuint list, GLenum mode);
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GLboolean gl_is_list(GLuint list);
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void gl_flush();
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void gl_finish();
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void gl_blend_func(GLenum src_factor, GLenum dst_factor);
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void gl_shade_model(GLenum mode);
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void gl_alpha_func(GLenum func, GLclampf ref);
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void gl_hint(GLenum target, GLenum mode);
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void gl_read_buffer(GLenum mode);
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void gl_draw_buffer(GLenum buffer);
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void gl_read_pixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid* pixels);
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void gl_tex_image_2d(GLenum target, GLint level, GLint internal_format, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, GLvoid const* data);
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void gl_tex_sub_image_2d(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid const* data);
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void gl_tex_parameter(GLenum target, GLenum pname, GLfloat param);
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void gl_tex_parameterfv(GLenum target, GLenum pname, GLfloat const* params);
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void gl_tex_coord(GLfloat s, GLfloat t, GLfloat r, GLfloat q);
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void gl_multi_tex_coord(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q);
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void gl_tex_env(GLenum target, GLenum pname, GLfloat param);
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void gl_bind_texture(GLenum target, GLuint texture);
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GLboolean gl_is_texture(GLuint texture);
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void gl_active_texture(GLenum texture);
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void gl_depth_mask(GLboolean flag);
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void gl_enable_client_state(GLenum cap);
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void gl_disable_client_state(GLenum cap);
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void gl_client_active_texture(GLenum target);
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void gl_vertex_pointer(GLint size, GLenum type, GLsizei stride, void const* pointer);
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void gl_color_pointer(GLint size, GLenum type, GLsizei stride, void const* pointer);
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void gl_tex_coord_pointer(GLint size, GLenum type, GLsizei stride, void const* pointer);
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void gl_draw_arrays(GLenum mode, GLint first, GLsizei count);
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void gl_draw_elements(GLenum mode, GLsizei count, GLenum type, void const* indices);
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void gl_draw_pixels(GLsizei width, GLsizei height, GLenum format, GLenum type, void const* data);
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void gl_color_mask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
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void gl_get_booleanv(GLenum pname, GLboolean* data);
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void gl_get_doublev(GLenum pname, GLdouble* params);
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void gl_get_floatv(GLenum pname, GLfloat* params);
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void gl_get_integerv(GLenum pname, GLint* data);
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void gl_depth_range(GLdouble min, GLdouble max);
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void gl_depth_func(GLenum func);
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void gl_polygon_mode(GLenum face, GLenum mode);
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void gl_polygon_offset(GLfloat factor, GLfloat units);
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void gl_fogfv(GLenum pname, GLfloat* params);
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void gl_fogf(GLenum pname, GLfloat param);
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void gl_fogi(GLenum pname, GLint param);
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void gl_pixel_storei(GLenum pname, GLint param);
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void gl_scissor(GLint x, GLint y, GLsizei width, GLsizei height);
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void gl_stencil_func_separate(GLenum face, GLenum func, GLint ref, GLuint mask);
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void gl_stencil_mask_separate(GLenum face, GLuint mask);
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void gl_stencil_op_separate(GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);
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void gl_normal(GLfloat nx, GLfloat ny, GLfloat nz);
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void gl_normal_pointer(GLenum type, GLsizei stride, void const* pointer);
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void gl_raster_pos(GLfloat x, GLfloat y, GLfloat z, GLfloat w);
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void gl_line_width(GLfloat width);
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void gl_push_attrib(GLbitfield mask);
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void gl_pop_attrib();
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void gl_light_model(GLenum pname, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
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void gl_bitmap(GLsizei width, GLsizei height, GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove, GLubyte const* bitmap);
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void gl_copy_tex_image_2d(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
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void gl_get_tex_parameter_integerv(GLenum target, GLint level, GLenum pname, GLint* params);
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void gl_rect(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2);
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void gl_tex_gen(GLenum coord, GLenum pname, GLint param);
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void gl_tex_gen_floatv(GLenum coord, GLenum pname, GLfloat const* params);
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void gl_lightf(GLenum light, GLenum pname, GLfloat param);
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void gl_lightfv(GLenum light, GLenum pname, GLfloat const* params);
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void gl_lightiv(GLenum light, GLenum pname, GLint const* params);
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void gl_materialf(GLenum face, GLenum pname, GLfloat param);
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void gl_materialfv(GLenum face, GLenum pname, GLfloat const* params);
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void gl_materialiv(GLenum face, GLenum pname, GLint const* params);
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void gl_color_material(GLenum face, GLenum mode);
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void gl_get_light(GLenum light, GLenum pname, void* params, GLenum type);
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void gl_get_material(GLenum face, GLenum pname, void* params, GLenum type);
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void gl_clip_plane(GLenum plane, GLdouble const* equation);
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void gl_get_clip_plane(GLenum plane, GLdouble* equation);
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void gl_array_element(GLint i);
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void gl_copy_tex_sub_image_2d(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
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void gl_point_size(GLfloat size);
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private:
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void sync_device_config();
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void sync_device_sampler_config();
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void sync_device_texcoord_config();
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void sync_light_state();
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void sync_stencil_configuration();
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void sync_clip_planes();
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void build_extension_string();
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template<typename T>
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T* store_in_listing(T value)
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{
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VERIFY(m_current_listing_index.has_value());
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auto& listing = m_current_listing_index->listing;
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listing.saved_arguments.empend(make<Listing::ExtraSavedArguments>(move(value)));
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return listing.saved_arguments.last()->template get_pointer<T>();
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}
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template<auto member, typename... Args>
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void append_to_listing(Args&&... args)
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{
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VERIFY(m_current_listing_index.has_value());
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m_current_listing_index->listing.entries.empend(member, Listing::ArgumentsFor<member> { forward<Args>(args)... });
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}
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Optional<ContextParameter> get_context_parameter(GLenum pname);
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template<typename T>
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void get_floating_point(GLenum pname, T* params);
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template<typename T>
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void get_light_param(GLenum light, GLenum pname, T* params);
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template<typename T>
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void get_material_param(Face face, GLenum pname, T* params);
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void invoke_list(size_t list_index);
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[[nodiscard]] bool should_append_to_listing() const { return m_current_listing_index.has_value(); }
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[[nodiscard]] bool should_execute_after_appending_to_listing() const { return m_current_listing_index.has_value() && m_current_listing_index->mode == GL_COMPILE_AND_EXECUTE; }
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GLenum m_current_draw_mode;
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GLenum m_current_matrix_mode { GL_MODELVIEW };
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FloatMatrix4x4 m_projection_matrix { FloatMatrix4x4::identity() };
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FloatMatrix4x4 m_model_view_matrix { FloatMatrix4x4::identity() };
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FloatMatrix4x4 m_texture_matrix { FloatMatrix4x4::identity() };
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FloatMatrix4x4* m_current_matrix { &m_model_view_matrix };
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Vector<FloatMatrix4x4> m_projection_matrix_stack;
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Vector<FloatMatrix4x4> m_model_view_matrix_stack;
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// FIXME: implement multi-texturing: the texture matrix stack should live inside a texture unit
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Vector<FloatMatrix4x4> m_texture_matrix_stack;
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Vector<FloatMatrix4x4>* m_current_matrix_stack { &m_model_view_matrix_stack };
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Gfx::IntRect m_viewport;
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FloatVector4 m_clear_color { 0.0f, 0.0f, 0.0f, 0.0f };
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float m_clear_depth { 1.f };
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u8 m_clear_stencil { 0 };
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FloatVector4 m_current_vertex_color { 1.0f, 1.0f, 1.0f, 1.0f };
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Vector<FloatVector4> m_current_vertex_tex_coord;
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FloatVector3 m_current_vertex_normal { 0.0f, 0.0f, 1.0f };
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Vector<GPU::Vertex> m_vertex_list;
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GLenum m_error = GL_NO_ERROR;
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bool m_in_draw_state = false;
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bool m_depth_test_enabled { false };
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bool m_depth_offset_enabled { false };
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bool m_cull_faces = false;
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GLenum m_front_face = GL_CCW;
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GLenum m_culled_sides = GL_BACK;
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bool m_blend_enabled = false;
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GLenum m_blend_source_factor = GL_ONE;
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GLenum m_blend_destination_factor = GL_ZERO;
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bool m_alpha_test_enabled = false;
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GLenum m_alpha_test_func = GL_ALWAYS;
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GLclampf m_alpha_test_ref_value = 0;
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bool m_dither_enabled { true };
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bool m_normalize { false };
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// Stencil configuration
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bool m_stencil_test_enabled { false };
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bool m_stencil_configuration_dirty { true };
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struct StencilFunctionOptions {
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GLenum func { GL_ALWAYS };
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GLint reference_value { 0 };
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GLuint mask { NumericLimits<GLuint>::max() };
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};
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Array<StencilFunctionOptions, 2u> m_stencil_function;
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struct StencilOperationOptions {
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GLenum op_fail { GL_KEEP };
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GLenum op_depth_fail { GL_KEEP };
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GLenum op_pass { GL_KEEP };
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GLuint write_mask { NumericLimits<GLuint>::max() };
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};
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Array<StencilOperationOptions, 2u> m_stencil_operation;
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GLenum m_current_read_buffer = GL_BACK;
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GLenum m_current_draw_buffer = GL_BACK;
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// User-defined clip planes
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struct ClipPlaneAttributes {
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Array<FloatVector4, 6> eye_clip_plane; // TODO: Change to use device-defined constant
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GLuint enabled { 0 };
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} m_clip_plane_attributes;
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bool m_clip_planes_dirty { true };
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// Client side arrays
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bool m_client_side_vertex_array_enabled { false };
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bool m_client_side_color_array_enabled { false };
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Vector<bool> m_client_side_texture_coord_array_enabled;
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size_t m_client_active_texture = 0;
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bool m_client_side_normal_array_enabled { false };
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NonnullRefPtr<Gfx::Bitmap> m_frontbuffer;
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// Texture objects
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template<typename T>
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RefPtr<T> get_default_texture(GLenum target)
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{
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auto default_texture = m_default_textures.get(target);
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VERIFY(default_texture.has_value());
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return static_cast<T*>(default_texture.value());
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}
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TextureNameAllocator m_name_allocator;
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HashMap<GLuint, RefPtr<Texture>> m_allocated_textures;
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HashMap<GLenum, RefPtr<Texture>> m_default_textures;
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Vector<TextureUnit> m_texture_units;
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TextureUnit* m_active_texture_unit;
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size_t m_active_texture_unit_index { 0 };
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// Texture coordinate generation state
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struct TextureCoordinateGeneration {
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bool enabled { false };
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GLenum generation_mode { GL_EYE_LINEAR };
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FloatVector4 object_plane_coefficients { 0.0f, 0.0f, 0.0f, 0.0f };
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FloatVector4 eye_plane_coefficients { 0.0f, 0.0f, 0.0f, 0.0f };
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};
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Vector<Array<TextureCoordinateGeneration, 4>> m_texture_coordinate_generation;
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bool m_texcoord_generation_dirty { true };
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ALWAYS_INLINE TextureCoordinateGeneration& texture_coordinate_generation(size_t texture_unit, GLenum capability)
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{
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return m_texture_coordinate_generation[texture_unit][capability - GL_TEXTURE_GEN_S];
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}
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RefPtr<GPU::Driver> m_driver;
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NonnullOwnPtr<GPU::Device> m_rasterizer;
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GPU::DeviceInfo const m_device_info;
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bool m_sampler_config_is_dirty { true };
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bool m_light_state_is_dirty { true };
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struct Listing {
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template<typename F>
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struct TupleTypeForArgumentListOf_;
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template<typename Ret, typename C, typename... Args>
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struct TupleTypeForArgumentListOf_<Ret (C::*)(Args...)> {
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using Type = Tuple<Args...>;
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};
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template<typename F>
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using TupleTypeForArgumentListOf = typename TupleTypeForArgumentListOf_<F>::Type;
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template<auto member>
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using ArgumentsFor = TupleTypeForArgumentListOf<decltype(member)>;
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template<typename... Fns>
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struct FunctionAndArgs {
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Variant<Fns...> function;
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Variant<TupleTypeForArgumentListOf<Fns>...> arguments;
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};
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using FunctionsAndArgs = FunctionAndArgs<
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decltype(&GLContext::gl_begin),
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decltype(&GLContext::gl_clear),
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decltype(&GLContext::gl_clear_color),
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decltype(&GLContext::gl_clear_depth),
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decltype(&GLContext::gl_clear_stencil),
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decltype(&GLContext::gl_color),
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decltype(&GLContext::gl_end),
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decltype(&GLContext::gl_frustum),
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decltype(&GLContext::gl_load_identity),
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decltype(&GLContext::gl_load_matrix),
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decltype(&GLContext::gl_matrix_mode),
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decltype(&GLContext::gl_ortho),
|
|
decltype(&GLContext::gl_push_matrix),
|
|
decltype(&GLContext::gl_pop_matrix),
|
|
decltype(&GLContext::gl_mult_matrix),
|
|
decltype(&GLContext::gl_rotate),
|
|
decltype(&GLContext::gl_scale),
|
|
decltype(&GLContext::gl_translate),
|
|
decltype(&GLContext::gl_vertex),
|
|
decltype(&GLContext::gl_viewport),
|
|
decltype(&GLContext::gl_enable),
|
|
decltype(&GLContext::gl_disable),
|
|
decltype(&GLContext::gl_front_face),
|
|
decltype(&GLContext::gl_cull_face),
|
|
decltype(&GLContext::gl_call_list),
|
|
decltype(&GLContext::gl_call_lists),
|
|
decltype(&GLContext::gl_blend_func),
|
|
decltype(&GLContext::gl_shade_model),
|
|
decltype(&GLContext::gl_alpha_func),
|
|
decltype(&GLContext::gl_hint),
|
|
decltype(&GLContext::gl_read_buffer),
|
|
decltype(&GLContext::gl_tex_parameter),
|
|
decltype(&GLContext::gl_tex_parameterfv),
|
|
decltype(&GLContext::gl_depth_mask),
|
|
decltype(&GLContext::gl_draw_arrays),
|
|
decltype(&GLContext::gl_draw_elements),
|
|
decltype(&GLContext::gl_draw_pixels),
|
|
decltype(&GLContext::gl_depth_range),
|
|
decltype(&GLContext::gl_polygon_offset),
|
|
decltype(&GLContext::gl_scissor),
|
|
decltype(&GLContext::gl_stencil_func_separate),
|
|
decltype(&GLContext::gl_stencil_mask_separate),
|
|
decltype(&GLContext::gl_stencil_op_separate),
|
|
decltype(&GLContext::gl_normal),
|
|
decltype(&GLContext::gl_raster_pos),
|
|
decltype(&GLContext::gl_line_width),
|
|
decltype(&GLContext::gl_push_attrib),
|
|
decltype(&GLContext::gl_pop_attrib),
|
|
decltype(&GLContext::gl_light_model),
|
|
decltype(&GLContext::gl_bitmap),
|
|
decltype(&GLContext::gl_copy_tex_image_2d),
|
|
decltype(&GLContext::gl_rect),
|
|
decltype(&GLContext::gl_tex_gen),
|
|
decltype(&GLContext::gl_tex_gen_floatv),
|
|
decltype(&GLContext::gl_fogf),
|
|
decltype(&GLContext::gl_fogfv),
|
|
decltype(&GLContext::gl_fogi),
|
|
decltype(&GLContext::gl_lightf),
|
|
decltype(&GLContext::gl_lightfv),
|
|
decltype(&GLContext::gl_lightiv),
|
|
decltype(&GLContext::gl_materialf),
|
|
decltype(&GLContext::gl_materialfv),
|
|
decltype(&GLContext::gl_materialiv),
|
|
decltype(&GLContext::gl_color_material),
|
|
decltype(&GLContext::gl_get_light),
|
|
decltype(&GLContext::gl_clip_plane),
|
|
decltype(&GLContext::gl_array_element),
|
|
decltype(&GLContext::gl_copy_tex_sub_image_2d),
|
|
decltype(&GLContext::gl_point_size)>;
|
|
|
|
using ExtraSavedArguments = Variant<
|
|
FloatMatrix4x4>;
|
|
|
|
Vector<NonnullOwnPtr<ExtraSavedArguments>> saved_arguments;
|
|
Vector<FunctionsAndArgs> entries;
|
|
};
|
|
|
|
static constexpr size_t max_allowed_gl_call_depth { 128 };
|
|
size_t m_gl_call_depth { 0 };
|
|
Vector<Listing> m_listings;
|
|
size_t m_list_base { 0 };
|
|
struct CurrentListing {
|
|
Listing listing;
|
|
size_t index { 0 };
|
|
GLenum mode { GL_COMPILE };
|
|
};
|
|
Optional<CurrentListing> m_current_listing_index;
|
|
|
|
struct VertexAttribPointer {
|
|
GLint size { 4 };
|
|
GLenum type { GL_FLOAT };
|
|
bool normalize { true };
|
|
GLsizei stride { 0 };
|
|
void const* pointer { 0 };
|
|
};
|
|
|
|
static void read_from_vertex_attribute_pointer(VertexAttribPointer const&, int index, float* elements);
|
|
|
|
VertexAttribPointer m_client_vertex_pointer;
|
|
VertexAttribPointer m_client_color_pointer;
|
|
Vector<VertexAttribPointer> m_client_tex_coord_pointer;
|
|
VertexAttribPointer m_client_normal_pointer;
|
|
|
|
u8 m_pack_alignment { 4 };
|
|
GLsizei m_unpack_row_length { 0 };
|
|
u8 m_unpack_alignment { 4 };
|
|
|
|
// Point drawing configuration
|
|
bool m_point_smooth { false };
|
|
float m_point_size { 1.f };
|
|
|
|
// Line drawing configuration
|
|
bool m_line_smooth { false };
|
|
float m_line_width { 1.f };
|
|
|
|
// Lighting configuration
|
|
bool m_lighting_enabled { false };
|
|
Vector<GPU::Light> m_light_states;
|
|
Array<GPU::Material, 2u> m_material_states;
|
|
|
|
// Color material
|
|
bool m_color_material_enabled { false };
|
|
GLenum m_color_material_face { GL_FRONT_AND_BACK };
|
|
GLenum m_color_material_mode { GL_AMBIENT_AND_DIFFUSE };
|
|
|
|
// GL Extension string
|
|
String m_extensions;
|
|
};
|
|
|
|
NonnullOwnPtr<GLContext> create_context(Gfx::Bitmap&);
|
|
void make_context_current(GLContext*);
|
|
void present_context(GLContext*);
|
|
|
|
}
|