d2f1a496f5
Major refactoring to remove ALL legacy OpenGL immediate mode calls from WEBGL_GAL and replace them with WebGL 2.0/OpenGL ES 3.0 compatible code. Key changes: - Add MVP matrix uniform support (replaces glMatrixMode/glOrtho/glLoadMatrix) - Add matrix math helpers (computeOrthoMatrix, multiplyMatrix4x4, etc.) - Replace glBegin/glEnd/glVertex with vertex manager pattern - Rewrite DrawCursor to use vertex manager and DrawLine() calls - Rewrite DrawBitmap to use vertex manager with SHADER_FONT mode - Replace glEnableClientState with glVertexAttribPointer - Replace glDrawBuffer with glDrawBuffers (WebGL 2.0 API) - Add fullscreen_quad.cpp/h for compositor Present() - Update SHADER class with mat4 uniform support - Add MultiplyMatrix() to vertex_manager for Transform() - Remove all legacy GL stubs from wasm_stubs.cpp Build now completes with FULL_ES3 mode (no LEGACY_GL_EMULATION). Remaining issue: wxWidgets GL library calls glColor3f internally. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
203 lines
7.1 KiB
C
203 lines
7.1 KiB
C
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright The KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* This file is used for including the proper GLEW header for the platform.
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*/
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#ifndef KIGLEW_H_
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#define KIGLEW_H_
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// Pull in the configuration options for wxWidgets
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#include <wx/platform.h>
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#if defined( __EMSCRIPTEN__ )
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// Prevent real GLEW header from being included (Emscripten has one too)
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#ifndef __glew_h__
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#define __glew_h__
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#endif
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// WebGL2/GLES3: Modern shader functions
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// Note: NO legacy GL includes - all rendering uses VBOs/shaders
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#include <GLES3/gl3.h>
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// GLU tesselator - provided by wasm/stubs/glu_wasm_impl.cpp
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#include <GL/glu.h>
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// GLEW compatibility stubs for WebGL
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#define GLEW_OK 0
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#define GLEW_VERSION 1
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#define GLEW_VERSION_1_2 1
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#define GLEW_VERSION_1_3 1
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#define GLEW_VERSION_1_4 1
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#define GLEW_VERSION_1_5 1
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#define GLEW_VERSION_2_0 1
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#define GLEW_VERSION_2_1 1
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#define GLEW_ARB_vertex_array_object 1
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#define GLEW_ARB_vertex_buffer_object 1
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#define GLEW_ARB_framebuffer_object 1
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#define GLEW_EXT_framebuffer_object 1
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#define GLEW_ARB_texture_non_power_of_two 1
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#define GLEW_ARB_copy_buffer 0 // Not available in WebGL 1.0
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#define GLEW_EXT_framebuffer_multisample 0 // Limited in WebGL
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inline int glewInit() { return GLEW_OK; }
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inline const unsigned char* glewGetString(int) { return (const unsigned char*)"WebGL"; }
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inline const char* glewGetErrorString(int) { return ""; }
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inline int glewIsSupported(const char*) { return 1; }
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// VAO functions - available in WebGL2 / OpenGL ES 3.0
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#ifndef GL_VERTEX_ARRAY_BINDING
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#define GL_VERTEX_ARRAY_BINDING 0x85B5
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#endif
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// Geometry shader extensions - not supported in WebGL
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#ifndef GL_GEOMETRY_VERTICES_OUT_EXT
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#define GL_GEOMETRY_VERTICES_OUT_EXT 0x8DDA
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#define GL_GEOMETRY_INPUT_TYPE_EXT 0x8DDB
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#define GL_GEOMETRY_OUTPUT_TYPE_EXT 0x8DDC
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#endif
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// Geometry shader function stub (not supported in WebGL)
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inline void glProgramParameteriEXT(GLuint program, GLenum pname, GLint value) {
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(void)program; (void)pname; (void)value;
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}
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// glMapBuffer family - not available in WebGL 1.0
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// Return nullptr to signal failure, KiCad has RAM-based fallback
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inline void* glMapBuffer(GLenum target, GLenum access) {
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(void)target; (void)access;
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return nullptr;
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}
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inline GLboolean glUnmapBuffer(GLenum target) {
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(void)target;
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return GL_TRUE;
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}
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// Buffer copy - not available in WebGL 1.0, no-op stub
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inline void glCopyBufferSubData(GLenum readTarget, GLenum writeTarget,
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GLintptr readOffset, GLintptr writeOffset,
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GLsizeiptr size) {
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(void)readTarget; (void)writeTarget;
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(void)readOffset; (void)writeOffset; (void)size;
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}
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// EXT framebuffer functions - alias to standard GL ES 2.0 functions
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#ifndef GL_FRAMEBUFFER_EXT
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#define GL_FRAMEBUFFER_EXT GL_FRAMEBUFFER
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#endif
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#ifndef GL_RENDERBUFFER_EXT
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#define GL_RENDERBUFFER_EXT GL_RENDERBUFFER
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#endif
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#ifndef GL_FRAMEBUFFER_COMPLETE_EXT
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#define GL_FRAMEBUFFER_COMPLETE_EXT GL_FRAMEBUFFER_COMPLETE
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#endif
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#define glGenFramebuffersEXT glGenFramebuffers
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#define glDeleteFramebuffersEXT glDeleteFramebuffers
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#define glBindFramebufferEXT glBindFramebuffer
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#define glCheckFramebufferStatusEXT glCheckFramebufferStatus
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#define glFramebufferTexture2DEXT glFramebufferTexture2D
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#define glFramebufferRenderbufferEXT glFramebufferRenderbuffer
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#define glGenRenderbuffersEXT glGenRenderbuffers
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#define glDeleteRenderbuffersEXT glDeleteRenderbuffers
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#define glBindRenderbufferEXT glBindRenderbuffer
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#define glRenderbufferStorageEXT glRenderbufferStorage
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// GL_DEPTH24_STENCIL8 - map to GLES2/WebGL constant
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#ifndef GL_DEPTH24_STENCIL8
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#define GL_DEPTH24_STENCIL8 0x88F0
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#endif
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// GL_DEPTH_STENCIL_ATTACHMENT - WebGL uses separate depth/stencil, but this constant exists
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#ifndef GL_DEPTH_STENCIL_ATTACHMENT
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#define GL_DEPTH_STENCIL_ATTACHMENT 0x821A
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#endif
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// Debug output - not available in WebGL, no-op stubs
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#ifndef GL_DEBUG_OUTPUT
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#define GL_DEBUG_OUTPUT 0x92E0
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#endif
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#ifndef GLchar
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typedef char GLchar;
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#endif
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typedef void (*GLDEBUGPROC)(GLenum source, GLenum type, GLuint id,
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GLenum severity, GLsizei length,
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const GLchar* message, const void* userParam);
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inline void glDebugMessageCallback(GLDEBUGPROC callback, const void* userParam) {
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(void)callback; (void)userParam;
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}
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// GLdouble type (needed for some API signatures)
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#ifndef GLdouble
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typedef double GLdouble;
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#endif
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// Display lists - not supported in WebGL, stub implementations
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inline GLuint glGenLists(GLsizei range) { (void)range; return 0; }
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inline GLboolean glIsList(GLuint list) { (void)list; return GL_FALSE; }
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inline void glNewList(GLuint list, GLenum mode) { (void)list; (void)mode; }
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inline void glEndList(void) {}
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inline void glCallList(GLuint list) { (void)list; }
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inline void glDeleteLists(GLuint list, GLsizei range) { (void)list; (void)range; }
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#elif defined( __unix__ ) and not defined( __APPLE__ )
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#ifdef KICAD_USE_EGL
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#if wxUSE_GLCANVAS_EGL
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// wxWidgets was compiled with the EGL canvas, so use the EGL header for GLEW
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#include <GL/eglew.h>
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#else
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#error "KICAD_USE_EGL can only be used when wxWidgets is compiled with the EGL canvas"
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#endif
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#else // KICAD_USE_EGL
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#if wxUSE_GLCANVAS_EGL
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#error "KICAD_USE_EGL must be defined since wxWidgets has been compiled with the EGL canvas"
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#else
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// wxWidgets wasn't compiled with the EGL canvas, so use the X11 GLEW
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#include <GL/glxew.h>
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#endif
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#endif // KICAD_USE_EGL
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#else // defined( __unix__ ) and not defined( __APPLE__ )
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// Non-GTK platforms only need the normal GLEW include
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#include <GL/glew.h>
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#endif // defined( __unix__ ) and not defined( __APPLE__ )
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#ifdef _WIN32
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#include <GL/wglew.h>
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#endif // _WIN32
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#endif // KIGLEW_H_
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