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>
97 lines
2.8 KiB
C++
97 lines
2.8 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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* @file fullscreen_quad.h
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* @brief VBO-based fullscreen quad for WebGL texture compositing.
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* Replaces legacy GL immediate mode (glBegin/glVertex/glEnd).
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*/
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#ifndef FULLSCREEN_QUAD_H_
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#define FULLSCREEN_QUAD_H_
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#include "kiglew.h"
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namespace KIGFX
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{
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/**
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* A VBO-based fullscreen quad for drawing textures to the screen.
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* Used by compositor and antialiasing passes.
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*/
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class FULLSCREEN_QUAD
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{
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public:
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FULLSCREEN_QUAD();
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~FULLSCREEN_QUAD();
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/**
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* Initialize the VBO and VAO. Must be called after GL context is created.
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*/
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void Initialize();
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/**
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* Draw the fullscreen quad. Assumes a shader is already bound.
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* The shader must have:
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* - a_vertex (location 0): vec4 position
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* - a_texCoord0 (location 1): vec4 texture coordinates
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*/
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void Draw();
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/**
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* Draw a fullscreen triangle (more efficient than quad for some GPUs).
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* Uses an oversized triangle that covers the entire screen.
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*/
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void DrawTriangle();
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/**
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* Check if initialized.
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*/
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bool IsInitialized() const { return m_initialized; }
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/**
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* Clean up GL resources.
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*/
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void Cleanup();
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// Attribute locations used by the fullscreen quad
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static const GLuint VERTEX_ATTRIB_LOC = 0;
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static const GLuint TEXCOORD_ATTRIB_LOC = 1;
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private:
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bool m_initialized;
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GLuint m_quadVBO; ///< VBO for quad vertices (6 vertices, 2 triangles)
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GLuint m_quadVAO; ///< VAO for quad
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GLuint m_triangleVBO; ///< VBO for single oversized triangle
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GLuint m_triangleVAO; ///< VAO for triangle
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};
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/**
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* Get the global fullscreen quad instance.
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* This is lazily initialized on first use.
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*/
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FULLSCREEN_QUAD& GetFullscreenQuad();
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} // namespace KIGFX
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#endif /* FULLSCREEN_QUAD_H_ */
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