071eef5454
wasm/gl1: the GL1.x fixed-function emulation layer replacing the gl_ffp_stub.c no-ops in the 3d-regression harness link. This batch: - symbol split: 52 FFP-only entry points implemented; 10 Emscripten-owned names intercepted via wasm-ld --wrap (sources.txt/wrapped_symbols.txt are the shared manifests for both link sites; production hookup lands in M7) - matrix stacks (MODELVIEW/PROJECTION, glGetFloatv readback), immediate mode with all 8 GL1 primitive conversions, GL1-default state mirror - full GL 1.5 Gouraud lighting uber-shader (eye-space light capture at glLightfv time, color-material, two-side, COMBINE evaluator + alpha test wired but inert until M3/M5) - draw routing: FFP traffic identified by GL_VERTEX_ARRAY client state; blit/2D-GAL draws pass through untouched - display lists: correct glGenLists/glIsList existing-empty semantics; recorder itself is M3 (recorded commands drop with a one-time warning) Parity: 20/47 under the 0.02 floor, of which 12 verified genuinely rendering (bg-gradient x2, bounding-box, half-open-cylinder, segment x2, material x3, light x3 — eyeballed against baselines); the other 8 are small-geometry scenarios whose missing GLU/display-list content sits under the floor (become real in M3/M4). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
106 lines
2.5 KiB
C++
106 lines
2.5 KiB
C++
/*
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* gl1_matrix — GL_MODELVIEW / GL_PROJECTION matrix stacks.
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*
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* Only the operations the KiCad 3D renderer uses exist (no glOrtho/glFrustum/
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* glMultMatrix — projection and view arrive prebuilt via glLoadMatrixf, and
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* gluPerspective covers the gizmo). glGetFloatv(GL_MODELVIEW_MATRIX/
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* GL_PROJECTION_MATRIX) readback is served from these stacks by the
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* __wrap_glGetFloatv interceptor.
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*/
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#include "gl1_shim.h"
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#include <glm/gtc/matrix_transform.hpp>
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#include <glm/gtc/type_ptr.hpp>
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namespace gl1
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{
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// GL 1.5 minimums; KiCad never goes deeper than a few levels.
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static constexpr size_t MV_STACK_MAX = 64;
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static constexpr size_t PROJ_STACK_MAX = 8;
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void matrixLoadIdentity()
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{
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S().currentTop() = glm::mat4( 1.0f );
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S().matricesDirty = true;
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}
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void matrixLoadf( const GLfloat* m )
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{
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S().currentTop() = glm::make_mat4( m );
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S().matricesDirty = true;
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}
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void matrixPush()
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{
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State& s = S();
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auto& stack = s.currentStack();
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const size_t maxDepth = ( s.matrixMode == GL_PROJECTION ) ? PROJ_STACK_MAX : MV_STACK_MAX;
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if( stack.size() >= maxDepth )
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{
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GL1_WARN_ONCE( "glPushMatrix: stack overflow (mode 0x%x)", s.matrixMode );
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return;
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}
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stack.push_back( stack.back() );
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}
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void matrixPop()
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{
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State& s = S();
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auto& stack = s.currentStack();
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if( stack.size() <= 1 )
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{
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GL1_WARN_ONCE( "glPopMatrix: stack underflow (mode 0x%x)", s.matrixMode );
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return;
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}
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stack.pop_back();
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s.matricesDirty = true;
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}
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void matrixTranslate( float x, float y, float z )
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{
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glm::mat4& top = S().currentTop();
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top = glm::translate( top, glm::vec3( x, y, z ) );
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S().matricesDirty = true;
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}
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void matrixRotate( float angleDeg, float x, float y, float z )
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{
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glm::mat4& top = S().currentTop();
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top = glm::rotate( top, glm::radians( angleDeg ), glm::vec3( x, y, z ) );
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S().matricesDirty = true;
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}
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void matrixScale( float x, float y, float z )
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{
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glm::mat4& top = S().currentTop();
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top = glm::scale( top, glm::vec3( x, y, z ) );
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S().matricesDirty = true;
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}
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void matrixPerspective( double fovyDeg, double aspect, double zNear, double zFar )
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{
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// gluPerspective multiplies onto the current matrix (KiCad calls it right
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// after glLoadIdentity on GL_PROJECTION, but multiply is the GLU semantic).
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glm::mat4 p = glm::perspective( glm::radians( (float) fovyDeg ), (float) aspect,
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(float) zNear, (float) zFar );
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glm::mat4& top = S().currentTop();
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top = top * p;
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S().matricesDirty = true;
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}
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} // namespace gl1
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