2 commits

Author	SHA1	Message	Date
John McCardle	e08f189d60	Fix Text shader and RenderTexture viewport for SDL2 backend ... Text rendering fix: - Add ShaderType parameter to drawTriangles() to allow explicit shader selection - Text::draw() now properly uses text shader (alpha-only sampling) - Previously drawTriangles() always overrode to sprite shader RenderTexture fix: - Add pushRenderState/popRenderState to save/restore viewport and projection - RenderTexture::clear() now sets viewport/projection to FBO dimensions - RenderTexture::display() restores previous state - This fixes grid rendering which uses RenderTexture for tile chunks Co-Authored-By: Claude <noreply@anthropic.com>	2026-01-31 12:42:12 -05:00
John McCardle	c5cc022aa2	Add SDL2+OpenGL ES 2 renderer backend for Emscripten/WebGL ... Implements Phase 1 of renderer abstraction plan: - SDL2Types.h: SFML-compatible type stubs in sf:: namespace - SDL2Renderer.h/cpp: OpenGL ES 2 rendering implementation - EmscriptenStubs.cpp: Stubs for missing POSIX functions (wait3, wait4, wcsftime) Build system changes: - Add MCRF_SDL2 compile-time backend selection - Add Emscripten SDL2 link options (-sUSE_SDL=2, -sFULL_ES2=1) - Fix LONG_BIT mismatch for Emscripten in pyport.h Code changes for SDL2/headless compatibility: - Guard ImGui includes with !MCRF_HEADLESS && !MCRF_SDL2 - Defer GL shader initialization until after context creation Current status: Python runs in browser, rendering WIP (canvas sizing issues) Build commands: emcmake cmake -DMCRF_SDL2=ON -B build-emscripten emmake make -C build-emscripten Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-31 11:13:15 -05:00