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OpenGL ES 3.0 for phones without Vulkan; the old-GPU renderer draws the grid; site fonts

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- Android: Vulkan 1.3 if the phone has it, else OpenGL ES 3.0 (the
  fallback renderer, which now also runs on ES); the APK no longer
  needs Vulkan to install
- The fallback renderer draws sprites and streaks: the grid and axes
- The website ships its fonts (Inter, JetBrains Mono): no more falling
  back to whatever the visitor has
- Android: link the log library (GitHub's build)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NMSrd5oe1GpUD7E6d825KP
This commit is contained in:
Nexoniarz 2026-10-19 22:22:55 +02:00
commit 5e84ef0e13
13 changed files with 348 additions and 53 deletions
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21
engine/engine.cpp
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@ -60,7 +60,7 @@ Cvar vid_mode("vid_mode", "0", CVAR_ARCHIVE, "0 = window, 1 = borderless fullscr
Cvar vid_width("vid_width", "1600", CVAR_ARCHIVE, "Window / fullscreen width");
Cvar vid_height("vid_height", "900", CVAR_ARCHIVE, "Window / fullscreen height");
Cvar r_renderer("r_renderer", "vulkan", CVAR_ARCHIVE,
"Graphics API: vulkan, opengl (4.6), or the cut-down fallbacks for old GPUs: opengl40, opengl31 (restart needed)");
"Graphics API: vulkan, opengl (4.6), or the cut-down fallbacks for old GPUs: opengl40, opengl31, gles (OpenGL ES 3.0) (restart needed)");
Cvar hotreload("hotreload", "1", CVAR_ARCHIVE,
"Reload textures, models, sounds, scripts and the map when their files change (with tools/watch.py compiling as you save)");
Cvar fps_max_menu("fps_max_menu", "120", CVAR_ARCHIVE, "Frame rate limit in menus and while paused (0 = same as fps_max)");
@ -283,12 +283,25 @@ int runClient(Game& game) {
const int w = std::max(vid_width.i(), 640), h = std::max(vid_height.i(), 480);
// The API asked for, then the others: the modern pair, then the fallbacks for old GPUs.
const std::string want = r_renderer.str();
const RenderApi first = want == "opengl" ? RenderApi::OpenGL : want == "opengl40" ? RenderApi::OpenGL40 : want == "opengl31" ? RenderApi::OpenGL31 : RenderApi::Vulkan;
// (A phone has only Vulkan and OpenGL ES.)
RenderApi first = want == "opengl" ? RenderApi::OpenGL : want == "opengl40" ? RenderApi::OpenGL40 : want == "opengl31" ? RenderApi::OpenGL31
: want == "gles" ? RenderApi::GLES30 : RenderApi::Vulkan;
#if defined(__ANDROID__)
if (first != RenderApi::Vulkan) first = RenderApi::GLES30;
const std::initializer_list<RenderApi> all{RenderApi::Vulkan, RenderApi::GLES30};
#else
const std::initializer_list<RenderApi> all{RenderApi::Vulkan, RenderApi::OpenGL, RenderApi::OpenGL40, RenderApi::OpenGL31, RenderApi::GLES30};
#endif
std::vector<RenderApi> order{first};
for (RenderApi a : {RenderApi::Vulkan, RenderApi::OpenGL, RenderApi::OpenGL40, RenderApi::OpenGL31})
if (std::find(order.begin(), order.end(), a) == order.end() && (first != RenderApi::OpenGL31 || a == RenderApi::OpenGL31)) order.push_back(a);
for (RenderApi a : all)
if (std::find(order.begin(), order.end(), a) == order.end() && (first != RenderApi::OpenGL31 || a == RenderApi::OpenGL31 || a == RenderApi::GLES30)) order.push_back(a);
bool ok = false;
for (RenderApi api : order) {
if (api == RenderApi::GLES30) { // (before the window: a phone picks its surface's kind when it's made)
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
}
ok = window.init(game.title(), w, h, api != RenderApi::Vulkan) && renderer.init(window, r_validation.b(), api);
if (ok) {
if (api != first)