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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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6
engine/render/backend.h
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@ -19,8 +19,8 @@ namespace keel {
class Window;
using TextureId = uint32_t;
// OpenGL40/OpenGL31: the cut-down fallback for old GPUs (rhi/gl/gl_legacy.cpp).
enum class RenderApi { Vulkan, OpenGL, OpenGL40, OpenGL31 };
// OpenGL40/OpenGL31/GLES30: the cut-down fallback for old GPUs and phones (rhi/gl/gl_legacy.cpp).
enum class RenderApi { Vulkan, OpenGL, OpenGL40, OpenGL31, GLES30 };
// Texture slots. 0 and 1 are created by the renderer; 2-4 are the backend's render targets
// (sampled through the same table); loaded textures start at kFirstTextureSlot.
@ -235,6 +235,6 @@ public:
std::unique_ptr<RenderBackend> createVulkanBackend();
std::unique_ptr<RenderBackend> createOpenGLBackend();
std::unique_ptr<RenderBackend> createLegacyOpenGLBackend(int major, int minor);
std::unique_ptr<RenderBackend> createLegacyOpenGLBackend(int major, int minor, bool es = false);
} // namespace keel