import type { GlRenderState, GlRenderTarget, Matrix, RenderProxy2D, RenderTargetAxes, RenderTargetColorSpace, RenderTargetDescriptor, RenderTargetExplanation, RenderTargetFormat, RenderTargetFormatPolicy } from '@flighthq/types/contract';
/**
 * Allocates a render target realizing `descriptor`'s axes (format, MSAA sampleCount, MRT
 * colorAttachments, depth). The framebuffer is bound during creation but the previous binding is
 * restored before returning.
 */
export declare function createGlRenderTarget(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>): GlRenderTarget;
export declare function createGlRenderTarget(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>, formatPolicy: 'preferred'): GlRenderTarget;
export declare function createGlRenderTarget(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>, formatPolicy: 'required'): GlRenderTarget | null;
export declare function createGlRenderTarget(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>, formatPolicy: RenderTargetFormatPolicy): GlRenderTarget | null;
export declare function declareGlRenderTargetColorSpace(state: GlRenderState, colorSpace: RenderTargetColorSpace): boolean;
/** Deletes the GL resources owned by `target`. The target object must not be used after this call. */
export declare function destroyGlRenderTarget(state: GlRenderState, target: GlRenderTarget): void;
/**
 * Composites `target`'s texture onto the current framebuffer as a positioned quad, using
 * `renderProxy`'s world transform and alpha. `transform` maps the target's pixel space into the
 * node's local space (as produced by `computeRenderCacheTransform`).
 *
 * Render-target textures are stored with GL's bottom-left origin, so the quad's V coordinates are
 * flipped (`v0=1, v1=0`) so the result composites upright.
 */
export declare function drawGlRenderTargetResult(state: GlRenderState, renderProxy: RenderProxy2D, target: Readonly<GlRenderTarget>, transform: Readonly<Matrix>): void;
export declare function explainGlRenderTarget(target: Readonly<GlRenderTarget>): RenderTargetExplanation;
export declare function isGlRenderTargetFormatSupported(state: GlRenderState, format: RenderTargetFormat): boolean;
/** Reallocates the storage backing `target` to the new pixel dimensions, preserving its axes. */
export declare function resizeGlRenderTarget(state: GlRenderState, target: GlRenderTarget, width: number, height: number): void;
/**
 * Resolves an MSAA target's multisample framebuffer into its single-sample resolve texture(s) via
 * blitFramebuffer. No-op when sampleCount === 1. Call after the scene is drawn into the target and
 * before sampling `target.texture`/`target.textures`.
 */
export declare function resolveGlRenderTarget(state: GlRenderState, target: GlRenderTarget): void;
export declare function resolveGlRenderTargetAxes(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>): RenderTargetAxes;
export declare function resolveGlRenderTargetAxes(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>, formatPolicy: 'preferred'): RenderTargetAxes;
export declare function resolveGlRenderTargetAxes(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>, formatPolicy: 'required'): RenderTargetAxes | null;
export declare function resolveGlRenderTargetAxes(state: GlRenderState, descriptor: Readonly<RenderTargetDescriptor>, formatPolicy: RenderTargetFormatPolicy): RenderTargetAxes | null;
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