src/gallium/drivers/llvmpipe/lp_limits.h

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/**
 * Implementation limits for LLVMpipe driver.
 */

#ifndef LP_LIMITS_H
#define LP_LIMITS_H


/**
 * Tile size (width and height). This needs to be a power of two.
 */
#define TILE_ORDER 6
#define TILE_SIZE (1 << TILE_ORDER)


/**
 * Max texture sizes
 */
/**
 * 2GB is the actual max currently (we always use 32bit offsets, and both
 * llvm GEP as well as avx2 gather use signed offsets).
 */
#define LP_MAX_TEXTURE_SIZE (2 * 1024 * 1024 * 1024ULL)
#define LP_MAX_TEXTURE_2D_LEVELS 15  /* 16K x 16K for now */
#define LP_MAX_TEXTURE_3D_LEVELS 12  /* 2K x 2K x 2K for now */
#define LP_MAX_TEXTURE_CUBE_LEVELS 15  /* 16K x 16K for now */
#define LP_MAX_TEXTURE_ARRAY_LAYERS 2048 /* 16K x 2048 / 16K x 16K x 2048 */


/** This must be the larger of LP_MAX_TEXTURE_2D/3D_LEVELS */
#define LP_MAX_TEXTURE_LEVELS LP_MAX_TEXTURE_2D_LEVELS


/**
 * Max drawing surface size is the max texture size
 */
#define LP_MAX_HEIGHT (1 << (LP_MAX_TEXTURE_LEVELS - 1))
#define LP_MAX_WIDTH  (1 << (LP_MAX_TEXTURE_LEVELS - 1))

#define LP_MAX_SAMPLES 4

#define LP_MAX_THREADS 16


/**
 * Max bytes per scene.  This may be replaced by a runtime parameter.
 */
#define LP_MAX_SCENE_SIZE (512 * 1024 * 1024)

/**
 * Max number of shader variants (for all shaders combined,
 * per context) that will be kept around.
 */
#define LP_MAX_SHADER_VARIANTS 1024

/**
 * Max number of instructions (for all fragment shaders combined per context)
 * that will be kept around (counted in terms of llvm ir).
 */
#define LP_MAX_SHADER_INSTRUCTIONS (2048 * LP_MAX_SHADER_VARIANTS)

/**
 * Max number of setup variants that will be kept around.
 *
 * These are determined by the combination of the fragment shader
 * input signature and a small amount of rasterization state (eg
 * flatshading).  It is likely that many active fragment shaders will
 * share the same setup variant.
 */
#define LP_MAX_SETUP_VARIANTS 64

/*
 * Max point size reported. Cap vertex shader point sizes to this.
 */
#define LP_MAX_POINT_WIDTH 255.0f
#endif /* LP_LIMITS_H */