Canvas Feature QEMU Code Size Report

• Commit: 1fe189eb

• Date: 2026-05-21T16:05:55.973403

• Build target: APP=HelloSizeAnalysis APP_SUB=canvas_path_probe PORT=qemu CPU_ARCH=cortex-m0plus

• Measurement method: compile a dedicated probe app, then rewrite app-local feature override + probe config headers to enable one feature set.

• Scope: feature-level static qemu ELF sections only (.text/.rodata/.data/.bss).

说明

• 这份报告解决的是“整项能力值不值得开”的问题，不是单个函数的边际成本。

• baseline 明确关闭 MASK/QOI/RLE 这类有总开关的 feature，再与 feature-on 变体比较。

• 对于没有全局开关的能力，例如 IMAGE_TRANSFORM、TEXT_TRANSFORM、GRADIENT，这里仍使用 probe 聚合场景代表该 feature 的总体成本。

• HQ line/circle/arc 不在这份报告里，仍请看 hq_size_report.md。

Baseline

Variant	Text	Rodata	Data	Bss	Total ROM
BASELINE	14532	596	1368	6368	15128

Feature Summary

Feature	Delta Text	Delta Rodata	Delta Data	Delta Bss	Delta ROM
BASIC_GEOMETRY	+13436	+724	+0	+4	+14160
CIRCLE_ARC_BASIC	+13716	+1844	+0	+4	+15560
LINE_FAMILY	+4540	+12	+0	+4	+4552
GRADIENT_FEATURE	+13076	+804	+0	+4	+13880
MASK_FEATURE	+25228	+928	+0	+12	+26156
IMAGE_STD_FEATURE	+10772	+108	+0	+12	+10880
IMAGE_TRANSFORM	+16164	+476	+0	+12	+16640
TEXT_TRANSFORM	+21008	+6432	+0	+12	+27440
RLE_CODEC	+6900	+152	+0	+48	+7052
QOI_CODEC	+8600	+148	+0	+1244	+8748
ALL_COMMON_CANVAS_FEATURES	+115692	+8420	+0	+1280	+124112

Feature Definition

Feature	Included Scenes	Description
BASIC_GEOMETRY	RECT_* ROUND_RECT_* TRIANGLE_*	Basic geometry paths for rect, round-rect and triangle, excluding circle and arc.
CIRCLE_ARC_BASIC	CIRCLE_BASIC_* ARC_BASIC_*	Basic circle and arc feature set, including LUT-related dependency cost.
LINE_FAMILY	LINE POLYLINE	Basic line and polyline feature set.
GRADIENT_FEATURE	GRADIENT_RECT GRADIENT_ROUND_RECT GRADIENT_CIRCLE	Shape gradient feature set.
MASK_FEATURE	MASK_CIRCLE MASK_ROUND_RECT MASK_IMAGE	Mask feature set measured with circle, round-rect and image mask representative scenes.
IMAGE_STD_FEATURE	IMAGE_DRAW IMAGE_RESIZE IMAGE_TINT	Standard image draw, resize and tint feature set.
IMAGE_TRANSFORM	IMAGE_ROTATE	Image transform and rotation feature.
TEXT_TRANSFORM	TEXT_ROTATE	Text transform and rotation feature.
RLE_CODEC	RLE_DRAW	RLE codec enabled, plus one representative draw path to reflect full linked cost.
QOI_CODEC	QOI_DRAW	QOI codec enabled, plus one representative draw path to reflect full linked cost.
ALL_COMMON_CANVAS_FEATURES	all common non-HQ canvas features	All common non-HQ canvas features enabled together.

Detailed Variants

Variant	Feature Config	Text	Rodata	Data	Bss	Total ROM
BASELINE	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0	14532	596	1368	6368	15128
BASIC_GEOMETRY	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_RECT_STROKE_PATH=1 -DEGUI_SIZE_PROBE_RECT_FILL_PATH=1 -DEGUI_SIZE_PROBE_ROUND_RECT_STROKE_PATH=1 -DEGUI_SIZE_PROBE_ROUND_RECT_FILL_PATH=1 -DEGUI_SIZE_PROBE_TRIANGLE_STROKE_PATH=1 -DEGUI_SIZE_PROBE_TRIANGLE_FILL_PATH=1	27968	1320	1368	6372	29288
CIRCLE_ARC_BASIC	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_CIRCLE_BASIC_STROKE_PATH=1 -DEGUI_SIZE_PROBE_CIRCLE_BASIC_FILL_PATH=1 -DEGUI_SIZE_PROBE_ARC_BASIC_STROKE_PATH=1 -DEGUI_SIZE_PROBE_ARC_BASIC_FILL_PATH=1	28248	2440	1368	6372	30688
LINE_FAMILY	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_LINE_PATH=1 -DEGUI_SIZE_PROBE_POLYLINE_PATH=1	19072	608	1368	6372	19680
GRADIENT_FEATURE	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_GRADIENT_RECT_PATH=1 -DEGUI_SIZE_PROBE_GRADIENT_ROUND_RECT_PATH=1 -DEGUI_SIZE_PROBE_GRADIENT_CIRCLE_PATH=1	27608	1400	1368	6372	29008
MASK_FEATURE	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=1 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_MASK_CIRCLE_PATH=1 -DEGUI_SIZE_PROBE_MASK_ROUND_RECT_PATH=1 -DEGUI_SIZE_PROBE_MASK_IMAGE_PATH=1	39760	1524	1368	6380	41284
IMAGE_STD_FEATURE	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_IMAGE_DRAW_PATH=1 -DEGUI_SIZE_PROBE_IMAGE_RESIZE_PATH=1 -DEGUI_SIZE_PROBE_IMAGE_TINT_PATH=1	25304	704	1368	6380	26008
IMAGE_TRANSFORM	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_IMAGE_ROTATE_PATH=1	30696	1072	1368	6380	31768
TEXT_TRANSFORM	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_TEXT_ROTATE_PATH=1	35540	7028	1368	6380	42568
RLE_CODEC	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=1 -DEGUI_SIZE_PROBE_RLE_DRAW_PATH=1	21432	748	1368	6416	22180
QOI_CODEC	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=0 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=1 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=0 -DEGUI_SIZE_PROBE_QOI_DRAW_PATH=1	23132	744	1368	7612	23876
ALL_COMMON_CANVAS_FEATURES	-DEGUI_CONFIG_FUNCTION_SUPPORT_MASK=1 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_QOI=1 -DEGUI_CONFIG_FUNCTION_IMAGE_CODEC_RLE=1 -DEGUI_SIZE_PROBE_RECT_STROKE_PATH=1 -DEGUI_SIZE_PROBE_RECT_FILL_PATH=1 -DEGUI_SIZE_PROBE_ROUND_RECT_STROKE_PATH=1 -DEGUI_SIZE_PROBE_ROUND_RECT_FILL_PATH=1 -DEGUI_SIZE_PROBE_TRIANGLE_STROKE_PATH=1 -DEGUI_SIZE_PROBE_TRIANGLE_FILL_PATH=1 -DEGUI_SIZE_PROBE_CIRCLE_BASIC_STROKE_PATH=1 -DEGUI_SIZE_PROBE_CIRCLE_BASIC_FILL_PATH=1 -DEGUI_SIZE_PROBE_ARC_BASIC_STROKE_PATH=1 -DEGUI_SIZE_PROBE_ARC_BASIC_FILL_PATH=1 -DEGUI_SIZE_PROBE_LINE_PATH=1 -DEGUI_SIZE_PROBE_POLYLINE_PATH=1 -DEGUI_SIZE_PROBE_GRADIENT_RECT_PATH=1 -DEGUI_SIZE_PROBE_GRADIENT_ROUND_RECT_PATH=1 -DEGUI_SIZE_PROBE_GRADIENT_CIRCLE_PATH=1 -DEGUI_SIZE_PROBE_MASK_CIRCLE_PATH=1 -DEGUI_SIZE_PROBE_MASK_ROUND_RECT_PATH=1 -DEGUI_SIZE_PROBE_MASK_IMAGE_PATH=1 -DEGUI_SIZE_PROBE_IMAGE_DRAW_PATH=1 -DEGUI_SIZE_PROBE_IMAGE_RESIZE_PATH=1 -DEGUI_SIZE_PROBE_IMAGE_TINT_PATH=1 -DEGUI_SIZE_PROBE_IMAGE_ROTATE_PATH=1 -DEGUI_SIZE_PROBE_TEXT_ROTATE_PATH=1 -DEGUI_SIZE_PROBE_RLE_DRAW_PATH=1 -DEGUI_SIZE_PROBE_QOI_DRAW_PATH=1	130224	9016	1368	7648	139240

Reproduce

python scripts/size_analysis/main.py canvas-feature-size-to-doc

Raw JSON is written to output/canvas_feature_size_results.json.