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trezor-firmware/core/embed/rust/src/ui/shape/model/memory.md

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Memory usage comparison

Legacy solution

Memory with DMA access

buffer_line_16bpp              @.buf        1440
buffer_line_4bpp               @.buf         360
buffer_text                    @.buf        4320
-------------------------------------------------
                                            6120

Memory without DMA access

buffer_jpeg                    @.no_dma     7680
buffer_jpeg_work               @.no_dma    10500
buffer_blurring                @.no_dma    14400
buffer_blurring_totals         @.no_dma     1440
zlib context+window            @.stack      2308
-------------------------------------------------
                                           36328

New drawing library

The memory usage is configurable, so the two options are considered.\

MIN variant is slower, but consumes less memory. OPT variant should be sufficient for all purposes.

Memory with DMA access

                                            MIN      OPT
ProgressiveRenderer.slice      @.buf        480     7680
ProgressiveRenderer.scratch    @.buf        480     2048
---------------------------------------------------------
                                            960     9728

Memory without DMA access

ProgressiveRenderer.list       @.stack      512     2048
zlib decompression context     @.no_dma    2308     6924
jpeg decompressor              @.no_dma   10500    10500
partial jpeg image             @.no_dma    7680     7680
blurring window/totals         @.no_dma    7920     7920
------------------------------------------------------------------
                                          28920    35072