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perf(dam2d): rework stm32 dma2d (#3904)

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This commit is contained in:
Tomasz Jastrzębski
2023-01-23 08:37:34 +01:00
committed by GitHub
parent 9faca8a8d4
commit 1853cc5143
3 changed files with 685 additions and 199 deletions
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9
src/draw/lv_draw_img.c
View File

@@ -69,18 +69,19 @@ void lv_draw_img(lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * dsc, const
if(dsc->opa <= LV_OPA_MIN) return;
lv_res_t res;
lv_res_t res = LV_RES_INV;
if(draw_ctx->draw_img) {
res = draw_ctx->draw_img(draw_ctx, dsc, coords, src);
}
else {
if(res != LV_RES_OK) {
res = decode_and_draw(draw_ctx, dsc, coords, src);
}
if(res == LV_RES_INV) {
if(res != LV_RES_OK) {
LV_LOG_WARN("Image draw error");
show_error(draw_ctx, coords, "No\ndata");
return;
}
}

798
src/draw/stm32_dma2d/lv_gpu_stm32_dma2d.c
View File

@@ -11,100 +11,71 @@
#if LV_USE_GPU_STM32_DMA2D
#include LV_GPU_DMA2D_CMSIS_INCLUDE
/*********************
* DEFINES
*********************/
#if LV_COLOR_16_SWAP
// TODO: F7 has red blue swap bit in control register for all layers and output
#error "Can't use DMA2D with LV_COLOR_16_SWAP 1"
// Note: DMA2D red/blue swap (RBS) works for all color modes
#define RBS_BIT 1U
#else
#define RBS_BIT 0U
#endif
#if LV_COLOR_DEPTH == 8
#error "Can't use DMA2D with LV_COLOR_DEPTH == 8"
#endif
#define CACHE_ROW_SIZE 32U // cache row size in Bytes
// For code/implementation discussion refer to https://github.com/lvgl/lvgl/issues/3714#issuecomment-1365187036
// astyle --options=lvgl/scripts/code-format.cfg --ignore-exclude-errors lvgl/src/draw/stm32_dma2d/*.c lvgl/src/draw/stm32_dma2d/*.h
#if LV_COLOR_DEPTH == 16
#define LV_DMA2D_COLOR_FORMAT LV_DMA2D_RGB565
const dma2d_color_format_t LvglColorFormat = RGB565;
#elif LV_COLOR_DEPTH == 32
#define LV_DMA2D_COLOR_FORMAT LV_DMA2D_ARGB8888
const dma2d_color_format_t LvglColorFormat = ARGB8888;
#else
/*Can't use GPU with other formats*/
#error "Cannot use DMA2D with LV_COLOR_DEPTH other than 16 or 32"
#endif
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_draw_stm32_dma2d_blend_fill(lv_color_t * dest_buf, lv_coord_t dest_stride, const lv_area_t * fill_area,
lv_color_t color);
static void lv_draw_stm32_dma2d_blend_map(lv_color_t * dest_buf, const lv_area_t * dest_area, lv_coord_t dest_stride,
const lv_color_t * src_buf, lv_coord_t src_stride, lv_opa_t opa);
static void lv_draw_stm32_dma2d_img_decoded(lv_draw_ctx_t * draw, const lv_draw_img_dsc_t * dsc,
const lv_area_t * coords, const uint8_t * map_p, lv_img_cf_t color_format);
static void invalidate_cache(void);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
static bool isDma2dInProgess = false; // indicates whether DMA2D transfer *initiated here* is in progress
/**
* Turn on the peripheral and set output color mode, this only needs to be done once
*/
void lv_draw_stm32_dma2d_init(void)
{
/*Enable DMA2D clock*/
// Enable DMA2D clock
#if defined(STM32F4) || defined(STM32F7)
RCC->AHB1ENR |= RCC_AHB1ENR_DMA2DEN;
RCC->AHB1ENR |= RCC_AHB1ENR_DMA2DEN; // enable DMA2D
#elif defined(STM32H7)
RCC->AHB3ENR |= RCC_AHB3ENR_DMA2DEN;
#else
# warning "LVGL can't enable the clock of DMA2D"
#endif
/*Wait for hardware access to complete*/
// Wait for hardware access to complete
__asm volatile("DSB\n");
/*Delay after setting peripheral clock*/
// Delay after setting peripheral clock
volatile uint32_t temp = RCC->AHB1ENR;
LV_UNUSED(temp);
/*set output colour mode*/
DMA2D->OPFCCR = LV_DMA2D_COLOR_FORMAT;
// AHB master timer configuration
DMA2D->AMTCR = 0; // AHB bus guaranteed dead time disabled
#if defined(LV_STM32_DMA2D_TEST)
_lv_gpu_stm32_dwt_init(); // init µs timer
#endif
}
void lv_draw_stm32_dma2d_ctx_init(lv_disp_drv_t * drv, lv_draw_ctx_t * draw_ctx)
{
lv_draw_sw_init_ctx(drv, draw_ctx);
lv_draw_stm32_dma2d_ctx_t * dma2d_draw_ctx = (lv_draw_sw_ctx_t *)draw_ctx;
dma2d_draw_ctx->blend = lv_draw_stm32_dma2d_blend;
// dma2d_draw_ctx->base_draw.draw_img_decoded = lv_draw_stm32_dma2d_img_decoded;
dma2d_draw_ctx->base_draw.wait_for_finish = lv_gpu_stm32_dma2d_wait_cb;
dma2d_draw_ctx->base_draw.draw_img_decoded = lv_draw_stm32_dma2d_img_decoded;
//dma2d_draw_ctx->base_draw.draw_img = lv_draw_stm32_dma2d_img;
// Note: currently it does not make sense use lv_gpu_stm32_dma2d_wait_cb() since waiting starts right after the dma2d transfer
//dma2d_draw_ctx->base_draw.wait_for_finish = lv_gpu_stm32_dma2d_wait_cb;
dma2d_draw_ctx->base_draw.buffer_copy = lv_draw_stm32_dma2d_buffer_copy;
}
void lv_draw_stm32_dma2d_ctx_deinit(lv_disp_drv_t * drv, lv_draw_ctx_t * draw_ctx)
@@ -113,153 +84,636 @@ void lv_draw_stm32_dma2d_ctx_deinit(lv_disp_drv_t * drv, lv_draw_ctx_t * draw_ct
LV_UNUSED(draw_ctx);
}
void lv_draw_stm32_dma2d_blend(lv_draw_ctx_t * draw_ctx, const lv_draw_sw_blend_dsc_t * dsc)
static void lv_draw_stm32_dma2d_blend(lv_draw_ctx_t * draw_ctx, const lv_draw_sw_blend_dsc_t * dsc)
{
lv_area_t blend_area;
if(!_lv_area_intersect(&blend_area, dsc->blend_area, draw_ctx->clip_area)) return;
if(dsc->blend_mode != LV_BLEND_MODE_NORMAL) {
lv_draw_sw_blend_basic(draw_ctx, dsc);
return;
}
// Note: x1 must be zero. Otherwise, there is no way to correctly calculate dest_stride.
//LV_ASSERT_MSG(draw_ctx->buf_area->x1 == 0); // critical?
// Both draw buffer start address and buffer size *must* be 32-byte aligned since draw buffer cache is being invalidated.
//uint32_t drawBufferLength = lv_area_get_size(draw_ctx->buf_area) * sizeof(lv_color_t);
//LV_ASSERT_MSG(drawBufferLength % CACHE_ROW_SIZE == 0); // critical, but this is not the way to test it
//LV_ASSERT_MSG((uint32_t)draw_ctx->buf % CACHE_ROW_SIZE == 0, "draw_ctx.buf is not 32B aligned"); // critical?
bool done = false;
if(dsc->mask_buf == NULL && dsc->blend_mode == LV_BLEND_MODE_NORMAL && lv_area_get_size(&blend_area) > 100) {
lv_coord_t dest_stride = lv_area_get_width(draw_ctx->buf_area);
lv_color_t * dest_buf = draw_ctx->buf;
dest_buf += dest_stride * (blend_area.y1 - draw_ctx->buf_area->y1) + (blend_area.x1 - draw_ctx->buf_area->x1);
const lv_color_t * src_buf = dsc->src_buf;
if(src_buf) {
lv_draw_sw_blend_basic(draw_ctx, dsc);
lv_coord_t src_stride;
src_stride = lv_area_get_width(dsc->blend_area);
src_buf += src_stride * (blend_area.y1 - dsc->blend_area->y1) + (blend_area.x1 - dsc->blend_area->x1);
lv_area_move(&blend_area, -draw_ctx->buf_area->x1, -draw_ctx->buf_area->y1);
lv_draw_stm32_dma2d_blend_map(dest_buf, &blend_area, dest_stride, src_buf, src_stride, dsc->opa);
done = true;
}
else if(dsc->opa >= LV_OPA_MAX) {
lv_area_move(&blend_area, -draw_ctx->buf_area->x1, -draw_ctx->buf_area->y1);
lv_draw_stm32_dma2d_blend_fill(dest_buf, dest_stride, &blend_area, dsc->color);
done = true;
}
if(dsc->src_buf) {
// For performance reasons, both source buffer start address and buffer size *should* be 32-byte aligned since source buffer cache is being cleaned.
//uint32_t srcBufferLength = lv_area_get_size(dsc->blend_area) * sizeof(lv_color_t);
//LV_ASSERT_MSG(srcBufferLength % CACHE_ROW_SIZE == 0); // FIXME: assert fails (performance, non-critical)
//LV_ASSERT_MSG((uint32_t)dsc->src_buf % CACHE_ROW_SIZE == 0); // FIXME: assert fails (performance, non-critical)
}
if(!done) lv_draw_sw_blend_basic(draw_ctx, dsc);
}
lv_area_t draw_area;
if(!_lv_area_intersect(&draw_area, dsc->blend_area, draw_ctx->clip_area)) return;
// + draw_ctx->buf_area has the entire draw buffer location
// + draw_ctx->clip_area has the current draw buffer location
// + dsc->blend_area has the location of the area intended to be painted - image etc.
// + draw_area has the area actually being painted
// All coordinates are relative to the screen.
void lv_draw_stm32_dma2d_buffer_copy(lv_draw_ctx_t * draw_ctx,
void * dest_buf, lv_coord_t dest_stride, const lv_area_t * dest_area,
void * src_buf, lv_coord_t src_stride, const lv_area_t * src_area)
{
LV_UNUSED(draw_ctx);
lv_draw_stm32_dma2d_blend_map(dest_buf, dest_area, dest_stride, src_buf, src_stride, LV_OPA_MAX);
}
const lv_opa_t * mask = dsc->mask_buf;
if(dsc->mask_buf && dsc->mask_res == LV_DRAW_MASK_RES_TRANSP) return;
else if(dsc->mask_res == LV_DRAW_MASK_RES_FULL_COVER) mask = NULL;
static void lv_draw_stm32_dma2d_img_decoded(lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * dsc,
const lv_area_t * coords, const uint8_t * map_p, lv_img_cf_t color_format)
{
/*TODO basic ARGB8888 image can be handles here*/
lv_coord_t dest_stride = lv_area_get_width(draw_ctx->buf_area);
if(mask != NULL) {
// For performance reasons, both mask buffer start address and buffer size *should* be 32-byte aligned since mask buffer cache is being cleaned.
//uint32_t srcBufferLength = lv_area_get_size(dsc->mask_area) * sizeof(lv_opa_t);
//LV_ASSERT_MSG(srcBufferLength % CACHE_ROW_SIZE == 0); // FIXME: assert fails (performance, non-critical)
//LV_ASSERT_MSG((uint32_t)mask % CACHE_ROW_SIZE == 0); // FIXME: assert fails (performance, non-critical)
lv_draw_sw_img_decoded(draw_ctx, dsc, coords, map_p, color_format);
}
lv_coord_t mask_stride = lv_area_get_width(dsc->mask_area);
lv_point_t mask_offset = lv_area_get_offset(dsc->mask_area, &draw_area); // mask offset in relation to draw_area
static void lv_draw_stm32_dma2d_blend_fill(lv_color_t * dest_buf, lv_coord_t dest_stride, const lv_area_t * fill_area,
lv_color_t color)
{
/*Simply fill an area*/
int32_t area_w = lv_area_get_width(fill_area);
int32_t area_h = lv_area_get_height(fill_area);
invalidate_cache();
if(dsc->src_buf == NULL) { // 93.5%
lv_area_move(&draw_area, -draw_ctx->buf_area->x1, -draw_ctx->buf_area->y1);
_lv_draw_stm32_dma2d_blend_paint(draw_ctx->buf, dest_stride, &draw_area, mask, mask_stride, &mask_offset, dsc->color,
dsc->opa);
}
else { // 0.2%
// note: (x)RGB dsc->src_buf does not carry alpha channel bytes,
// alpha channel bytes are carried in dsc->mask_buf
#if LV_COLOR_DEPTH == 32
lv_coord_t src_stride = lv_area_get_width(dsc->blend_area);
lv_point_t src_offset = lv_area_get_offset(dsc->blend_area, &draw_area); // source image offset in relation to draw_area
lv_coord_t draw_width = lv_area_get_width(&draw_area);
lv_coord_t draw_height = lv_area_get_height(&draw_area);
DMA2D->CR = 0x30000;
DMA2D->OMAR = (uint32_t)dest_buf;
/*as input color mode is same as output we don't need to convert here do we?*/
DMA2D->OCOLR = color.full;
DMA2D->OOR = dest_stride - area_w;
DMA2D->NLR = (area_w << DMA2D_NLR_PL_Pos) | (area_h << DMA2D_NLR_NL_Pos);
// merge mask alpha bytes with src RGB bytes
// TODO: optimize by reading 4 or 8 mask bytes at a time
mask += (mask_stride * mask_offset.y) + mask_offset.x;
lv_color_t * src_buf = (lv_color_t *)dsc->src_buf;
src_buf += (src_stride * src_offset.y) + src_offset.x;
uint16_t mask_buffer_offset = mask_stride - draw_width;
uint16_t src_buffer_offset = src_stride - draw_width;
while(draw_height > 0) {
draw_height--;
for(uint16_t x = 0; x < draw_width; x++) {
(*src_buf).ch.alpha = *mask;
src_buf++;
mask++;
}
mask += mask_buffer_offset;
src_buf += src_buffer_offset;
}
/*start transfer*/
DMA2D->CR |= DMA2D_CR_START_Msk;
lv_area_move(&draw_area, -draw_ctx->buf_area->x1,
-draw_ctx->buf_area->y1); // translate the screen draw area to the origin of the buffer area
_lv_draw_stm32_dma2d_blend_map(draw_ctx->buf, dest_stride, &draw_area, dsc->src_buf, src_stride, &src_offset, dsc->opa,
ARGB8888, false);
#else
// Note: 16-bit bitmap hardware blending with mask and background is possible, but requires a temp 24 or 32-bit buffer to combine bitmap with mask first.
}
static void lv_draw_stm32_dma2d_blend_map(lv_color_t * dest_buf, const lv_area_t * dest_area, lv_coord_t dest_stride,
const lv_color_t * src_buf, lv_coord_t src_stride, lv_opa_t opa)
{
/*Simple copy*/
int32_t dest_w = lv_area_get_width(dest_area);
int32_t dest_h = lv_area_get_height(dest_area);
invalidate_cache();
if(opa >= LV_OPA_MAX) {
DMA2D->CR = 0;
/*copy output colour mode, this register controls both input and output colour format*/
DMA2D->FGPFCCR = LV_DMA2D_COLOR_FORMAT;
DMA2D->FGMAR = (uint32_t)src_buf;
DMA2D->FGOR = src_stride - dest_w;
DMA2D->OMAR = (uint32_t)dest_buf;
DMA2D->OOR = dest_stride - dest_w;
DMA2D->NLR = (dest_w << DMA2D_NLR_PL_Pos) | (dest_h << DMA2D_NLR_NL_Pos);
/*start transfer*/
DMA2D->CR |= DMA2D_CR_START_Msk;
lv_draw_sw_blend_basic(draw_ctx, dsc); // (e.g. Shop Items)
// clean cache after software drawing - this does not help since this is not the only place where buffer is written without dma2d
// lv_coord_t draw_width = lv_area_get_width(&draw_area);
// lv_coord_t draw_height = lv_area_get_height(&draw_area);
// uint32_t dest_address = (uint32_t)(draw_ctx->buf + (dest_stride * draw_area.y1) + draw_area.x1);
// _lv_gpu_stm32_dma2d_clean_cache(dest_address, dest_stride - draw_width, draw_width, draw_height, sizeof(lv_color_t));
#endif
}
}
else {
DMA2D->CR = 0x20000;
DMA2D->BGPFCCR = LV_DMA2D_COLOR_FORMAT;
DMA2D->BGMAR = (uint32_t)dest_buf;
DMA2D->BGOR = dest_stride - dest_w;
DMA2D->FGPFCCR = (uint32_t)LV_DMA2D_COLOR_FORMAT
/*alpha mode 2, replace with foreground * alpha value*/
| (2 << DMA2D_FGPFCCR_AM_Pos)
/*alpha value*/
| (opa << DMA2D_FGPFCCR_ALPHA_Pos);
DMA2D->FGMAR = (uint32_t)src_buf;
DMA2D->FGOR = src_stride - dest_w;
DMA2D->OMAR = (uint32_t)dest_buf;
DMA2D->OOR = dest_stride - dest_w;
DMA2D->NLR = (dest_w << DMA2D_NLR_PL_Pos) | (dest_h << DMA2D_NLR_NL_Pos);
/*start transfer*/
DMA2D->CR |= DMA2D_CR_START_Msk;
if(dsc->src_buf == NULL) { // 6.1%
lv_area_move(&draw_area, -draw_ctx->buf_area->x1,
-draw_ctx->buf_area->y1); // translate the screen draw area to the origin of the buffer area
_lv_draw_stm32_dma2d_blend_fill(draw_ctx->buf, dest_stride, &draw_area, dsc->color, dsc->opa);
}
else { // 0.2%
lv_coord_t src_stride = lv_area_get_width(dsc->blend_area);
lv_point_t src_offset = lv_area_get_offset(dsc->blend_area, &draw_area); // source image offset in relation to draw_area
lv_area_move(&draw_area, -draw_ctx->buf_area->x1,
-draw_ctx->buf_area->y1); // translate the screen draw area to the origin of the buffer area
_lv_draw_stm32_dma2d_blend_map(draw_ctx->buf, dest_stride, &draw_area, dsc->src_buf, src_stride, &src_offset, dsc->opa,
LvglColorFormat, true);
}
}
}
void lv_gpu_stm32_dma2d_wait_cb(lv_draw_ctx_t * draw_ctx)
// Does dest_area = intersect(draw_ctx->clip_area, src_area) ?
// See: https://github.com/lvgl/lvgl/issues/3714#issuecomment-1331710788
static void lv_draw_stm32_dma2d_buffer_copy(lv_draw_ctx_t * draw_ctx, void * dest_buf, lv_coord_t dest_stride,
const lv_area_t * dest_area, void * src_buf, lv_coord_t src_stride, const lv_area_t * src_area)
{
// Both draw buffer start address and buffer size *must* be 32-byte aligned since draw buffer cache is being invalidated.
//uint32_t drawBufferLength = lv_area_get_size(draw_ctx->buf_area) * sizeof(lv_color_t);
//LV_ASSERT_MSG(drawBufferLength % CACHE_ROW_SIZE == 0); // critical, but this is not the way to test it
//LV_ASSERT_MSG((uint32_t)draw_ctx->buf % CACHE_ROW_SIZE == 0, "draw_ctx.buf is not 32B aligned"); // critical?
// FIXME:
// 1. Both src_buf and dest_buf pixel size *must* be known to use DMA2D.
// 2. Verify both buffers start addresses and lengths are 32-byte (cache row size) aligned.
LV_UNUSED(draw_ctx);
lv_point_t src_offset = lv_area_get_offset(src_area, dest_area);
// FIXME: use lv_area_move(dest_area, -dest_area->x1, -dest_area->y1) here ?
// TODO: It is assumed that dest_buf and src_buf buffers are of lv_color_t type. Verify it, this assumption may be incorrect.
_lv_draw_stm32_dma2d_blend_map((const lv_color_t *)dest_buf, dest_stride, dest_area, (const lv_color_t *)src_buf,
src_stride, &src_offset, 0xff, LvglColorFormat, true);
// TODO: Investigate if output buffer cache needs to be invalidated. It depends on what the destination buffer is and how it is used next - by dma2d or not.
_lv_gpu_stm32_dma2d_await_dma_transfer_finish(NULL); // TODO: is this line needed here?
}
static void lv_draw_stm32_dma2d_img_decoded(lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * img_dsc,
const lv_area_t * coords, const uint8_t * src_buf, lv_img_cf_t color_format)
{
if(draw_ctx->draw_img_decoded == NULL) return;
lv_area_t draw_area;
lv_area_copy(&draw_area, draw_ctx->clip_area);
bool mask_any = lv_draw_mask_is_any(&draw_area);
bool transform = img_dsc->angle != 0 || img_dsc->zoom != LV_IMG_ZOOM_NONE;
const dma2d_color_format_t bitmapColorFormat = lv_color_format_to_dma2d_color_format(color_format);
const bool ignoreBitmapAlpha = (color_format == LV_IMG_CF_RGBX8888);
if(!mask_any && !transform && bitmapColorFormat != UNSUPPORTED && img_dsc->recolor_opa == LV_OPA_TRANSP) {
// simple bitmap blending, optionally with supported color format conversion - handle directly by dma2d
lv_coord_t dest_stride = lv_area_get_width(draw_ctx->buf_area);
lv_coord_t src_stride = lv_area_get_width(coords);
lv_point_t src_offset = lv_area_get_offset(coords, &draw_area); // source image offset in relation to draw_area
lv_area_move(&draw_area, -draw_ctx->buf_area->x1, -draw_ctx->buf_area->y1);
_lv_draw_stm32_dma2d_blend_map(draw_ctx->buf, dest_stride, &draw_area, src_buf, src_stride, &src_offset,
img_dsc->opa, bitmapColorFormat, ignoreBitmapAlpha);
}
else {
// all more complex cases which require additional image transformations
lv_draw_sw_img_decoded(draw_ctx, img_dsc, coords, src_buf, color_format);
}
}
static lv_point_t lv_area_get_offset(const lv_area_t * area1, const lv_area_t * area2)
{
lv_point_t offset = {x: area2->x1 - area1->x1, y: area2->y1 - area1->y1};
return offset;
}
static dma2d_color_format_t lv_color_format_to_dma2d_color_format(lv_img_cf_t color_format)
{
switch(color_format) {
case LV_IMG_CF_RGBA8888:
// note: LV_IMG_CF_RGBA8888 is actually ARGB8888
return ARGB8888;
case LV_IMG_CF_RGBX8888:
// note: LV_IMG_CF_RGBX8888 is actually XRGB8888
return ARGB8888;
case LV_IMG_CF_RGB565:
return RGB565;
case LV_IMG_CF_TRUE_COLOR:
return LvglColorFormat;
case LV_IMG_CF_TRUE_COLOR_ALPHA:
#if LV_COLOR_DEPTH == 16
// bitmap color format is 24b ARGB8565 - dma2d unsupported
return UNSUPPORTED;
#elif LV_COLOR_DEPTH == 32
return ARGB8888;
#else
// unknown bitmap color format
return UNSUPPORTED;
#endif
default:
return UNSUPPORTED;
}
}
static lv_res_t lv_draw_stm32_dma2d_img(lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * img_dsc,
const lv_area_t * src_area,
const void * src)
{
//if(lv_img_src_get_type(src) != LV_IMG_SRC_VARIABLE) return LV_RES_INV;
return LV_RES_INV;
if(img_dsc->opa <= LV_OPA_MIN) return LV_RES_OK;
const lv_img_dsc_t * img = src;
const dma2d_color_format_t bitmapColorFormat = lv_color_format_to_dma2d_color_format(img->header.cf);
const bool ignoreBitmapAlpha = (img->header.cf == LV_IMG_CF_RGBX8888);
if(bitmapColorFormat == UNSUPPORTED || img_dsc->angle != 0 || img_dsc->zoom != LV_IMG_ZOOM_NONE) {
return LV_RES_INV; // sorry, dma2d can handle this
}
// FIXME: handle dsc.pivot, dsc.recolor, dsc.blend_mode
// FIXME: src pixel size *must* be known to use DMA2D
// FIXME: If image is drawn by SW, then output cache needs to be cleaned next. Currently it is not possible.
// Both draw buffer start address and buffer size *must* be 32-byte aligned since draw buffer cache is being invalidated.
//uint32_t drawBufferLength = lv_area_get_size(draw_ctx->buf_area) * sizeof(lv_color_t);
//LV_ASSERT_MSG(drawBufferLength % CACHE_ROW_SIZE == 0); // critical, but this is not the way to test it
//LV_ASSERT_MSG((uint32_t)draw_ctx->buf % CACHE_ROW_SIZE == 0, "draw_ctx.buf is not 32B aligned"); // critical?
// For performance reasons, both source buffer start address and buffer size *should* be 32-byte aligned since source buffer cache is being cleaned.
//uint32_t srcBufferLength = lv_area_get_size(src_area) * sizeof(lv_color_t); // TODO: verify src pixel size = sizeof(lv_color_t)
//LV_ASSERT_MSG(srcBufferLength % CACHE_ROW_SIZE == 0); // FIXME: assert fails (performance, non-critical)
//LV_ASSERT_MSG((uint32_t)src % CACHE_ROW_SIZE == 0); // FIXME: assert fails (performance, non-critical)
lv_area_t draw_area;
if(!_lv_area_intersect(&draw_area, src_area, draw_ctx->clip_area)) return LV_RES_OK;
lv_coord_t dest_stride = lv_area_get_width(draw_ctx->buf_area);
lv_point_t src_offset = lv_area_get_offset(src_area, &draw_area); // source image offset in relation to draw_area
lv_area_move(&draw_area, -draw_ctx->buf_area->x1, -draw_ctx->buf_area->y1);
_lv_draw_stm32_dma2d_blend_map(draw_ctx->buf, dest_stride, &draw_area, img->data, img->header.w,
&src_offset, img_dsc->opa, bitmapColorFormat, ignoreBitmapAlpha);
return LV_RES_OK;
}
static void lv_gpu_stm32_dma2d_wait_cb(lv_draw_ctx_t * draw_ctx)
{
lv_disp_t * disp = _lv_refr_get_disp_refreshing();
if(disp->driver && disp->driver->wait_cb) {
while(DMA2D->CR & DMA2D_CR_START_Msk) {
disp->driver->wait_cb(disp->driver);
}
}
else {
while(DMA2D->CR & DMA2D_CR_START_Msk);
}
_lv_gpu_stm32_dma2d_await_dma_transfer_finish(disp->driver);
lv_draw_sw_wait_for_finish(draw_ctx);
}
/**********************
* STATIC FUNCTIONS
**********************/
static void invalidate_cache(void)
/**
* @brief Fills draw_area with specified color.
* @param color color to be painted, note: alpha is ignored
*/
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_blend_fill(const lv_color_t * dest_buf, lv_coord_t dest_stride,
const lv_area_t * draw_area, lv_color_t color, lv_opa_t opa)
{
lv_disp_t * disp = _lv_refr_get_disp_refreshing();
if(disp->driver->clean_dcache_cb) disp->driver->clean_dcache_cb(disp->driver);
else {
#if __CORTEX_M >= 0x07
if((SCB->CCR) & (uint32_t)SCB_CCR_DC_Msk)
SCB_CleanInvalidateDCache();
LV_ASSERT_MSG(!isDma2dInProgess, "dma2d transfer has not finished"); // critical
lv_coord_t draw_width = lv_area_get_width(draw_area);
lv_coord_t draw_height = lv_area_get_height(draw_area);
_lv_gpu_stm32_dma2d_await_dma_transfer_finish(NULL);
if(opa >= LV_OPA_MAX) {
DMA2D->CR = 0x3UL << DMA2D_CR_MODE_Pos; // Register-to-memory (no FG nor BG, only output stage active)
DMA2D->OPFCCR = LvglColorFormat;
DMA2D->OPFCCR |= (RBS_BIT << DMA2D_OPFCCR_RBS_Pos);
DMA2D->OMAR = (uint32_t)(dest_buf + (dest_stride * draw_area->y1) + draw_area->x1);
DMA2D->OOR = dest_stride - draw_width; // out buffer offset
// Note: unlike FGCOLR and BGCOLR, OCOLR bits must match DMA2D_OUTPUT_COLOR, alpha can be specified
#if RBS_BIT
// swap red/blue bits
DMA2D->OCOLR = (color.ch.blue << 11) | (color.ch.green_l << 5 | color.ch.green_h << 8) | (color.ch.red);
#else
DMA2D->OCOLR = color.full;
#endif
}
else {
DMA2D->CR = 0x2UL << DMA2D_CR_MODE_Pos; // Memory-to-memory with blending (FG and BG fetch with PFC and blending)
DMA2D->FGPFCCR = A8;
DMA2D->FGPFCCR |= (opa << DMA2D_FGPFCCR_ALPHA_Pos);
// Alpha Mode 1: Replace original foreground image alpha channel value by FGPFCCR.ALPHA
DMA2D->FGPFCCR |= (0x1UL << DMA2D_FGPFCCR_AM_Pos);
//DMA2D->FGPFCCR |= (RBS_BIT << DMA2D_FGPFCCR_RBS_Pos);
// Note: in Alpha Mode 1 FGMAR and FGOR are not used to supply foreground A8 bytes,
// those bytes are replaced by constant ALPHA defined in FGPFCCR
DMA2D->FGMAR = (uint32_t)dest_buf;
DMA2D->FGOR = dest_stride;
DMA2D->FGCOLR = lv_color_to32(color) & 0x00ffffff; // swap FGCOLR R/B bits if FGPFCCR.RBS (RBS_BIT) bit is set
DMA2D->BGPFCCR = LvglColorFormat;
DMA2D->BGPFCCR |= (RBS_BIT << DMA2D_BGPFCCR_RBS_Pos);
DMA2D->BGMAR = (uint32_t)(dest_buf + (dest_stride * draw_area->y1) + draw_area->x1);
DMA2D->BGOR = dest_stride - draw_width;
DMA2D->BGCOLR = 0; // used in A4 and A8 modes only
_lv_gpu_stm32_dma2d_clean_cache(DMA2D->BGMAR, DMA2D->BGOR, draw_width, draw_height, sizeof(lv_color_t));
DMA2D->OPFCCR = LvglColorFormat;
DMA2D->OPFCCR |= (RBS_BIT << DMA2D_OPFCCR_RBS_Pos);
DMA2D->OMAR = DMA2D->BGMAR;
DMA2D->OOR = DMA2D->BGOR;
DMA2D->OCOLR = 0;
}
// PL - pixel per lines (14 bit), NL - number of lines (16 bit)
DMA2D->NLR = (draw_width << DMA2D_NLR_PL_Pos) | (draw_height << DMA2D_NLR_NL_Pos);
_lv_gpu_stm32_dma2d_start_dma_transfer();
}
/**
* @brief Draws src (foreground) map on dst (background) map.
* @param src_offset src offset in relation to dst, useful when src is larger than draw_area
* @param opa constant opacity to be applied
* @param bitmapColorCode bitmap color type
* @param ignoreAlpha if TRUE, bitmap src alpha channel is ignored
*/
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_blend_map(const lv_color_t * dest_buf, lv_coord_t dest_stride,
const lv_area_t * draw_area, const void * src_buf, lv_coord_t src_stride, const lv_point_t * src_offset, lv_opa_t opa,
dma2d_color_format_t src_color_format, bool ignore_src_alpha)
{
LV_ASSERT_MSG(!isDma2dInProgess, "dma2d transfer has not finished"); // critical
if(opa <= LV_OPA_MIN || src_color_format == UNSUPPORTED) return;
lv_coord_t draw_width = lv_area_get_width(draw_area);
lv_coord_t draw_height = lv_area_get_height(draw_area);
bool bitmapHasOpacity = !ignore_src_alpha && (src_color_format == ARGB8888 || src_color_format == ARGB1555 ||
src_color_format == ARGB4444);
if(opa >= LV_OPA_MAX) opa = 0xff;
uint8_t srcBpp; // source bytes per pixel
switch(src_color_format) {
case ARGB8888:
srcBpp = 4;
break;
case RGB888:
srcBpp = 3;
break;
case RGB565:
case ARGB1555:
case ARGB4444:
srcBpp = 2;
break;
default:
LV_LOG_ERROR("unsupported color format");
return;
}
_lv_gpu_stm32_dma2d_await_dma_transfer_finish(NULL);
DMA2D->FGPFCCR = src_color_format;
if(opa == 0xff && !bitmapHasOpacity) {
// no need to blend
if(src_color_format == LvglColorFormat) {
// no need to convert pixel format (PFC) either
DMA2D->CR = 0x0UL;
}
else {
DMA2D->CR = 0x1UL << DMA2D_CR_MODE_Pos; // Memory-to-memory with PFC (FG fetch only with FG PFC active)
}
// Alpha Mode 0: No modification of the foreground image alpha channel value
}
else {
// blend
DMA2D->CR = 0x2UL << DMA2D_CR_MODE_Pos; // Memory-to-memory with blending (FG and BG fetch with PFC and blending)
DMA2D->FGPFCCR |= (opa << DMA2D_FGPFCCR_ALPHA_Pos);
if(bitmapHasOpacity) {
// Alpha Mode 2: Replace original foreground image alpha channel value by FGPFCCR.ALPHA multiplied with original alpha channel value
DMA2D->FGPFCCR |= (0x2UL << DMA2D_FGPFCCR_AM_Pos);
}
else {
// Alpha Mode 1: Replace original foreground image alpha channel value by FGPFCCR.ALPHA
DMA2D->FGPFCCR |= (0x1UL << DMA2D_FGPFCCR_AM_Pos);
}
}
DMA2D->FGPFCCR |= (RBS_BIT << DMA2D_FGPFCCR_RBS_Pos);
DMA2D->FGMAR = ((uint32_t)src_buf) + srcBpp * ((src_stride * src_offset->y) + src_offset->x);
DMA2D->FGOR = src_stride - draw_width;
DMA2D->FGCOLR = 0; // used in A4 and A8 modes only
_lv_gpu_stm32_dma2d_clean_cache(DMA2D->FGMAR, DMA2D->FGOR, draw_width, draw_height, srcBpp);
DMA2D->OPFCCR = LvglColorFormat;
DMA2D->OPFCCR |= (RBS_BIT << DMA2D_OPFCCR_RBS_Pos);
DMA2D->OMAR = (uint32_t)(dest_buf + (dest_stride * draw_area->y1) + draw_area->x1);
DMA2D->OOR = dest_stride - draw_width;
DMA2D->OCOLR = 0;
if(opa != 0xff || bitmapHasOpacity) {
// use background (BG*) registers
DMA2D->BGPFCCR = LvglColorFormat;
DMA2D->BGPFCCR |= (RBS_BIT << DMA2D_BGPFCCR_RBS_Pos);
DMA2D->BGMAR = DMA2D->OMAR;
DMA2D->BGOR = DMA2D->OOR;
DMA2D->BGCOLR = 0; // used in A4 and A8 modes only
_lv_gpu_stm32_dma2d_clean_cache(DMA2D->BGMAR, DMA2D->BGOR, draw_width, draw_height, sizeof(lv_color_t));
}
// PL - pixel per lines (14 bit), NL - number of lines (16 bit)
DMA2D->NLR = (draw_width << DMA2D_NLR_PL_Pos) | (draw_height << DMA2D_NLR_NL_Pos);
_lv_gpu_stm32_dma2d_start_dma_transfer();
}
/**
* @brief Paints solid color with alpha mask with additional constant opacity. Useful e.g. for painting anti-aliased fonts.
* @param src_offset src offset in relation to dst, useful when src (alpha mask) is larger than draw_area
* @param color color to paint, note: alpha is ignored
* @param opa constant opacity to be applied
*/
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_blend_paint(const lv_color_t * dest_buf, lv_coord_t dest_stride,
const lv_area_t * draw_area, const lv_opa_t * mask_buf, lv_coord_t mask_stride, const lv_point_t * mask_offset,
lv_color_t color, lv_opa_t opa)
{
LV_ASSERT_MSG(!isDma2dInProgess, "dma2d transfer has not finished"); // critical
lv_coord_t draw_width = lv_area_get_width(draw_area);
lv_coord_t draw_height = lv_area_get_height(draw_area);
_lv_gpu_stm32_dma2d_await_dma_transfer_finish(NULL);
DMA2D->CR = 0x2UL << DMA2D_CR_MODE_Pos; // Memory-to-memory with blending (FG and BG fetch with PFC and blending)
DMA2D->FGPFCCR = A8;
if(opa < LV_OPA_MAX) {
DMA2D->FGPFCCR |= (opa << DMA2D_FGPFCCR_ALPHA_Pos);
DMA2D->FGPFCCR |= (0x2UL <<
DMA2D_FGPFCCR_AM_Pos); // Alpha Mode: Replace original foreground image alpha channel value by FGPFCCR.ALPHA multiplied with original alpha channel value
}
//DMA2D->FGPFCCR |= (RBS_BIT << DMA2D_FGPFCCR_RBS_Pos);
DMA2D->FGMAR = (uint32_t)(mask_buf + (mask_stride * mask_offset->y) + mask_offset->x);
DMA2D->FGOR = mask_stride - draw_width;
DMA2D->FGCOLR = lv_color_to32(color) & 0x00ffffff; // swap FGCOLR R/B bits if FGPFCCR.RBS (RBS_BIT) bit is set
_lv_gpu_stm32_dma2d_clean_cache(DMA2D->FGMAR, DMA2D->FGOR, draw_width, draw_height, sizeof(lv_opa_t));
DMA2D->BGPFCCR = LvglColorFormat;
DMA2D->BGPFCCR |= (RBS_BIT << DMA2D_BGPFCCR_RBS_Pos);
DMA2D->BGMAR = (uint32_t)(dest_buf + (dest_stride * draw_area->y1) + draw_area->x1);
DMA2D->BGOR = dest_stride - draw_width;
DMA2D->BGCOLR = 0; // used in A4 and A8 modes only
_lv_gpu_stm32_dma2d_clean_cache(DMA2D->BGMAR, DMA2D->BGOR, draw_width, draw_height, sizeof(lv_color_t));
DMA2D->OPFCCR = LvglColorFormat;
DMA2D->OPFCCR |= (RBS_BIT << DMA2D_OPFCCR_RBS_Pos);
DMA2D->OMAR = DMA2D->BGMAR;
DMA2D->OOR = DMA2D->BGOR;
DMA2D->OCOLR = 0;
// PL - pixel per lines (14 bit), NL - number of lines (16 bit)
DMA2D->NLR = (draw_width << DMA2D_NLR_PL_Pos) | (draw_height << DMA2D_NLR_NL_Pos);
_lv_gpu_stm32_dma2d_start_dma_transfer();
}
/**
* @brief Copies src (foreground) map to the dst (background) map.
* @param src_offset src offset in relation to dst, useful when src is larger than draw_area
*/
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_copy_buffer(const lv_color_t * dest_buf, lv_coord_t dest_stride,
const lv_area_t * draw_area, const lv_color_t * src_buf, lv_coord_t src_stride, const lv_point_t * src_offset)
{
LV_ASSERT_MSG(!isDma2dInProgess, "dma2d transfer has not finished"); // critical
lv_coord_t draw_width = lv_area_get_width(draw_area);
lv_coord_t draw_height = lv_area_get_height(draw_area);
_lv_gpu_stm32_dma2d_await_dma_transfer_finish(NULL);
DMA2D->CR = 0x0UL; // Memory-to-memory (FG fetch only)
DMA2D->FGPFCCR = LvglColorFormat;
DMA2D->FGPFCCR |= (RBS_BIT << DMA2D_FGPFCCR_RBS_Pos);
DMA2D->FGMAR = (uint32_t)(src_buf + (src_stride * src_offset->y) + src_offset->x);
DMA2D->FGOR = src_stride - draw_width;
DMA2D->FGCOLR = 0; // used in A4 and A8 modes only
_lv_gpu_stm32_dma2d_clean_cache(DMA2D->FGMAR, DMA2D->FGOR, draw_width, draw_height, sizeof(lv_color_t));
// Note BG* registers do not need to be set up since BG is not used
DMA2D->OPFCCR = LvglColorFormat;
DMA2D->OPFCCR |= (RBS_BIT << DMA2D_OPFCCR_RBS_Pos);
DMA2D->OMAR = (uint32_t)(dest_buf + (dest_stride * draw_area->y1) + draw_area->x1);
DMA2D->OOR = dest_stride - draw_width;
DMA2D->OCOLR = 0;
// PL - pixel per lines (14 bit), NL - number of lines (16 bit)
DMA2D->NLR = (draw_width << DMA2D_NLR_PL_Pos) | (draw_height << DMA2D_NLR_NL_Pos);
_lv_gpu_stm32_dma2d_start_dma_transfer();
}
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_start_dma_transfer(void)
{
LV_ASSERT_MSG(!isDma2dInProgess, "dma2d transfer has not finished");
isDma2dInProgess = true;
DMA2D->IFCR = 0x3FU; // trigger ISR flags reset
// Note: cleaning output buffer cache is needed only when buffer may be misaligned or adjacent area may have been drawn in sw-fashion, e.g. using lv_draw_sw_blend_basic()
#if LV_COLOR_DEPTH == 16
_lv_gpu_stm32_dma2d_clean_cache(DMA2D->OMAR, DMA2D->OOR, (DMA2D->NLR & DMA2D_NLR_PL_Msk) >> DMA2D_NLR_PL_Pos,
(DMA2D->NLR & DMA2D_NLR_NL_Msk) >> DMA2D_NLR_NL_Pos, sizeof(lv_color_t));
#endif
DMA2D->CR |= DMA2D_CR_START;
// Note: for some reason mask buffer gets damaged during transfer if waiting is postponed
_lv_gpu_stm32_dma2d_await_dma_transfer_finish(NULL); // FIXME: this line should not be needed here, but it is
}
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_await_dma_transfer_finish(lv_disp_drv_t * disp_drv)
{
if(disp_drv && disp_drv->wait_cb) {
while((DMA2D->CR & DMA2D_CR_START) != 0U) {
disp_drv->wait_cb(disp_drv);
}
}
else {
while((DMA2D->CR & DMA2D_CR_START) != 0U);
}
__IO uint32_t isrFlags = DMA2D->ISR;
if(isrFlags & DMA2D_ISR_CEIF) {
LV_LOG_ERROR("DMA2D config error");
}
if(isrFlags & DMA2D_ISR_TEIF) {
LV_LOG_ERROR("DMA2D transfer error");
}
DMA2D->IFCR = 0x3FU; // trigger ISR flags reset
if(isDma2dInProgess) {
// invalidate output buffer cached memory ONLY after DMA2D transfer
//_lv_gpu_stm32_dma2d_invalidate_cache(DMA2D->OMAR, DMA2D->OOR, (DMA2D->NLR & DMA2D_NLR_PL_Msk) >> DMA2D_NLR_PL_Pos, (DMA2D->NLR & DMA2D_NLR_NL_Msk) >> DMA2D_NLR_NL_Pos, sizeof(lv_color_t));
isDma2dInProgess = false;
}
}
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_invalidate_cache(uint32_t address, lv_coord_t offset, lv_coord_t width,
lv_coord_t height, uint8_t pixel_size)
{
if(((SCB->CCR) & SCB_CCR_DC_Msk) == 0) return; // L1 data cache is disabled
uint16_t stride = pixel_size * (width + offset); // in bytes
uint16_t ll = pixel_size * width; // line length in bytes
uint32_t n = 0; // address of the next cache row after the last invalidated row
lv_coord_t h = 0;
__DSB();
while(h < height) {
uint32_t a = address + (h * stride);
uint32_t e = a + ll; // end address, address of the first byte after the current line
a &= ~(CACHE_ROW_SIZE - 1U);
if(a < n) a = n; // prevent the previous last cache row from being invalidated again
while(a < e) {
SCB->DCIMVAC = a;
a += CACHE_ROW_SIZE;
}
n = a;
h++;
};
__DSB();
__ISB();
}
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_clean_cache(uint32_t address, lv_coord_t offset, lv_coord_t width,
lv_coord_t height, uint8_t pixel_size)
{
if(((SCB->CCR) & SCB_CCR_DC_Msk) == 0) return; // L1 data cache is disabled
uint16_t stride = pixel_size * (width + offset); // in bytes
uint16_t ll = pixel_size * width; // line length in bytes
uint32_t n = 0; // address of the next cache row after the last cleaned row
lv_coord_t h = 0;
__DSB();
while(h < height) {
uint32_t a = address + (h * stride);
uint32_t e = a + ll; // end address, address of the first byte after the current line
a &= ~(CACHE_ROW_SIZE - 1U);
if(a < n) a = n; // prevent the previous last cache row from being cleaned again
while(a < e) {
SCB->DCCMVAC = a;
a += CACHE_ROW_SIZE;
}
n = a;
h++;
};
__DSB();
__ISB();
}
// initialize µs timer
LV_STM32_DMA2D_STATIC bool _lv_gpu_stm32_dwt_init(void)
{
// disable TRC
CoreDebug->DEMCR &= ~CoreDebug_DEMCR_TRCENA_Msk;
// enable TRC
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
DWT->LAR = 0xC5ACCE55;
// disable clock cycle counter
DWT->CTRL &= ~DWT_CTRL_CYCCNTENA_Msk;
// enable clock cycle counter
DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
// reset the clock cycle counter value
DWT->CYCCNT = 0;
// 3 NO OPERATION instructions
__ASM volatile("NOP");
__ASM volatile("NOP");
__ASM volatile("NOP");
// check if clock cycle counter has started
if(DWT->CYCCNT) {
return true; // clock cycle counter started
}
else {
return false; // clock cycle counter not started
}
}
// get elapsed µs since reset
LV_STM32_DMA2D_STATIC uint32_t _lv_gpu_stm32_dwt_get_us(void)
{
uint32_t us = (DWT->CYCCNT * 1000000) / HAL_RCC_GetHCLKFreq();
return us;
}
// reset µs timer
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dwt_reset(void)
{
DWT->CYCCNT = 0;
}
#endif

77
src/draw/stm32_dma2d/lv_gpu_stm32_dma2d.h
View File

@@ -10,52 +10,83 @@
extern "C" {
#endif
/*********************
* INCLUDES
*********************/
#include "../../misc/lv_color.h"
#include "../../hal/lv_hal_disp.h"
#include "../sw/lv_draw_sw.h"
#if LV_USE_GPU_STM32_DMA2D
/*********************
* INCLUDES
*********************/
#include LV_GPU_DMA2D_CMSIS_INCLUDE
/*********************
* DEFINES
*********************/
#define LV_DMA2D_ARGB8888 0
#define LV_DMA2D_RGB888 1
#define LV_DMA2D_RGB565 2
#define LV_DMA2D_ARGB1555 3
#define LV_DMA2D_ARGB4444 4
#if defined(LV_STM32_DMA2D_TEST)
// removes "static" modifier for some internal methods in order to test them
#define LV_STM32_DMA2D_STATIC
#else
#define LV_STM32_DMA2D_STATIC static
#endif
/**********************
* TYPEDEFS
**********************/
enum dma2d_color_format {
ARGB8888 = 0x0,
RGB888 = 0x01,
RGB565 = 0x02,
ARGB1555 = 0x03,
ARGB4444 = 0x04,
A8 = 0x09,
UNSUPPORTED = 0xff,
};
typedef enum dma2d_color_format dma2d_color_format_t;
typedef lv_draw_sw_ctx_t lv_draw_stm32_dma2d_ctx_t;
struct _lv_disp_drv_t;
/**********************
* GLOBAL PROTOTYPES
**********************/
/**
* Turn on the peripheral and set output color mode, this only needs to be done once
*/
void lv_draw_stm32_dma2d_init(void);
void lv_draw_stm32_dma2d_ctx_init(struct _lv_disp_drv_t * drv, lv_draw_ctx_t * draw_ctx);
void lv_draw_stm32_dma2d_ctx_deinit(struct _lv_disp_drv_t * drv, lv_draw_ctx_t * draw_ctx);
static void lv_draw_stm32_dma2d_blend(lv_draw_ctx_t * draw_ctx, const lv_draw_sw_blend_dsc_t * dsc);
static void lv_draw_stm32_dma2d_buffer_copy(lv_draw_ctx_t * draw_ctx,
void * dest_buf, lv_coord_t dest_stride, const lv_area_t * dest_area,
void * src_buf, lv_coord_t src_stride, const lv_area_t * src_area);
static lv_res_t lv_draw_stm32_dma2d_img(lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * img_dsc,
const lv_area_t * src_area, const void * src);
static void lv_gpu_stm32_dma2d_wait_cb(lv_draw_ctx_t * draw_ctx);
static void lv_draw_stm32_dma2d_img_decoded(lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * img_dsc,
const lv_area_t * coords, const uint8_t * src_buf, lv_img_cf_t color_format);
static dma2d_color_format_t lv_color_format_to_dma2d_color_format(lv_img_cf_t color_format);
static lv_point_t lv_area_get_offset(const lv_area_t * area1, const lv_area_t * area2);
void lv_draw_stm32_dma2d_blend(lv_draw_ctx_t * draw_ctx, const lv_draw_sw_blend_dsc_t * dsc);
void lv_draw_stm32_dma2d_buffer_copy(lv_draw_ctx_t * draw_ctx,
void * dest_buf, lv_coord_t dest_stride, const lv_area_t * dest_area,
void * src_buf, lv_coord_t src_stride, const lv_area_t * src_area);
void lv_gpu_stm32_dma2d_wait_cb(lv_draw_ctx_t * draw_ctx);
/**********************
* STATIC PROTOTYPES
**********************/
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_blend_fill(const lv_color_t * dst_buf, lv_coord_t dst_stride,
const lv_area_t * draw_area, lv_color_t color, lv_opa_t opa);
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_blend_map(const lv_color_t * dest_buf, lv_coord_t dest_stride,
const lv_area_t * draw_area, const void * src_buf, lv_coord_t src_stride, const lv_point_t * src_offset, lv_opa_t opa,
dma2d_color_format_t src_color_format, bool ignore_src_alpha);
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_blend_paint(const lv_color_t * dst_buf, lv_coord_t dst_stride,
const lv_area_t * draw_area, const lv_opa_t * mask_buf, lv_coord_t mask_stride, const lv_point_t * mask_offset,
lv_color_t color, lv_opa_t opa);
LV_STM32_DMA2D_STATIC void _lv_draw_stm32_dma2d_copy_buffer(const lv_color_t * dest_buf, lv_coord_t dest_stride,
const lv_area_t * draw_area, const lv_color_t * src_buf, lv_coord_t src_stride, const lv_point_t * src_offset);
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_await_dma_transfer_finish(lv_disp_drv_t * disp_drv);
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_start_dma_transfer(void);
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_invalidate_cache(uint32_t address, lv_coord_t offset,
lv_coord_t width, lv_coord_t height, uint8_t pixel_size);
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dma2d_clean_cache(uint32_t address, lv_coord_t offset, lv_coord_t width,
lv_coord_t height, uint8_t pixel_size);
LV_STM32_DMA2D_STATIC bool _lv_gpu_stm32_dwt_init(void);
LV_STM32_DMA2D_STATIC void _lv_gpu_stm32_dwt_reset(void);
LV_STM32_DMA2D_STATIC uint32_t _lv_gpu_stm32_dwt_get_us(void);
/**********************
* MACROS