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ports/stm32: Fully implement N6 GPU driver for draw_image.
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@ -35,7 +35,6 @@
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#if OMV_GPU_NEMA
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#include "nema_core.h"
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#include "nema_vg.h"
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#include "nema_error.h"
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#endif
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@ -53,21 +52,38 @@ int omv_gpu_init() {
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}
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void omv_gpu_deinit() {
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}
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uint32_t OMV_ATTR_SECTION(OMV_ATTR_ALIGNED(CLUT_BUFFER[256], 32), ".dma_buffer");
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#if OMV_GPU_NEMA
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// Not documented anywhere but this is how NEMA expects the CLUT index to be calculated.
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#define NEMA_CLUT_INDEX(i) (((i << 4) | (i >> 4)) & 0xFF)
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static void omv_gpu_load_clut(const uint16_t *color_palette, const uint8_t *alpha_palette) {
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for (int i = 0; i < 256; i++) {
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int r, g, b;
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if (color_palette) {
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int pixel = color_palette[i];
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r = COLOR_RGB565_TO_R8(pixel);
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g = COLOR_RGB565_TO_G8(pixel);
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b = COLOR_RGB565_TO_B8(pixel);
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} else {
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r = g = b = i;
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}
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int a = (alpha_palette) ? alpha_palette[i] : 255;
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CLUT_BUFFER[NEMA_CLUT_INDEX(i)] = nema_rgba(r, g, b, a);
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}
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}
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static nema_tex_format_t omv_gpu_pixfmt(uint32_t omv_pixfmt) {
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switch (omv_pixfmt) {
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case PIXFORMAT_BINARY:
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return NEMA_L1; // source only
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case PIXFORMAT_BAYER_ANY:
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case PIXFORMAT_GRAYSCALE:
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return NEMA_L8;
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case PIXFORMAT_RGB565:
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return NEMA_RGB565;
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}
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mp_raise_msg(&mp_type_ValueError, MP_ERROR_TEXT("Pixel format is not supported"));
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__builtin_unreachable();
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}
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int omv_gpu_draw_image(image_t *src_img,
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@ -79,7 +95,27 @@ int omv_gpu_draw_image(image_t *src_img,
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const uint8_t *alpha_palette,
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image_hint_t hint) {
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OMV_PROFILE_START();
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if (color_palette || alpha_palette) {
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// GPU2D can only draw on RGB565/GRAYSCALE buffers.
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if ((dst_img->pixfmt != PIXFORMAT_RGB565) && (dst_img->pixfmt != PIXFORMAT_GRAYSCALE)) {
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return -1;
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}
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// GPU2D can only read from RGB565 or GRAYSCALE buffers.
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// If the source image is RGB565, it must not have a color or alpha palette.
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if ((src_img->pixfmt != PIXFORMAT_GRAYSCALE) &&
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((src_img->pixfmt != PIXFORMAT_RGB565) || color_palette || alpha_palette)) {
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return -1;
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}
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// If the source format is grayscale with a color/alpha palette bilinear scaling is not supported.
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if ((src_img->pixfmt == PIXFORMAT_GRAYSCALE) && (hint & IMAGE_HINT_BILINEAR) &&
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(color_palette || alpha_palette)) {
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return -1;
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}
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// GPU2D cannot handle generic hmirror or vflip.
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if (hint & (IMAGE_HINT_HMIRROR | IMAGE_HINT_VFLIP)) {
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return -1;
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}
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@ -94,39 +130,46 @@ int omv_gpu_draw_image(image_t *src_img,
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#else
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nema_cmdlist_t cl = nema_cl_create_sized(OMV_GPU_NEMA_BUFFER_SIZE);
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#endif
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// Bind command list.
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nema_cl_bind_circular(&cl);
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nema_tex_mode_t blit_mode;
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if (hint & IMAGE_HINT_BILINEAR) {
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blit_mode = NEMA_FILTER_BL;
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} else {
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blit_mode = NEMA_FILTER_PS;
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}
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// Set up destination texture.
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nema_tex_format_t dst_pixfmt = omv_gpu_pixfmt(dst_img->pixfmt);
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nema_bind_dst_tex((uintptr_t) dst_img->data, dst_img->w, dst_img->h, dst_pixfmt, -1);
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// Set up source texture.
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nema_tex_format_t src_pixfmt = omv_gpu_pixfmt(src_img->pixfmt);
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nema_bind_src_tex((uintptr_t) src_img->data, src_img->w, src_img->h, src_pixfmt, -1, blit_mode);
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nema_tex_mode_t blit_mode = (hint & IMAGE_HINT_BILINEAR) ? NEMA_FILTER_BL : NEMA_FILTER_PS;
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uint32_t blops = NEMA_BLOP_MODULATE_A;
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if (alpha_palette || color_palette) {
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omv_gpu_load_clut(color_palette, alpha_palette);
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blops |= NEMA_BLOP_LUT;
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nema_bind_lut_tex((uintptr_t) src_img->data, src_img->w, src_img->h, NEMA_L8, -1,
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NEMA_FILTER_PS, (uintptr_t) CLUT_BUFFER, NEMA_RGBA8888);
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} else {
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nema_tex_format_t src_pixfmt = omv_gpu_pixfmt(src_img->pixfmt);
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nema_bind_src_tex((uintptr_t) src_img->data, src_img->w, src_img->h, src_pixfmt, -1, blit_mode);
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}
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// Configure operations.
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nema_set_blend_blit(NEMA_BL_SRC);
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uint32_t dst_bf = (hint & IMAGE_HINT_BLACK_BACKGROUND) ? NEMA_BF_ZERO : NEMA_BF_INVSRCALPHA;
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nema_set_blend_blit(nema_blending_mode(NEMA_BF_SRCALPHA, dst_bf, blops));
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nema_set_const_color(nema_rgba(0, 0, 0, alpha));
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nema_set_clip(dst_rect->x, dst_rect->y, dst_rect->w, dst_rect->h);
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nema_blit_subrect_fit(dst_rect->x, dst_rect->y, dst_rect->w, dst_rect->h,
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src_rect->x, src_rect->y, src_rect->w, src_rect->h);
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// Ensures any cached writes to dst are flushed.
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SCB_CleanInvalidateDCache_by_Addr(dst_img->data, image_size(dst_img));
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// Flush source image
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SCB_CleanDCache_by_Addr(src_img->data, image_size(src_img));
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// Ensure the GPU cache is clean before starting the GPU operation.
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// Will start invalidating the GPU cache if not already invalidated.
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HAL_ICACHE_WaitForInvalidateComplete();
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nema_cl_submit(&cl);
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nema_cl_wait(&cl);
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#if !OMV_GPU_NEMA_MM_STATIC
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nema_cl_destroy(&cl);
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#endif
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@ -134,14 +177,13 @@ int omv_gpu_draw_image(image_t *src_img,
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// Start invalidation of the GPU cache for the next operation.
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// This is done asynchronously so that the CPU can continue working.
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HAL_ICACHE_Invalidate_IT();
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// Invalidate the destination image.
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SCB_InvalidateDCache_by_Addr(dst_img->data, image_size(dst_img));
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OMV_PROFILE_PRINT();
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return 0;
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}
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#else
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uint32_t OMV_ATTR_SECTION(OMV_ATTR_ALIGNED(CLUT_BUFFER[256], 32), ".dma_buffer");
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int omv_gpu_draw_image(image_t *src_img,
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rectangle_t *src_rect,
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image_t *dst_img,
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