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Reduce data sent to GPU per draw by 30%

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Split up the Cell structure into a CPUCell and a GPUCell. Only the
GPUCell part needs to be sent to the GPU. Should make kitty use even
less system resources and make a performance difference on systems where
the GPU bandwidth is constrained.

Also allows adding more CPU only data in the future without affecting
GPU bandwidth. For example, hyperlinks or more combining characters.
This commit is contained in:
Kovid Goyal
2018-05-27 21:25:09 +05:30
parent c8756612f7
commit 8dea5b3e3e
13 changed files with 256 additions and 212 deletions
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5
kitty/rewrap.h
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@@ -43,7 +43,8 @@
static inline void
copy_range(Line *src, index_type src_at, Line* dest, index_type dest_at, index_type num) {
memcpy(dest->cells + dest_at, src->cells + src_at, num * sizeof(Cell));
memcpy(dest->cpu_cells + dest_at, src->cpu_cells + src_at, num * sizeof(CPUCell));
memcpy(dest->gpu_cells + dest_at, src->gpu_cells + src_at, num * sizeof(GPUCell));
}
@@ -60,7 +61,7 @@ rewrap_inner(BufType *src, BufType *dest, const index_type src_limit, HistoryBuf
src_x_limit = src->xnum;
if (!src_line_is_continued) {
// Trim trailing blanks since there is a hard line break at the end of this line
while(src_x_limit && (src->line->cells[src_x_limit - 1].ch) == BLANK_CHAR) src_x_limit--;
while(src_x_limit && (src->line->cpu_cells[src_x_limit - 1].ch) == BLANK_CHAR) src_x_limit--;
}
if (is_tracked_line && *track_x >= src_x_limit) *track_x = MAX(1, src_x_limit) - 1;