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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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4
kitty/cursor.c
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@@ -136,7 +136,7 @@ END_ALLOW_CASE_RANGE
}
void
apply_sgr_to_cells(Cell *first_cell, unsigned int cell_count, unsigned int *params, unsigned int count) {
apply_sgr_to_cells(GPUCell *first_cell, unsigned int cell_count, unsigned int *params, unsigned int count) {
#define RANGE for(unsigned c = 0; c < cell_count; c++, cell++)
#define SET(shift) RANGE { cell->attrs |= (1 << shift); } break;
#define RESET(shift) RANGE { cell->attrs &= ~(1 << shift); } break;
@@ -148,7 +148,7 @@ apply_sgr_to_cells(Cell *first_cell, unsigned int cell_count, unsigned int *para
unsigned int i = 0, attr;
if (!count) { params[0] = 0; count = 1; }
while (i < count) {
Cell *cell = first_cell;
GPUCell *cell = first_cell;
attr = params[i++];
switch(attr) {
case 0: