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cog: Fix the virtual frame line cache

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This commit is contained in:
David Schleef 2009-09-21 09:30:44 -07:00
parent e34ea433d5
commit 213cc0b06d
2 changed files with 20 additions and 20 deletions
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1
ext/cog/cogframe.h
View file

@ -86,6 +86,7 @@ struct _CogFrame {
CogFrameData components[3];
int is_virtual;
int cache_offset[3];
int cached_lines[3][COG_FRAME_CACHE_SIZE];
CogFrame *virt_frame1;
CogFrame *virt_frame2;

39
ext/cog/cogvirtframe.c
View file

@ -53,8 +53,9 @@ cog_frame_new_virtual (CogMemoryDomain * domain, CogFrameFormat format,
frame->regions[0] =
malloc (frame->components[0].stride * COG_FRAME_CACHE_SIZE);
for (i = 0; i < COG_FRAME_CACHE_SIZE; i++) {
frame->cached_lines[0][i] = -1;
frame->cached_lines[0][i] = 0;
}
frame->cache_offset[0] = 0;
frame->is_virtual = TRUE;
return frame;
@ -114,8 +115,9 @@ cog_frame_new_virtual (CogMemoryDomain * domain, CogFrameFormat format,
frame->regions[i] = malloc (comp->stride * COG_FRAME_CACHE_SIZE);
for (j = 0; j < COG_FRAME_CACHE_SIZE; j++) {
frame->cached_lines[i][j] = -1;
frame->cached_lines[i][j] = 0;
}
frame->cache_offset[i] = 0;
}
frame->is_virtual = TRUE;
@ -127,8 +129,6 @@ cog_virt_frame_get_line (CogFrame * frame, int component, int i)
{
CogFrameData *comp = &frame->components[component];
int j;
int min;
int min_j;
g_return_val_if_fail (i >= 0, NULL);
g_return_val_if_fail (i < comp->height, NULL);
@ -137,27 +137,26 @@ cog_virt_frame_get_line (CogFrame * frame, int component, int i)
return COG_FRAME_DATA_GET_LINE (&frame->components[component], i);
}
for (j = 0; j < COG_FRAME_CACHE_SIZE; j++) {
if (frame->cached_lines[component][j] == i) {
return COG_OFFSET (frame->regions[component], comp->stride * j);
}
if (i < frame->cache_offset[component]) {
g_warning ("cache failure");
return NULL;
}
min_j = 0;
min = frame->cached_lines[component][0];
for (j = 1; j < COG_FRAME_CACHE_SIZE; j++) {
if (frame->cached_lines[component][j] < min) {
min = frame->cached_lines[component][j];
min_j = j;
}
while (i >= frame->cache_offset[component] + COG_FRAME_CACHE_SIZE) {
j = frame->cache_offset[component] & (COG_FRAME_CACHE_SIZE - 1);
frame->cached_lines[component][j] = 0;
frame->cache_offset[component]++;
}
frame->cached_lines[component][min_j] = i;
cog_virt_frame_render_line (frame,
COG_OFFSET (frame->regions[component], comp->stride * min_j),
component, i);
j = i & (COG_FRAME_CACHE_SIZE - 1);
if (!frame->cached_lines[component][j]) {
cog_virt_frame_render_line (frame,
COG_OFFSET (frame->regions[component], comp->stride * j), component, i);
frame->cached_lines[component][j] = 1;
}
return COG_OFFSET (frame->regions[component], comp->stride * min_j);
return COG_OFFSET (frame->regions[component], comp->stride * j);
}
void