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dwrite: Track a run this cluster came from.

This commit is contained in:
Nikolay Sivov 2015-04-23 13:02:43 +03:00 committed by Alexandre Julliard
parent 68edc995c5
commit d7a40fd298
1 changed files with 40 additions and 15 deletions
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53
dlls/dwrite/layout.c
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@ -139,6 +139,11 @@ struct layout_run {
} u;
};
struct layout_cluster {
const struct layout_run *run; /* link to run this cluster belongs to */
UINT32 position; /* relative to run, first cluster has 0 position */
};
enum layout_recompute_mask {
RECOMPUTE_NOMINAL_RUNS = 1 << 0,
RECOMPUTE_MINIMAL_WIDTH = 1 << 1,
@ -164,7 +169,8 @@ struct dwrite_textlayout {
DWRITE_LINE_BREAKPOINT *nominal_breakpoints;
DWRITE_LINE_BREAKPOINT *actual_breakpoints;
DWRITE_CLUSTER_METRICS *clusters;
struct layout_cluster *clusters;
DWRITE_CLUSTER_METRICS *clustermetrics;
UINT32 clusters_count;
FLOAT minwidth;
@ -420,9 +426,11 @@ static inline void init_cluster_metrics(const struct dwrite_textlayout *layout,
codepoint initially.
*/
static void layout_set_cluster_metrics(struct dwrite_textlayout *layout, const struct regular_layout_run *run, UINT32 *cluster)
static void layout_set_cluster_metrics(struct dwrite_textlayout *layout, const struct layout_run *r, UINT32 *cluster)
{
DWRITE_CLUSTER_METRICS *metrics = &layout->clusters[*cluster];
DWRITE_CLUSTER_METRICS *metrics = &layout->clustermetrics[*cluster];
struct layout_cluster *c = &layout->clusters[*cluster];
const struct regular_layout_run *run = &r->u.regular;
UINT32 i, start = 0;
for (i = 0; i < run->descr.stringLength; i++) {
@ -431,15 +439,20 @@ static void layout_set_cluster_metrics(struct dwrite_textlayout *layout, const s
if (run->descr.clusterMap[start] != run->descr.clusterMap[i]) {
init_cluster_metrics(layout, run, run->descr.clusterMap[start], run->descr.clusterMap[i], i, metrics);
metrics->length = i - start;
c->position = start;
c->run = r;
*cluster += 1;
metrics++;
c++;
start = i;
}
if (end) {
init_cluster_metrics(layout, run, run->descr.clusterMap[start], run->run.glyphCount, i, metrics);
metrics->length = i - start + 1;
c->position = start;
c->run = r;
*cluster += 1;
return;
@ -456,11 +469,18 @@ static HRESULT layout_compute_runs(struct dwrite_textlayout *layout)
HRESULT hr;
free_layout_runs(layout);
/* Cluster data arrays are allocated once, assuming one text position per cluster. */
if (!layout->clustermetrics) {
layout->clustermetrics = heap_alloc(layout->len*sizeof(*layout->clustermetrics));
layout->clusters = heap_alloc(layout->len*sizeof(*layout->clusters));
if (!layout->clustermetrics || !layout->clusters) {
heap_free(layout->clustermetrics);
heap_free(layout->clusters);
layout->clusters_count = 0;
layout->clusters = heap_alloc(layout->len*sizeof(DWRITE_CLUSTER_METRICS));
if (!layout->clusters)
return E_OUTOFMEMORY;
}
}
layout->clusters_count = 0;
hr = get_textanalyzer(&analyzer);
if (FAILED(hr))
@ -508,7 +528,8 @@ static HRESULT layout_compute_runs(struct dwrite_textlayout *layout)
/* we need to do very little in case of inline objects */
if (r->kind == LAYOUT_RUN_INLINE) {
DWRITE_CLUSTER_METRICS *metrics = &layout->clusters[cluster];
DWRITE_CLUSTER_METRICS *metrics = &layout->clustermetrics[cluster];
struct layout_cluster *c = &layout->clusters[cluster];
DWRITE_INLINE_OBJECT_METRICS inlinemetrics;
metrics->width = 0.0;
@ -519,6 +540,8 @@ static HRESULT layout_compute_runs(struct dwrite_textlayout *layout)
metrics->isSoftHyphen = FALSE;
metrics->isRightToLeft = FALSE;
metrics->padding = 0;
c->run = r;
c->position = 0; /* there's always one cluster per inline object, so 0 is valid value */
cluster++;
/* TODO: is it fatal if GetMetrics() fails? */
@ -630,7 +653,7 @@ static HRESULT layout_compute_runs(struct dwrite_textlayout *layout)
run->run.glyphAdvances = run->advances;
run->run.glyphOffsets = run->offsets;
layout_set_cluster_metrics(layout, run, &cluster);
layout_set_cluster_metrics(layout, r, &cluster);
continue;
@ -1203,6 +1226,7 @@ static ULONG WINAPI dwritetextlayout_Release(IDWriteTextLayout2 *iface)
release_format_data(&This->format);
heap_free(This->nominal_breakpoints);
heap_free(This->actual_breakpoints);
heap_free(This->clustermetrics);
heap_free(This->clusters);
heap_free(This->str);
heap_free(This);
@ -1817,7 +1841,7 @@ static HRESULT WINAPI dwritetextlayout_GetClusterMetrics(IDWriteTextLayout2 *ifa
return hr;
if (metrics)
memcpy(metrics, This->clusters, sizeof(DWRITE_CLUSTER_METRICS)*min(max_count, This->clusters_count));
memcpy(metrics, This->clustermetrics, sizeof(DWRITE_CLUSTER_METRICS)*min(max_count, This->clusters_count));
*count = This->clusters_count;
return max_count >= This->clusters_count ? S_OK : E_NOT_SUFFICIENT_BUFFER;
@ -1827,11 +1851,11 @@ static HRESULT WINAPI dwritetextlayout_GetClusterMetrics(IDWriteTextLayout2 *ifa
too hard to break. */
static inline BOOL is_terminal_cluster(struct dwrite_textlayout *layout, UINT32 index)
{
if (layout->clusters[index].isWhitespace || layout->clusters[index].isNewline ||
if (layout->clustermetrics[index].isWhitespace || layout->clustermetrics[index].isNewline ||
(index == layout->clusters_count - 1))
return TRUE;
/* check next one */
return (index < layout->clusters_count - 1) && layout->clusters[index+1].isWhitespace;
return (index < layout->clusters_count - 1) && layout->clustermetrics[index+1].isWhitespace;
}
static HRESULT WINAPI dwritetextlayout_DetermineMinWidth(IDWriteTextLayout2 *iface, FLOAT* min_width)
@ -1856,17 +1880,17 @@ static HRESULT WINAPI dwritetextlayout_DetermineMinWidth(IDWriteTextLayout2 *ifa
for (i = 0; i < This->clusters_count;) {
if (is_terminal_cluster(This, i)) {
width = This->clusters[i].width;
width = This->clustermetrics[i].width;
i++;
}
else {
width = 0.0;
while (!is_terminal_cluster(This, i)) {
width += This->clusters[i].width;
width += This->clustermetrics[i].width;
i++;
}
/* count last one too */
width += This->clusters[i].width;
width += This->clustermetrics[i].width;
}
if (width > This->minwidth)
@ -2716,6 +2740,7 @@ static HRESULT init_textlayout(const WCHAR *str, UINT32 len, IDWriteTextFormat *
layout->nominal_breakpoints = NULL;
layout->actual_breakpoints = NULL;
layout->clusters_count = 0;
layout->clustermetrics = NULL;
layout->clusters = NULL;
layout->minwidth = 0.0;
list_init(&layout->runs);