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Bug 1196 - Texture border drawing problems
* clutter/cogl/gl/cogl-texture.c (_cogl_texture_upload_subregion_to_gl) (_cogl_texture_upload_to_gl): * clutter/cogl/gles/cogl-texture.c (_cogl_texture_upload_to_gl) (_cogl_texture_upload_subregion_to_gl): When uploading data to a sliced texture, fill the waste pixels with copies of the edge of the real texture data. Otherwise the value of the waste pixels are undefined so it will show artifacts when the texture is scaled with GL_LINEAR and the pixels are blended in.
This commit is contained in:
Neil Roberts
parent
73b6bd2f17
commit
e43b7ddd3d
16
ChangeLog
16
ChangeLog
@ -1,3 +1,19 @@
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2008-10-27 Neil Roberts <neil@linux.intel.com>
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Bug 1196 - Texture border drawing problems
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* clutter/cogl/gl/cogl-texture.c (_cogl_texture_upload_subregion_to_gl)
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(_cogl_texture_upload_to_gl):
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* clutter/cogl/gles/cogl-texture.c (_cogl_texture_upload_to_gl)
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(_cogl_texture_upload_subregion_to_gl):
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When uploading data to a sliced texture, fill the waste pixels
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with copies of the edge of the real texture data. Otherwise the
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value of the waste pixels are undefined so it will show artifacts
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when the texture is scaled with GL_LINEAR and the pixels are
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blended in.
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2008-10-22 Thomas Wood <thomas@linux.intel.com>
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* tests/test-actors.c: Don't adjust the radius based on the number of
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@ -212,6 +212,35 @@ _cogl_subregion_gl_store_rules (gint bmp_rowstride,
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GE( glPixelStorei (SKIP_PIXELS, src_x) );
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}
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static guchar *
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_cogl_texture_allocate_waste_buffer (CoglTexture *tex)
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{
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CoglTexSliceSpan *last_x_span;
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CoglTexSliceSpan *last_y_span;
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guchar *waste_buf = NULL;
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/* If the texture has any waste then allocate a buffer big enough to
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fill the gaps */
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last_x_span = &g_array_index (tex->slice_x_spans, CoglTexSliceSpan,
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tex->slice_x_spans->len - 1);
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last_y_span = &g_array_index (tex->slice_y_spans, CoglTexSliceSpan,
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tex->slice_y_spans->len - 1);
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if (last_x_span->waste > 0 || last_y_span->waste > 0)
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{
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gint bpp = _cogl_get_format_bpp (tex->bitmap.format);
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CoglTexSliceSpan *first_x_span
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= &g_array_index (tex->slice_x_spans, CoglTexSliceSpan, 0);
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CoglTexSliceSpan *first_y_span
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= &g_array_index (tex->slice_y_spans, CoglTexSliceSpan, 0);
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guint right_size = first_y_span->size * last_x_span->waste;
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guint bottom_size = first_x_span->size * last_y_span->waste;
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waste_buf = g_malloc (MAX (right_size, bottom_size) * bpp);
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}
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return waste_buf;
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}
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static gboolean
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_cogl_texture_upload_to_gl (CoglTexture *tex)
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{
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@ -220,9 +249,12 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
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GLuint gl_handle;
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gint bpp;
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gint x,y;
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guchar *waste_buf;
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bpp = _cogl_get_format_bpp (tex->bitmap.format);
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waste_buf = _cogl_texture_allocate_waste_buffer (tex);
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/* Iterate vertical slices */
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for (y = 0; y < tex->slice_y_spans->len; ++y)
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{
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@ -253,9 +285,78 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
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y_span->size - y_span->waste,
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tex->gl_format, tex->gl_type,
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tex->bitmap.data) );
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/* Fill the waste with a copies of the rightmost pixels */
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if (x_span->waste > 0)
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{
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const guchar *src = tex->bitmap.data
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+ y_span->start * tex->bitmap.rowstride
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+ (x_span->start + x_span->size - x_span->waste - 1) * bpp;
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guchar *dst = waste_buf;
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guint wx, wy;
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for (wy = 0; wy < y_span->size - y_span->waste; wy++)
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{
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for (wx = 0; wx < x_span->waste; wx++)
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{
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memcpy (dst, src, bpp);
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dst += bpp;
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}
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src += tex->bitmap.rowstride;
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}
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_cogl_subregion_gl_store_rules (x_span->waste * bpp,
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x_span->waste,
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bpp,
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0, 0, FALSE);
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GE( glTexSubImage2D (tex->gl_target, 0,
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x_span->size - x_span->waste, 0,
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x_span->waste,
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y_span->size - y_span->waste,
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tex->gl_format, tex->gl_type,
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waste_buf) );
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}
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if (y_span->waste > 0)
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{
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const guchar *src = tex->bitmap.data
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+ ((y_span->start + y_span->size - y_span->waste - 1)
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* tex->bitmap.rowstride)
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+ x_span->start * bpp;
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guchar *dst = waste_buf;
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guint wy, wx;
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for (wy = 0; wy < y_span->waste; wy++)
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{
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memcpy (dst, src, (x_span->size - x_span->waste) * bpp);
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dst += (x_span->size - x_span->waste) * bpp;
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for (wx = 0; wx < x_span->waste; wx++)
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{
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memcpy (dst, dst - bpp, bpp);
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dst += bpp;
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}
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}
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_cogl_subregion_gl_store_rules (x_span->size * bpp,
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x_span->size,
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bpp,
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0, 0, FALSE);
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GE( glTexSubImage2D (tex->gl_target, 0,
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0, y_span->size - y_span->waste,
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x_span->size,
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y_span->waste,
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tex->gl_format, tex->gl_type,
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waste_buf) );
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}
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}
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}
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if (waste_buf)
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g_free (waste_buf);
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return TRUE;
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}
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@ -374,16 +475,21 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
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GLuint source_gl_format,
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GLuint source_gl_type)
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{
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gint bpp;
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CoglSpanIter x_iter;
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CoglSpanIter y_iter;
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GLuint gl_handle;
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gint source_x = 0, source_y = 0;
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gint inter_w = 0, inter_h = 0;
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gint local_x = 0, local_y = 0;
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CoglTexSliceSpan *x_span;
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CoglTexSliceSpan *y_span;
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gint bpp;
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CoglSpanIter x_iter;
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CoglSpanIter y_iter;
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GLuint gl_handle;
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gint source_x = 0, source_y = 0;
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gint inter_w = 0, inter_h = 0;
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gint local_x = 0, local_y = 0;
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guchar *waste_buf;
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bpp = _cogl_get_format_bpp (source_bmp->format);
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waste_buf = _cogl_texture_allocate_waste_buffer (tex);
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/* Iterate vertical spans */
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for (source_y = src_y,
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_cogl_span_iter_begin (&y_iter, tex->slice_y_spans,
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@ -402,6 +508,9 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
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continue;
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}
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y_span = &g_array_index (tex->slice_y_spans, CoglTexSliceSpan,
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y_iter.index);
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/* Iterate horizontal spans */
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for (source_x = src_x,
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_cogl_span_iter_begin (&x_iter, tex->slice_x_spans,
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@ -420,6 +529,9 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
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continue;
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}
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x_span = &g_array_index (tex->slice_x_spans, CoglTexSliceSpan,
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x_iter.index);
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/* Pick intersection width and height */
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inter_w = CLUTTER_FIXED_TO_INT (x_iter.intersect_end -
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x_iter.intersect_start);
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@ -455,9 +567,96 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
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source_gl_format,
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source_gl_type,
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source_bmp->data) );
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/* If the x_span is sliced and the upload touches the
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rightmost pixels then fill the waste with copies of the
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pixels */
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if (x_span->waste > 0
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&& local_x < x_span->size - x_span->waste
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&& local_x + inter_w >= x_span->size - x_span->waste)
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{
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const guchar *src = source_bmp->data
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+ (src_y + CLUTTER_FIXED_TO_INT (y_iter.intersect_start)
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- dst_y) * source_bmp->rowstride
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+ (src_x + x_span->start + x_span->size - x_span->waste
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- dst_x - 1) * bpp;
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guchar *dst = waste_buf;
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guint wx, wy;
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for (wy = 0; wy < inter_h; wy++)
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{
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for (wx = 0; wx < x_span->waste; wx++)
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{
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memcpy (dst, src, bpp);
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dst += bpp;
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}
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src += source_bmp->rowstride;
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}
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_cogl_subregion_gl_store_rules (x_span->waste * bpp,
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x_span->waste,
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bpp,
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0, 0, FALSE);
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GE( glTexSubImage2D (tex->gl_target, 0,
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x_span->size - x_span->waste, local_y,
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x_span->waste,
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inter_h,
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source_gl_format,
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source_gl_type,
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waste_buf) );
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}
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/* same for the bottom-most pixels */
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if (y_span->waste > 0
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&& local_y < y_span->size - y_span->waste
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&& local_y + inter_h >= y_span->size - y_span->waste)
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{
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const guchar *src = source_bmp->data
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+ (src_x + CLUTTER_FIXED_TO_INT (x_iter.intersect_start)
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- dst_x) * bpp
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+ (src_y + y_span->start + y_span->size - y_span->waste
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- dst_y - 1) * source_bmp->rowstride;
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guchar *dst = waste_buf;
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guint wy, wx;
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guint copy_width;
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if (local_x + inter_w >= x_span->size - x_span->waste)
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copy_width = x_span->size - local_x;
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else
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copy_width = inter_w;
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for (wy = 0; wy < y_span->waste; wy++)
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{
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memcpy (dst, src, inter_w * bpp);
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dst += inter_w * bpp;
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for (wx = inter_w; wx < copy_width; wx++)
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{
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memcpy (dst, dst - bpp, bpp);
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dst += bpp;
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}
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}
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_cogl_subregion_gl_store_rules (copy_width * bpp,
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copy_width,
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bpp,
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0, 0, FALSE);
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GE( glTexSubImage2D (tex->gl_target, 0,
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local_x, y_span->size - y_span->waste,
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copy_width,
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y_span->waste,
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source_gl_format,
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source_gl_type,
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waste_buf) );
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}
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}
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}
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if (waste_buf)
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g_free (waste_buf);
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return TRUE;
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}
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@ -174,6 +174,35 @@ _cogl_span_iter_end (CoglSpanIter *iter)
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return iter->pos >= iter->cover_end;
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}
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static guchar *
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_cogl_texture_allocate_waste_buffer (CoglTexture *tex)
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{
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CoglTexSliceSpan *last_x_span;
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CoglTexSliceSpan *last_y_span;
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guchar *waste_buf = NULL;
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/* If the texture has any waste then allocate a buffer big enough to
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fill the gaps */
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last_x_span = &g_array_index (tex->slice_x_spans, CoglTexSliceSpan,
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tex->slice_x_spans->len - 1);
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last_y_span = &g_array_index (tex->slice_y_spans, CoglTexSliceSpan,
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tex->slice_y_spans->len - 1);
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if (last_x_span->waste > 0 || last_y_span->waste > 0)
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{
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gint bpp = _cogl_get_format_bpp (tex->bitmap.format);
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CoglTexSliceSpan *first_x_span
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= &g_array_index (tex->slice_x_spans, CoglTexSliceSpan, 0);
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CoglTexSliceSpan *first_y_span
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= &g_array_index (tex->slice_y_spans, CoglTexSliceSpan, 0);
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guint right_size = first_y_span->size * last_x_span->waste;
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guint bottom_size = first_x_span->size * last_y_span->waste;
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waste_buf = g_malloc (MAX (right_size, bottom_size) * bpp);
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}
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return waste_buf;
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}
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static gboolean
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_cogl_texture_upload_to_gl (CoglTexture *tex)
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{
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@ -182,6 +211,7 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
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GLuint gl_handle;
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gint bpp;
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gint x,y;
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guchar *waste_buf;
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CoglBitmap slice_bmp;
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/* FIXME: might optimize by not copying to intermediate slice
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@ -190,6 +220,8 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
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bpp = _cogl_get_format_bpp (tex->bitmap.format);
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waste_buf = _cogl_texture_allocate_waste_buffer (tex);
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/* Iterate vertical slices */
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for (y = 0; y < tex->slice_y_spans->len; ++y)
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{
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@ -233,6 +265,62 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
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tex->gl_format, tex->gl_type,
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slice_bmp.data) );
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/* Fill the waste with a copies of the rightmost pixels */
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if (x_span->waste > 0)
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{
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const guchar *src = tex->bitmap.data
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+ y_span->start * tex->bitmap.rowstride
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+ (x_span->start + x_span->size - x_span->waste - 1) * bpp;
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guchar *dst = waste_buf;
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guint wx, wy;
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for (wy = 0; wy < y_span->size - y_span->waste; wy++)
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{
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for (wx = 0; wx < x_span->waste; wx++)
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{
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memcpy (dst, src, bpp);
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dst += bpp;
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}
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src += tex->bitmap.rowstride;
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}
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GE( glTexSubImage2D (tex->gl_target, 0,
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x_span->size - x_span->waste, 0,
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x_span->waste,
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y_span->size - y_span->waste,
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tex->gl_format, tex->gl_type,
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waste_buf) );
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}
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if (y_span->waste > 0)
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{
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const guchar *src = tex->bitmap.data
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+ ((y_span->start + y_span->size - y_span->waste - 1)
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* tex->bitmap.rowstride)
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+ x_span->start * bpp;
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guchar *dst = waste_buf;
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guint wy, wx;
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for (wy = 0; wy < y_span->waste; wy++)
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{
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memcpy (dst, src, (x_span->size - x_span->waste) * bpp);
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dst += (x_span->size - x_span->waste) * bpp;
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for (wx = 0; wx < x_span->waste; wx++)
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{
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memcpy (dst, dst - bpp, bpp);
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dst += bpp;
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}
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}
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GE( glTexSubImage2D (tex->gl_target, 0,
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0, y_span->size - y_span->waste,
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x_span->size,
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y_span->waste,
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tex->gl_format, tex->gl_type,
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waste_buf) );
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}
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if (tex->auto_mipmap)
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cogl_wrap_glGenerateMipmap (tex->gl_target);
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@ -240,7 +328,10 @@ _cogl_texture_upload_to_gl (CoglTexture *tex)
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g_free (slice_bmp.data);
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}
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}
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if (waste_buf)
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g_free (waste_buf);
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return TRUE;
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}
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@ -494,17 +585,22 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
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GLuint source_gl_format,
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GLuint source_gl_type)
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{
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gint bpp;
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CoglSpanIter x_iter;
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CoglSpanIter y_iter;
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GLuint gl_handle;
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gint source_x = 0, source_y = 0;
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gint inter_w = 0, inter_h = 0;
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gint local_x = 0, local_y = 0;
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CoglBitmap slice_bmp;
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CoglTexSliceSpan *x_span;
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CoglTexSliceSpan *y_span;
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gint bpp;
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CoglSpanIter x_iter;
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CoglSpanIter y_iter;
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GLuint gl_handle;
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||||
gint source_x = 0, source_y = 0;
|
||||
gint inter_w = 0, inter_h = 0;
|
||||
gint local_x = 0, local_y = 0;
|
||||
guchar *waste_buf;
|
||||
CoglBitmap slice_bmp;
|
||||
|
||||
bpp = _cogl_get_format_bpp (source_bmp->format);
|
||||
|
||||
|
||||
waste_buf = _cogl_texture_allocate_waste_buffer (tex);
|
||||
|
||||
/* FIXME: might optimize by not copying to intermediate slice
|
||||
bitmap when source rowstride = bpp * width and the texture
|
||||
image is not sliced */
|
||||
@ -526,7 +622,10 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
|
||||
inter_h = 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
|
||||
y_span = &g_array_index (tex->slice_y_spans, CoglTexSliceSpan,
|
||||
y_iter.index);
|
||||
|
||||
/* Iterate horizontal spans */
|
||||
for (source_x = src_x,
|
||||
_cogl_span_iter_begin (&x_iter, tex->slice_x_spans,
|
||||
@ -544,7 +643,10 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
|
||||
inter_w = 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
|
||||
x_span = &g_array_index (tex->slice_x_spans, CoglTexSliceSpan,
|
||||
x_iter.index);
|
||||
|
||||
/* Pick intersection width and height */
|
||||
inter_w = CLUTTER_FIXED_TO_INT (x_iter.intersect_end -
|
||||
x_iter.intersect_start);
|
||||
@ -591,7 +693,81 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
|
||||
source_gl_format,
|
||||
source_gl_type,
|
||||
slice_bmp.data) );
|
||||
|
||||
|
||||
/* If the x_span is sliced and the upload touches the
|
||||
rightmost pixels then fill the waste with copies of the
|
||||
pixels */
|
||||
if (x_span->waste > 0
|
||||
&& local_x < x_span->size - x_span->waste
|
||||
&& local_x + inter_w >= x_span->size - x_span->waste)
|
||||
{
|
||||
const guchar *src = source_bmp->data
|
||||
+ (src_y + CLUTTER_FIXED_TO_INT (y_iter.intersect_start)
|
||||
- dst_y) * source_bmp->rowstride
|
||||
+ (src_x + x_span->start + x_span->size - x_span->waste
|
||||
- dst_x - 1) * bpp;
|
||||
guchar *dst = waste_buf;
|
||||
guint wx, wy;
|
||||
|
||||
for (wy = 0; wy < inter_h; wy++)
|
||||
{
|
||||
for (wx = 0; wx < x_span->waste; wx++)
|
||||
{
|
||||
memcpy (dst, src, bpp);
|
||||
dst += bpp;
|
||||
}
|
||||
src += source_bmp->rowstride;
|
||||
}
|
||||
|
||||
GE( glTexSubImage2D (tex->gl_target, 0,
|
||||
x_span->size - x_span->waste, local_y,
|
||||
x_span->waste,
|
||||
inter_h,
|
||||
source_gl_format,
|
||||
source_gl_type,
|
||||
waste_buf) );
|
||||
}
|
||||
|
||||
/* same for the bottom-most pixels */
|
||||
if (y_span->waste > 0
|
||||
&& local_y < y_span->size - y_span->waste
|
||||
&& local_y + inter_h >= y_span->size - y_span->waste)
|
||||
{
|
||||
const guchar *src = source_bmp->data
|
||||
+ (src_x + CLUTTER_FIXED_TO_INT (x_iter.intersect_start)
|
||||
- dst_x) * bpp
|
||||
+ (src_y + y_span->start + y_span->size - y_span->waste
|
||||
- dst_y - 1) * source_bmp->rowstride;
|
||||
guchar *dst = waste_buf;
|
||||
guint wy, wx;
|
||||
guint copy_width;
|
||||
|
||||
if (local_x + inter_w >= x_span->size - x_span->waste)
|
||||
copy_width = x_span->size - local_x;
|
||||
else
|
||||
copy_width = inter_w;
|
||||
|
||||
for (wy = 0; wy < y_span->waste; wy++)
|
||||
{
|
||||
memcpy (dst, src, inter_w * bpp);
|
||||
dst += inter_w * bpp;
|
||||
|
||||
for (wx = inter_w; wx < copy_width; wx++)
|
||||
{
|
||||
memcpy (dst, dst - bpp, bpp);
|
||||
dst += bpp;
|
||||
}
|
||||
}
|
||||
|
||||
GE( glTexSubImage2D (tex->gl_target, 0,
|
||||
local_x, y_span->size - y_span->waste,
|
||||
copy_width,
|
||||
y_span->waste,
|
||||
source_gl_format,
|
||||
source_gl_type,
|
||||
waste_buf) );
|
||||
}
|
||||
|
||||
if (tex->auto_mipmap)
|
||||
cogl_wrap_glGenerateMipmap (tex->gl_target);
|
||||
|
||||
@ -599,7 +775,10 @@ _cogl_texture_upload_subregion_to_gl (CoglTexture *tex,
|
||||
g_free (slice_bmp.data);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
if (waste_buf)
|
||||
g_free (waste_buf);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user