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glamor: Fix render source transforms.

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Fixes (except for small bit differences) cairo source-pattern.
This commit is contained in:
Eric Anholt 2010-02-11 17:32:27 -08:00 committed by Zhigang Gong
parent b1f67a5082
commit 2ba634fab9
1 changed files with 52 additions and 20 deletions
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72
glamor/glamor_render.c
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@ -508,6 +508,36 @@ good_dest_format(PicturePtr picture)
}
}
static inline float
xFixedToFloat(pixman_fixed_t val)
{
return ((float)xFixedToInt(val) + ((float)xFixedFrac(val) / 65536.0));
}
static void
glamor_set_transformed_point(PicturePtr picture, PixmapPtr pixmap,
float *texcoord, int x, int y)
{
float result[3];
int i;
float tx, ty;
if (picture->transform) {
for (i = 0; i < 3; i++) {
result[i] = (xFixedToFloat(picture->transform->matrix[i][0]) * x +
xFixedToFloat(picture->transform->matrix[i][1]) * y +
xFixedToFloat(picture->transform->matrix[i][2]));
}
tx = result[0] / result[2];
ty = result[1] / result[2];
} else {
tx = x;
ty = y;
}
texcoord[0] = t_from_x_coord_x(pixmap, tx);
texcoord[1] = t_from_x_coord_y(pixmap, ty);
}
static Bool
glamor_composite_with_shader(CARD8 op,
PicturePtr source,
@ -707,29 +737,31 @@ glamor_composite_with_shader(CARD8 op,
int ty1 = box[i].y1 + y_source - y_dest;
int tx2 = box[i].x2 + x_source - x_dest;
int ty2 = box[i].y2 + y_source - y_dest;
source_texcoords[0][0] = t_from_x_coord_x(source_pixmap, tx1);
source_texcoords[0][1] = t_from_x_coord_y(source_pixmap, ty1);
source_texcoords[1][0] = t_from_x_coord_x(source_pixmap, tx2);
source_texcoords[1][1] = t_from_x_coord_y(source_pixmap, ty1);
source_texcoords[2][0] = t_from_x_coord_x(source_pixmap, tx2);
source_texcoords[2][1] = t_from_x_coord_y(source_pixmap, ty2);
source_texcoords[3][0] = t_from_x_coord_x(source_pixmap, tx1);
source_texcoords[3][1] = t_from_x_coord_y(source_pixmap, ty2);
glamor_set_transformed_point(source, source_pixmap,
source_texcoords[0], tx1, ty1);
glamor_set_transformed_point(source, source_pixmap,
source_texcoords[1], tx2, ty1);
glamor_set_transformed_point(source, source_pixmap,
source_texcoords[2], tx2, ty2);
glamor_set_transformed_point(source, source_pixmap,
source_texcoords[3], tx1, ty2);
}
if (key.mask != SHADER_MASK_NONE && key.mask != SHADER_MASK_SOLID) {
int tx1 = box[i].x1 + x_mask - x_dest;
int ty1 = box[i].y1 + y_mask - y_dest;
int tx2 = box[i].x2 + x_mask - x_dest;
int ty2 = box[i].y2 + y_mask - y_dest;
mask_texcoords[0][0] = t_from_x_coord_x(mask_pixmap, tx1);
mask_texcoords[0][1] = t_from_x_coord_y(mask_pixmap, ty1);
mask_texcoords[1][0] = t_from_x_coord_x(mask_pixmap, tx2);
mask_texcoords[1][1] = t_from_x_coord_y(mask_pixmap, ty1);
mask_texcoords[2][0] = t_from_x_coord_x(mask_pixmap, tx2);
mask_texcoords[2][1] = t_from_x_coord_y(mask_pixmap, ty2);
mask_texcoords[3][0] = t_from_x_coord_x(mask_pixmap, tx1);
mask_texcoords[3][1] = t_from_x_coord_y(mask_pixmap, ty2);
float tx1 = box[i].x1 + x_mask - x_dest;
float ty1 = box[i].y1 + y_mask - y_dest;
float tx2 = box[i].x2 + x_mask - x_dest;
float ty2 = box[i].y2 + y_mask - y_dest;
glamor_set_transformed_point(mask, mask_pixmap,
mask_texcoords[0], tx1, ty1);
glamor_set_transformed_point(mask, mask_pixmap,
mask_texcoords[1], tx2, ty1);
glamor_set_transformed_point(mask, mask_pixmap,
mask_texcoords[2], tx2, ty2);
glamor_set_transformed_point(mask, mask_pixmap,
mask_texcoords[3], tx1, ty2);
}
#if 0
else memset(mask_texcoords, 0, sizeof(mask_texcoords));