1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.  All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 **************************************************************************/
26
27#ifndef VG_CONTEXT_H
28#define VG_CONTEXT_H
29
30#include "vg_state.h"
31
32#include "pipe/p_format.h"
33#include "pipe/p_state.h"
34#include "util/u_pointer.h"
35#include "util/u_math.h"
36#include "state_tracker/st_api.h"
37
38#include "cso_cache/cso_hash.h"
39#include "cso_cache/cso_context.h"
40
41struct renderer;
42struct shaders_cache;
43struct shader;
44struct vg_shader;
45struct mapi_table;
46
47struct st_renderbuffer {
48   enum pipe_format   format;
49   struct pipe_surface *surface;
50   struct pipe_resource *texture;
51   VGint width, height;
52};
53
54struct st_framebuffer {
55   VGint width, height;
56   struct st_renderbuffer *strb;
57   struct st_renderbuffer *dsrb;
58
59   struct pipe_sampler_view *surface_mask_view;
60
61   struct pipe_sampler_view *blend_texture_view;
62
63
64   struct st_framebuffer_iface *iface;
65   enum st_attachment_type strb_att;
66
67   void *privateData;
68   int32_t stamp;
69   int32_t iface_stamp;
70};
71
72enum vg_object_type {
73   VG_OBJECT_UNKNOWN = 0,
74   VG_OBJECT_PAINT,
75   VG_OBJECT_IMAGE,
76   VG_OBJECT_MASK,
77   VG_OBJECT_FONT,
78   VG_OBJECT_PATH,
79
80   VG_OBJECT_LAST
81};
82enum dirty_state {
83   BLEND_DIRTY         = 1 << 0,
84   FRAMEBUFFER_DIRTY   = 1 << 1,
85   DEPTH_STENCIL_DIRTY = 1 << 2,
86   PAINT_DIRTY         = 1 << 3,
87
88   ALL_DIRTY           = BLEND_DIRTY |
89                         FRAMEBUFFER_DIRTY |
90                         DEPTH_STENCIL_DIRTY |
91                         PAINT_DIRTY
92};
93
94struct vg_context
95{
96   struct st_context_iface iface;
97   struct mapi_table *dispatch;
98
99   struct pipe_context *pipe;
100   enum pipe_format ds_format;
101
102   struct {
103      struct vg_state vg;
104      VGbitfield dirty;
105   } state;
106
107   VGErrorCode _error;
108
109   struct st_framebuffer *draw_buffer;
110
111   struct cso_hash *owned_objects[VG_OBJECT_LAST];
112
113   struct {
114      struct pipe_resource *cbuf;
115      struct pipe_sampler_state sampler;
116
117      struct vg_shader *union_fs;
118      struct vg_shader *intersect_fs;
119      struct vg_shader *subtract_fs;
120      struct vg_shader *set_fs;
121   } mask;
122
123   struct cso_context *cso_context;
124
125   struct renderer *renderer;
126   struct shaders_cache *sc;
127   struct shader *shader;
128
129   struct pipe_sampler_state blend_sampler;
130   struct vg_paint *default_paint;
131
132   struct blit_state *blit;
133
134   int32_t draw_stamp;
135};
136
137
138/**
139 *  Base class for VG objects like paths, images, fonts.
140 */
141struct vg_object {
142   enum vg_object_type type;
143   VGHandle handle;
144   struct vg_context *ctx;
145};
146
147
148void vg_init_object(struct vg_object *obj, struct vg_context *ctx, enum vg_object_type type);
149void vg_free_object(struct vg_object *obj);
150
151VGboolean vg_object_is_valid(VGHandle object, enum vg_object_type type);
152
153struct vg_context *vg_create_context(struct pipe_context *pipe,
154                                     const void *visual,
155                                     struct vg_context *share);
156void vg_destroy_context(struct vg_context *ctx);
157struct vg_context *vg_current_context(void);
158void vg_set_current_context(struct vg_context *ctx);
159
160VGboolean vg_context_is_object_valid(struct vg_context *ctx,
161                                     enum vg_object_type type,
162                                     VGHandle object);
163void vg_context_add_object(struct vg_context *ctx,
164                           struct vg_object *obj);
165void vg_context_remove_object(struct vg_context *ctx,
166                              struct vg_object *obj);
167
168void vg_validate_state(struct vg_context *ctx);
169
170void vg_set_error(struct vg_context *ctx,
171                  VGErrorCode code);
172
173struct pipe_sampler_view *vg_prepare_blend_surface(struct vg_context *ctx);
174struct pipe_sampler_view *vg_prepare_blend_surface_from_mask(struct vg_context *ctx);
175
176struct pipe_sampler_view *vg_get_surface_mask(struct vg_context *ctx);
177
178VGboolean vg_get_paint_matrix(struct vg_context *ctx,
179                              const struct matrix *paint_to_user,
180                              const struct matrix *user_to_surface,
181                              struct matrix *mat);
182
183static INLINE VGboolean is_aligned_to(const void *ptr, VGbyte alignment)
184{
185   void *aligned = align_pointer(ptr, alignment);
186   return (ptr == aligned) ? VG_TRUE : VG_FALSE;
187}
188
189static INLINE VGboolean is_aligned(const void *ptr)
190{
191   return is_aligned_to(ptr, 4);
192}
193
194static INLINE void vg_shift_rectx(VGfloat coords[4],
195                                 const VGfloat *bounds,
196                                 const VGfloat shift)
197{
198   coords[0] += shift;
199   coords[2] -= shift;
200   if (bounds) {
201      coords[2] = MIN2(coords[2], bounds[2]);
202      /* bound x/y + width/height */
203      if ((coords[0] + coords[2]) > (bounds[0] + bounds[2])) {
204         coords[2] = (bounds[0] + bounds[2]) - coords[0];
205      }
206   }
207}
208
209static INLINE void vg_shift_recty(VGfloat coords[4],
210                                 const VGfloat *bounds,
211                                 const VGfloat shift)
212{
213   coords[1] += shift;
214   coords[3] -= shift;
215   if (bounds) {
216      coords[3] = MIN2(coords[3], bounds[3]);
217      if ((coords[1] + coords[3]) > (bounds[1] + bounds[3])) {
218         coords[3] = (bounds[1] + bounds[3]) - coords[1];
219      }
220   }
221}
222
223static INLINE void vg_bound_rect(VGfloat coords[4],
224                                 const VGfloat bounds[4],
225                                 VGfloat shift[4])
226{
227   /* if outside the bounds */
228   if (coords[0] > (bounds[0] + bounds[2]) ||
229       coords[1] > (bounds[1] + bounds[3]) ||
230       (coords[0] + coords[2]) < bounds[0] ||
231       (coords[1] + coords[3]) < bounds[1]) {
232      coords[0] = 0.f;
233      coords[1] = 0.f;
234      coords[2] = 0.f;
235      coords[3] = 0.f;
236      shift[0] = 0.f;
237      shift[1] = 0.f;
238      return;
239   }
240
241   /* bound x */
242   if (coords[0] < bounds[0]) {
243      shift[0] = bounds[0] - coords[0];
244      coords[2] -= shift[0];
245      coords[0] = bounds[0];
246   } else
247      shift[0] = 0.f;
248
249   /* bound y */
250   if (coords[1] < bounds[1]) {
251      shift[1] = bounds[1] - coords[1];
252      coords[3] -= shift[1];
253      coords[1] = bounds[1];
254   } else
255      shift[1] = 0.f;
256
257   shift[2] = bounds[2] - coords[2];
258   shift[3] = bounds[3] - coords[3];
259   /* bound width/height */
260   coords[2] = MIN2(coords[2], bounds[2]);
261   coords[3] = MIN2(coords[3], bounds[3]);
262
263   /* bound x/y + width/height */
264   if ((coords[0] + coords[2]) > (bounds[0] + bounds[2])) {
265      coords[2] = (bounds[0] + bounds[2]) - coords[0];
266   }
267   if ((coords[1] + coords[3]) > (bounds[1] + bounds[3])) {
268      coords[3] = (bounds[1] + bounds[3]) - coords[1];
269   }
270
271   /* if outside the bounds */
272   if ((coords[0] + coords[2]) < bounds[0] ||
273       (coords[1] + coords[3]) < bounds[1]) {
274      coords[0] = 0.f;
275      coords[1] = 0.f;
276      coords[2] = 0.f;
277      coords[3] = 0.f;
278      return;
279   }
280}
281
282#endif
283