st_context.h revision 848b8605 
1/**************************************************************************
2 *
3 * Copyright 2003 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#ifndef ST_CONTEXT_H
29#define ST_CONTEXT_H
30
31#include "main/mtypes.h"
32#include "pipe/p_state.h"
33#include "state_tracker/st_api.h"
34#include "main/fbobject.h"
35
36struct bitmap_cache;
37struct dd_function_table;
38struct draw_context;
39struct draw_stage;
40struct gen_mipmap_state;
41struct st_context;
42struct st_fragment_program;
43struct u_upload_mgr;
44
45
46#define ST_NEW_MESA                    (1 << 0) /* Mesa state has changed */
47#define ST_NEW_FRAGMENT_PROGRAM        (1 << 1)
48#define ST_NEW_VERTEX_PROGRAM          (1 << 2)
49#define ST_NEW_FRAMEBUFFER             (1 << 3)
50/* gap, re-use it */
51#define ST_NEW_GEOMETRY_PROGRAM        (1 << 5)
52#define ST_NEW_VERTEX_ARRAYS           (1 << 6)
53#define ST_NEW_RASTERIZER              (1 << 7)
54#define ST_NEW_UNIFORM_BUFFER          (1 << 8)
55
56
57struct st_state_flags {
58   GLuint mesa;
59   GLuint st;
60};
61
62struct st_tracked_state {
63   const char *name;
64   struct st_state_flags dirty;
65   void (*update)( struct st_context *st );
66};
67
68
69
70struct st_context
71{
72   struct st_context_iface iface;
73
74   struct gl_context *ctx;
75
76   struct pipe_context *pipe;
77
78   struct u_upload_mgr *uploader, *indexbuf_uploader, *constbuf_uploader;
79
80   struct draw_context *draw;  /**< For selection/feedback/rastpos only */
81   struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
82   struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
83   struct draw_stage *rastpos_stage;  /**< For glRasterPos */
84   GLboolean clamp_frag_color_in_shader;
85   GLboolean clamp_vert_color_in_shader;
86   boolean has_stencil_export; /**< can do shader stencil export? */
87   boolean has_time_elapsed;
88   boolean has_shader_model3;
89   boolean has_etc1;
90   boolean prefer_blit_based_texture_transfer;
91
92   boolean needs_texcoord_semantic;
93   boolean apply_texture_swizzle_to_border_color;
94
95   /* On old libGL's for linux we need to invalidate the drawables
96    * on glViewpport calls, this is set via a option.
97    */
98   boolean invalidate_on_gl_viewport;
99
100   boolean vertex_array_out_of_memory;
101
102   /* Some state is contained in constant objects.
103    * Other state is just parameter values.
104    */
105   struct {
106      struct pipe_blend_state               blend;
107      struct pipe_depth_stencil_alpha_state depth_stencil;
108      struct pipe_rasterizer_state          rasterizer;
109      struct pipe_sampler_state samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
110      GLuint num_samplers[PIPE_SHADER_TYPES];
111      struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
112      GLuint num_sampler_views[PIPE_SHADER_TYPES];
113      struct pipe_clip_state clip;
114      struct {
115         void *ptr;
116         unsigned size;
117      } constants[PIPE_SHADER_TYPES];
118      struct pipe_framebuffer_state framebuffer;
119      struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
120      struct pipe_viewport_state viewport[PIPE_MAX_VIEWPORTS];
121      unsigned sample_mask;
122
123      GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
124
125      GLuint fb_orientation;
126   } state;
127
128   char vendor[100];
129   char renderer[100];
130
131   struct st_state_flags dirty;
132
133   GLboolean missing_textures;
134   GLboolean vertdata_edgeflags;
135   GLboolean edgeflag_culls_prims;
136
137   /** Mapping from VARYING_SLOT_x to post-transformed vertex slot */
138   const GLuint *vertex_result_to_slot;
139
140   struct st_vertex_program *vp;    /**< Currently bound vertex program */
141   struct st_fragment_program *fp;  /**< Currently bound fragment program */
142   struct st_geometry_program *gp;  /**< Currently bound geometry program */
143
144   struct st_vp_variant *vp_variant;
145   struct st_fp_variant *fp_variant;
146   struct st_gp_variant *gp_variant;
147
148   struct gl_texture_object *default_texture;
149
150   struct {
151      struct gl_program_cache *cache;
152      struct st_fragment_program *program;  /**< cur pixel transfer prog */
153      GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
154      GLuint user_prog_sn;  /**< user fragment program serial no. */
155      struct st_fragment_program *combined_prog;
156      GLuint combined_prog_sn;
157      struct pipe_resource *pixelmap_texture;
158      struct pipe_sampler_view *pixelmap_sampler_view;
159      boolean pixelmap_enabled;  /**< use the pixelmap texture? */
160   } pixel_xfer;
161
162   /** for glBitmap */
163   struct {
164      struct pipe_rasterizer_state rasterizer;
165      struct pipe_sampler_state samplers[2];
166      enum pipe_format tex_format;
167      void *vs;
168      struct bitmap_cache *cache;
169   } bitmap;
170
171   /** for glDraw/CopyPixels */
172   struct {
173      struct gl_fragment_program *shaders[4];
174      void *vert_shaders[2];   /**< ureg shaders */
175   } drawpix;
176
177   /** for glClear */
178   struct {
179      struct pipe_rasterizer_state raster;
180      struct pipe_viewport_state viewport;
181      void *vs;
182      void *fs;
183      void *vs_layered;
184      void *gs_layered;
185   } clear;
186
187   /** used for anything using util_draw_vertex_buffer */
188   struct pipe_vertex_element velems_util_draw[3];
189
190   void *passthrough_fs;  /**< simple pass-through frag shader */
191
192   enum pipe_texture_target internal_target;
193
194   struct cso_context *cso_context;
195
196   void *winsys_drawable_handle;
197
198   /* The number of vertex buffers from the last call of validate_arrays. */
199   unsigned last_num_vbuffers;
200
201   int32_t draw_stamp;
202   int32_t read_stamp;
203
204   struct st_config_options options;
205};
206
207
208/* Need this so that we can implement Mesa callbacks in this module.
209 */
210static INLINE struct st_context *st_context(struct gl_context *ctx)
211{
212   return ctx->st;
213}
214
215
216/**
217 * Wrapper for struct gl_framebuffer.
218 * This is an opaque type to the outside world.
219 */
220struct st_framebuffer
221{
222   struct gl_framebuffer Base;
223   void *Private;
224
225   struct st_framebuffer_iface *iface;
226   enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
227   unsigned num_statts;
228   int32_t stamp;
229   int32_t iface_stamp;
230};
231
232
233extern void st_init_driver_functions(struct dd_function_table *functions);
234
235void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
236
237
238
239#define Y_0_TOP 1
240#define Y_0_BOTTOM 2
241
242static INLINE GLuint
243st_fb_orientation(const struct gl_framebuffer *fb)
244{
245   if (fb && _mesa_is_winsys_fbo(fb)) {
246      /* Drawing into a window (on-screen buffer).
247       *
248       * Negate Y scale to flip image vertically.
249       * The NDC Y coords prior to viewport transformation are in the range
250       * [y=-1=bottom, y=1=top]
251       * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
252       * H is the window height.
253       * Use the viewport transformation to invert Y.
254       */
255      return Y_0_TOP;
256   }
257   else {
258      /* Drawing into user-created FBO (very likely a texture).
259       *
260       * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
261       */
262      return Y_0_BOTTOM;
263   }
264}
265
266
267/** clear-alloc a struct-sized object, with casting */
268#define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
269
270
271extern struct st_context *
272st_create_context(gl_api api, struct pipe_context *pipe,
273                  const struct gl_config *visual,
274                  struct st_context *share,
275                  const struct st_config_options *options);
276
277extern void
278st_destroy_context(struct st_context *st);
279
280
281#endif
282