st_context.h revision 5749ae919e386e49dbf373e362dd74b513c96360 
1/**************************************************************************
2 *
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 blit_state;
38struct dd_function_table;
39struct draw_context;
40struct draw_stage;
41struct gen_mipmap_state;
42struct st_context;
43struct st_fragment_program;
44struct u_upload_mgr;
45
46
47#define ST_NEW_MESA                    (1 << 0) /* Mesa state has changed */
48#define ST_NEW_FRAGMENT_PROGRAM        (1 << 1)
49#define ST_NEW_VERTEX_PROGRAM          (1 << 2)
50#define ST_NEW_FRAMEBUFFER             (1 << 3)
51#define ST_NEW_EDGEFLAGS_DATA          (1 << 4)
52#define ST_NEW_GEOMETRY_PROGRAM        (1 << 5)
53#define ST_NEW_VERTEX_ARRAYS           (1 << 6)
54
55
56struct st_state_flags {
57   GLuint mesa;
58   GLuint st;
59};
60
61struct st_tracked_state {
62   const char *name;
63   struct st_state_flags dirty;
64   void (*update)( struct st_context *st );
65};
66
67
68
69struct st_context
70{
71   struct st_context_iface iface;
72
73   struct gl_context *ctx;
74
75   struct pipe_context *pipe;
76
77   struct u_upload_mgr *uploader, *indexbuf_uploader, *constbuf_uploader;
78
79   struct draw_context *draw;  /**< For selection/feedback/rastpos only */
80   struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
81   struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
82   struct draw_stage *rastpos_stage;  /**< For glRasterPos */
83   GLboolean clamp_frag_color_in_shader;
84   GLboolean clamp_vert_color_in_shader;
85   boolean has_stencil_export; /**< can do shader stencil export? */
86
87   /* On old libGL's for linux we need to invalidate the drawables
88    * on glViewpport calls, this is set via a option.
89    */
90   boolean invalidate_on_gl_viewport;
91
92   boolean vertex_array_out_of_memory;
93
94   /* Some state is contained in constant objects.
95    * Other state is just parameter values.
96    */
97   struct {
98      struct pipe_blend_state               blend;
99      struct pipe_depth_stencil_alpha_state depth_stencil;
100      struct pipe_rasterizer_state          rasterizer;
101      struct pipe_sampler_state    fragment_samplers[PIPE_MAX_SAMPLERS];
102      struct pipe_sampler_state    vertex_samplers[PIPE_MAX_VERTEX_SAMPLERS];
103      struct pipe_clip_state clip;
104      struct {
105         void *ptr;
106         unsigned size;
107      } constants[PIPE_SHADER_TYPES];
108      struct pipe_framebuffer_state framebuffer;
109      struct pipe_sampler_view *fragment_sampler_views[PIPE_MAX_SAMPLERS];
110      struct pipe_sampler_view *vertex_sampler_views[PIPE_MAX_VERTEX_SAMPLERS];
111      struct pipe_scissor_state scissor;
112      struct pipe_viewport_state viewport;
113      unsigned sample_mask;
114
115      GLuint num_fragment_samplers;
116      GLuint num_vertex_samplers;
117      GLuint num_fragment_textures;
118      GLuint num_vertex_textures;
119
120      GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
121
122      GLuint fb_orientation;
123   } state;
124
125   char vendor[100];
126   char renderer[100];
127
128   struct st_state_flags dirty;
129
130   GLboolean missing_textures;
131   GLboolean vertdata_edgeflags;
132
133   /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
134   const GLuint *vertex_result_to_slot;
135
136   struct st_vertex_program *vp;    /**< Currently bound vertex program */
137   struct st_fragment_program *fp;  /**< Currently bound fragment program */
138   struct st_geometry_program *gp;  /**< Currently bound geometry program */
139
140   struct st_vp_variant *vp_variant;
141   struct st_fp_variant *fp_variant;
142   struct st_gp_variant *gp_variant;
143
144   struct gl_texture_object *default_texture;
145
146   struct {
147      struct gl_program_cache *cache;
148      struct st_fragment_program *program;  /**< cur pixel transfer prog */
149      GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
150      GLuint user_prog_sn;  /**< user fragment program serial no. */
151      struct st_fragment_program *combined_prog;
152      GLuint combined_prog_sn;
153      struct pipe_resource *pixelmap_texture;
154      struct pipe_sampler_view *pixelmap_sampler_view;
155      boolean pixelmap_enabled;  /**< use the pixelmap texture? */
156   } pixel_xfer;
157
158   /** for glBitmap */
159   struct {
160      struct pipe_rasterizer_state rasterizer;
161      struct pipe_sampler_state samplers[2];
162      enum pipe_format tex_format;
163      void *vs;
164      struct bitmap_cache *cache;
165   } bitmap;
166
167   /** for glDraw/CopyPixels */
168   struct {
169      struct gl_fragment_program *shaders[4];
170      void *vert_shaders[2];   /**< ureg shaders */
171   } drawpix;
172
173   /** for glClear */
174   struct {
175      struct pipe_rasterizer_state raster;
176      struct pipe_viewport_state viewport;
177      void *vs;
178      void *fs;
179      boolean enable_ds_separate;
180   } clear;
181
182   /** used for anything using util_draw_vertex_buffer */
183   struct pipe_vertex_element velems_util_draw[3];
184
185   void *passthrough_fs;  /**< simple pass-through frag shader */
186
187   enum pipe_texture_target internal_target;
188   struct gen_mipmap_state *gen_mipmap;
189   struct blit_state *blit;
190
191   struct cso_context *cso_context;
192
193   int force_msaa;
194   void *winsys_drawable_handle;
195
196   /* Active render condition. */
197   struct pipe_query *render_condition;
198   unsigned condition_mode;
199
200   int32_t draw_stamp;
201   int32_t read_stamp;
202};
203
204
205/* Need this so that we can implement Mesa callbacks in this module.
206 */
207static INLINE struct st_context *st_context(struct gl_context *ctx)
208{
209   return ctx->st;
210}
211
212
213/**
214 * Wrapper for struct gl_framebuffer.
215 * This is an opaque type to the outside world.
216 */
217struct st_framebuffer
218{
219   struct gl_framebuffer Base;
220   void *Private;
221
222   struct st_framebuffer_iface *iface;
223   enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
224   unsigned num_statts;
225   int32_t stamp;
226   int32_t iface_stamp;
227};
228
229
230extern void st_init_driver_functions(struct dd_function_table *functions);
231
232void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
233
234
235
236#define Y_0_TOP 1
237#define Y_0_BOTTOM 2
238
239static INLINE GLuint
240st_fb_orientation(const struct gl_framebuffer *fb)
241{
242   if (fb && _mesa_is_winsys_fbo(fb)) {
243      /* Drawing into a window (on-screen buffer).
244       *
245       * Negate Y scale to flip image vertically.
246       * The NDC Y coords prior to viewport transformation are in the range
247       * [y=-1=bottom, y=1=top]
248       * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
249       * H is the window height.
250       * Use the viewport transformation to invert Y.
251       */
252      return Y_0_TOP;
253   }
254   else {
255      /* Drawing into user-created FBO (very likely a texture).
256       *
257       * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
258       */
259      return Y_0_BOTTOM;
260   }
261}
262
263
264/** clear-alloc a struct-sized object, with casting */
265#define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
266
267
268extern int
269st_get_msaa(void);
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
276extern void
277st_destroy_context(struct st_context *st);
278
279
280#endif
281