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
36 struct bitmap_cache;
37 struct blit_state;
38 struct dd_function_table;
39 struct draw_context;
40 struct draw_stage;
41 struct gen_mipmap_state;
42 struct st_context;
43 struct st_fragment_program;
44 struct 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
56 struct st_state_flags {
57 GLuint mesa;
58 GLuint st;
59 };
60
61 struct st_tracked_state {
62 const char *name;
63 struct st_state_flags dirty;
64 void (*update)( struct st_context *st );
65 };
66
67
68
69 struct 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 samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
102 GLuint num_samplers[PIPE_SHADER_TYPES];
103 struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
104 GLuint num_sampler_views[PIPE_SHADER_TYPES];
105 struct pipe_clip_state clip;
106 struct {
107 void *ptr;
108 unsigned size;
109 } constants[PIPE_SHADER_TYPES];
110 struct pipe_framebuffer_state framebuffer;
111 struct pipe_scissor_state scissor;
112 struct pipe_viewport_state viewport;
113 unsigned sample_mask;
114
115 GLuint poly_stipple[32]; /**< In OpenGL's bottom-to-top order */
116
117 GLuint fb_orientation;
118 } state;
119
120 char vendor[100];
121 char renderer[100];
122
123 struct st_state_flags dirty;
124
125 GLboolean missing_textures;
126 GLboolean vertdata_edgeflags;
127
128 /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
129 const GLuint *vertex_result_to_slot;
130
131 struct st_vertex_program *vp; /**< Currently bound vertex program */
132 struct st_fragment_program *fp; /**< Currently bound fragment program */
133 struct st_geometry_program *gp; /**< Currently bound geometry program */
134
135 struct st_vp_variant *vp_variant;
136 struct st_fp_variant *fp_variant;
137 struct st_gp_variant *gp_variant;
138
139 struct gl_texture_object *default_texture;
140
141 struct {
142 struct gl_program_cache *cache;
143 struct st_fragment_program *program; /**< cur pixel transfer prog */
144 GLuint xfer_prog_sn; /**< pixel xfer program serial no. */
145 GLuint user_prog_sn; /**< user fragment program serial no. */
146 struct st_fragment_program *combined_prog;
147 GLuint combined_prog_sn;
148 struct pipe_resource *pixelmap_texture;
149 struct pipe_sampler_view *pixelmap_sampler_view;
150 boolean pixelmap_enabled; /**< use the pixelmap texture? */
151 } pixel_xfer;
152
153 /** for glBitmap */
154 struct {
155 struct pipe_rasterizer_state rasterizer;
156 struct pipe_sampler_state samplers[2];
157 enum pipe_format tex_format;
158 void *vs;
159 struct bitmap_cache *cache;
160 } bitmap;
161
162 /** for glDraw/CopyPixels */
163 struct {
164 struct gl_fragment_program *shaders[4];
165 void *vert_shaders[2]; /**< ureg shaders */
166 } drawpix;
167
168 /** for glClear */
169 struct {
170 struct pipe_rasterizer_state raster;
171 struct pipe_viewport_state viewport;
172 void *vs;
173 void *fs;
174 boolean enable_ds_separate;
175 } clear;
176
177 /** used for anything using util_draw_vertex_buffer */
178 struct pipe_vertex_element velems_util_draw[3];
179
180 void *passthrough_fs; /**< simple pass-through frag shader */
181
182 enum pipe_texture_target internal_target;
183 struct gen_mipmap_state *gen_mipmap;
184 struct blit_state *blit;
185
186 struct cso_context *cso_context;
187
188 int force_msaa;
189 void *winsys_drawable_handle;
190
191 /* Active render condition. */
192 struct pipe_query *render_condition;
193 unsigned condition_mode;
194
195 int32_t draw_stamp;
196 int32_t read_stamp;
197
198 struct st_config_options options;
199 };
200
201
202 /* Need this so that we can implement Mesa callbacks in this module.
203 */
st_context(struct gl_context * ctx)204 static INLINE struct st_context *st_context(struct gl_context *ctx)
205 {
206 return ctx->st;
207 }
208
209
210 /**
211 * Wrapper for struct gl_framebuffer.
212 * This is an opaque type to the outside world.
213 */
214 struct st_framebuffer
215 {
216 struct gl_framebuffer Base;
217 void *Private;
218
219 struct st_framebuffer_iface *iface;
220 enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
221 unsigned num_statts;
222 int32_t stamp;
223 int32_t iface_stamp;
224 };
225
226
227 extern void st_init_driver_functions(struct dd_function_table *functions);
228
229 void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
230
231
232
233 #define Y_0_TOP 1
234 #define Y_0_BOTTOM 2
235
236 static INLINE GLuint
st_fb_orientation(const struct gl_framebuffer * fb)237 st_fb_orientation(const struct gl_framebuffer *fb)
238 {
239 if (fb && _mesa_is_winsys_fbo(fb)) {
240 /* Drawing into a window (on-screen buffer).
241 *
242 * Negate Y scale to flip image vertically.
243 * The NDC Y coords prior to viewport transformation are in the range
244 * [y=-1=bottom, y=1=top]
245 * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
246 * H is the window height.
247 * Use the viewport transformation to invert Y.
248 */
249 return Y_0_TOP;
250 }
251 else {
252 /* Drawing into user-created FBO (very likely a texture).
253 *
254 * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
255 */
256 return Y_0_BOTTOM;
257 }
258 }
259
260
261 /** clear-alloc a struct-sized object, with casting */
262 #define ST_CALLOC_STRUCT(T) (struct T *) calloc(1, sizeof(struct T))
263
264
265 extern int
266 st_get_msaa(void);
267
268 extern struct st_context *
269 st_create_context(gl_api api, struct pipe_context *pipe,
270 const struct gl_config *visual,
271 struct st_context *share,
272 const struct st_config_options *options);
273
274 extern void
275 st_destroy_context(struct st_context *st);
276
277
278 #endif
279