Subversion Repositories Kolibri OS

/**************************************************************************

 *

 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.

 * All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sub license, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice (including the

 * next paragraph) shall be included in all copies or substantial portions

 * of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR

 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 **************************************************************************/

#ifndef ST_CONTEXT_H

#define ST_CONTEXT_H

#include "main/mtypes.h"

#include "pipe/p_state.h"

#include "state_tracker/st_api.h"

#include "main/fbobject.h"

struct bitmap_cache;

struct dd_function_table;

struct draw_context;

struct draw_stage;

struct gen_mipmap_state;

struct st_context;

struct st_fragment_program;

struct u_upload_mgr;

#define ST_NEW_MESA                    (1 << 0) /* Mesa state has changed */

#define ST_NEW_FRAGMENT_PROGRAM        (1 << 1)

#define ST_NEW_VERTEX_PROGRAM          (1 << 2)

#define ST_NEW_FRAMEBUFFER             (1 << 3)

#define ST_NEW_EDGEFLAGS_DATA          (1 << 4)

#define ST_NEW_GEOMETRY_PROGRAM        (1 << 5)

#define ST_NEW_VERTEX_ARRAYS           (1 << 6)

#define ST_NEW_RASTERIZER              (1 << 7)

#define ST_NEW_UNIFORM_BUFFER          (1 << 8)

struct st_state_flags {

   GLuint mesa;

   GLuint st;

};

struct st_tracked_state {

   const char *name;

   struct st_state_flags dirty;

   void (*update)( struct st_context *st );

};

struct st_context

{

   struct st_context_iface iface;

   struct gl_context *ctx;

   struct pipe_context *pipe;

   struct u_upload_mgr *uploader, *indexbuf_uploader, *constbuf_uploader;

   struct draw_context *draw;  /**< For selection/feedback/rastpos only */

   struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */

   struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */

   struct draw_stage *rastpos_stage;  /**< For glRasterPos */

   GLboolean clamp_frag_color_in_shader;

   GLboolean clamp_vert_color_in_shader;

   boolean has_stencil_export; /**< can do shader stencil export? */

   boolean has_time_elapsed;

   boolean has_shader_model3;

   boolean prefer_blit_based_texture_transfer;

   boolean needs_texcoord_semantic;

   boolean apply_texture_swizzle_to_border_color;

   /* On old libGL's for linux we need to invalidate the drawables

    * on glViewpport calls, this is set via a option.

    */

   boolean invalidate_on_gl_viewport;

   boolean vertex_array_out_of_memory;

   /* Some state is contained in constant objects.

    * Other state is just parameter values.

    */

   struct {

      struct pipe_blend_state               blend;

      struct pipe_depth_stencil_alpha_state depth_stencil;

      struct pipe_rasterizer_state          rasterizer;

      struct pipe_sampler_state samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];

      GLuint num_samplers[PIPE_SHADER_TYPES];

      struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];

      GLuint num_sampler_views[PIPE_SHADER_TYPES];

      struct pipe_clip_state clip;

      struct {

         void *ptr;

         unsigned size;

      } constants[PIPE_SHADER_TYPES];

      struct pipe_framebuffer_state framebuffer;

      struct pipe_scissor_state scissor;

      struct pipe_viewport_state viewport;

      unsigned sample_mask;

      GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */

      GLuint fb_orientation;

   } state;

   char vendor[100];

   char renderer[100];

   struct st_state_flags dirty;

   GLboolean missing_textures;

   GLboolean vertdata_edgeflags;

   /** Mapping from VARYING_SLOT_x to post-transformed vertex slot */

   const GLuint *vertex_result_to_slot;

   struct st_vertex_program *vp;    /**< Currently bound vertex program */

   struct st_fragment_program *fp;  /**< Currently bound fragment program */

   struct st_geometry_program *gp;  /**< Currently bound geometry program */

   struct st_vp_variant *vp_variant;

   struct st_fp_variant *fp_variant;

   struct st_gp_variant *gp_variant;

   struct gl_texture_object *default_texture;

   struct {

      struct gl_program_cache *cache;

      struct st_fragment_program *program;  /**< cur pixel transfer prog */

      GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */

      GLuint user_prog_sn;  /**< user fragment program serial no. */

      struct st_fragment_program *combined_prog;

      GLuint combined_prog_sn;

      struct pipe_resource *pixelmap_texture;

      struct pipe_sampler_view *pixelmap_sampler_view;

      boolean pixelmap_enabled;  /**< use the pixelmap texture? */

   } pixel_xfer;

   /** for glBitmap */

   struct {

      struct pipe_rasterizer_state rasterizer;

      struct pipe_sampler_state samplers[2];

      enum pipe_format tex_format;

      void *vs;

      struct bitmap_cache *cache;

   } bitmap;

   /** for glDraw/CopyPixels */

   struct {

      struct gl_fragment_program *shaders[4];

      void *vert_shaders[2];   /**< ureg shaders */

   } drawpix;

   /** for glClear */

   struct {

      struct pipe_rasterizer_state raster;

      struct pipe_viewport_state viewport;

      void *vs;

      void *fs;

   } clear;

   /** used for anything using util_draw_vertex_buffer */

   struct pipe_vertex_element velems_util_draw[3];

   void *passthrough_fs;  /**< simple pass-through frag shader */

   enum pipe_texture_target internal_target;

   struct gen_mipmap_state *gen_mipmap;

   struct cso_context *cso_context;

   void *winsys_drawable_handle;

   /* The number of vertex buffers from the last call of validate_arrays. */

   unsigned last_num_vbuffers;

   int32_t draw_stamp;

   int32_t read_stamp;

   struct st_config_options options;

};

/* Need this so that we can implement Mesa callbacks in this module.

 */

static INLINE struct st_context *st_context(struct gl_context *ctx)

{

   return ctx->st;

}

/**

 * Wrapper for struct gl_framebuffer.

 * This is an opaque type to the outside world.

 */

struct st_framebuffer

{

   struct gl_framebuffer Base;

   void *Private;

   struct st_framebuffer_iface *iface;

   enum st_attachment_type statts[ST_ATTACHMENT_COUNT];

   unsigned num_statts;

   int32_t stamp;

   int32_t iface_stamp;

};

extern void st_init_driver_functions(struct dd_function_table *functions);

void st_invalidate_state(struct gl_context * ctx, GLuint new_state);

#define Y_0_TOP 1

#define Y_0_BOTTOM 2

static INLINE GLuint

st_fb_orientation(const struct gl_framebuffer *fb)

{

   if (fb && _mesa_is_winsys_fbo(fb)) {

      /* Drawing into a window (on-screen buffer).

       *

       * Negate Y scale to flip image vertically.

       * The NDC Y coords prior to viewport transformation are in the range

       * [y=-1=bottom, y=1=top]

       * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where

       * H is the window height.

       * Use the viewport transformation to invert Y.

       */

      return Y_0_TOP;

   }

   else {

      /* Drawing into user-created FBO (very likely a texture).

       *

       * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.

       */

      return Y_0_BOTTOM;

   }

}

/** clear-alloc a struct-sized object, with casting */

#define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))

extern struct st_context *

st_create_context(gl_api api, struct pipe_context *pipe,

                  const struct gl_config *visual,

                  struct st_context *share,

                  const struct st_config_options *options);

extern void

st_destroy_context(struct st_context *st);

#endif