st_cb_drawpixels.c File Reference

Include dependency graph for st_cb_drawpixels.c:

Go to the source code of this file.

Functions
static GLboolean	is_passthrough_program (const struct gl_fragment_program *prog)
	Check if the given program is: 0: MOVE result.color, fragment.color; 1: END;.
static struct st_fragment_program *	combined_drawpix_fragment_program (GLcontext *ctx)
	Make fragment shader for glDraw/CopyPixels.
static struct st_fragment_program *	make_fragment_shader_z (struct st_context *st)
	Create fragment shader that does a TEX() instruction to get a Z value, then writes to FRAG_RESULT_DEPR.
static struct st_vertex_program *	st_make_passthrough_vertex_shader (struct st_context *st, GLboolean passColor)
	Create a simple vertex shader that just passes through the vertex position and texcoord (and optionally, color).
static GLenum	_mesa_base_format (GLenum format)
static struct pipe_texture *	make_texture (struct st_context *st, GLsizei width, GLsizei height, GLenum format, GLenum type, const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels)
	Make texture containing an image for glDrawPixels image.
static void	draw_quad (GLcontext *ctx, GLfloat x0, GLfloat y0, GLfloat z, GLfloat x1, GLfloat y1, const GLfloat *color, GLboolean invertTex)
	Draw quad with texcoords and optional color.
static void	draw_textured_quad (GLcontext *ctx, GLint x, GLint y, GLfloat z, GLsizei width, GLsizei height, GLfloat zoomX, GLfloat zoomY, struct pipe_texture *pt, struct st_vertex_program *stvp, struct st_fragment_program *stfp, const GLfloat *color, GLboolean invertTex)
static GLboolean	compatible_formats (GLenum format, GLenum type, enum pipe_format pipeFormat)
	Check if a GL format/type combination is a match to the given pipe format.
static GLboolean	any_fragment_ops (const struct st_context *st)
	Check if any per-fragment ops are enabled.
static GLboolean	any_pixel_transfer_ops (const struct st_context *st)
	Check if any pixel transfer ops are enabled.
static void	draw_blit (struct st_context *st, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels)
	Draw image with a blit, or other non-textured quad method.
static void	draw_stencil_pixels (GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels)
static void	st_DrawPixels (GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels)
	Called via ctx->Driver.DrawPixels().
static void	copy_stencil_pixels (GLcontext *ctx, GLint srcx, GLint srcy, GLsizei width, GLsizei height, GLint dstx, GLint dsty)
static void	st_CopyPixels (GLcontext *ctx, GLint srcx, GLint srcy, GLsizei width, GLsizei height, GLint dstx, GLint dsty, GLenum type)
void	st_init_drawpixels_functions (struct dd_function_table *functions)
void	st_destroy_drawpix (struct st_context *st)

---

Function Documentation

static GLenum _mesa_base_format

(

GLenum

format

)

[static]

Definition at line 307 of file st_cb_drawpixels.c.

{
   switch (format) {
   case GL_DEPTH_COMPONENT:
      return GL_DEPTH_COMPONENT;
   case GL_STENCIL_INDEX:
      return GL_STENCIL_INDEX;
   default:
      return GL_RGBA;
   }
}

static GLboolean any_fragment_ops

(

const struct st_context *

st

)

[static]

Check if any per-fragment ops are enabled.

XXX probably move this to a re-usable place.

Definition at line 684 of file st_cb_drawpixels.c.

References pipe_depth_stencil_alpha_state::alpha, st_context::blend, pipe_blend_state::blend_enable, pipe_depth_stencil_alpha_state::depth, st_context::depth_stencil, pipe_depth_state::enabled, pipe_alpha_state::enabled, pipe_blend_state::logicop_enable, and st_context::state.

{
   if (st->state.depth_stencil.alpha.enabled ||
       st->state.depth_stencil.depth.enabled ||
       st->state.blend.blend_enable ||
       st->state.blend.logicop_enable)
      /* XXX more checks */
      return GL_TRUE;
   else
      return GL_FALSE;
}

static GLboolean any_pixel_transfer_ops

(

const struct st_context *

st

)

[static]

Check if any pixel transfer ops are enabled.

XXX probably move this to a re-usable place.

Definition at line 702 of file st_cb_drawpixels.c.

References st_context::ctx.

{
   if (st->ctx->Pixel.RedScale != 1.0 ||
       st->ctx->Pixel.RedBias != 0.0 ||
       st->ctx->Pixel.GreenScale != 1.0 ||
       st->ctx->Pixel.GreenBias != 0.0 ||
       st->ctx->Pixel.BlueScale != 1.0 ||
       st->ctx->Pixel.BlueBias != 0.0 ||
       st->ctx->Pixel.AlphaScale != 1.0 ||
       st->ctx->Pixel.AlphaBias != 0.0 ||
       st->ctx->Pixel.MapColorFlag)
      /* XXX more checks */
      return GL_TRUE;
   else
      return GL_FALSE;
}

static struct st_fragment_program* combined_drawpix_fragment_program

(

GLcontext *

ctx

)

[static, read]

Make fragment shader for glDraw/CopyPixels.

This shader is made by combining the pixel transfer shader with the user-defined shader.

Definition at line 96 of file st_cb_drawpixels.c.

References st_fragment_program::Base, st_context::combined_prog, st_context::combined_prog_sn, st_context::fp, is_passthrough_program(), PIPE_SHADER_FRAGMENT, st_context::pixel_xfer, st_context::program, st_fragment_program::serialNo, st_translate_fragment_program(), st_upload_constants(), st_context::user_prog_sn, and st_context::xfer_prog_sn.

{
   struct st_context *st = ctx->st;
   struct st_fragment_program *stfp;

   if (st->pixel_xfer.program->serialNo == st->pixel_xfer.xfer_prog_sn
       && st->fp->serialNo == st->pixel_xfer.user_prog_sn) {
      /* the pixel tranfer program has not changed and the user-defined
       * program has not changed, so re-use the combined program.
       */
      stfp = st->pixel_xfer.combined_prog;
   }
   else {
      /* Concatenate the pixel transfer program with the current user-
       * defined program.
       */
      if (is_passthrough_program(&st->fp->Base)) {
         stfp = (struct st_fragment_program *)
            _mesa_clone_program(ctx, &st->pixel_xfer.program->Base.Base);
      }
      else {
#if 0
         printf("Base program:\n");
         _mesa_print_program(&st->fp->Base.Base);
         printf("DrawPix program:\n");
         _mesa_print_program(&st->pixel_xfer.program->Base.Base);
#endif
         stfp = (struct st_fragment_program *)
            _mesa_combine_programs(ctx,
                                   &st->pixel_xfer.program->Base.Base,
                                   &st->fp->Base.Base);
      }

#if 0
      {
         struct gl_program *p = &stfp->Base.Base;
         printf("Combined DrawPixels program:\n");
         _mesa_print_program(p);
         printf("InputsRead: 0x%x\n", p->InputsRead);
         printf("OutputsWritten: 0x%x\n", p->OutputsWritten);
         _mesa_print_parameter_list(p->Parameters);
      }
#endif

      /* translate to TGSI tokens */
      st_translate_fragment_program(st, stfp, NULL);

      /* save new program, update serial numbers */
      st->pixel_xfer.xfer_prog_sn = st->pixel_xfer.program->serialNo;
      st->pixel_xfer.user_prog_sn = st->fp->serialNo;
      st->pixel_xfer.combined_prog_sn = stfp->serialNo;
      st->pixel_xfer.combined_prog = stfp;
   }

   /* Ideally we'd have updated the pipe constants during the normal
    * st/atom mechanism.  But we can't since this is specific to glDrawPixels.
    */
   st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT);

   return stfp;
}

static GLboolean compatible_formats	(	GLenum	format,
		GLenum	type,
		enum pipe_format	pipeFormat
	)			[static]

Check if a GL format/type combination is a match to the given pipe format.

XXX probably move this to a re-usable place.

Definition at line 627 of file st_cb_drawpixels.c.

References PIPE_FORMAT_A8R8G8B8_UNORM, PIPE_FORMAT_R5G6B5_UNORM, PIPE_FORMAT_R8G8B8A8_UNORM, PIPE_FORMAT_S8_UNORM, and PIPE_FORMAT_Z32_UNORM.

{
   static const GLuint one = 1;
   GLubyte littleEndian = *((GLubyte *) &one);

   if (pipeFormat == PIPE_FORMAT_R8G8B8A8_UNORM &&
       format == GL_RGBA &&
       type == GL_UNSIGNED_BYTE &&
       !littleEndian) {
      return GL_TRUE;
   }
   else if (pipeFormat == PIPE_FORMAT_R8G8B8A8_UNORM &&
            format == GL_ABGR_EXT &&
            type == GL_UNSIGNED_BYTE &&
            littleEndian) {
      return GL_TRUE;
   }
   else if (pipeFormat == PIPE_FORMAT_A8R8G8B8_UNORM &&
            format == GL_BGRA &&
            type == GL_UNSIGNED_BYTE &&
            littleEndian) {
      return GL_TRUE;
   }
   else if (pipeFormat == PIPE_FORMAT_R5G6B5_UNORM &&
            format == GL_RGB &&
            type == GL_UNSIGNED_SHORT_5_6_5) {
      /* endian don't care */
      return GL_TRUE;
   }
   else if (pipeFormat == PIPE_FORMAT_R5G6B5_UNORM &&
            format == GL_BGR &&
            type == GL_UNSIGNED_SHORT_5_6_5_REV) {
      /* endian don't care */
      return GL_TRUE;
   }
   else if (pipeFormat == PIPE_FORMAT_S8_UNORM &&
            format == GL_STENCIL_INDEX &&
            type == GL_UNSIGNED_BYTE) {
      return GL_TRUE;
   }
   else if (pipeFormat == PIPE_FORMAT_Z32_UNORM &&
            format == GL_DEPTH_COMPONENT &&
            type == GL_UNSIGNED_INT) {
      return GL_TRUE;
   }
   /* XXX add more cases */
   else {
      return GL_FALSE;
   }
}

static void copy_stencil_pixels	(	GLcontext *	ctx,
		GLint	srcx,
		GLint	srcy,
		GLsizei	width,
		GLsizei	height,
		GLint	dstx,
		GLint	dsty
	)			[static]

Definition at line 888 of file st_cb_drawpixels.c.

References assert, pipe_surface::block, pipe_surface::buffer, pipe_surface::format, pipe_screen::get_tex_surface, pipe_format_block::height, PIPE_BUFFER_USAGE_CPU_WRITE, PIPE_FORMAT_S8_UNORM, PIPE_FORMAT_S8Z24_UNORM, pipe_surface_reference(), pipe_format_block::size, st_fb_orientation(), st_read_stencil_pixels(), st_renderbuffer(), pipe_surface::stride, pipe_screen::surface_map, pipe_screen::surface_unmap, st_renderbuffer::texture, pipe_format_block::width, and Y_0_TOP.

{
   struct st_renderbuffer *rbDraw = st_renderbuffer(ctx->DrawBuffer->_StencilBuffer);
   struct pipe_screen *screen = ctx->st->pipe->screen;
   struct pipe_surface *psDraw;
   ubyte *drawMap;
   ubyte *buffer;
   int i;

   buffer = malloc(width * height * sizeof(ubyte));
   if (!buffer) {
      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)");
      return;
   }

   /* this will do stencil pixel transfer ops */
   st_read_stencil_pixels(ctx, srcx, srcy, width, height, GL_UNSIGNED_BYTE,
                          &ctx->DefaultPacking, buffer);

   psDraw = screen->get_tex_surface(screen, rbDraw->texture, 0, 0, 0,
                                    PIPE_BUFFER_USAGE_CPU_WRITE);

   assert(psDraw->block.width == 1);
   assert(psDraw->block.height == 1);
   
   /* map the stencil buffer */
   drawMap = screen->surface_map(screen, psDraw, PIPE_BUFFER_USAGE_CPU_WRITE);

   /* draw */
   /* XXX PixelZoom not handled yet */
   for (i = 0; i < height; i++) {
      ubyte *dst;
      const ubyte *src;
      int y;

      y = dsty + i;

      if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
         y = ctx->DrawBuffer->Height - y - 1;
      }

      dst = drawMap + y * psDraw->stride + dstx * psDraw->block.size;
      src = buffer + i * width;

      switch (psDraw->format) {
      case PIPE_FORMAT_S8Z24_UNORM:
         {
            uint *dst4 = (uint *) dst;
            int j;
            for (j = 0; j < width; j++) {
               *dst4 = (*dst4 & 0xffffff) | (src[j] << 24);
               dst4++;
            }
         }
         break;
      case PIPE_FORMAT_S8_UNORM:
         memcpy(dst, src, width);
         break;
      default:
         assert(0);
      }
   }

   free(buffer);

   /* unmap the stencil buffer */
   screen->surface_unmap(screen, psDraw);
   pipe_surface_reference(&psDraw, NULL);
}

static void draw_blit	(	struct st_context *	st,
		GLsizei	width,
		GLsizei	height,
		GLenum	format,
		GLenum	type,
		const GLvoid *	pixels
	)			[static]

Draw image with a blit, or other non-textured quad method.

Definition at line 724 of file st_cb_drawpixels.c.

{


}

static void draw_quad	(	GLcontext *	ctx,
		GLfloat	x0,
		GLfloat	y0,
		GLfloat	z,
		GLfloat	x1,
		GLfloat	y1,
		const GLfloat *	color,
		GLboolean	invertTex
	)			[static]

Draw quad with texcoords and optional color.

Coords are window coords with y=0=bottom.

Parameters:

	color	may be null
	invertTex	if true, flip texcoords vertically

Definition at line 416 of file st_cb_drawpixels.c.

References st_context::ctx, pipe_buffer_create(), pipe_buffer_map(), pipe_buffer_reference(), pipe_buffer_unmap(), PIPE_BUFFER_USAGE_CPU_WRITE, PIPE_BUFFER_USAGE_VERTEX, PIPE_PRIM_QUADS, pipe_context::screen, and util_draw_vertex_buffer().

{
   struct st_context *st = ctx->st;
   struct pipe_context *pipe = ctx->st->pipe;
   GLfloat verts[4][3][4]; /* four verts, three attribs, XYZW */

   /* setup vertex data */
   {
      const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
      const GLfloat fb_width = (GLfloat) fb->Width;
      const GLfloat fb_height = (GLfloat) fb->Height;
      const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f;
      const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f;
      const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f;
      const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f;
      const GLfloat sLeft = 0.0f, sRight = 1.0f;
      const GLfloat tTop = invertTex, tBot = 1.0f - tTop;
      GLuint tex, i;

      /* upper-left */
      verts[0][0][0] = clip_x0;    /* v[0].attr[0].x */
      verts[0][0][1] = clip_y0;    /* v[0].attr[0].y */

      /* upper-right */
      verts[1][0][0] = clip_x1;
      verts[1][0][1] = clip_y0;

      /* lower-right */
      verts[2][0][0] = clip_x1;
      verts[2][0][1] = clip_y1;

      /* lower-left */
      verts[3][0][0] = clip_x0;
      verts[3][0][1] = clip_y1;

      tex = color ? 2 : 1;
      verts[0][tex][0] = sLeft; /* v[0].attr[tex].s */
      verts[0][tex][1] = tTop;  /* v[0].attr[tex].t */
      verts[1][tex][0] = sRight;
      verts[1][tex][1] = tTop;
      verts[2][tex][0] = sRight;
      verts[2][tex][1] = tBot;
      verts[3][tex][0] = sLeft;
      verts[3][tex][1] = tBot;

      /* same for all verts: */
      if (color) {
         for (i = 0; i < 4; i++) {
            verts[i][0][2] = z;   /*Z*/
            verts[i][0][3] = 1.0f; /*W*/
            verts[i][1][0] = color[0];
            verts[i][1][1] = color[1];
            verts[i][1][2] = color[2];
            verts[i][1][3] = color[3];
            verts[i][2][2] = 0.0f; /*R*/
            verts[i][2][3] = 1.0f; /*Q*/
         }
      }
      else {
         for (i = 0; i < 4; i++) {
            verts[i][0][2] = z;   /*Z*/
            verts[i][0][3] = 1.0f; /*W*/
            verts[i][1][2] = 0.0f; /*R*/
            verts[i][1][3] = 1.0f; /*Q*/
         }
      }
   }

   {
      struct pipe_buffer *buf;
      ubyte *map;

      /* allocate/load buffer object with vertex data */
      buf = pipe_buffer_create(pipe->screen, 32, PIPE_BUFFER_USAGE_VERTEX,
                               sizeof(verts));
      map = pipe_buffer_map(pipe->screen, buf, PIPE_BUFFER_USAGE_CPU_WRITE);
      memcpy(map, verts, sizeof(verts));
      pipe_buffer_unmap(pipe->screen, buf);

      util_draw_vertex_buffer(pipe, buf, 0,
                              PIPE_PRIM_QUADS,
                              4,  /* verts */
                              3); /* attribs/vert */
      pipe_buffer_reference(pipe->screen, &buf, NULL);
   }
}

static void draw_stencil_pixels	(	GLcontext *	ctx,
		GLint	x,
		GLint	y,
		GLsizei	width,
		GLsizei	height,
		GLenum	type,
		const struct gl_pixelstore_attrib *	unpack,
		const GLvoid *	pixels
	)			[static]

Definition at line 734 of file st_cb_drawpixels.c.

References assert, pipe_context::flush, pipe_surface::format, pipe_screen::get_tex_surface, MAX_WIDTH, MIN2, st_context::pipe, PIPE_BUFFER_USAGE_CPU_WRITE, PIPE_FLUSH_RENDER_CACHE, PIPE_FORMAT_S8_UNORM, PIPE_FORMAT_S8Z24_UNORM, pipe_surface_reference(), pipe_context::screen, st_fb_orientation(), st_renderbuffer(), pipe_surface::stride, pipe_screen::surface_map, pipe_screen::surface_unmap, st_renderbuffer::texture, and Y_0_TOP.

{
   struct st_context *st = ctx->st;
   struct pipe_context *pipe = st->pipe;
   struct pipe_screen *screen = pipe->screen;
   struct st_renderbuffer *strb;
   struct pipe_surface *ps;
   const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
   GLint skipPixels;
   ubyte *stmap;

   pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);

   strb = st_renderbuffer(ctx->DrawBuffer->
                          Attachment[BUFFER_STENCIL].Renderbuffer);
   ps = screen->get_tex_surface(screen, strb->texture, 0, 0, 0,
                                PIPE_BUFFER_USAGE_CPU_WRITE);

   /* map the stencil buffer */
   stmap = screen->surface_map(screen, ps, 
                               PIPE_BUFFER_USAGE_CPU_WRITE);

   /* if width > MAX_WIDTH, have to process image in chunks */
   skipPixels = 0;
   while (skipPixels < width) {
      const GLint spanX = x + skipPixels;
      const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
      GLint row;
      for (row = 0; row < height; row++) {
         GLint spanY = y + row;
         GLubyte values[MAX_WIDTH];
         GLenum destType = GL_UNSIGNED_BYTE;
         const GLvoid *source = _mesa_image_address2d(unpack, pixels,
                                                      width, height,
                                                      GL_COLOR_INDEX, type,
                                                      row, skipPixels);
         _mesa_unpack_stencil_span(ctx, spanWidth, destType, values,
                                   type, source, unpack,
                                   ctx->_ImageTransferState);
         if (zoom) {
            /*
            _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth,
                                              spanX, spanY, values);
            */
         }
         else {
            if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
               spanY = ctx->DrawBuffer->Height - spanY - 1;
            }

            switch (ps->format) {
            case PIPE_FORMAT_S8_UNORM:
               {
                  ubyte *dest = stmap + spanY * ps->stride + spanX;
                  memcpy(dest, values, spanWidth);
               }
               break;
            case PIPE_FORMAT_S8Z24_UNORM:
               {
                  uint *dest = (uint *) (stmap + spanY * ps->stride + spanX*4);
                  GLint k;
                  for (k = 0; k < spanWidth; k++) {
                     uint p = dest[k];
                     p = (p & 0xffffff) | (values[k] << 24);
                     dest[k] = p;
                  }
               }
               break;
            default:
               assert(0);
            }
         }
      }
      skipPixels += spanWidth;
   }

   /* unmap the stencil buffer */
   screen->surface_unmap(screen, ps);
   pipe_surface_reference(&ps, NULL);
}

static void draw_textured_quad	(	GLcontext *	ctx,
		GLint	x,
		GLint	y,
		GLfloat	z,
		GLsizei	width,
		GLsizei	height,
		GLfloat	zoomX,
		GLfloat	zoomY,
		struct pipe_texture *	pt,
		struct st_vertex_program *	stvp,
		struct st_fragment_program *	stfp,
		const GLfloat *	color,
		GLboolean	invertTex
	)			[static]

Definition at line 508 of file st_cb_drawpixels.c.

References assert, cso_restore_fragment_shader(), cso_restore_rasterizer(), cso_restore_sampler_textures(), cso_restore_samplers(), cso_restore_vertex_shader(), cso_restore_viewport(), cso_save_fragment_shader(), cso_save_rasterizer(), cso_save_sampler_textures(), cso_save_samplers(), cso_save_vertex_shader(), cso_save_viewport(), cso_set_fragment_shader_handle(), cso_set_rasterizer(), cso_set_vertex_shader_handle(), cso_set_viewport(), cso_single_sampler(), cso_single_sampler_done(), draw_quad(), st_vertex_program::driver_shader, st_fragment_program::driver_shader, pipe_screen::get_param, pipe_rasterizer_state::gl_rasterization_rules, pipe_sampler_state::mag_img_filter, pipe_sampler_state::min_img_filter, pipe_sampler_state::min_mip_filter, pipe_sampler_state::normalized_coords, PIPE_CAP_MAX_TEXTURE_2D_LEVELS, PIPE_TEX_FILTER_NEAREST, PIPE_TEX_MIPFILTER_NONE, PIPE_TEX_WRAP_CLAMP, st_context::pixel_xfer, st_context::pixelmap_enabled, st_context::pixelmap_texture, pipe_viewport_state::scale, pipe_rasterizer_state::scissor, pipe_context::screen, pipe_context::set_sampler_textures, pipe_viewport_state::translate, pipe_sampler_state::wrap_r, pipe_sampler_state::wrap_s, and pipe_sampler_state::wrap_t.

{
   struct st_context *st = ctx->st;
   struct pipe_context *pipe = ctx->st->pipe;
   struct cso_context *cso = ctx->st->cso_context;
   GLfloat x0, y0, x1, y1;
   GLsizei maxSize;

   /* limit checks */
   /* XXX if DrawPixels image is larger than max texture size, break
    * it up into chunks.
    */
   maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
   assert(width <= maxSize);
   assert(height <= maxSize);

   cso_save_rasterizer(cso);
   cso_save_viewport(cso);
   cso_save_samplers(cso);
   cso_save_sampler_textures(cso);
   cso_save_fragment_shader(cso);
   cso_save_vertex_shader(cso);

   /* rasterizer state: just scissor */
   {
      struct pipe_rasterizer_state rasterizer;
      memset(&rasterizer, 0, sizeof(rasterizer));
      rasterizer.gl_rasterization_rules = 1;
      rasterizer.scissor = ctx->Scissor.Enabled;
      cso_set_rasterizer(cso, &rasterizer);
   }

   /* fragment shader state: TEX lookup program */
   cso_set_fragment_shader_handle(cso, stfp->driver_shader);

   /* vertex shader state: position + texcoord pass-through */
   cso_set_vertex_shader_handle(cso, stvp->driver_shader);


   /* texture sampling state: */
   {
      struct pipe_sampler_state sampler;
      memset(&sampler, 0, sizeof(sampler));
      sampler.wrap_s = PIPE_TEX_WRAP_CLAMP;
      sampler.wrap_t = PIPE_TEX_WRAP_CLAMP;
      sampler.wrap_r = PIPE_TEX_WRAP_CLAMP;
      sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
      sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
      sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
      sampler.normalized_coords = 1;

      cso_single_sampler(cso, 0, &sampler);
      if (st->pixel_xfer.pixelmap_enabled) {
         cso_single_sampler(cso, 1, &sampler);
      }
      cso_single_sampler_done(cso);
   }

   /* viewport state: viewport matching window dims */
   {
      const float width = (float) ctx->DrawBuffer->Width;
      const float height = (float) ctx->DrawBuffer->Height;
      struct pipe_viewport_state vp;
      vp.scale[0] =  0.5f * width;
      vp.scale[1] = -0.5f * height;
      vp.scale[2] = 1.0f;
      vp.scale[3] = 1.0f;
      vp.translate[0] = 0.5f * width;
      vp.translate[1] = 0.5f * height;
      vp.translate[2] = 0.0f;
      vp.translate[3] = 0.0f;
      cso_set_viewport(cso, &vp);
   }

   /* texture state: */
   if (st->pixel_xfer.pixelmap_enabled) {
      struct pipe_texture *textures[2];
      textures[0] = pt;
      textures[1] = st->pixel_xfer.pixelmap_texture;
      pipe->set_sampler_textures(pipe, 2, textures);
   }
   else {
      pipe->set_sampler_textures(pipe, 1, &pt);
   }

   /* Compute window coords (y=0=bottom) with pixel zoom.
    * Recall that these coords are transformed by the current
    * vertex shader and viewport transformation.
    */
   x0 = (GLfloat) x;
   x1 = x + width * ctx->Pixel.ZoomX;
   y0 = (GLfloat) y;
   y1 = y + height * ctx->Pixel.ZoomY;
   //if(!color)
   draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex);
   //else
   //printf("skip draw quad\n");
   /* restore state */
   cso_restore_rasterizer(cso);
   cso_restore_viewport(cso);
   cso_restore_samplers(cso);
   cso_restore_sampler_textures(cso);
   cso_restore_fragment_shader(cso);
   cso_restore_vertex_shader(cso);
}

static GLboolean is_passthrough_program

(

const struct gl_fragment_program *

prog

)

[static]

Check if the given program is: 0: MOVE result.color, fragment.color; 1: END;.

Definition at line 71 of file st_cb_drawpixels.c.

{
   if (prog->Base.NumInstructions == 2) {
      const struct prog_instruction *inst = prog->Base.Instructions;
      if (inst[0].Opcode == OPCODE_MOV &&
          inst[1].Opcode == OPCODE_END &&
          inst[0].DstReg.File == PROGRAM_OUTPUT &&
          inst[0].DstReg.Index == FRAG_RESULT_COLR &&
          inst[0].DstReg.WriteMask == WRITEMASK_XYZW &&
          inst[0].SrcReg[0].File == PROGRAM_INPUT &&
          inst[0].SrcReg[0].Index == FRAG_ATTRIB_COL0 &&
          inst[0].SrcReg[0].Swizzle == SWIZZLE_XYZW) {
         return GL_TRUE;
      }
   }
   return GL_FALSE;
}

static struct st_fragment_program* make_fragment_shader_z

(

struct st_context *

st

)

[static, read]

Create fragment shader that does a TEX() instruction to get a Z value, then writes to FRAG_RESULT_DEPR.

Pass fragment color through as-is.

Definition at line 165 of file st_cb_drawpixels.c.

References assert, st_context::ctx, st_context::drawpix, st_translate_fragment_program(), and st_context::z_shader.

{
   GLcontext *ctx = st->ctx;
   struct gl_program *p;
   GLuint ic = 0;

   if (st->drawpix.z_shader) {
      return st->drawpix.z_shader;
   }

   /*
    * Create shader now
    */
   p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
   if (!p)
      return NULL;

   p->NumInstructions = 3;

   p->Instructions = _mesa_alloc_instructions(p->NumInstructions);
   if (!p->Instructions) {
      ctx->Driver.DeleteProgram(ctx, p);
      return NULL;
   }
   _mesa_init_instructions(p->Instructions, p->NumInstructions);

   /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */
   p->Instructions[ic].Opcode = OPCODE_TEX;
   p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT;
   p->Instructions[ic].DstReg.Index = FRAG_RESULT_DEPR;
   p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Z;
   p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT;
   p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
   p->Instructions[ic].TexSrcUnit = 0;
   p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX;
   ic++;

   /* MOV result.color, fragment.color */
   p->Instructions[ic].Opcode = OPCODE_MOV;
   p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT;
   p->Instructions[ic].DstReg.Index = FRAG_RESULT_COLR;
   p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT;
   p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_COL0;
   ic++;

   /* END; */
   p->Instructions[ic++].Opcode = OPCODE_END;

   assert(ic == p->NumInstructions);

   p->InputsRead = FRAG_BIT_TEX0 | FRAG_BIT_COL0;
   p->OutputsWritten = (1 << FRAG_RESULT_COLR) | (1 << FRAG_RESULT_DEPR);
   p->SamplersUsed = 0x1;  /* sampler 0 (bit 0) is used */

   st->drawpix.z_shader = (struct st_fragment_program *) p;
   st_translate_fragment_program(st, st->drawpix.z_shader, NULL);

   return st->drawpix.z_shader;
}

static struct pipe_texture* make_texture	(	struct st_context *	st,
		GLsizei	width,
		GLsizei	height,
		GLenum	format,
		GLenum	type,
		const struct gl_pixelstore_attrib *	unpack,
		const GLvoid *	pixels
	)			[static, read]

Make texture containing an image for glDrawPixels image.

If 'pixels' is NULL, leave the texture image data undefined.

Definition at line 325 of file st_cb_drawpixels.c.

References _mesa_base_format(), assert, st_context::ctx, pipe_screen::get_tex_surface, st_context::pipe, PIPE_BUFFER_USAGE_CPU_WRITE, pipe_surface_reference(), PIPE_TEXTURE_2D, PIPE_TEXTURE_USAGE_SAMPLER, pipe_context::screen, st_ChooseTextureFormat(), st_mesa_format_to_pipe_format(), st_sizeof_format(), st_texture_create(), pipe_surface::stride, pipe_screen::surface_map, and pipe_screen::surface_unmap.

{
   GLcontext *ctx = st->ctx;
   struct pipe_context *pipe = st->pipe;
   struct pipe_screen *screen = pipe->screen;
   const struct gl_texture_format *mformat;
   struct pipe_texture *pt;
   enum pipe_format pipeFormat;
   GLuint cpp;
   GLenum baseFormat;

   baseFormat = _mesa_base_format(format);

   mformat = st_ChooseTextureFormat(ctx, baseFormat, format, type);
   assert(mformat);

   pipeFormat = st_mesa_format_to_pipe_format(mformat->MesaFormat);
   assert(pipeFormat);
   cpp = st_sizeof_format(pipeFormat);

   pixels = _mesa_map_drawpix_pbo(ctx, unpack, pixels);
   if (!pixels)
      return NULL;

   pt = st_texture_create(st, PIPE_TEXTURE_2D, pipeFormat, 0, width, height,
                          1, 0,
                          PIPE_TEXTURE_USAGE_SAMPLER);
   if (!pt) {
      _mesa_unmap_drawpix_pbo(ctx, unpack);
      return NULL;
   }

   {
      struct pipe_surface *surface;
      static const GLuint dstImageOffsets = 0;
      GLboolean success;
      GLubyte *dest;
      const GLbitfield imageTransferStateSave = ctx->_ImageTransferState;

      /* we'll do pixel transfer in a fragment shader */
      ctx->_ImageTransferState = 0x0;

      surface = screen->get_tex_surface(screen, pt, 0, 0, 0,
                                        PIPE_BUFFER_USAGE_CPU_WRITE);

      /* map texture surface */
      dest = screen->surface_map(screen, surface,
                                 PIPE_BUFFER_USAGE_CPU_WRITE);

      /* Put image into texture surface.
       * Note that the image is actually going to be upside down in
       * the texture.  We deal with that with texcoords.
       */
      success = mformat->StoreImage(ctx, 2,           /* dims */
                                    baseFormat,       /* baseInternalFormat */
                                    mformat,          /* gl_texture_format */
                                    dest,             /* dest */
                                    0, 0, 0,          /* dstX/Y/Zoffset */
                                    surface->stride,  /* dstRowStride, bytes */
                                    &dstImageOffsets, /* dstImageOffsets */
                                    width, height, 1, /* size */
                                    format, type,     /* src format/type */
                                    pixels,           /* data source */
                                    unpack);

      /* unmap */
      screen->surface_unmap(screen, surface);
      pipe_surface_reference(&surface, NULL);

      assert(success);

      /* restore */
      ctx->_ImageTransferState = imageTransferStateSave;
   }

   _mesa_unmap_drawpix_pbo(ctx, unpack);

   return pt;
}

static void st_CopyPixels	(	GLcontext *	ctx,
		GLint	srcx,
		GLint	srcy,
		GLsizei	width,
		GLsizei	height,
		GLint	dstx,
		GLint	dsty,
		GLenum	type
	)			[static]

Definition at line 962 of file st_cb_drawpixels.c.

References assert, combined_drawpix_fragment_program(), copy_stencil_pixels(), draw_textured_quad(), FALSE, pipe_context::flush, pipe_texture::format, pipe_screen::get_tex_surface, pipe_screen::is_format_supported, make_fragment_shader_z(), st_context::pipe, PIPE_BUFFER_USAGE_CPU_READ, PIPE_BUFFER_USAGE_CPU_WRITE, PIPE_BUFFER_USAGE_GPU_READ, PIPE_BUFFER_USAGE_GPU_WRITE, PIPE_FLUSH_RENDER_CACHE, PIPE_FORMAT_NONE, pipe_get_tile_rgba(), pipe_get_tile_z(), pipe_put_tile_rgba(), pipe_put_tile_z(), pipe_surface_reference(), PIPE_TEXTURE_2D, pipe_texture_reference(), PIPE_TEXTURE_USAGE_DEPTH_STENCIL, PIPE_TEXTURE_USAGE_SAMPLER, pipe_context::screen, st_choose_format(), st_fb_orientation(), st_get_color_read_renderbuffer(), st_make_passthrough_vertex_shader(), st_renderbuffer(), st_texture_create(), st_validate_state(), pipe_context::surface_copy, st_renderbuffer::texture, and Y_0_TOP.

{
   struct st_context *st = ctx->st;
   struct pipe_context *pipe = st->pipe;
   struct pipe_screen *screen = pipe->screen;
   struct st_renderbuffer *rbRead;
   struct st_vertex_program *stvp;
   struct st_fragment_program *stfp;
   struct pipe_surface *psTex;
   struct pipe_texture *pt;
   GLfloat *color;
   enum pipe_format srcFormat, texFormat;

   /* make sure rendering has completed */
   pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);

   st_validate_state(st);

   if (type == GL_STENCIL) {
      /* can't use texturing to do stencil */
      copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
      return;
   }

   if (type == GL_COLOR) {
      rbRead = st_get_color_read_renderbuffer(ctx);
      color = NULL;
      stfp = combined_drawpix_fragment_program(ctx);
      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_FALSE);
   }
   else {
      assert(type == GL_DEPTH);
      rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer);
      color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
      stfp = make_fragment_shader_z(ctx->st);
      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE);
   }

   srcFormat = rbRead->texture->format;

   if (screen->is_format_supported(screen, srcFormat, PIPE_TEXTURE_2D, 
                                   PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
      texFormat = srcFormat;
   }
   else {
      /* srcFormat can't be used as a texture format */
      if (type == GL_DEPTH) {
         texFormat = st_choose_format(pipe, GL_DEPTH_COMPONENT, PIPE_TEXTURE_2D, 
                                      PIPE_TEXTURE_USAGE_DEPTH_STENCIL);
         assert(texFormat != PIPE_FORMAT_NONE); /* XXX no depth texture formats??? */
      }
      else {
         /* default color format */
         texFormat = st_choose_format(pipe, GL_RGBA, PIPE_TEXTURE_2D, 
                                      PIPE_TEXTURE_USAGE_SAMPLER);
         assert(texFormat != PIPE_FORMAT_NONE);
      }
   }

   pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, texFormat, 0,
                          width, height, 1, 0,
                          PIPE_TEXTURE_USAGE_SAMPLER);
   if (!pt)
      return;

   if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
      srcy = ctx->DrawBuffer->Height - srcy - height;
   }

   if (srcFormat == texFormat) {
      /* copy source framebuffer surface into mipmap/texture */
      struct pipe_surface *psRead = screen->get_tex_surface(screen,
                                       rbRead->texture, 0, 0, 0,
                                       PIPE_BUFFER_USAGE_GPU_READ);
      psTex = screen->get_tex_surface(screen, pt, 0, 0, 0, 
                                      PIPE_BUFFER_USAGE_GPU_WRITE );
      pipe->surface_copy(pipe,
                         FALSE,
                         psTex, /* dest */
                         0, 0, /* destx/y */
                         psRead,
                         srcx, srcy, width, height);
      pipe_surface_reference(&psRead, NULL);
   }
   else {
      /* CPU-based fallback/conversion */
      struct pipe_surface *psRead = screen->get_tex_surface(screen,
                                       rbRead->texture, 0, 0, 0,
                                       PIPE_BUFFER_USAGE_CPU_READ);

      psTex = screen->get_tex_surface(screen, pt, 0, 0, 0, 
                                      PIPE_BUFFER_USAGE_CPU_WRITE );

      if (type == GL_COLOR) {
         /* alternate path using get/put_tile() */
         GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));

         pipe_get_tile_rgba(psRead, srcx, srcy, width, height, buf);
         pipe_put_tile_rgba(psTex, 0, 0, width, height, buf);

         free(buf);
      }
      else {
         /* GL_DEPTH */
         GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint));
         pipe_get_tile_z(psRead, srcx, srcy, width, height, buf);
         pipe_put_tile_z(psTex, 0, 0, width, height, buf);
         free(buf);
      }
      pipe_surface_reference(&psRead, NULL);
   }

   pipe_surface_reference(&psTex, NULL);

   /* draw textured quad */
   draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2],
                      width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
                      pt, stvp, stfp, color, GL_TRUE);

   pipe_texture_reference(&pt, NULL);
}

void st_destroy_drawpix

(

struct st_context *

st

)

Definition at line 1096 of file st_cb_drawpixels.c.

References st_context::combined_prog, st_context::drawpix, st_context::pixel_xfer, st_reference_fragprog(), st_reference_vertprog(), st_context::vert_shaders, and st_context::z_shader.

{
   st_reference_fragprog(st, &st->drawpix.z_shader, NULL);
   st_reference_fragprog(st, &st->pixel_xfer.combined_prog, NULL);
   st_reference_vertprog(st, &st->drawpix.vert_shaders[0], NULL);
   st_reference_vertprog(st, &st->drawpix.vert_shaders[1], NULL);
}

static void st_DrawPixels	(	GLcontext *	ctx,
		GLint	x,
		GLint	y,
		GLsizei	width,
		GLsizei	height,
		GLenum	format,
		GLenum	type,
		const struct gl_pixelstore_attrib *	unpack,
		const GLvoid *	pixels
	)			[static]

Called via ctx->Driver.DrawPixels().

Definition at line 823 of file st_cb_drawpixels.c.

References pipe_framebuffer_state::cbufs, combined_drawpix_fragment_program(), draw_blit(), draw_stencil_pixels(), draw_textured_quad(), FALSE, pipe_surface::format, st_context::framebuffer, make_fragment_shader_z(), make_texture(), pipe_texture_reference(), st_make_passthrough_vertex_shader(), st_validate_state(), st_context::state, TRUE, and pipe_framebuffer_state::zsbuf.

{
   struct st_fragment_program *stfp;
   struct st_vertex_program *stvp;
   struct st_context *st = ctx->st;
   struct pipe_surface *ps;
   GLuint bufferFormat;
   const GLfloat *color;

   if (format == GL_STENCIL_INDEX) {
      draw_stencil_pixels(ctx, x, y, width, height, type, unpack, pixels);
      return;
   }

   _mesa_set_vp_override( ctx, TRUE );
   _mesa_update_state( ctx );

   st_validate_state(st);

   if (format == GL_DEPTH_COMPONENT) {
      ps = st->state.framebuffer.zsbuf;
      stfp = make_fragment_shader_z(ctx->st);
      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE);
      color = ctx->Current.RasterColor;
   }
   else if (format == GL_STENCIL_INDEX) {
      ps = st->state.framebuffer.zsbuf;
      /* XXX special case - can't use texture map */
      color = NULL;
   }
   else {
      ps = st->state.framebuffer.cbufs[0];
      stfp = combined_drawpix_fragment_program(ctx);
      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_FALSE);
      color = NULL;
   }

   bufferFormat = ps->format;

   if (1/*any_fragment_ops(st) ||
       any_pixel_transfer_ops(st) ||
       !compatible_formats(format, type, ps->format)*/) {
      /* textured quad */
      struct pipe_texture *pt
         = make_texture(ctx->st, width, height, format, type, unpack, pixels);
      if (pt) {
         draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2],
                            width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
                            pt, stvp, stfp, color, GL_FALSE);
         pipe_texture_reference(&pt, NULL);
      }
   }
   else {
      /* blit */
      draw_blit(st, width, height, format, type, pixels);
   }

   _mesa_set_vp_override( ctx, FALSE );
}

void st_init_drawpixels_functions

(

struct dd_function_table *

functions

)

Definition at line 1088 of file st_cb_drawpixels.c.

References st_CopyPixels(), and st_DrawPixels().

{
   functions->DrawPixels = st_DrawPixels;
   functions->CopyPixels = st_CopyPixels;
}

static struct st_vertex_program* st_make_passthrough_vertex_shader	(	struct st_context *	st,
		GLboolean	passColor
	)			[static, read]

Create a simple vertex shader that just passes through the vertex position and texcoord (and optionally, color).

Definition at line 232 of file st_cb_drawpixels.c.

References assert, st_context::ctx, st_context::drawpix, st_translate_vertex_program(), and st_context::vert_shaders.

{
   GLcontext *ctx = st->ctx;
   struct st_vertex_program *stvp;
   struct gl_program *p;
   GLuint ic = 0;

   if (st->drawpix.vert_shaders[passColor])
      return st->drawpix.vert_shaders[passColor];

   /*
    * Create shader now
    */
   p = ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
   if (!p)
      return NULL;

   if (passColor)
      p->NumInstructions = 4;
   else
      p->NumInstructions = 3;

   p->Instructions = _mesa_alloc_instructions(p->NumInstructions);
   if (!p->Instructions) {
      ctx->Driver.DeleteProgram(ctx, p);
      return NULL;
   }
   _mesa_init_instructions(p->Instructions, p->NumInstructions);
   /* MOV result.pos, vertex.pos; */
   p->Instructions[0].Opcode = OPCODE_MOV;
   p->Instructions[0].DstReg.File = PROGRAM_OUTPUT;
   p->Instructions[0].DstReg.Index = VERT_RESULT_HPOS;
   p->Instructions[0].SrcReg[0].File = PROGRAM_INPUT;
   p->Instructions[0].SrcReg[0].Index = VERT_ATTRIB_POS;
   /* MOV result.texcoord0, vertex.texcoord0; */
   p->Instructions[1].Opcode = OPCODE_MOV;
   p->Instructions[1].DstReg.File = PROGRAM_OUTPUT;
   p->Instructions[1].DstReg.Index = VERT_RESULT_TEX0;
   p->Instructions[1].SrcReg[0].File = PROGRAM_INPUT;
   p->Instructions[1].SrcReg[0].Index = VERT_ATTRIB_TEX0;
   ic = 2;
   if (passColor) {
      /* MOV result.color0, vertex.color0; */
      p->Instructions[ic].Opcode = OPCODE_MOV;
      p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT;
      p->Instructions[ic].DstReg.Index = VERT_RESULT_COL0;
      p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT;
      p->Instructions[ic].SrcReg[0].Index = VERT_ATTRIB_COLOR0;
      ic++;
   }

   /* END; */
   p->Instructions[ic].Opcode = OPCODE_END;
   ic++;

   assert(ic == p->NumInstructions);

   p->InputsRead = VERT_BIT_POS | VERT_BIT_TEX0;
   p->OutputsWritten = ((1 << VERT_RESULT_TEX0) |
                        (1 << VERT_RESULT_HPOS));
   if (passColor) {
      p->InputsRead |= VERT_BIT_COLOR0;
      p->OutputsWritten |= (1 << VERT_RESULT_COL0);
   }

   stvp = (struct st_vertex_program *) p;
   st_translate_vertex_program(st, stvp, NULL, NULL, NULL);

   st->drawpix.vert_shaders[passColor] = stvp;

   return stvp;
}

---