u_blit.c File Reference

Copy/blit pixel rect between surfaces. More...

Include dependency graph for u_blit.c:

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Data Structures
struct	blit_state
Functions
struct blit_state *	util_create_blit (struct pipe_context *pipe, struct cso_context *cso)
	Create state object for blit.
void	util_destroy_blit (struct blit_state *ctx)
	Destroy a blit context.
static unsigned	get_next_slot (struct blit_state *ctx)
static unsigned	setup_vertex_data (struct blit_state *ctx, float x0, float y0, float x1, float y1, float z)
	Setup vertex data for the textured quad we'll draw.
static unsigned	setup_vertex_data_tex (struct blit_state *ctx, float x0, float y0, float x1, float y1, float s0, float t0, float s1, float t1, float z)
	Setup vertex data for the textured quad we'll draw.
void	util_blit_pixels (struct blit_state *ctx, struct pipe_surface *src, int srcX0, int srcY0, int srcX1, int srcY1, struct pipe_surface *dst, int dstX0, int dstY0, int dstX1, int dstY1, float z, uint filter)
	Copy pixel block from src surface to dst surface.
void	util_blit_flush (struct blit_state *ctx)
void	util_blit_pixels_tex (struct blit_state *ctx, struct pipe_texture *tex, int srcX0, int srcY0, int srcX1, int srcY1, struct pipe_surface *dst, int dstX0, int dstY0, int dstX1, int dstY1, float z, uint filter)
	Copy pixel block from src texture to dst surface.

---

Detailed Description

Copy/blit pixel rect between surfaces.

Author:

Brian Paul

Definition in file u_blit.c.

---

Function Documentation

static unsigned get_next_slot

(

struct blit_state *

ctx

)

[static]

Definition at line 176 of file u_blit.c.

References blit_state::pipe, pipe_buffer_create(), PIPE_BUFFER_USAGE_VERTEX, pipe_context::screen, util_blit_flush(), blit_state::vbuf, blit_state::vbuf_slot, and blit_state::vertices.

{
   const unsigned max_slots = 4096 / sizeof ctx->vertices;

   if (ctx->vbuf_slot >= max_slots) 
      util_blit_flush( ctx );

   if (!ctx->vbuf) {
      ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
                                     32,
                                     PIPE_BUFFER_USAGE_VERTEX,
                                     max_slots * sizeof ctx->vertices);
   }
   
   return ctx->vbuf_slot++ * sizeof ctx->vertices;
}

static unsigned setup_vertex_data	(	struct blit_state *	ctx,
		float	x0,
		float	y0,
		float	x1,
		float	y1,
		float	z
	)			[static]

Setup vertex data for the textured quad we'll draw.

Note: y=0=top

Definition at line 200 of file u_blit.c.

References get_next_slot(), offset(), blit_state::pipe, pipe_buffer_map(), pipe_buffer_unmap(), PIPE_BUFFER_USAGE_CPU_WRITE, pipe_context::screen, blit_state::vbuf, and blit_state::vertices.

{
   void *buf;
   unsigned offset;

   ctx->vertices[0][0][0] = x0;
   ctx->vertices[0][0][1] = y0;
   ctx->vertices[0][0][2] = z;
   ctx->vertices[0][1][0] = 0.0f; /*s*/
   ctx->vertices[0][1][1] = 0.0f; /*t*/

   ctx->vertices[1][0][0] = x1;
   ctx->vertices[1][0][1] = y0;
   ctx->vertices[1][0][2] = z;
   ctx->vertices[1][1][0] = 1.0f; /*s*/
   ctx->vertices[1][1][1] = 0.0f; /*t*/

   ctx->vertices[2][0][0] = x1;
   ctx->vertices[2][0][1] = y1;
   ctx->vertices[2][0][2] = z;
   ctx->vertices[2][1][0] = 1.0f;
   ctx->vertices[2][1][1] = 1.0f;

   ctx->vertices[3][0][0] = x0;
   ctx->vertices[3][0][1] = y1;
   ctx->vertices[3][0][2] = z;
   ctx->vertices[3][1][0] = 0.0f;
   ctx->vertices[3][1][1] = 1.0f;

   offset = get_next_slot( ctx );

   buf = pipe_buffer_map(ctx->pipe->screen, ctx->vbuf,
                         PIPE_BUFFER_USAGE_CPU_WRITE);

   memcpy((char *)buf + offset, ctx->vertices, sizeof(ctx->vertices));

   pipe_buffer_unmap(ctx->pipe->screen, ctx->vbuf);

   return offset;
}

static unsigned setup_vertex_data_tex	(	struct blit_state *	ctx,
		float	x0,
		float	y0,
		float	x1,
		float	y1,
		float	s0,
		float	t0,
		float	s1,
		float	t1,
		float	z
	)			[static]

Setup vertex data for the textured quad we'll draw.

Note: y=0=top

Definition at line 248 of file u_blit.c.

References get_next_slot(), offset(), blit_state::pipe, pipe_buffer_map(), pipe_buffer_unmap(), PIPE_BUFFER_USAGE_CPU_WRITE, pipe_context::screen, blit_state::vbuf, and blit_state::vertices.

{
   void *buf;
   unsigned offset;

   ctx->vertices[0][0][0] = x0;
   ctx->vertices[0][0][1] = y0;
   ctx->vertices[0][0][2] = z;
   ctx->vertices[0][1][0] = s0; /*s*/
   ctx->vertices[0][1][1] = t0; /*t*/

   ctx->vertices[1][0][0] = x1;
   ctx->vertices[1][0][1] = y0;
   ctx->vertices[1][0][2] = z;
   ctx->vertices[1][1][0] = s1; /*s*/
   ctx->vertices[1][1][1] = t0; /*t*/

   ctx->vertices[2][0][0] = x1;
   ctx->vertices[2][0][1] = y1;
   ctx->vertices[2][0][2] = z;
   ctx->vertices[2][1][0] = s1;
   ctx->vertices[2][1][1] = t1;

   ctx->vertices[3][0][0] = x0;
   ctx->vertices[3][0][1] = y1;
   ctx->vertices[3][0][2] = z;
   ctx->vertices[3][1][0] = s0;
   ctx->vertices[3][1][1] = t1;

   offset = get_next_slot( ctx );

   buf = pipe_buffer_map(ctx->pipe->screen, ctx->vbuf,
                         PIPE_BUFFER_USAGE_CPU_WRITE);

   memcpy((char *)buf + offset, ctx->vertices, sizeof(ctx->vertices));

   pipe_buffer_unmap(ctx->pipe->screen, ctx->vbuf);

   return offset;
}

void util_blit_flush

(

struct blit_state *

ctx

)

Definition at line 450 of file u_blit.c.

References blit_state::pipe, pipe_buffer_reference(), pipe_context::screen, blit_state::vbuf, and blit_state::vbuf_slot.

{
   pipe_buffer_reference(ctx->pipe->screen, &ctx->vbuf, NULL);
   ctx->vbuf_slot = 0;
} 

void util_blit_pixels	(	struct blit_state *	ctx,
		struct pipe_surface *	src,
		int	srcX0,
		int	srcY0,
		int	srcX1,
		int	srcY1,
		struct pipe_surface *	dst,
		int	dstX0,
		int	dstY0,
		int	dstX1,
		int	dstY1,
		float	z,
		uint	filter
	)

Copy pixel block from src surface to dst surface.

Overlapping regions are acceptable. XXX need some control over blitting Z and/or stencil.

Definition at line 297 of file u_blit.c.

References abs(), assert, blit_state::blend, pipe_texture::block, pipe_framebuffer_state::cbufs, pipe_texture::compressed, blit_state::cso, cso_restore_blend(), cso_restore_depth_stencil_alpha(), cso_restore_fragment_shader(), cso_restore_framebuffer(), cso_restore_rasterizer(), cso_restore_sampler_textures(), cso_restore_samplers(), cso_restore_vertex_shader(), cso_restore_viewport(), cso_save_blend(), cso_save_depth_stencil_alpha(), cso_save_fragment_shader(), cso_save_framebuffer(), cso_save_rasterizer(), cso_save_sampler_textures(), cso_save_samplers(), cso_save_vertex_shader(), cso_save_viewport(), cso_set_blend(), cso_set_depth_stencil_alpha(), cso_set_fragment_shader_handle(), cso_set_framebuffer(), cso_set_rasterizer(), cso_set_sampler_textures(), cso_set_vertex_shader_handle(), cso_set_viewport(), cso_single_sampler(), cso_single_sampler_done(), pipe_texture::depth, blit_state::depthstencil, FALSE, pipe_texture::format, pipe_surface::format, blit_state::fs, pipe_screen::get_tex_surface, pipe_surface::height, pipe_framebuffer_state::height, pipe_texture::height, pipe_screen::is_format_supported, pipe_texture::last_level, pipe_sampler_state::mag_img_filter, MIN2, pipe_sampler_state::min_img_filter, pipe_framebuffer_state::num_cbufs, offset(), pf_get_block(), blit_state::pipe, PIPE_BUFFER_USAGE_GPU_WRITE, PIPE_PRIM_TRIANGLE_FAN, PIPE_TEX_MIPFILTER_LINEAR, PIPE_TEX_MIPFILTER_NEAREST, PIPE_TEXTURE_2D, PIPE_TEXTURE_USAGE_RENDER_TARGET, PIPE_TEXTURE_USAGE_SAMPLER, blit_state::rasterizer, blit_state::sampler, pipe_context::screen, setup_vertex_data(), pipe_context::surface_copy, pipe_texture::target, pipe_screen::tex_surface_release, pipe_screen::texture_create, pipe_screen::texture_release, util_draw_vertex_buffer(), blit_state::vbuf, blit_state::viewport, blit_state::vs, pipe_surface::width, pipe_framebuffer_state::width, and pipe_texture::width.

{
   struct pipe_context *pipe = ctx->pipe;
   struct pipe_screen *screen = pipe->screen;
   struct pipe_texture texTemp, *tex;
   struct pipe_surface *texSurf;
   struct pipe_framebuffer_state fb;
   const int srcW = abs(srcX1 - srcX0);
   const int srcH = abs(srcY1 - srcY0);
   const int srcLeft = MIN2(srcX0, srcX1);
   const int srcTop = MIN2(srcY0, srcY1);
   unsigned offset;

   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
          filter == PIPE_TEX_MIPFILTER_LINEAR);

   if (srcLeft != srcX0) {
      /* left-right flip */
      int tmp = dstX0;
      dstX0 = dstX1;
      dstX1 = tmp;
   }

   if (srcTop != srcY0) {
      /* up-down flip */
      int tmp = dstY0;
      dstY0 = dstY1;
      dstY1 = tmp;
   }

   assert(screen->is_format_supported(screen, src->format, PIPE_TEXTURE_2D,
                                      PIPE_TEXTURE_USAGE_SAMPLER, 0));
   assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
                                      PIPE_TEXTURE_USAGE_SAMPLER, 0));

   if(dst->format == src->format && (dstX1 - dstX0) == srcW && (dstY1 - dstY0) == srcH) {
      /* FIXME: this will most surely fail for overlapping rectangles */
      pipe->surface_copy(pipe, FALSE,
                         dst, dstX0, dstY0,   /* dest */
                         src, srcX0, srcY0, /* src */
                         srcW, srcH);     /* size */
      return;
   }
   
   assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
                                      PIPE_TEXTURE_USAGE_RENDER_TARGET, 0));

   /*
    * XXX for now we're always creating a temporary texture.
    * Strictly speaking that's not always needed.
    */

   /* create temp texture */
   memset(&texTemp, 0, sizeof(texTemp));
   texTemp.target = PIPE_TEXTURE_2D;
   texTemp.format = src->format;
   texTemp.last_level = 0;
   texTemp.width[0] = srcW;
   texTemp.height[0] = srcH;
   texTemp.depth[0] = 1;
   texTemp.compressed = 0;
   pf_get_block(src->format, &texTemp.block);

   tex = screen->texture_create(screen, &texTemp);
   if (!tex)
      return;

   texSurf = screen->get_tex_surface(screen, tex, 0, 0, 0, 
                                     PIPE_BUFFER_USAGE_GPU_WRITE);

   /* load temp texture */
   pipe->surface_copy(pipe, FALSE,
                      texSurf, 0, 0,   /* dest */
                      src, srcLeft, srcTop, /* src */
                      srcW, srcH);     /* size */

   /* free the surface, update the texture if necessary.
    */
   screen->tex_surface_release(screen, &texSurf);

   /* save state (restored below) */
   cso_save_blend(ctx->cso);
   cso_save_depth_stencil_alpha(ctx->cso);
   cso_save_rasterizer(ctx->cso);
   cso_save_samplers(ctx->cso);
   cso_save_sampler_textures(ctx->cso);
   cso_save_framebuffer(ctx->cso);
   cso_save_fragment_shader(ctx->cso);
   cso_save_vertex_shader(ctx->cso);
   cso_save_viewport(ctx->cso);

   /* set misc state we care about */
   cso_set_blend(ctx->cso, &ctx->blend);
   cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
   cso_set_viewport(ctx->cso, &ctx->viewport);

   /* sampler */
   ctx->sampler.min_img_filter = filter;
   ctx->sampler.mag_img_filter = filter;
   cso_single_sampler(ctx->cso, 0, &ctx->sampler);
   cso_single_sampler_done(ctx->cso);

   /* texture */
   cso_set_sampler_textures(ctx->cso, 1, &tex);

   /* shaders */
   cso_set_fragment_shader_handle(ctx->cso, ctx->fs);
   cso_set_vertex_shader_handle(ctx->cso, ctx->vs);

   /* drawing dest */
   memset(&fb, 0, sizeof(fb));
   fb.width = dst->width;
   fb.height = dst->height;
   fb.num_cbufs = 1;
   fb.cbufs[0] = dst;
   cso_set_framebuffer(ctx->cso, &fb);

   /* draw quad */
   offset = setup_vertex_data(ctx,
                              (float) dstX0, (float) dstY0, 
                              (float) dstX1, (float) dstY1, z);

   util_draw_vertex_buffer(ctx->pipe, ctx->vbuf, offset,
                           PIPE_PRIM_TRIANGLE_FAN,
                           4,  /* verts */
                           2); /* attribs/vert */

   /* restore state we changed */
   cso_restore_blend(ctx->cso);
   cso_restore_depth_stencil_alpha(ctx->cso);
   cso_restore_rasterizer(ctx->cso);
   cso_restore_samplers(ctx->cso);
   cso_restore_sampler_textures(ctx->cso);
   cso_restore_framebuffer(ctx->cso);
   cso_restore_fragment_shader(ctx->cso);
   cso_restore_vertex_shader(ctx->cso);
   cso_restore_viewport(ctx->cso);

   screen->texture_release(screen, &tex);
}

void util_blit_pixels_tex	(	struct blit_state *	ctx,
		struct pipe_texture *	tex,
		int	srcX0,
		int	srcY0,
		int	srcX1,
		int	srcY1,
		struct pipe_surface *	dst,
		int	dstX0,
		int	dstY0,
		int	dstX1,
		int	dstY1,
		float	z,
		uint	filter
	)

Copy pixel block from src texture to dst surface.

Overlapping regions are acceptable.

XXX Should support selection of level. XXX need some control over blitting Z and/or stencil.

Definition at line 466 of file u_blit.c.

References assert, blit_state::blend, pipe_framebuffer_state::cbufs, blit_state::cso, cso_restore_blend(), cso_restore_depth_stencil_alpha(), cso_restore_fragment_shader(), cso_restore_framebuffer(), cso_restore_rasterizer(), cso_restore_sampler_textures(), cso_restore_samplers(), cso_restore_vertex_shader(), cso_restore_viewport(), cso_save_blend(), cso_save_depth_stencil_alpha(), cso_save_fragment_shader(), cso_save_framebuffer(), cso_save_rasterizer(), cso_save_sampler_textures(), cso_save_samplers(), cso_save_vertex_shader(), cso_save_viewport(), cso_set_blend(), cso_set_depth_stencil_alpha(), cso_set_fragment_shader_handle(), cso_set_framebuffer(), cso_set_rasterizer(), cso_set_sampler_textures(), cso_set_vertex_shader_handle(), cso_set_viewport(), cso_single_sampler(), cso_single_sampler_done(), blit_state::depthstencil, pipe_surface::format, blit_state::fs, pipe_surface::height, pipe_framebuffer_state::height, pipe_texture::height, pipe_screen::is_format_supported, pipe_sampler_state::mag_img_filter, pipe_sampler_state::min_img_filter, pipe_framebuffer_state::num_cbufs, offset(), blit_state::pipe, PIPE_PRIM_TRIANGLE_FAN, PIPE_TEX_MIPFILTER_LINEAR, PIPE_TEX_MIPFILTER_NEAREST, PIPE_TEXTURE_2D, PIPE_TEXTURE_USAGE_RENDER_TARGET, blit_state::rasterizer, blit_state::sampler, pipe_context::screen, setup_vertex_data_tex(), util_draw_vertex_buffer(), blit_state::vbuf, blit_state::viewport, blit_state::vs, pipe_surface::width, pipe_framebuffer_state::width, and pipe_texture::width.

{
   struct pipe_context *pipe = ctx->pipe;
   struct pipe_screen *screen = pipe->screen;
   struct pipe_framebuffer_state fb;
   float s0, t0, s1, t1;
   unsigned offset;

   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
          filter == PIPE_TEX_MIPFILTER_LINEAR);

   assert(tex->width[0] != 0);
   assert(tex->height[0] != 0);

   s0 = srcX0 / (float)tex->width[0];
   s1 = srcX1 / (float)tex->width[0];
   t0 = srcY0 / (float)tex->height[0];
   t1 = srcY1 / (float)tex->height[0];

   assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
                                      PIPE_TEXTURE_USAGE_RENDER_TARGET, 0));

   /* save state (restored below) */
   cso_save_blend(ctx->cso);
   cso_save_depth_stencil_alpha(ctx->cso);
   cso_save_rasterizer(ctx->cso);
   cso_save_samplers(ctx->cso);
   cso_save_sampler_textures(ctx->cso);
   cso_save_framebuffer(ctx->cso);
   cso_save_fragment_shader(ctx->cso);
   cso_save_vertex_shader(ctx->cso);
   cso_save_viewport(ctx->cso);

   /* set misc state we care about */
   cso_set_blend(ctx->cso, &ctx->blend);
   cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
   cso_set_viewport(ctx->cso, &ctx->viewport);

   /* sampler */
   ctx->sampler.min_img_filter = filter;
   ctx->sampler.mag_img_filter = filter;
   cso_single_sampler(ctx->cso, 0, &ctx->sampler);
   cso_single_sampler_done(ctx->cso);

   /* texture */
   cso_set_sampler_textures(ctx->cso, 1, &tex);

   /* shaders */
   cso_set_fragment_shader_handle(ctx->cso, ctx->fs);
   cso_set_vertex_shader_handle(ctx->cso, ctx->vs);

   /* drawing dest */
   memset(&fb, 0, sizeof(fb));
   fb.width = dst->width;
   fb.height = dst->height;
   fb.num_cbufs = 1;
   fb.cbufs[0] = dst;
   cso_set_framebuffer(ctx->cso, &fb);

   /* draw quad */
   offset = setup_vertex_data_tex(ctx,
                                  (float) dstX0, (float) dstY0,
                                  (float) dstX1, (float) dstY1,
                                  s0, t0, s1, t1,
                                  z);

   util_draw_vertex_buffer(ctx->pipe, 
                           ctx->vbuf, offset,
                           PIPE_PRIM_TRIANGLE_FAN,
                           4,  /* verts */
                           2); /* attribs/vert */

   /* restore state we changed */
   cso_restore_blend(ctx->cso);
   cso_restore_depth_stencil_alpha(ctx->cso);
   cso_restore_rasterizer(ctx->cso);
   cso_restore_samplers(ctx->cso);
   cso_restore_sampler_textures(ctx->cso);
   cso_restore_framebuffer(ctx->cso);
   cso_restore_fragment_shader(ctx->cso);
   cso_restore_vertex_shader(ctx->cso);
   cso_restore_viewport(ctx->cso);
}

struct blit_state* util_create_blit	(	struct pipe_context *	pipe,
		struct cso_context *	cso
	)			[read]

Create state object for blit.

Intended to be created once and re-used for many blit() calls.

Definition at line 80 of file u_blit.c.

References pipe_blend_state::alpha_dst_factor, pipe_blend_state::alpha_src_factor, blit_state::blend, pipe_rasterizer_state::bypass_clipping, CALLOC_STRUCT, pipe_blend_state::colormask, blit_state::cso, pipe_rasterizer_state::cull_mode, blit_state::depthstencil, blit_state::frag_shader, pipe_rasterizer_state::front_winding, blit_state::fs, 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, blit_state::pipe, PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ZERO, PIPE_MASK_RGBA, PIPE_TEX_MIPFILTER_NONE, PIPE_TEX_WRAP_CLAMP_TO_EDGE, PIPE_WINDING_CW, PIPE_WINDING_NONE, blit_state::rasterizer, pipe_blend_state::rgb_dst_factor, pipe_blend_state::rgb_src_factor, blit_state::sampler, pipe_viewport_state::scale, semantic_names, TGSI_SEMANTIC_GENERIC, TGSI_SEMANTIC_POSITION, pipe_viewport_state::translate, util_make_fragment_tex_shader(), util_make_vertex_passthrough_shader(), blit_state::vbuf, blit_state::vert_shader, blit_state::vertices, blit_state::viewport, blit_state::vs, pipe_sampler_state::wrap_r, pipe_sampler_state::wrap_s, and pipe_sampler_state::wrap_t.

{
   struct blit_state *ctx;
   uint i;

   ctx = CALLOC_STRUCT(blit_state);
   if (!ctx)
      return NULL;

   ctx->pipe = pipe;
   ctx->cso = cso;

   /* disabled blending/masking */
   memset(&ctx->blend, 0, sizeof(ctx->blend));
   ctx->blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
   ctx->blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
   ctx->blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
   ctx->blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
   ctx->blend.colormask = PIPE_MASK_RGBA;

   /* no-op depth/stencil/alpha */
   memset(&ctx->depthstencil, 0, sizeof(ctx->depthstencil));

   /* rasterizer */
   memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
   ctx->rasterizer.front_winding = PIPE_WINDING_CW;
   ctx->rasterizer.cull_mode = PIPE_WINDING_NONE;
   ctx->rasterizer.bypass_clipping = 1;
   /*ctx->rasterizer.bypass_vs = 1;*/
   ctx->rasterizer.gl_rasterization_rules = 1;

   /* samplers */
   memset(&ctx->sampler, 0, sizeof(ctx->sampler));
   ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
   ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
   ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
   ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
   ctx->sampler.min_img_filter = 0; /* set later */
   ctx->sampler.mag_img_filter = 0; /* set later */
   ctx->sampler.normalized_coords = 1;

   /* viewport (identity, we setup vertices in wincoords) */
   ctx->viewport.scale[0] = 1.0;
   ctx->viewport.scale[1] = 1.0;
   ctx->viewport.scale[2] = 1.0;
   ctx->viewport.scale[3] = 1.0;
   ctx->viewport.translate[0] = 0.0;
   ctx->viewport.translate[1] = 0.0;
   ctx->viewport.translate[2] = 0.0;
   ctx->viewport.translate[3] = 0.0;

   /* vertex shader */
   {
      const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
                                      TGSI_SEMANTIC_GENERIC };
      const uint semantic_indexes[] = { 0, 0 };
      ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
                                                    semantic_indexes,
                                                    &ctx->vert_shader);
   }

   /* fragment shader */
   ctx->fs = util_make_fragment_tex_shader(pipe, &ctx->frag_shader);
   ctx->vbuf = NULL;

   /* init vertex data that doesn't change */
   for (i = 0; i < 4; i++) {
      ctx->vertices[i][0][3] = 1.0f; /* w */
      ctx->vertices[i][1][2] = 0.0f; /* r */
      ctx->vertices[i][1][3] = 1.0f; /* q */
   }

   return ctx;
}

void util_destroy_blit

(

struct blit_state *

ctx

)

Destroy a blit context.

Definition at line 160 of file u_blit.c.

References pipe_context::delete_fs_state, pipe_context::delete_vs_state, blit_state::frag_shader, FREE, blit_state::fs, blit_state::pipe, pipe_buffer_reference(), pipe_context::screen, pipe_shader_state::tokens, blit_state::vbuf, blit_state::vert_shader, and blit_state::vs.

{
   struct pipe_context *pipe = ctx->pipe;

   pipe->delete_vs_state(pipe, ctx->vs);
   pipe->delete_fs_state(pipe, ctx->fs);

   FREE((void*) ctx->vert_shader.tokens);
   FREE((void*) ctx->frag_shader.tokens);

   pipe_buffer_reference(pipe->screen, &ctx->vbuf, NULL);

   FREE(ctx);
}

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