src/gallium/auxiliary/util/u_blit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 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 /**
  29  * @file
  30  * Copy/blit pixel rect between surfaces
  31  *
  32  * @author Brian Paul
  33  */
  34
  35
  36 #include "pipe/p_context.h"
  37 #include "pipe/p_debug.h"
  38 #include "pipe/p_defines.h"
  39 #include "pipe/p_inlines.h"
  40 #include "pipe/p_util.h"
  41 #include "pipe/p_winsys.h"
  42 #include "pipe/p_shader_tokens.h"
  43
  44 #include "util/u_draw_quad.h"
  45 #include "util/u_blit.h"
  46 #include "util/u_simple_shaders.h"
  47
  48 #include "cso_cache/cso_context.h"
  49
  50
  51 struct blit_state
  52 {
  53    struct pipe_context *pipe;
  54    struct cso_context *cso;
  55
  56    struct pipe_blend_state blend;
  57    struct pipe_depth_stencil_alpha_state depthstencil;
  58    struct pipe_rasterizer_state rasterizer;
  59    struct pipe_sampler_state sampler;
  60
  61    void *vs;
  62    void *fs;
  63
  64    struct pipe_buffer *vbuf;  /**< quad vertices */
  65    float vertices[4][2][4];   /**< vertex/texcoords for quad */
  66 };
  67
  68
  69 /**
  70  * Create state object for blit.
  71  * Intended to be created once and re-used for many blit() calls.
  72  */
  73 struct blit_state *
  74 util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
  75 {
  76    struct blit_state *ctx;
  77    uint i;
  78
  79    ctx = CALLOC_STRUCT(blit_state);
  80    if (!ctx)
  81       return NULL;
  82
  83    ctx->pipe = pipe;
  84    ctx->cso = cso;
  85
  86    /* disabled blending/masking */
  87    memset(&ctx->blend, 0, sizeof(ctx->blend));
  88    ctx->blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
  89    ctx->blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
  90    ctx->blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
  91    ctx->blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
  92    ctx->blend.colormask = PIPE_MASK_RGBA;
  93
  94    /* no-op depth/stencil/alpha */
  95    memset(&ctx->depthstencil, 0, sizeof(ctx->depthstencil));
  96
  97    /* rasterizer */
  98    memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
  99    ctx->rasterizer.front_winding = PIPE_WINDING_CW;
 100    ctx->rasterizer.cull_mode = PIPE_WINDING_NONE;
 101    ctx->rasterizer.bypass_clipping = 1;  /* bypasses viewport too */
 102    /*ctx->rasterizer.bypass_vs = 1;*/
 103
 104    /* samplers */
 105    memset(&ctx->sampler, 0, sizeof(ctx->sampler));
 106    ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 107    ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 108    ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 109    ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 110    ctx->sampler.min_img_filter = 0; /* set later */
 111    ctx->sampler.mag_img_filter = 0; /* set later */
 112    ctx->sampler.normalized_coords = 1;
 113
 114 #if 0
 115    /* viewport */
 116    ctx->viewport.scale[0] = 1.0;
 117    ctx->viewport.scale[1] = 1.0;
 118    ctx->viewport.scale[2] = 1.0;
 119    ctx->viewport.scale[3] = 1.0;
 120    ctx->viewport.translate[0] = 0.0;
 121    ctx->viewport.translate[1] = 0.0;
 122    ctx->viewport.translate[2] = 0.0;
 123    ctx->viewport.translate[3] = 0.0;
 124 #endif
 125
 126    /* vertex shader */
 127    {
 128       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 129                                       TGSI_SEMANTIC_GENERIC };
 130       const uint semantic_indexes[] = { 0, 0 };
 131       ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 132                                                     semantic_indexes);
 133    }
 134
 135    /* fragment shader */
 136    ctx->fs = util_make_fragment_tex_shader(pipe);
 137
 138    ctx->vbuf = pipe->winsys->buffer_create(pipe->winsys,
 139                                            32,
 140                                            PIPE_BUFFER_USAGE_VERTEX,
 141                                            sizeof(ctx->vertices));
 142    if (!ctx->vbuf) {
 143       FREE(ctx);
 144       ctx->pipe->delete_fs_state(ctx->pipe, ctx->fs);
 145       ctx->pipe->delete_vs_state(ctx->pipe, ctx->vs);
 146       return NULL;
 147    }
 148
 149    /* init vertex data that doesn't change */
 150    for (i = 0; i < 4; i++) {
 151       ctx->vertices[i][0][3] = 1.0f; /* w */
 152       ctx->vertices[i][1][2] = 0.0f; /* r */
 153       ctx->vertices[i][1][3] = 1.0f; /* q */
 154    }
 155
 156    return ctx;
 157 }
 158
 159
 160 /**
 161  * Destroy a blit context
 162  */
 163 void
 164 util_destroy_blit(struct blit_state *ctx)
 165 {
 166    struct pipe_context *pipe = ctx->pipe;
 167
 168    pipe->delete_vs_state(pipe, ctx->vs);
 169    pipe->delete_fs_state(pipe, ctx->fs);
 170
 171    pipe->winsys->buffer_destroy(pipe->winsys, ctx->vbuf);
 172
 173    FREE(ctx);
 174 }
 175
 176
 177 /**
 178  * Setup vertex data for the textured quad we'll draw.
 179  * Note: y=0=top
 180  */
 181 static void
 182 setup_vertex_data(struct blit_state *ctx,
 183                   float x0, float y0, float x1, float y1, float z)
 184 {
 185    void *buf;
 186
 187    ctx->vertices[0][0][0] = x0;
 188    ctx->vertices[0][0][1] = y0;
 189    ctx->vertices[0][0][2] = z;
 190    ctx->vertices[0][1][0] = 0.0f; /*s*/
 191    ctx->vertices[0][1][1] = 0.0f; /*t*/
 192
 193    ctx->vertices[1][0][0] = x1;
 194    ctx->vertices[1][0][1] = y0;
 195    ctx->vertices[1][0][2] = z;
 196    ctx->vertices[1][1][0] = 1.0f; /*s*/
 197    ctx->vertices[1][1][1] = 0.0f; /*t*/
 198
 199    ctx->vertices[2][0][0] = x1;
 200    ctx->vertices[2][0][1] = y1;
 201    ctx->vertices[2][0][2] = z;
 202    ctx->vertices[2][1][0] = 1.0f;
 203    ctx->vertices[2][1][1] = 1.0f;
 204
 205    ctx->vertices[3][0][0] = x0;
 206    ctx->vertices[3][0][1] = y1;
 207    ctx->vertices[3][0][2] = z;
 208    ctx->vertices[3][1][0] = 0.0f;
 209    ctx->vertices[3][1][1] = 1.0f;
 210
 211    buf = ctx->pipe->winsys->buffer_map(ctx->pipe->winsys, ctx->vbuf,
 212                                        PIPE_BUFFER_USAGE_CPU_WRITE);
 213
 214    memcpy(buf, ctx->vertices, sizeof(ctx->vertices));
 215
 216    ctx->pipe->winsys->buffer_unmap(ctx->pipe->winsys, ctx->vbuf);
 217 }
 218
 219
 220 /**
 221  * Copy pixel block from src surface to dst surface.
 222  * Overlapping regions are acceptable.
 223  * XXX need some control over blitting Z and/or stencil.
 224  */
 225 void
 226 util_blit_pixels(struct blit_state *ctx,
 227                  struct pipe_surface *src,
 228                  int srcX0, int srcY0,
 229                  int srcX1, int srcY1,
 230                  struct pipe_surface *dst,
 231                  int dstX0, int dstY0,
 232                  int dstX1, int dstY1,
 233                  float z, uint filter)
 234 {
 235    struct pipe_context *pipe = ctx->pipe;
 236    struct pipe_screen *screen = pipe->screen;
 237    struct pipe_texture texTemp, *tex;
 238    struct pipe_surface *texSurf;
 239    struct pipe_framebuffer_state fb;
 240    const int srcW = abs(srcX1 - srcX0);
 241    const int srcH = abs(srcY1 - srcY0);
 242    const int srcLeft = MIN2(srcX0, srcX1);
 243    const int srcTop = MIN2(srcY0, srcY1);
 244
 245    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 246           filter == PIPE_TEX_MIPFILTER_LINEAR);
 247
 248    if (srcLeft != srcX0) {
 249       /* left-right flip */
 250       int tmp = dstX0;
 251       dstX0 = dstX1;
 252       dstX1 = tmp;
 253    }
 254
 255    if (srcTop != srcY0) {
 256       /* up-down flip */
 257       int tmp = dstY0;
 258       dstY0 = dstY1;
 259       dstY1 = tmp;
 260    }
 261
 262    /*
 263     * XXX for now we're always creating a temporary texture.
 264     * Strictly speaking that's not always needed.
 265     */
 266
 267    /* create temp texture */
 268    memset(&texTemp, 0, sizeof(texTemp));
 269    texTemp.target = PIPE_TEXTURE_2D;
 270    texTemp.format = src->format;
 271    texTemp.last_level = 0;
 272    texTemp.width[0] = srcW;
 273    texTemp.height[0] = srcH;
 274    texTemp.depth[0] = 1;
 275    texTemp.compressed = 0;
 276    texTemp.cpp = pf_get_bits(src->format) / 8;
 277
 278    tex = screen->texture_create(screen, &texTemp);
 279    if (!tex)
 280       return;
 281
 282    texSurf = screen->get_tex_surface(screen, tex, 0, 0, 0);
 283
 284    /* load temp texture */
 285    pipe->surface_copy(pipe, FALSE,
 286                       texSurf, 0, 0,   /* dest */
 287                       src, srcLeft, srcTop, /* src */
 288                       srcW, srcH);     /* size */
 289
 290    /* save state (restored below) */
 291    cso_save_blend(ctx->cso);
 292    cso_save_depth_stencil_alpha(ctx->cso);
 293    cso_save_rasterizer(ctx->cso);
 294    cso_save_samplers(ctx->cso);
 295    cso_save_sampler_textures(ctx->cso);
 296    cso_save_framebuffer(ctx->cso);
 297
 298    /* set misc state we care about */
 299    cso_set_blend(ctx->cso, &ctx->blend);
 300    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
 301    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 302
 303    /* sampler */
 304    ctx->sampler.min_img_filter = filter;
 305    ctx->sampler.mag_img_filter = filter;
 306    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 307    cso_single_sampler_done(ctx->cso);
 308
 309    /* texture */
 310    pipe->set_sampler_textures(pipe, 1, &tex);
 311
 312    /* shaders */
 313    pipe->bind_fs_state(pipe, ctx->fs);
 314    pipe->bind_vs_state(pipe, ctx->vs);
 315
 316    /* drawing dest */
 317    memset(&fb, 0, sizeof(fb));
 318    fb.width = dst->width;
 319    fb.height = dst->height;
 320    fb.num_cbufs = 1;
 321    fb.cbufs[0] = dst;
 322    cso_set_framebuffer(ctx->cso, &fb);
 323
 324    /* draw quad */
 325    setup_vertex_data(ctx,
 326                      (float) dstX0, (float) dstY0,
 327                      (float) dstX1, (float) dstY1, z);
 328
 329    util_draw_vertex_buffer(ctx->pipe, ctx->vbuf,
 330                            PIPE_PRIM_TRIANGLE_FAN,
 331                            4,  /* verts */
 332                            2); /* attribs/vert */
 333
 334    /* restore state we changed */
 335    cso_restore_blend(ctx->cso);
 336    cso_restore_depth_stencil_alpha(ctx->cso);
 337    cso_restore_rasterizer(ctx->cso);
 338    cso_restore_samplers(ctx->cso);
 339    cso_restore_sampler_textures(ctx->cso);
 340    cso_restore_framebuffer(ctx->cso);
 341
 342    /* free the texture */
 343    pipe_surface_reference(&texSurf, NULL);
 344    screen->texture_release(screen, &tex);
 345 }
 346