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    /*struct pipe_viewport_state viewport;*/
  62    struct pipe_sampler_state *vs;
  63    struct pipe_sampler_state *fs;
  64 };
  65
  66
  67 /**
  68  * Create state object for blit.
  69  * Intended to be created once and re-used for many blit() calls.
  70  */
  71 struct blit_state *
  72 util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
  73 {
  74    struct blit_state *ctx;
  75
  76    ctx = CALLOC_STRUCT(blit_state);
  77    if (!ctx)
  78       return NULL;
  79
  80    ctx->pipe = pipe;
  81    ctx->cso = cso;
  82
  83    /* disabled blending/masking */
  84    memset(&ctx->blend, 0, sizeof(ctx->blend));
  85    ctx->blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
  86    ctx->blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
  87    ctx->blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
  88    ctx->blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
  89    ctx->blend.colormask = PIPE_MASK_RGBA;
  90
  91    /* no-op depth/stencil/alpha */
  92    memset(&ctx->depthstencil, 0, sizeof(ctx->depthstencil));
  93
  94    /* rasterizer */
  95    memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
  96    ctx->rasterizer.front_winding = PIPE_WINDING_CW;
  97    ctx->rasterizer.cull_mode = PIPE_WINDING_NONE;
  98    ctx->rasterizer.bypass_clipping = 1;  /* bypasses viewport too */
  99    /*ctx->rasterizer.bypass_vs = 1;*/
 100
 101    /* samplers */
 102    memset(&ctx->sampler, 0, sizeof(ctx->sampler));
 103    ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 104    ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 105    ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 106    ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 107    ctx->sampler.min_img_filter = 0; /* set later */
 108    ctx->sampler.mag_img_filter = 0; /* set later */
 109    ctx->sampler.normalized_coords = 1;
 110
 111 #if 0
 112    /* viewport */
 113    ctx->viewport.scale[0] = 1.0;
 114    ctx->viewport.scale[1] = 1.0;
 115    ctx->viewport.scale[2] = 1.0;
 116    ctx->viewport.scale[3] = 1.0;
 117    ctx->viewport.translate[0] = 0.0;
 118    ctx->viewport.translate[1] = 0.0;
 119    ctx->viewport.translate[2] = 0.0;
 120    ctx->viewport.translate[3] = 0.0;
 121 #endif
 122
 123    /* vertex shader */
 124    {
 125       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 126                                       TGSI_SEMANTIC_GENERIC };
 127       const uint semantic_indexes[] = { 0, 0 };
 128       ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 129                                                     semantic_indexes);
 130    }
 131
 132    /* fragment shader */
 133    ctx->fs = util_make_fragment_tex_shader(pipe);
 134
 135    return ctx;
 136 }
 137
 138
 139 /**
 140  * Destroy a blit context
 141  */
 142 void
 143 util_destroy_blit(struct blit_state *ctx)
 144 {
 145    struct pipe_context *pipe = ctx->pipe;
 146
 147    pipe->delete_vs_state(pipe, ctx->vs);
 148    pipe->delete_fs_state(pipe, ctx->fs);
 149
 150    FREE(ctx);
 151 }
 152
 153
 154 /**
 155  * Copy pixel block from src surface to dst surface.
 156  * Overlapping regions are acceptable.
 157  * XXX need some control over blitting Z and/or stencil.
 158  */
 159 void
 160 util_blit_pixels(struct blit_state *ctx,
 161                  struct pipe_surface *src,
 162                  int srcX0, int srcY0,
 163                  int srcX1, int srcY1,
 164                  struct pipe_surface *dst,
 165                  int dstX0, int dstY0,
 166                  int dstX1, int dstY1,
 167                  float z, uint filter)
 168 {
 169    struct pipe_context *pipe = ctx->pipe;
 170    struct pipe_screen *screen = pipe->screen;
 171    struct pipe_texture texTemp, *tex;
 172    struct pipe_surface *texSurf;
 173    struct pipe_framebuffer_state fb;
 174    const int srcW = abs(srcX1 - srcX0);
 175    const int srcH = abs(srcY1 - srcY0);
 176    const int srcLeft = MIN2(srcX0, srcX1);
 177    const int srcTop = MIN2(srcY0, srcY1);
 178
 179    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 180           filter == PIPE_TEX_MIPFILTER_LINEAR);
 181
 182    if (srcLeft != srcX0) {
 183       /* left-right flip */
 184       int tmp = dstX0;
 185       dstX0 = dstX1;
 186       dstX1 = tmp;
 187    }
 188
 189    if (srcTop != srcY0) {
 190       /* up-down flip */
 191       int tmp = dstY0;
 192       dstY0 = dstY1;
 193       dstY1 = tmp;
 194    }
 195
 196    /*
 197     * XXX for now we're always creating a temporary texture.
 198     * Strictly speaking that's not always needed.
 199     */
 200
 201    /* create temp texture */
 202    memset(&texTemp, 0, sizeof(texTemp));
 203    texTemp.target = PIPE_TEXTURE_2D;
 204    texTemp.format = src->format;
 205    texTemp.last_level = 0;
 206    texTemp.width[0] = srcW;
 207    texTemp.height[0] = srcH;
 208    texTemp.depth[0] = 1;
 209    texTemp.compressed = 0;
 210    texTemp.cpp = pf_get_bits(src->format) / 8;
 211
 212    tex = screen->texture_create(screen, &texTemp);
 213    if (!tex)
 214       return;
 215
 216    texSurf = screen->get_tex_surface(screen, tex, 0, 0, 0);
 217
 218    /* load temp texture */
 219    pipe->surface_copy(pipe, FALSE,
 220                       texSurf, 0, 0,   /* dest */
 221                       src, srcLeft, srcTop, /* src */
 222                       srcW, srcH);     /* size */
 223
 224    /* save state (restored below) */
 225    cso_save_blend(ctx->cso);
 226    cso_save_depth_stencil_alpha(ctx->cso);
 227    cso_save_rasterizer(ctx->cso);
 228    cso_save_samplers(ctx->cso);
 229    cso_save_sampler_textures(ctx->cso);
 230    cso_save_framebuffer(ctx->cso);
 231
 232    /* set misc state we care about */
 233    cso_set_blend(ctx->cso, &ctx->blend);
 234    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
 235    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 236
 237    /* sampler */
 238    ctx->sampler.min_img_filter = filter;
 239    ctx->sampler.mag_img_filter = filter;
 240    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 241    cso_single_sampler_done(ctx->cso);
 242
 243    /* texture */
 244    pipe->set_sampler_textures(pipe, 1, &tex);
 245
 246    /* shaders */
 247    pipe->bind_fs_state(pipe, ctx->fs);
 248    pipe->bind_vs_state(pipe, ctx->vs);
 249
 250    /* drawing dest */
 251    memset(&fb, 0, sizeof(fb));
 252    fb.num_cbufs = 1;
 253    fb.cbufs[0] = dst;
 254    cso_set_framebuffer(ctx->cso, &fb);
 255
 256    /* draw quad */
 257    util_draw_texquad(pipe,
 258                      (float)dstX0,
 259                      (float)dstY0,
 260                      (float)dstX1,
 261                      (float)dstY1, z);
 262
 263    /* restore state we changed */
 264    cso_restore_blend(ctx->cso);
 265    cso_restore_depth_stencil_alpha(ctx->cso);
 266    cso_restore_rasterizer(ctx->cso);
 267    cso_restore_samplers(ctx->cso);
 268    cso_restore_sampler_textures(ctx->cso);
 269    cso_restore_framebuffer(ctx->cso);
 270
 271    /* free the texture */
 272    pipe_surface_reference(&texSurf, NULL);
 273    screen->texture_release(screen, &tex);
 274 }
 275