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
  49 struct blit_state
  50 {
  51    struct pipe_context *pipe;
  52
  53    void *blend;
  54    void *depthstencil;
  55    void *rasterizer;
  56    void *samplers[2];  /* one for linear, one for nearest sampling */
  57
  58    /*struct pipe_viewport_state viewport;*/
  59    struct pipe_sampler_state *vs;
  60    struct pipe_sampler_state *fs;
  61 };
  62
  63
  64 /**
  65  * Create state object for blit.
  66  * Intended to be created once and re-used for many blit() calls.
  67  */
  68 struct blit_state *
  69 util_create_blit(struct pipe_context *pipe)
  70 {
  71    struct pipe_blend_state blend;
  72    struct pipe_depth_stencil_alpha_state depthstencil;
  73    struct pipe_rasterizer_state rasterizer;
  74    struct blit_state *ctx;
  75    struct pipe_sampler_state sampler;
  76
  77    ctx = CALLOC_STRUCT(blit_state);
  78    if (!ctx)
  79       return NULL;
  80
  81    ctx->pipe = pipe;
  82
  83    /* we don't use blending, but need to set valid values */
  84    memset(&blend, 0, sizeof(blend));
  85    blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
  86    blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
  87    blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
  88    blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
  89    blend.colormask = PIPE_MASK_RGBA;
  90    ctx->blend = pipe->create_blend_state(pipe, &blend);
  91
  92    /* depth/stencil/alpha */
  93    memset(&depthstencil, 0, sizeof(depthstencil));
  94    ctx->depthstencil = pipe->create_depth_stencil_alpha_state(pipe, &depthstencil);
  95
  96    /* rasterizer */
  97    memset(&rasterizer, 0, sizeof(rasterizer));
  98    rasterizer.front_winding = PIPE_WINDING_CW;
  99    rasterizer.cull_mode = PIPE_WINDING_NONE;
 100    rasterizer.bypass_clipping = 1;  /* bypasses viewport too */
 101    /*rasterizer.bypass_vs = 1;*/
 102    ctx->rasterizer = pipe->create_rasterizer_state(pipe, &rasterizer);
 103
 104    /* samplers */
 105    memset(&sampler, 0, sizeof(sampler));
 106    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 107    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 108    sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 109    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 110    sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 111    sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 112    sampler.normalized_coords = 1;
 113    ctx->samplers[0] = pipe->create_sampler_state(pipe, &sampler);
 114
 115    sampler.min_img_filter = PIPE_TEX_MIPFILTER_LINEAR;
 116    sampler.mag_img_filter = PIPE_TEX_MIPFILTER_LINEAR;
 117    ctx->samplers[1] = pipe->create_sampler_state(pipe, &sampler);
 118
 119
 120 #if 0
 121    /* viewport */
 122    ctx->viewport.scale[0] = 1.0;
 123    ctx->viewport.scale[1] = 1.0;
 124    ctx->viewport.scale[2] = 1.0;
 125    ctx->viewport.scale[3] = 1.0;
 126    ctx->viewport.translate[0] = 0.0;
 127    ctx->viewport.translate[1] = 0.0;
 128    ctx->viewport.translate[2] = 0.0;
 129    ctx->viewport.translate[3] = 0.0;
 130 #endif
 131
 132    /* vertex shader */
 133    {
 134       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 135                                       TGSI_SEMANTIC_GENERIC };
 136       const uint semantic_indexes[] = { 0, 0 };
 137       ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 138                                                     semantic_indexes);
 139    }
 140
 141    /* fragment shader */
 142    ctx->fs = util_make_fragment_tex_shader(pipe);
 143
 144    return ctx;
 145 }
 146
 147
 148 /**
 149  * Destroy a blit context
 150  */
 151 void
 152 util_destroy_blit(struct blit_state *ctx)
 153 {
 154    struct pipe_context *pipe = ctx->pipe;
 155
 156    pipe->delete_blend_state(pipe, ctx->blend);
 157    pipe->delete_depth_stencil_alpha_state(pipe, ctx->depthstencil);
 158    pipe->delete_rasterizer_state(pipe, ctx->rasterizer);
 159    pipe->delete_sampler_state(pipe, ctx->samplers[0]);
 160    pipe->delete_sampler_state(pipe, ctx->samplers[1]);
 161
 162    pipe->delete_vs_state(pipe, ctx->vs);
 163    pipe->delete_fs_state(pipe, ctx->fs);
 164
 165    FREE(ctx);
 166 }
 167
 168
 169 /**
 170  * Copy pixel block from src surface to dst surface.
 171  * Overlapping regions are acceptable.
 172  * XXX need some control over blitting Z and/or stencil.
 173  */
 174 void
 175 util_blit_pixels(struct blit_state *ctx,
 176                  struct pipe_surface *src,
 177                  int srcX0, int srcY0,
 178                  int srcX1, int srcY1,
 179                  struct pipe_surface *dst,
 180                  int dstX0, int dstY0,
 181                  int dstX1, int dstY1,
 182                  float z, uint filter)
 183 {
 184    struct pipe_context *pipe = ctx->pipe;
 185    struct pipe_screen *screen = pipe->screen;
 186    struct pipe_texture texTemp, *tex;
 187    struct pipe_surface *texSurf;
 188    struct pipe_framebuffer_state fb;
 189    const int srcW = abs(srcX1 - srcX0);
 190    const int srcH = abs(srcY1 - srcY0);
 191    const int srcLeft = MIN2(srcX0, srcX1);
 192    const int srcTop = MIN2(srcY0, srcY1);
 193
 194    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 195           filter == PIPE_TEX_MIPFILTER_LINEAR);
 196
 197    if (srcLeft != srcX0) {
 198       /* left-right flip */
 199       int tmp = dstX0;
 200       dstX0 = dstX1;
 201       dstX1 = tmp;
 202    }
 203
 204    if (srcTop != srcY0) {
 205       /* up-down flip */
 206       int tmp = dstY0;
 207       dstY0 = dstY1;
 208       dstY1 = tmp;
 209    }
 210
 211    /*
 212     * XXX for now we're always creating a temporary texture.
 213     * Strictly speaking that's not always needed.
 214     */
 215
 216    /* create temp texture */
 217    memset(&texTemp, 0, sizeof(texTemp));
 218    texTemp.target = PIPE_TEXTURE_2D;
 219    texTemp.format = src->format;
 220    texTemp.last_level = 0;
 221    texTemp.width[0] = srcW;
 222    texTemp.height[0] = srcH;
 223    texTemp.depth[0] = 1;
 224    texTemp.compressed = 0;
 225    texTemp.cpp = pf_get_bits(src->format) / 8;
 226
 227    tex = screen->texture_create(screen, &texTemp);
 228    if (!tex)
 229       return;
 230
 231    texSurf = screen->get_tex_surface(screen, tex, 0, 0, 0);
 232
 233    /* load temp texture */
 234    pipe->surface_copy(pipe, FALSE,
 235                       texSurf, 0, 0,   /* dest */
 236                       src, srcLeft, srcTop, /* src */
 237                       srcW, srcH);     /* size */
 238
 239    /* drawing dest */
 240    memset(&fb, 0, sizeof(fb));
 241    fb.num_cbufs = 1;
 242    fb.cbufs[0] = dst;
 243    pipe->set_framebuffer_state(pipe, &fb);
 244
 245    /* sampler */
 246    if (filter == PIPE_TEX_MIPFILTER_NEAREST)
 247       pipe->bind_sampler_states(pipe, 1, &ctx->samplers[0]);
 248    else
 249       pipe->bind_sampler_states(pipe, 1, &ctx->samplers[1]);
 250
 251    /* texture */
 252    pipe->set_sampler_textures(pipe, 1, &tex);
 253
 254    /* shaders */
 255    pipe->bind_fs_state(pipe, ctx->fs);
 256    pipe->bind_vs_state(pipe, ctx->vs);
 257
 258    /* misc state */
 259    pipe->bind_blend_state(pipe, ctx->blend);
 260    pipe->bind_depth_stencil_alpha_state(pipe, ctx->depthstencil);
 261    pipe->bind_rasterizer_state(pipe, ctx->rasterizer);
 262
 263    /* draw quad */
 264    util_draw_texquad(pipe, dstX0, dstY0, dstX1, dstY1, z);
 265
 266    /* unbind */
 267    pipe->set_sampler_textures(pipe, 0, NULL);
 268    pipe->bind_sampler_states(pipe, 0, NULL);
 269
 270    /* free stuff */
 271    pipe_surface_reference(&texSurf, NULL);
 272    screen->texture_release(screen, &tex);
 273
 274    /* Note: caller must restore pipe/gallium state at this time */
 275 }
 276