src/mesa/drivers/dri/i965/intel_pixel_draw.c

   1 /*
   2  * Copyright 2006 VMware, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portionsalloc
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "main/glheader.h"
  27 #include "main/enums.h"
  28 #include "main/image.h"
  29 #include "main/glformats.h"
  30 #include "main/mtypes.h"
  31 #include "main/condrender.h"
  32 #include "main/fbobject.h"
  33 #include "main/teximage.h"
  34 #include "main/texobj.h"
  35 #include "main/texstate.h"
  36 #include "main/bufferobj.h"
  37 #include "swrast/swrast.h"
  38 #include "drivers/common/meta.h"
  39
  40 #include "brw_context.h"
  41 #include "intel_screen.h"
  42 #include "intel_blit.h"
  43 #include "intel_buffers.h"
  44 #include "intel_fbo.h"
  45 #include "intel_mipmap_tree.h"
  46 #include "intel_pixel.h"
  47 #include "intel_buffer_objects.h"
  48
  49 #define FILE_DEBUG_FLAG DEBUG_PIXEL
  50
  51 static bool
  52 do_blit_drawpixels(struct gl_context * ctx,
  53                    GLint x, GLint y, GLsizei width, GLsizei height,
  54                    GLenum format, GLenum type,
  55                    const struct gl_pixelstore_attrib *unpack,
  56                    const GLvoid * pixels)
  57 {
  58    struct brw_context *brw = brw_context(ctx);
  59    struct intel_buffer_object *src = intel_buffer_object(unpack->BufferObj);
  60    GLuint src_offset;
  61    drm_intel_bo *src_buffer;
  62
  63    DBG("%s\n", __func__);
  64
  65    if (!intel_check_blit_fragment_ops(ctx, false))
  66       return false;
  67
  68    if (ctx->DrawBuffer->_NumColorDrawBuffers != 1) {
  69       DBG("%s: fallback due to MRT\n", __func__);
  70       return false;
  71    }
  72
  73    intel_prepare_render(brw);
  74
  75    struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
  76    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  77
  78    mesa_format src_format = _mesa_format_from_format_and_type(format, type);
  79    if (_mesa_format_is_mesa_array_format(src_format))
  80       src_format = _mesa_format_from_array_format(src_format);
  81    mesa_format dst_format = irb->mt->format;
  82
  83    /* We can safely discard sRGB encode/decode for the DrawPixels interface */
  84    src_format = _mesa_get_srgb_format_linear(src_format);
  85    dst_format = _mesa_get_srgb_format_linear(dst_format);
  86
  87    if (!intel_miptree_blit_compatible_formats(src_format, dst_format)) {
  88       DBG("%s: bad format for blit\n", __func__);
  89       return false;
  90    }
  91
  92    if (unpack->SwapBytes || unpack->LsbFirst ||
  93        unpack->SkipPixels || unpack->SkipRows) {
  94       DBG("%s: bad packing params\n", __func__);
  95       return false;
  96    }
  97
  98    int src_stride = _mesa_image_row_stride(unpack, width, format, type);
  99    bool src_flip = false;
 100    /* Mesa flips the src_stride for unpack->Invert, but we want our mt to have
 101     * a normal src_stride.
 102     */
 103    if (unpack->Invert) {
 104       src_stride = -src_stride;
 105       src_flip = true;
 106    }
 107
 108    src_offset = (GLintptr)pixels;
 109    src_offset += _mesa_image_offset(2, unpack, width, height,
 110                                     format, type, 0, 0, 0);
 111
 112    src_buffer = intel_bufferobj_buffer(brw, src, src_offset,
 113                                        height * src_stride);
 114
 115    struct intel_mipmap_tree *pbo_mt =
 116       intel_miptree_create_for_bo(brw,
 117                                   src_buffer,
 118                                   irb->mt->format,
 119                                   src_offset,
 120                                   width, height, 1,
 121                                   src_stride,
 122                                   0);
 123    if (!pbo_mt)
 124       return false;
 125
 126    if (!intel_miptree_blit(brw,
 127                            pbo_mt, 0, 0,
 128                            0, 0, src_flip,
 129                            irb->mt, irb->mt_level, irb->mt_layer,
 130                            x, y, _mesa_is_winsys_fbo(ctx->DrawBuffer),
 131                            width, height, GL_COPY)) {
 132       DBG("%s: blit failed\n", __func__);
 133       intel_miptree_release(&pbo_mt);
 134       return false;
 135    }
 136
 137    intel_miptree_release(&pbo_mt);
 138
 139    if (ctx->Query.CurrentOcclusionObject)
 140       ctx->Query.CurrentOcclusionObject->Result += width * height;
 141
 142    DBG("%s: success\n", __func__);
 143    return true;
 144 }
 145
 146 void
 147 intelDrawPixels(struct gl_context * ctx,
 148                 GLint x, GLint y,
 149                 GLsizei width, GLsizei height,
 150                 GLenum format,
 151                 GLenum type,
 152                 const struct gl_pixelstore_attrib *unpack,
 153                 const GLvoid * pixels)
 154 {
 155    struct brw_context *brw = brw_context(ctx);
 156
 157    if (!_mesa_check_conditional_render(ctx))
 158       return;
 159
 160    if (format == GL_STENCIL_INDEX) {
 161       _swrast_DrawPixels(ctx, x, y, width, height, format, type,
 162                          unpack, pixels);
 163       return;
 164    }
 165
 166    if (_mesa_is_bufferobj(unpack->BufferObj)) {
 167       if (do_blit_drawpixels(ctx, x, y, width, height, format, type, unpack,
 168                              pixels)) {
 169          return;
 170       }
 171
 172       perf_debug("%s: fallback to generic code in PBO case\n", __func__);
 173    }
 174
 175    _mesa_meta_DrawPixels(ctx, x, y, width, height, format, type,
 176                          unpack, pixels);
 177 }