glamor_render.c 39.5 KB
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/*
 * Copyright © 2009 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

/** @file glamor_render.c
 *
 * Render acceleration implementation
 */

#include "glamor_priv.h"

#ifdef RENDER
#include "mipict.h"
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#include "fbpict.h"
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#include "glu3/glu3.h"

struct shader_key {
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  enum shader_source source;
  enum shader_mask mask;
  enum shader_in in;
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};

struct blendinfo {
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  Bool dest_alpha;
  Bool source_alpha;
  GLenum source_blend;
  GLenum dest_blend;
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};

static struct blendinfo composite_op_info[] = {
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  [PictOpClear] =       {0, 0, GL_ZERO,                GL_ZERO},
  [PictOpSrc] =         {0, 0, GL_ONE,                 GL_ZERO},
  [PictOpDst] =         {0, 0, GL_ZERO,                GL_ONE},
  [PictOpOver] =        {0, 1, GL_ONE,                 GL_ONE_MINUS_SRC_ALPHA},
  [PictOpOverReverse] = {1, 0, GL_ONE_MINUS_DST_ALPHA, GL_ONE},
  [PictOpIn] =          {1, 0, GL_DST_ALPHA,           GL_ZERO},
  [PictOpInReverse] =   {0, 1, GL_ZERO,                GL_SRC_ALPHA},
  [PictOpOut] =         {1, 0, GL_ONE_MINUS_DST_ALPHA, GL_ZERO},
  [PictOpOutReverse] =  {0, 1, GL_ZERO,                GL_ONE_MINUS_SRC_ALPHA},
  [PictOpAtop] =        {1, 1, GL_DST_ALPHA,           GL_ONE_MINUS_SRC_ALPHA},
  [PictOpAtopReverse] = {1, 1, GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA},
  [PictOpXor] =         {1, 1, GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA},
  [PictOpAdd] =         {0, 0, GL_ONE,                 GL_ONE},
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};

static GLuint
glamor_create_composite_fs(struct shader_key *key)
{
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  const char *source_solid_fetch =
    "uniform vec4 source;\n"
    "vec4 get_source()\n"
    "{\n"
    "	return source;\n"
    "}\n";
  const char *source_alpha_pixmap_fetch =
    "uniform sampler2D source_sampler;\n"
    "vec4 get_source()\n"
    "{\n"
    "	return texture2D(source_sampler, gl_TexCoord[0].xy);\n"
    "}\n";
  const char *source_pixmap_fetch =
    "uniform sampler2D source_sampler;\n"
    "vec4 get_source()\n"
    "{\n"
    "       return vec4(texture2D(source_sampler, gl_TexCoord[0].xy).rgb, 1);\n"
    "}\n";
  const char *mask_solid_fetch =
    "uniform vec4 mask;\n"
    "vec4 get_mask()\n"
    "{\n"
    "	return mask;\n"
    "}\n";
  const char *mask_alpha_pixmap_fetch =
    "uniform sampler2D mask_sampler;\n"
    "vec4 get_mask()\n"
    "{\n"
    "	return texture2D(mask_sampler, gl_TexCoord[1].xy);\n"
    "}\n";
  const char *mask_pixmap_fetch =
    "uniform sampler2D mask_sampler;\n"
    "vec4 get_mask()\n"
    "{\n"
    "       return vec4(texture2D(mask_sampler, gl_TexCoord[1].xy).rgb, 1);\n"
    "}\n";
  const char *in_source_only =
    "void main()\n"
    "{\n"
    "	gl_FragColor = get_source();\n"
    "}\n";
  const char *in_normal =
    "void main()\n"
    "{\n"
    "	gl_FragColor = get_source() * get_mask().a;\n"
    "}\n";
  const char *in_ca_source =
    "void main()\n"
    "{\n"
    "	gl_FragColor = get_source() * get_mask();\n"
    "}\n";
  const char *in_ca_alpha =
    "void main()\n"
    "{\n"
    "	gl_FragColor = get_source().a * get_mask();\n"
    "}\n";
  char *source;
  const char *source_fetch;
  const char *mask_fetch = "";
  const char *in;
  GLuint prog;

  switch (key->source) {
  case SHADER_SOURCE_SOLID:
    source_fetch = source_solid_fetch;
    break;
  case SHADER_SOURCE_TEXTURE_ALPHA:
    source_fetch = source_alpha_pixmap_fetch;
    break;
  case SHADER_SOURCE_TEXTURE:
    source_fetch = source_pixmap_fetch;
    break;
  default:
    FatalError("Bad composite shader source");
  }

  switch (key->mask) {
  case SHADER_MASK_NONE:
    break;
  case SHADER_MASK_SOLID:
    mask_fetch = mask_solid_fetch;
    break;
  case SHADER_MASK_TEXTURE_ALPHA:
    mask_fetch = mask_alpha_pixmap_fetch;
    break;
  case SHADER_MASK_TEXTURE:
    mask_fetch = mask_pixmap_fetch;
    break;
  default:
    FatalError("Bad composite shader mask");
  }

  switch (key->in) {
  case SHADER_IN_SOURCE_ONLY:
    in = in_source_only;
    break;
  case SHADER_IN_NORMAL:
    in = in_normal;
    break;
  case SHADER_IN_CA_SOURCE:
    in = in_ca_source;
    break;
  case SHADER_IN_CA_ALPHA:
    in = in_ca_alpha;
    break;
  default:
    FatalError("Bad composite IN type");
  }

  XNFasprintf(&source,
	      "%s%s%s",
	      source_fetch,
	      mask_fetch,
	      in);
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  prog = glamor_compile_glsl_prog(GL_FRAGMENT_SHADER, source);
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  free(source);
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  return prog;
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}

static GLuint
glamor_create_composite_vs(struct shader_key *key)
{
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  const char *main_opening =
    "void main()\n"
    "{\n"
    "	gl_Position = gl_Vertex;\n";
  const char *source_coords =
    "	gl_TexCoord[0] = gl_MultiTexCoord0;\n";
  const char *mask_coords =
    "	gl_TexCoord[1] = gl_MultiTexCoord1;\n";
  const char *main_closing =
    "}\n";
  const char *source_coords_setup = "";
  const char *mask_coords_setup = "";
  char *source;
  GLuint prog;

  if (key->source != SHADER_SOURCE_SOLID)
    source_coords_setup = source_coords;

  if (key->mask != SHADER_MASK_NONE && key->mask != SHADER_MASK_SOLID)
    mask_coords_setup = mask_coords;

  XNFasprintf(&source,
	      "%s%s%s%s",
	      main_opening,
	      source_coords_setup,
	      mask_coords_setup,
	      main_closing);

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  prog = glamor_compile_glsl_prog(GL_VERTEX_SHADER, source);
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  free(source);

  return prog;
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}

static void
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glamor_create_composite_shader(ScreenPtr screen, struct shader_key *key,
			       glamor_composite_shader *shader)
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{
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  GLuint vs, fs, prog;
  GLint source_sampler_uniform_location, mask_sampler_uniform_location;

  vs = glamor_create_composite_vs(key);
  if (vs == 0)
    return;
  fs = glamor_create_composite_fs(key);
  if (fs == 0)
    return;

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  prog = glCreateProgram();
  glAttachShader(prog, vs);
  glAttachShader(prog, fs);
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  glamor_link_glsl_prog(prog);

  shader->prog = prog;

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  glUseProgram(prog);
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  if (key->source == SHADER_SOURCE_SOLID) {
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    shader->source_uniform_location = glGetUniformLocation(prog,
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							      "source");
  } else {
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    source_sampler_uniform_location = glGetUniformLocation(prog,
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							      "source_sampler");
    glUniform1i(source_sampler_uniform_location, 0);
  }

  if (key->mask != SHADER_MASK_NONE) {
    if (key->mask == SHADER_MASK_SOLID) {
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      shader->mask_uniform_location = glGetUniformLocation(prog,
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							      "mask");
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    } else {
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      mask_sampler_uniform_location = glGetUniformLocation(prog,
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							      "mask_sampler");
      glUniform1i(mask_sampler_uniform_location, 1);
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    }
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  }
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}

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static glamor_composite_shader *
glamor_lookup_composite_shader(ScreenPtr screen, struct shader_key *key)
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{
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  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
  glamor_composite_shader *shader;
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  shader = &glamor_priv->composite_shader[key->source][key->mask][key->in];
  if (shader->prog == 0)
    glamor_create_composite_shader(screen, key, shader);
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  return shader;
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}
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#define GLAMOR_COMPOSITE_VBO_SIZE 8192

static void
glamor_reset_composite_vbo(ScreenPtr screen)
{
  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
  glamor_priv->vbo_offset = 0;
  glamor_priv->vbo_size = GLAMOR_COMPOSITE_VBO_SIZE;
  glamor_priv->render_nr_verts = 0;
}

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void
glamor_init_composite_shaders(ScreenPtr screen)
{
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  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
  glamor_priv->vb = malloc(GLAMOR_COMPOSITE_VBO_SIZE);
  assert(glamor_priv->vb != NULL);
  glamor_reset_composite_vbo(screen);
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}

static Bool
glamor_set_composite_op(ScreenPtr screen,
			CARD8 op, PicturePtr dest, PicturePtr mask)
{
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  GLenum source_blend, dest_blend;
  struct blendinfo *op_info;

  if (op >= ARRAY_SIZE(composite_op_info)) {
    glamor_fallback("unsupported render op %d \n", op);
    return GL_FALSE;
  }
  op_info = &composite_op_info[op];

  source_blend = op_info->source_blend;
  dest_blend = op_info->dest_blend;

  /* If there's no dst alpha channel, adjust the blend op so that we'll treat
   * it as always 1.
   */
  if (PICT_FORMAT_A(dest->format) == 0 && op_info->dest_alpha) {
    if (source_blend == GL_DST_ALPHA)
      source_blend = GL_ONE;
    else if (source_blend == GL_ONE_MINUS_DST_ALPHA)
      source_blend = GL_ZERO;
  }

  /* Set up the source alpha value for blending in component alpha mode. */
  if (mask && mask->componentAlpha && PICT_FORMAT_RGB(mask->format) != 0 &&
      op_info->source_alpha) {
    if (source_blend != GL_ZERO) {
      glamor_fallback("Dual-source composite blending not supported\n");
      return GL_FALSE;
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    }
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    if (dest_blend == GL_SRC_ALPHA)
      dest_blend = GL_SRC_COLOR;
    else if (dest_blend == GL_ONE_MINUS_SRC_ALPHA)
      dest_blend = GL_ONE_MINUS_SRC_COLOR;
  }
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  if (source_blend == GL_ONE && dest_blend == GL_ZERO) {
    glDisable(GL_BLEND);
  } else {
    glEnable(GL_BLEND);
    glBlendFunc(source_blend, dest_blend);
  }
  return TRUE;
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}

static void
glamor_set_composite_texture(ScreenPtr screen, int unit, PicturePtr picture,
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			     glamor_pixmap_private *pixmap_priv)
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{
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  glActiveTexture(GL_TEXTURE0 + unit);
  glBindTexture(GL_TEXTURE_2D, pixmap_priv->tex);
  switch (picture->repeatType) {
  case RepeatNone:
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    break;
  case RepeatNormal:
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    break;
  case RepeatPad:
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    break;
  case RepeatReflect:
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
    break;
  }

  switch (picture->filter) {
  case PictFilterNearest:
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    break;
  case PictFilterBilinear:
  default:
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    break;
  }

  glEnable(GL_TEXTURE_2D);
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}

static void
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glamor_set_composite_solid(float *color, GLint uniform_location)
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{
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  glUniform4fv(uniform_location, 1, color);
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}

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static int
compatible_formats (CARD8 op, PicturePtr dst, PicturePtr src)
{
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  if (op == PictOpSrc) {
    if (src->format == dst->format)
      return 1;
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    if (src->format == PICT_a8r8g8b8 && dst->format == PICT_x8r8g8b8)
      return 1;
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    if (src->format == PICT_a8b8g8r8 && dst->format == PICT_x8b8g8r8)
      return 1;
  } else if (op == PictOpOver) {
    if (src->alphaMap || dst->alphaMap)
      return 0;
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    if (src->format != dst->format)
      return 0;
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    if (src->format == PICT_x8r8g8b8 || src->format == PICT_x8b8g8r8)
      return 1;
  }
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  return 0;
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}

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static char
glamor_get_picture_location(PicturePtr picture)
{
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  if (picture == NULL)
    return ' ';

  if (picture->pDrawable == NULL) {
    switch (picture->pSourcePict->type) {
    case SourcePictTypeSolidFill:
      return 'c';
    case SourcePictTypeLinear:
      return 'l';
    case SourcePictTypeRadial:
      return 'r';
    default:
      return '?';
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    }
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  }
  return glamor_get_drawable_location(picture->pDrawable);
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}

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static Bool
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glamor_composite_with_copy(CARD8 op,
			   PicturePtr source,
			   PicturePtr dest,
			   INT16 x_source,
			   INT16 y_source,
			   INT16 x_dest,
			   INT16 y_dest,
			   CARD16 width,
			   CARD16 height)
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{
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  RegionRec region;
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  if (!source->pDrawable)
    return FALSE;
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  if (!compatible_formats(op, dest, source))
    return FALSE;
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  if (source->repeat || source->transform)
    return FALSE;
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  x_dest += dest->pDrawable->x;
  y_dest += dest->pDrawable->y;
  x_source += source->pDrawable->x;
  y_source += source->pDrawable->y;

  if (!miComputeCompositeRegion(&region,
				source, NULL, dest,
				x_source, y_source,
				0, 0,
				x_dest, y_dest,
				width, height))
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    return TRUE;
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  glamor_copy_n_to_n(source->pDrawable,
		     dest->pDrawable, NULL,
		     REGION_RECTS(&region),
		     REGION_NUM_RECTS(&region),
		     x_source - x_dest, y_source - y_dest,
		     FALSE, FALSE, 0, NULL);
  REGION_UNINIT(dest->pDrawable->pScreen,
		&region);
  return TRUE;
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}

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static void
glamor_setup_composite_vbo(ScreenPtr screen)
{
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  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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  glamor_priv->vb_stride = 2 * sizeof(float);
  if (glamor_priv->has_source_coords)
    glamor_priv->vb_stride += 2 * sizeof(float);
  if (glamor_priv->has_mask_coords)
    glamor_priv->vb_stride += 2 * sizeof(float);
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  glBindBuffer(GL_ARRAY_BUFFER, glamor_priv->vbo);
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  glVertexPointer(2, GL_FLOAT, glamor_priv->vb_stride,
		  (void *)((long)glamor_priv->vbo_offset));
  glEnableClientState(GL_VERTEX_ARRAY);
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  if (glamor_priv->has_source_coords) {
    glClientActiveTexture(GL_TEXTURE0);
    glTexCoordPointer(2, GL_FLOAT, glamor_priv->vb_stride,
		      (void *)(glamor_priv->vbo_offset + 2 * sizeof(float)));
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  }

  if (glamor_priv->has_mask_coords) {
    glClientActiveTexture(GL_TEXTURE1);
    glTexCoordPointer(2, GL_FLOAT, glamor_priv->vb_stride,
		      (void *)(glamor_priv->vbo_offset +
			       (glamor_priv->has_source_coords ? 4 : 2) *
			       sizeof(float)));
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  }
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}

static void
glamor_emit_composite_vert(ScreenPtr screen,
			   const float *src_coords,
			   const float *mask_coords,
			   const float *dst_coords,
			   int i)
{
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  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
  float *vb = (float *)(glamor_priv->vb + glamor_priv->vbo_offset);
  int j = 0;

  vb[j++] = dst_coords[i * 2 + 0];
  vb[j++] = dst_coords[i * 2 + 1];
  if (glamor_priv->has_source_coords) {
    vb[j++] = src_coords[i * 2 + 0];
    vb[j++] = src_coords[i * 2 + 1];
  }
  if (glamor_priv->has_mask_coords) {
    vb[j++] = mask_coords[i * 2 + 0];
    vb[j++] = mask_coords[i * 2 + 1];
  }

  glamor_priv->render_nr_verts++;
  glamor_priv->vbo_offset += glamor_priv->vb_stride;
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}

static void
glamor_flush_composite_rects(ScreenPtr screen)
{
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  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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  if (!glamor_priv->render_nr_verts)
    return;
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  glBufferData(GL_ARRAY_BUFFER, glamor_priv->vbo_offset, glamor_priv->vb,
	    GL_STREAM_DRAW);
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  glDrawArrays(GL_QUADS, 0, glamor_priv->render_nr_verts);
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  glamor_reset_composite_vbo(screen);
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}

static void
glamor_emit_composite_rect(ScreenPtr screen,
			   const float *src_coords,
			   const float *mask_coords,
			   const float *dst_coords)
{
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  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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  if (glamor_priv->vbo_offset + 4 * glamor_priv->vb_stride >
      glamor_priv->vbo_size)
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    {
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      glamor_flush_composite_rects(screen);
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    }

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  if (glamor_priv->vbo_offset == 0) {
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    if (glamor_priv->vbo == 0)
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      glGenBuffers(1, &glamor_priv->vbo);
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    glamor_setup_composite_vbo(screen);
  }

  glamor_emit_composite_vert(screen, src_coords, mask_coords, dst_coords, 0);
  glamor_emit_composite_vert(screen, src_coords, mask_coords, dst_coords, 1);
  glamor_emit_composite_vert(screen, src_coords, mask_coords, dst_coords, 2);
  glamor_emit_composite_vert(screen, src_coords, mask_coords, dst_coords, 3);
}


int pict_format_combine_tab[][3] = 
  {
    {PICT_TYPE_ARGB, PICT_TYPE_A, PICT_TYPE_ARGB},
    {PICT_TYPE_ABGR, PICT_TYPE_A, PICT_TYPE_ABGR},
  };

static Bool 
combine_pict_format(PictFormatShort *des, const PictFormatShort src, 
                    const PictFormatShort mask, enum shader_in in_ca)
{
  PictFormatShort new_vis;
  int src_type, mask_type, src_bpp, mask_bpp;
  int i;
  if (src == mask) {
    *des = src;
    return TRUE;
  }
  src_bpp = PICT_FORMAT_BPP(src);
  mask_bpp = PICT_FORMAT_BPP(mask);

  assert(src_bpp == mask_bpp);
 
  new_vis = PICT_FORMAT_VIS(src) | PICT_FORMAT_VIS(mask);

  switch(in_ca) {
  case SHADER_IN_SOURCE_ONLY:
    return TRUE;
  case SHADER_IN_NORMAL:
    src_type = PICT_FORMAT_TYPE(src);
    mask_type = PICT_TYPE_A;
    break;
  case SHADER_IN_CA_SOURCE:
    src_type = PICT_FORMAT_TYPE(src);
    mask_type = PICT_FORMAT_TYPE(mask);
    break;
  case SHADER_IN_CA_ALPHA:
    src_type = PICT_TYPE_A;
    mask_type = PICT_FORMAT_TYPE(mask);
    break;
  default:
    return FALSE;
  }


  if (src_type == mask_type) {
    *des = PICT_VISFORMAT(src_bpp, src_type, new_vis);
    return TRUE;
  }

  for(i = 0; 
      i < sizeof(pict_format_combine_tab)/sizeof(pict_format_combine_tab[0]);
      i++) 
    {
      if ((src_type == pict_format_combine_tab[i][0] 
	   && mask_type == pict_format_combine_tab[i][1])
	  ||(src_type == pict_format_combine_tab[i][1]
	     && mask_type == pict_format_combine_tab[i][0])) {
        *des = PICT_VISFORMAT(src_bpp, pict_format_combine_tab[i][2], new_vis);
        return TRUE;
      } 
    } 
  return FALSE;
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}

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static Bool
glamor_composite_with_shader(CARD8 op,
			     PicturePtr source,
			     PicturePtr mask,
			     PicturePtr dest,
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			     int nrect,
			     glamor_composite_rect_t *rects)
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{
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  ScreenPtr screen = dest->pDrawable->pScreen;
  glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
  PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(dest->pDrawable);
  PixmapPtr source_pixmap = NULL, mask_pixmap = NULL;
  glamor_pixmap_private *source_pixmap_priv = NULL;
  glamor_pixmap_private *mask_pixmap_priv = NULL;
  glamor_pixmap_private *dest_pixmap_priv = NULL;
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  GLfloat dst_xscale, dst_yscale;
  GLfloat mask_xscale = 1, mask_yscale = 1, src_xscale = 1, src_yscale = 1;
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  struct shader_key key;
  glamor_composite_shader *shader;
  RegionRec region;
  float vertices[8], source_texcoords[8], mask_texcoords[8];
  int i;
  BoxPtr box;
  int dest_x_off, dest_y_off;
  int source_x_off, source_y_off;
  int mask_x_off, mask_y_off;
  enum glamor_pixmap_status source_status = GLAMOR_NONE;
  enum glamor_pixmap_status mask_status = GLAMOR_NONE;
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  PictFormatShort saved_source_format = 0; 
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  float src_matrix[9], mask_matrix[9];
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  GLfloat source_solid_color[4], mask_solid_color[4];
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  dest_pixmap_priv = glamor_get_pixmap_private(dest_pixmap);

  if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(dest_pixmap_priv)) {
    glamor_fallback("dest has no fbo.\n");
    goto fail;
  }
  memset(&key, 0, sizeof(key));
  if (!source->pDrawable) {
    if (source->pSourcePict->type == SourcePictTypeSolidFill) {
      key.source = SHADER_SOURCE_SOLID;
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      glamor_get_rgba_from_pixel(source->pSourcePict->solidFill.color,
				 &source_solid_color[0], 
				 &source_solid_color[1], 
				 &source_solid_color[2], 
				 &source_solid_color[3], 
				 PICT_a8r8g8b8);
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    } else {
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      glamor_fallback("gradient source\n");
      goto fail;
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    }
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  } else {
    key.source = SHADER_SOURCE_TEXTURE_ALPHA;
  }
  if (mask) {
    if (!mask->pDrawable) {
      if (mask->pSourcePict->type == SourcePictTypeSolidFill) {
	key.mask = SHADER_MASK_SOLID;
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        glamor_get_rgba_from_pixel(mask->pSourcePict->solidFill.color,
				 &mask_solid_color[0], 
				 &mask_solid_color[1], 
				 &mask_solid_color[2], 
				 &mask_solid_color[3], 
				 PICT_a8r8g8b8);
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      } else {
	glamor_fallback("gradient mask\n");
	goto fail;
      }
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    } else {
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      key.mask = SHADER_MASK_TEXTURE_ALPHA;
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    }
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    if (!mask->componentAlpha) {
      key.in = SHADER_IN_NORMAL;
    } else {
      /* We only handle two CA modes. */
      if (op == PictOpAdd)
	key.in = SHADER_IN_CA_SOURCE;
      else if (op == PictOpOutReverse) {
	key.in = SHADER_IN_CA_ALPHA;
      } else {
	glamor_fallback("Unsupported component alpha op: %d\n", op);
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	goto fail;
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      }
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    }
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  } else {
    key.mask = SHADER_MASK_NONE;
    key.in = SHADER_IN_SOURCE_ONLY;
  }

  if (source->alphaMap) {
    glamor_fallback("source alphaMap\n");
    goto fail;
  }
  if (mask && mask->alphaMap) {
    glamor_fallback("mask alphaMap\n");
    goto fail;
  }
  if (key.source == SHADER_SOURCE_TEXTURE ||
      key.source == SHADER_SOURCE_TEXTURE_ALPHA) {
    source_pixmap = glamor_get_drawable_pixmap(source->pDrawable);
    source_pixmap_priv = glamor_get_pixmap_private(source_pixmap);
    if (source_pixmap == dest_pixmap) {
      glamor_fallback("source == dest\n");
      goto fail;
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    }
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    if (!source_pixmap_priv || source_pixmap_priv->gl_fbo == 0) {
    /* XXX in Xephyr, we may have gl_fbo equal to 1 but gl_tex 
     * equal to zero when the pixmap is screen pixmap. Then we may
     * refer the tex zero directly latter in the composition. 
     * It seems that it works fine, but it may have potential problem*/
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#ifdef GLAMOR_PIXMAP_DYNAMIC_UPLOAD
      source_status = GLAMOR_UPLOAD_PENDING;
#else
      glamor_fallback("no texture in source\n");
      goto fail;
#endif
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    } 
    else if (source_pixmap_priv->pending_op.type == GLAMOR_PENDING_FILL) {
      key.source = SHADER_SOURCE_SOLID;
      memcpy(source_solid_color, source_pixmap_priv->pending_op.fill.color4fv, 4 * sizeof(float));
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    }
  }
  if (key.mask == SHADER_MASK_TEXTURE ||
      key.mask == SHADER_MASK_TEXTURE_ALPHA) {
    mask_pixmap = glamor_get_drawable_pixmap(mask->pDrawable);
    mask_pixmap_priv = glamor_get_pixmap_private(mask_pixmap);
    if (mask_pixmap == dest_pixmap) {
      glamor_fallback("mask == dest\n");
      goto fail;
    }
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    if (!mask_pixmap_priv || mask_pixmap_priv->gl_fbo == 0) {
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#ifdef GLAMOR_PIXMAP_DYNAMIC_UPLOAD
      mask_status = GLAMOR_UPLOAD_PENDING;
#else
      glamor_fallback("no texture in mask\n");
      goto fail;
#endif
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    }
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    else if (mask_pixmap_priv->pending_op.type == GLAMOR_PENDING_FILL) {
      key.mask = SHADER_MASK_SOLID;
      memcpy(mask_solid_color, mask_pixmap_priv->pending_op.fill.color4fv, 4 * sizeof(float));
    }
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  }
#ifdef GLAMOR_PIXMAP_DYNAMIC_UPLOAD
  if (source_status == GLAMOR_UPLOAD_PENDING 
      && mask_status == GLAMOR_UPLOAD_PENDING 
      && source_pixmap == mask_pixmap) {

    if (source->format != mask->format) {
      saved_source_format = source->format;
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      if (!combine_pict_format(&source->format, source->format, mask->format, key.in)) {
	glamor_fallback("combine source %x mask %x failed.\n", 
			source->format, mask->format);
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	goto fail;
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      }
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      if (source->format != saved_source_format) {
	glamor_picture_format_fixup(source, source_pixmap_priv);
      }
      /* XXX  
       * By default, glamor_upload_picture_to_texture will wire alpha to 1
       * if one picture doesn't have alpha. So we don't do that again in 
       * rendering function. But here is a special case, as source and
       * mask share the same texture but may have different formats. For 
       * example, source doesn't have alpha, but mask has alpha. Then the
       * texture will have the alpha value for the mask. And will not wire
       * to 1 for the source. In this case, we have to use different shader
       * to wire the source's alpha to 1.
       *
       * But this may cause a potential problem if the source's repeat mode 
       * is REPEAT_NONE, and if the source is smaller than the dest, then
       * for the region not covered by the source may be painted incorrectly.
       * because we wire the alpha to 1.
       *
       **/ 
      if (!PICT_FORMAT_A(saved_source_format) && PICT_FORMAT_A(mask->format))
	key.source = SHADER_SOURCE_TEXTURE;
    
      if (!PICT_FORMAT_A(mask->format) && PICT_FORMAT_A(saved_source_format))
	key.mask = SHADER_MASK_TEXTURE;

      mask_status = GLAMOR_NONE;
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    }
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    source_status = glamor_upload_picture_to_texture(source);
     
    if (source_status != GLAMOR_UPLOAD_DONE) {
      glamor_fallback("Failed to upload source texture.\n");
      goto fail;
    }
  } 
  else {
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    if (source_status == GLAMOR_UPLOAD_PENDING) {
      source_status = glamor_upload_picture_to_texture(source);
      if (source_status != GLAMOR_UPLOAD_DONE) {
	glamor_fallback("Failed to upload source texture.\n");
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	goto fail;
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      }
    }
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    if (mask_status == GLAMOR_UPLOAD_PENDING) {
      mask_status = glamor_upload_picture_to_texture(mask);
      if (mask_status != GLAMOR_UPLOAD_DONE) {
	glamor_fallback("Failed to upload mask texture.\n");
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	goto fail;
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      }
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    }
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  }
#endif
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  glamor_set_destination_pixmap_priv_nc(dest_pixmap_priv);
  glamor_validate_pixmap(dest_pixmap);
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  if (!glamor_set_composite_op(screen, op, dest, mask)) {
    goto fail;
  }
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  shader = glamor_lookup_composite_shader(screen, &key);
  if (shader->prog == 0) {
    glamor_fallback("no shader program for this render acccel mode\n");
    goto fail;
  }

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  glUseProgram(shader->prog);
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  if (key.source == SHADER_SOURCE_SOLID) {
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    glamor_set_composite_solid(source_solid_color, shader->source_uniform_location);
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  } else {
    glamor_set_composite_texture(screen, 0, source, source_pixmap_priv);
  }
  if (key.mask != SHADER_MASK_NONE) {
    if (key.mask == SHADER_MASK_SOLID) {
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      glamor_set_composite_solid(mask_solid_color, shader->mask_uniform_location);
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    } else {
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      glamor_set_composite_texture(screen, 1, mask, mask_pixmap_priv);
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    }
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  }

  glamor_priv->has_source_coords = key.source != SHADER_SOURCE_SOLID;
  glamor_priv->has_mask_coords = (key.mask != SHADER_MASK_NONE &&
				  key.mask != SHADER_MASK_SOLID);

  glamor_get_drawable_deltas(dest->pDrawable, dest_pixmap,
			     &dest_x_off, &dest_y_off);
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  pixmap_priv_get_scale(dest_pixmap_priv, &dst_xscale, &dst_yscale);



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  if (glamor_priv->has_source_coords) {
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    glamor_get_drawable_deltas(source->pDrawable, source_pixmap,
			       &source_x_off, &source_y_off);
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    pixmap_priv_get_scale(source_pixmap_priv, &src_xscale, &src_yscale);
    glamor_picture_get_matrixf(source, src_matrix);
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  }
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916
  if (glamor_priv->has_mask_coords) {
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    glamor_get_drawable_deltas(mask->pDrawable, mask_pixmap,
			       &mask_x_off, &mask_y_off);
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    pixmap_priv_get_scale(mask_pixmap_priv, &mask_xscale, &mask_yscale);
    glamor_picture_get_matrixf(mask, mask_matrix);
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  }
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  while (nrect--) {
    INT16 x_source;
    INT16 y_source;
    INT16 x_mask;
    INT16 y_mask;
    INT16 x_dest;
    INT16 y_dest;
    CARD16 width;
    CARD16 height;

    x_dest = rects->x_dst;
    y_dest = rects->y_dst;
    x_source = rects->x_src;
    y_source = rects->y_src;
    x_mask = rects->x_mask;
    y_mask = rects->y_mask;
    width = rects->width;
    height = rects->height;
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    x_dest += dest->pDrawable->x;
    y_dest += dest->pDrawable->y;
    if (source->pDrawable) {
      x_source += source->pDrawable->x;
      y_source += source->pDrawable->y;
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    }
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    if (mask && mask->pDrawable) {
      x_mask += mask->pDrawable->x;
      y_mask += mask->pDrawable->y;
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    }

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    if (!miComputeCompositeRegion(&region,
				  source, mask, dest,
				  x_source, y_source,
				  x_mask, y_mask,
				  x_dest, y_dest,
				  width, height))
      continue;

    x_source += source_x_off;
    y_source += source_y_off;
    x_mask += mask_x_off;
    y_mask += mask_y_off;
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    box = REGION_RECTS(&region);
    for (i = 0; i < REGION_NUM_RECTS(&region); i++) {
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      int vx1 = box[i].x1 + dest_x_off;
      int vx2 = box[i].x2 + dest_x_off;
      int vy1 = box[i].y1 + dest_y_off;
      int vy2 = box[i].y2 + dest_y_off;
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     glamor_set_normalize_vcoords(dst_xscale, dst_yscale, vx1, vy1, vx2, vy2, 
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				   glamor_priv->yInverted, vertices);
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      if (key.source != SHADER_SOURCE_SOLID) {
	int tx1 = box[i].x1 + x_source - x_dest;
	int ty1 = box[i].y1 + y_source - y_dest;
	int tx2 = box[i].x2 + x_source - x_dest;
	int ty2 = box[i].y2 + y_source - y_dest;
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	if (source->transform)
	  glamor_set_transformed_normalize_tcoords(src_matrix, src_xscale, src_yscale, 
						   tx1, ty1, tx2, ty2,
						   glamor_priv->yInverted, 
						   source_texcoords);
	else
	  glamor_set_normalize_tcoords(src_xscale, src_yscale, tx1, ty1, tx2, ty2,
				       glamor_priv->yInverted, source_texcoords);
      }   
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      if (key.mask != SHADER_MASK_NONE && key.mask != SHADER_MASK_SOLID) {
	float tx1 = box[i].x1 + x_mask - x_dest;
	float ty1 = box[i].y1 + y_mask - y_dest;
	float tx2 = box[i].x2 + x_mask - x_dest;
	float ty2 = box[i].y2 + y_mask - y_dest;
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	if (mask->transform)
	  glamor_set_transformed_normalize_tcoords(mask_matrix, mask_xscale, mask_yscale, 
						   tx1, ty1, tx2, ty2,
						   glamor_priv->yInverted, 
						   mask_texcoords);
	else
	  glamor_set_normalize_tcoords(mask_xscale, mask_yscale, tx1, ty1, tx2, ty2,
				       glamor_priv->yInverted, mask_texcoords);
1003 1004 1005
      }
      glamor_emit_composite_rect(screen, source_texcoords,
				 mask_texcoords, vertices);
1006
    }
1007 1008 1009 1010
    rects++;
  }
  glamor_flush_composite_rects(screen);

1011
  glBindBuffer(GL_ARRAY_BUFFER, 0);
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023
  glClientActiveTexture(GL_TEXTURE0);
  glDisableClientState(GL_TEXTURE_COORD_ARRAY);
  glClientActiveTexture(GL_TEXTURE1);
  glDisableClientState(GL_TEXTURE_COORD_ARRAY);
  glDisableClientState(GL_VERTEX_ARRAY);

  REGION_UNINIT(dst->pDrawable->pScreen, &region);
  glDisable(GL_BLEND);
  glActiveTexture(GL_TEXTURE0);
  glDisable(GL_TEXTURE_2D);
  glActiveTexture(GL_TEXTURE1);
  glDisable(GL_TEXTURE_2D);
1024
  glUseProgram(0);
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  if (saved_source_format) 
    source->format = saved_source_format;
  return TRUE;

 fail:
  if (saved_source_format) 
    source->format = saved_source_format;

  glDisable(GL_BLEND);
1034
  glUseProgram(0);
1035
  return FALSE;
1036 1037
}

1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
static PicturePtr
glamor_convert_gradient_picture(ScreenPtr screen,
                                PicturePtr source,
                                int x_source,
                                int y_source,
                                int width,
                                int height)
{
  PixmapPtr pixmap;
  PicturePtr dst;
  int error;
  PictFormatShort format;

  if (!source->pDrawable)
    format = PICT_a8r8g8b8;
  else
    format = source->format;

  pixmap = screen->CreatePixmap(screen, 
                                width, 
                                height, 
                                PIXMAN_FORMAT_DEPTH(format),
                                GLAMOR_CREATE_PIXMAP_CPU);

  if (!pixmap)
    return NULL;
  
  dst = CreatePicture(0, 
                      &pixmap->drawable,
                      PictureMatchFormat(screen,
                                         PIXMAN_FORMAT_DEPTH(format),
                                         format),
                      0, 
                      0, 
                      serverClient, 
                      &error);
  screen->DestroyPixmap(pixmap);
  if (!dst)
     return NULL;

  ValidatePicture(dst);

  fbComposite(PictOpSrc, source, NULL, dst, x_source, y_source,
              0, 0, 0, 0, width, height);
  return dst;
}

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void
glamor_composite(CARD8 op,
		 PicturePtr source,
		 PicturePtr mask,
		 PicturePtr dest,
		 INT16 x_source,
		 INT16 y_source,
		 INT16 x_mask,
		 INT16 y_mask,
		 INT16 x_dest,
		 INT16 y_dest,
		 CARD16 width,
		 CARD16 height)
{
1099
  ScreenPtr screen = dest->pDrawable->pScreen;
1100 1101
  glamor_pixmap_private *dest_pixmap_priv;
  glamor_pixmap_private *source_pixmap_priv = NULL, *mask_pixmap_priv = NULL;
1102
  PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(dest->pDrawable);
1103
  PixmapPtr source_pixmap = NULL, mask_pixmap = NULL;
1104 1105
  PicturePtr temp_src = source, temp_mask = mask;
  int x_temp_src, y_temp_src, x_temp_mask, y_temp_mask;
1106 1107
  glamor_composite_rect_t rect;

1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
  x_temp_src = x_source;
  y_temp_src = y_source;
  x_temp_mask = x_mask;
  y_temp_mask = y_mask;

  dest_pixmap_priv = glamor_get_pixmap_private(dest_pixmap);
  /* Currently. Always fallback to cpu if destination is in CPU memory. */
  if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(dest_pixmap_priv)) {
    goto fail;
  }

  if (source->pDrawable) {
    source_pixmap = glamor_get_drawable_pixmap(source->pDrawable);
    source_pixmap_priv = glamor_get_pixmap_private(source_pixmap);
  }

  if (mask && mask->pDrawable) {
    mask_pixmap = glamor_get_drawable_pixmap(mask->pDrawable);
    mask_pixmap_priv = glamor_get_pixmap_private(mask_pixmap);
  }

  if ((!source->pDrawable && (source->pSourcePict->type != SourcePictTypeSolidFill))
      || (source->pDrawable 
	  && !GLAMOR_PIXMAP_PRIV_HAS_FBO(source_pixmap_priv) 
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	  && ((width * height * 4 
	       < (source_pixmap->drawable.width * source_pixmap->drawable.height))
	      || !(glamor_check_fbo_width_height(source_pixmap->drawable.width,
						 source_pixmap->drawable.height))))) {
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
    temp_src = glamor_convert_gradient_picture(screen, source, x_source, y_source, width, height);
    if (!temp_src) {
      temp_src = source;
      goto fail; 
    }
    x_temp_src = y_temp_src = 0;
  }

  if (mask 
      && ((!mask->pDrawable && (mask->pSourcePict->type != SourcePictTypeSolidFill))
	  || (mask->pDrawable 
	      && (!GLAMOR_PIXMAP_PRIV_HAS_FBO(mask_pixmap_priv))
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	      && ((width * height * 4 
		   < (mask_pixmap->drawable.width * mask_pixmap->drawable.height))
		  || !(glamor_check_fbo_width_height(mask_pixmap->drawable.width,
						     mask_pixmap->drawable.height)))))) {
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    /* XXX if mask->pDrawable is the same as source->pDrawable, we have an opportunity
     * to do reduce one convertion. */
    temp_mask = glamor_convert_gradient_picture(screen, mask, x_mask, y_mask, width, height);
    if (!temp_mask) {
      temp_mask = mask;
      goto fail; 
    }
    x_temp_mask = y_temp_mask = 0;
  }
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  /* Do two-pass PictOpOver componentAlpha, until we enable
   * dual source color blending.
   */
1164

1165 1166 1167
  if (mask && mask->componentAlpha) {
    if (op == PictOpOver) {
      glamor_composite(PictOpOutReverse,
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		       temp_src, temp_mask, dest,
		       x_temp_src, y_temp_src,
		       x_temp_mask, y_temp_mask,
1171 1172 1173
		       x_dest, y_dest,
		       width, height);
      glamor_composite(PictOpAdd,
1174 1175 1176
		       temp_src, temp_mask, dest,
		       x_temp_src, y_temp_src,
		       x_temp_mask, y_temp_mask,
1177 1178
		       x_dest, y_dest,
		       width, height);
1179 1180
      goto done;

1181 1182 1183
    } else if (op != PictOpAdd && op != PictOpOutReverse) {
      glamor_fallback("glamor_composite(): component alpha\n");
      goto fail;
1184
    }
1185 1186 1187
  }

  if (!mask) {
1188 1189
    if (glamor_composite_with_copy(op, temp_src, dest,
				   x_temp_src, y_temp_src,
1190 1191
				   x_dest, y_dest,
				   width, height))
1192
      goto done;
1193 1194
  }

1195 1196 1197 1198
  rect.x_src = x_temp_src;
  rect.y_src = y_temp_src;
  rect.x_mask = x_temp_mask;
  rect.y_mask = y_temp_mask;
1199 1200 1201 1202
  rect.x_dst = x_dest;
  rect.y_dst = y_dest;
  rect.width = width;
  rect.height = height;
1203 1204
  if (glamor_composite_with_shader(op, temp_src, temp_mask, dest, 1, &rect))
    goto done;
1205

1206
fail:
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217

  glamor_fallback(
		  "from picts %p:%p %dx%d / %p:%p %d x %d (%c,%c)  to pict %p:%p %dx%d (%c)\n",
		  source, 
                  source->pDrawable,
		  source->pDrawable ? source->pDrawable->width : 0,
		  source->pDrawable ? source->pDrawable->height : 0,
		  mask, 
                  (!mask) ? NULL : mask->pDrawable,
		  (!mask || !mask->pDrawable)? 0 : mask->pDrawable->width,
		  (!mask || !mask->pDrawable)? 0 : mask->pDrawable->height,
1218 1219 1220
		  glamor_get_picture_location(source),
		  glamor_get_picture_location(mask),
		  dest,
1221 1222 1223
		  dest->pDrawable,
		  dest->pDrawable->width,
		  dest->pDrawable->height,
1224 1225
		  glamor_get_picture_location(dest));

1226
  glUseProgram(0);
1227
  glDisable(GL_BLEND);
1228
  if (glamor_prepare_access_picture(dest, GLAMOR_ACCESS_RW)) {
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246
    if (glamor_prepare_access_picture(source, GLAMOR_ACCESS_RO))
      {
	if (!mask ||
	    glamor_prepare_access_picture(mask, GLAMOR_ACCESS_RO))
	  {
	    fbComposite(op,
			source, mask, dest,
			x_source, y_source,
			x_mask, y_mask,
			x_dest, y_dest,
			width, height);
	    if (mask)
	      glamor_finish_access_picture(mask);
	  }
	glamor_finish_access_picture(source);
      }
    glamor_finish_access_picture(dest);
  }
1247 1248 1249 1250 1251
done:
    if (temp_src != source)
      FreePicture(temp_src, 0);
    if (temp_mask != mask)
      FreePicture(temp_mask, 0);
1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265
}


/**
 * Creates an appropriate picture to upload our alpha mask into (which
 * we calculated in system memory)
 */
static PicturePtr
glamor_create_mask_picture(ScreenPtr screen,
			   PicturePtr dst,
			   PictFormatPtr pict_format,
			   CARD16 width,
			   CARD16 height)
{
1266 1267 1268
  PixmapPtr pixmap;
  PicturePtr picture;
  int	error;
1269

1270 1271 1272 1273 1274 1275 1276 1277 1278
  if (!pict_format) {
    if (dst->polyEdge == PolyEdgeSharp)
      pict_format = PictureMatchFormat(screen, 1, PICT_a1);
    else
      pict_format = PictureMatchFormat(screen, 8, PICT_a8);
    if (!pict_format)
      return 0;
  }

1279
  pixmap = screen->CreatePixmap(screen, 0, 0,
1280
				pict_format->depth,
1281
				GLAMOR_CREATE_PIXMAP_CPU);
1282 1283 1284 1285 1286 1287
  if (!pixmap)
    return 0;
  picture = CreatePicture(0, &pixmap->drawable, pict_format,
			  0, 0, serverClient, &error);
  screen->DestroyPixmap(pixmap);
  return picture;
1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
}

/**
 * glamor_trapezoids is a copy of miTrapezoids that does all the trapezoid
 * accumulation in system memory.
 */
void
glamor_trapezoids(CARD8 op,
		  PicturePtr src, PicturePtr dst,
		  PictFormatPtr mask_format, INT16 x_src, INT16 y_src,
		  int ntrap, xTrapezoid *traps)
{
1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321
  ScreenPtr screen = dst->pDrawable->pScreen;
  BoxRec bounds;
  PicturePtr picture;
  INT16 x_dst, y_dst;
  INT16 x_rel, y_rel;
  int width, height, stride;
  PixmapPtr pixmap;
  pixman_image_t *image;

  /* If a mask format wasn't provided, we get to choose, but behavior should
   * be as if there was no temporary mask the traps were accumulated into.
   */
  if (!mask_format) {
    if (dst->polyEdge == PolyEdgeSharp)
      mask_format = PictureMatchFormat(screen, 1, PICT_a1);
    else
      mask_format = PictureMatchFormat(screen, 8, PICT_a8);
    for (; ntrap; ntrap--, traps++)
      glamor_trapezoids(op, src, dst, mask_format, x_src, y_src,
			1, traps);
    return;
  }
1322

1323
  miTrapezoidBounds(ntrap, traps, &bounds);
1324

1325 1326
  if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
    return;
1327

1328 1329
  x_dst = traps[0].left.p1.x >> 16;
  y_dst = traps[0].left.p1.y >> 16;
1330

1331 1332
  width = bounds.x2 - bounds.x1;
  height = bounds.y2 - bounds.y1;
1333
  stride = PixmapBytePad(width, mask_format->depth);
1334 1335 1336 1337
  picture = glamor_create_mask_picture(screen, dst, mask_format,
				       width, height);
  if (!picture)
    return;
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