glamor_render.c 33.7 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;
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    enum shader_in in;
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};

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

static struct blendinfo composite_op_info[] = {
    [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},
};

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";
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    const char *source_alpha_pixmap_fetch =
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	"uniform sampler2D source_sampler;\n"
	"vec4 get_source()\n"
	"{\n"
	"	return texture2D(source_sampler, gl_TexCoord[0].xy);\n"
	"}\n";
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    const char *source_pixmap_fetch =
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	"uniform sampler2D source_sampler;\n"
	"vec4 get_source()\n"
	"{\n"
	"	return vec4(texture2D(source_sampler, gl_TexCoord[0].xy).rgb,\n"
	"		    1.0);\n"
	"}\n";
    const char *mask_solid_fetch =
	"uniform vec4 mask;\n"
	"vec4 get_mask()\n"
	"{\n"
	"	return mask;\n"
	"}\n";
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    const char *mask_alpha_pixmap_fetch =
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	"uniform sampler2D mask_sampler;\n"
	"vec4 get_mask()\n"
	"{\n"
	"	return texture2D(mask_sampler, gl_TexCoord[1].xy);\n"
	"}\n";
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    const char *mask_pixmap_fetch =
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	"uniform sampler2D mask_sampler;\n"
	"vec4 get_mask()\n"
	"{\n"
	"	return vec4(texture2D(mask_sampler, gl_TexCoord[1].xy).rgb, \n"
	"		    1.0);\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"
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	"}\n";
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    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";
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    char *source;
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    const char *source_fetch;
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    const char *mask_fetch = "";
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    const char *in;
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    GLuint prog;

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    switch (key->source) {
    case SHADER_SOURCE_SOLID:
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	source_fetch = source_solid_fetch;
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	break;
    case SHADER_SOURCE_TEXTURE_ALPHA:
	source_fetch = source_alpha_pixmap_fetch;
	break;
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    case SHADER_SOURCE_TEXTURE:
	source_fetch = source_pixmap_fetch;
	break;
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    default:
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	FatalError("Bad composite shader source");
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    }
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    switch (key->mask) {
    case SHADER_MASK_NONE:
	break;
    case SHADER_MASK_SOLID:
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	mask_fetch = mask_solid_fetch;
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	break;
    case SHADER_MASK_TEXTURE_ALPHA:
	mask_fetch = mask_alpha_pixmap_fetch;
	break;
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    case SHADER_MASK_TEXTURE:
	mask_fetch = mask_pixmap_fetch;
	break;
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    default:
	FatalError("Bad composite shader mask");
    }

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    switch (key->in) {
    case SHADER_IN_SOURCE_ONLY:
	in = in_source_only;
	break;
    case SHADER_IN_NORMAL:
	in = in_normal;
	break;
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    case SHADER_IN_CA_SOURCE:
	in = in_ca_source;
	break;
    case SHADER_IN_CA_ALPHA:
	in = in_ca_alpha;
	break;
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    default:
	FatalError("Bad composite IN type");
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    }
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    source = XNFprintf("%s%s%s",
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		       source_fetch,
		       mask_fetch,
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		       in);
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    prog = glamor_compile_glsl_prog(GL_FRAGMENT_SHADER_ARB, source);
    xfree(source);

    return prog;
}

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

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    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;

    source = XNFprintf("%s%s%s%s",
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		       main_opening,
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		       source_coords_setup,
		       mask_coords_setup,
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		       main_closing);

    prog = glamor_compile_glsl_prog(GL_VERTEX_SHADER_ARB, source);
    xfree(source);

    return prog;
}

static void
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glamor_create_composite_shader(ScreenPtr screen, struct shader_key *key,
			       glamor_composite_shader *shader)
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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;

    prog = glCreateProgramObjectARB();
    glAttachObjectARB(prog, vs);
    glAttachObjectARB(prog, fs);
    glamor_link_glsl_prog(prog);

    shader->prog = prog;

    glUseProgramObjectARB(prog);
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    if (key->source == SHADER_SOURCE_SOLID) {
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	shader->source_uniform_location = glGetUniformLocationARB(prog,
								  "source");
    } else {
	source_sampler_uniform_location = glGetUniformLocationARB(prog,
								  "source_sampler");
	glUniform1i(source_sampler_uniform_location, 0);
    }
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    if (key->mask != SHADER_MASK_NONE) {
	if (key->mask == SHADER_MASK_SOLID) {
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	    shader->mask_uniform_location = glGetUniformLocationARB(prog,
								    "mask");
	} else {
	    mask_sampler_uniform_location = glGetUniformLocationARB(prog,
								    "mask_sampler");
	    glUniform1i(mask_sampler_uniform_location, 1);
	}
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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];
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    if (shader->prog == 0)
	glamor_create_composite_shader(screen, key, shader);
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    return shader;
}

void
glamor_init_composite_shaders(ScreenPtr screen)
{
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}

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

    if (op >= ARRAY_SIZE(composite_op_info)) {
	ErrorF("unsupported render op\n");
	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) {
	    ErrorF("Dual-source composite blending not supported\n");
	    return GL_FALSE;
	}
	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;
    }

    if (source_blend == GL_ONE && dest_blend == GL_ZERO) {
	glDisable(GL_BLEND);
    } else {
	glEnable(GL_BLEND);
	glBlendFunc(source_blend, dest_blend);
    }
    return TRUE;
}

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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{
    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
glamor_set_composite_solid(PicturePtr picture, GLint uniform_location)
{
    CARD32 c = picture->pSourcePict->solidFill.color; /* a8r8g8b8 */
    float color[4]; /* rgba */

    color[0] = ((c >> 16) & 0xff) / 255.0;
    color[1] = ((c >> 8) & 0xff) / 255.0;
    color[2] = ((c >> 0) & 0xff) / 255.0;
    color[3] = ((c >> 24) & 0xff) / 255.0;

    glUniform4fvARB(uniform_location, 1, color);
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}

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static int
compatible_formats (CARD8 op, PicturePtr dst, PicturePtr src)
{
    if (op == PictOpSrc) {
	if (src->format == dst->format)
	    return 1;

	if (src->format == PICT_a8r8g8b8 && dst->format == PICT_x8r8g8b8)
	    return 1;

	if (src->format == PICT_a8b8g8r8 && dst->format == PICT_x8b8g8r8)
	    return 1;
    } else if (op == PictOpOver) {
	if (src->alphaMap || dst->alphaMap)
	    return 0;

	if (src->format != dst->format)
	    return 0;

	if (src->format == PICT_x8r8g8b8 || src->format == PICT_x8b8g8r8)
	    return 1;
    }

    return 0;
}

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static char
glamor_get_picture_location(PicturePtr picture)
{
    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 '?';
	}
    }
    return glamor_get_drawable_location(picture->pDrawable);
}

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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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{
    RegionRec region;

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    if (!source->pDrawable)
	return FALSE;

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    if (!compatible_formats(op, dest, source))
	return FALSE;

    if (source->repeat || source->transform)
	return FALSE;

    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))
	return TRUE;

    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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static Bool
good_source_format(PicturePtr picture)
{
    switch (picture->format) {
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    case PICT_a1:
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    case PICT_a8:
    case PICT_a8r8g8b8:
	return TRUE;
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    case PICT_x8r8g8b8:
	/* In order to support formats with no alpha, we have to wire the
	 * alpha to 1 in the shader, which conflicts with
	 * GL_CLAMP_TO_BORDERing to transparent.  We could possibly compute
	 * coverage of the texels in the sampling area if we need to, but
	 * that isn't implemented today.
	 */
	return (picture->repeatType != RepeatNone);
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    default:
	glamor_fallback("Bad source format 0x%08x\n", picture->format);
	return FALSE;
    }
}

static Bool
good_mask_format(PicturePtr picture)
{
    switch (picture->format) {
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    case PICT_a1:
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    case PICT_a8:
    case PICT_a8r8g8b8:
	return TRUE;
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    case PICT_x8r8g8b8:
	/* In order to support formats with no alpha, we have to wire the
	 * alpha to 1 in the shader, which conflicts with
	 * GL_CLAMP_TO_BORDERing to transparent.  We could possibly compute
	 * coverage of the texels in the sampling area if we need to, but
	 * that isn't implemented today.
	 */
	return (picture->repeatType != RepeatNone);
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    default:
	glamor_fallback("Bad mask format 0x%08x\n", picture->format);
	return FALSE;
    }
}

static Bool
good_dest_format(PicturePtr picture)
{
    switch (picture->format) {
    case PICT_a8:
    case PICT_a8r8g8b8:
    case PICT_x8r8g8b8:
	return TRUE;
    default:
	glamor_fallback("Bad dest format 0x%08x\n", picture->format);
	return FALSE;
    }
}

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static inline float
xFixedToFloat(pixman_fixed_t val)
{
    return ((float)xFixedToInt(val) + ((float)xFixedFrac(val) / 65536.0));
}

static void
glamor_set_transformed_point(PicturePtr picture, PixmapPtr pixmap,
			     float *texcoord, int x, int y)
{
    float result[3];
    int i;
    float tx, ty;
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    ScreenPtr screen = picture->pDrawable->pScreen;
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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    if (picture->transform) {
	for (i = 0; i < 3; i++) {
	    result[i] = (xFixedToFloat(picture->transform->matrix[i][0]) * x +
			 xFixedToFloat(picture->transform->matrix[i][1]) * y +
			 xFixedToFloat(picture->transform->matrix[i][2]));
	}
	tx = result[0] / result[2];
	ty = result[1] / result[2];
    } else {
	tx = x;
	ty = y;
    }
    texcoord[0] = t_from_x_coord_x(pixmap, tx);
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    if (glamor_priv->yInverted)
      texcoord[1] = t_from_x_coord_y_inverted(pixmap, ty);
    else
      texcoord[1] = t_from_x_coord_y(pixmap, ty);
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}

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static void
glamor_setup_composite_vbo(ScreenPtr screen)
{
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);

    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);

    glBindBufferARB(GL_ARRAY_BUFFER_ARB, glamor_priv->vbo);
    glVertexPointer(2, GL_FLOAT, glamor_priv->vb_stride,
		    (void *)(glamor_priv->vbo_offset));
    glEnableClientState(GL_VERTEX_ARRAY);

    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);
    }
}

static void
glamor_emit_composite_vert(ScreenPtr screen,
			   const float *src_coords,
			   const float *mask_coords,
			   const float *dst_coords,
			   int i)
{
    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;
}

static void
glamor_flush_composite_rects(ScreenPtr screen)
{
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);

    if (!glamor_priv->render_nr_verts)
	return;

    glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
    glamor_priv->vb = NULL;

    glDrawArrays(GL_QUADS, 0, glamor_priv->render_nr_verts);
    glamor_priv->render_nr_verts = 0;
    glamor_priv->vbo_size = 0;
}

static void
glamor_emit_composite_rect(ScreenPtr screen,
			   const float *src_coords,
			   const float *mask_coords,
			   const float *dst_coords)
{
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);

    if (glamor_priv->vbo_offset + 4 * glamor_priv->vb_stride >
	glamor_priv->vbo_size)
    {
	glamor_flush_composite_rects(screen);
    }

    if (glamor_priv->vbo_size == 0) {
	if (glamor_priv->vbo == 0)
	    glGenBuffersARB(1, &glamor_priv->vbo);
	glBindBufferARB(GL_ARRAY_BUFFER_ARB, glamor_priv->vbo);

	glamor_priv->vbo_size = 4096;
	glBufferDataARB(GL_ARRAY_BUFFER_ARB, glamor_priv->vbo_size, NULL,
			GL_STREAM_DRAW_ARB);
	glamor_priv->vbo_offset = 0;
	glamor_priv->vb = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
	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);
}

689 690 691 692 693
static Bool
glamor_composite_with_shader(CARD8 op,
			     PicturePtr source,
			     PicturePtr mask,
			     PicturePtr dest,
694 695
			     int nrect,
			     glamor_composite_rect_t *rects)
696 697
{
    ScreenPtr screen = dest->pDrawable->pScreen;
698
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
699
    PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(dest->pDrawable);
700
    PixmapPtr source_pixmap = NULL, mask_pixmap = NULL;
701 702
    glamor_pixmap_private *source_pixmap_priv = NULL;
    glamor_pixmap_private *mask_pixmap_priv = NULL;
703 704 705
    struct shader_key key;
    glamor_composite_shader *shader;
    RegionRec region;
706
    float vertices[8], source_texcoords[8], mask_texcoords[8];
707
    int i;
708
    BoxPtr box;
709 710 711
    int dest_x_off, dest_y_off;
    int source_x_off, source_y_off;
    int mask_x_off, mask_y_off;
712

713
    memset(&key, 0, sizeof(key));
714
    if (!source->pDrawable) {
715
	if (source->pSourcePict->type == SourcePictTypeSolidFill) {
716
	    key.source = SHADER_SOURCE_SOLID;
717
	} else {
718
	    glamor_fallback("gradient source\n");
719 720
	    goto fail;
	}
721
    } else {
722 723 724 725 726
	if (PICT_FORMAT_A(source->format) != 0) {
	    key.source = SHADER_SOURCE_TEXTURE_ALPHA;
	} else {
	    key.source = SHADER_SOURCE_TEXTURE;
	}
727
    }
728 729 730 731 732 733 734 735
    if (mask) {
	if (!mask->pDrawable) {
	    if (mask->pSourcePict->type == SourcePictTypeSolidFill) {
		key.mask = SHADER_MASK_SOLID;
	    } else {
		glamor_fallback("gradient mask\n");
		goto fail;
	    }
736
	} else {
737 738 739 740 741
	    if (PICT_FORMAT_A(mask->format) != 0) {
		key.mask = SHADER_MASK_TEXTURE_ALPHA;
	    } else {
		key.mask = SHADER_MASK_TEXTURE;
	    }
742
	}
743

744 745 746 747 748 749
	if (!mask->componentAlpha) {
	    key.in = SHADER_IN_NORMAL;
	} else {
	    /* We only handle two CA modes. */
	    if (op == PictOpAdd)
		key.in = SHADER_IN_CA_SOURCE;
750
	    else if (op == PictOpOutReverse) {
751
		key.in = SHADER_IN_CA_ALPHA;
752 753 754
	    } else {
		glamor_fallback("Unsupported component alpha op: %d\n", op);
		goto fail;
755 756
	    }
	}
757 758
    } else {
	key.mask = SHADER_MASK_NONE;
759
	key.in = SHADER_IN_SOURCE_ONLY;
760
    }
761

762
    if (source->alphaMap) {
763
	glamor_fallback("source alphaMap\n");
764 765 766
	goto fail;
    }
    if (mask && mask->alphaMap) {
767
	glamor_fallback("mask alphaMap\n");
768 769 770
	goto fail;
    }

771 772
    if (key.source == SHADER_SOURCE_TEXTURE ||
	key.source == SHADER_SOURCE_TEXTURE_ALPHA) {
773 774 775
	source_pixmap = glamor_get_drawable_pixmap(source->pDrawable);
	source_pixmap_priv = glamor_get_pixmap_private(source_pixmap);
	if (source_pixmap == dest_pixmap) {
776
	    glamor_fallback("glamor_composite(): source == dest\n");
777 778 779
	    goto fail;
	}
	if (!source_pixmap_priv || source_pixmap_priv->tex == 0) {
780
	    glamor_fallback("glamor_composite(): no texture in source\n");
781 782
	    goto fail;
	}
783 784
	if (!good_source_format(source))
	    goto fail;
785
    }
786 787
    if (key.mask == SHADER_MASK_TEXTURE ||
	key.mask == SHADER_MASK_TEXTURE_ALPHA) {
788 789 790
	mask_pixmap = glamor_get_drawable_pixmap(mask->pDrawable);
	mask_pixmap_priv = glamor_get_pixmap_private(mask_pixmap);
	if (mask_pixmap == dest_pixmap) {
791
	    glamor_fallback("glamor_composite(): mask == dest\n");
792 793 794
	    goto fail;
	}
	if (!mask_pixmap_priv || mask_pixmap_priv->tex == 0) {
795
	    glamor_fallback("glamor_composite(): no texture in mask\n");
796 797
	    goto fail;
	}
798 799
	if (!good_mask_format(mask))
	    goto fail;
800
    }
801 802
    if (!good_dest_format(dest))
	goto fail;
803 804 805

    shader = glamor_lookup_composite_shader(screen, &key);
    if (shader->prog == 0) {
806 807
	glamor_fallback("glamor_composite(): "
			"no shader program for this render acccel mode\n");
808 809 810 811 812 813 814 815 816 817 818 819
	goto fail;
    }

    glUseProgramObjectARB(shader->prog);

    if (!glamor_set_destination_pixmap(dest_pixmap))
	goto fail;

    if (!glamor_set_composite_op(screen, op, dest, mask)) {
	goto fail;
    }

820
    if (key.source == SHADER_SOURCE_SOLID) {
821 822
	glamor_set_composite_solid(source, shader->source_uniform_location);
    } else {
823
	glamor_set_composite_texture(screen, 0, source, source_pixmap_priv);
824
    }
825 826
    if (key.mask != SHADER_MASK_NONE) {
	if (key.mask == SHADER_MASK_SOLID) {
827 828
	    glamor_set_composite_solid(mask, shader->mask_uniform_location);
	} else {
829
	    glamor_set_composite_texture(screen, 1, mask, mask_pixmap_priv);
830 831
	}
    }
832

833 834 835
    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);
836

837
    glamor_get_drawable_deltas(dest->pDrawable, dest_pixmap,
838
			       &dest_x_off, &dest_y_off);
839
    if (source_pixmap) {
840 841
	glamor_get_drawable_deltas(source->pDrawable, source_pixmap,
				   &source_x_off, &source_y_off);
842 843
    }
    if (mask_pixmap) {
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871
	glamor_get_drawable_deltas(mask->pDrawable, mask_pixmap,
				   &mask_x_off, &mask_y_off);
    }

    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;

	x_dest += dest->pDrawable->x;
	y_dest += dest->pDrawable->y;
	if (source->pDrawable) {
	    x_source += source->pDrawable->x;
	    y_source += source->pDrawable->y;
872
	}
873 874 875
	if (mask && mask->pDrawable) {
	    x_mask += mask->pDrawable->x;
	    y_mask += mask->pDrawable->y;
876
	}
877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892

	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;

	box = REGION_RECTS(&region);
	for (i = 0; i < REGION_NUM_RECTS(&region); i++) {
893 894 895 896 897 898 899 900
	    vertices[0] = v_from_x_coord_x(dest_pixmap,
					   box[i].x1 + dest_x_off);
	    vertices[2] = v_from_x_coord_x(dest_pixmap,
					   box[i].x2 + dest_x_off);
	    vertices[4] = v_from_x_coord_x(dest_pixmap,
					   box[i].x2 + dest_x_off);
	    vertices[6] = v_from_x_coord_x(dest_pixmap,
					   box[i].x1 + dest_x_off);
901 902 903 904 905 906 907 908 909

	  if (glamor_priv->yInverted) {
	    vertices[1] = v_from_x_coord_y_inverted(dest_pixmap,
					   box[i].y1 + dest_y_off);
	    vertices[3] = v_from_x_coord_y_inverted(dest_pixmap,
					   box[i].y1 + dest_y_off);
	    vertices[5] = v_from_x_coord_y_inverted(dest_pixmap,
					   box[i].y2 + dest_y_off);
	    vertices[7] = v_from_x_coord_y_inverted(dest_pixmap,
910
					   box[i].y2 + dest_y_off);
911

912 913 914 915 916 917 918 919 920 921
	    } else {
	    vertices[1] = v_from_x_coord_y(dest_pixmap,
					   box[i].y1 + dest_y_off);
	    vertices[3] = v_from_x_coord_y(dest_pixmap,
					   box[i].y1 + dest_y_off);
	    vertices[5] = v_from_x_coord_y(dest_pixmap,
					   box[i].y2 + dest_y_off);
	    vertices[7] = v_from_x_coord_y(dest_pixmap,
					   box[i].y2 + dest_y_off);
	   }
922 923 924 925 926 927 928
	    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;

		glamor_set_transformed_point(source, source_pixmap,
929
					     source_texcoords + 0, tx1, ty1);
930
		glamor_set_transformed_point(source, source_pixmap,
931
					     source_texcoords + 2, tx2, ty1);
932
		glamor_set_transformed_point(source, source_pixmap,
933
					     source_texcoords + 4, tx2, ty2);
934
		glamor_set_transformed_point(source, source_pixmap,
935
					     source_texcoords + 6, tx1, ty2);
936 937 938 939 940 941 942 943 944
	    }

	    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;

		glamor_set_transformed_point(mask, mask_pixmap,
945
					     mask_texcoords + 0, tx1, ty1);
946
		glamor_set_transformed_point(mask, mask_pixmap,
947
					     mask_texcoords + 2, tx2, ty1);
948
		glamor_set_transformed_point(mask, mask_pixmap,
949
					     mask_texcoords + 4, tx2, ty2);
950
		glamor_set_transformed_point(mask, mask_pixmap,
951
					     mask_texcoords + 6, tx1, ty2);
952
	    }
953 954
#if 0
 else memset(mask_texcoords, 0, sizeof(mask_texcoords));
955 956 957 958 959 960 961 962
	    for (i = 0; i < 4; i++) {
		ErrorF("%d: (%04.4f, %04.4f) (%04.4f, %04.4f) "
		       "(%04.4f, %04.4f)\n",
		       i,
		       source_texcoords[i][0], source_texcoords[i][1],
		       mask_texcoords[i][0], mask_texcoords[i][1],
		       vertices[i][0], vertices[i][1]);
	    }
963 964
#endif

965 966
	    glamor_emit_composite_rect(screen, source_texcoords,
				       mask_texcoords, vertices);
967 968
	}
	rects++;
969 970
    }

971 972 973
    glamor_flush_composite_rects(screen);

    glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
974 975 976 977 978 979 980
    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);
981
    glDisable(GL_BLEND);
982 983 984 985
    glActiveTexture(GL_TEXTURE0);
    glDisable(GL_TEXTURE_2D);
    glActiveTexture(GL_TEXTURE1);
    glDisable(GL_TEXTURE_2D);
986
    glUseProgramObjectARB(0);
987
    return TRUE;
988 989

fail:
990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
    glDisable(GL_BLEND);
    glUseProgramObjectARB(0);
    return FALSE;
}

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)
{
1009 1010
    glamor_composite_rect_t rect;

1011 1012 1013
    /* Do two-pass PictOpOver componentAlpha, until we enable
     * dual source color blending.
     */
1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
    if (mask && mask->componentAlpha) {
	if (op == PictOpOver) {
	    glamor_composite(PictOpOutReverse,
			     source, mask, dest,
			     x_source, y_source,
			     x_mask, y_mask,
			     x_dest, y_dest,
			     width, height);
	    glamor_composite(PictOpAdd,
			     source, mask, dest,
			     x_source, y_source,
			     x_mask, y_mask,
			     x_dest, y_dest,
			     width, height);
	    return;
	} else if (op != PictOpAdd && op != PictOpOutReverse) {
	    glamor_fallback("glamor_composite(): component alpha\n");
	    goto fail;
	}
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
    }

    if (!mask) {
	if (glamor_composite_with_copy(op, source, dest,
				       x_source, y_source,
				       x_dest, y_dest,
				       width, height))
	    return;
    }

1043 1044 1045 1046 1047 1048 1049 1050 1051
    rect.x_src = x_source;
    rect.y_src = y_source;
    rect.x_mask = x_mask;
    rect.y_mask = y_mask;
    rect.x_dst = x_dest;
    rect.y_dst = y_dest;
    rect.width = width;
    rect.height = height;
    if (glamor_composite_with_shader(op, source, mask, dest, 1, &rect))
1052 1053
	return;

1054
fail:
1055
    glamor_fallback("glamor_composite(): "
1056 1057 1058 1059 1060 1061
		    "from picts %p/%p(%c,%c) to pict %p (%c)\n",
		    source, mask,
		    glamor_get_picture_location(source),
		    glamor_get_picture_location(mask),
		    dest,
		    glamor_get_picture_location(dest));
1062

1063
    glUseProgramObjectARB(0);
1064
    glDisable(GL_BLEND);
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
    if (glamor_prepare_access(dest->pDrawable, GLAMOR_ACCESS_RW)) {
	if (source->pDrawable == NULL ||
	    glamor_prepare_access(source->pDrawable, GLAMOR_ACCESS_RO))
	{
	    if (!mask || mask->pDrawable == NULL ||
		glamor_prepare_access(mask->pDrawable, GLAMOR_ACCESS_RO))
	    {
		fbComposite(op,
			    source, mask, dest,
			    x_source, y_source,
			    x_mask, y_mask,
			    x_dest, y_dest,
			    width, height);
		if (mask && mask->pDrawable != NULL)
		    glamor_finish_access(mask->pDrawable);
	    }
	    if (source->pDrawable != NULL)
		glamor_finish_access(source->pDrawable);
	}
	glamor_finish_access(dest->pDrawable);
    }
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223
}


/**
 * 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)
{
    PixmapPtr pixmap;
    PicturePtr picture;
    int	error;

    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;
    }

    pixmap = screen->CreatePixmap(screen, width, height,
				  pict_format->depth,
				  0);
    if (!pixmap)
	return 0;
    picture = CreatePicture(0, &pixmap->drawable, pict_format,
			    0, 0, serverClient, &error);
    screen->DestroyPixmap(pixmap);
    return picture;
}

/**
 * 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)
{
    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;
    GCPtr gc;
    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;
    }

    miTrapezoidBounds(ntrap, traps, &bounds);

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

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

    width = bounds.x2 - bounds.x1;
    height = bounds.y2 - bounds.y1;
    stride = (width * BitsPerPixel(mask_format->depth) + 7) / 8;

    picture = glamor_create_mask_picture(screen, dst, mask_format,
					 width, height);
    if (!picture)
	return;

    image = pixman_image_create_bits(picture->format,
				     width, height,
				     NULL, stride);
    if (!image) {
	FreePicture(picture, 0);
	return;
    }

    for (; ntrap; ntrap--, traps++)
	pixman_rasterize_trapezoid(image, (pixman_trapezoid_t *) traps,
				   -bounds.x1, -bounds.y1);

    pixmap = GetScratchPixmapHeader(screen, width, height,
				    mask_format->depth,
				    BitsPerPixel(mask_format->depth),
				    PixmapBytePad(width, mask_format->depth),
				    pixman_image_get_data(image));
    if (!pixmap) {
	FreePicture(picture, 0);
	pixman_image_unref(image);
	return;
    }

    gc = GetScratchGC(picture->pDrawable->depth, screen);
    if (!gc) {
	FreeScratchPixmapHeader(pixmap);
	pixman_image_unref (image);
	FreePicture(picture, 0);
	return;
    }
    ValidateGC(picture->pDrawable, gc);

    gc->ops->CopyArea(&pixmap->drawable, picture->pDrawable,
		      gc, 0, 0, width, height, 0, 0);

    FreeScratchGC(gc);
    FreeScratchPixmapHeader(pixmap);
    pixman_image_unref(image);

    x_rel = bounds.x1 + x_src - x_dst;
    y_rel = bounds.y1 + y_src - y_dst;
    CompositePicture(op, src, picture, dst,
		     x_rel, y_rel,
		     0, 0,
		     bounds.x1, bounds.y1,
		     bounds.x2 - bounds.x1, bounds.y2 - bounds.y1);
    FreePicture(picture, 0);
}

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void
glamor_composite_rects(CARD8 op,
		       PicturePtr src, PicturePtr dst,
		       int nrect, glamor_composite_rect_t *rects)
{
    int n;
    glamor_composite_rect_t *r;

    ValidatePicture(src);
    ValidatePicture(dst);

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    if (glamor_composite_with_shader(op, src, NULL, dst, nrect, rects))
	return;

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    n = nrect;
    r = rects;

    while (n--) {
	CompositePicture(op,
			 src,
			 NULL,
			 dst,
			 r->x_src, r->y_src,
			 0, 0,
			 r->x_dst, r->y_dst,
			 r->width, r->height);
	r++;
    }
}

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#endif /* RENDER */