glamor_render.c 27.4 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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};

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_pixmap_header =
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	"uniform sampler2D source_sampler;\n";
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    const char *source_solid_header =
	"uniform vec4 source;\n";
    const char *mask_pixmap_header =
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	"uniform sampler2D mask_sampler;\n";
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    const char *mask_solid_header =
	"uniform vec4 mask;\n";
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    const char *main_opening =
	"void main()\n"
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	"{\n";
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    const char *source_alpha_pixmap_fetch =
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	"	vec4 source = texture2D(source_sampler, gl_TexCoord[0].xy);\n";
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    const char *source_pixmap_fetch =
	"	vec4 source = vec4(texture2D(source_sampler, "
	"				     gl_TexCoord[0].xy).rgb, 1.0);\n";
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    const char *mask_alpha_pixmap_fetch =
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	"	vec4 mask = texture2D(mask_sampler, gl_TexCoord[1].xy);\n";
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    const char *mask_pixmap_fetch =
	"	vec4 mask = vec4(texture2D(mask_sampler, "
	"				   gl_TexCoord[1].xy).rgb, 1.0);\n";
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    const char *source_in_mask =
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	"	gl_FragColor = source * mask.a;\n";
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    const char *source_only =
	"	gl_FragColor = source;\n";
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    const char *main_closing =
	"}\n";
    char *source;
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    const char *source_setup = "";
    const char *source_fetch = "";
    const char *mask_setup = "";
    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_setup = source_solid_header;
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	break;
    case SHADER_SOURCE_TEXTURE_ALPHA:
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	source_setup = source_pixmap_header;
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	source_fetch = source_alpha_pixmap_fetch;
	break;
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    case SHADER_SOURCE_TEXTURE:
	source_setup = source_pixmap_header;
	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:
	mask_setup = mask_solid_header;
	break;
    case SHADER_MASK_TEXTURE_ALPHA:
	mask_setup = mask_pixmap_header;
	mask_fetch = mask_alpha_pixmap_fetch;
	break;
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    case SHADER_MASK_TEXTURE:
	mask_setup = mask_pixmap_header;
	mask_fetch = mask_pixmap_fetch;
	break;
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    default:
	FatalError("Bad composite shader mask");
    }

    if (key->mask == SHADER_MASK_NONE) {
	in = source_only;
    } else {
	in = source_in_mask;
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    }
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    source = XNFprintf("%s%s%s%s%s%s%s",
		       source_setup,
		       mask_setup,
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		       main_opening,
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		       source_fetch,
		       mask_fetch,
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		       in,
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		       main_closing);

    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];
    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) {
    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) {
    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;
    }
}

static Bool
glamor_composite_with_shader(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)
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{
    ScreenPtr screen = dest->pDrawable->pScreen;
    PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(dest->pDrawable);
    PixmapPtr source_pixmap, mask_pixmap = NULL;
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    glamor_pixmap_private *source_pixmap_priv = NULL;
    glamor_pixmap_private *mask_pixmap_priv = NULL;
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    struct shader_key key;
    glamor_composite_shader *shader;
    RegionRec region;
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    float vertices[4][2], source_texcoords[4][2], mask_texcoords[4][2];
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    int i;
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    BoxPtr box;
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    memset(&key, 0, sizeof(key));
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    if (!source->pDrawable) {
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	if (source->pSourcePict->type == SourcePictTypeSolidFill) {
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	    key.source = SHADER_SOURCE_SOLID;
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	} else {
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	    glamor_fallback("gradient source\n");
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	    goto fail;
	}
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    } else {
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	if (PICT_FORMAT_A(source->format) != 0) {
	    key.source = SHADER_SOURCE_TEXTURE_ALPHA;
	} else {
	    key.source = SHADER_SOURCE_TEXTURE;
	}
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    }
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    if (mask) {
	if (!mask->pDrawable) {
	    if (mask->pSourcePict->type == SourcePictTypeSolidFill) {
		key.mask = SHADER_MASK_SOLID;
	    } else {
		glamor_fallback("gradient mask\n");
		goto fail;
	    }
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	} else {
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	    if (PICT_FORMAT_A(mask->format) != 0) {
		key.mask = SHADER_MASK_TEXTURE_ALPHA;
	    } else {
		key.mask = SHADER_MASK_TEXTURE;
	    }
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	}
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    } else {
	key.mask = SHADER_MASK_NONE;
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    }
    if (source->alphaMap) {
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	glamor_fallback("source alphaMap\n");
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	goto fail;
    }
    if (mask && mask->alphaMap) {
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	glamor_fallback("mask alphaMap\n");
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	goto fail;
    }

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    if (key.source == SHADER_SOURCE_TEXTURE ||
	key.source == SHADER_SOURCE_TEXTURE_ALPHA) {
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	source_pixmap = glamor_get_drawable_pixmap(source->pDrawable);
	source_pixmap_priv = glamor_get_pixmap_private(source_pixmap);
	if (source_pixmap == dest_pixmap) {
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	    glamor_fallback("glamor_composite(): source == dest\n");
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	    goto fail;
	}
	if (!source_pixmap_priv || source_pixmap_priv->tex == 0) {
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	    glamor_fallback("glamor_composite(): no FBO in source\n");
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	    goto fail;
	}
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	if (!good_source_format(source))
	    goto fail;
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    }
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    if (key.mask == SHADER_MASK_TEXTURE ||
	key.mask == SHADER_MASK_TEXTURE_ALPHA) {
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	mask_pixmap = glamor_get_drawable_pixmap(mask->pDrawable);
	mask_pixmap_priv = glamor_get_pixmap_private(mask_pixmap);
	if (mask_pixmap == dest_pixmap) {
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	    glamor_fallback("glamor_composite(): mask == dest\n");
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	    goto fail;
	}
	if (!mask_pixmap_priv || mask_pixmap_priv->tex == 0) {
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	    glamor_fallback("glamor_composite(): no FBO in mask\n");
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	    goto fail;
	}
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	if (!good_mask_format(mask))
	    goto fail;
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    }
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    if (!good_dest_format(dest))
	goto fail;
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    shader = glamor_lookup_composite_shader(screen, &key);
    if (shader->prog == 0) {
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	glamor_fallback("glamor_composite(): "
			"no shader program for this render acccel mode\n");
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	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;
    }

    x_dest += dest->pDrawable->x;
    y_dest += dest->pDrawable->y;
    if (source->pDrawable) {
	x_source += source->pDrawable->x;
	y_source += source->pDrawable->y;
    }
    if (mask && mask->pDrawable) {
	x_mask += mask->pDrawable->x;
	y_mask += mask->pDrawable->y;
    }

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    if (key.source == SHADER_SOURCE_SOLID) {
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	glamor_set_composite_solid(source, shader->source_uniform_location);
    } else {
642
	glamor_set_composite_texture(screen, 0, source, source_pixmap_priv);
643
    }
644 645
    if (key.mask != SHADER_MASK_NONE) {
	if (key.mask == SHADER_MASK_SOLID) {
646 647
	    glamor_set_composite_solid(mask, shader->mask_uniform_location);
	} else {
648
	    glamor_set_composite_texture(screen, 1, mask, mask_pixmap_priv);
649 650
	}
    }
651 652 653 654 655 656 657

    if (!miComputeCompositeRegion(&region,
				  source, mask, dest,
				  x_source, y_source,
				  x_mask, y_mask,
				  x_dest, y_dest,
				  width, height))
658
	goto done;
659

660 661 662 663

    glVertexPointer(2, GL_FLOAT, sizeof(float) * 2, vertices);
    glEnableClientState(GL_VERTEX_ARRAY);

664
    if (key.source != SHADER_SOURCE_SOLID) {
665 666 667 668 669
	glClientActiveTexture(GL_TEXTURE0);
	glTexCoordPointer(2, GL_FLOAT, sizeof(float) * 2, source_texcoords);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
    }

670
    if (key.mask != SHADER_MASK_NONE && key.mask != SHADER_MASK_SOLID) {
671 672 673 674 675 676
	glClientActiveTexture(GL_TEXTURE1);
	glTexCoordPointer(2, GL_FLOAT, sizeof(float) * 2, mask_texcoords);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
    }

    box = REGION_RECTS(&region);
677
    for (i = 0; i < REGION_NUM_RECTS(&region); i++) {
678 679 680 681 682 683 684 685 686
	vertices[0][0] = v_from_x_coord_x(dest_pixmap, box[i].x1);
	vertices[0][1] = v_from_x_coord_y(dest_pixmap, box[i].y1);
	vertices[1][0] = v_from_x_coord_x(dest_pixmap, box[i].x2);
	vertices[1][1] = v_from_x_coord_y(dest_pixmap, box[i].y1);
	vertices[2][0] = v_from_x_coord_x(dest_pixmap, box[i].x2);
	vertices[2][1] = v_from_x_coord_y(dest_pixmap, box[i].y2);
	vertices[3][0] = v_from_x_coord_x(dest_pixmap, box[i].x1);
	vertices[3][1] = v_from_x_coord_y(dest_pixmap, box[i].y2);

687
	if (key.source != SHADER_SOURCE_SOLID) {
688 689 690 691 692 693 694 695 696 697 698 699 700 701
	    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;
	    source_texcoords[0][0] = t_from_x_coord_x(source_pixmap, tx1);
	    source_texcoords[0][1] = t_from_x_coord_y(source_pixmap, ty1);
	    source_texcoords[1][0] = t_from_x_coord_x(source_pixmap, tx2);
	    source_texcoords[1][1] = t_from_x_coord_y(source_pixmap, ty1);
	    source_texcoords[2][0] = t_from_x_coord_x(source_pixmap, tx2);
	    source_texcoords[2][1] = t_from_x_coord_y(source_pixmap, ty2);
	    source_texcoords[3][0] = t_from_x_coord_x(source_pixmap, tx1);
	    source_texcoords[3][1] = t_from_x_coord_y(source_pixmap, ty2);
	}

702
	if (key.mask != SHADER_MASK_NONE && key.mask != SHADER_MASK_SOLID) {
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727
	    int tx1 = box[i].x1 + x_mask - x_dest;
	    int ty1 = box[i].y1 + y_mask - y_dest;
	    int tx2 = box[i].x2 + x_mask - x_dest;
	    int ty2 = box[i].y2 + y_mask - y_dest;
	    mask_texcoords[0][0] = t_from_x_coord_x(mask_pixmap, tx1);
	    mask_texcoords[0][1] = t_from_x_coord_y(mask_pixmap, ty1);
	    mask_texcoords[1][0] = t_from_x_coord_x(mask_pixmap, tx2);
	    mask_texcoords[1][1] = t_from_x_coord_y(mask_pixmap, ty1);
	    mask_texcoords[2][0] = t_from_x_coord_x(mask_pixmap, tx2);
	    mask_texcoords[2][1] = t_from_x_coord_y(mask_pixmap, ty2);
	    mask_texcoords[3][0] = t_from_x_coord_x(mask_pixmap, tx1);
	    mask_texcoords[3][1] = t_from_x_coord_y(mask_pixmap, ty2);
	}
#if 0
 else memset(mask_texcoords, 0, sizeof(mask_texcoords));
	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]);
	}
#endif

	glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
728 729
    }

730 731 732 733 734 735 736 737
    glClientActiveTexture(GL_TEXTURE0);
    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
    glClientActiveTexture(GL_TEXTURE1);
    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
    glDisableClientState(GL_VERTEX_ARRAY);

done:
    REGION_UNINIT(dst->pDrawable->pScreen, &region);
738
    glDisable(GL_BLEND);
739 740 741 742
    glActiveTexture(GL_TEXTURE0);
    glDisable(GL_TEXTURE_2D);
    glActiveTexture(GL_TEXTURE1);
    glDisable(GL_TEXTURE_2D);
743
    glUseProgramObjectARB(0);
744
    return TRUE;
745 746

fail:
747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801
    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)
{
    /* Do two-pass PictOpOver componentAlpha, until we enable
     * dual source color blending.
     */
    if (mask && mask->componentAlpha)
	goto fail;
    if (mask && mask->componentAlpha && 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;
    }

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

    if (glamor_composite_with_shader(op, source, mask, dest,
				     x_source, y_source,
				     x_mask, y_mask,
				     x_dest, y_dest,
				     width, height))
	return;

802
    glamor_fallback("glamor_composite(): "
803 804 805 806 807 808
		    "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));
809
fail:
810
    glUseProgramObjectARB(0);
811
    glDisable(GL_BLEND);
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832
    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);
    }
833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970
}


/**
 * 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);
}

971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997
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);

    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++;
    }
}

998
#endif /* RENDER */