glamor_render.c 33.1 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;

    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);
    texcoord[1] = t_from_x_coord_y(pixmap, ty);
}

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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);
}

684 685 686 687 688
static Bool
glamor_composite_with_shader(CARD8 op,
			     PicturePtr source,
			     PicturePtr mask,
			     PicturePtr dest,
689 690
			     int nrect,
			     glamor_composite_rect_t *rects)
691 692
{
    ScreenPtr screen = dest->pDrawable->pScreen;
693
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
694
    PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(dest->pDrawable);
695
    PixmapPtr source_pixmap = NULL, mask_pixmap = NULL;
696 697
    glamor_pixmap_private *source_pixmap_priv = NULL;
    glamor_pixmap_private *mask_pixmap_priv = NULL;
698 699 700
    struct shader_key key;
    glamor_composite_shader *shader;
    RegionRec region;
701
    float vertices[8], source_texcoords[8], mask_texcoords[8];
702
    int i;
703
    BoxPtr box;
704 705 706
    int dest_x_off, dest_y_off;
    int source_x_off, source_y_off;
    int mask_x_off, mask_y_off;
707

708
    memset(&key, 0, sizeof(key));
709
    if (!source->pDrawable) {
710
	if (source->pSourcePict->type == SourcePictTypeSolidFill) {
711
	    key.source = SHADER_SOURCE_SOLID;
712
	} else {
713
	    glamor_fallback("gradient source\n");
714 715
	    goto fail;
	}
716
    } else {
717 718 719 720 721
	if (PICT_FORMAT_A(source->format) != 0) {
	    key.source = SHADER_SOURCE_TEXTURE_ALPHA;
	} else {
	    key.source = SHADER_SOURCE_TEXTURE;
	}
722
    }
723 724 725 726 727 728 729 730
    if (mask) {
	if (!mask->pDrawable) {
	    if (mask->pSourcePict->type == SourcePictTypeSolidFill) {
		key.mask = SHADER_MASK_SOLID;
	    } else {
		glamor_fallback("gradient mask\n");
		goto fail;
	    }
731
	} else {
732 733 734 735 736
	    if (PICT_FORMAT_A(mask->format) != 0) {
		key.mask = SHADER_MASK_TEXTURE_ALPHA;
	    } else {
		key.mask = SHADER_MASK_TEXTURE;
	    }
737
	}
738

739 740 741 742 743 744
	if (!mask->componentAlpha) {
	    key.in = SHADER_IN_NORMAL;
	} else {
	    /* We only handle two CA modes. */
	    if (op == PictOpAdd)
		key.in = SHADER_IN_CA_SOURCE;
745
	    else if (op == PictOpOutReverse) {
746
		key.in = SHADER_IN_CA_ALPHA;
747 748 749
	    } else {
		glamor_fallback("Unsupported component alpha op: %d\n", op);
		goto fail;
750 751
	    }
	}
752 753
    } else {
	key.mask = SHADER_MASK_NONE;
754
	key.in = SHADER_IN_SOURCE_ONLY;
755
    }
756

757
    if (source->alphaMap) {
758
	glamor_fallback("source alphaMap\n");
759 760 761
	goto fail;
    }
    if (mask && mask->alphaMap) {
762
	glamor_fallback("mask alphaMap\n");
763 764 765
	goto fail;
    }

766 767
    if (key.source == SHADER_SOURCE_TEXTURE ||
	key.source == SHADER_SOURCE_TEXTURE_ALPHA) {
768 769 770
	source_pixmap = glamor_get_drawable_pixmap(source->pDrawable);
	source_pixmap_priv = glamor_get_pixmap_private(source_pixmap);
	if (source_pixmap == dest_pixmap) {
771
	    glamor_fallback("glamor_composite(): source == dest\n");
772 773 774
	    goto fail;
	}
	if (!source_pixmap_priv || source_pixmap_priv->tex == 0) {
775
	    glamor_fallback("glamor_composite(): no texture in source\n");
776 777
	    goto fail;
	}
778 779
	if (!good_source_format(source))
	    goto fail;
780
    }
781 782
    if (key.mask == SHADER_MASK_TEXTURE ||
	key.mask == SHADER_MASK_TEXTURE_ALPHA) {
783 784 785
	mask_pixmap = glamor_get_drawable_pixmap(mask->pDrawable);
	mask_pixmap_priv = glamor_get_pixmap_private(mask_pixmap);
	if (mask_pixmap == dest_pixmap) {
786
	    glamor_fallback("glamor_composite(): mask == dest\n");
787 788 789
	    goto fail;
	}
	if (!mask_pixmap_priv || mask_pixmap_priv->tex == 0) {
790
	    glamor_fallback("glamor_composite(): no texture in mask\n");
791 792
	    goto fail;
	}
793 794
	if (!good_mask_format(mask))
	    goto fail;
795
    }
796 797
    if (!good_dest_format(dest))
	goto fail;
798 799 800

    shader = glamor_lookup_composite_shader(screen, &key);
    if (shader->prog == 0) {
801 802
	glamor_fallback("glamor_composite(): "
			"no shader program for this render acccel mode\n");
803 804 805 806 807 808 809 810 811 812 813 814
	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;
    }

815
    if (key.source == SHADER_SOURCE_SOLID) {
816 817
	glamor_set_composite_solid(source, shader->source_uniform_location);
    } else {
818
	glamor_set_composite_texture(screen, 0, source, source_pixmap_priv);
819
    }
820 821
    if (key.mask != SHADER_MASK_NONE) {
	if (key.mask == SHADER_MASK_SOLID) {
822 823
	    glamor_set_composite_solid(mask, shader->mask_uniform_location);
	} else {
824
	    glamor_set_composite_texture(screen, 1, mask, mask_pixmap_priv);
825 826
	}
    }
827

828 829 830
    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);
831

832
    glamor_get_drawable_deltas(dest->pDrawable, dest_pixmap,
833
			       &dest_x_off, &dest_y_off);
834
    if (source_pixmap) {
835 836
	glamor_get_drawable_deltas(source->pDrawable, source_pixmap,
				   &source_x_off, &source_y_off);
837 838
    }
    if (mask_pixmap) {
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
	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;
867
	}
868 869 870
	if (mask && mask->pDrawable) {
	    x_mask += mask->pDrawable->x;
	    y_mask += mask->pDrawable->y;
871
	}
872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887

	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++) {
888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
	    vertices[0] = v_from_x_coord_x(dest_pixmap,
					   box[i].x1 + dest_x_off);
	    vertices[1] = v_from_x_coord_y(dest_pixmap,
					   box[i].y1 + dest_y_off);
	    vertices[2] = v_from_x_coord_x(dest_pixmap,
					   box[i].x2 + dest_x_off);
	    vertices[3] = v_from_x_coord_y(dest_pixmap,
					   box[i].y1 + dest_y_off);
	    vertices[4] = v_from_x_coord_x(dest_pixmap,
					   box[i].x2 + dest_x_off);
	    vertices[5] = v_from_x_coord_y(dest_pixmap,
					   box[i].y2 + dest_y_off);
	    vertices[6] = v_from_x_coord_x(dest_pixmap,
					   box[i].x1 + dest_x_off);
	    vertices[7] = v_from_x_coord_y(dest_pixmap,
					   box[i].y2 + dest_y_off);
904 905 906 907 908 909 910 911

	    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,
912
					     source_texcoords + 0, tx1, ty1);
913
		glamor_set_transformed_point(source, source_pixmap,
914
					     source_texcoords + 2, tx2, ty1);
915
		glamor_set_transformed_point(source, source_pixmap,
916
					     source_texcoords + 4, tx2, ty2);
917
		glamor_set_transformed_point(source, source_pixmap,
918
					     source_texcoords + 6, tx1, ty2);
919 920 921 922 923 924 925 926 927
	    }

	    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,
928
					     mask_texcoords + 0, tx1, ty1);
929
		glamor_set_transformed_point(mask, mask_pixmap,
930
					     mask_texcoords + 2, tx2, ty1);
931
		glamor_set_transformed_point(mask, mask_pixmap,
932
					     mask_texcoords + 4, tx2, ty2);
933
		glamor_set_transformed_point(mask, mask_pixmap,
934
					     mask_texcoords + 6, tx1, ty2);
935
	    }
936 937
#if 0
 else memset(mask_texcoords, 0, sizeof(mask_texcoords));
938 939 940 941 942 943 944 945
	    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]);
	    }
946 947
#endif

948 949
	    glamor_emit_composite_rect(screen, source_texcoords,
				       mask_texcoords, vertices);
950 951
	}
	rects++;
952 953
    }

954 955 956
    glamor_flush_composite_rects(screen);

    glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
957 958 959 960 961 962 963
    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);
964
    glDisable(GL_BLEND);
965 966 967 968
    glActiveTexture(GL_TEXTURE0);
    glDisable(GL_TEXTURE_2D);
    glActiveTexture(GL_TEXTURE1);
    glDisable(GL_TEXTURE_2D);
969
    glUseProgramObjectARB(0);
970
    return TRUE;
971 972

fail:
973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991
    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)
{
992 993
    glamor_composite_rect_t rect;

994 995 996
    /* Do two-pass PictOpOver componentAlpha, until we enable
     * dual source color blending.
     */
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015
    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;
	}
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
    }

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

1026 1027 1028 1029 1030 1031 1032 1033 1034
    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))
1035 1036
	return;

1037
fail:
1038
    glamor_fallback("glamor_composite(): "
1039 1040 1041 1042 1043 1044
		    "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));
1045

1046
    glUseProgramObjectARB(0);
1047
    glDisable(GL_BLEND);
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
    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);
    }
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 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
}


/**
 * 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);
}

1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217
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);

1218 1219 1220
    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++;
    }
}

1237
#endif /* RENDER */