glamor_render.c 33 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"
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        "       return texture2D(source_sampler, gl_TexCoord[0].xy);\n"
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	"}\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"
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        "       return texture2D(mask_sampler, gl_TexCoord[1].xy);\n"
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	"}\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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    XNFasprintf(&source,
		"%s%s%s",
		source_fetch,
		mask_fetch,
		in);
 
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    prog = glamor_compile_glsl_prog(GL_FRAGMENT_SHADER_ARB, source);
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    free(source);
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    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;

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    XNFasprintf(&source,
		"%s%s%s%s",
		 main_opening,
		 source_coords_setup,
		 mask_coords_setup,
		 main_closing);
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    prog = glamor_compile_glsl_prog(GL_VERTEX_SHADER_ARB, source);
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    free(source);
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    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:
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    case PICT_x8r8g8b8:
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	return TRUE;
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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:
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    case PICT_x8r8g8b8:
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	return TRUE;
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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,
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		    (void *)((long)glamor_priv->vbo_offset));
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    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);
}

676 677 678 679 680
static Bool
glamor_composite_with_shader(CARD8 op,
			     PicturePtr source,
			     PicturePtr mask,
			     PicturePtr dest,
681 682
			     int nrect,
			     glamor_composite_rect_t *rects)
683 684
{
    ScreenPtr screen = dest->pDrawable->pScreen;
685
    glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
686
    PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(dest->pDrawable);
687
    PixmapPtr source_pixmap = NULL, mask_pixmap = NULL;
688 689
    glamor_pixmap_private *source_pixmap_priv = NULL;
    glamor_pixmap_private *mask_pixmap_priv = NULL;
690 691 692
    struct shader_key key;
    glamor_composite_shader *shader;
    RegionRec region;
693
    float vertices[8], source_texcoords[8], mask_texcoords[8];
694
    int i;
695
    BoxPtr box;
696 697 698
    int dest_x_off, dest_y_off;
    int source_x_off, source_y_off;
    int mask_x_off, mask_y_off;
699

700
    memset(&key, 0, sizeof(key));
701
    if (!source->pDrawable) {
702
	if (source->pSourcePict->type == SourcePictTypeSolidFill) {
703
	    key.source = SHADER_SOURCE_SOLID;
704
	} else {
705
	    glamor_fallback("gradient source\n");
706 707
	    goto fail;
	}
708
    } else {
709 710 711 712 713
	if (PICT_FORMAT_A(source->format) != 0) {
	    key.source = SHADER_SOURCE_TEXTURE_ALPHA;
	} else {
	    key.source = SHADER_SOURCE_TEXTURE;
	}
714
    }
715 716 717 718 719 720 721 722
    if (mask) {
	if (!mask->pDrawable) {
	    if (mask->pSourcePict->type == SourcePictTypeSolidFill) {
		key.mask = SHADER_MASK_SOLID;
	    } else {
		glamor_fallback("gradient mask\n");
		goto fail;
	    }
723
	} else {
724 725 726 727 728
	    if (PICT_FORMAT_A(mask->format) != 0) {
		key.mask = SHADER_MASK_TEXTURE_ALPHA;
	    } else {
		key.mask = SHADER_MASK_TEXTURE;
	    }
729
	}
730

731 732 733 734 735 736
	if (!mask->componentAlpha) {
	    key.in = SHADER_IN_NORMAL;
	} else {
	    /* We only handle two CA modes. */
	    if (op == PictOpAdd)
		key.in = SHADER_IN_CA_SOURCE;
737
	    else if (op == PictOpOutReverse) {
738
		key.in = SHADER_IN_CA_ALPHA;
739 740 741
	    } else {
		glamor_fallback("Unsupported component alpha op: %d\n", op);
		goto fail;
742 743
	    }
	}
744 745
    } else {
	key.mask = SHADER_MASK_NONE;
746
	key.in = SHADER_IN_SOURCE_ONLY;
747
    }
748

749
    if (source->alphaMap) {
750
	glamor_fallback("source alphaMap\n");
751 752 753
	goto fail;
    }
    if (mask && mask->alphaMap) {
754
	glamor_fallback("mask alphaMap\n");
755 756 757
	goto fail;
    }

758 759
    if (key.source == SHADER_SOURCE_TEXTURE ||
	key.source == SHADER_SOURCE_TEXTURE_ALPHA) {
760 761 762
	source_pixmap = glamor_get_drawable_pixmap(source->pDrawable);
	source_pixmap_priv = glamor_get_pixmap_private(source_pixmap);
	if (source_pixmap == dest_pixmap) {
763
	    glamor_fallback("glamor_composite(): source == dest\n");
764 765 766
	    goto fail;
	}
	if (!source_pixmap_priv || source_pixmap_priv->tex == 0) {
767
	    glamor_fallback("glamor_composite(): no texture in source\n");
768 769
	    goto fail;
	}
770 771
	if (!good_source_format(source))
	    goto fail;
772
    }
773 774
    if (key.mask == SHADER_MASK_TEXTURE ||
	key.mask == SHADER_MASK_TEXTURE_ALPHA) {
775 776 777
	mask_pixmap = glamor_get_drawable_pixmap(mask->pDrawable);
	mask_pixmap_priv = glamor_get_pixmap_private(mask_pixmap);
	if (mask_pixmap == dest_pixmap) {
778
	    glamor_fallback("glamor_composite(): mask == dest\n");
779 780 781
	    goto fail;
	}
	if (!mask_pixmap_priv || mask_pixmap_priv->tex == 0) {
782
	    glamor_fallback("glamor_composite(): no texture in mask\n");
783 784
	    goto fail;
	}
785 786
	if (!good_mask_format(mask))
	    goto fail;
787
    }
788 789
    if (!good_dest_format(dest))
	goto fail;
790 791 792

    shader = glamor_lookup_composite_shader(screen, &key);
    if (shader->prog == 0) {
793 794
	glamor_fallback("glamor_composite(): "
			"no shader program for this render acccel mode\n");
795 796 797 798 799 800 801 802 803 804 805 806
	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;
    }

807
    if (key.source == SHADER_SOURCE_SOLID) {
808 809
	glamor_set_composite_solid(source, shader->source_uniform_location);
    } else {
810
	glamor_set_composite_texture(screen, 0, source, source_pixmap_priv);
811
    }
812 813
    if (key.mask != SHADER_MASK_NONE) {
	if (key.mask == SHADER_MASK_SOLID) {
814 815
	    glamor_set_composite_solid(mask, shader->mask_uniform_location);
	} else {
816
	    glamor_set_composite_texture(screen, 1, mask, mask_pixmap_priv);
817 818
	}
    }
819

820 821 822
    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);
823

824
    glamor_get_drawable_deltas(dest->pDrawable, dest_pixmap,
825
			       &dest_x_off, &dest_y_off);
826
    if (source_pixmap) {
827 828
	glamor_get_drawable_deltas(source->pDrawable, source_pixmap,
				   &source_x_off, &source_y_off);
829 830
    }
    if (mask_pixmap) {
831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
	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;
859
	}
860 861 862
	if (mask && mask->pDrawable) {
	    x_mask += mask->pDrawable->x;
	    y_mask += mask->pDrawable->y;
863
	}
864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879

	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++) {
880 881 882 883 884 885 886 887
	    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);
888 889 890 891 892 893 894 895 896

	  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,
897
					   box[i].y2 + dest_y_off);
898

899 900 901 902 903 904 905 906 907 908
	    } 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);
	   }
909 910 911 912 913 914 915
	    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,
916
					     source_texcoords + 0, tx1, ty1);
917
		glamor_set_transformed_point(source, source_pixmap,
918
					     source_texcoords + 2, tx2, ty1);
919
		glamor_set_transformed_point(source, source_pixmap,
920
					     source_texcoords + 4, tx2, ty2);
921
		glamor_set_transformed_point(source, source_pixmap,
922
					     source_texcoords + 6, tx1, ty2);
923 924 925 926 927 928 929 930 931
	    }

	    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,
932
					     mask_texcoords + 0, tx1, ty1);
933
		glamor_set_transformed_point(mask, mask_pixmap,
934
					     mask_texcoords + 2, tx2, ty1);
935
		glamor_set_transformed_point(mask, mask_pixmap,
936
					     mask_texcoords + 4, tx2, ty2);
937
		glamor_set_transformed_point(mask, mask_pixmap,
938
					     mask_texcoords + 6, tx1, ty2);
939
	    }
940 941
#if 0
 else memset(mask_texcoords, 0, sizeof(mask_texcoords));
942 943 944 945 946 947 948 949
	    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]);
	    }
950 951
#endif

952 953
	    glamor_emit_composite_rect(screen, source_texcoords,
				       mask_texcoords, vertices);
954 955
	}
	rects++;
956 957
    }

958 959 960
    glamor_flush_composite_rects(screen);

    glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
961 962 963 964 965 966 967
    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);
968
    glDisable(GL_BLEND);
969 970 971 972
    glActiveTexture(GL_TEXTURE0);
    glDisable(GL_TEXTURE_2D);
    glActiveTexture(GL_TEXTURE1);
    glDisable(GL_TEXTURE_2D);
973
    glUseProgramObjectARB(0);
974
    return TRUE;
975 976

fail:
977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
    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)
{
996 997
    glamor_composite_rect_t rect;

998 999 1000
    /* Do two-pass PictOpOver componentAlpha, until we enable
     * dual source color blending.
     */
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019
    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;
	}
1020 1021 1022 1023 1024 1025 1026 1027 1028 1029
    }

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

1030 1031 1032 1033 1034 1035 1036 1037 1038
    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))
1039 1040
	return;

1041
fail:
1042
    glamor_fallback("glamor_composite(): "
1043 1044 1045 1046 1047 1048
		    "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));
1049

1050
    glUseProgramObjectARB(0);
1051
    glDisable(GL_BLEND);
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
    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);
    }
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 1207 1208 1209 1210
}


/**
 * 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 */