diff options
Diffstat (limited to 'gfx/cairo/cairo/src/cairo-gl-operand.c')
| -rw-r--r-- | gfx/cairo/cairo/src/cairo-gl-operand.c | 793 |
1 files changed, 793 insertions, 0 deletions
diff --git a/gfx/cairo/cairo/src/cairo-gl-operand.c b/gfx/cairo/cairo/src/cairo-gl-operand.c new file mode 100644 index 0000000000..a754bde2f3 --- /dev/null +++ b/gfx/cairo/cairo/src/cairo-gl-operand.c @@ -0,0 +1,793 @@ +/* cairo - a vector graphics library with display and print output + * + * Copyright © 2009 Eric Anholt + * Copyright © 2009 Chris Wilson + * Copyright © 2005,2010 Red Hat, Inc + * Copyright © 2011 Intel Corporation + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + * + * The Original Code is the cairo graphics library. + * + * The Initial Developer of the Original Code is Red Hat, Inc. + * + * Contributor(s): + * Benjamin Otte <otte@gnome.org> + * Carl Worth <cworth@cworth.org> + * Chris Wilson <chris@chris-wilson.co.uk> + * Eric Anholt <eric@anholt.net> + */ + +#include "cairoint.h" + +#include "cairo-gl-private.h" + +#include "cairo-composite-rectangles-private.h" +#include "cairo-compositor-private.h" +#include "cairo-default-context-private.h" +#include "cairo-error-private.h" +#include "cairo-image-surface-private.h" +#include "cairo-surface-backend-private.h" +#include "cairo-surface-offset-private.h" +#include "cairo-surface-subsurface-inline.h" + +static cairo_int_status_t +_cairo_gl_create_gradient_texture (cairo_gl_surface_t *dst, + const cairo_gradient_pattern_t *pattern, + cairo_gl_gradient_t **gradient) +{ + cairo_gl_context_t *ctx; + cairo_status_t status; + + status = _cairo_gl_context_acquire (dst->base.device, &ctx); + if (unlikely (status)) + return status; + + status = _cairo_gl_gradient_create (ctx, pattern->n_stops, pattern->stops, gradient); + + return _cairo_gl_context_release (ctx, status); +} + +static cairo_status_t +_cairo_gl_subsurface_clone_operand_init (cairo_gl_operand_t *operand, + const cairo_pattern_t *_src, + cairo_gl_surface_t *dst, + const cairo_rectangle_int_t *sample, + const cairo_rectangle_int_t *extents, + cairo_bool_t use_texgen) +{ + const cairo_surface_pattern_t *src = (cairo_surface_pattern_t *)_src; + cairo_surface_pattern_t local_pattern; + cairo_surface_subsurface_t *sub; + cairo_gl_surface_t *surface; + cairo_gl_context_t *ctx; + cairo_surface_attributes_t *attributes; + cairo_status_t status; + + sub = (cairo_surface_subsurface_t *) src->surface; + + if (sub->snapshot && + sub->snapshot->type == CAIRO_SURFACE_TYPE_GL && + sub->snapshot->device == dst->base.device) + { + surface = (cairo_gl_surface_t *) + cairo_surface_reference (sub->snapshot); + } + else + { + status = _cairo_gl_context_acquire (dst->base.device, &ctx); + if (unlikely (status)) + return status; + + /* XXX Trim surface to the sample area within the subsurface? */ + surface = (cairo_gl_surface_t *) + _cairo_gl_surface_create_scratch (ctx, + sub->target->content, + sub->extents.width, + sub->extents.height); + if (surface->base.status) + return _cairo_gl_context_release (ctx, surface->base.status); + + _cairo_pattern_init_for_surface (&local_pattern, sub->target); + cairo_matrix_init_translate (&local_pattern.base.matrix, + sub->extents.x, sub->extents.y); + local_pattern.base.filter = CAIRO_FILTER_NEAREST; + status = _cairo_surface_paint (&surface->base, + CAIRO_OPERATOR_SOURCE, + &local_pattern.base, + NULL); + _cairo_pattern_fini (&local_pattern.base); + + status = _cairo_gl_context_release (ctx, status); + if (unlikely (status)) { + cairo_surface_destroy (&surface->base); + return status; + } + + _cairo_surface_subsurface_set_snapshot (&sub->base, &surface->base); + } + + status = _cairo_gl_surface_resolve_multisampling (surface); + if (unlikely (status)) + return status; + + attributes = &operand->texture.attributes; + + operand->type = CAIRO_GL_OPERAND_TEXTURE; + operand->texture.surface = surface; + operand->texture.owns_surface = surface; + operand->texture.tex = surface->tex; + + if (_cairo_gl_device_requires_power_of_two_textures (dst->base.device)) { + attributes->matrix = src->base.matrix; + } else { + cairo_matrix_t m; + + cairo_matrix_init_scale (&m, + 1.0 / surface->width, + 1.0 / surface->height); + cairo_matrix_multiply (&attributes->matrix, &src->base.matrix, &m); + } + + attributes->extend = src->base.extend; + attributes->filter = src->base.filter; + attributes->has_component_alpha = src->base.has_component_alpha; + + operand->texture.texgen = use_texgen; + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_cairo_gl_subsurface_operand_init (cairo_gl_operand_t *operand, + const cairo_pattern_t *_src, + cairo_gl_surface_t *dst, + const cairo_rectangle_int_t *sample, + const cairo_rectangle_int_t *extents, + cairo_bool_t use_texgen) +{ + const cairo_surface_pattern_t *src = (cairo_surface_pattern_t *)_src; + cairo_surface_subsurface_t *sub; + cairo_gl_surface_t *surface; + cairo_surface_attributes_t *attributes; + cairo_int_status_t status; + + sub = (cairo_surface_subsurface_t *) src->surface; + + if (sample->x < 0 || sample->y < 0 || + sample->x + sample->width > sub->extents.width || + sample->y + sample->height > sub->extents.height) + { + return _cairo_gl_subsurface_clone_operand_init (operand, _src, + dst, sample, extents, + use_texgen); + } + + surface = (cairo_gl_surface_t *) sub->target; + if (surface->base.device && surface->base.device != dst->base.device) + return CAIRO_INT_STATUS_UNSUPPORTED; + + if (! _cairo_gl_surface_is_texture (surface)) + return CAIRO_INT_STATUS_UNSUPPORTED; + + status = _cairo_gl_surface_resolve_multisampling (surface); + if (unlikely (status)) + return status; + + /* Translate the matrix from + * (unnormalized src -> unnormalized src) to + * (unnormalized dst -> unnormalized src) + */ + _cairo_gl_operand_copy(operand, &surface->operand); + + attributes = &operand->texture.attributes; + attributes->matrix = src->base.matrix; + attributes->matrix.x0 += sub->extents.x; + attributes->matrix.y0 += sub->extents.y; + cairo_matrix_multiply (&attributes->matrix, + &attributes->matrix, + &surface->operand.texture.attributes.matrix); + + attributes->extend = src->base.extend; + attributes->filter = src->base.filter; + attributes->has_component_alpha = src->base.has_component_alpha; + + operand->texture.texgen = use_texgen; + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_cairo_gl_surface_operand_init (cairo_gl_operand_t *operand, + const cairo_pattern_t *_src, + cairo_gl_surface_t *dst, + const cairo_rectangle_int_t *sample, + const cairo_rectangle_int_t *extents, + cairo_bool_t use_texgen) +{ + const cairo_surface_pattern_t *src = (cairo_surface_pattern_t *)_src; + cairo_gl_surface_t *surface; + cairo_surface_attributes_t *attributes; + cairo_int_status_t status; + + surface = (cairo_gl_surface_t *) src->surface; + if (surface->base.type != CAIRO_SURFACE_TYPE_GL) + return CAIRO_INT_STATUS_UNSUPPORTED; + + if (surface->base.backend->type != CAIRO_SURFACE_TYPE_GL) { + if (_cairo_surface_is_subsurface (&surface->base)) + return _cairo_gl_subsurface_operand_init (operand, _src, dst, + sample, extents, + use_texgen); + + return CAIRO_INT_STATUS_UNSUPPORTED; + } + + if (surface->base.device && surface->base.device != dst->base.device) + return CAIRO_INT_STATUS_UNSUPPORTED; + + if (surface->base.device && ! _cairo_gl_surface_is_texture (surface)) + return CAIRO_INT_STATUS_UNSUPPORTED; + + status = _cairo_gl_surface_resolve_multisampling (surface); + if (unlikely (status)) + return status; + + _cairo_gl_operand_copy(operand, &surface->operand); + + attributes = &operand->texture.attributes; + cairo_matrix_multiply (&attributes->matrix, + &src->base.matrix, + &attributes->matrix); + + attributes->extend = src->base.extend; + attributes->filter = src->base.filter; + attributes->has_component_alpha = src->base.has_component_alpha; + + operand->texture.texgen = use_texgen; + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_cairo_gl_pattern_texture_setup (cairo_gl_operand_t *operand, + const cairo_pattern_t *_src, + cairo_gl_surface_t *dst, + const cairo_rectangle_int_t *extents) +{ + cairo_status_t status; + cairo_gl_surface_t *surface; + cairo_gl_context_t *ctx; + cairo_image_surface_t *image; + cairo_bool_t src_is_gl_surface = FALSE; + cairo_rectangle_int_t map_extents; + + if (_src->type == CAIRO_PATTERN_TYPE_SURFACE) { + cairo_surface_t* src_surface = ((cairo_surface_pattern_t *) _src)->surface; + src_is_gl_surface = src_surface->type == CAIRO_SURFACE_TYPE_GL; + } + + status = _cairo_gl_context_acquire (dst->base.device, &ctx); + if (unlikely (status)) + return status; + + surface = (cairo_gl_surface_t *) + _cairo_gl_surface_create_scratch (ctx, + CAIRO_CONTENT_COLOR_ALPHA, + extents->width, extents->height); + map_extents = *extents; + map_extents.x = map_extents.y = 0; + image = _cairo_surface_map_to_image (&surface->base, &map_extents); + + /* If the pattern is a GL surface, it belongs to some other GL context, + so we need to release this device while we paint it to the image. */ + if (src_is_gl_surface) { + status = _cairo_gl_context_release (ctx, status); + if (unlikely (status)) { + _cairo_surface_unmap_image (&surface->base, image); + goto fail; + } + } + + status = _cairo_surface_offset_paint (&image->base, extents->x, extents->y, + CAIRO_OPERATOR_SOURCE, _src, NULL); + + if (src_is_gl_surface) { + status = _cairo_gl_context_acquire (dst->base.device, &ctx); + if (unlikely (status)) { + _cairo_surface_unmap_image (&surface->base, image); + goto fail; + } + } + + status = _cairo_surface_unmap_image (&surface->base, image); + status = _cairo_gl_context_release (ctx, status); + if (unlikely (status)) + goto fail; + + *operand = surface->operand; + operand->texture.owns_surface = surface; + operand->texture.attributes.matrix.x0 -= extents->x * operand->texture.attributes.matrix.xx; + operand->texture.attributes.matrix.y0 -= extents->y * operand->texture.attributes.matrix.yy; + return CAIRO_STATUS_SUCCESS; + +fail: + cairo_surface_destroy (&surface->base); + return status; +} + +void +_cairo_gl_solid_operand_init (cairo_gl_operand_t *operand, + const cairo_color_t *color) +{ + operand->type = CAIRO_GL_OPERAND_CONSTANT; + operand->constant.color[0] = color->red * color->alpha; + operand->constant.color[1] = color->green * color->alpha; + operand->constant.color[2] = color->blue * color->alpha; + operand->constant.color[3] = color->alpha; +} + +void +_cairo_gl_operand_translate (cairo_gl_operand_t *operand, + double tx, double ty) +{ + switch (operand->type) { + case CAIRO_GL_OPERAND_TEXTURE: + operand->texture.attributes.matrix.x0 -= tx * operand->texture.attributes.matrix.xx; + operand->texture.attributes.matrix.y0 -= ty * operand->texture.attributes.matrix.yy; + break; + + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + operand->gradient.m.x0 -= tx * operand->gradient.m.xx; + operand->gradient.m.y0 -= ty * operand->gradient.m.yy; + break; + + case CAIRO_GL_OPERAND_NONE: + case CAIRO_GL_OPERAND_CONSTANT: + case CAIRO_GL_OPERAND_COUNT: + default: + break; + } +} + +static cairo_status_t +_cairo_gl_gradient_operand_init (cairo_gl_operand_t *operand, + const cairo_pattern_t *pattern, + cairo_gl_surface_t *dst, + cairo_bool_t use_texgen) +{ + const cairo_gradient_pattern_t *gradient = (const cairo_gradient_pattern_t *)pattern; + cairo_status_t status; + + assert (gradient->base.type == CAIRO_PATTERN_TYPE_LINEAR || + gradient->base.type == CAIRO_PATTERN_TYPE_RADIAL); + + if (! _cairo_gl_device_has_glsl (dst->base.device)) + return CAIRO_INT_STATUS_UNSUPPORTED; + + status = _cairo_gl_create_gradient_texture (dst, + gradient, + &operand->gradient.gradient); + if (unlikely (status)) + return status; + + if (gradient->base.type == CAIRO_PATTERN_TYPE_LINEAR) { + cairo_linear_pattern_t *linear = (cairo_linear_pattern_t *) gradient; + double x0, y0, dx, dy, sf, offset; + + dx = linear->pd2.x - linear->pd1.x; + dy = linear->pd2.y - linear->pd1.y; + sf = 1.0 / (dx * dx + dy * dy); + dx *= sf; + dy *= sf; + + x0 = linear->pd1.x; + y0 = linear->pd1.y; + offset = dx * x0 + dy * y0; + + operand->type = CAIRO_GL_OPERAND_LINEAR_GRADIENT; + + cairo_matrix_init (&operand->gradient.m, dx, 0, dy, 1, -offset, 0); + if (! _cairo_matrix_is_identity (&pattern->matrix)) { + cairo_matrix_multiply (&operand->gradient.m, + &pattern->matrix, + &operand->gradient.m); + } + } else { + cairo_matrix_t m; + cairo_circle_double_t circles[2]; + double x0, y0, r0, dx, dy, dr; + + /* + * Some fragment shader implementations use half-floats to + * represent numbers, so the maximum number they can represent + * is about 2^14. Some intermediate computations used in the + * radial gradient shaders can produce results of up to 2*k^4. + * Setting k=8 makes the maximum result about 8192 (assuming + * that the extreme circles are not much smaller than the + * destination image). + */ + _cairo_gradient_pattern_fit_to_range (gradient, 8., + &operand->gradient.m, circles); + + x0 = circles[0].center.x; + y0 = circles[0].center.y; + r0 = circles[0].radius; + dx = circles[1].center.x - x0; + dy = circles[1].center.y - y0; + dr = circles[1].radius - r0; + + operand->gradient.a = dx * dx + dy * dy - dr * dr; + operand->gradient.radius_0 = r0; + operand->gradient.circle_d.center.x = dx; + operand->gradient.circle_d.center.y = dy; + operand->gradient.circle_d.radius = dr; + + if (operand->gradient.a == 0) + operand->type = CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0; + else if (pattern->extend == CAIRO_EXTEND_NONE) + operand->type = CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE; + else + operand->type = CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT; + + cairo_matrix_init_translate (&m, -x0, -y0); + cairo_matrix_multiply (&operand->gradient.m, + &operand->gradient.m, + &m); + } + + operand->gradient.extend = pattern->extend; + operand->gradient.texgen = use_texgen; + + return CAIRO_STATUS_SUCCESS; +} + +void +_cairo_gl_operand_copy (cairo_gl_operand_t *dst, + const cairo_gl_operand_t *src) +{ + *dst = *src; + switch (dst->type) { + case CAIRO_GL_OPERAND_CONSTANT: + break; + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + _cairo_gl_gradient_reference (dst->gradient.gradient); + break; + case CAIRO_GL_OPERAND_TEXTURE: + cairo_surface_reference (&dst->texture.owns_surface->base); + break; + default: + case CAIRO_GL_OPERAND_COUNT: + ASSERT_NOT_REACHED; + case CAIRO_GL_OPERAND_NONE: + break; + } +} + +void +_cairo_gl_operand_destroy (cairo_gl_operand_t *operand) +{ + switch (operand->type) { + case CAIRO_GL_OPERAND_CONSTANT: + break; + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + _cairo_gl_gradient_destroy (operand->gradient.gradient); + break; + case CAIRO_GL_OPERAND_TEXTURE: + cairo_surface_destroy (&operand->texture.owns_surface->base); + break; + default: + case CAIRO_GL_OPERAND_COUNT: + ASSERT_NOT_REACHED; + case CAIRO_GL_OPERAND_NONE: + break; + } + + operand->type = CAIRO_GL_OPERAND_NONE; +} + +cairo_int_status_t +_cairo_gl_operand_init (cairo_gl_operand_t *operand, + const cairo_pattern_t *pattern, + cairo_gl_surface_t *dst, + const cairo_rectangle_int_t *sample, + const cairo_rectangle_int_t *extents, + cairo_bool_t use_texgen) +{ + cairo_int_status_t status; + + TRACE ((stderr, "%s: type=%d\n", __FUNCTION__, pattern->type)); + switch (pattern->type) { + case CAIRO_PATTERN_TYPE_SOLID: + _cairo_gl_solid_operand_init (operand, + &((cairo_solid_pattern_t *) pattern)->color); + return CAIRO_STATUS_SUCCESS; + case CAIRO_PATTERN_TYPE_SURFACE: + status = _cairo_gl_surface_operand_init (operand, pattern, dst, + sample, extents, use_texgen); + if (status == CAIRO_INT_STATUS_UNSUPPORTED) + break; + + return status; + + case CAIRO_PATTERN_TYPE_LINEAR: + case CAIRO_PATTERN_TYPE_RADIAL: + status = _cairo_gl_gradient_operand_init (operand, pattern, dst, + use_texgen); + if (status == CAIRO_INT_STATUS_UNSUPPORTED) + break; + + return status; + + default: + case CAIRO_PATTERN_TYPE_MESH: + case CAIRO_PATTERN_TYPE_RASTER_SOURCE: + break; + } + + return _cairo_gl_pattern_texture_setup (operand, pattern, dst, extents); +} + +cairo_filter_t +_cairo_gl_operand_get_filter (cairo_gl_operand_t *operand) +{ + cairo_filter_t filter; + + switch ((int) operand->type) { + case CAIRO_GL_OPERAND_TEXTURE: + filter = operand->texture.attributes.filter; + break; + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + filter = CAIRO_FILTER_BILINEAR; + break; + default: + filter = CAIRO_FILTER_DEFAULT; + break; + } + + return filter; +} + +GLint +_cairo_gl_operand_get_gl_filter (cairo_gl_operand_t *operand) +{ + cairo_filter_t filter = _cairo_gl_operand_get_filter (operand); + + return filter != CAIRO_FILTER_FAST && filter != CAIRO_FILTER_NEAREST ? + GL_LINEAR : + GL_NEAREST; +} + +cairo_extend_t +_cairo_gl_operand_get_extend (cairo_gl_operand_t *operand) +{ + cairo_extend_t extend; + + switch ((int) operand->type) { + case CAIRO_GL_OPERAND_TEXTURE: + extend = operand->texture.attributes.extend; + break; + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + extend = operand->gradient.extend; + break; + default: + extend = CAIRO_EXTEND_NONE; + break; + } + + return extend; +} + + +void +_cairo_gl_operand_bind_to_shader (cairo_gl_context_t *ctx, + cairo_gl_operand_t *operand, + cairo_gl_tex_t tex_unit) +{ + const cairo_matrix_t *texgen = NULL; + + switch (operand->type) { + default: + case CAIRO_GL_OPERAND_COUNT: + ASSERT_NOT_REACHED; + case CAIRO_GL_OPERAND_NONE: + return; + + case CAIRO_GL_OPERAND_CONSTANT: + _cairo_gl_shader_bind_vec4 (ctx, + ctx->current_shader->constant_location[tex_unit], + operand->constant.color[0], + operand->constant.color[1], + operand->constant.color[2], + operand->constant.color[3]); + return; + + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + _cairo_gl_shader_bind_float (ctx, + ctx->current_shader->a_location[tex_unit], + operand->gradient.a); + /* fall through */ + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + _cairo_gl_shader_bind_vec3 (ctx, + ctx->current_shader->circle_d_location[tex_unit], + operand->gradient.circle_d.center.x, + operand->gradient.circle_d.center.y, + operand->gradient.circle_d.radius); + _cairo_gl_shader_bind_float (ctx, + ctx->current_shader->radius_0_location[tex_unit], + operand->gradient.radius_0); + /* fall through */ + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_TEXTURE: + /* + * For GLES2 we use shaders to implement GL_CLAMP_TO_BORDER (used + * with CAIRO_EXTEND_NONE). When bilinear filtering is enabled, + * these shaders need the texture dimensions for their calculations. + */ + if ((ctx->gl_flavor == CAIRO_GL_FLAVOR_ES3 || + ctx->gl_flavor == CAIRO_GL_FLAVOR_ES2) && + _cairo_gl_operand_get_extend (operand) == CAIRO_EXTEND_NONE && + _cairo_gl_operand_get_gl_filter (operand) == GL_LINEAR) + { + float width, height; + if (operand->type == CAIRO_GL_OPERAND_TEXTURE) { + width = operand->texture.surface->width; + height = operand->texture.surface->height; + } + else { + width = operand->gradient.gradient->cache_entry.size, + height = 1; + } + _cairo_gl_shader_bind_vec2 (ctx, + ctx->current_shader->texdims_location[tex_unit], + width, height); + } + break; + } + + if (operand->type == CAIRO_GL_OPERAND_TEXTURE) { + if (operand->texture.texgen) + texgen = &operand->texture.attributes.matrix; + } else { + if (operand->gradient.texgen) + texgen = &operand->gradient.m; + } + if (texgen) { + _cairo_gl_shader_bind_matrix(ctx, + ctx->current_shader->texgen_location[tex_unit], + texgen); + } +} + + +cairo_bool_t +_cairo_gl_operand_needs_setup (cairo_gl_operand_t *dest, + cairo_gl_operand_t *source, + unsigned int vertex_offset) +{ + if (dest->type != source->type) + return TRUE; + if (dest->vertex_offset != vertex_offset) + return TRUE; + + switch (source->type) { + case CAIRO_GL_OPERAND_NONE: + return FALSE; + case CAIRO_GL_OPERAND_CONSTANT: + return dest->constant.color[0] != source->constant.color[0] || + dest->constant.color[1] != source->constant.color[1] || + dest->constant.color[2] != source->constant.color[2] || + dest->constant.color[3] != source->constant.color[3]; + case CAIRO_GL_OPERAND_TEXTURE: + return dest->texture.surface != source->texture.surface || + dest->texture.attributes.extend != source->texture.attributes.extend || + dest->texture.attributes.filter != source->texture.attributes.filter || + dest->texture.attributes.has_component_alpha != source->texture.attributes.has_component_alpha; + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + /* XXX: improve this */ + return TRUE; + default: + case CAIRO_GL_OPERAND_COUNT: + ASSERT_NOT_REACHED; + break; + } + return TRUE; +} + +unsigned int +_cairo_gl_operand_get_vertex_size (const cairo_gl_operand_t *operand) +{ + switch (operand->type) { + default: + case CAIRO_GL_OPERAND_COUNT: + ASSERT_NOT_REACHED; + case CAIRO_GL_OPERAND_NONE: + case CAIRO_GL_OPERAND_CONSTANT: + return 0; + case CAIRO_GL_OPERAND_TEXTURE: + return operand->texture.texgen ? 0 : 2 * sizeof (GLfloat); + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + return operand->gradient.texgen ? 0 : 2 * sizeof (GLfloat); + } +} + +void +_cairo_gl_operand_emit (cairo_gl_operand_t *operand, + GLfloat ** vb, + GLfloat x, + GLfloat y) +{ + switch (operand->type) { + default: + case CAIRO_GL_OPERAND_COUNT: + ASSERT_NOT_REACHED; + case CAIRO_GL_OPERAND_NONE: + case CAIRO_GL_OPERAND_CONSTANT: + break; + case CAIRO_GL_OPERAND_LINEAR_GRADIENT: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_A0: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_NONE: + case CAIRO_GL_OPERAND_RADIAL_GRADIENT_EXT: + if (! operand->gradient.texgen) { + double s = x; + double t = y; + + cairo_matrix_transform_point (&operand->gradient.m, &s, &t); + + *(*vb)++ = s; + *(*vb)++ = t; + } + break; + case CAIRO_GL_OPERAND_TEXTURE: + if (! operand->texture.texgen) { + cairo_surface_attributes_t *src_attributes = &operand->texture.attributes; + double s = x; + double t = y; + + cairo_matrix_transform_point (&src_attributes->matrix, &s, &t); + *(*vb)++ = s; + *(*vb)++ = t; + } + break; + } +} |