diff options
Diffstat (limited to 'gfx/cairo/libpixman/src/pixman-bits-image.c')
| -rw-r--r-- | gfx/cairo/libpixman/src/pixman-bits-image.c | 1849 |
1 files changed, 1849 insertions, 0 deletions
diff --git a/gfx/cairo/libpixman/src/pixman-bits-image.c b/gfx/cairo/libpixman/src/pixman-bits-image.c new file mode 100644 index 000000000..e9d2fb69c --- /dev/null +++ b/gfx/cairo/libpixman/src/pixman-bits-image.c @@ -0,0 +1,1849 @@ +/* + * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc. + * 2005 Lars Knoll & Zack Rusin, Trolltech + * 2008 Aaron Plattner, NVIDIA Corporation + * Copyright © 2000 SuSE, Inc. + * Copyright © 2007, 2009 Red Hat, Inc. + * Copyright © 2008 André Tupinambá <andrelrt@gmail.com> + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Keith Packard not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. Keith Packard makes no + * representations about the suitability of this software for any purpose. It + * is provided "as is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "pixman-private.h" +#include "pixman-combine32.h" +#include "pixman-inlines.h" + +static uint32_t * +_pixman_image_get_scanline_generic_float (pixman_iter_t * iter, + const uint32_t *mask) +{ + pixman_iter_get_scanline_t fetch_32 = iter->data; + uint32_t *buffer = iter->buffer; + + fetch_32 (iter, NULL); + + pixman_expand_to_float ((argb_t *)buffer, buffer, PIXMAN_a8r8g8b8, iter->width); + + return iter->buffer; +} + +/* Fetch functions */ + +static force_inline uint32_t +fetch_pixel_no_alpha (bits_image_t *image, + int x, int y, pixman_bool_t check_bounds) +{ + if (check_bounds && + (x < 0 || x >= image->width || y < 0 || y >= image->height)) + { + return 0; + } + + return image->fetch_pixel_32 (image, x, y); +} + +typedef uint32_t (* get_pixel_t) (bits_image_t *image, + int x, int y, pixman_bool_t check_bounds); + +static force_inline uint32_t +bits_image_fetch_pixel_nearest (bits_image_t *image, + pixman_fixed_t x, + pixman_fixed_t y, + get_pixel_t get_pixel) +{ + int x0 = pixman_fixed_to_int (x - pixman_fixed_e); + int y0 = pixman_fixed_to_int (y - pixman_fixed_e); + + if (image->common.repeat != PIXMAN_REPEAT_NONE) + { + repeat (image->common.repeat, &x0, image->width); + repeat (image->common.repeat, &y0, image->height); + + return get_pixel (image, x0, y0, FALSE); + } + else + { + return get_pixel (image, x0, y0, TRUE); + } +} + +static force_inline uint32_t +bits_image_fetch_pixel_bilinear (bits_image_t *image, + pixman_fixed_t x, + pixman_fixed_t y, + get_pixel_t get_pixel) +{ + pixman_repeat_t repeat_mode = image->common.repeat; + int width = image->width; + int height = image->height; + int x1, y1, x2, y2; + uint32_t tl, tr, bl, br; + int32_t distx, disty; + + x1 = x - pixman_fixed_1 / 2; + y1 = y - pixman_fixed_1 / 2; + + distx = pixman_fixed_to_bilinear_weight (x1); + disty = pixman_fixed_to_bilinear_weight (y1); + + x1 = pixman_fixed_to_int (x1); + y1 = pixman_fixed_to_int (y1); + x2 = x1 + 1; + y2 = y1 + 1; + + if (repeat_mode != PIXMAN_REPEAT_NONE) + { + repeat (repeat_mode, &x1, width); + repeat (repeat_mode, &y1, height); + repeat (repeat_mode, &x2, width); + repeat (repeat_mode, &y2, height); + + tl = get_pixel (image, x1, y1, FALSE); + bl = get_pixel (image, x1, y2, FALSE); + tr = get_pixel (image, x2, y1, FALSE); + br = get_pixel (image, x2, y2, FALSE); + } + else + { + tl = get_pixel (image, x1, y1, TRUE); + tr = get_pixel (image, x2, y1, TRUE); + bl = get_pixel (image, x1, y2, TRUE); + br = get_pixel (image, x2, y2, TRUE); + } + + return bilinear_interpolation (tl, tr, bl, br, distx, disty); +} + +static uint32_t * +bits_image_fetch_bilinear_no_repeat_8888 (pixman_iter_t *iter, + const uint32_t *mask) +{ + + pixman_image_t * ima = iter->image; + int offset = iter->x; + int line = iter->y++; + int width = iter->width; + uint32_t * buffer = iter->buffer; + + bits_image_t *bits = &ima->bits; + pixman_fixed_t x_top, x_bottom, x; + pixman_fixed_t ux_top, ux_bottom, ux; + pixman_vector_t v; + uint32_t top_mask, bottom_mask; + uint32_t *top_row; + uint32_t *bottom_row; + uint32_t *end; + uint32_t zero[2] = { 0, 0 }; + uint32_t one = 1; + int y, y1, y2; + int disty; + int mask_inc; + int w; + + /* reference point is the center of the pixel */ + v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; + v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; + v.vector[2] = pixman_fixed_1; + + if (!pixman_transform_point_3d (bits->common.transform, &v)) + return iter->buffer; + + ux = ux_top = ux_bottom = bits->common.transform->matrix[0][0]; + x = x_top = x_bottom = v.vector[0] - pixman_fixed_1/2; + + y = v.vector[1] - pixman_fixed_1/2; + disty = pixman_fixed_to_bilinear_weight (y); + + /* Load the pointers to the first and second lines from the source + * image that bilinear code must read. + * + * The main trick in this code is about the check if any line are + * outside of the image; + * + * When I realize that a line (any one) is outside, I change + * the pointer to a dummy area with zeros. Once I change this, I + * must be sure the pointer will not change, so I set the + * variables to each pointer increments inside the loop. + */ + y1 = pixman_fixed_to_int (y); + y2 = y1 + 1; + + if (y1 < 0 || y1 >= bits->height) + { + top_row = zero; + x_top = 0; + ux_top = 0; + } + else + { + top_row = bits->bits + y1 * bits->rowstride; + x_top = x; + ux_top = ux; + } + + if (y2 < 0 || y2 >= bits->height) + { + bottom_row = zero; + x_bottom = 0; + ux_bottom = 0; + } + else + { + bottom_row = bits->bits + y2 * bits->rowstride; + x_bottom = x; + ux_bottom = ux; + } + + /* Instead of checking whether the operation uses the mast in + * each loop iteration, verify this only once and prepare the + * variables to make the code smaller inside the loop. + */ + if (!mask) + { + mask_inc = 0; + mask = &one; + } + else + { + /* If have a mask, prepare the variables to check it */ + mask_inc = 1; + } + + /* If both are zero, then the whole thing is zero */ + if (top_row == zero && bottom_row == zero) + { + memset (buffer, 0, width * sizeof (uint32_t)); + return iter->buffer; + } + else if (bits->format == PIXMAN_x8r8g8b8) + { + if (top_row == zero) + { + top_mask = 0; + bottom_mask = 0xff000000; + } + else if (bottom_row == zero) + { + top_mask = 0xff000000; + bottom_mask = 0; + } + else + { + top_mask = 0xff000000; + bottom_mask = 0xff000000; + } + } + else + { + top_mask = 0; + bottom_mask = 0; + } + + end = buffer + width; + + /* Zero fill to the left of the image */ + while (buffer < end && x < pixman_fixed_minus_1) + { + *buffer++ = 0; + x += ux; + x_top += ux_top; + x_bottom += ux_bottom; + mask += mask_inc; + } + + /* Left edge + */ + while (buffer < end && x < 0) + { + uint32_t tr, br; + int32_t distx; + + tr = top_row[pixman_fixed_to_int (x_top) + 1] | top_mask; + br = bottom_row[pixman_fixed_to_int (x_bottom) + 1] | bottom_mask; + + distx = pixman_fixed_to_bilinear_weight (x); + + *buffer++ = bilinear_interpolation (0, tr, 0, br, distx, disty); + + x += ux; + x_top += ux_top; + x_bottom += ux_bottom; + mask += mask_inc; + } + + /* Main part */ + w = pixman_int_to_fixed (bits->width - 1); + + while (buffer < end && x < w) + { + if (*mask) + { + uint32_t tl, tr, bl, br; + int32_t distx; + + tl = top_row [pixman_fixed_to_int (x_top)] | top_mask; + tr = top_row [pixman_fixed_to_int (x_top) + 1] | top_mask; + bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask; + br = bottom_row [pixman_fixed_to_int (x_bottom) + 1] | bottom_mask; + + distx = pixman_fixed_to_bilinear_weight (x); + + *buffer = bilinear_interpolation (tl, tr, bl, br, distx, disty); + } + + buffer++; + x += ux; + x_top += ux_top; + x_bottom += ux_bottom; + mask += mask_inc; + } + + /* Right Edge */ + w = pixman_int_to_fixed (bits->width); + while (buffer < end && x < w) + { + if (*mask) + { + uint32_t tl, bl; + int32_t distx; + + tl = top_row [pixman_fixed_to_int (x_top)] | top_mask; + bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask; + + distx = pixman_fixed_to_bilinear_weight (x); + + *buffer = bilinear_interpolation (tl, 0, bl, 0, distx, disty); + } + + buffer++; + x += ux; + x_top += ux_top; + x_bottom += ux_bottom; + mask += mask_inc; + } + + /* Zero fill to the left of the image */ + while (buffer < end) + *buffer++ = 0; + + return iter->buffer; +} + +static force_inline uint32_t +bits_image_fetch_pixel_convolution (bits_image_t *image, + pixman_fixed_t x, + pixman_fixed_t y, + get_pixel_t get_pixel) +{ + pixman_fixed_t *params = image->common.filter_params; + int x_off = (params[0] - pixman_fixed_1) >> 1; + int y_off = (params[1] - pixman_fixed_1) >> 1; + int32_t cwidth = pixman_fixed_to_int (params[0]); + int32_t cheight = pixman_fixed_to_int (params[1]); + int32_t i, j, x1, x2, y1, y2; + pixman_repeat_t repeat_mode = image->common.repeat; + int width = image->width; + int height = image->height; + int srtot, sgtot, sbtot, satot; + + params += 2; + + x1 = pixman_fixed_to_int (x - pixman_fixed_e - x_off); + y1 = pixman_fixed_to_int (y - pixman_fixed_e - y_off); + x2 = x1 + cwidth; + y2 = y1 + cheight; + + srtot = sgtot = sbtot = satot = 0; + + for (i = y1; i < y2; ++i) + { + for (j = x1; j < x2; ++j) + { + int rx = j; + int ry = i; + + pixman_fixed_t f = *params; + + if (f) + { + uint32_t pixel; + + if (repeat_mode != PIXMAN_REPEAT_NONE) + { + repeat (repeat_mode, &rx, width); + repeat (repeat_mode, &ry, height); + + pixel = get_pixel (image, rx, ry, FALSE); + } + else + { + pixel = get_pixel (image, rx, ry, TRUE); + } + + srtot += (int)RED_8 (pixel) * f; + sgtot += (int)GREEN_8 (pixel) * f; + sbtot += (int)BLUE_8 (pixel) * f; + satot += (int)ALPHA_8 (pixel) * f; + } + + params++; + } + } + + satot = (satot + 0x8000) >> 16; + srtot = (srtot + 0x8000) >> 16; + sgtot = (sgtot + 0x8000) >> 16; + sbtot = (sbtot + 0x8000) >> 16; + + satot = CLIP (satot, 0, 0xff); + srtot = CLIP (srtot, 0, 0xff); + sgtot = CLIP (sgtot, 0, 0xff); + sbtot = CLIP (sbtot, 0, 0xff); + + return ((satot << 24) | (srtot << 16) | (sgtot << 8) | (sbtot)); +} + +static uint32_t +bits_image_fetch_pixel_separable_convolution (bits_image_t *image, + pixman_fixed_t x, + pixman_fixed_t y, + get_pixel_t get_pixel) +{ + pixman_fixed_t *params = image->common.filter_params; + pixman_repeat_t repeat_mode = image->common.repeat; + int width = image->width; + int height = image->height; + int cwidth = pixman_fixed_to_int (params[0]); + int cheight = pixman_fixed_to_int (params[1]); + int x_phase_bits = pixman_fixed_to_int (params[2]); + int y_phase_bits = pixman_fixed_to_int (params[3]); + int x_phase_shift = 16 - x_phase_bits; + int y_phase_shift = 16 - y_phase_bits; + int x_off = ((cwidth << 16) - pixman_fixed_1) >> 1; + int y_off = ((cheight << 16) - pixman_fixed_1) >> 1; + pixman_fixed_t *y_params; + int srtot, sgtot, sbtot, satot; + int32_t x1, x2, y1, y2; + int32_t px, py; + int i, j; + + /* Round x and y to the middle of the closest phase before continuing. This + * ensures that the convolution matrix is aligned right, since it was + * positioned relative to a particular phase (and not relative to whatever + * exact fraction we happen to get here). + */ + x = ((x >> x_phase_shift) << x_phase_shift) + ((1 << x_phase_shift) >> 1); + y = ((y >> y_phase_shift) << y_phase_shift) + ((1 << y_phase_shift) >> 1); + + px = (x & 0xffff) >> x_phase_shift; + py = (y & 0xffff) >> y_phase_shift; + + y_params = params + 4 + (1 << x_phase_bits) * cwidth + py * cheight; + + x1 = pixman_fixed_to_int (x - pixman_fixed_e - x_off); + y1 = pixman_fixed_to_int (y - pixman_fixed_e - y_off); + x2 = x1 + cwidth; + y2 = y1 + cheight; + + srtot = sgtot = sbtot = satot = 0; + + for (i = y1; i < y2; ++i) + { + pixman_fixed_48_16_t fy = *y_params++; + pixman_fixed_t *x_params = params + 4 + px * cwidth; + + if (fy) + { + for (j = x1; j < x2; ++j) + { + pixman_fixed_t fx = *x_params++; + int rx = j; + int ry = i; + + if (fx) + { + pixman_fixed_t f; + uint32_t pixel; + + if (repeat_mode != PIXMAN_REPEAT_NONE) + { + repeat (repeat_mode, &rx, width); + repeat (repeat_mode, &ry, height); + + pixel = get_pixel (image, rx, ry, FALSE); + } + else + { + pixel = get_pixel (image, rx, ry, TRUE); + } + + f = (fy * fx + 0x8000) >> 16; + + srtot += (int)RED_8 (pixel) * f; + sgtot += (int)GREEN_8 (pixel) * f; + sbtot += (int)BLUE_8 (pixel) * f; + satot += (int)ALPHA_8 (pixel) * f; + } + } + } + } + + satot = (satot + 0x8000) >> 16; + srtot = (srtot + 0x8000) >> 16; + sgtot = (sgtot + 0x8000) >> 16; + sbtot = (sbtot + 0x8000) >> 16; + + satot = CLIP (satot, 0, 0xff); + srtot = CLIP (srtot, 0, 0xff); + sgtot = CLIP (sgtot, 0, 0xff); + sbtot = CLIP (sbtot, 0, 0xff); + + return ((satot << 24) | (srtot << 16) | (sgtot << 8) | (sbtot)); +} + +static force_inline uint32_t +bits_image_fetch_pixel_filtered (bits_image_t *image, + pixman_fixed_t x, + pixman_fixed_t y, + get_pixel_t get_pixel) +{ + switch (image->common.filter) + { + case PIXMAN_FILTER_NEAREST: + case PIXMAN_FILTER_FAST: + return bits_image_fetch_pixel_nearest (image, x, y, get_pixel); + break; + + case PIXMAN_FILTER_BILINEAR: + case PIXMAN_FILTER_GOOD: + case PIXMAN_FILTER_BEST: + return bits_image_fetch_pixel_bilinear (image, x, y, get_pixel); + break; + + case PIXMAN_FILTER_CONVOLUTION: + return bits_image_fetch_pixel_convolution (image, x, y, get_pixel); + break; + + case PIXMAN_FILTER_SEPARABLE_CONVOLUTION: + return bits_image_fetch_pixel_separable_convolution (image, x, y, get_pixel); + break; + + default: + break; + } + + return 0; +} + +static uint32_t * +bits_image_fetch_affine_no_alpha (pixman_iter_t * iter, + const uint32_t * mask) +{ + pixman_image_t *image = iter->image; + int offset = iter->x; + int line = iter->y++; + int width = iter->width; + uint32_t * buffer = iter->buffer; + + pixman_fixed_t x, y; + pixman_fixed_t ux, uy; + pixman_vector_t v; + int i; + + /* reference point is the center of the pixel */ + v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; + v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; + v.vector[2] = pixman_fixed_1; + + if (image->common.transform) + { + if (!pixman_transform_point_3d (image->common.transform, &v)) + return iter->buffer; + + ux = image->common.transform->matrix[0][0]; + uy = image->common.transform->matrix[1][0]; + } + else + { + ux = pixman_fixed_1; + uy = 0; + } + + x = v.vector[0]; + y = v.vector[1]; + + for (i = 0; i < width; ++i) + { + if (!mask || mask[i]) + { + buffer[i] = bits_image_fetch_pixel_filtered ( + &image->bits, x, y, fetch_pixel_no_alpha); + } + + x += ux; + y += uy; + } + + return buffer; +} + +/* General fetcher */ +static force_inline uint32_t +fetch_pixel_general (bits_image_t *image, int x, int y, pixman_bool_t check_bounds) +{ + uint32_t pixel; + + if (check_bounds && + (x < 0 || x >= image->width || y < 0 || y >= image->height)) + { + return 0; + } + + pixel = image->fetch_pixel_32 (image, x, y); + + if (image->common.alpha_map) + { + uint32_t pixel_a; + + x -= image->common.alpha_origin_x; + y -= image->common.alpha_origin_y; + + if (x < 0 || x >= image->common.alpha_map->width || + y < 0 || y >= image->common.alpha_map->height) + { + pixel_a = 0; + } + else + { + pixel_a = image->common.alpha_map->fetch_pixel_32 ( + image->common.alpha_map, x, y); + + pixel_a = ALPHA_8 (pixel_a); + } + + pixel &= 0x00ffffff; + pixel |= (pixel_a << 24); + } + + return pixel; +} + +static uint32_t * +bits_image_fetch_general (pixman_iter_t *iter, + const uint32_t *mask) +{ + pixman_image_t *image = iter->image; + int offset = iter->x; + int line = iter->y++; + int width = iter->width; + uint32_t * buffer = iter->buffer; + + pixman_fixed_t x, y, w; + pixman_fixed_t ux, uy, uw; + pixman_vector_t v; + int i; + + /* reference point is the center of the pixel */ + v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; + v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; + v.vector[2] = pixman_fixed_1; + + if (image->common.transform) + { + if (!pixman_transform_point_3d (image->common.transform, &v)) + return buffer; + + ux = image->common.transform->matrix[0][0]; + uy = image->common.transform->matrix[1][0]; + uw = image->common.transform->matrix[2][0]; + } + else + { + ux = pixman_fixed_1; + uy = 0; + uw = 0; + } + + x = v.vector[0]; + y = v.vector[1]; + w = v.vector[2]; + + for (i = 0; i < width; ++i) + { + pixman_fixed_t x0, y0; + + if (!mask || mask[i]) + { + if (w != 0) + { + x0 = ((pixman_fixed_48_16_t)x << 16) / w; + y0 = ((pixman_fixed_48_16_t)y << 16) / w; + } + else + { + x0 = 0; + y0 = 0; + } + + buffer[i] = bits_image_fetch_pixel_filtered ( + &image->bits, x0, y0, fetch_pixel_general); + } + + x += ux; + y += uy; + w += uw; + } + + return buffer; +} + +typedef uint32_t (* convert_pixel_t) (const uint8_t *row, int x); + +static force_inline void +bits_image_fetch_separable_convolution_affine (pixman_image_t * image, + int offset, + int line, + int width, + uint32_t * buffer, + const uint32_t * mask, + + convert_pixel_t convert_pixel, + pixman_format_code_t format, + pixman_repeat_t repeat_mode) +{ + bits_image_t *bits = &image->bits; + pixman_fixed_t *params = image->common.filter_params; + int cwidth = pixman_fixed_to_int (params[0]); + int cheight = pixman_fixed_to_int (params[1]); + int x_off = ((cwidth << 16) - pixman_fixed_1) >> 1; + int y_off = ((cheight << 16) - pixman_fixed_1) >> 1; + int x_phase_bits = pixman_fixed_to_int (params[2]); + int y_phase_bits = pixman_fixed_to_int (params[3]); + int x_phase_shift = 16 - x_phase_bits; + int y_phase_shift = 16 - y_phase_bits; + pixman_fixed_t vx, vy; + pixman_fixed_t ux, uy; + pixman_vector_t v; + int k; + + /* reference point is the center of the pixel */ + v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; + v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; + v.vector[2] = pixman_fixed_1; + + if (!pixman_transform_point_3d (image->common.transform, &v)) + return; + + ux = image->common.transform->matrix[0][0]; + uy = image->common.transform->matrix[1][0]; + + vx = v.vector[0]; + vy = v.vector[1]; + + for (k = 0; k < width; ++k) + { + pixman_fixed_t *y_params; + int satot, srtot, sgtot, sbtot; + pixman_fixed_t x, y; + int32_t x1, x2, y1, y2; + int32_t px, py; + int i, j; + + if (mask && !mask[k]) + goto next; + + /* Round x and y to the middle of the closest phase before continuing. This + * ensures that the convolution matrix is aligned right, since it was + * positioned relative to a particular phase (and not relative to whatever + * exact fraction we happen to get here). + */ + x = ((vx >> x_phase_shift) << x_phase_shift) + ((1 << x_phase_shift) >> 1); + y = ((vy >> y_phase_shift) << y_phase_shift) + ((1 << y_phase_shift) >> 1); + + px = (x & 0xffff) >> x_phase_shift; + py = (y & 0xffff) >> y_phase_shift; + + x1 = pixman_fixed_to_int (x - pixman_fixed_e - x_off); + y1 = pixman_fixed_to_int (y - pixman_fixed_e - y_off); + x2 = x1 + cwidth; + y2 = y1 + cheight; + + satot = srtot = sgtot = sbtot = 0; + + y_params = params + 4 + (1 << x_phase_bits) * cwidth + py * cheight; + + for (i = y1; i < y2; ++i) + { + pixman_fixed_t fy = *y_params++; + + if (fy) + { + pixman_fixed_t *x_params = params + 4 + px * cwidth; + + for (j = x1; j < x2; ++j) + { + pixman_fixed_t fx = *x_params++; + int rx = j; + int ry = i; + + if (fx) + { + pixman_fixed_t f; + uint32_t pixel, mask; + uint8_t *row; + + mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; + + if (repeat_mode != PIXMAN_REPEAT_NONE) + { + repeat (repeat_mode, &rx, bits->width); + repeat (repeat_mode, &ry, bits->height); + + row = (uint8_t *)bits->bits + bits->rowstride * 4 * ry; + pixel = convert_pixel (row, rx) | mask; + } + else + { + if (rx < 0 || ry < 0 || rx >= bits->width || ry >= bits->height) + { + pixel = 0; + } + else + { + row = (uint8_t *)bits->bits + bits->rowstride * 4 * ry; + pixel = convert_pixel (row, rx) | mask; + } + } + + f = ((pixman_fixed_32_32_t)fx * fy + 0x8000) >> 16; + srtot += (int)RED_8 (pixel) * f; + sgtot += (int)GREEN_8 (pixel) * f; + sbtot += (int)BLUE_8 (pixel) * f; + satot += (int)ALPHA_8 (pixel) * f; + } + } + } + } + + satot = (satot + 0x8000) >> 16; + srtot = (srtot + 0x8000) >> 16; + sgtot = (sgtot + 0x8000) >> 16; + sbtot = (sbtot + 0x8000) >> 16; + + satot = CLIP (satot, 0, 0xff); + srtot = CLIP (srtot, 0, 0xff); + sgtot = CLIP (sgtot, 0, 0xff); + sbtot = CLIP (sbtot, 0, 0xff); + + buffer[k] = (satot << 24) | (srtot << 16) | (sgtot << 8) | (sbtot << 0); + + next: + vx += ux; + vy += uy; + } +} + +static const uint8_t zero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; + +static force_inline void +bits_image_fetch_bilinear_affine (pixman_image_t * image, + int offset, + int line, + int width, + uint32_t * buffer, + const uint32_t * mask, + + convert_pixel_t convert_pixel, + pixman_format_code_t format, + pixman_repeat_t repeat_mode) +{ + pixman_fixed_t x, y; + pixman_fixed_t ux, uy; + pixman_vector_t v; + bits_image_t *bits = &image->bits; + int i; + + /* reference point is the center of the pixel */ + v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; + v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; + v.vector[2] = pixman_fixed_1; + + if (!pixman_transform_point_3d (image->common.transform, &v)) + return; + + ux = image->common.transform->matrix[0][0]; + uy = image->common.transform->matrix[1][0]; + + x = v.vector[0]; + y = v.vector[1]; + + for (i = 0; i < width; ++i) + { + int x1, y1, x2, y2; + uint32_t tl, tr, bl, br; + int32_t distx, disty; + int width = image->bits.width; + int height = image->bits.height; + const uint8_t *row1; + const uint8_t *row2; + + if (mask && !mask[i]) + goto next; + + x1 = x - pixman_fixed_1 / 2; + y1 = y - pixman_fixed_1 / 2; + + distx = pixman_fixed_to_bilinear_weight (x1); + disty = pixman_fixed_to_bilinear_weight (y1); + + y1 = pixman_fixed_to_int (y1); + y2 = y1 + 1; + x1 = pixman_fixed_to_int (x1); + x2 = x1 + 1; + + if (repeat_mode != PIXMAN_REPEAT_NONE) + { + uint32_t mask; + + mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; + + repeat (repeat_mode, &x1, width); + repeat (repeat_mode, &y1, height); + repeat (repeat_mode, &x2, width); + repeat (repeat_mode, &y2, height); + + row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1; + row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2; + + tl = convert_pixel (row1, x1) | mask; + tr = convert_pixel (row1, x2) | mask; + bl = convert_pixel (row2, x1) | mask; + br = convert_pixel (row2, x2) | mask; + } + else + { + uint32_t mask1, mask2; + int bpp; + + /* Note: PIXMAN_FORMAT_BPP() returns an unsigned value, + * which means if you use it in expressions, those + * expressions become unsigned themselves. Since + * the variables below can be negative in some cases, + * that will lead to crashes on 64 bit architectures. + * + * So this line makes sure bpp is signed + */ + bpp = PIXMAN_FORMAT_BPP (format); + + if (x1 >= width || x2 < 0 || y1 >= height || y2 < 0) + { + buffer[i] = 0; + goto next; + } + + if (y2 == 0) + { + row1 = zero; + mask1 = 0; + } + else + { + row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1; + row1 += bpp / 8 * x1; + + mask1 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; + } + + if (y1 == height - 1) + { + row2 = zero; + mask2 = 0; + } + else + { + row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2; + row2 += bpp / 8 * x1; + + mask2 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; + } + + if (x2 == 0) + { + tl = 0; + bl = 0; + } + else + { + tl = convert_pixel (row1, 0) | mask1; + bl = convert_pixel (row2, 0) | mask2; + } + + if (x1 == width - 1) + { + tr = 0; + br = 0; + } + else + { + tr = convert_pixel (row1, 1) | mask1; + br = convert_pixel (row2, 1) | mask2; + } + } + + buffer[i] = bilinear_interpolation ( + tl, tr, bl, br, distx, disty); + + next: + x += ux; + y += uy; + } +} + +static force_inline void +bits_image_fetch_nearest_affine (pixman_image_t * image, + int offset, + int line, + int width, + uint32_t * buffer, + const uint32_t * mask, + + convert_pixel_t convert_pixel, + pixman_format_code_t format, + pixman_repeat_t repeat_mode) +{ + pixman_fixed_t x, y; + pixman_fixed_t ux, uy; + pixman_vector_t v; + bits_image_t *bits = &image->bits; + int i; + + /* reference point is the center of the pixel */ + v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; + v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; + v.vector[2] = pixman_fixed_1; + + if (!pixman_transform_point_3d (image->common.transform, &v)) + return; + + ux = image->common.transform->matrix[0][0]; + uy = image->common.transform->matrix[1][0]; + + x = v.vector[0]; + y = v.vector[1]; + + for (i = 0; i < width; ++i) + { + int width, height, x0, y0; + const uint8_t *row; + + if (mask && !mask[i]) + goto next; + + width = image->bits.width; + height = image->bits.height; + x0 = pixman_fixed_to_int (x - pixman_fixed_e); + y0 = pixman_fixed_to_int (y - pixman_fixed_e); + + if (repeat_mode == PIXMAN_REPEAT_NONE && + (y0 < 0 || y0 >= height || x0 < 0 || x0 >= width)) + { + buffer[i] = 0; + } + else + { + uint32_t mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; + + if (repeat_mode != PIXMAN_REPEAT_NONE) + { + repeat (repeat_mode, &x0, width); + repeat (repeat_mode, &y0, height); + } + + row = (uint8_t *)bits->bits + bits->rowstride * 4 * y0; + + buffer[i] = convert_pixel (row, x0) | mask; + } + + next: + x += ux; + y += uy; + } +} + +static force_inline uint32_t +convert_a8r8g8b8 (const uint8_t *row, int x) +{ + return *(((uint32_t *)row) + x); +} + +static force_inline uint32_t +convert_x8r8g8b8 (const uint8_t *row, int x) +{ + return *(((uint32_t *)row) + x); +} + +static force_inline uint32_t +convert_a8 (const uint8_t *row, int x) +{ + return *(row + x) << 24; +} + +static force_inline uint32_t +convert_r5g6b5 (const uint8_t *row, int x) +{ + return convert_0565_to_0888 (*((uint16_t *)row + x)); +} + +#define MAKE_SEPARABLE_CONVOLUTION_FETCHER(name, format, repeat_mode) \ + static uint32_t * \ + bits_image_fetch_separable_convolution_affine_ ## name (pixman_iter_t *iter, \ + const uint32_t * mask) \ + { \ + bits_image_fetch_separable_convolution_affine ( \ + iter->image, \ + iter->x, iter->y++, \ + iter->width, \ + iter->buffer, mask, \ + convert_ ## format, \ + PIXMAN_ ## format, \ + repeat_mode); \ + \ + return iter->buffer; \ + } + +#define MAKE_BILINEAR_FETCHER(name, format, repeat_mode) \ + static uint32_t * \ + bits_image_fetch_bilinear_affine_ ## name (pixman_iter_t *iter, \ + const uint32_t * mask) \ + { \ + bits_image_fetch_bilinear_affine (iter->image, \ + iter->x, iter->y++, \ + iter->width, \ + iter->buffer, mask, \ + convert_ ## format, \ + PIXMAN_ ## format, \ + repeat_mode); \ + return iter->buffer; \ + } + +#define MAKE_NEAREST_FETCHER(name, format, repeat_mode) \ + static uint32_t * \ + bits_image_fetch_nearest_affine_ ## name (pixman_iter_t *iter, \ + const uint32_t * mask) \ + { \ + bits_image_fetch_nearest_affine (iter->image, \ + iter->x, iter->y++, \ + iter->width, \ + iter->buffer, mask, \ + convert_ ## format, \ + PIXMAN_ ## format, \ + repeat_mode); \ + return iter->buffer; \ + } + +#define MAKE_FETCHERS(name, format, repeat_mode) \ + MAKE_NEAREST_FETCHER (name, format, repeat_mode) \ + MAKE_BILINEAR_FETCHER (name, format, repeat_mode) \ + MAKE_SEPARABLE_CONVOLUTION_FETCHER (name, format, repeat_mode) + +MAKE_FETCHERS (pad_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_PAD) +MAKE_FETCHERS (none_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NONE) +MAKE_FETCHERS (reflect_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_REFLECT) +MAKE_FETCHERS (normal_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NORMAL) +MAKE_FETCHERS (pad_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_PAD) +MAKE_FETCHERS (none_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NONE) +MAKE_FETCHERS (reflect_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_REFLECT) +MAKE_FETCHERS (normal_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NORMAL) +MAKE_FETCHERS (pad_a8, a8, PIXMAN_REPEAT_PAD) +MAKE_FETCHERS (none_a8, a8, PIXMAN_REPEAT_NONE) +MAKE_FETCHERS (reflect_a8, a8, PIXMAN_REPEAT_REFLECT) +MAKE_FETCHERS (normal_a8, a8, PIXMAN_REPEAT_NORMAL) +MAKE_FETCHERS (pad_r5g6b5, r5g6b5, PIXMAN_REPEAT_PAD) +MAKE_FETCHERS (none_r5g6b5, r5g6b5, PIXMAN_REPEAT_NONE) +MAKE_FETCHERS (reflect_r5g6b5, r5g6b5, PIXMAN_REPEAT_REFLECT) +MAKE_FETCHERS (normal_r5g6b5, r5g6b5, PIXMAN_REPEAT_NORMAL) + +static void +replicate_pixel_32 (bits_image_t * bits, + int x, + int y, + int width, + uint32_t * buffer) +{ + uint32_t color; + uint32_t *end; + + color = bits->fetch_pixel_32 (bits, x, y); + + end = buffer + width; + while (buffer < end) + *(buffer++) = color; +} + +static void +replicate_pixel_float (bits_image_t * bits, + int x, + int y, + int width, + uint32_t * b) +{ + argb_t color; + argb_t *buffer = (argb_t *)b; + argb_t *end; + + color = bits->fetch_pixel_float (bits, x, y); + + end = buffer + width; + while (buffer < end) + *(buffer++) = color; +} + +static void +bits_image_fetch_untransformed_repeat_none (bits_image_t *image, + pixman_bool_t wide, + int x, + int y, + int width, + uint32_t * buffer) +{ + uint32_t w; + + if (y < 0 || y >= image->height) + { + memset (buffer, 0, width * (wide? sizeof (argb_t) : 4)); + return; + } + + if (x < 0) + { + w = MIN (width, -x); + + memset (buffer, 0, w * (wide ? sizeof (argb_t) : 4)); + + width -= w; + buffer += w * (wide? 4 : 1); + x += w; + } + + if (x < image->width) + { + w = MIN (width, image->width - x); + + if (wide) + image->fetch_scanline_float ((pixman_image_t *)image, x, y, w, buffer, NULL); + else + image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL); + + width -= w; + buffer += w * (wide? 4 : 1); + x += w; + } + + memset (buffer, 0, width * (wide ? sizeof (argb_t) : 4)); +} + +static void +bits_image_fetch_untransformed_repeat_normal (bits_image_t *image, + pixman_bool_t wide, + int x, + int y, + int width, + uint32_t * buffer) +{ + uint32_t w; + + while (y < 0) + y += image->height; + + while (y >= image->height) + y -= image->height; + + if (image->width == 1) + { + if (wide) + replicate_pixel_float (image, 0, y, width, buffer); + else + replicate_pixel_32 (image, 0, y, width, buffer); + + return; + } + + while (width) + { + while (x < 0) + x += image->width; + while (x >= image->width) + x -= image->width; + + w = MIN (width, image->width - x); + + if (wide) + image->fetch_scanline_float ((pixman_image_t *)image, x, y, w, buffer, NULL); + else + image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL); + + buffer += w * (wide? 4 : 1); + x += w; + width -= w; + } +} + +static uint32_t * +bits_image_fetch_untransformed_32 (pixman_iter_t * iter, + const uint32_t *mask) +{ + pixman_image_t *image = iter->image; + int x = iter->x; + int y = iter->y; + int width = iter->width; + uint32_t * buffer = iter->buffer; + + if (image->common.repeat == PIXMAN_REPEAT_NONE) + { + bits_image_fetch_untransformed_repeat_none ( + &image->bits, FALSE, x, y, width, buffer); + } + else + { + bits_image_fetch_untransformed_repeat_normal ( + &image->bits, FALSE, x, y, width, buffer); + } + + iter->y++; + return buffer; +} + +static uint32_t * +bits_image_fetch_untransformed_float (pixman_iter_t * iter, + const uint32_t *mask) +{ + pixman_image_t *image = iter->image; + int x = iter->x; + int y = iter->y; + int width = iter->width; + uint32_t * buffer = iter->buffer; + + if (image->common.repeat == PIXMAN_REPEAT_NONE) + { + bits_image_fetch_untransformed_repeat_none ( + &image->bits, TRUE, x, y, width, buffer); + } + else + { + bits_image_fetch_untransformed_repeat_normal ( + &image->bits, TRUE, x, y, width, buffer); + } + + iter->y++; + return buffer; +} + +typedef struct +{ + pixman_format_code_t format; + uint32_t flags; + pixman_iter_get_scanline_t get_scanline_32; + pixman_iter_get_scanline_t get_scanline_float; +} fetcher_info_t; + +static const fetcher_info_t fetcher_info[] = +{ + { PIXMAN_any, + (FAST_PATH_NO_ALPHA_MAP | + FAST_PATH_ID_TRANSFORM | + FAST_PATH_NO_CONVOLUTION_FILTER | + FAST_PATH_NO_PAD_REPEAT | + FAST_PATH_NO_REFLECT_REPEAT), + bits_image_fetch_untransformed_32, + bits_image_fetch_untransformed_float + }, + +#define FAST_BILINEAR_FLAGS \ + (FAST_PATH_NO_ALPHA_MAP | \ + FAST_PATH_NO_ACCESSORS | \ + FAST_PATH_HAS_TRANSFORM | \ + FAST_PATH_AFFINE_TRANSFORM | \ + FAST_PATH_X_UNIT_POSITIVE | \ + FAST_PATH_Y_UNIT_ZERO | \ + FAST_PATH_NONE_REPEAT | \ + FAST_PATH_BILINEAR_FILTER) + + { PIXMAN_a8r8g8b8, + FAST_BILINEAR_FLAGS, + bits_image_fetch_bilinear_no_repeat_8888, + _pixman_image_get_scanline_generic_float + }, + + { PIXMAN_x8r8g8b8, + FAST_BILINEAR_FLAGS, + bits_image_fetch_bilinear_no_repeat_8888, + _pixman_image_get_scanline_generic_float + }, + +#define GENERAL_BILINEAR_FLAGS \ + (FAST_PATH_NO_ALPHA_MAP | \ + FAST_PATH_NO_ACCESSORS | \ + FAST_PATH_HAS_TRANSFORM | \ + FAST_PATH_AFFINE_TRANSFORM | \ + FAST_PATH_BILINEAR_FILTER) + +#define GENERAL_NEAREST_FLAGS \ + (FAST_PATH_NO_ALPHA_MAP | \ + FAST_PATH_NO_ACCESSORS | \ + FAST_PATH_HAS_TRANSFORM | \ + FAST_PATH_AFFINE_TRANSFORM | \ + FAST_PATH_NEAREST_FILTER) + +#define GENERAL_SEPARABLE_CONVOLUTION_FLAGS \ + (FAST_PATH_NO_ALPHA_MAP | \ + FAST_PATH_NO_ACCESSORS | \ + FAST_PATH_HAS_TRANSFORM | \ + FAST_PATH_AFFINE_TRANSFORM | \ + FAST_PATH_SEPARABLE_CONVOLUTION_FILTER) + +#define SEPARABLE_CONVOLUTION_AFFINE_FAST_PATH(name, format, repeat) \ + { PIXMAN_ ## format, \ + GENERAL_SEPARABLE_CONVOLUTION_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \ + bits_image_fetch_separable_convolution_affine_ ## name, \ + _pixman_image_get_scanline_generic_float \ + }, + +#define BILINEAR_AFFINE_FAST_PATH(name, format, repeat) \ + { PIXMAN_ ## format, \ + GENERAL_BILINEAR_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \ + bits_image_fetch_bilinear_affine_ ## name, \ + _pixman_image_get_scanline_generic_float \ + }, + +#define NEAREST_AFFINE_FAST_PATH(name, format, repeat) \ + { PIXMAN_ ## format, \ + GENERAL_NEAREST_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \ + bits_image_fetch_nearest_affine_ ## name, \ + _pixman_image_get_scanline_generic_float \ + }, + +#define AFFINE_FAST_PATHS(name, format, repeat) \ + SEPARABLE_CONVOLUTION_AFFINE_FAST_PATH(name, format, repeat) \ + BILINEAR_AFFINE_FAST_PATH(name, format, repeat) \ + NEAREST_AFFINE_FAST_PATH(name, format, repeat) + + AFFINE_FAST_PATHS (pad_a8r8g8b8, a8r8g8b8, PAD) + AFFINE_FAST_PATHS (none_a8r8g8b8, a8r8g8b8, NONE) + AFFINE_FAST_PATHS (reflect_a8r8g8b8, a8r8g8b8, REFLECT) + AFFINE_FAST_PATHS (normal_a8r8g8b8, a8r8g8b8, NORMAL) + AFFINE_FAST_PATHS (pad_x8r8g8b8, x8r8g8b8, PAD) + AFFINE_FAST_PATHS (none_x8r8g8b8, x8r8g8b8, NONE) + AFFINE_FAST_PATHS (reflect_x8r8g8b8, x8r8g8b8, REFLECT) + AFFINE_FAST_PATHS (normal_x8r8g8b8, x8r8g8b8, NORMAL) + AFFINE_FAST_PATHS (pad_a8, a8, PAD) + AFFINE_FAST_PATHS (none_a8, a8, NONE) + AFFINE_FAST_PATHS (reflect_a8, a8, REFLECT) + AFFINE_FAST_PATHS (normal_a8, a8, NORMAL) + AFFINE_FAST_PATHS (pad_r5g6b5, r5g6b5, PAD) + AFFINE_FAST_PATHS (none_r5g6b5, r5g6b5, NONE) + AFFINE_FAST_PATHS (reflect_r5g6b5, r5g6b5, REFLECT) + AFFINE_FAST_PATHS (normal_r5g6b5, r5g6b5, NORMAL) + + /* Affine, no alpha */ + { PIXMAN_any, + (FAST_PATH_NO_ALPHA_MAP | FAST_PATH_HAS_TRANSFORM | FAST_PATH_AFFINE_TRANSFORM), + bits_image_fetch_affine_no_alpha, + _pixman_image_get_scanline_generic_float + }, + + /* General */ + { PIXMAN_any, + 0, + bits_image_fetch_general, + _pixman_image_get_scanline_generic_float + }, + + { PIXMAN_null }, +}; + +static void +bits_image_property_changed (pixman_image_t *image) +{ + _pixman_bits_image_setup_accessors (&image->bits); +} + +void +_pixman_bits_image_src_iter_init (pixman_image_t *image, pixman_iter_t *iter) +{ + pixman_format_code_t format = image->common.extended_format_code; + uint32_t flags = image->common.flags; + const fetcher_info_t *info; + + for (info = fetcher_info; info->format != PIXMAN_null; ++info) + { + if ((info->format == format || info->format == PIXMAN_any) && + (info->flags & flags) == info->flags) + { + if (iter->iter_flags & ITER_NARROW) + { + iter->get_scanline = info->get_scanline_32; + } + else + { + iter->data = info->get_scanline_32; + iter->get_scanline = info->get_scanline_float; + } + return; + } + } + + /* Just in case we somehow didn't find a scanline function */ + iter->get_scanline = _pixman_iter_get_scanline_noop; +} + +static uint32_t * +dest_get_scanline_16 (pixman_iter_t *iter, const uint32_t *mask) +{ + pixman_image_t *image = iter->image; + int x = iter->x; + int y = iter->y; + int width = iter->width; + uint32_t * buffer = iter->buffer; + + image->bits.fetch_scanline_16 (image, x, y, width, buffer, mask); + + return iter->buffer; +} + +static uint32_t * +dest_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask) +{ + pixman_image_t *image = iter->image; + int x = iter->x; + int y = iter->y; + int width = iter->width; + uint32_t * buffer = iter->buffer; + + image->bits.fetch_scanline_32 (image, x, y, width, buffer, mask); + if (image->common.alpha_map) + { + uint32_t *alpha; + + if ((alpha = malloc (width * sizeof (uint32_t)))) + { + int i; + + x -= image->common.alpha_origin_x; + y -= image->common.alpha_origin_y; + + image->common.alpha_map->fetch_scanline_32 ( + (pixman_image_t *)image->common.alpha_map, + x, y, width, alpha, mask); + + for (i = 0; i < width; ++i) + { + buffer[i] &= ~0xff000000; + buffer[i] |= (alpha[i] & 0xff000000); + } + + free (alpha); + } + } + + return iter->buffer; +} + +static uint32_t * +dest_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask) +{ + bits_image_t * image = &iter->image->bits; + int x = iter->x; + int y = iter->y; + int width = iter->width; + argb_t * buffer = (argb_t *)iter->buffer; + + image->fetch_scanline_float ( + (pixman_image_t *)image, x, y, width, (uint32_t *)buffer, mask); + if (image->common.alpha_map) + { + argb_t *alpha; + + if ((alpha = malloc (width * sizeof (argb_t)))) + { + int i; + + x -= image->common.alpha_origin_x; + y -= image->common.alpha_origin_y; + + image->common.alpha_map->fetch_scanline_float ( + (pixman_image_t *)image->common.alpha_map, + x, y, width, (uint32_t *)alpha, mask); + + for (i = 0; i < width; ++i) + buffer[i].a = alpha[i].a; + + free (alpha); + } + } + + return iter->buffer; +} + +static void +dest_write_back_16 (pixman_iter_t *iter) +{ + bits_image_t * image = &iter->image->bits; + int x = iter->x; + int y = iter->y; + int width = iter->width; + const uint32_t *buffer = iter->buffer; + + image->store_scanline_16 (image, x, y, width, buffer); + + iter->y++; +} + +static void +dest_write_back_narrow (pixman_iter_t *iter) +{ + bits_image_t * image = &iter->image->bits; + int x = iter->x; + int y = iter->y; + int width = iter->width; + const uint32_t *buffer = iter->buffer; + + image->store_scanline_32 (image, x, y, width, buffer); + + if (image->common.alpha_map) + { + x -= image->common.alpha_origin_x; + y -= image->common.alpha_origin_y; + + image->common.alpha_map->store_scanline_32 ( + image->common.alpha_map, x, y, width, buffer); + } + + iter->y++; +} + +static void +dest_write_back_wide (pixman_iter_t *iter) +{ + bits_image_t * image = &iter->image->bits; + int x = iter->x; + int y = iter->y; + int width = iter->width; + const uint32_t *buffer = iter->buffer; + + image->store_scanline_float (image, x, y, width, buffer); + + if (image->common.alpha_map) + { + x -= image->common.alpha_origin_x; + y -= image->common.alpha_origin_y; + + image->common.alpha_map->store_scanline_float ( + image->common.alpha_map, x, y, width, buffer); + } + + iter->y++; +} + +void +_pixman_bits_image_dest_iter_init (pixman_image_t *image, pixman_iter_t *iter) +{ + if (iter->iter_flags & ITER_16) + { + if ((iter->iter_flags & (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA)) == + (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA)) + { + iter->get_scanline = _pixman_iter_get_scanline_noop; + } + else + { + iter->get_scanline = dest_get_scanline_16; + } + iter->write_back = dest_write_back_16; + } + else if (iter->iter_flags & ITER_NARROW) + { + if ((iter->iter_flags & (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA)) == + (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA)) + { + iter->get_scanline = _pixman_iter_get_scanline_noop; + } + else + { + iter->get_scanline = dest_get_scanline_narrow; + } + + iter->write_back = dest_write_back_narrow; + } + else + { + iter->get_scanline = dest_get_scanline_wide; + iter->write_back = dest_write_back_wide; + } +} + +static uint32_t * +create_bits (pixman_format_code_t format, + int width, + int height, + int * rowstride_bytes, + pixman_bool_t clear) +{ + int stride; + size_t buf_size; + int bpp; + + /* what follows is a long-winded way, avoiding any possibility of integer + * overflows, of saying: + * stride = ((width * bpp + 0x1f) >> 5) * sizeof (uint32_t); + */ + + bpp = PIXMAN_FORMAT_BPP (format); + if (_pixman_multiply_overflows_int (width, bpp)) + return NULL; + + stride = width * bpp; + if (_pixman_addition_overflows_int (stride, 0x1f)) + return NULL; + + stride += 0x1f; + stride >>= 5; + + stride *= sizeof (uint32_t); + + if (_pixman_multiply_overflows_size (height, stride)) + return NULL; + + buf_size = (size_t)height * stride; + + if (rowstride_bytes) + *rowstride_bytes = stride; + + if (clear) + return calloc (buf_size, 1); + else + return malloc (buf_size); +} + +pixman_bool_t +_pixman_bits_image_init (pixman_image_t * image, + pixman_format_code_t format, + int width, + int height, + uint32_t * bits, + int rowstride, + pixman_bool_t clear) +{ + uint32_t *free_me = NULL; + + if (!bits && width && height) + { + int rowstride_bytes; + + free_me = bits = create_bits (format, width, height, &rowstride_bytes, clear); + + if (!bits) + return FALSE; + + rowstride = rowstride_bytes / (int) sizeof (uint32_t); + } + + _pixman_image_init (image); + + image->type = BITS; + image->bits.format = format; + image->bits.width = width; + image->bits.height = height; + image->bits.bits = bits; + image->bits.free_me = free_me; + image->bits.read_func = NULL; + image->bits.write_func = NULL; + image->bits.rowstride = rowstride; + image->bits.indexed = NULL; + + image->common.property_changed = bits_image_property_changed; + + _pixman_image_reset_clip_region (image); + + return TRUE; +} + +static pixman_image_t * +create_bits_image_internal (pixman_format_code_t format, + int width, + int height, + uint32_t * bits, + int rowstride_bytes, + pixman_bool_t clear) +{ + pixman_image_t *image; + + /* must be a whole number of uint32_t's + */ + return_val_if_fail ( + bits == NULL || (rowstride_bytes % sizeof (uint32_t)) == 0, NULL); + + return_val_if_fail (PIXMAN_FORMAT_BPP (format) >= PIXMAN_FORMAT_DEPTH (format), NULL); + + image = _pixman_image_allocate (); + + if (!image) + return NULL; + + if (!_pixman_bits_image_init (image, format, width, height, bits, + rowstride_bytes / (int) sizeof (uint32_t), + clear)) + { + free (image); + return NULL; + } + + return image; +} + +/* If bits is NULL, a buffer will be allocated and initialized to 0 */ +PIXMAN_EXPORT pixman_image_t * +pixman_image_create_bits (pixman_format_code_t format, + int width, + int height, + uint32_t * bits, + int rowstride_bytes) +{ + return create_bits_image_internal ( + format, width, height, bits, rowstride_bytes, TRUE); +} + + +/* If bits is NULL, a buffer will be allocated and _not_ initialized */ +PIXMAN_EXPORT pixman_image_t * +pixman_image_create_bits_no_clear (pixman_format_code_t format, + int width, + int height, + uint32_t * bits, + int rowstride_bytes) +{ + return create_bits_image_internal ( + format, width, height, bits, rowstride_bytes, FALSE); +} |