| /* |
| * 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 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; |
| } |
| |
| 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 (image, x, y, w, buffer, NULL); |
| else |
| image->fetch_scanline_32 (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 (image, x, y, w, buffer, NULL); |
| else |
| image->fetch_scanline_32 (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 |
| }, |
| |
| /* 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_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->bits, 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 ( |
| 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 ( |
| 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 ( |
| 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_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_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); |
| } |
