+++ /dev/null
-/*
- * art_render.c: Modular rendering architecture.
- *
- * Libart_LGPL - library of basic graphic primitives
- * Copyright (C) 2000 Raph Levien
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#include "art_misc.h"
-#include "art_alphagamma.h"
-#include "art_rgb.h"
-
-#include "art_render.h"
-
-typedef struct _ArtRenderPriv ArtRenderPriv;
-
-struct _ArtRenderPriv {
- ArtRender super;
-
- ArtImageSource *image_source;
-
- int n_mask_source;
- ArtMaskSource **mask_source;
-
- int n_callbacks;
- ArtRenderCallback **callbacks;
-};
-
-ArtRender *
-art_render_new (int x0, int y0, int x1, int y1,
- art_u8 *pixels, int rowstride,
- int n_chan, int depth, ArtAlphaType alpha_type,
- ArtAlphaGamma *alphagamma)
-{
- ArtRenderPriv *priv;
- ArtRender *result;
-
- priv = art_new (ArtRenderPriv, 1);
- result = &priv->super;
-
- if (n_chan > ART_MAX_CHAN)
- {
- art_warn ("art_render_new: n_chan = %d, exceeds %d max\n",
- n_chan, ART_MAX_CHAN);
- return NULL;
- }
- if (depth > ART_MAX_DEPTH)
- {
- art_warn ("art_render_new: depth = %d, exceeds %d max\n",
- depth, ART_MAX_DEPTH);
- return NULL;
- }
- if (x0 >= x1)
- {
- art_warn ("art_render_new: x0 >= x1 (x0 = %d, x1 = %d)\n", x0, x1);
- return NULL;
- }
- result->x0 = x0;
- result->y0 = y0;
- result->x1 = x1;
- result->y1 = y1;
- result->pixels = pixels;
- result->rowstride = rowstride;
- result->n_chan = n_chan;
- result->depth = depth;
- result->alpha_type = alpha_type;
-
- result->clear = ART_FALSE;
- result->opacity = 0x10000;
- result->compositing_mode = ART_COMPOSITE_NORMAL;
- result->alphagamma = alphagamma;
-
- result->alpha_buf = NULL;
- result->image_buf = NULL;
-
- result->run = NULL;
- result->span_x = NULL;
-
- result->need_span = ART_FALSE;
-
- priv->image_source = NULL;
-
- priv->n_mask_source = 0;
- priv->mask_source = NULL;
-
- return result;
-}
-
-/* todo on clear routines: I haven't really figured out what to do
- with clearing the alpha channel. It _should_ be possible to clear
- to an arbitrary RGBA color. */
-
-/**
- * art_render_clear: Set clear color.
- * @clear_color: Color with which to clear dest.
- *
- * Sets clear color, equivalent to actually clearing the destination
- * buffer before rendering. This is the most general form.
- **/
-void
-art_render_clear (ArtRender *render, const ArtPixMaxDepth *clear_color)
-{
- int i;
- int n_ch = render->n_chan + (render->alpha_type != ART_ALPHA_NONE);
-
- render->clear = ART_TRUE;
- for (i = 0; i < n_ch; i++)
- render->clear_color[i] = clear_color[i];
-}
-
-/**
- * art_render_clear_rgb: Set clear color, given in RGB format.
- * @clear_rgb: Clear color, in 0xRRGGBB format.
- *
- * Sets clear color, equivalent to actually clearing the destination
- * buffer before rendering.
- **/
-void
-art_render_clear_rgb (ArtRender *render, art_u32 clear_rgb)
-{
- if (render->n_chan != 3)
- art_warn ("art_render_clear_rgb: called on render with %d channels, only works with 3\n",
- render->n_chan);
- else
- {
- int r, g, b;
-
- render->clear = ART_TRUE;
- r = clear_rgb >> 16;
- g = (clear_rgb >> 8) & 0xff;
- b = clear_rgb & 0xff;
- render->clear_color[0] = ART_PIX_MAX_FROM_8(r);
- render->clear_color[1] = ART_PIX_MAX_FROM_8(g);
- render->clear_color[2] = ART_PIX_MAX_FROM_8(b);
- }
-}
-
-static void
-art_render_nop_done (ArtRenderCallback *self, ArtRender *render)
-{
-}
-
-static void
-art_render_clear_render_rgb8 (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- int width = render->x1 - render->x0;
- art_u8 r, g, b;
- ArtPixMaxDepth color_max;
-
- color_max = render->clear_color[0];
- r = ART_PIX_8_FROM_MAX (color_max);
- color_max = render->clear_color[1];
- g = ART_PIX_8_FROM_MAX (color_max);
- color_max = render->clear_color[2];
- b = ART_PIX_8_FROM_MAX (color_max);
-
- art_rgb_fill_run (dest, r, g, b, width);
-}
-
-static void
-art_render_clear_render_8 (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- int width = render->x1 - render->x0;
- int i, j;
- int n_ch = render->n_chan + (render->alpha_type != ART_ALPHA_NONE);
- int ix;
- art_u8 color[ART_MAX_CHAN + 1];
-
- for (j = 0; j < n_ch; j++)
- {
- ArtPixMaxDepth color_max = render->clear_color[j];
- color[j] = ART_PIX_8_FROM_MAX (color_max);
- }
-
- ix = 0;
- for (i = 0; i < width; i++)
- for (j = 0; j < n_ch; j++)
- dest[ix++] = color[j];
-}
-
-const ArtRenderCallback art_render_clear_rgb8_obj =
-{
- art_render_clear_render_rgb8,
- art_render_nop_done
-};
-
-const ArtRenderCallback art_render_clear_8_obj =
-{
- art_render_clear_render_8,
- art_render_nop_done
-};
-
-#if ART_MAX_DEPTH >= 16
-
-static void
-art_render_clear_render_16 (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- int width = render->x1 - render->x0;
- int i, j;
- int n_ch = render->n_chan + (render->alpha_type != ART_ALPHA_NONE);
- int ix;
- art_u16 *dest_16 = (art_u16 *)dest;
- art_u8 color[ART_MAX_CHAN + 1];
-
- for (j = 0; j < n_ch; j++)
- {
- int color_16 = render->clear_color[j];
- color[j] = color_16;
- }
-
- ix = 0;
- for (i = 0; i < width; i++)
- for (j = 0; j < n_ch; j++)
- dest_16[ix++] = color[j];
-}
-
-const ArtRenderCallback art_render_clear_16_obj =
-{
- art_render_clear_render_16,
- art_render_nop_done
-};
-
-#endif /* ART_MAX_DEPTH >= 16 */
-
-/* todo: inline */
-static ArtRenderCallback *
-art_render_choose_clear_callback (ArtRender *render)
-{
- ArtRenderCallback *clear_callback;
-
- if (render->depth == 8)
- {
- if (render->n_chan == 3 &&
- render->alpha_type == ART_ALPHA_NONE)
- clear_callback = (ArtRenderCallback *)&art_render_clear_rgb8_obj;
- else
- clear_callback = (ArtRenderCallback *)&art_render_clear_8_obj;
- }
-#if ART_MAX_DEPTH >= 16
- else if (render->depth == 16)
- clear_callback = (ArtRenderCallback *)&art_render_clear_16_obj;
-#endif
- else
- {
- art_die ("art_render_choose_clear_callback: inconsistent render->depth = %d\n",
- render->depth);
- }
- return clear_callback;
-}
-
-#if 0
-/* todo: get around to writing this */
-static void
-art_render_composite_render_noa_8_norm (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- int width = render->x1 - render->x0;
-
-}
-#endif
-
-/* This is the most general form of the function. It is slow but
- (hopefully) correct. Actually, I'm still worried about roundoff
- errors in the premul case - it seems to me that an off-by-one could
- lead to overflow. */
-static void
-art_render_composite (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- ArtRenderMaskRun *run = render->run;
- art_u32 depth = render->depth;
- int n_run = render->n_run;
- int x0 = render->x0;
- int x;
- int run_x0, run_x1;
- art_u8 *alpha_buf = render->alpha_buf;
- art_u8 *image_buf = render->image_buf;
- int i, j;
- art_u32 tmp;
- art_u32 run_alpha;
- art_u32 alpha;
- int image_ix;
- art_u16 src[ART_MAX_CHAN + 1];
- art_u16 dst[ART_MAX_CHAN + 1];
- int n_chan = render->n_chan;
- ArtAlphaType alpha_type = render->alpha_type;
- int n_ch = n_chan + (alpha_type != ART_ALPHA_NONE);
- int dst_pixstride = n_ch * (depth >> 3);
- int buf_depth = render->buf_depth;
- ArtAlphaType buf_alpha = render->buf_alpha;
- int buf_n_ch = n_chan + (buf_alpha != ART_ALPHA_NONE);
- int buf_pixstride = buf_n_ch * (buf_depth >> 3);
- art_u8 *bufptr;
- art_u32 src_alpha;
- art_u32 src_mul;
- art_u8 *dstptr;
- art_u32 dst_alpha;
- art_u32 dst_mul;
-
- image_ix = 0;
- for (i = 0; i < n_run - 1; i++)
- {
- run_x0 = run[i].x;
- run_x1 = run[i + 1].x;
- tmp = run[i].alpha;
- if (tmp < 0x8100)
- continue;
-
- run_alpha = (tmp + (tmp >> 8) + (tmp >> 16) - 0x8000) >> 8; /* range [0 .. 0x10000] */
- bufptr = image_buf + (run_x0 - x0) * buf_pixstride;
- dstptr = dest + (run_x0 - x0) * dst_pixstride;
- for (x = run_x0; x < run_x1; x++)
- {
- if (alpha_buf)
- {
- if (depth == 8)
- {
- tmp = run_alpha * alpha_buf[x - x0] + 0x80;
- /* range 0x80 .. 0xff0080 */
- alpha = (tmp + (tmp >> 8) + (tmp >> 16)) >> 8;
- }
- else /* (depth == 16) */
- {
- tmp = ((art_u16 *)alpha_buf)[x - x0];
- tmp = (run_alpha * tmp + 0x8000) >> 8;
- /* range 0x80 .. 0xffff80 */
- alpha = (tmp + (tmp >> 16)) >> 8;
- }
- }
- else
- alpha = run_alpha;
- /* alpha is run_alpha * alpha_buf[x], range 0 .. 0x10000 */
-
- /* convert (src pixel * alpha) to premul alpha form,
- store in src as 0..0xffff range */
- if (buf_alpha == ART_ALPHA_NONE)
- {
- src_alpha = alpha;
- src_mul = src_alpha;
- }
- else
- {
- if (buf_depth == 8)
- {
- tmp = alpha * bufptr[n_chan] + 0x80;
- /* range 0x80 .. 0xff0080 */
- src_alpha = (tmp + (tmp >> 8) + (tmp >> 16)) >> 8;
- }
- else /* (depth == 16) */
- {
- tmp = ((art_u16 *)bufptr)[n_chan];
- tmp = (alpha * tmp + 0x8000) >> 8;
- /* range 0x80 .. 0xffff80 */
- src_alpha = (tmp + (tmp >> 16)) >> 8;
- }
- if (buf_alpha == ART_ALPHA_SEPARATE)
- src_mul = src_alpha;
- else /* buf_alpha == (ART_ALPHA_PREMUL) */
- src_mul = alpha;
- }
- /* src_alpha is the (alpha of the source pixel * alpha),
- range 0..0x10000 */
-
- if (buf_depth == 8)
- {
- src_mul *= 0x101;
- for (j = 0; j < n_chan; j++)
- src[j] = (bufptr[j] * src_mul + 0x8000) >> 16;
- }
- else if (buf_depth == 16)
- {
- for (j = 0; j < n_chan; j++)
- src[j] = (((art_u16 *)bufptr)[j] * src_mul + 0x8000) >> 16;
- }
- bufptr += buf_pixstride;
-
- /* src[0..n_chan - 1] (range 0..0xffff) and src_alpha (range
- 0..0x10000) now contain the source pixel with
- premultiplied alpha */
-
- /* convert dst pixel to premul alpha form,
- store in dst as 0..0xffff range */
- if (alpha_type == ART_ALPHA_NONE)
- {
- dst_alpha = 0x10000;
- dst_mul = dst_alpha;
- }
- else
- {
- if (depth == 8)
- {
- tmp = dstptr[n_chan];
- /* range 0..0xff */
- dst_alpha = (tmp << 8) + tmp + (tmp >> 7);
- }
- else /* (depth == 16) */
- {
- tmp = ((art_u16 *)bufptr)[n_chan];
- dst_alpha = (tmp + (tmp >> 15));
- }
- if (alpha_type == ART_ALPHA_SEPARATE)
- dst_mul = dst_alpha;
- else /* (alpha_type == ART_ALPHA_PREMUL) */
- dst_mul = 0x10000;
- }
- /* dst_alpha is the alpha of the dest pixel,
- range 0..0x10000 */
-
- if (depth == 8)
- {
- dst_mul *= 0x101;
- for (j = 0; j < n_chan; j++)
- dst[j] = (dstptr[j] * dst_mul + 0x8000) >> 16;
- }
- else if (buf_depth == 16)
- {
- for (j = 0; j < n_chan; j++)
- dst[j] = (((art_u16 *)dstptr)[j] * dst_mul + 0x8000) >> 16;
- }
-
- /* do the compositing, dst = (src over dst) */
- for (j = 0; j < n_chan; j++)
- {
- art_u32 srcv, dstv;
- art_u32 tmp;
-
- srcv = src[j];
- dstv = dst[j];
- tmp = ((dstv * (0x10000 - src_alpha) + 0x8000) >> 16) + srcv;
- tmp -= tmp >> 16;
- dst[j] = tmp;
- }
-
- if (alpha_type == ART_ALPHA_NONE)
- {
- if (depth == 8)
- dst_mul = 0xff;
- else /* (depth == 16) */
- dst_mul = 0xffff;
- }
- else
- {
- if (src_alpha >= 0x10000)
- dst_alpha = 0x10000;
- else
- dst_alpha += ((((0x10000 - dst_alpha) * src_alpha) >> 8) + 0x80) >> 8;
- if (alpha_type == ART_ALPHA_PREMUL || dst_alpha == 0)
- {
- if (depth == 8)
- dst_mul = 0xff;
- else /* (depth == 16) */
- dst_mul = 0xffff;
- }
- else /* (ALPHA_TYPE == ART_ALPHA_SEPARATE && dst_alpha != 0) */
- {
- if (depth == 8)
- dst_mul = 0xff0000 / dst_alpha;
- else /* (depth == 16) */
- dst_mul = 0xffff0000 / dst_alpha;
- }
- }
- if (depth == 8)
- {
- for (j = 0; j < n_chan; j++)
- dstptr[j] = (dst[j] * dst_mul + 0x8000) >> 16;
- if (alpha_type != ART_ALPHA_NONE)
- dstptr[n_chan] = (dst_alpha * 0xff + 0x8000) >> 16;
- }
- else if (depth == 16)
- {
- for (j = 0; j < n_chan; j++)
- ((art_u16 *)dstptr)[j] = (dst[j] * dst_mul + 0x8000) >> 16;
- if (alpha_type != ART_ALPHA_NONE)
- dstptr[n_chan] = (dst_alpha * 0xffff + 0x8000) >> 16;
- }
- dstptr += dst_pixstride;
- }
- }
-}
-
-const ArtRenderCallback art_render_composite_obj =
-{
- art_render_composite,
- art_render_nop_done
-};
-
-static void
-art_render_composite_8 (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- ArtRenderMaskRun *run = render->run;
- int n_run = render->n_run;
- int x0 = render->x0;
- int x;
- int run_x0, run_x1;
- art_u8 *alpha_buf = render->alpha_buf;
- art_u8 *image_buf = render->image_buf;
- int i, j;
- art_u32 tmp;
- art_u32 run_alpha;
- art_u32 alpha;
- int image_ix;
- int n_chan = render->n_chan;
- ArtAlphaType alpha_type = render->alpha_type;
- int n_ch = n_chan + (alpha_type != ART_ALPHA_NONE);
- int dst_pixstride = n_ch;
- ArtAlphaType buf_alpha = render->buf_alpha;
- int buf_n_ch = n_chan + (buf_alpha != ART_ALPHA_NONE);
- int buf_pixstride = buf_n_ch;
- art_u8 *bufptr;
- art_u32 src_alpha;
- art_u32 src_mul;
- art_u8 *dstptr;
- art_u32 dst_alpha;
- art_u32 dst_mul, dst_save_mul;
-
- image_ix = 0;
- for (i = 0; i < n_run - 1; i++)
- {
- run_x0 = run[i].x;
- run_x1 = run[i + 1].x;
- tmp = run[i].alpha;
- if (tmp < 0x10000)
- continue;
-
- run_alpha = (tmp + (tmp >> 8) + (tmp >> 16) - 0x8000) >> 8; /* range [0 .. 0x10000] */
- bufptr = image_buf + (run_x0 - x0) * buf_pixstride;
- dstptr = dest + (run_x0 - x0) * dst_pixstride;
- for (x = run_x0; x < run_x1; x++)
- {
- if (alpha_buf)
- {
- tmp = run_alpha * alpha_buf[x - x0] + 0x80;
- /* range 0x80 .. 0xff0080 */
- alpha = (tmp + (tmp >> 8) + (tmp >> 16)) >> 8;
- }
- else
- alpha = run_alpha;
- /* alpha is run_alpha * alpha_buf[x], range 0 .. 0x10000 */
-
- /* convert (src pixel * alpha) to premul alpha form,
- store in src as 0..0xffff range */
- if (buf_alpha == ART_ALPHA_NONE)
- {
- src_alpha = alpha;
- src_mul = src_alpha;
- }
- else
- {
- tmp = alpha * bufptr[n_chan] + 0x80;
- /* range 0x80 .. 0xff0080 */
- src_alpha = (tmp + (tmp >> 8) + (tmp >> 16)) >> 8;
-
- if (buf_alpha == ART_ALPHA_SEPARATE)
- src_mul = src_alpha;
- else /* buf_alpha == (ART_ALPHA_PREMUL) */
- src_mul = alpha;
- }
- /* src_alpha is the (alpha of the source pixel * alpha),
- range 0..0x10000 */
-
- src_mul *= 0x101;
-
- if (alpha_type == ART_ALPHA_NONE)
- {
- dst_alpha = 0x10000;
- dst_mul = dst_alpha;
- }
- else
- {
- tmp = dstptr[n_chan];
- /* range 0..0xff */
- dst_alpha = (tmp << 8) + tmp + (tmp >> 7);
- if (alpha_type == ART_ALPHA_SEPARATE)
- dst_mul = dst_alpha;
- else /* (alpha_type == ART_ALPHA_PREMUL) */
- dst_mul = 0x10000;
- }
- /* dst_alpha is the alpha of the dest pixel,
- range 0..0x10000 */
-
- dst_mul *= 0x101;
-
- if (alpha_type == ART_ALPHA_NONE)
- {
- dst_save_mul = 0xff;
- }
- else
- {
- if (src_alpha >= 0x10000)
- dst_alpha = 0x10000;
- else
- dst_alpha += ((((0x10000 - dst_alpha) * src_alpha) >> 8) + 0x80) >> 8;
- if (alpha_type == ART_ALPHA_PREMUL || dst_alpha == 0)
- {
- dst_save_mul = 0xff;
- }
- else /* (ALPHA_TYPE == ART_ALPHA_SEPARATE && dst_alpha != 0) */
- {
- dst_save_mul = 0xff0000 / dst_alpha;
- }
- }
- for (j = 0; j < n_chan; j++)
- {
- art_u32 src, dst;
- art_u32 tmp;
-
- src = (bufptr[j] * src_mul + 0x8000) >> 16;
- dst = (dstptr[j] * dst_mul + 0x8000) >> 16;
- tmp = ((dst * (0x10000 - src_alpha) + 0x8000) >> 16) + src;
- tmp -= tmp >> 16;
- dstptr[j] = (tmp * dst_save_mul + 0x8000) >> 16;
- }
- if (alpha_type != ART_ALPHA_NONE)
- dstptr[n_chan] = (dst_alpha * 0xff + 0x8000) >> 16;
-
- bufptr += buf_pixstride;
- dstptr += dst_pixstride;
- }
- }
-}
-
-const ArtRenderCallback art_render_composite_8_obj =
-{
- art_render_composite_8,
- art_render_nop_done
-};
-
-/* todo: inline */
-static ArtRenderCallback *
-art_render_choose_compositing_callback (ArtRender *render)
-{
- if (render->depth == 8 && render->buf_depth == 8)
- return (ArtRenderCallback *)&art_render_composite_8_obj;
- return (ArtRenderCallback *)&art_render_composite_obj;
-}
-
-/**
- * art_render_invoke_callbacks: Invoke the callbacks in the render object.
- * @render: The render object.
- * @y: The current Y coordinate value.
- *
- * Invokes the callbacks of the render object in the appropriate
- * order. Drivers should call this routine once per scanline.
- *
- * todo: should management of dest devolve to this routine? very
- * plausibly yes.
- **/
-void
-art_render_invoke_callbacks (ArtRender *render, art_u8 *dest, int y)
-{
- ArtRenderPriv *priv = (ArtRenderPriv *)render;
- int i;
-
- for (i = 0; i < priv->n_callbacks; i++)
- {
- ArtRenderCallback *callback;
-
- callback = priv->callbacks[i];
- callback->render (callback, render, dest, y);
- }
-}
-
-/**
- * art_render_invoke: Perform the requested rendering task.
- * @render: The render object.
- *
- * Invokes the renderer and all sources associated with it, to perform
- * the requested rendering task.
- **/
-void
-art_render_invoke (ArtRender *render)
-{
- ArtRenderPriv *priv = (ArtRenderPriv *)render;
- int width;
- int best_driver, best_score;
- int i;
- int n_callbacks, n_callbacks_max;
- ArtImageSource *image_source;
- ArtImageSourceFlags image_flags;
- int buf_depth;
- ArtAlphaType buf_alpha;
- art_boolean first = ART_TRUE;
-
- if (render == NULL)
- {
- art_warn ("art_render_invoke: called with render == NULL\n");
- return;
- }
- if (priv->image_source == NULL)
- {
- art_warn ("art_render_invoke: no image source given\n");
- return;
- }
-
- width = render->x1 - render->x0;
-
- render->run = art_new (ArtRenderMaskRun, width + 1);
-
- /* Elect a mask source as driver. */
- best_driver = -1;
- best_score = 0;
- for (i = 0; i < priv->n_mask_source; i++)
- {
- int score;
- ArtMaskSource *mask_source;
-
- mask_source = priv->mask_source[i];
- score = mask_source->can_drive (mask_source, render);
- if (score > best_score)
- {
- best_score = score;
- best_driver = i;
- }
- }
-
- /* Allocate alpha buffer if needed. */
- if (priv->n_mask_source > 1 ||
- (priv->n_mask_source == 1 && best_driver < 0))
- {
- render->alpha_buf = art_new (art_u8, (width * render->depth) >> 3);
- }
-
- /* Negotiate image rendering and compositing. */
- image_source = priv->image_source;
- image_source->negotiate (image_source, render, &image_flags, &buf_depth,
- &buf_alpha);
-
- /* Build callback list. */
- n_callbacks_max = priv->n_mask_source + 3;
- priv->callbacks = art_new (ArtRenderCallback *, n_callbacks_max);
- n_callbacks = 0;
- for (i = 0; i < priv->n_mask_source; i++)
- if (i != best_driver)
- {
- ArtMaskSource *mask_source = priv->mask_source[i];
-
- mask_source->prepare (mask_source, render, first);
- first = ART_FALSE;
- priv->callbacks[n_callbacks++] = &mask_source->super;
- }
-
- if (render->clear && !(image_flags & ART_IMAGE_SOURCE_CAN_CLEAR))
- priv->callbacks[n_callbacks++] =
- art_render_choose_clear_callback (render);
-
- priv->callbacks[n_callbacks++] = &image_source->super;
-
- /* Allocate image buffer and add compositing callback if needed. */
- if (!(image_flags & ART_IMAGE_SOURCE_CAN_COMPOSITE))
- {
- int bytespp = ((render->n_chan + (buf_alpha != ART_ALPHA_NONE)) *
- buf_depth) >> 3;
- render->buf_depth = buf_depth;
- render->buf_alpha = buf_alpha;
- render->image_buf = art_new (art_u8, width * bytespp);
- priv->callbacks[n_callbacks++] =
- art_render_choose_compositing_callback (render);
- }
-
- priv->n_callbacks = n_callbacks;
-
- if (render->need_span)
- render->span_x = art_new (int, width + 1);
-
- /* Invoke the driver */
- if (best_driver >= 0)
- {
- ArtMaskSource *driver;
-
- driver = priv->mask_source[best_driver];
- driver->invoke_driver (driver, render);
- }
- else
- {
- art_u8 *dest_ptr = render->pixels;
- int y;
-
- /* Dummy driver */
- render->n_run = 2;
- render->run[0].x = render->x0;
- render->run[0].alpha = 0x8000 + 0xff * render->opacity;
- render->run[1].x = render->x1;
- render->run[1].alpha = 0x8000;
- if (render->need_span)
- {
- render->n_span = 2;
- render->span_x[0] = render->x0;
- render->span_x[1] = render->x1;
- }
- for (y = render->y0; y < render->y1; y++)
- {
- art_render_invoke_callbacks (render, dest_ptr, y);
- dest_ptr += render->rowstride;
- }
- }
-
- if (priv->mask_source != NULL)
- art_free (priv->mask_source);
-
- /* clean up callbacks */
- for (i = 0; i < priv->n_callbacks; i++)
- {
- ArtRenderCallback *callback;
-
- callback = priv->callbacks[i];
- callback->done (callback, render);
- }
-
- /* Tear down object */
- if (render->alpha_buf != NULL)
- art_free (render->alpha_buf);
- if (render->image_buf != NULL)
- art_free (render->image_buf);
- art_free (render->run);
- if (render->span_x != NULL)
- art_free (render->span_x);
- art_free (priv->callbacks);
- art_free (render);
-}
-
-/**
- * art_render_mask_solid: Add a solid translucent mask.
- * @render: The render object.
- * @opacity: Opacity in [0..0x10000] form.
- *
- * Adds a translucent mask to the rendering object.
- **/
-void
-art_render_mask_solid (ArtRender *render, int opacity)
-{
- art_u32 old_opacity = render->opacity;
- art_u32 new_opacity_tmp;
-
- if (opacity == 0x10000)
- /* avoid potential overflow */
- return;
- new_opacity_tmp = old_opacity * (art_u32)opacity + 0x8000;
- render->opacity = new_opacity_tmp >> 16;
-}
-
-/**
- * art_render_add_mask_source: Add a mask source to the render object.
- * @render: Render object.
- * @mask_source: Mask source to add.
- *
- * This routine adds a mask source to the render object. In general,
- * client api's for adding mask sources should just take a render object,
- * then the mask source creation function should call this function.
- * Clients should never have to call this function directly, unless of
- * course they're creating custom mask sources.
- **/
-void
-art_render_add_mask_source (ArtRender *render, ArtMaskSource *mask_source)
-{
- ArtRenderPriv *priv = (ArtRenderPriv *)render;
- int n_mask_source = priv->n_mask_source++;
-
- if (n_mask_source == 0)
- priv->mask_source = art_new (ArtMaskSource *, 1);
- /* This predicate is true iff n_mask_source is a power of two */
- else if (!(n_mask_source & (n_mask_source - 1)))
- priv->mask_source = art_renew (priv->mask_source, ArtMaskSource *,
- n_mask_source << 1);
-
- priv->mask_source[n_mask_source] = mask_source;
-}
-
-/**
- * art_render_add_image_source: Add a mask source to the render object.
- * @render: Render object.
- * @image_source: Image source to add.
- *
- * This routine adds an image source to the render object. In general,
- * client api's for adding image sources should just take a render
- * object, then the mask source creation function should call this
- * function. Clients should never have to call this function
- * directly, unless of course they're creating custom image sources.
- **/
-void
-art_render_add_image_source (ArtRender *render, ArtImageSource *image_source)
-{
- ArtRenderPriv *priv = (ArtRenderPriv *)render;
-
- if (priv->image_source != NULL)
- {
- art_warn ("art_render_add_image_source: image source already present.\n");
- return;
- }
- priv->image_source = image_source;
-}
-
-/* Solid image source object and methods. Perhaps this should go into a
- separate file. */
-
-typedef struct _ArtImageSourceSolid ArtImageSourceSolid;
-
-struct _ArtImageSourceSolid {
- ArtImageSource super;
- ArtPixMaxDepth color[ART_MAX_CHAN];
- art_u32 *rgbtab;
- art_boolean init;
-};
-
-static void
-art_render_image_solid_done (ArtRenderCallback *self, ArtRender *render)
-{
- ArtImageSourceSolid *z = (ArtImageSourceSolid *)self;
-
- if (z->rgbtab != NULL)
- art_free (z->rgbtab);
- art_free (self);
-}
-
-static void
-art_render_image_solid_rgb8_opaq_init (ArtImageSourceSolid *self, ArtRender *render)
-{
- ArtImageSourceSolid *z = (ArtImageSourceSolid *)self;
- ArtPixMaxDepth color_max;
- int r_fg, g_fg, b_fg;
- int r_bg, g_bg, b_bg;
- int r, g, b;
- int dr, dg, db;
- int i;
- int tmp;
- art_u32 *rgbtab;
-
- rgbtab = art_new (art_u32, 256);
- z->rgbtab = rgbtab;
-
- color_max = self->color[0];
- r_fg = ART_PIX_8_FROM_MAX (color_max);
- color_max = self->color[1];
- g_fg = ART_PIX_8_FROM_MAX (color_max);
- color_max = self->color[2];
- b_fg = ART_PIX_8_FROM_MAX (color_max);
-
- color_max = render->clear_color[0];
- r_bg = ART_PIX_8_FROM_MAX (color_max);
- color_max = render->clear_color[1];
- g_bg = ART_PIX_8_FROM_MAX (color_max);
- color_max = render->clear_color[2];
- b_bg = ART_PIX_8_FROM_MAX (color_max);
-
- r = (r_bg << 16) + 0x8000;
- g = (g_bg << 16) + 0x8000;
- b = (b_bg << 16) + 0x8000;
- tmp = ((r_fg - r_bg) << 16) + 0x80;
- dr = (tmp + (tmp >> 8)) >> 8;
- tmp = ((g_fg - g_bg) << 16) + 0x80;
- dg = (tmp + (tmp >> 8)) >> 8;
- tmp = ((b_fg - b_bg) << 16) + 0x80;
- db = (tmp + (tmp >> 8)) >> 8;
-
- for (i = 0; i < 256; i++)
- {
- rgbtab[i] = (r & 0xff0000) | ((g & 0xff0000) >> 8) | (b >> 16);
- r += dr;
- g += dg;
- b += db;
- }
-}
-
-static void
-art_render_image_solid_rgb8_opaq (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- ArtImageSourceSolid *z = (ArtImageSourceSolid *)self;
- ArtRenderMaskRun *run = render->run;
- int n_run = render->n_run;
- art_u32 *rgbtab = z->rgbtab;
- art_u32 rgb;
- int x0 = render->x0;
- int x1 = render->x1;
- int run_x0, run_x1;
- int i;
- int ix;
-
- if (n_run > 0)
- {
- run_x1 = run[0].x;
- if (run_x1 > x0)
- {
- rgb = rgbtab[0];
- art_rgb_fill_run (dest,
- rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
- run_x1 - x0);
- }
- for (i = 0; i < n_run - 1; i++)
- {
- run_x0 = run_x1;
- run_x1 = run[i + 1].x;
- rgb = rgbtab[(run[i].alpha >> 16) & 0xff];
- ix = (run_x0 - x0) * 3;
-#define OPTIMIZE_LEN_1
-#ifdef OPTIMIZE_LEN_1
- if (run_x1 - run_x0 == 1)
- {
- dest[ix] = rgb >> 16;
- dest[ix + 1] = (rgb >> 8) & 0xff;
- dest[ix + 2] = rgb & 0xff;
- }
- else
- {
- art_rgb_fill_run (dest + ix,
- rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
- run_x1 - run_x0);
- }
-#else
- art_rgb_fill_run (dest + ix,
- rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
- run_x1 - run_x0);
-#endif
- }
- }
- else
- {
- run_x1 = x0;
- }
- if (run_x1 < x1)
- {
- rgb = rgbtab[0];
- art_rgb_fill_run (dest + (run_x1 - x0) * 3,
- rgb >> 16, (rgb >> 8) & 0xff, rgb & 0xff,
- x1 - run_x1);
- }
-}
-
-static void
-art_render_image_solid_rgb8 (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y)
-{
- ArtImageSourceSolid *z = (ArtImageSourceSolid *)self;
- int width = render->x1 - render->x0;
- art_u8 r, g, b;
- ArtPixMaxDepth color_max;
-
- /* todo: replace this simple test with real sparseness */
- if (z->init)
- return;
- z->init = ART_TRUE;
-
- color_max = z->color[0];
- r = ART_PIX_8_FROM_MAX (color_max);
- color_max = z->color[1];
- g = ART_PIX_8_FROM_MAX (color_max);
- color_max = z->color[2];
- b = ART_PIX_8_FROM_MAX (color_max);
-
- art_rgb_fill_run (render->image_buf, r, g, b, width);
-}
-
-static void
-art_render_image_solid_negotiate (ArtImageSource *self, ArtRender *render,
- ArtImageSourceFlags *p_flags,
- int *p_buf_depth, ArtAlphaType *p_alpha)
-{
- ArtImageSourceSolid *z = (ArtImageSourceSolid *)self;
- ArtImageSourceFlags flags = 0;
- static void (*render_cbk) (ArtRenderCallback *self, ArtRender *render,
- art_u8 *dest, int y);
-
- render_cbk = NULL;
-
- if (render->depth == 8 && render->n_chan == 3 &&
- render->alpha_type == ART_ALPHA_NONE)
- {
- if (render->clear)
- {
- render_cbk = art_render_image_solid_rgb8_opaq;
- flags |= ART_IMAGE_SOURCE_CAN_CLEAR | ART_IMAGE_SOURCE_CAN_COMPOSITE;
- art_render_image_solid_rgb8_opaq_init (z, render);
- }
- }
- if (render_cbk == NULL)
- {
- if (render->depth == 8)
- {
- render_cbk = art_render_image_solid_rgb8;
- *p_buf_depth = 8;
- *p_alpha = ART_ALPHA_NONE; /* todo */
- }
- }
- /* todo: general case */
- self->super.render = render_cbk;
- *p_flags = flags;
-}
-
-/**
- * art_render_image_solid: Add a solid color image source.
- * @render: The render object.
- * @color: Color.
- *
- * Adds an image source with the solid color given by @color. The
- * color need not be retained in memory after this call.
- **/
-void
-art_render_image_solid (ArtRender *render, ArtPixMaxDepth *color)
-{
- ArtImageSourceSolid *image_source;
- int i;
-
- image_source = art_new (ArtImageSourceSolid, 1);
- image_source->super.super.render = NULL;
- image_source->super.super.done = art_render_image_solid_done;
- image_source->super.negotiate = art_render_image_solid_negotiate;
-
- for (i = 0; i < render->n_chan; i++)
- image_source->color[i] = color[i];
-
- image_source->rgbtab = NULL;
- image_source->init = ART_FALSE;
-
- art_render_add_image_source (render, &image_source->super);
-}
projects / rrdtool.git / blobdiff