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-rw-r--r--frontends/riscos/plotters.c784
1 files changed, 480 insertions, 304 deletions
diff --git a/frontends/riscos/plotters.c b/frontends/riscos/plotters.c
index 06e732d99..b12d6c403 100644
--- a/frontends/riscos/plotters.c
+++ b/frontends/riscos/plotters.c
@@ -16,8 +16,9 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-/** \file
- * Target independent plotting (RISC OS screen implementation).
+/**
+ * \file
+ * RISC OS screen plotter implementation.
*/
#include <stdbool.h>
@@ -35,38 +36,6 @@
#include "riscos/font.h"
#include "riscos/oslib_pre7.h"
-static bool ro_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style);
-static bool ro_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style);
-static bool ro_plot_draw_path(const draw_path * const path, int width,
- colour c, bool dotted, bool dashed);
-static bool ro_plot_polygon(const int *p, unsigned int n, const plot_style_t *style);
-static bool ro_plot_path(const float *p, unsigned int n, colour fill, float width,
- colour c, const float transform[6]);
-static bool ro_plot_clip(const struct rect *clip);
-static bool ro_plot_text(int x, int y, const char *text, size_t length,
- const plot_font_style_t *fstyle);
-static bool ro_plot_disc(int x, int y, int radius, const plot_style_t *style);
-static bool ro_plot_arc(int x, int y, int radius, int angle1, int angle2,
- const plot_style_t *style);
-static bool ro_plot_bitmap(int x, int y, int width, int height,
- struct bitmap *bitmap, colour bg,
- bitmap_flags_t flags);
-
-
-struct plotter_table plot;
-
-const struct plotter_table ro_plotters = {
- .rectangle = ro_plot_rectangle,
- .line = ro_plot_line,
- .polygon = ro_plot_polygon,
- .clip = ro_plot_clip,
- .text = ro_plot_text,
- .disc = ro_plot_disc,
- .arc = ro_plot_arc,
- .bitmap = ro_plot_bitmap,
- .path = ro_plot_path,
- .option_knockout = true,
-};
int ro_plot_origin_x = 0;
int ro_plot_origin_y = 0;
@@ -74,143 +43,387 @@ int ro_plot_origin_y = 0;
/** One version of the A9home OS is incapable of drawing patterned lines */
bool ro_plot_patterned_lines = true;
+/**
+ * plot a path on RISC OS
+ */
+static nserror
+ro_plot_draw_path(const draw_path * const path,
+ int width,
+ colour c,
+ bool dotted,
+ bool dashed)
+{
+ static const draw_line_style line_style = {
+ draw_JOIN_MITRED,
+ draw_CAP_BUTT,
+ draw_CAP_BUTT,
+ 0, 0x7fffffff,
+ 0, 0, 0, 0
+ };
+ draw_dash_pattern dash = { 0, 1, { 512 } };
+ const draw_dash_pattern *dash_pattern = 0;
+ os_error *error;
+
+ if (width < 1)
+ width = 1;
+
+ if (ro_plot_patterned_lines) {
+ if (dotted) {
+ dash.elements[0] = 512 * width;
+ dash_pattern = &dash;
+ } else if (dashed) {
+ dash.elements[0] = 1536 * width;
+ dash_pattern = &dash;
+ }
+ }
+
+ error = xcolourtrans_set_gcol(c << 8, 0, os_ACTION_OVERWRITE, 0, 0);
+ if (error) {
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+
+ error = xdraw_stroke(path, 0, 0, 0, width * 2 * 256,
+ &line_style, dash_pattern);
+ if (error) {
+ LOG("xdraw_stroke: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+
+ return NSERROR_OK;
+}
+
+
+/**
+ * \brief Sets a clip rectangle for subsequent plot operations.
+ *
+ * \param ctx The current redraw context.
+ * \param clip The rectangle to limit all subsequent plot
+ * operations within.
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_clip(const struct redraw_context *ctx, const struct rect *clip)
+{
+ os_error *error;
+ char buf[12];
+
+ int clip_x0 = ro_plot_origin_x + clip->x0 * 2;
+ int clip_y0 = ro_plot_origin_y - clip->y0 * 2 - 1;
+ int clip_x1 = ro_plot_origin_x + clip->x1 * 2 - 1;
+ int clip_y1 = ro_plot_origin_y - clip->y1 * 2;
+
+ if (clip_x1 < clip_x0 || clip_y0 < clip_y1) {
+ LOG("bad clip rectangle %i %i %i %i",
+ clip_x0, clip_y0, clip_x1, clip_y1);
+ return NSERROR_BAD_SIZE;
+ }
+
+ buf[0] = os_VDU_SET_GRAPHICS_WINDOW;
+ buf[1] = clip_x0;
+ buf[2] = clip_x0 >> 8;
+ buf[3] = clip_y1;
+ buf[4] = clip_y1 >> 8;
+ buf[5] = clip_x1;
+ buf[6] = clip_x1 >> 8;
+ buf[7] = clip_y0;
+ buf[8] = clip_y0 >> 8;
+
+ error = xos_writen(buf, 9);
+ if (error) {
+ LOG("xos_writen: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+
+ return NSERROR_OK;
+}
+
+
+/**
+ * Plots an arc
+ *
+ * plot an arc segment around (x,y), anticlockwise from angle1
+ * to angle2. Angles are measured anticlockwise from
+ * horizontal, in degrees.
+ *
+ * \param ctx The current redraw context.
+ * \param pstyle Style controlling the arc plot.
+ * \param x The x coordinate of the arc.
+ * \param y The y coordinate of the arc.
+ * \param radius The radius of the arc.
+ * \param angle1 The start angle of the arc.
+ * \param angle2 The finish angle of the arc.
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_arc(const struct redraw_context *ctx,
+ const plot_style_t *style,
+ int x, int y, int radius, int angle1, int angle2)
+{
+ os_error *error;
+ int sx, sy, ex, ey;
+ double t;
+
+ x = ro_plot_origin_x + x * 2;
+ y = ro_plot_origin_y - y * 2;
+ radius <<= 1;
+
+ error = xcolourtrans_set_gcol(style->fill_colour << 8, 0,
+ os_ACTION_OVERWRITE, 0, 0);
+
+ if (error) {
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+
+ t = ((double)angle1 * M_PI) / 180.0;
+ sx = (x + (int)(radius * cos(t)));
+ sy = (y + (int)(radius * sin(t)));
+ t = ((double)angle2 * M_PI) / 180.0;
+ ex = (x + (int)(radius * cos(t)));
+ ey = (y + (int)(radius * sin(t)));
-bool ro_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
+ error = xos_plot(os_MOVE_TO, x, y); /* move to centre */
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+
+ error = xos_plot(os_MOVE_TO, sx, sy); /* move to start */
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+
+ error = xos_plot(os_PLOT_ARC | os_PLOT_TO, ex, ey); /* arc to end */
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+
+ return NSERROR_OK;
+}
+
+
+/**
+ * Plots a circle
+ *
+ * Plot a circle centered on (x,y), which is optionally filled.
+ *
+ * \param ctx The current redraw context.
+ * \param pstyle Style controlling the circle plot.
+ * \param x The x coordinate of the circle.
+ * \param y The y coordinate of the circle.
+ * \param radius The radius of the circle.
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_disc(const struct redraw_context *ctx,
+ const plot_style_t *style,
+ int x, int y, int radius)
{
+ os_error *error;
if (style->fill_type != PLOT_OP_TYPE_NONE) {
- os_error *error;
- error = xcolourtrans_set_gcol(style->fill_colour << 8,
- colourtrans_USE_ECFS_GCOL,
- os_ACTION_OVERWRITE, 0, 0);
+ error = xcolourtrans_set_gcol(style->fill_colour << 8, 0,
+ os_ACTION_OVERWRITE, 0, 0);
if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
+ return NSERROR_INVALID;
}
-
error = xos_plot(os_MOVE_TO,
- ro_plot_origin_x + x0 * 2,
- ro_plot_origin_y - y0 * 2 - 1);
+ ro_plot_origin_x + x * 2,
+ ro_plot_origin_y - y * 2);
if (error) {
LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ return NSERROR_INVALID;
}
-
- error = xos_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
- ro_plot_origin_x + x1 * 2 - 1,
- ro_plot_origin_y - y1 * 2);
+ error = xos_plot(os_PLOT_CIRCLE | os_PLOT_BY, radius * 2, 0);
if (error) {
LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ return NSERROR_INVALID;
}
}
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
- bool dotted = false;
- bool dashed = false;
-
- const int path[] = { draw_MOVE_TO,
- (ro_plot_origin_x + x0 * 2) * 256,
- (ro_plot_origin_y - y0 * 2 - 1) * 256,
- draw_LINE_TO,
- (ro_plot_origin_x + (x1) * 2) * 256,
- (ro_plot_origin_y - y0 * 2 - 1) * 256,
- draw_LINE_TO,
- (ro_plot_origin_x + (x1) * 2) * 256,
- (ro_plot_origin_y - (y1) * 2 - 1) * 256,
- draw_LINE_TO,
- (ro_plot_origin_x + x0 * 2) * 256,
- (ro_plot_origin_y - (y1) * 2 - 1) * 256,
- draw_CLOSE_LINE,
- (ro_plot_origin_x + x0 * 2) * 256,
- (ro_plot_origin_y - y0 * 2 - 1) * 256,
- draw_END_PATH };
-
- if (style->stroke_type == PLOT_OP_TYPE_DOT)
- dotted = true;
- if (style->stroke_type == PLOT_OP_TYPE_DASH)
- dashed = true;
+ error = xcolourtrans_set_gcol(style->stroke_colour << 8, 0,
+ os_ACTION_OVERWRITE, 0, 0);
+ if (error) {
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+ error = xos_plot(os_MOVE_TO,
+ ro_plot_origin_x + x * 2,
+ ro_plot_origin_y - y * 2);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
+ error = xos_plot(os_PLOT_CIRCLE_OUTLINE | os_PLOT_BY,
+ radius * 2, 0);
- ro_plot_draw_path((const draw_path *)path,
- style->stroke_width,
- style->stroke_colour,
- dotted, dashed);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
}
-
- return true;
+ return NSERROR_OK;
}
-bool ro_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
+/**
+ * Plots a line
+ *
+ * plot a line from (x0,y0) to (x1,y1). Coordinates are at
+ * centre of line width/thickness.
+ *
+ * \param ctx The current redraw context.
+ * \param pstyle Style controlling the line plot.
+ * \param line A rectangle defining the line to be drawn
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_line(const struct redraw_context *ctx,
+ const plot_style_t *style,
+ const struct rect *line)
{
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
- const int path[] = { draw_MOVE_TO,
- (ro_plot_origin_x + x0 * 2) * 256,
- (ro_plot_origin_y - y0 * 2 - 1) * 256,
- draw_LINE_TO,
- (ro_plot_origin_x + x1 * 2) * 256,
- (ro_plot_origin_y - y1 * 2 - 1) * 256,
- draw_END_PATH };
- bool dotted = false;
+ const int path[] = {
+ draw_MOVE_TO,
+ (ro_plot_origin_x + line->x0 * 2) * 256,
+ (ro_plot_origin_y - line->y0 * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + line->x1 * 2) * 256,
+ (ro_plot_origin_y - line->y1 * 2 - 1) * 256,
+ draw_END_PATH };
+ bool dotted = false;
bool dashed = false;
- if (style->stroke_type == PLOT_OP_TYPE_DOT)
+ if (style->stroke_type == PLOT_OP_TYPE_DOT)
dotted = true;
- if (style->stroke_type == PLOT_OP_TYPE_DASH)
+ if (style->stroke_type == PLOT_OP_TYPE_DASH)
dashed = true;
- return ro_plot_draw_path((const draw_path *)path,
- style->stroke_width,
- style->stroke_colour,
+ return ro_plot_draw_path((const draw_path *)path,
+ style->stroke_width,
+ style->stroke_colour,
dotted, dashed);
}
- return true;
+ return NSERROR_OK;
}
-bool ro_plot_draw_path(const draw_path * const path, int width,
- colour c, bool dotted, bool dashed)
+/**
+ * Plots a rectangle.
+ *
+ * The rectangle can be filled an outline or both controlled
+ * by the plot style The line can be solid, dotted or
+ * dashed. Top left corner at (x0,y0) and rectangle has given
+ * width and height.
+ *
+ * \param ctx The current redraw context.
+ * \param pstyle Style controlling the rectangle plot.
+ * \param rect A rectangle defining the line to be drawn
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_rectangle(const struct redraw_context *ctx,
+ const plot_style_t *style,
+ const struct rect *rect)
{
- static const draw_line_style line_style = { draw_JOIN_MITRED,
- draw_CAP_BUTT, draw_CAP_BUTT, 0, 0x7fffffff,
- 0, 0, 0, 0 };
- draw_dash_pattern dash = { 0, 1, { 512 } };
- const draw_dash_pattern *dash_pattern = 0;
- os_error *error;
+ if (style->fill_type != PLOT_OP_TYPE_NONE) {
+ os_error *error;
+ error = xcolourtrans_set_gcol(style->fill_colour << 8,
+ colourtrans_USE_ECFS_GCOL,
+ os_ACTION_OVERWRITE, 0, 0);
+ if (error) {
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
- if (width < 1)
- width = 1;
+ error = xos_plot(os_MOVE_TO,
+ ro_plot_origin_x + rect->x0 * 2,
+ ro_plot_origin_y - rect->y0 * 2 - 1);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
+ }
- if (ro_plot_patterned_lines) {
- if (dotted) {
- dash.elements[0] = 512 * width;
- dash_pattern = &dash;
- } else if (dashed) {
- dash.elements[0] = 1536 * width;
- dash_pattern = &dash;
+ error = xos_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
+ ro_plot_origin_x + rect->x1 * 2 - 1,
+ ro_plot_origin_y - rect->y1 * 2);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return NSERROR_INVALID;
}
}
- error = xcolourtrans_set_gcol(c << 8, 0, os_ACTION_OVERWRITE, 0, 0);
- if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+ bool dotted = false;
+ bool dashed = false;
- error = xdraw_stroke(path, 0, 0, 0, width * 2 * 256,
- &line_style, dash_pattern);
- if (error) {
- LOG("xdraw_stroke: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ const int path[] = {
+ draw_MOVE_TO,
+ (ro_plot_origin_x + rect->x0 * 2) * 256,
+ (ro_plot_origin_y - rect->y0 * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + (rect->x1) * 2) * 256,
+ (ro_plot_origin_y - rect->y0 * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + (rect->x1) * 2) * 256,
+ (ro_plot_origin_y - (rect->y1) * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + rect->x0 * 2) * 256,
+ (ro_plot_origin_y - (rect->y1) * 2 - 1) * 256,
+ draw_CLOSE_LINE,
+ (ro_plot_origin_x + rect->x0 * 2) * 256,
+ (ro_plot_origin_y - rect->y0 * 2 - 1) * 256,
+ draw_END_PATH
+ };
+
+ if (style->stroke_type == PLOT_OP_TYPE_DOT)
+ dotted = true;
+
+ if (style->stroke_type == PLOT_OP_TYPE_DASH)
+ dashed = true;
+
+ ro_plot_draw_path((const draw_path *)path,
+ style->stroke_width,
+ style->stroke_colour,
+ dotted,
+ dashed);
}
- return true;
+ return NSERROR_OK;
}
-bool ro_plot_polygon(const int *p, unsigned int n, const plot_style_t *style)
+/**
+ * Plot a polygon
+ *
+ * Plots a filled polygon with straight lines between
+ * points. The lines around the edge of the ploygon are not
+ * plotted. The polygon is filled with the non-zero winding
+ * rule.
+ *
+ * \param ctx The current redraw context.
+ * \param pstyle Style controlling the polygon plot.
+ * \param p verticies of polygon
+ * \param n number of verticies.
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_polygon(const struct redraw_context *ctx,
+ const plot_style_t *style,
+ const int *p,
+ unsigned int n)
{
int path[n * 3 + 2];
unsigned int i;
@@ -225,34 +438,60 @@ bool ro_plot_polygon(const int *p, unsigned int n, const plot_style_t *style)
path[n * 3] = draw_END_PATH;
path[n * 3 + 1] = 0;
- error = xcolourtrans_set_gcol(style->fill_colour << 8, 0, os_ACTION_OVERWRITE, 0, 0);
+ error = xcolourtrans_set_gcol(style->fill_colour << 8,
+ 0, os_ACTION_OVERWRITE, 0, 0);
if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
+ return NSERROR_INVALID;
}
error = xdraw_fill((draw_path *) path, 0, 0, 0);
if (error) {
LOG("xdraw_fill: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ return NSERROR_INVALID;
}
- return true;
+ return NSERROR_OK;
}
-bool ro_plot_path(const float *p, unsigned int n, colour fill, float width,
- colour c, const float transform[6])
+/**
+ * Plots a path.
+ *
+ * Path plot consisting of cubic Bezier curves. Line and fill colour is
+ * controlled by the plot style.
+ *
+ * \param ctx The current redraw context.
+ * \param pstyle Style controlling the path plot.
+ * \param p elements of path
+ * \param n nunber of elements on path
+ * \param width The width of the path
+ * \param transform A transform to apply to the path.
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_path(const struct redraw_context *ctx,
+ const plot_style_t *pstyle,
+ const float *p,
+ unsigned int n,
+ float width,
+ const float transform[6])
{
- static const draw_line_style line_style = { draw_JOIN_MITRED,
- draw_CAP_BUTT, draw_CAP_BUTT, 0, 0x7fffffff,
- 0, 0, 0, 0 };
+ static const draw_line_style line_style = {
+ draw_JOIN_MITRED,
+ draw_CAP_BUTT,
+ draw_CAP_BUTT,
+ 0, 0x7fffffff,
+ 0, 0, 0, 0
+ };
int *path = 0;
unsigned int i;
os_trfm trfm;
os_error *error;
- if (n == 0)
- return true;
+ if (n == 0) {
+ return NSERROR_OK;
+ }
if (p[0] != PLOTTER_PATH_MOVE) {
LOG("path doesn't start with a move");
@@ -303,222 +542,159 @@ bool ro_plot_path(const float *p, unsigned int n, colour fill, float width,
trfm.entries[2][0] = (ro_plot_origin_x + transform[4] * 2) * 256;
trfm.entries[2][1] = (ro_plot_origin_y - transform[5] * 2) * 256;
- if (fill != NS_TRANSPARENT) {
- error = xcolourtrans_set_gcol(fill << 8, 0,
+ if (pstyle->fill_colour != NS_TRANSPARENT) {
+ error = xcolourtrans_set_gcol(pstyle->fill_colour << 8, 0,
os_ACTION_OVERWRITE, 0, 0);
if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
goto error;
}
error = xdraw_fill((draw_path *) path, 0, &trfm, 0);
if (error) {
- LOG("xdraw_stroke: 0x%x: %s", error->errnum, error->errmess);
+ LOG("xdraw_stroke: 0x%x: %s",
+ error->errnum, error->errmess);
goto error;
}
}
- if (c != NS_TRANSPARENT) {
- error = xcolourtrans_set_gcol(c << 8, 0,
+ if (pstyle->stroke_colour != NS_TRANSPARENT) {
+ error = xcolourtrans_set_gcol(pstyle->stroke_colour << 8, 0,
os_ACTION_OVERWRITE, 0, 0);
if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
+ LOG("xcolourtrans_set_gcol: 0x%x: %s",
+ error->errnum, error->errmess);
goto error;
}
error = xdraw_stroke((draw_path *) path, 0, &trfm, 0,
width * 2 * 256, &line_style, 0);
if (error) {
- LOG("xdraw_stroke: 0x%x: %s", error->errnum, error->errmess);
+ LOG("xdraw_stroke: 0x%x: %s",
+ error->errnum, error->errmess);
goto error;
}
}
free(path);
- return true;
+ return NSERROR_OK;
error:
free(path);
- return false;
+ return NSERROR_INVALID;
}
-
-
-bool ro_plot_clip(const struct rect *clip)
+/**
+ * Plot a bitmap
+ *
+ * Tiled plot of a bitmap image. (x,y) gives the top left
+ * coordinate of an explicitly placed tile. From this tile the
+ * image can repeat in all four directions -- up, down, left
+ * and right -- to the extents given by the current clip
+ * rectangle.
+ *
+ * The bitmap_flags say whether to tile in the x and y
+ * directions. If not tiling in x or y directions, the single
+ * image is plotted. The width and height give the dimensions
+ * the image is to be scaled to.
+ *
+ * \param ctx The current redraw context.
+ * \param bitmap The bitmap to plot
+ * \param x The x coordinate to plot the bitmap
+ * \param y The y coordiante to plot the bitmap
+ * \param width The width of area to plot the bitmap into
+ * \param height The height of area to plot the bitmap into
+ * \param bg the background colour to alpha blend into
+ * \param flags the flags controlling the type of plot operation
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_bitmap(const struct redraw_context *ctx,
+ struct bitmap *bitmap,
+ int x, int y,
+ int width,
+ int height,
+ colour bg,
+ bitmap_flags_t flags)
{
- os_error *error;
- char buf[12];
-
- int clip_x0 = ro_plot_origin_x + clip->x0 * 2;
- int clip_y0 = ro_plot_origin_y - clip->y0 * 2 - 1;
- int clip_x1 = ro_plot_origin_x + clip->x1 * 2 - 1;
- int clip_y1 = ro_plot_origin_y - clip->y1 * 2;
+ const uint8_t *buffer;
- if (clip_x1 < clip_x0 || clip_y0 < clip_y1) {
- LOG("bad clip rectangle %i %i %i %i", clip_x0, clip_y0, clip_x1, clip_y1);
- return false;
+ buffer = riscos_bitmap_get_buffer(bitmap);
+ if (!buffer) {
+ LOG("bitmap_get_buffer failed");
+ return NSERROR_INVALID;
}
- buf[0] = os_VDU_SET_GRAPHICS_WINDOW;
- buf[1] = clip_x0;
- buf[2] = clip_x0 >> 8;
- buf[3] = clip_y1;
- buf[4] = clip_y1 >> 8;
- buf[5] = clip_x1;
- buf[6] = clip_x1 >> 8;
- buf[7] = clip_y0;
- buf[8] = clip_y0 >> 8;
-
- error = xos_writen(buf, 9);
- if (error) {
- LOG("xos_writen: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ if (!image_redraw(bitmap->sprite_area,
+ ro_plot_origin_x + x * 2,
+ ro_plot_origin_y - y * 2,
+ width, height,
+ bitmap->width,
+ bitmap->height,
+ bg,
+ flags & BITMAPF_REPEAT_X, flags & BITMAPF_REPEAT_Y,
+ flags & BITMAPF_REPEAT_X || flags & BITMAPF_REPEAT_Y,
+ riscos_bitmap_get_opaque(bitmap) ? IMAGE_PLOT_TINCT_OPAQUE :
+ IMAGE_PLOT_TINCT_ALPHA)) {
+ return NSERROR_INVALID;
}
-
- return true;
+ return NSERROR_OK;
}
-bool ro_plot_text(int x, int y, const char *text, size_t length,
- const plot_font_style_t *fstyle)
+/**
+ * Text plotting.
+ *
+ * \param ctx The current redraw context.
+ * \param fstyle plot style for this text
+ * \param x x coordinate
+ * \param y y coordinate
+ * \param text UTF-8 string to plot
+ * \param length length of string, in bytes
+ * \return NSERROR_OK on success else error code.
+ */
+static nserror
+ro_plot_text(const struct redraw_context *ctx,
+ const struct plot_font_style *fstyle,
+ int x,
+ int y,
+ const char *text,
+ size_t length)
{
os_error *error;
error = xcolourtrans_set_font_colours(font_CURRENT,
- fstyle->background << 8, fstyle->foreground << 8,
+ fstyle->background << 8, fstyle->foreground << 8,
14, 0, 0, 0);
if (error) {
- LOG("xcolourtrans_set_font_colours: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ LOG("xcolourtrans_set_font_colours: 0x%x: %s",
+ error->errnum, error->errmess);
+ return NSERROR_INVALID;
}
- return nsfont_paint(fstyle, text, length,
+ if (!nsfont_paint(fstyle, text, length,
ro_plot_origin_x + x * 2,
- ro_plot_origin_y - y * 2);
-}
-
-
-bool ro_plot_disc(int x, int y, int radius, const plot_style_t *style)
-{
- os_error *error;
- if (style->fill_type != PLOT_OP_TYPE_NONE) {
- error = xcolourtrans_set_gcol(style->fill_colour << 8, 0,
- os_ACTION_OVERWRITE, 0, 0);
- if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
- error = xos_plot(os_MOVE_TO,
- ro_plot_origin_x + x * 2,
- ro_plot_origin_y - y * 2);
- if (error) {
- LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
- error = xos_plot(os_PLOT_CIRCLE | os_PLOT_BY, radius * 2, 0);
- if (error) {
- LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
- }
-
- if (style->stroke_type != PLOT_OP_TYPE_NONE) {
-
- error = xcolourtrans_set_gcol(style->stroke_colour << 8, 0,
- os_ACTION_OVERWRITE, 0, 0);
- if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
- error = xos_plot(os_MOVE_TO,
- ro_plot_origin_x + x * 2,
- ro_plot_origin_y - y * 2);
- if (error) {
- LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
- error = xos_plot(os_PLOT_CIRCLE_OUTLINE | os_PLOT_BY,
- radius * 2, 0);
-
- if (error) {
- LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
- }
- return true;
-}
-
-bool ro_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *style)
-{
- os_error *error;
- int sx, sy, ex, ey;
- double t;
-
- x = ro_plot_origin_x + x * 2;
- y = ro_plot_origin_y - y * 2;
- radius <<= 1;
-
- error = xcolourtrans_set_gcol(style->fill_colour << 8, 0,
- os_ACTION_OVERWRITE, 0, 0);
-
- if (error) {
- LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
-
- t = ((double)angle1 * M_PI) / 180.0;
- sx = (x + (int)(radius * cos(t)));
- sy = (y + (int)(radius * sin(t)));
-
- t = ((double)angle2 * M_PI) / 180.0;
- ex = (x + (int)(radius * cos(t)));
- ey = (y + (int)(radius * sin(t)));
-
- error = xos_plot(os_MOVE_TO, x, y); /* move to centre */
- if (error) {
- LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
-
- error = xos_plot(os_MOVE_TO, sx, sy); /* move to start */
- if (error) {
- LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
- }
-
- error = xos_plot(os_PLOT_ARC | os_PLOT_TO, ex, ey); /* arc to end */
- if (error) {
- LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
- return false;
+ ro_plot_origin_y - y * 2)) {
+ return NSERROR_INVALID;
}
-
- return true;
+ return NSERROR_OK;
}
-
-bool ro_plot_bitmap(int x, int y, int width, int height,
- struct bitmap *bitmap, colour bg,
- bitmap_flags_t flags)
-{
- const uint8_t *buffer;
-
- buffer = riscos_bitmap_get_buffer(bitmap);
- if (!buffer) {
- LOG("bitmap_get_buffer failed");
- return false;
- }
-
- return image_redraw(bitmap->sprite_area,
- ro_plot_origin_x + x * 2,
- ro_plot_origin_y - y * 2,
- width, height,
- bitmap->width,
- bitmap->height,
- bg,
- flags & BITMAPF_REPEAT_X, flags & BITMAPF_REPEAT_Y,
- flags & BITMAPF_REPEAT_X || flags & BITMAPF_REPEAT_Y,
- riscos_bitmap_get_opaque(bitmap) ? IMAGE_PLOT_TINCT_OPAQUE :
- IMAGE_PLOT_TINCT_ALPHA);
-}
+/**
+ * RISC OS plotter operation table
+ */
+const struct plotter_table ro_plotters = {
+ .rectangle = ro_plot_rectangle,
+ .line = ro_plot_line,
+ .polygon = ro_plot_polygon,
+ .clip = ro_plot_clip,
+ .text = ro_plot_text,
+ .disc = ro_plot_disc,
+ .arc = ro_plot_arc,
+ .bitmap = ro_plot_bitmap,
+ .path = ro_plot_path,
+ .option_knockout = true,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 22:45:12 +0000