diff options
Diffstat (limited to 'mesalib/src/mesa/swrast/s_span.h')
| -rw-r--r-- | mesalib/src/mesa/swrast/s_span.h | 441 |
1 files changed, 223 insertions, 218 deletions
diff --git a/mesalib/src/mesa/swrast/s_span.h b/mesalib/src/mesa/swrast/s_span.h index aaf1fec2a..d3cce304f 100644 --- a/mesalib/src/mesa/swrast/s_span.h +++ b/mesalib/src/mesa/swrast/s_span.h @@ -1,218 +1,223 @@ -/* - * Mesa 3-D graphics library - * Version: 7.5 - * - * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. - * Copyright (C) 2009 VMware, Inc. All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#ifndef S_SPAN_H -#define S_SPAN_H - - -#include "swrast.h" - - -/** - * \defgroup SpanFlags - * Special bitflags to describe span data. - * - * In general, the point/line/triangle functions interpolate/emit the - * attributes specified by swrast->_ActiveAttribs (i.e. FRAT_BIT_* values). - * Some things don't fit into that, though, so we have these flags. - */ -/*@{*/ -#define SPAN_RGBA 0x01 /**< interpMask and arrayMask */ -#define SPAN_Z 0x02 /**< interpMask and arrayMask */ -#define SPAN_FLAT 0x04 /**< interpMask: flat shading? */ -#define SPAN_XY 0x08 /**< array.x[], y[] valid? */ -#define SPAN_MASK 0x10 /**< was array.mask[] filled in by caller? */ -#define SPAN_LAMBDA 0x20 /**< array.lambda[] valid? */ -#define SPAN_COVERAGE 0x40 /**< array.coverage[] valid? */ -/*@}*/ - - -/** - * \sw_span_arrays - * \brief Arrays of fragment values. - * - * These will either be computed from the span x/xStep values or - * filled in by glDraw/CopyPixels, etc. - * These arrays are separated out of sw_span to conserve memory. - */ -typedef struct sw_span_arrays -{ - /** Per-fragment attributes (indexed by FRAG_ATTRIB_* tokens) */ - /* XXX someday look at transposing first two indexes for better memory - * access pattern. - */ - GLfloat attribs[FRAG_ATTRIB_MAX][MAX_WIDTH][4]; - - /** This mask indicates which fragments are alive or culled */ - GLubyte mask[MAX_WIDTH]; - - GLenum ChanType; /**< Color channel type, GL_UNSIGNED_BYTE, GL_FLOAT */ - - /** Attribute arrays that don't fit into attribs[] array above */ - /*@{*/ - GLubyte rgba8[MAX_WIDTH][4]; - GLushort rgba16[MAX_WIDTH][4]; - GLchan (*rgba)[4]; /** either == rgba8 or rgba16 */ - GLint x[MAX_WIDTH]; /**< fragment X coords */ - GLint y[MAX_WIDTH]; /**< fragment Y coords */ - GLuint z[MAX_WIDTH]; /**< fragment Z coords */ - GLuint index[MAX_WIDTH]; /**< Color indexes */ - GLfloat lambda[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH]; /**< Texture LOD */ - GLfloat coverage[MAX_WIDTH]; /**< Fragment coverage for AA/smoothing */ - /*@}*/ -} SWspanarrays; - - -/** - * The SWspan structure describes the colors, Z, fogcoord, texcoords, - * etc for either a horizontal run or an array of independent pixels. - * We can either specify a base/step to indicate interpolated values, or - * fill in explicit arrays of values. The interpMask and arrayMask bitfields - * indicate which attributes are active interpolants or arrays, respectively. - * - * It would be interesting to experiment with multiprocessor rasterization - * with this structure. The triangle rasterizer could simply emit a - * stream of these structures which would be consumed by one or more - * span-processing threads which could run in parallel. - */ -typedef struct sw_span -{ - /** Coord of first fragment in horizontal span/run */ - GLint x, y; - - /** Number of fragments in the span */ - GLuint end; - - /** for clipping left edge of spans */ - GLuint leftClip; - - /** This flag indicates that mask[] array is effectively filled with ones */ - GLboolean writeAll; - - /** either GL_POLYGON, GL_LINE, GL_POLYGON, GL_BITMAP */ - GLenum primitive; - - /** 0 = front-facing span, 1 = back-facing span (for two-sided stencil) */ - GLuint facing; - - /** - * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates - * which of the attrStart/StepX/StepY variables are relevant. - */ - GLbitfield interpMask; - - /** Fragment attribute interpolants */ - GLfloat attrStart[FRAG_ATTRIB_MAX][4]; /**< initial value */ - GLfloat attrStepX[FRAG_ATTRIB_MAX][4]; /**< dvalue/dx */ - GLfloat attrStepY[FRAG_ATTRIB_MAX][4]; /**< dvalue/dy */ - - /* XXX the rest of these will go away eventually... */ - - /* For horizontal spans, step is the partial derivative wrt X. - * For lines, step is the delta from one fragment to the next. - */ - GLfixed red, redStep; - GLfixed green, greenStep; - GLfixed blue, blueStep; - GLfixed alpha, alphaStep; - GLfixed index, indexStep; - GLfixed z, zStep; /**< XXX z should probably be GLuint */ - GLfixed intTex[2], intTexStep[2]; /**< (s,t) for unit[0] only */ - - /** - * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates - * which of the fragment arrays in the span_arrays struct are relevant. - */ - GLbitfield arrayMask; - - GLbitfield arrayAttribs; - - /** - * We store the arrays of fragment values in a separate struct so - * that we can allocate sw_span structs on the stack without using - * a lot of memory. The span_arrays struct is about 1.4MB while the - * sw_span struct is only about 512 bytes. - */ - SWspanarrays *array; -} SWspan; - - - -#define INIT_SPAN(S, PRIMITIVE) \ -do { \ - (S).primitive = (PRIMITIVE); \ - (S).interpMask = 0x0; \ - (S).arrayMask = 0x0; \ - (S).arrayAttribs = 0x0; \ - (S).end = 0; \ - (S).leftClip = 0; \ - (S).facing = 0; \ - (S).array = SWRAST_CONTEXT(ctx)->SpanArrays; \ -} while (0) - - - -extern void -_swrast_span_default_attribs(GLcontext *ctx, SWspan *span); - -extern void -_swrast_span_interpolate_z( const GLcontext *ctx, SWspan *span ); - -extern GLfloat -_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy, - GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH, - GLfloat s, GLfloat t, GLfloat q, GLfloat invQ); - - -extern void -_swrast_write_rgba_span( GLcontext *ctx, SWspan *span); - - -extern void -_swrast_read_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint n, GLint x, GLint y, GLenum type, GLvoid *rgba); - -extern void -_swrast_get_values(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, const GLint x[], const GLint y[], - void *values, GLuint valueSize); - -extern void -_swrast_put_row(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - const GLvoid *values, GLuint valueSize); - -extern void -_swrast_get_row(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint count, GLint x, GLint y, - GLvoid *values, GLuint valueSize); - - -extern void * -_swrast_get_dest_rgba(GLcontext *ctx, struct gl_renderbuffer *rb, - SWspan *span); - -#endif +/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_SPAN_H
+#define S_SPAN_H
+
+
+#include "main/config.h"
+#include "main/glheader.h"
+#include "main/mtypes.h"
+
+struct gl_context;
+struct gl_renderbuffer;
+
+
+/**
+ * \defgroup SpanFlags
+ * Special bitflags to describe span data.
+ *
+ * In general, the point/line/triangle functions interpolate/emit the
+ * attributes specified by swrast->_ActiveAttribs (i.e. FRAT_BIT_* values).
+ * Some things don't fit into that, though, so we have these flags.
+ */
+/*@{*/
+#define SPAN_RGBA 0x01 /**< interpMask and arrayMask */
+#define SPAN_Z 0x02 /**< interpMask and arrayMask */
+#define SPAN_FLAT 0x04 /**< interpMask: flat shading? */
+#define SPAN_XY 0x08 /**< array.x[], y[] valid? */
+#define SPAN_MASK 0x10 /**< was array.mask[] filled in by caller? */
+#define SPAN_LAMBDA 0x20 /**< array.lambda[] valid? */
+#define SPAN_COVERAGE 0x40 /**< array.coverage[] valid? */
+/*@}*/
+
+
+/**
+ * \sw_span_arrays
+ * \brief Arrays of fragment values.
+ *
+ * These will either be computed from the span x/xStep values or
+ * filled in by glDraw/CopyPixels, etc.
+ * These arrays are separated out of sw_span to conserve memory.
+ */
+typedef struct sw_span_arrays
+{
+ /** Per-fragment attributes (indexed by FRAG_ATTRIB_* tokens) */
+ /* XXX someday look at transposing first two indexes for better memory
+ * access pattern.
+ */
+ GLfloat attribs[FRAG_ATTRIB_MAX][MAX_WIDTH][4];
+
+ /** This mask indicates which fragments are alive or culled */
+ GLubyte mask[MAX_WIDTH];
+
+ GLenum ChanType; /**< Color channel type, GL_UNSIGNED_BYTE, GL_FLOAT */
+
+ /** Attribute arrays that don't fit into attribs[] array above */
+ /*@{*/
+ GLubyte rgba8[MAX_WIDTH][4];
+ GLushort rgba16[MAX_WIDTH][4];
+ GLchan (*rgba)[4]; /** either == rgba8 or rgba16 */
+ GLint x[MAX_WIDTH]; /**< fragment X coords */
+ GLint y[MAX_WIDTH]; /**< fragment Y coords */
+ GLuint z[MAX_WIDTH]; /**< fragment Z coords */
+ GLuint index[MAX_WIDTH]; /**< Color indexes */
+ GLfloat lambda[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH]; /**< Texture LOD */
+ GLfloat coverage[MAX_WIDTH]; /**< Fragment coverage for AA/smoothing */
+ /*@}*/
+} SWspanarrays;
+
+
+/**
+ * The SWspan structure describes the colors, Z, fogcoord, texcoords,
+ * etc for either a horizontal run or an array of independent pixels.
+ * We can either specify a base/step to indicate interpolated values, or
+ * fill in explicit arrays of values. The interpMask and arrayMask bitfields
+ * indicate which attributes are active interpolants or arrays, respectively.
+ *
+ * It would be interesting to experiment with multiprocessor rasterization
+ * with this structure. The triangle rasterizer could simply emit a
+ * stream of these structures which would be consumed by one or more
+ * span-processing threads which could run in parallel.
+ */
+typedef struct sw_span
+{
+ /** Coord of first fragment in horizontal span/run */
+ GLint x, y;
+
+ /** Number of fragments in the span */
+ GLuint end;
+
+ /** for clipping left edge of spans */
+ GLuint leftClip;
+
+ /** This flag indicates that mask[] array is effectively filled with ones */
+ GLboolean writeAll;
+
+ /** either GL_POLYGON, GL_LINE, GL_POLYGON, GL_BITMAP */
+ GLenum primitive;
+
+ /** 0 = front-facing span, 1 = back-facing span (for two-sided stencil) */
+ GLuint facing;
+
+ /**
+ * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates
+ * which of the attrStart/StepX/StepY variables are relevant.
+ */
+ GLbitfield interpMask;
+
+ /** Fragment attribute interpolants */
+ GLfloat attrStart[FRAG_ATTRIB_MAX][4]; /**< initial value */
+ GLfloat attrStepX[FRAG_ATTRIB_MAX][4]; /**< dvalue/dx */
+ GLfloat attrStepY[FRAG_ATTRIB_MAX][4]; /**< dvalue/dy */
+
+ /* XXX the rest of these will go away eventually... */
+
+ /* For horizontal spans, step is the partial derivative wrt X.
+ * For lines, step is the delta from one fragment to the next.
+ */
+ GLfixed red, redStep;
+ GLfixed green, greenStep;
+ GLfixed blue, blueStep;
+ GLfixed alpha, alphaStep;
+ GLfixed index, indexStep;
+ GLfixed z, zStep; /**< XXX z should probably be GLuint */
+ GLfixed intTex[2], intTexStep[2]; /**< (s,t) for unit[0] only */
+
+ /**
+ * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates
+ * which of the fragment arrays in the span_arrays struct are relevant.
+ */
+ GLbitfield arrayMask;
+
+ GLbitfield arrayAttribs;
+
+ /**
+ * We store the arrays of fragment values in a separate struct so
+ * that we can allocate sw_span structs on the stack without using
+ * a lot of memory. The span_arrays struct is about 1.4MB while the
+ * sw_span struct is only about 512 bytes.
+ */
+ SWspanarrays *array;
+} SWspan;
+
+
+
+#define INIT_SPAN(S, PRIMITIVE) \
+do { \
+ (S).primitive = (PRIMITIVE); \
+ (S).interpMask = 0x0; \
+ (S).arrayMask = 0x0; \
+ (S).arrayAttribs = 0x0; \
+ (S).end = 0; \
+ (S).leftClip = 0; \
+ (S).facing = 0; \
+ (S).array = SWRAST_CONTEXT(ctx)->SpanArrays; \
+} while (0)
+
+
+
+extern void
+_swrast_span_default_attribs(struct gl_context *ctx, SWspan *span);
+
+extern void
+_swrast_span_interpolate_z( const struct gl_context *ctx, SWspan *span );
+
+extern GLfloat
+_swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
+ GLfloat dqdx, GLfloat dqdy, GLfloat texW, GLfloat texH,
+ GLfloat s, GLfloat t, GLfloat q, GLfloat invQ);
+
+
+extern void
+_swrast_write_rgba_span( struct gl_context *ctx, SWspan *span);
+
+
+extern void
+_swrast_read_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLenum type, GLvoid *rgba);
+
+extern void
+_swrast_get_values(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, const GLint x[], const GLint y[],
+ void *values, GLuint valueSize);
+
+extern void
+_swrast_put_row(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ const GLvoid *values, GLuint valueSize);
+
+extern void
+_swrast_get_row(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint count, GLint x, GLint y,
+ GLvoid *values, GLuint valueSize);
+
+
+extern void *
+_swrast_get_dest_rgba(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ SWspan *span);
+
+#endif
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