diff options
Diffstat (limited to 'mesalib/src/mesa/swrast/s_logic.c')
| -rw-r--r-- | mesalib/src/mesa/swrast/s_logic.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/mesalib/src/mesa/swrast/s_logic.c b/mesalib/src/mesa/swrast/s_logic.c new file mode 100644 index 000000000..f0274b4c0 --- /dev/null +++ b/mesalib/src/mesa/swrast/s_logic.c @@ -0,0 +1,246 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5.2 + * + * Copyright (C) 1999-2006 Brian Paul 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. + */ + + +#include "main/glheader.h" +#include "main/context.h" +#include "main/imports.h" +#include "main/macros.h" + +#include "s_context.h" +#include "s_logic.h" +#include "s_span.h" + + +/** + * We do all logic ops on 4-byte GLuints. + * Depending on bytes per pixel, the mask array elements correspond to + * 1, 2 or 4 GLuints. + */ +#define LOGIC_OP_LOOP(MODE, MASKSTRIDE) \ +do { \ + GLuint i; \ + switch (MODE) { \ + case GL_CLEAR: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = 0; \ + } \ + } \ + break; \ + case GL_SET: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~0; \ + } \ + } \ + break; \ + case GL_COPY: \ + /* do nothing */ \ + break; \ + case GL_COPY_INVERTED: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~src[i]; \ + } \ + } \ + break; \ + case GL_NOOP: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = dest[i]; \ + } \ + } \ + break; \ + case GL_INVERT: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~dest[i]; \ + } \ + } \ + break; \ + case GL_AND: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] &= dest[i]; \ + } \ + } \ + break; \ + case GL_NAND: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~(src[i] & dest[i]); \ + } \ + } \ + break; \ + case GL_OR: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] |= dest[i]; \ + } \ + } \ + break; \ + case GL_NOR: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~(src[i] | dest[i]); \ + } \ + } \ + break; \ + case GL_XOR: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] ^= dest[i]; \ + } \ + } \ + break; \ + case GL_EQUIV: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~(src[i] ^ dest[i]); \ + } \ + } \ + break; \ + case GL_AND_REVERSE: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = src[i] & ~dest[i]; \ + } \ + } \ + break; \ + case GL_AND_INVERTED: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~src[i] & dest[i]; \ + } \ + } \ + break; \ + case GL_OR_REVERSE: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = src[i] | ~dest[i]; \ + } \ + } \ + break; \ + case GL_OR_INVERTED: \ + for (i = 0; i < n; i++) { \ + if (mask[i / MASKSTRIDE]) { \ + src[i] = ~src[i] | dest[i]; \ + } \ + } \ + break; \ + default: \ + _mesa_problem(ctx, "bad logicop mode");\ + } \ +} while (0) + + + +static INLINE void +logicop_uint1(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[], + const GLubyte mask[]) +{ + LOGIC_OP_LOOP(ctx->Color.LogicOp, 1); +} + + +static INLINE void +logicop_uint2(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[], + const GLubyte mask[]) +{ + LOGIC_OP_LOOP(ctx->Color.LogicOp, 2); +} + + +static INLINE void +logicop_uint4(GLcontext *ctx, GLuint n, GLuint src[], const GLuint dest[], + const GLubyte mask[]) +{ + LOGIC_OP_LOOP(ctx->Color.LogicOp, 4); +} + + + +/* + * Apply the current logic operator to a span of CI pixels. This is only + * used if the device driver can't do logic ops. + */ +void +_swrast_logicop_ci_span(GLcontext *ctx, struct gl_renderbuffer *rb, + SWspan *span) +{ + GLuint dest[MAX_WIDTH]; + GLuint *index = span->array->index; + + ASSERT(span->end < MAX_WIDTH); + ASSERT(rb->DataType == GL_UNSIGNED_INT); + + /* Read dest values from frame buffer */ + if (span->arrayMask & SPAN_XY) { + _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y, + dest, sizeof(GLuint)); + } + else { + rb->GetRow(ctx, rb, span->end, span->x, span->y, dest); + } + + logicop_uint1(ctx, span->end, index, dest, span->array->mask); +} + + +/** + * Apply the current logic operator to a span of RGBA pixels. + * We can handle horizontal runs of pixels (spans) or arrays of x/y + * pixel coordinates. + */ +void +_swrast_logicop_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb, + SWspan *span) +{ + void *rbPixels; + + ASSERT(span->end < MAX_WIDTH); + ASSERT(span->arrayMask & SPAN_RGBA); + ASSERT(rb->DataType == span->array->ChanType); + + rbPixels = _swrast_get_dest_rgba(ctx, rb, span); + + if (span->array->ChanType == GL_UNSIGNED_BYTE) { + /* treat 4*GLubyte as GLuint */ + logicop_uint1(ctx, span->end, + (GLuint *) span->array->rgba8, + (const GLuint *) rbPixels, span->array->mask); + } + else if (span->array->ChanType == GL_UNSIGNED_SHORT) { + /* treat 2*GLushort as GLuint */ + logicop_uint2(ctx, 2 * span->end, + (GLuint *) span->array->rgba16, + (const GLuint *) rbPixels, span->array->mask); + } + else { + logicop_uint4(ctx, 4 * span->end, + (GLuint *) span->array->attribs[FRAG_ATTRIB_COL0], + (const GLuint *) rbPixels, span->array->mask); + } +} |