| /* |
| * 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 "glheader.h" |
| #include "context.h" |
| #include "imports.h" |
| #include "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); |
| } |
| } |
