From e4b2356c07d31fbeeabb13b2fb47db703b473080 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 4 May 2005 20:11:35 +0000 Subject: Major check-in of changes for GL_EXT_framebuffer_object extension. Main driver impacts: - new code for creating the Mesa GLframebuffer - new span/pixel read/write code Some drivers not yet updated/tested. --- src/mesa/swrast/s_stencil.c | 417 +++++++++++++++----------------------------- 1 file changed, 145 insertions(+), 272 deletions(-) (limited to 'src/mesa/swrast/s_stencil.c') diff --git a/src/mesa/swrast/s_stencil.c b/src/mesa/swrast/s_stencil.c index 38182ad613..8481877171 100644 --- a/src/mesa/swrast/s_stencil.c +++ b/src/mesa/swrast/s_stencil.c @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.1 + * Version: 6.3 * - * Copyright (C) 1999-2004 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2005 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"), @@ -27,6 +27,7 @@ #include "context.h" #include "macros.h" #include "imports.h" +#include "fbobject.h" #include "s_context.h" #include "s_depth.h" @@ -50,14 +51,6 @@ ENDIF */ -/* - * Return the address of a stencil buffer value given the window coords: - */ -#define STENCIL_ADDRESS(X,Y) \ - (ctx->DrawBuffer->Stencil + ctx->DrawBuffer->Width * (Y) + (X)) - - - /** * Apply the given stencil operator to the array of stencil values. * Don't touch stencil[i] if mask[i] is zero. @@ -415,7 +408,8 @@ do_stencil_test( GLcontext *ctx, GLuint face, GLuint n, GLstencil stencil[], static GLboolean stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face) { - SWcontext *swrast = SWRAST_CONTEXT(ctx); + struct gl_framebuffer *fb = ctx->DrawBuffer; + struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer; GLstencil stencilRow[MAX_WIDTH]; GLstencil *stencil; const GLuint n = span->end; @@ -431,19 +425,13 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face) ASSERT(span->arrayMask & SPAN_Z); } #endif - - /* Get initial stencil values */ - if (swrast->Driver.WriteStencilSpan) { - /* Get stencil values from the hardware stencil buffer */ - ASSERT(swrast->Driver.ReadStencilSpan); - (*swrast->Driver.ReadStencilSpan)(ctx, n, x, y, stencilRow); + + stencil = rb->GetPointer(ctx, rb, x, y); + if (!stencil) { + rb->GetRow(ctx, rb, n, x, y, stencilRow); stencil = stencilRow; } - else { - /* Get pointer into software stencil buffer */ - stencil = STENCIL_ADDRESS(x, y); - } - + /* * Apply the stencil test to the fragments. * failMask[i] is 1 if the stencil test failed. @@ -507,9 +495,8 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face) /* * Write updated stencil values back into hardware stencil buffer. */ - if (swrast->Driver.WriteStencilSpan) { - ASSERT(stencil == stencilRow); - (swrast->Driver.WriteStencilSpan)(ctx, n, x, y, stencil, mask ); + if (!rb->GetPointer(ctx, rb, 0, 0)) { + rb->PutRow(ctx, rb, n, x, y, stencil, mask); } span->writeAll = GL_FALSE; @@ -519,6 +506,12 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face) +/* + * Return the address of a stencil buffer value given the window coords: + */ +#define STENCIL_ADDRESS(X, Y) (stencilStart + (Y) * stride + (X)) + + /** * Apply the given stencil operator for each pixel in the array whose @@ -530,16 +523,21 @@ stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span, GLuint face) * mask - array [n] of flag: 1=apply operator, 0=don't apply operator */ static void -apply_stencil_op_to_pixels( const GLcontext *ctx, +apply_stencil_op_to_pixels( GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], GLenum oper, GLuint face, const GLubyte mask[] ) { + struct gl_framebuffer *fb = ctx->DrawBuffer; + struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer; const GLstencil ref = ctx->Stencil.Ref[face]; const GLstencil wrtmask = ctx->Stencil.WriteMask[face]; const GLstencil invmask = (GLstencil) (~wrtmask); GLuint i; + GLstencil *stencilStart = (GLubyte *) rb->Data; + const GLuint stride = rb->Width; - ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan); /* software stencil buffer only! */ + ASSERT(rb->GetPointer(ctx, rb, 0, 0)); + ASSERT(sizeof(GLstencil) == 1); switch (oper) { case GL_KEEP: @@ -701,16 +699,18 @@ static GLboolean stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n, const GLint x[], const GLint y[], GLubyte mask[] ) { + const struct gl_framebuffer *fb = ctx->DrawBuffer; + struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer; GLubyte fail[MAX_WIDTH]; GLstencil r, s; GLuint i; GLboolean allfail = GL_FALSE; const GLuint valueMask = ctx->Stencil.ValueMask[face]; + const GLstencil *stencilStart = (GLstencil *) rb->Data; + const GLuint stride = rb->Width; - /* software stencil buffer only! */ - ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer); - ASSERT(!SWRAST_CONTEXT(ctx)->Driver.ReadStencilSpan); - ASSERT(!SWRAST_CONTEXT(ctx)->Driver.WriteStencilSpan); + ASSERT(rb->GetPointer(ctx, rb, 0, 0)); + ASSERT(sizeof(GLstencil) == 1); /* * Perform stencil test. The results of this operation are stored @@ -740,7 +740,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n, r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); for (i=0;iStencil.Ref[face] & valueMask); for (i=0;iStencil.Ref[face] & valueMask); for (i=0;i s) { /* passed */ @@ -800,7 +800,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n, r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); for (i=0;i= s) { /* passed */ @@ -820,7 +820,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n, r = (GLstencil) (ctx->Stencil.Ref[face] & valueMask); for (i=0;iStencil.Ref[face] & valueMask); for (i=0;iDrawBuffer; + struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer; const GLuint n = span->end; const GLint *x = span->array->x; const GLint *y = span->array->y; GLubyte *mask = span->array->mask; - SWcontext *swrast = SWRAST_CONTEXT(ctx); ASSERT(span->arrayMask & SPAN_XY); ASSERT(ctx->Stencil.Enabled); ASSERT(n <= MAX_WIDTH); - if (swrast->Driver.WriteStencilPixels) { - /*** Hardware stencil buffer ***/ + if (!rb->GetPointer(ctx, rb, 0, 0)) { + /* No direct access */ GLstencil stencil[MAX_WIDTH]; GLubyte origMask[MAX_WIDTH]; - ASSERT(!ctx->DrawBuffer->UseSoftwareStencilBuffer); - ASSERT(swrast->Driver.ReadStencilPixels); - (*swrast->Driver.ReadStencilPixels)(ctx, n, x, y, stencil); + rb->GetValues(ctx, rb, n, x, y, stencil); MEMCPY(origMask, mask, n * sizeof(GLubyte)); @@ -950,14 +949,12 @@ stencil_and_ztest_pixels( GLcontext *ctx, struct sw_span *span, GLuint face ) } /* Write updated stencil values into hardware stencil buffer */ - (swrast->Driver.WriteStencilPixels)(ctx, n, x, y, stencil, origMask); + rb->PutValues(ctx, rb, n, x, y, stencil, origMask); return GL_TRUE; } else { - /*** Software stencil buffer ***/ - - ASSERT(ctx->DrawBuffer->UseSoftwareStencilBuffer); + /* Direct access to stencil buffer */ if (stencil_test_pixels(ctx, face, n, x, y, mask) == GL_FALSE) { /* all fragments failed the stencil test, we're done. */ @@ -1015,6 +1012,39 @@ _swrast_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span) } +#if 0 +GLuint +clip_span(GLuint bufferWidth, GLuint bufferHeight, + GLint x, GLint y, GLuint *count) +{ + GLuint n = *count; + GLuint skipPixels = 0; + + if (y < 0 || y >= bufferHeight || x + n <= 0 || x >= bufferWidth) { + /* totally out of bounds */ + n = 0; + } + else { + /* left clip */ + if (x < 0) { + skipPixels = -x; + x = 0; + n -= skipPixels; + } + /* right clip */ + if (x + n > bufferWidth) { + GLint dx = x + n - bufferWidth; + n -= dx; + } + } + + *count = n; + + return skipPixels; +} +#endif + + /** * Return a span of stencil values from the stencil buffer. * Used for glRead/CopyPixels @@ -1023,14 +1053,10 @@ _swrast_stencil_and_ztest_span(GLcontext *ctx, struct sw_span *span) * Output: stencil - the array of stencil values */ void -_swrast_read_stencil_span( GLcontext *ctx, - GLint n, GLint x, GLint y, GLstencil stencil[] ) +_swrast_read_stencil_span(GLcontext *ctx, struct gl_renderbuffer *rb, + GLint n, GLint x, GLint y, GLstencil stencil[]) { - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLint bufWidth = (GLint) ctx->DrawBuffer->Width; - const GLint bufHeight = (GLint) ctx->DrawBuffer->Height; - - if (y < 0 || y >= bufHeight || x + n <= 0 || x >= bufWidth) { + if (y < 0 || y >= rb->Height || x + n <= 0 || x >= rb->Width) { /* span is completely outside framebuffer */ return; /* undefined values OK */ } @@ -1041,29 +1067,15 @@ _swrast_read_stencil_span( GLcontext *ctx, n -= dx; stencil += dx; } - if (x + n > bufWidth) { - GLint dx = x + n - bufWidth; + if (x + n > rb->Width) { + GLint dx = x + n - rb->Width; n -= dx; } if (n <= 0) { return; } - - ASSERT(n >= 0); - if (swrast->Driver.ReadStencilSpan) { - (*swrast->Driver.ReadStencilSpan)( ctx, (GLuint) n, x, y, stencil ); - } - else if (ctx->DrawBuffer->Stencil) { - const GLstencil *s = STENCIL_ADDRESS( x, y ); -#if STENCIL_BITS == 8 - MEMCPY( stencil, s, n * sizeof(GLstencil) ); -#else - GLuint i; - for (i=0;iGetRow(ctx, rb, n, x, y, stencil); } @@ -1076,252 +1088,113 @@ _swrast_read_stencil_span( GLcontext *ctx, * stencil - the array of stencil values */ void -_swrast_write_stencil_span( GLcontext *ctx, GLint n, GLint x, GLint y, - const GLstencil stencil[] ) +_swrast_write_stencil_span(GLcontext *ctx, GLint n, GLint x, GLint y, + const GLstencil stencil[] ) { - SWcontext *swrast = SWRAST_CONTEXT(ctx); - const GLstencil *ssrc = stencil; - const GLint bufWidth = (GLint) ctx->DrawBuffer->Width; - const GLint bufHeight = (GLint) ctx->DrawBuffer->Height; + struct gl_framebuffer *fb = ctx->DrawBuffer; + struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer; - if (y < 0 || y >= bufHeight || x + n <= 0 || x >= bufWidth) { + if (y < 0 || y >= rb->Height || x + n <= 0 || x >= rb->Width) { /* span is completely outside framebuffer */ return; /* undefined values OK */ } - if (x < 0) { GLint dx = -x; x = 0; n -= dx; - ssrc += dx; + stencil += dx; } - if (x + n > bufWidth) { - GLint dx = x + n - bufWidth; + if (x + n > rb->Width) { + GLint dx = x + n - rb->Width; n -= dx; } if (n <= 0) { return; } - if (swrast->Driver.WriteStencilSpan) { - (*swrast->Driver.WriteStencilSpan)( ctx, n, x, y, ssrc, NULL ); - } - else if (ctx->DrawBuffer->Stencil) { - GLstencil *s = STENCIL_ADDRESS( x, y ); -#if STENCIL_BITS == 8 - MEMCPY( s, ssrc, n * sizeof(GLstencil) ); -#else - GLuint i; - for (i=0;iPutRow(ctx, rb, n, x, y, stencil, NULL); } /** - * Allocate a new stencil buffer. If there's an old one it will be - * deallocated first. The new stencil buffer will be uninitialized. + * Clear the stencil buffer. */ void -_swrast_alloc_stencil_buffer( GLframebuffer *buffer ) +_swrast_clear_stencil_buffer( GLcontext *ctx, struct gl_renderbuffer *rb ) { - ASSERT(buffer->UseSoftwareStencilBuffer); - - /* deallocate current stencil buffer if present */ - if (buffer->Stencil) { - MESA_PBUFFER_FREE(buffer->Stencil); - buffer->Stencil = NULL; - } - - /* allocate new stencil buffer */ - buffer->Stencil = (GLstencil *) - MESA_PBUFFER_ALLOC(buffer->Width * buffer->Height * sizeof(GLstencil)); - if (!buffer->Stencil) { - /* out of memory */ - _mesa_error( NULL, GL_OUT_OF_MEMORY, "_swrast_alloc_stencil_buffer" ); - } -} + const GLstencil mask = ctx->Stencil.WriteMask[0]; + const GLstencil invMask = ~mask; + const GLstencil clearVal = (ctx->Stencil.Clear & mask); + GLint x, y, width, height; - - -/** - * Clear the software (malloc'd) stencil buffer. - */ -static void -clear_software_stencil_buffer( GLcontext *ctx ) -{ - if (ctx->Visual.stencilBits==0 || !ctx->DrawBuffer->Stencil) { - /* no stencil buffer */ + if (!rb || mask == 0) return; - } - - if (ctx->Scissor.Enabled) { - /* clear scissor region only */ - const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; - if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) { - /* must apply mask to the clear */ - GLint y; - for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) { - const GLstencil mask = ctx->Stencil.WriteMask[0]; - const GLstencil invMask = ~mask; - const GLstencil clearVal = (ctx->Stencil.Clear & mask); - GLstencil *stencil = STENCIL_ADDRESS( ctx->DrawBuffer->_Xmin, y ); - GLint i; - for (i = 0; i < width; i++) { - stencil[i] = (stencil[i] & invMask) | clearVal; - } - } - } - else { - /* no masking */ - GLint y; - for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) { - GLstencil *stencil = STENCIL_ADDRESS( ctx->DrawBuffer->_Xmin, y ); -#if STENCIL_BITS==8 - MEMSET( stencil, ctx->Stencil.Clear, width * sizeof(GLstencil) ); -#else - GLint i; - for (i = 0; i < width; i++) - stencil[i] = ctx->Stencil.Clear; -#endif - } - } - } - else { - /* clear whole stencil buffer */ - if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) { - /* must apply mask to the clear */ - const GLuint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height; - GLstencil *stencil = ctx->DrawBuffer->Stencil; - const GLstencil mask = ctx->Stencil.WriteMask[0]; - const GLstencil invMask = ~mask; - const GLstencil clearVal = (ctx->Stencil.Clear & mask); - GLuint i; - for (i = 0; i < n; i++) { - stencil[i] = (stencil[i] & invMask) | clearVal; - } - } - else { - /* clear whole buffer without masking */ - const GLuint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height; - GLstencil *stencil = ctx->DrawBuffer->Stencil; - -#if STENCIL_BITS==8 - MEMSET(stencil, ctx->Stencil.Clear, n * sizeof(GLstencil) ); -#else - GLuint i; - for (i = 0; i < n; i++) { - stencil[i] = ctx->Stencil.Clear; - } -#endif - } - } -} + ASSERT(rb->DataType == GL_UNSIGNED_BYTE); + ASSERT(rb->_BaseFormat == GL_STENCIL_INDEX); + /* compute region to clear */ + x = ctx->DrawBuffer->_Xmin; + y = ctx->DrawBuffer->_Ymin; + width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; + height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin; -/** - * Clear the hardware (in graphics card) stencil buffer. - * This is done with the Driver.WriteStencilSpan() and Driver.ReadStencilSpan() - * functions. - * Actually, if there is a hardware stencil buffer it really should have - * been cleared in Driver.Clear()! However, if the hardware does not - * support scissored clears or masked clears (i.e. glStencilMask) then - * we have to use the span-based functions. - */ -static void -clear_hardware_stencil_buffer( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - ASSERT(swrast->Driver.WriteStencilSpan); - ASSERT(swrast->Driver.ReadStencilSpan); - - if (ctx->Scissor.Enabled) { - /* clear scissor region only */ - const GLint x = ctx->DrawBuffer->_Xmin; - const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin; + if (rb->GetPointer(ctx, rb, 0, 0)) { + /* Direct buffer access */ if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) { - /* must apply mask to the clear */ - GLint y; - for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) { - const GLstencil mask = ctx->Stencil.WriteMask[0]; - const GLstencil invMask = ~mask; - const GLstencil clearVal = (ctx->Stencil.Clear & mask); - GLstencil stencil[MAX_WIDTH]; - GLint i; - (*swrast->Driver.ReadStencilSpan)(ctx, width, x, y, stencil); - for (i = 0; i < width; i++) { - stencil[i] = (stencil[i] & invMask) | clearVal; + /* need to mask the clear */ + GLint i, j; + for (i = 0; i < height; i++) { + GLubyte *stencil = rb->GetPointer(ctx, rb, x, y + i); + for (j = 0; j < width; j++) { + stencil[j] = (stencil[j] & invMask) | clearVal; } - (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL); } } else { - /* no masking */ - GLstencil stencil[MAX_WIDTH]; - GLint y, i; - for (i = 0; i < width; i++) { - stencil[i] = ctx->Stencil.Clear; + /* no bit masking */ + if (width == rb->Width && + rb->InternalFormat == GL_STENCIL_INDEX8_EXT) { + /* optimized case */ + GLubyte *stencil = rb->GetPointer(ctx, rb, x, y); + GLuint len = width * height * sizeof(GLubyte); + _mesa_memset(stencil, clearVal, len); } - for (y = ctx->DrawBuffer->_Ymin; y < ctx->DrawBuffer->_Ymax; y++) { - (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL); + else { + /* general case */ + GLint i, j; + for (i = 0; i < height; i++) { + GLubyte *stencil = rb->GetPointer(ctx, rb, x, y + i); + for (j = 0; j < width; j++) { + stencil[j] = clearVal; + } + } } } } else { - /* clear whole stencil buffer */ + /* no direct access */ if (ctx->Stencil.WriteMask[0] != STENCIL_MAX) { - /* must apply mask to the clear */ - const GLstencil mask = ctx->Stencil.WriteMask[0]; - const GLstencil invMask = ~mask; - const GLstencil clearVal = (ctx->Stencil.Clear & mask); - const GLint width = ctx->DrawBuffer->Width; - const GLint height = ctx->DrawBuffer->Height; - const GLint x = ctx->DrawBuffer->_Xmin; - GLint y; - for (y = 0; y < height; y++) { - GLstencil stencil[MAX_WIDTH]; - GLint i; - (*swrast->Driver.ReadStencilSpan)(ctx, width, x, y, stencil); - for (i = 0; i < width; i++) { - stencil[i] = (stencil[i] & invMask) | clearVal; + /* need to mask the clear */ + GLint i, j; + for (i = 0; i < height; i++) { + GLubyte stencil[MAX_WIDTH]; + rb->GetRow(ctx, rb, width, x, y + i, stencil); + for (j = 0; j < width; j++) { + stencil[j] = (stencil[j] & invMask) | clearVal; } - (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL); + rb->PutRow(ctx, rb, width, x, y + i, stencil, NULL); } } else { - /* clear whole buffer without masking */ - const GLint width = ctx->DrawBuffer->Width; - const GLint height = ctx->DrawBuffer->Height; - const GLint x = ctx->DrawBuffer->_Xmin; - GLstencil stencil[MAX_WIDTH]; - GLint y, i; - for (i = 0; i < width; i++) { - stencil[i] = ctx->Stencil.Clear; - } - for (y = 0; y < height; y++) { - (*swrast->Driver.WriteStencilSpan)(ctx, width, x, y, stencil, NULL); - } + /* no bit masking */ + const GLubyte clear8 = clearVal; + GLint i; + for (i = 0; i < height; i++) { + rb->PutMonoRow(ctx, rb, width, x, y + i, &clear8, NULL); + } } } } - - -/** - * Clear the stencil buffer (hardware or software). - */ -void -_swrast_clear_stencil_buffer( GLcontext *ctx ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - if (swrast->Driver.WriteStencilSpan) { - ASSERT(swrast->Driver.ReadStencilSpan); - clear_hardware_stencil_buffer(ctx); - } - else { - clear_software_stencil_buffer(ctx); - } -} -- cgit v1.2.3