From 724abeb058ca9372c5a9b9e38ee43dde1accaa41 Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Tue, 31 Oct 2000 18:09:44 +0000 Subject: Moved the software rasterizer to a new directory. --- src/mesa/main/blend.c | 634 +------------------------------------------------- 1 file changed, 1 insertion(+), 633 deletions(-) (limited to 'src/mesa/main/blend.c') diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c index 4f20d269ac..91267cda7f 100644 --- a/src/mesa/main/blend.c +++ b/src/mesa/main/blend.c @@ -1,4 +1,4 @@ -/* $Id: blend.c,v 1.23 2000/10/30 16:32:43 brianp Exp $ */ +/* $Id: blend.c,v 1.24 2000/10/31 18:09:44 keithw Exp $ */ /* * Mesa 3-D graphics library @@ -30,13 +30,10 @@ #include "all.h" #else #include "glheader.h" -#include "alphabuf.h" #include "blend.h" #include "context.h" #include "enums.h" #include "macros.h" -#include "pb.h" -#include "span.h" #include "types.h" #endif @@ -322,632 +319,3 @@ _mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) ctx->NewState |= _NEW_COLOR; } -#ifdef USE_MMX_ASM -#define _BLENDAPI _ASMAPI -#else -#define _BLENDAPI -#endif - -/* - * Common transparency blending mode. - */ -static void _BLENDAPI -blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) -{ - GLuint i; - ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT); - ASSERT(ctx->Color.BlendSrcRGB==GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstRGB==GL_ONE_MINUS_SRC_ALPHA); - (void) ctx; - - for (i=0;i> 8; - const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s + 1) >> 8; - const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s + 1) >> 8; - const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s + 1) >> 8; -#elif 0 - /* This is slower but satisfies Glean */ - const GLint s = CHAN_MAX - t; - const GLint r = (rgba[i][RCOMP] * t + dest[i][RCOMP] * s) / 255; - const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s) / 255; - const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s) / 255; - const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s) / 255; -#else -#if CHAN_BITS == 8 - /* This satisfies Glean and should be reasonably fast */ - /* Contributed by Nathan Hand */ -#define DIV255(X) (((X) << 8) + (X) + 256) >> 16 - const GLint s = CHAN_MAX - t; - const GLint r = DIV255(rgba[i][RCOMP] * t + dest[i][RCOMP] * s); - const GLint g = DIV255(rgba[i][GCOMP] * t + dest[i][GCOMP] * s); - const GLint b = DIV255(rgba[i][BCOMP] * t + dest[i][BCOMP] * s); - const GLint a = DIV255(rgba[i][ACOMP] * t + dest[i][ACOMP] * s); -#undef DIV255 -#else - const GLint s = CHAN_MAX - t; - const GLint r = (rgba[i][RCOMP] * t + dest[i][RCOMP] * s) / CHAN_MAX; - const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s) / CHAN_MAX; - const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s) / CHAN_MAX; - const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s) / CHAN_MAX; -#endif -#endif - ASSERT(r <= CHAN_MAX); - ASSERT(g <= CHAN_MAX); - ASSERT(b <= CHAN_MAX); - ASSERT(a <= CHAN_MAX); - rgba[i][RCOMP] = (GLchan) r; - rgba[i][GCOMP] = (GLchan) g; - rgba[i][BCOMP] = (GLchan) b; - rgba[i][ACOMP] = (GLchan) a; - } - } - } -} - - - -/* - * Add src and dest. - */ -static void _BLENDAPI -blend_add( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) -{ - GLuint i; - ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT); - ASSERT(ctx->Color.BlendSrcRGB==GL_ONE); - ASSERT(ctx->Color.BlendDstRGB==GL_ONE); - (void) ctx; - - for (i=0;iColor.BlendEquation==GL_MIN_EXT); - (void) ctx; - - for (i=0;iColor.BlendEquation==GL_MAX_EXT); - (void) ctx; - - for (i=0;i> 8; - GLint g = (rgba[i][GCOMP] * dest[i][GCOMP]) >> 8; - GLint b = (rgba[i][BCOMP] * dest[i][BCOMP]) >> 8; - GLint a = (rgba[i][ACOMP] * dest[i][ACOMP]) >> 8; - rgba[i][RCOMP] = (GLchan) r; - rgba[i][GCOMP] = (GLchan) g; - rgba[i][BCOMP] = (GLchan) b; - rgba[i][ACOMP] = (GLchan) a; - } - } -} - - - -/* - * General case blend pixels. - * Input: n - number of pixels - * mask - the usual write mask - * In/Out: rgba - the incoming and modified pixels - * Input: dest - the pixels from the dest color buffer - */ -static void _BLENDAPI -blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) -{ - GLfloat rscale = 1.0F / CHAN_MAXF; - GLfloat gscale = 1.0F / CHAN_MAXF; - GLfloat bscale = 1.0F / CHAN_MAXF; - GLfloat ascale = 1.0F / CHAN_MAXF; - GLuint i; - - for (i=0;iColor.BlendSrcRGB) { - case GL_ZERO: - sR = sG = sB = 0.0F; - break; - case GL_ONE: - sR = sG = sB = 1.0F; - break; - case GL_DST_COLOR: - sR = (GLfloat) Rd * rscale; - sG = (GLfloat) Gd * gscale; - sB = (GLfloat) Bd * bscale; - break; - case GL_ONE_MINUS_DST_COLOR: - sR = 1.0F - (GLfloat) Rd * rscale; - sG = 1.0F - (GLfloat) Gd * gscale; - sB = 1.0F - (GLfloat) Bd * bscale; - break; - case GL_SRC_ALPHA: - sR = sG = sB = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - sR = sG = sB = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - sR = sG = sB = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - sR = sG = sB = 1.0F - (GLfloat) Ad * ascale; - break; - case GL_SRC_ALPHA_SATURATE: - if (As < CHAN_MAX - Ad) { - sR = sG = sB = (GLfloat) As * ascale; - } - else { - sR = sG = sB = 1.0F - (GLfloat) Ad * ascale; - } - break; - case GL_CONSTANT_COLOR: - sR = ctx->Color.BlendColor[0]; - sG = ctx->Color.BlendColor[1]; - sB = ctx->Color.BlendColor[2]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - sR = 1.0F - ctx->Color.BlendColor[0]; - sG = 1.0F - ctx->Color.BlendColor[1]; - sB = 1.0F - ctx->Color.BlendColor[2]; - break; - case GL_CONSTANT_ALPHA: - sR = sG = sB = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - sR = sG = sB = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_SRC_COLOR: /* GL_NV_blend_square */ - sR = (GLfloat) Rs * rscale; - sG = (GLfloat) Gs * gscale; - sB = (GLfloat) Bs * bscale; - break; - case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */ - sR = 1.0F - (GLfloat) Rs * rscale; - sG = 1.0F - (GLfloat) Gs * gscale; - sB = 1.0F - (GLfloat) Bs * bscale; - break; - default: - /* this should never happen */ - gl_problem(ctx, "Bad blend source RGB factor in do_blend"); - return; - } - - /* Source Alpha factor */ - switch (ctx->Color.BlendSrcA) { - case GL_ZERO: - sA = 0.0F; - break; - case GL_ONE: - sA = 1.0F; - break; - case GL_DST_COLOR: - sA = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_COLOR: - sA = 1.0F - (GLfloat) Ad * ascale; - break; - case GL_SRC_ALPHA: - sA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - sA = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - sA =(GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - sA = 1.0F - (GLfloat) Ad * ascale; - break; - case GL_SRC_ALPHA_SATURATE: - sA = 1.0; - break; - case GL_CONSTANT_COLOR: - sA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - sA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_CONSTANT_ALPHA: - sA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - sA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_SRC_COLOR: /* GL_NV_blend_square */ - sA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */ - sA = 1.0F - (GLfloat) As * ascale; - break; - default: - /* this should never happen */ - sA = 0.0F; - gl_problem(ctx, "Bad blend source A factor in do_blend"); - } - - /* Dest RGB factor */ - switch (ctx->Color.BlendDstRGB) { - case GL_ZERO: - dR = dG = dB = 0.0F; - break; - case GL_ONE: - dR = dG = dB = 1.0F; - break; - case GL_SRC_COLOR: - dR = (GLfloat) Rs * rscale; - dG = (GLfloat) Gs * gscale; - dB = (GLfloat) Bs * bscale; - break; - case GL_ONE_MINUS_SRC_COLOR: - dR = 1.0F - (GLfloat) Rs * rscale; - dG = 1.0F - (GLfloat) Gs * gscale; - dB = 1.0F - (GLfloat) Bs * bscale; - break; - case GL_SRC_ALPHA: - dR = dG = dB = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - dR = dG = dB = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - dR = dG = dB = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - dR = dG = dB = 1.0F - (GLfloat) Ad * ascale; - break; - case GL_CONSTANT_COLOR: - dR = ctx->Color.BlendColor[0]; - dG = ctx->Color.BlendColor[1]; - dB = ctx->Color.BlendColor[2]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - dR = 1.0F - ctx->Color.BlendColor[0]; - dG = 1.0F - ctx->Color.BlendColor[1]; - dB = 1.0F - ctx->Color.BlendColor[2]; - break; - case GL_CONSTANT_ALPHA: - dR = dG = dB = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - dR = dG = dB = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_DST_COLOR: /* GL_NV_blend_square */ - dR = (GLfloat) Rd * rscale; - dG = (GLfloat) Gd * gscale; - dB = (GLfloat) Bd * bscale; - break; - case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */ - dR = 1.0F - (GLfloat) Rd * rscale; - dG = 1.0F - (GLfloat) Gd * gscale; - dB = 1.0F - (GLfloat) Bd * bscale; - break; - default: - /* this should never happen */ - dR = dG = dB = 0.0F; - gl_problem(ctx, "Bad blend dest RGB factor in do_blend"); - } - - /* Dest Alpha factor */ - switch (ctx->Color.BlendDstA) { - case GL_ZERO: - dA = 0.0F; - break; - case GL_ONE: - dA = 1.0F; - break; - case GL_SRC_COLOR: - dA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_COLOR: - dA = 1.0F - (GLfloat) As * ascale; - break; - case GL_SRC_ALPHA: - dA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - dA = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - dA = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - dA = 1.0F - (GLfloat) Ad * ascale; - break; - case GL_CONSTANT_COLOR: - dA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_COLOR: - dA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_CONSTANT_ALPHA: - dA = ctx->Color.BlendColor[3]; - break; - case GL_ONE_MINUS_CONSTANT_ALPHA: - dA = 1.0F - ctx->Color.BlendColor[3]; - break; - case GL_DST_COLOR: /* GL_NV_blend_square */ - dA = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */ - dA = 1.0F - (GLfloat) Ad * ascale; - break; - default: - /* this should never happen */ - dA = 0.0F; - gl_problem(ctx, "Bad blend dest A factor in do_blend"); - return; - } - - /* Due to round-off problems we have to clamp against zero. */ - /* Optimization: we don't have to do this for all src & dst factors */ - if (dA < 0.0F) dA = 0.0F; - if (dR < 0.0F) dR = 0.0F; - if (dG < 0.0F) dG = 0.0F; - if (dB < 0.0F) dB = 0.0F; - if (sA < 0.0F) sA = 0.0F; - if (sR < 0.0F) sR = 0.0F; - if (sG < 0.0F) sG = 0.0F; - if (sB < 0.0F) sB = 0.0F; - - ASSERT( sR <= 1.0 ); - ASSERT( sG <= 1.0 ); - ASSERT( sB <= 1.0 ); - ASSERT( sA <= 1.0 ); - ASSERT( dR <= 1.0 ); - ASSERT( dG <= 1.0 ); - ASSERT( dB <= 1.0 ); - ASSERT( dA <= 1.0 ); - - /* compute blended color */ - if (ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) { - r = Rs * sR + Rd * dR + 0.5F; - g = Gs * sG + Gd * dG + 0.5F; - b = Bs * sB + Bd * dB + 0.5F; - a = As * sA + Ad * dA + 0.5F; - } - else if (ctx->Color.BlendEquation==GL_FUNC_SUBTRACT_EXT) { - r = Rs * sR - Rd * dR + 0.5F; - g = Gs * sG - Gd * dG + 0.5F; - b = Bs * sB - Bd * dB + 0.5F; - a = As * sA - Ad * dA + 0.5F; - } - else if (ctx->Color.BlendEquation==GL_FUNC_REVERSE_SUBTRACT_EXT) { - r = Rd * dR - Rs * sR + 0.5F; - g = Gd * dG - Gs * sG + 0.5F; - b = Bd * dB - Bs * sB + 0.5F; - a = Ad * dA - As * sA + 0.5F; - } - else { - /* should never get here */ - r = g = b = a = 0.0F; /* silence uninitialized var warning */ - gl_problem(ctx, "unexpected BlendEquation in blend_general()"); - } - - /* final clamping */ - rgba[i][RCOMP] = (GLchan) (GLint) CLAMP( r, 0.0F, CHAN_MAXF ); - rgba[i][GCOMP] = (GLchan) (GLint) CLAMP( g, 0.0F, CHAN_MAXF ); - rgba[i][BCOMP] = (GLchan) (GLint) CLAMP( b, 0.0F, CHAN_MAXF ); - rgba[i][ACOMP] = (GLchan) (GLint) CLAMP( a, 0.0F, CHAN_MAXF ); - } - } -} - - - -#if defined(USE_MMX_ASM) -#include "X86/mmx.h" -#include "X86/common_x86_asm.h" -#endif - - -/* - * Analyze current blending parameters to pick fastest blending function. - * Result: the ctx->Color.BlendFunc pointer is updated. - */ -static void set_blend_function( GLcontext *ctx ) -{ - const GLenum eq = ctx->Color.BlendEquation; - const GLenum srcRGB = ctx->Color.BlendSrcRGB; - const GLenum dstRGB = ctx->Color.BlendDstRGB; - const GLenum srcA = ctx->Color.BlendSrcA; - const GLenum dstA = ctx->Color.BlendDstA; - -#if defined(USE_MMX_ASM) - /* Hmm. A table here would have 12^4 == way too many entries. - * Provide a hook for MMX instead. - */ - if ( cpu_has_mmx ) { - gl_mmx_set_blend_function( ctx ); - } - else -#endif - if (srcRGB != srcA || dstRGB != dstA) { - ctx->Color.BlendFunc = blend_general; - } - else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_SRC_ALPHA - && dstRGB==GL_ONE_MINUS_SRC_ALPHA) { - ctx->Color.BlendFunc = blend_transparency; - } - else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_ONE && dstRGB==GL_ONE) { - ctx->Color.BlendFunc = blend_add; - } - else if (((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_REVERSE_SUBTRACT_EXT) - && (srcRGB==GL_ZERO && dstRGB==GL_SRC_COLOR)) - || - ((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_SUBTRACT_EXT) - && (srcRGB==GL_DST_COLOR && dstRGB==GL_ZERO))) { - ctx->Color.BlendFunc = blend_modulate; - } - else if (eq==GL_MIN_EXT) { - ctx->Color.BlendFunc = blend_min; - } - else if (eq==GL_MAX_EXT) { - ctx->Color.BlendFunc = blend_max; - } - else { - ctx->Color.BlendFunc = blend_general; - } -} - - - -/* - * Apply the blending operator to a span of pixels. - * Input: n - number of pixels in span - * x, y - location of leftmost pixel in span in window coords. - * mask - boolean mask indicating which pixels to blend. - * In/Out: rgba - pixel values - */ -void -_mesa_blend_span( GLcontext *ctx, GLuint n, GLint x, GLint y, - GLchan rgba[][4], const GLubyte mask[] ) -{ - GLchan dest[MAX_WIDTH][4]; - - /* Check if device driver can do the work */ - if (ctx->Color.BlendEquation==GL_LOGIC_OP && - !ctx->Color.ColorLogicOpEnabled) { - return; - } - - /* Read span of current frame buffer pixels */ - gl_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest ); - - if (!ctx->Color.BlendFunc) - set_blend_function(ctx); - - (*ctx->Color.BlendFunc)( ctx, n, mask, rgba, (const GLchan (*)[4])dest ); -} - - - -/* - * Apply the blending operator to an array of pixels. - * Input: n - number of pixels in span - * x, y - array of pixel locations - * mask - boolean mask indicating which pixels to blend. - * In/Out: rgba - pixel values - */ -void -_mesa_blend_pixels( GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - GLchan rgba[][4], const GLubyte mask[] ) -{ - GLchan dest[PB_SIZE][4]; - - /* Check if device driver can do the work */ - if (ctx->Color.BlendEquation==GL_LOGIC_OP && - !ctx->Color.ColorLogicOpEnabled) { - return; - } - - /* Read pixels from current color buffer */ - (*ctx->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask ); - if (ctx->RasterMask & ALPHABUF_BIT) { - _mesa_read_alpha_pixels( ctx, n, x, y, dest, mask ); - } - - if (!ctx->Color.BlendFunc) - set_blend_function(ctx); - - (*ctx->Color.BlendFunc)( ctx, n, mask, rgba, (const GLchan (*)[4])dest ); -} -- cgit v1.2.3