From de67b3ea18c68f69e0303f1ba88dbb26066049de Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Thu, 24 Jun 2004 16:32:27 +0000 Subject: fix capitalization, new comments, etc --- src/mesa/swrast/s_context.c | 82 +++++++++++++++++++++++++++++++-------------- 1 file changed, 56 insertions(+), 26 deletions(-) (limited to 'src/mesa/swrast') diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c index 06f0d88abd..32475cf539 100644 --- a/src/mesa/swrast/s_context.c +++ b/src/mesa/swrast/s_context.c @@ -45,46 +45,48 @@ #include "s_texture.h" -/* +/** * Recompute the value of swrast->_RasterMask, etc. according to - * the current context. + * the current context. The _RasterMask field can be easily tested by + * drivers to determine certain basic GL state (does the primitive need + * stenciling, logic-op, fog, etc?). */ static void _swrast_update_rasterflags( GLcontext *ctx ) { - GLuint RasterMask = 0; - - if (ctx->Color.AlphaEnabled) RasterMask |= ALPHATEST_BIT; - if (ctx->Color.BlendEnabled) RasterMask |= BLEND_BIT; - if (ctx->Depth.Test) RasterMask |= DEPTH_BIT; - if (ctx->Fog.Enabled) RasterMask |= FOG_BIT; - if (ctx->Scissor.Enabled) RasterMask |= CLIP_BIT; - if (ctx->Stencil.Enabled) RasterMask |= STENCIL_BIT; + GLuint rasterMask = 0; + + if (ctx->Color.AlphaEnabled) rasterMask |= ALPHATEST_BIT; + if (ctx->Color.BlendEnabled) rasterMask |= BLEND_BIT; + if (ctx->Depth.Test) rasterMask |= DEPTH_BIT; + if (ctx->Fog.Enabled) rasterMask |= FOG_BIT; + if (ctx->Scissor.Enabled) rasterMask |= CLIP_BIT; + if (ctx->Stencil.Enabled) rasterMask |= STENCIL_BIT; if (ctx->Visual.rgbMode) { const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask); - if (colorMask != 0xffffffff) RasterMask |= MASKING_BIT; - if (ctx->Color._LogicOpEnabled) RasterMask |= LOGIC_OP_BIT; - if (ctx->Texture._EnabledUnits) RasterMask |= TEXTURE_BIT; + if (colorMask != 0xffffffff) rasterMask |= MASKING_BIT; + if (ctx->Color._LogicOpEnabled) rasterMask |= LOGIC_OP_BIT; + if (ctx->Texture._EnabledUnits) rasterMask |= TEXTURE_BIT; } else { - if (ctx->Color.IndexMask != 0xffffffff) RasterMask |= MASKING_BIT; - if (ctx->Color.IndexLogicOpEnabled) RasterMask |= LOGIC_OP_BIT; + if (ctx->Color.IndexMask != 0xffffffff) rasterMask |= MASKING_BIT; + if (ctx->Color.IndexLogicOpEnabled) rasterMask |= LOGIC_OP_BIT; } if (ctx->DrawBuffer->UseSoftwareAlphaBuffers && ctx->Color.ColorMask[ACOMP] && ctx->Color.DrawBuffer != GL_NONE) - RasterMask |= ALPHABUF_BIT; + rasterMask |= ALPHABUF_BIT; if ( ctx->Viewport.X < 0 || ctx->Viewport.X + ctx->Viewport.Width > (GLint) ctx->DrawBuffer->Width || ctx->Viewport.Y < 0 || ctx->Viewport.Y + ctx->Viewport.Height > (GLint) ctx->DrawBuffer->Height) { - RasterMask |= CLIP_BIT; + rasterMask |= CLIP_BIT; } if (ctx->Depth.OcclusionTest || ctx->Occlusion.Active) - RasterMask |= OCCLUSION_BIT; + rasterMask |= OCCLUSION_BIT; /* If we're not drawing to exactly one color buffer set the @@ -93,23 +95,29 @@ _swrast_update_rasterflags( GLcontext *ctx ) */ if (_mesa_bitcount(ctx->Color._DrawDestMask) != 1) { /* more than one color buffer designated for writing (or zero buffers) */ - RasterMask |= MULTI_DRAW_BIT; + rasterMask |= MULTI_DRAW_BIT; } else if (ctx->Visual.rgbMode && *((GLuint *) ctx->Color.ColorMask) == 0) { - RasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */ + rasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */ } else if (!ctx->Visual.rgbMode && ctx->Color.IndexMask==0) { - RasterMask |= MULTI_DRAW_BIT; /* all color index bits disabled */ + rasterMask |= MULTI_DRAW_BIT; /* all color index bits disabled */ } if (ctx->FragmentProgram._Enabled) { - RasterMask |= FRAGPROG_BIT; + rasterMask |= FRAGPROG_BIT; } - SWRAST_CONTEXT(ctx)->_RasterMask = RasterMask; + SWRAST_CONTEXT(ctx)->_RasterMask = rasterMask; } +/** + * Examine polycon culls tate to compute the _BackfaceSign field. + * _BackfaceSign will be 0 if no culling, -1 if culling back-faces, + * and 1 if culling front-faces. The Polygon FrontFace state also + * factors in. + */ static void _swrast_update_polygon( GLcontext *ctx ) { @@ -140,6 +148,10 @@ _swrast_update_polygon( GLcontext *ctx ) } +/** + * Update the _PreferPixelFog field to indicate if we need to compute + * fog factors per-fragment. + */ static void _swrast_update_fog_hint( GLcontext *ctx ) { @@ -152,7 +164,7 @@ _swrast_update_fog_hint( GLcontext *ctx ) -/* +/** * Update the swrast->_AnyTextureCombine flag. */ static void @@ -171,7 +183,7 @@ _swrast_update_texture_env( GLcontext *ctx ) } -/* +/** * Update swrast->_FogColor and swrast->_FogEnable values. */ static void @@ -200,6 +212,10 @@ _swrast_update_fog_state( GLcontext *ctx ) } +/** + * Update state for running fragment programs. Basically, load the + * program parameters with current state values. + */ static void _swrast_update_fragment_program( GLcontext *ctx ) { @@ -255,7 +271,8 @@ _swrast_update_fragment_program( GLcontext *ctx ) -/* Stub for swrast->Triangle to select a true triangle function +/** + * Stub for swrast->Triangle to select a true triangle function * after a state change. */ static void @@ -280,6 +297,10 @@ _swrast_validate_triangle( GLcontext *ctx, swrast->Triangle( ctx, v0, v1, v2 ); } +/** + * Called via swrast->Line. Examine current GL state and choose a software + * line routine. Then call it. + */ static void _swrast_validate_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 ) { @@ -299,6 +320,10 @@ _swrast_validate_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 ) swrast->Line( ctx, v0, v1 ); } +/** + * Called via swrast->Point. Examine current GL state and choose a software + * point routine. Then call it. + */ static void _swrast_validate_point( GLcontext *ctx, const SWvertex *v0 ) { @@ -318,6 +343,10 @@ _swrast_validate_point( GLcontext *ctx, const SWvertex *v0 ) } +/** + * Called via swrast->BlendFunc. Examine GL state to choose a blending + * function, then call it. + */ static void _ASMAPI _swrast_validate_blend_func( GLcontext *ctx, GLuint n, const GLubyte mask[], @@ -410,6 +439,7 @@ _swrast_invalidate_state( GLcontext *ctx, GLuint new_state ) for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++) swrast->TextureSample[i] = _swrast_validate_texture_sample; + /* Debug checks */ if (ctx->Visual.rgbMode) { ASSERT(swrast->Driver.WriteRGBASpan); ASSERT(swrast->Driver.WriteRGBSpan); -- cgit v1.2.3