From cd03ed4f54444d96e4e47cdb118a3dfd94d92bb0 Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Sun, 5 Nov 2000 18:24:40 +0000 Subject: Reorganized software rasterizer as a module which manages its own state, with tighter interfaces with the rest of the world. Proper documentation to come. --- src/mesa/swrast/s_context.c | 353 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 345 insertions(+), 8 deletions(-) (limited to 'src/mesa/swrast/s_context.c') diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c index 87a2001849..b17b6052db 100644 --- a/src/mesa/swrast/s_context.c +++ b/src/mesa/swrast/s_context.c @@ -1,4 +1,4 @@ -/* $Id: s_context.c,v 1.1 2000/10/31 18:00:04 keithw Exp $ */ +/* $Id: s_context.c,v 1.2 2000/11/05 18:24:40 keithw Exp $ */ /* * Mesa 3-D graphics library @@ -22,28 +22,365 @@ * 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. + * + * Authors: + * Keith Whitwell */ - #include "glheader.h" +#include "types.h" +#include "mem.h" #include "s_pb.h" +#include "s_points.h" +#include "s_lines.h" +#include "s_triangle.h" +#include "s_quads.h" +#include "s_blend.h" +#include "s_context.h" +#include "s_texture.h" -GLboolean -_swrast_create_context( GLcontext *ctx ) + + + +/* + * Recompute the value of swrast->_RasterMask, etc. according to + * the current context. + */ +static void +_swrast_update_rasterflags( GLcontext *ctx ) { - ctx->PB = gl_alloc_pb(); - if (!ctx->PB) return GL_FALSE; + GLuint RasterMask = 0; - return GL_TRUE; + 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 |= SCISSOR_BIT; + if (ctx->Stencil.Enabled) RasterMask |= STENCIL_BIT; + if (ctx->Visual.RGBAflag) { + const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask); + if (colorMask != 0xffffffff) RasterMask |= MASKING_BIT; + if (ctx->Color.ColorLogicOpEnabled) RasterMask |= LOGIC_OP_BIT; + if (ctx->Texture._ReallyEnabled) RasterMask |= TEXTURE_BIT; + } + else { + 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; + + if ( ctx->Viewport.X < 0 + || ctx->Viewport.X + ctx->Viewport.Width > ctx->DrawBuffer->Width + || ctx->Viewport.Y < 0 + || ctx->Viewport.Y + ctx->Viewport.Height > ctx->DrawBuffer->Height) { + RasterMask |= WINCLIP_BIT; + } + + if (ctx->Depth.OcclusionTest) + RasterMask |= OCCLUSION_BIT; + + + /* If we're not drawing to exactly one color buffer set the + * MULTI_DRAW_BIT flag. Also set it if we're drawing to no + * buffers or the RGBA or CI mask disables all writes. + */ + if (ctx->Color.MultiDrawBuffer) { + RasterMask |= MULTI_DRAW_BIT; + } + else if (ctx->Color.DrawBuffer==GL_NONE) { + RasterMask |= MULTI_DRAW_BIT; + } + else if (ctx->Visual.RGBAflag && *((GLuint *) ctx->Color.ColorMask) == 0) { + RasterMask |= MULTI_DRAW_BIT; /* all RGBA channels disabled */ + } + else if (!ctx->Visual.RGBAflag && ctx->Color.IndexMask==0) { + RasterMask |= MULTI_DRAW_BIT; /* all color index bits disabled */ + } + + if ( ctx->Viewport.X<0 + || ctx->Viewport.X + ctx->Viewport.Width > ctx->DrawBuffer->Width + || ctx->Viewport.Y<0 + || ctx->Viewport.Y + ctx->Viewport.Height > ctx->DrawBuffer->Height) { + RasterMask |= WINCLIP_BIT; + } + + SWRAST_CONTEXT(ctx)->_RasterMask = RasterMask; +} + + + +#define _SWRAST_NEW_TRIANGLE (_NEW_RENDERMODE| \ + _NEW_POLYGON| \ + _NEW_DEPTH| \ + _NEW_STENCIL| \ + _NEW_COLOR| \ + _NEW_TEXTURE| \ + _NEW_HINT| \ + _SWRAST_NEW_RASTERMASK| \ + _NEW_LIGHT| \ + _NEW_FOG) + +#define _SWRAST_NEW_LINE (_NEW_RENDERMODE| \ + _NEW_LINE| \ + _NEW_TEXTURE| \ + _NEW_LIGHT| \ + _NEW_FOG| \ + _NEW_DEPTH) + +#define _SWRAST_NEW_POINT (_NEW_RENDERMODE | \ + _NEW_POINT | \ + _NEW_TEXTURE | \ + _NEW_LIGHT | \ + _NEW_FOG) + +#define _SWRAST_NEW_QUAD 0 + +#define _SWRAST_NEW_TEXTURE_SAMPLE_FUNC _NEW_TEXTURE + +#define _SWRAST_NEW_BLEND_FUNC _NEW_COLOR + + + +/* Stub for swrast->Triangle to select a true triangle function + * after a state change. + */ +static void +_swrast_validate_quad( GLcontext *ctx, + SWvertex *v0, SWvertex *v1, SWvertex *v2, SWvertex *v3 ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + _swrast_validate_derived( ctx ); + swrast->choose_quad( ctx ); + + swrast->Quad( ctx, v0, v1, v2, v3 ); +} + +static void +_swrast_validate_triangle( GLcontext *ctx, + SWvertex *v0, SWvertex *v1, SWvertex *v2 ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + _swrast_validate_derived( ctx ); + swrast->choose_triangle( ctx ); + + swrast->Triangle( ctx, v0, v1, v2 ); } +static void +_swrast_validate_line( GLcontext *ctx, SWvertex *v0, SWvertex *v1 ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + _swrast_validate_derived( ctx ); + swrast->choose_line( ctx ); + + swrast->Line( ctx, v0, v1 ); +} + +static void +_swrast_validate_point( GLcontext *ctx, SWvertex *v0 ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + _swrast_validate_derived( ctx ); + swrast->choose_point( ctx ); + + swrast->Point( ctx, v0 ); +} + +void +_swrast_validate_blend_func( GLcontext *ctx, GLuint n, + const GLubyte mask[], + GLchan src[][4], + CONST GLchan dst[][4] ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + _swrast_validate_derived( ctx ); + _swrast_choose_blend_func( ctx ); + + swrast->BlendFunc( ctx, n, mask, src, dst ); +} + + +void +_swrast_validate_texture_sample( GLcontext *ctx, GLuint texUnit, + const struct gl_texture_object *tObj, + GLuint n, + const GLfloat s[], const GLfloat t[], + const GLfloat u[], const GLfloat lambda[], + GLchan rgba[][4] ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + _swrast_validate_derived( ctx ); + _swrast_choose_texture_sample_func( ctx, texUnit, tObj ); + + swrast->TextureSample[texUnit]( ctx, texUnit, tObj, n, s, t, u, + lambda, rgba ); +} + + +static void +_swrast_sleep( GLcontext *ctx, GLuint new_state ) +{ +} + + +static void +_swrast_invalidate_state( GLcontext *ctx, GLuint new_state ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + GLuint i; + + swrast->NewState |= new_state; + + /* After 10 statechanges without any swrast functions being called, + * put the module to sleep. + */ + if (++swrast->StateChanges > 10) { + swrast->InvalidateState = _swrast_sleep; + swrast->NewState = ~0; + new_state = ~0; + } + + if (new_state & swrast->invalidate_triangle) + swrast->Triangle = _swrast_validate_triangle; + + if (new_state & swrast->invalidate_line) + swrast->Line = _swrast_validate_line; + + if (new_state & swrast->invalidate_point) + swrast->Point = _swrast_validate_point; + + if (new_state & swrast->invalidate_quad) + swrast->Quad = _swrast_validate_quad; + + if (new_state & _SWRAST_NEW_BLEND_FUNC) + swrast->BlendFunc = _swrast_validate_blend_func; + + if (new_state & _SWRAST_NEW_TEXTURE_SAMPLE_FUNC) + for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++) + swrast->TextureSample[i] = _swrast_validate_texture_sample; +} + + + void -_swrast_destroy_context( GLcontext *ctx ) +_swrast_validate_derived( GLcontext *ctx ) { + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + if (swrast->NewState) + { + if (swrast->NewState & _SWRAST_NEW_RASTERMASK) + _swrast_update_rasterflags( ctx ); + + swrast->NewState = 0; + swrast->StateChanges = 0; + swrast->InvalidateState = _swrast_invalidate_state; + } } +/* Public entrypoints: See also s_accum.c, s_bitmap.c, etc. + */ +void +_swrast_Quad( GLcontext *ctx, + SWvertex *v0, SWvertex *v1, SWvertex *v2, SWvertex *v3 ) +{ + SWRAST_CONTEXT(ctx)->Quad( ctx, v0, v1, v2, v3 ); +} + +void +_swrast_Triangle( GLcontext *ctx, SWvertex *v0, SWvertex *v1, SWvertex *v2 ) +{ + SWRAST_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2 ); +} + +void +_swrast_Line( GLcontext *ctx, SWvertex *v0, SWvertex *v1 ) +{ + SWRAST_CONTEXT(ctx)->Line( ctx, v0, v1 ); +} + +void +_swrast_Point( GLcontext *ctx, SWvertex *v0 ) +{ + SWRAST_CONTEXT(ctx)->Point( ctx, v0 ); +} + +void +_swrast_InvalidateState( GLcontext *ctx, GLuint new_state ) +{ + SWRAST_CONTEXT(ctx)->InvalidateState( ctx, new_state ); +} + + +GLuint * +_swrast_get_stipple_counter_ref( GLcontext *ctx ) +{ + return &SWRAST_CONTEXT(ctx)->StippleCounter; +} + + +GLboolean +_swrast_CreateContext( GLcontext *ctx ) +{ + GLuint i; + SWcontext *swrast = (SWcontext *)CALLOC(sizeof(SWcontext)); + if (!swrast) + return GL_FALSE; + + swrast->PB = gl_alloc_pb(); + if (!swrast->PB) { + FREE(swrast); + return GL_FALSE; + } + + swrast->NewState = ~0; + + swrast->choose_point = _swrast_choose_point; + swrast->choose_line = _swrast_choose_line; + swrast->choose_triangle = _swrast_choose_triangle; + swrast->choose_quad = _swrast_choose_quad; + + swrast->invalidate_point = _SWRAST_NEW_POINT; + swrast->invalidate_line = _SWRAST_NEW_LINE; + swrast->invalidate_triangle = _SWRAST_NEW_TRIANGLE; + swrast->invalidate_quad = _SWRAST_NEW_QUAD; + + swrast->Point = _swrast_validate_point; + swrast->Line = _swrast_validate_line; + swrast->Triangle = _swrast_validate_triangle; + swrast->Quad = _swrast_validate_quad; + swrast->InvalidateState = _swrast_sleep; + swrast->BlendFunc = _swrast_validate_blend_func; + + for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++) + swrast->TextureSample[i] = _swrast_validate_texture_sample; + + ctx->swrast_context = swrast; + return GL_TRUE; +} + +void +_swrast_DestroyContext( GLcontext *ctx ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + FREE( swrast->PB ); + FREE( swrast ); + + ctx->swrast_context = 0; +} -- cgit v1.2.3