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Diffstat (limited to 'src/mesa/swrast/s_span.c')
-rw-r--r--src/mesa/swrast/s_span.c172
1 files changed, 113 insertions, 59 deletions
diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c
index c0c47f82b18..e161ff473fd 100644
--- a/src/mesa/swrast/s_span.c
+++ b/src/mesa/swrast/s_span.c
@@ -1,4 +1,4 @@
-/* $Id: s_span.c,v 1.13 2001/05/03 22:13:32 brianp Exp $ */
+/* $Id: s_span.c,v 1.14 2001/05/15 21:30:27 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -51,12 +51,12 @@
-
/*
* Apply the current polygon stipple pattern to a span of pixels.
*/
-static void stipple_polygon_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, GLubyte mask[] )
+static void
+stipple_polygon_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ GLubyte mask[] )
{
const GLuint highbit = 0x80000000;
GLuint i, m, stipple;
@@ -83,8 +83,8 @@ static void stipple_polygon_span( GLcontext *ctx,
* as a special case:
* 0 = all pixels clipped
*/
-static GLuint clip_span( GLcontext *ctx,
- GLint n, GLint x, GLint y, GLubyte mask[] )
+static GLuint
+clip_span( GLcontext *ctx, GLint n, GLint x, GLint y, GLubyte mask[] )
{
/* Clip to top and bottom */
if (y < 0 || y >= ctx->DrawBuffer->Height) {
@@ -123,9 +123,9 @@ static GLuint clip_span( GLcontext *ctx,
/*
* Draw to more than one color buffer (or none).
*/
-static void multi_write_index_span( GLcontext *ctx, GLuint n,
- GLint x, GLint y, const GLuint indexes[],
- const GLubyte mask[] )
+static void
+multi_write_index_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLuint indexes[], const GLubyte mask[] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLuint bufferBit;
@@ -178,10 +178,11 @@ static void multi_write_index_span( GLcontext *ctx, GLuint n,
* index - array of [n] color indexes
* primitive - either GL_POINT, GL_LINE, GL_POLYGON, or GL_BITMAP
*/
-void _mesa_write_index_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat fog[],
- GLuint indexIn[], GLenum primitive )
+void
+_mesa_write_index_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLdepth z[], const GLfloat fog[],
+ GLuint indexIn[], const GLint coverage[],
+ GLenum primitive )
{
const GLuint modBits = FOG_BIT | BLEND_BIT | MASKING_BIT | LOGIC_OP_BIT;
GLubyte mask[MAX_WIDTH];
@@ -244,6 +245,15 @@ void _mesa_write_index_span( GLcontext *ctx,
_mesa_depth_fog_ci_pixels( ctx, n, z, index );
}
+ /* Antialias coverage application */
+ if (coverage) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ ASSERT(coverage[i] < 16);
+ index[i] = (index[i] & ~0xf) | coverage[i];
+ }
+ }
+
if (swrast->_RasterMask & MULTI_DRAW_BIT) {
/* draw to zero or two or more buffers */
multi_write_index_span( ctx, n, x, y, index, mask );
@@ -269,11 +279,11 @@ void _mesa_write_index_span( GLcontext *ctx,
-void _mesa_write_monoindex_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
- const GLdepth z[],
- const GLfloat fog[],
- GLuint index, GLenum primitive )
+void
+_mesa_write_monoindex_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLdepth z[], const GLfloat fog[],
+ GLuint index, const GLint coverage[],
+ GLenum primitive )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
GLubyte mask[MAX_WIDTH];
@@ -322,7 +332,8 @@ void _mesa_write_monoindex_span( GLcontext *ctx,
if (ctx->Fog.Enabled
|| ctx->Color.IndexLogicOpEnabled
- || ctx->Color.IndexMask != 0xffffffff) {
+ || ctx->Color.IndexMask != 0xffffffff
+ || coverage) {
/* different index per pixel */
GLuint indexes[MAX_WIDTH];
for (i = 0; i < n; i++) {
@@ -336,6 +347,15 @@ void _mesa_write_monoindex_span( GLcontext *ctx,
_mesa_depth_fog_ci_pixels( ctx, n, z, indexes );
}
+ /* Antialias coverage application */
+ if (coverage) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ ASSERT(coverage[i] < 16);
+ indexes[i] = (indexes[i] & ~0xf) | coverage[i];
+ }
+ }
+
if (swrast->_RasterMask & MULTI_DRAW_BIT) {
/* draw to zero or two or more buffers */
multi_write_index_span( ctx, n, x, y, indexes, mask );
@@ -377,9 +397,9 @@ void _mesa_write_monoindex_span( GLcontext *ctx,
/*
* Draw to more than one RGBA color buffer (or none).
*/
-static void multi_write_rgba_span( GLcontext *ctx, GLuint n,
- GLint x, GLint y, CONST GLchan rgba[][4],
- const GLubyte mask[] )
+static void
+multi_write_rgba_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ CONST GLchan rgba[][4], const GLubyte mask[] )
{
const GLuint colorMask = *((GLuint *) ctx->Color.ColorMask);
GLuint bufferBit;
@@ -442,11 +462,11 @@ static void multi_write_rgba_span( GLcontext *ctx, GLuint n,
-void _mesa_write_rgba_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat *fog,
- GLchan rgbaIn[][4],
- GLenum primitive )
+void
+_mesa_write_rgba_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLdepth z[], const GLfloat fog[],
+ GLchan rgbaIn[][4], const GLfloat coverage[],
+ GLenum primitive )
{
const GLuint modBits = FOG_BIT | BLEND_BIT | MASKING_BIT |
LOGIC_OP_BIT | TEXTURE_BIT;
@@ -530,6 +550,14 @@ void _mesa_write_rgba_span( GLcontext *ctx,
_mesa_depth_fog_rgba_pixels( ctx, n, z, rgba );
}
+ /* Antialias coverage application */
+ if (coverage) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (GLchan) (rgba[i][ACOMP] * coverage[i]);
+ }
+ }
+
if (swrast->_RasterMask & MULTI_DRAW_BIT) {
multi_write_rgba_span( ctx, n, x, y, (const GLchan (*)[4]) rgba, mask );
}
@@ -578,11 +606,11 @@ void _mesa_write_rgba_span( GLcontext *ctx,
* r, g, b, a - the color of the pixels
* primitive - either GL_POINT, GL_LINE, GL_POLYGON or GL_BITMAP.
*/
-void _mesa_write_monocolor_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat fog[],
- const GLchan color[4],
- GLenum primitive )
+void
+_mesa_write_monocolor_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLdepth z[], const GLfloat fog[],
+ const GLchan color[4], const GLfloat coverage[],
+ GLenum primitive )
{
const GLuint colorMask = *((GLuint *) ctx->Color.ColorMask);
GLuint i;
@@ -656,7 +684,7 @@ void _mesa_write_monocolor_span( GLcontext *ctx,
}
if (ctx->Color.ColorLogicOpEnabled || colorMask != 0xffffffff ||
- (swrast->_RasterMask & (BLEND_BIT | FOG_BIT))) {
+ (swrast->_RasterMask & (BLEND_BIT | FOG_BIT)) || coverage) {
/* assign same color to each pixel */
for (i = 0; i < n; i++) {
if (mask[i]) {
@@ -672,6 +700,14 @@ void _mesa_write_monocolor_span( GLcontext *ctx,
_mesa_depth_fog_rgba_pixels( ctx, n, z, rgba );
}
+ /* Antialias coverage application */
+ if (coverage) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (GLchan) (rgba[i][ACOMP] * coverage[i]);
+ }
+ }
+
if (swrast->_RasterMask & MULTI_DRAW_BIT) {
multi_write_rgba_span( ctx, n, x, y,
(const GLchan (*)[4]) rgba, mask );
@@ -734,7 +770,8 @@ void _mesa_write_monocolor_span( GLcontext *ctx,
* Add specular color to base color. This is used only when
* GL_LIGHT_MODEL_COLOR_CONTROL = GL_SEPARATE_SPECULAR_COLOR.
*/
-static void add_colors(GLuint n, GLchan rgba[][4], CONST GLchan specular[][4] )
+static void
+add_colors(GLuint n, GLchan rgba[][4], CONST GLchan specular[][4] )
{
GLuint i;
for (i = 0; i < n; i++) {
@@ -761,13 +798,13 @@ static void add_colors(GLuint n, GLchan rgba[][4], CONST GLchan specular[][4] )
* rgba - array of [n] color components
* primitive - either GL_POINT, GL_LINE, GL_POLYGON or GL_BITMAP.
*/
-void _mesa_write_texture_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, const GLdepth z[],
- const GLfloat fog[],
- const GLfloat s[], const GLfloat t[],
- const GLfloat u[], GLfloat lambda[],
- GLchan rgbaIn[][4], CONST GLchan spec[][4],
- GLenum primitive )
+void
+_mesa_write_texture_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLdepth z[], const GLfloat fog[],
+ const GLfloat s[], const GLfloat t[],
+ const GLfloat u[], GLfloat lambda[],
+ GLchan rgbaIn[][4], CONST GLchan spec[][4],
+ const GLfloat coverage[], GLenum primitive )
{
const GLuint colorMask = *((GLuint *) ctx->Color.ColorMask);
GLubyte mask[MAX_WIDTH];
@@ -859,8 +896,9 @@ void _mesa_write_texture_span( GLcontext *ctx,
/* Add base and specular colors */
if (spec &&
(ctx->Fog.ColorSumEnabled ||
- (ctx->Light.Enabled && ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)))
- add_colors( n, rgba, spec ); /* rgba = rgba + spec */
+ (ctx->Light.Enabled &&
+ ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)))
+ add_colors( n, rgba, spec ); /* rgba = rgba + spec */
/* Per-pixel fog */
if (ctx->Fog.Enabled) {
@@ -870,6 +908,14 @@ void _mesa_write_texture_span( GLcontext *ctx,
_mesa_depth_fog_rgba_pixels( ctx, n, z, rgba );
}
+ /* Antialias coverage application */
+ if (coverage) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (GLchan) (rgba[i][ACOMP] * coverage[i]);
+ }
+ }
+
if (swrast->_RasterMask & MULTI_DRAW_BIT) {
multi_write_rgba_span( ctx, n, x, y, (const GLchan (*)[4]) rgba, mask );
}
@@ -903,17 +949,16 @@ void _mesa_write_texture_span( GLcontext *ctx,
* As above but perform multiple stages of texture application.
*/
void
-_mesa_write_multitexture_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
- const GLdepth z[],
- const GLfloat fog[],
- CONST GLfloat s[MAX_TEXTURE_UNITS][MAX_WIDTH],
- CONST GLfloat t[MAX_TEXTURE_UNITS][MAX_WIDTH],
- CONST GLfloat u[MAX_TEXTURE_UNITS][MAX_WIDTH],
- GLfloat lambda[][MAX_WIDTH],
- GLchan rgbaIn[MAX_TEXTURE_UNITS][4],
- CONST GLchan spec[MAX_TEXTURE_UNITS][4],
- GLenum primitive )
+_mesa_write_multitexture_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+ const GLdepth z[], const GLfloat fog[],
+ CONST GLfloat s[MAX_TEXTURE_UNITS][MAX_WIDTH],
+ CONST GLfloat t[MAX_TEXTURE_UNITS][MAX_WIDTH],
+ CONST GLfloat u[MAX_TEXTURE_UNITS][MAX_WIDTH],
+ GLfloat lambda[][MAX_WIDTH],
+ GLchan rgbaIn[MAX_TEXTURE_UNITS][4],
+ CONST GLchan spec[MAX_TEXTURE_UNITS][4],
+ const GLfloat coverage[],
+ GLenum primitive )
{
GLubyte mask[MAX_WIDTH];
GLboolean write_all = GL_TRUE;
@@ -1022,6 +1067,14 @@ _mesa_write_multitexture_span( GLcontext *ctx,
_mesa_depth_fog_rgba_pixels( ctx, n, z, rgba );
}
+ /* Antialias coverage application */
+ if (coverage) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ rgba[i][ACOMP] = (GLchan) (rgba[i][ACOMP] * coverage[i]);
+ }
+ }
+
if (swrast->_RasterMask & MULTI_DRAW_BIT) {
multi_write_rgba_span( ctx, n, x, y, (const GLchan (*)[4]) rgba, mask );
}
@@ -1058,9 +1111,9 @@ _mesa_write_multitexture_span( GLcontext *ctx,
* Read RGBA pixels from frame buffer. Clipping will be done to prevent
* reading ouside the buffer's boundaries.
*/
-void _mesa_read_rgba_span( GLcontext *ctx, GLframebuffer *buffer,
- GLuint n, GLint x, GLint y,
- GLchan rgba[][4] )
+void
+_mesa_read_rgba_span( GLcontext *ctx, GLframebuffer *buffer,
+ GLuint n, GLint x, GLint y, GLchan rgba[][4] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (y < 0 || y >= buffer->Height
@@ -1112,8 +1165,9 @@ void _mesa_read_rgba_span( GLcontext *ctx, GLframebuffer *buffer,
* Read CI pixels from frame buffer. Clipping will be done to prevent
* reading ouside the buffer's boundaries.
*/
-void _mesa_read_index_span( GLcontext *ctx, GLframebuffer *buffer,
- GLuint n, GLint x, GLint y, GLuint indx[] )
+void
+_mesa_read_index_span( GLcontext *ctx, GLframebuffer *buffer,
+ GLuint n, GLint x, GLint y, GLuint indx[] )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
if (y < 0 || y >= buffer->Height
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 00:24:04 +0000