#include "pipe/p_shader_tokens.h"
#include "draw_vs.h"
+#include "draw_fs.h"
#include "draw_pipe.h"
{
struct draw_stage stage;
- uint num_color_attribs;
- uint color_attribs[2]; /* front/back primary colors */
-
- uint num_spec_attribs;
- uint spec_attribs[2]; /* front/back secondary colors */
+ uint num_flat_attribs;
+ uint flat_attribs[PIPE_MAX_SHADER_OUTPUTS]; /* flatshaded attribs */
};
-#define COPY_3FV( DST, SRC ) \
-do { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
-} while (0)
-
static INLINE struct flat_stage *
flat_stage(struct draw_stage *stage)
}
-/** Copy all the color attributes from 'src' vertex to 'dst' vertex */
-static INLINE void copy_colors( struct draw_stage *stage,
- struct vertex_header *dst,
- const struct vertex_header *src )
+/** Copy all the constant attributes from 'src' vertex to 'dst' vertex */
+static INLINE void copy_flats( struct draw_stage *stage,
+ struct vertex_header *dst,
+ const struct vertex_header *src )
{
const struct flat_stage *flat = flat_stage(stage);
uint i;
- for (i = 0; i < flat->num_color_attribs; i++) {
- const uint attr = flat->color_attribs[i];
+ for (i = 0; i < flat->num_flat_attribs; i++) {
+ const uint attr = flat->flat_attribs[i];
COPY_4FV(dst->data[attr], src->data[attr]);
}
-
- for (i = 0; i < flat->num_spec_attribs; i++) {
- const uint attr = flat->spec_attribs[i];
- COPY_3FV(dst->data[attr], src->data[attr]);
- }
}
/** Copy all the color attributes from src vertex to dst0 & dst1 vertices */
-static INLINE void copy_colors2( struct draw_stage *stage,
- struct vertex_header *dst0,
- struct vertex_header *dst1,
- const struct vertex_header *src )
+static INLINE void copy_flats2( struct draw_stage *stage,
+ struct vertex_header *dst0,
+ struct vertex_header *dst1,
+ const struct vertex_header *src )
{
const struct flat_stage *flat = flat_stage(stage);
uint i;
- for (i = 0; i < flat->num_color_attribs; i++) {
- const uint attr = flat->color_attribs[i];
+ for (i = 0; i < flat->num_flat_attribs; i++) {
+ const uint attr = flat->flat_attribs[i];
COPY_4FV(dst0->data[attr], src->data[attr]);
COPY_4FV(dst1->data[attr], src->data[attr]);
}
-
- for (i = 0; i < flat->num_spec_attribs; i++) {
- const uint attr = flat->spec_attribs[i];
- COPY_3FV(dst0->data[attr], src->data[attr]);
- COPY_3FV(dst1->data[attr], src->data[attr]);
- }
}
/**
- * Flatshade tri. Required for clipping and when unfilled tris are
- * active, otherwise handled by hardware.
+ * Flatshade tri. Not required for clipping which handles this on its own,
+ * but required for unfilled tris and other primitive-changing stages
+ * (like widelines). If no such stages are active, handled by hardware.
*/
static void flatshade_tri_0( struct draw_stage *stage,
struct prim_header *header )
tmp.v[1] = dup_vert(stage, header->v[1], 0);
tmp.v[2] = dup_vert(stage, header->v[2], 1);
- copy_colors2(stage, tmp.v[1], tmp.v[2], tmp.v[0]);
-
+ copy_flats2(stage, tmp.v[1], tmp.v[2], tmp.v[0]);
+
stage->next->tri( stage->next, &tmp );
}
tmp.v[1] = dup_vert(stage, header->v[1], 1);
tmp.v[2] = header->v[2];
- copy_colors2(stage, tmp.v[0], tmp.v[1], tmp.v[2]);
-
+ copy_flats2(stage, tmp.v[0], tmp.v[1], tmp.v[2]);
+
stage->next->tri( stage->next, &tmp );
}
/**
- * Flatshade line. Required for clipping.
+ * Flatshade line.
*/
static void flatshade_line_0( struct draw_stage *stage,
struct prim_header *header )
tmp.v[0] = header->v[0];
tmp.v[1] = dup_vert(stage, header->v[1], 0);
- copy_colors(stage, tmp.v[1], tmp.v[0]);
-
+ copy_flats(stage, tmp.v[1], tmp.v[0]);
+
stage->next->line( stage->next, &tmp );
}
+
static void flatshade_line_1( struct draw_stage *stage,
struct prim_header *header )
{
tmp.v[0] = dup_vert(stage, header->v[0], 0);
tmp.v[1] = header->v[1];
- copy_colors(stage, tmp.v[0], tmp.v[1]);
-
+ copy_flats(stage, tmp.v[0], tmp.v[1]);
+
stage->next->line( stage->next, &tmp );
}
+static int
+find_interp(const struct draw_fragment_shader *fs, int *indexed_interp,
+ uint semantic_name, uint semantic_index)
+{
+ int interp;
+ /* If it's gl_{Front,Back}{,Secondary}Color, pick up the mode
+ * from the array we've filled before. */
+ if (semantic_name == TGSI_SEMANTIC_COLOR ||
+ semantic_name == TGSI_SEMANTIC_BCOLOR) {
+ interp = indexed_interp[semantic_index];
+ } else {
+ /* Otherwise, search in the FS inputs, with a decent default
+ * if we don't find it.
+ */
+ uint j;
+ interp = TGSI_INTERPOLATE_PERSPECTIVE;
+ if (fs) {
+ for (j = 0; j < fs->info.num_inputs; j++) {
+ if (semantic_name == fs->info.input_semantic_name[j] &&
+ semantic_index == fs->info.input_semantic_index[j]) {
+ interp = fs->info.input_interpolate[j];
+ break;
+ }
+ }
+ }
+ }
+ return interp;
+}
static void flatshade_init_state( struct draw_stage *stage )
{
struct flat_stage *flat = flat_stage(stage);
- const struct draw_vertex_shader *vs = stage->draw->vs.vertex_shader;
- uint i;
+ const struct draw_context *draw = stage->draw;
+ const struct draw_fragment_shader *fs = draw->fs.fragment_shader;
+ const struct tgsi_shader_info *info = draw_get_shader_info(draw);
+ uint i, j;
+
+ /* Find which vertex shader outputs need constant interpolation, make a list */
+
+ /* XXX: this code is a near exact copy of the one in clip_init_state.
+ * The latter also cares about perspective though.
+ */
- /* Find which vertex shader outputs are colors, make a list */
- flat->num_color_attribs = 0;
- flat->num_spec_attribs = 0;
- for (i = 0; i < vs->info.num_outputs; i++) {
- if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_COLOR ||
- vs->info.output_semantic_name[i] == TGSI_SEMANTIC_BCOLOR) {
- if (vs->info.output_semantic_index[i] == 0)
- flat->color_attribs[flat->num_color_attribs++] = i;
- else
- flat->spec_attribs[flat->num_spec_attribs++] = i;
+ /* First pick up the interpolation mode for
+ * gl_Color/gl_SecondaryColor, with the correct default.
+ */
+ int indexed_interp[2];
+ indexed_interp[0] = indexed_interp[1] = draw->rasterizer->flatshade ?
+ TGSI_INTERPOLATE_CONSTANT : TGSI_INTERPOLATE_PERSPECTIVE;
+
+ if (fs) {
+ for (i = 0; i < fs->info.num_inputs; i++) {
+ if (fs->info.input_semantic_name[i] == TGSI_SEMANTIC_COLOR) {
+ if (fs->info.input_interpolate[i] != TGSI_INTERPOLATE_COLOR)
+ indexed_interp[fs->info.input_semantic_index[i]] = fs->info.input_interpolate[i];
+ }
+ }
+ }
+
+ /* Then resolve the interpolation mode for every output attribute.
+ *
+ * Given how the rest of the code, the most efficient way is to
+ * have a vector of flat-mode attributes.
+ */
+ flat->num_flat_attribs = 0;
+ for (i = 0; i < info->num_outputs; i++) {
+ /* Find the interpolation mode for a specific attribute */
+ int interp = find_interp(fs, indexed_interp,
+ info->output_semantic_name[i],
+ info->output_semantic_index[i]);
+ /* If it's flat, add it to the flat vector. */
+
+ if (interp == TGSI_INTERPOLATE_CONSTANT) {
+ flat->flat_attribs[flat->num_flat_attribs] = i;
+ flat->num_flat_attribs++;
+ }
+ }
+ /* Search the extra vertex attributes */
+ for (j = 0; j < draw->extra_shader_outputs.num; j++) {
+ /* Find the interpolation mode for a specific attribute */
+ int interp = find_interp(fs, indexed_interp,
+ draw->extra_shader_outputs.semantic_name[j],
+ draw->extra_shader_outputs.semantic_index[j]);
+ /* If it's flat, add it to the flat vector. */
+ if (interp == TGSI_INTERPOLATE_CONSTANT) {
+ flat->flat_attribs[flat->num_flat_attribs] = i + j;
+ flat->num_flat_attribs++;
}
}
/* Choose flatshade routine according to provoking vertex:
*/
- if (stage->draw->rasterizer->flatshade_first) {
+ if (draw->rasterizer->flatshade_first) {
stage->line = flatshade_line_0;
stage->tri = flatshade_tri_0;
}
}
static void flatshade_first_tri( struct draw_stage *stage,
- struct prim_header *header )
+ struct prim_header *header )
{
flatshade_init_state( stage );
stage->tri( stage, header );
}
static void flatshade_first_line( struct draw_stage *stage,
- struct prim_header *header )
+ struct prim_header *header )
{
flatshade_init_state( stage );
stage->line( stage, header );
static void flatshade_flush( struct draw_stage *stage,
- unsigned flags )
+ unsigned flags )
{
stage->tri = flatshade_first_tri;
stage->line = flatshade_first_line;
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