diff options
Diffstat (limited to 'src/mesa/drivers/dos/mga/m_ttemp.h')
| -rw-r--r-- | src/mesa/drivers/dos/mga/m_ttemp.h | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/src/mesa/drivers/dos/mga/m_ttemp.h b/src/mesa/drivers/dos/mga/m_ttemp.h new file mode 100644 index 0000000000..d3de69a825 --- /dev/null +++ b/src/mesa/drivers/dos/mga/m_ttemp.h @@ -0,0 +1,377 @@ +/*
+ * Mesa 3-D graphics library
+ * Version: 5.0
+ *
+ * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * 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.
+ */
+
+/*
+ * DOS/DJGPP device driver v1.3 for Mesa 5.0 -- MGA2064W triangle template
+ *
+ * Copyright (c) 2003 - Borca Daniel
+ * Email : dborca@yahoo.com
+ * Web : http://www.geocities.com/dborca
+ */
+
+
+/*
+ * Triangle Rasterizer Template
+ *
+ * This file is #include'd to generate custom triangle rasterizers.
+ *
+ * The following macros may be defined to indicate what auxillary information
+ * must be interplated across the triangle:
+ * INTERP_Z - if defined, interpolate Z values
+ * INTERP_RGB - if defined, interpolate RGB values
+ *
+ * TAG - function name
+ * CULL - enable culling for: 0=no, 1=back, -1=front
+ *
+ * SETUP_CODE - to be executed once per triangle (usually HW init)
+ *
+ * For flatshaded primitives, the provoking vertex is the final one.
+ * This code was designed for the origin to be in the upper-left corner.
+ *
+ * Inspired by triangle rasterizer code written by Brian Paul.
+ */
+
+
+
+#define TRI_SWAP(a, b) \
+do { \
+ const MGAvertex *tmp = a; \
+ a = b; \
+ b = tmp; \
+} while (0)
+
+void TAG (int cull, const MGAvertex *v1, const MGAvertex *v2, const MGAvertex *v3)
+{
+ int area;
+ int x1, y1, x2, y2, x3, y3;
+ int eMaj_dx, eMaj_dy, eBot_dx, eBot_dy, eTop_dx, eTop_dy;
+#ifdef INTERP_RGB
+#define FIFO_CNT_RGB 3
+ int eMaj_dr, eBot_dr, eMaj_dg, eBot_dg, eMaj_db, eBot_db;
+ int drdx, drdy, dgdx, dgdy, dbdx, dbdy;
+#else
+#define FIFO_CNT_RGB 0
+#endif
+#ifdef INTERP_Z
+#define FIFO_CNT_Z 1
+ int dzdx, dzdy;
+ int eMaj_dz, eBot_dz;
+ int z1, z2, z3;
+#else
+#define FIFO_CNT_Z 0
+#endif
+
+#if defined(INTERP_Z) || defined(INTERP_RGB)
+ double one_area;
+#ifndef INTERP_RGB
+ int red = v3->color[0];
+ int green = v3->color[1];
+ int blue = v3->color[2];
+#endif
+#else
+ unsigned long color = mga_mixrgb_full(v3->color);
+#endif
+
+ int sgn = 0;
+
+ /* sort along the vertical axis */
+ if (v2->win[1] < v1->win[1]) {
+ TRI_SWAP(v1, v2);
+#ifdef CULL
+ cull = -cull;
+#endif
+ }
+
+ if (v3->win[1] < v1->win[1]) {
+ TRI_SWAP(v1, v3);
+ TRI_SWAP(v2, v3);
+ } else if (v3->win[1] < v2->win[1]) {
+ TRI_SWAP(v2, v3);
+#ifdef CULL
+ cull = -cull;
+#endif
+ }
+
+ x1 = v1->win[0];
+ y1 = v1->win[1];
+ x2 = v2->win[0];
+ y2 = v2->win[1];
+ x3 = v3->win[0];
+ y3 = v3->win[1];
+
+ /* compute deltas for each edge */
+ eMaj_dx = x3 - x1;
+ eMaj_dy = y3 - y1;
+ eBot_dx = x2 - x1;
+ eBot_dy = y2 - y1;
+ eTop_dx = x3 - x2;
+ eTop_dy = y3 - y2;
+
+ /* compute area */
+ if ((area = eMaj_dx * eBot_dy - eBot_dx * eMaj_dy) == 0) {
+ return;
+ }
+#ifdef CULL
+ if ((area * cull) > 0) {
+ return;
+ }
+#endif
+
+ mga_select();
+
+ /* set engine state */
+#ifdef SETUP_CODE
+ SETUP_CODE
+#endif
+
+ /* draw lower triangle */
+#if defined(INTERP_Z) || defined(INTERP_RGB)
+ one_area = (double)(1<<15) / (double)area;
+ mga_fifo(1);
+#else
+ mga_fifo(2);
+ mga_outl(M_FCOL, color);
+#endif
+ mga_outl(M_YDST, y1);
+
+#ifdef INTERP_Z
+ z1 = v1->win[2];
+ z2 = v2->win[2];
+ z3 = v3->win[2];
+
+ /* compute d?/dx and d?/dy derivatives */
+ eMaj_dz = z3 - z1;
+ eBot_dz = z2 - z1;
+ dzdx = (eMaj_dz * eBot_dy - eMaj_dy * eBot_dz) * one_area;
+ dzdy = (eMaj_dx * eBot_dz - eMaj_dz * eBot_dx) * one_area;
+
+#ifndef INTERP_RGB
+ mga_fifo(11);
+ mga_outl(M_DR2, dzdx);
+ mga_outl(M_DR3, dzdy);
+ mga_outl(M_DR4, red<<15);
+ mga_outl(M_DR6, 0);
+ mga_outl(M_DR7, 0);
+ mga_outl(M_DR8, green<<15);
+ mga_outl(M_DR10, 0);
+ mga_outl(M_DR11, 0);
+ mga_outl(M_DR12, blue<<15);
+ mga_outl(M_DR14, 0);
+ mga_outl(M_DR15, 0);
+#else
+ mga_fifo(2);
+ mga_outl(M_DR2, dzdx);
+ mga_outl(M_DR3, dzdy);
+#endif
+#endif
+
+#ifdef INTERP_RGB
+ /* compute color deltas */
+ eMaj_dr = v3->color[0] - v1->color[0];
+ eBot_dr = v2->color[0] - v1->color[0];
+ eMaj_dg = v3->color[1] - v1->color[1];
+ eBot_dg = v2->color[1] - v1->color[1];
+ eMaj_db = v3->color[2] - v1->color[2];
+ eBot_db = v2->color[2] - v1->color[2];
+
+ /* compute color increments */
+ drdx = (eMaj_dr * eBot_dy - eMaj_dy * eBot_dr) * one_area;
+ drdy = (eMaj_dx * eBot_dr - eMaj_dr * eBot_dx) * one_area;
+ dgdx = (eMaj_dg * eBot_dy - eMaj_dy * eBot_dg) * one_area;
+ dgdy = (eMaj_dx * eBot_dg - eMaj_dg * eBot_dx) * one_area;
+ dbdx = (eMaj_db * eBot_dy - eMaj_dy * eBot_db) * one_area;
+ dbdy = (eMaj_dx * eBot_db - eMaj_db * eBot_dx) * one_area;
+
+ mga_fifo(6);
+ mga_outl(M_DR6, drdx);
+ mga_outl(M_DR7, drdy);
+ mga_outl(M_DR10, dgdx);
+ mga_outl(M_DR11, dgdy);
+ mga_outl(M_DR14, dbdx);
+ mga_outl(M_DR15, dbdy);
+#endif
+
+ if (area > 0) { /* major edge on the right */
+ if (eBot_dy) { /* have lower triangle */
+ mga_fifo(9 + FIFO_CNT_Z + FIFO_CNT_RGB);
+
+ mga_outl(M_AR0, eBot_dy);
+ if (x2 < x1) {
+ mga_outl(M_AR1, eBot_dx + eBot_dy - 1);
+ mga_outl(M_AR2, eBot_dx);
+ sgn |= M_SDXL;
+ } else {
+ mga_outl(M_AR1, -eBot_dx);
+ mga_outl(M_AR2, -eBot_dx);
+ }
+
+ mga_outl(M_AR6, eMaj_dy);
+ if (x3 < x1) {
+ mga_outl(M_AR4, eMaj_dx + eMaj_dy - 1);
+ mga_outl(M_AR5, eMaj_dx);
+ sgn |= M_SDXR;
+ } else {
+ mga_outl(M_AR4, -eMaj_dx);
+ mga_outl(M_AR5, -eMaj_dx);
+ }
+
+ mga_outl(M_FXBNDRY, (x1<<16) | x1);
+#ifdef INTERP_Z
+ mga_outl(M_DR0, z1<<15);
+#endif
+#ifdef INTERP_RGB
+ mga_outl(M_DR4, v1->color[0]<<15);
+ mga_outl(M_DR8, v1->color[1]<<15);
+ mga_outl(M_DR12, v1->color[2]<<15);
+#endif
+ mga_outl(M_SGN, sgn);
+ mga_outl(M_LEN | M_EXEC, eBot_dy);
+ } else { /* no lower triangle */
+ mga_fifo(4 + FIFO_CNT_Z + FIFO_CNT_RGB);
+
+ mga_outl(M_AR6, eMaj_dy);
+ if (x3 < x1) {
+ mga_outl(M_AR4, eMaj_dx + eMaj_dy - 1);
+ mga_outl(M_AR5, eMaj_dx);
+ sgn |= M_SDXR;
+ } else {
+ mga_outl(M_AR4, -eMaj_dx);
+ mga_outl(M_AR5, -eMaj_dx);
+ }
+
+ mga_outl(M_FXBNDRY, (x1<<16) | x2);
+#ifdef INTERP_Z
+ mga_outl(M_DR0, z2<<15);
+#endif
+#ifdef INTERP_RGB
+ mga_outl(M_DR4, v2->color[0]<<15);
+ mga_outl(M_DR8, v2->color[1]<<15);
+ mga_outl(M_DR12, v2->color[2]<<15);
+#endif
+ }
+
+ /* draw upper triangle */
+ if (eTop_dy) {
+ mga_fifo(5);
+ mga_outl(M_AR0, eTop_dy);
+ if (x3 < x2) {
+ mga_outl(M_AR1, eTop_dx + eTop_dy - 1);
+ mga_outl(M_AR2, eTop_dx);
+ sgn |= M_SDXL;
+ } else {
+ mga_outl(M_AR1, -eTop_dx);
+ mga_outl(M_AR2, -eTop_dx);
+ sgn &= ~M_SDXL;
+ }
+ mga_outl(M_SGN, sgn);
+ mga_outl(M_LEN | M_EXEC, eTop_dy);
+ }
+ } else { /* major edge on the left */
+ if (eBot_dy) { /* have lower triangle */
+ mga_fifo(9 + FIFO_CNT_Z + FIFO_CNT_RGB);
+
+ mga_outl(M_AR0, eMaj_dy);
+ if (x3 < x1) {
+ mga_outl(M_AR1, eMaj_dx + eMaj_dy - 1);
+ mga_outl(M_AR2, eMaj_dx);
+ sgn |= M_SDXL;
+ } else {
+ mga_outl(M_AR1, -eMaj_dx);
+ mga_outl(M_AR2, -eMaj_dx);
+ }
+
+ mga_outl(M_AR6, eBot_dy);
+ if (x2 < x1) {
+ mga_outl(M_AR4, eBot_dx + eBot_dy - 1);
+ mga_outl(M_AR5, eBot_dx);
+ sgn |= M_SDXR;
+ } else {
+ mga_outl(M_AR4, -eBot_dx);
+ mga_outl(M_AR5, -eBot_dx);
+ }
+
+ mga_outl(M_FXBNDRY, (x1<<16) | x1);
+#ifdef INTERP_Z
+ mga_outl(M_DR0, z1<<15);
+#endif
+#ifdef INTERP_RGB
+ mga_outl(M_DR4, v1->color[0]<<15);
+ mga_outl(M_DR8, v1->color[1]<<15);
+ mga_outl(M_DR12, v1->color[2]<<15);
+#endif
+ mga_outl(M_SGN, sgn);
+ mga_outl(M_LEN | M_EXEC, eBot_dy);
+ } else { /* no lower triangle */
+ mga_fifo(4 + FIFO_CNT_Z + FIFO_CNT_RGB);
+
+ mga_outl(M_AR0, eMaj_dy);
+ if (x3 < x1) {
+ mga_outl(M_AR1, eMaj_dx + eMaj_dy - 1);
+ mga_outl(M_AR2, eMaj_dx);
+ sgn |= M_SDXL;
+ } else {
+ mga_outl(M_AR1, -eMaj_dx);
+ mga_outl(M_AR2, -eMaj_dx);
+ }
+
+ mga_outl(M_FXBNDRY, (x2<<16) | x1);
+#ifdef INTERP_Z
+ mga_outl(M_DR0, z1<<15);
+#endif
+#ifdef INTERP_RGB
+ mga_outl(M_DR4, v1->color[0]<<15);
+ mga_outl(M_DR8, v1->color[1]<<15);
+ mga_outl(M_DR12, v1->color[2]<<15);
+#endif
+ }
+
+ /* draw upper triangle */
+ if (eTop_dy) {
+ mga_fifo(5);
+ mga_outl(M_AR6, eTop_dy);
+ if (x3 < x2) {
+ mga_outl(M_AR4, eTop_dx + eTop_dy - 1);
+ mga_outl(M_AR5, eTop_dx);
+ sgn |= M_SDXR;
+ } else {
+ mga_outl(M_AR4, -eTop_dx);
+ mga_outl(M_AR5, -eTop_dx);
+ sgn &= ~M_SDXR;
+ }
+ mga_outl(M_SGN, sgn);
+ mga_outl(M_LEN | M_EXEC, eTop_dy);
+ }
+ }
+}
+
+#undef FIFO_CNT_RGB
+#undef FIFO_CNT_Z
+
+#undef TRI_SWAP
+
+#undef SETUP_CODE
+#undef INTERP_RGB
+#undef INTERP_Z
+#undef CULL
+#undef TAG
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