X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fviewport.c;h=6545bf68a778f41a6ee93108107a2bb017563be0;hb=c7def2257aae3b73ba37609dfbc0a0f35fa99c81;hp=4747022d0b42c02aa2711925d825f02acc846625;hpb=f9995b30756140724f41daf963fa06167912be7f;p=mesa.git

diff --git a/src/mesa/main/viewport.c b/src/mesa/main/viewport.c
index 4747022d0b4..6545bf68a77 100644
--- a/src/mesa/main/viewport.c
+++ b/src/mesa/main/viewport.c
@@ -1,6 +1,5 @@
 /*
  * Mesa 3-D graphics library
- * Version:  7.5
  *
  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
  *
@@ -17,9 +16,10 @@
  * 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.
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
  */
 
 
@@ -31,8 +31,63 @@
 
 #include "context.h"
 #include "macros.h"
+#include "mtypes.h"
 #include "viewport.h"
 
+static void
+set_viewport_no_notify(struct gl_context *ctx, unsigned idx,
+                       GLfloat x, GLfloat y,
+                       GLfloat width, GLfloat height)
+{
+   /* clamp width and height to the implementation dependent range */
+   width  = MIN2(width, (GLfloat) ctx->Const.MaxViewportWidth);
+   height = MIN2(height, (GLfloat) ctx->Const.MaxViewportHeight);
+
+   /* The GL_ARB_viewport_array spec says:
+    *
+    *     "The location of the viewport's bottom-left corner, given by (x,y),
+    *     are clamped to be within the implementation-dependent viewport
+    *     bounds range.  The viewport bounds range [min, max] tuple may be
+    *     determined by calling GetFloatv with the symbolic constant
+    *     VIEWPORT_BOUNDS_RANGE (see section 6.1)."
+    */
+   if (ctx->Extensions.ARB_viewport_array) {
+      x = CLAMP(x,
+                ctx->Const.ViewportBounds.Min, ctx->Const.ViewportBounds.Max);
+      y = CLAMP(y,
+                ctx->Const.ViewportBounds.Min, ctx->Const.ViewportBounds.Max);
+   }
+
+   ctx->ViewportArray[idx].X = x;
+   ctx->ViewportArray[idx].Width = width;
+   ctx->ViewportArray[idx].Y = y;
+   ctx->ViewportArray[idx].Height = height;
+   ctx->NewState |= _NEW_VIEWPORT;
+
+#if 1
+   /* XXX remove this someday.  Currently the DRI drivers rely on
+    * the WindowMap matrix being up to date in the driver's Viewport
+    * and DepthRange functions.
+    */
+   _math_matrix_viewport(&ctx->ViewportArray[idx]._WindowMap,
+                         ctx->ViewportArray[idx].X,
+                         ctx->ViewportArray[idx].Y,
+                         ctx->ViewportArray[idx].Width,
+                         ctx->ViewportArray[idx].Height,
+                         ctx->ViewportArray[idx].Near,
+                         ctx->ViewportArray[idx].Far,
+                         ctx->DrawBuffer->_DepthMaxF);
+#endif
+}
+
+struct gl_viewport_inputs {
+   GLfloat X, Y;                /**< position */
+   GLfloat Width, Height;       /**< size */
+};
+
+struct gl_depthrange_inputs {
+   GLdouble Near, Far;          /**< Depth buffer range */
+};
 
 /**
  * Set the viewport.
@@ -44,9 +99,39 @@
 void GLAPIENTRY
 _mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei height)
 {
+   unsigned i;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-   _mesa_set_viewport(ctx, x, y, width, height);
+   FLUSH_VERTICES(ctx, 0);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glViewport %d %d %d %d\n", x, y, width, height);
+
+   if (width < 0 || height < 0) {
+      _mesa_error(ctx,  GL_INVALID_VALUE,
+                   "glViewport(%d, %d, %d, %d)", x, y, width, height);
+      return;
+   }
+
+   /* The GL_ARB_viewport_array spec says:
+    *
+    *     "Viewport sets the parameters for all viewports to the same values
+    *     and is equivalent (assuming no errors are generated) to:
+    *
+    *     for (uint i = 0; i < MAX_VIEWPORTS; i++)
+    *         ViewportIndexedf(i, 1, (float)x, (float)y, (float)w, (float)h);"
+    *
+    * Set all of the viewports supported by the implementation, but only
+    * signal the driver once at the end.
+    */
+   for (i = 0; i < ctx->Const.MaxViewports; i++)
+      set_viewport_no_notify(ctx, i, x, y, width, height);
+
+   if (ctx->Driver.Viewport) {
+      /* Many drivers will use this call to check for window size changes
+       * and reallocate the z/stencil/accum/etc buffers if needed.
+       */
+      ctx->Driver.Viewport(ctx);
+   }
 }
 
 
@@ -55,31 +140,114 @@ _mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei height)
  * matrix).  Usually called from _mesa_Viewport().
  * 
  * \param ctx GL context.
+ * \param idx    Index of the viewport to be updated.
  * \param x, y coordinates of the lower left corner of the viewport rectangle.
  * \param width width of the viewport rectangle.
  * \param height height of the viewport rectangle.
  */
 void
-_mesa_set_viewport(struct gl_context *ctx, GLint x, GLint y,
-                    GLsizei width, GLsizei height)
+_mesa_set_viewport(struct gl_context *ctx, unsigned idx, GLfloat x, GLfloat y,
+                    GLfloat width, GLfloat height)
 {
+   set_viewport_no_notify(ctx, idx, x, y, width, height);
+
+   if (ctx->Driver.Viewport) {
+      /* Many drivers will use this call to check for window size changes
+       * and reallocate the z/stencil/accum/etc buffers if needed.
+       */
+      ctx->Driver.Viewport(ctx);
+   }
+}
+
+void GLAPIENTRY
+_mesa_ViewportArrayv(GLuint first, GLsizei count, const GLfloat *v)
+{
+   int i;
+   const struct gl_viewport_inputs *const p = (struct gl_viewport_inputs *) v;
+   GET_CURRENT_CONTEXT(ctx);
+
    if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "glViewport %d %d %d %d\n", x, y, width, height);
+      _mesa_debug(ctx, "glViewportArrayv %d %d\n", first, count);
 
-   if (width < 0 || height < 0) {
-      _mesa_error(ctx,  GL_INVALID_VALUE,
-                   "glViewport(%d, %d, %d, %d)", x, y, width, height);
+   if ((first + count) > ctx->Const.MaxViewports) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glViewportArrayv: first (%d) + count (%d) > MaxViewports "
+                  "(%d)",
+                  first, count, ctx->Const.MaxViewports);
       return;
    }
 
-   /* clamp width and height to the implementation dependent range */
-   width  = MIN2(width, (GLsizei) ctx->Const.MaxViewportWidth);
-   height = MIN2(height, (GLsizei) ctx->Const.MaxViewportHeight);
+   /* Verify width & height */
+   for (i = 0; i < count; i++) {
+      if (p[i].Width < 0 || p[i].Height < 0) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glViewportArrayv: index (%d) width or height < 0 "
+                     "(%f, %f)",
+                     i + first, p[i].Width, p[i].Height);
+         return;
+      }
+   }
+
+   for (i = 0; i < count; i++)
+      set_viewport_no_notify(ctx, i + first,
+                             p[i].X, p[i].Y,
+                             p[i].Width, p[i].Height);
+
+   if (ctx->Driver.Viewport)
+      ctx->Driver.Viewport(ctx);
+}
+
+static void
+ViewportIndexedf(GLuint index, GLfloat x, GLfloat y,
+                 GLfloat w, GLfloat h, const char *function)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "%s(%d, %f, %f, %f, %f)\n",
+                  function, index, x, y, w, h);
+
+   if (index >= ctx->Const.MaxViewports) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "%s: index (%d) >= MaxViewports (%d)",
+                  function, index, ctx->Const.MaxViewports);
+      return;
+   }
+
+   /* Verify width & height */
+   if (w < 0 || h < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "%s: index (%d) width or height < 0 (%f, %f)",
+                  function, index, w, h);
+      return;
+   }
+
+   _mesa_set_viewport(ctx, index, x, y, w, h);
+}
 
-   ctx->Viewport.X = x;
-   ctx->Viewport.Width = width;
-   ctx->Viewport.Y = y;
-   ctx->Viewport.Height = height;
+void GLAPIENTRY
+_mesa_ViewportIndexedf(GLuint index, GLfloat x, GLfloat y,
+                       GLfloat w, GLfloat h)
+{
+   ViewportIndexedf(index, x, y, w, h, "glViewportIndexedf");
+}
+
+void GLAPIENTRY
+_mesa_ViewportIndexedfv(GLuint index, const GLfloat *v)
+{
+   ViewportIndexedf(index, v[0], v[1], v[2], v[3], "glViewportIndexedfv");
+}
+
+static void
+set_depth_range_no_notify(struct gl_context *ctx, unsigned idx,
+                          GLclampd nearval, GLclampd farval)
+{
+   if (ctx->ViewportArray[idx].Near == nearval &&
+       ctx->ViewportArray[idx].Far == farval)
+      return;
+
+   ctx->ViewportArray[idx].Near = CLAMP(nearval, 0.0, 1.0);
+   ctx->ViewportArray[idx].Far = CLAMP(farval, 0.0, 1.0);
    ctx->NewState |= _NEW_VIEWPORT;
 
 #if 1
@@ -87,21 +255,26 @@ _mesa_set_viewport(struct gl_context *ctx, GLint x, GLint y,
     * the WindowMap matrix being up to date in the driver's Viewport
     * and DepthRange functions.
     */
-   _math_matrix_viewport(&ctx->Viewport._WindowMap,
-                         ctx->Viewport.X, ctx->Viewport.Y,
-                         ctx->Viewport.Width, ctx->Viewport.Height,
-                         ctx->Viewport.Near, ctx->Viewport.Far,
+   _math_matrix_viewport(&ctx->ViewportArray[idx]._WindowMap,
+                         ctx->ViewportArray[idx].X,
+                         ctx->ViewportArray[idx].Y,
+                         ctx->ViewportArray[idx].Width,
+                         ctx->ViewportArray[idx].Height,
+                         ctx->ViewportArray[idx].Near,
+                         ctx->ViewportArray[idx].Far,
                          ctx->DrawBuffer->_DepthMaxF);
 #endif
-
-   if (ctx->Driver.Viewport) {
-      /* Many drivers will use this call to check for window size changes
-       * and reallocate the z/stencil/accum/etc buffers if needed.
-       */
-      ctx->Driver.Viewport(ctx, x, y, width, height);
-   }
 }
 
+void
+_mesa_set_depth_range(struct gl_context *ctx, unsigned idx,
+                      GLclampd nearval, GLclampd farval)
+{
+   set_depth_range_no_notify(ctx, idx, nearval, farval);
+
+   if (ctx->Driver.DepthRange)
+      ctx->Driver.DepthRange(ctx);
+}
 
 /**
  * Called by glDepthRange
@@ -114,38 +287,99 @@ _mesa_set_viewport(struct gl_context *ctx, GLint x, GLint y,
 void GLAPIENTRY
 _mesa_DepthRange(GLclampd nearval, GLclampd farval)
 {
+   unsigned i;
    GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   FLUSH_VERTICES(ctx, 0);
 
    if (MESA_VERBOSE&VERBOSE_API)
       _mesa_debug(ctx, "glDepthRange %f %f\n", nearval, farval);
 
-   if (ctx->Viewport.Near == nearval &&
-       ctx->Viewport.Far == farval)
-      return;
-
-   ctx->Viewport.Near = (GLfloat) CLAMP(nearval, 0.0, 1.0);
-   ctx->Viewport.Far = (GLfloat) CLAMP(farval, 0.0, 1.0);
-   ctx->NewState |= _NEW_VIEWPORT;
-
-#if 1
-   /* XXX remove this someday.  Currently the DRI drivers rely on
-    * the WindowMap matrix being up to date in the driver's Viewport
-    * and DepthRange functions.
+   /* The GL_ARB_viewport_array spec says:
+    *
+    *     "DepthRange sets the depth range for all viewports to the same
+    *     values and is equivalent (assuming no errors are generated) to:
+    *
+    *     for (uint i = 0; i < MAX_VIEWPORTS; i++)
+    *         DepthRangeIndexed(i, n, f);"
+    *
+    * Set the depth range for all of the viewports supported by the
+    * implementation, but only signal the driver once at the end.
     */
-   _math_matrix_viewport(&ctx->Viewport._WindowMap,
-                         ctx->Viewport.X, ctx->Viewport.Y,
-                         ctx->Viewport.Width, ctx->Viewport.Height,
-                         ctx->Viewport.Near, ctx->Viewport.Far,
-                         ctx->DrawBuffer->_DepthMaxF);
-#endif
+   for (i = 0; i < ctx->Const.MaxViewports; i++)
+      set_depth_range_no_notify(ctx, i, nearval, farval);
 
    if (ctx->Driver.DepthRange) {
-      ctx->Driver.DepthRange(ctx, nearval, farval);
+      ctx->Driver.DepthRange(ctx);
    }
 }
 
+void GLAPIENTRY
+_mesa_DepthRangef(GLclampf nearval, GLclampf farval)
+{
+   _mesa_DepthRange(nearval, farval);
+}
 
+/**
+ * Update a range DepthRange values
+ *
+ * \param first   starting array index
+ * \param count   count of DepthRange items to update
+ * \param v       pointer to memory containing
+ *                GLclampd near and far clip-plane values
+ */
+void GLAPIENTRY
+_mesa_DepthRangeArrayv(GLuint first, GLsizei count, const GLclampd *v)
+{
+   int i;
+   const struct gl_depthrange_inputs *const p =
+      (struct gl_depthrange_inputs *) v;
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glDepthRangeArrayv %d %d\n", first, count);
+
+   if ((first + count) > ctx->Const.MaxViewports) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glDepthRangev: first (%d) + count (%d) >= MaxViewports (%d)",
+                  first, count, ctx->Const.MaxViewports);
+      return;
+   }
+
+   for (i = 0; i < count; i++)
+      set_depth_range_no_notify(ctx, i + first, p[i].Near, p[i].Far);
+
+   if (ctx->Driver.DepthRange)
+      ctx->Driver.DepthRange(ctx);
+}
+
+/**
+ * Update a single DepthRange
+ *
+ * \param index    array index to update
+ * \param nearval  specifies the Z buffer value which should correspond to
+ *                 the near clip plane
+ * \param farval   specifies the Z buffer value which should correspond to
+ *                 the far clip plane
+ */
+void GLAPIENTRY
+_mesa_DepthRangeIndexed(GLuint index, GLclampd nearval, GLclampd farval)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glDepthRangeIndexed(%d, %f, %f)\n",
+                  index, nearval, farval);
+
+   if (index >= ctx->Const.MaxViewports) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glDepthRangeIndexed: index (%d) >= MaxViewports (%d)",
+                  index, ctx->Const.MaxViewports);
+      return;
+   }
+
+   _mesa_set_depth_range(ctx, index, nearval, farval);
+}
 
 /** 
  * Initialize the context viewport attribute group.
@@ -154,18 +388,24 @@ _mesa_DepthRange(GLclampd nearval, GLclampd farval)
 void _mesa_init_viewport(struct gl_context *ctx)
 {
    GLfloat depthMax = 65535.0F; /* sorf of arbitrary */
+   unsigned i;
 
-   /* Viewport group */
-   ctx->Viewport.X = 0;
-   ctx->Viewport.Y = 0;
-   ctx->Viewport.Width = 0;
-   ctx->Viewport.Height = 0;
-   ctx->Viewport.Near = 0.0;
-   ctx->Viewport.Far = 1.0;
-   _math_matrix_ctr(&ctx->Viewport._WindowMap);
-
-   _math_matrix_viewport(&ctx->Viewport._WindowMap, 0, 0, 0, 0,
-                         0.0F, 1.0F, depthMax);
+   /* Note: ctx->Const.MaxViewports may not have been set by the driver yet,
+    * so just initialize all of them.
+    */
+   for (i = 0; i < MAX_VIEWPORTS; i++) {
+      /* Viewport group */
+      ctx->ViewportArray[i].X = 0;
+      ctx->ViewportArray[i].Y = 0;
+      ctx->ViewportArray[i].Width = 0;
+      ctx->ViewportArray[i].Height = 0;
+      ctx->ViewportArray[i].Near = 0.0;
+      ctx->ViewportArray[i].Far = 1.0;
+      _math_matrix_ctr(&ctx->ViewportArray[i]._WindowMap);
+
+      _math_matrix_viewport(&ctx->ViewportArray[i]._WindowMap, 0, 0, 0, 0,
+                            0.0F, 1.0F, depthMax);
+   }
 }
 
 
@@ -175,6 +415,9 @@ void _mesa_init_viewport(struct gl_context *ctx)
  */
 void _mesa_free_viewport_data(struct gl_context *ctx)
 {
-   _math_matrix_dtr(&ctx->Viewport._WindowMap);
+   unsigned i;
+
+   for (i = 0; i < MAX_VIEWPORTS; i++)
+      _math_matrix_dtr(&ctx->ViewportArray[i]._WindowMap);
 }