Mesa (master): mesa: add viewport() helper
Samuel Pitoiset
hakzsam at kemper.freedesktop.org
Fri Jun 23 07:28:35 UTC 2017
Module: Mesa
Branch: master
Commit: ad0afa87b8cf8a8783df740d63fe852c2ebba90f
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ad0afa87b8cf8a8783df740d63fe852c2ebba90f
Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date: Thu Jun 22 15:26:32 2017 +0200
mesa: add viewport() helper
Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Timothy Arceri <tarceri at itsqueeze.com>
---
src/mesa/main/viewport.c | 48 +++++++++++++++++++++++++++---------------------
1 file changed, 27 insertions(+), 21 deletions(-)
diff --git a/src/mesa/main/viewport.c b/src/mesa/main/viewport.c
index af453fd259..b18168a4d4 100644
--- a/src/mesa/main/viewport.c
+++ b/src/mesa/main/viewport.c
@@ -85,6 +85,32 @@ struct gl_depthrange_inputs {
GLdouble Near, Far; /**< Depth buffer range */
};
+static void
+viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei width,
+ GLsizei height)
+{
+ /* 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 (unsigned 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);
+ }
+}
+
/**
* Set the viewport.
* \sa Called via glViewport() or display list execution.
@@ -95,7 +121,6 @@ struct gl_depthrange_inputs {
void GLAPIENTRY
_mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei height)
{
- unsigned i;
GET_CURRENT_CONTEXT(ctx);
FLUSH_VERTICES(ctx, 0);
@@ -108,26 +133,7 @@ _mesa_Viewport(GLint x, GLint y, GLsizei width, GLsizei 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);
- }
+ viewport(ctx, x, y, width, height);
}
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