static void
viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei width,
GLsizei height)
{
struct gl_viewport_inputs input = { x, y, width, height };
/* Clamp the viewport to the implementation dependent values. */
clamp_viewport(ctx, &input.X, &input.Y, &input.Width, &input.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, input.X, input.Y, input.Width, input.Height);
if (ctx->Driver.Viewport)
ctx->Driver.Viewport(ctx);
}
/**
* Set new viewport parameters and update derived state.
* 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, unsigned idx, GLfloat x, GLfloat y,
GLfloat width, GLfloat height)
{
set_viewport_no_notify(ctx, idx, x, y, width, height);
if (ctx->Driver.Viewport)
ctx->Driver.Viewport(ctx);
}
static void
viewport_array(struct gl_context *ctx, GLuint first, GLsizei count,
const struct gl_viewport_inputs *inputs)
{
for (GLsizei i = 0; i < count; i++) {
set_viewport_no_notify(ctx, i + first, inputs[i].X, inputs[i].Y,
inputs[i].Width, inputs[i].Height);
}
if (ctx->Driver.Viewport)
ctx->Driver.Viewport(ctx);
}
