Commit 0705fa35 authored by Dave Airlie's avatar Dave Airlie

st/mesa: add support for GL_ARB_viewport_array (v0.2)

this just ties the mesa code to the pre-existing gallium interface,
I'm not sure what to do with the CSO stuff yet.

0.2: fix min/max bounds
Acked-by: Ilia Mirkin's avatarIlia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent c116ee60
......@@ -43,51 +43,56 @@
static void
update_scissor( struct st_context *st )
{
struct pipe_scissor_state scissor;
struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
const struct gl_context *ctx = st->ctx;
const struct gl_framebuffer *fb = ctx->DrawBuffer;
GLint miny, maxy;
int i;
bool changed = false;
for (i = 0 ; i < ctx->Const.MaxViewports; i++) {
scissor[i].minx = 0;
scissor[i].miny = 0;
scissor[i].maxx = fb->Width;
scissor[i].maxy = fb->Height;
scissor.minx = 0;
scissor.miny = 0;
scissor.maxx = fb->Width;
scissor.maxy = fb->Height;
if (ctx->Scissor.EnableFlags & (1 << i)) {
/* need to be careful here with xmax or ymax < 0 */
GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[i].X + ctx->Scissor.ScissorArray[i].Width);
GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[i].Y + ctx->Scissor.ScissorArray[i].Height);
if (ctx->Scissor.EnableFlags & 1) {
/* need to be careful here with xmax or ymax < 0 */
GLint xmax = MAX2(0, ctx->Scissor.ScissorArray[0].X + ctx->Scissor.ScissorArray[0].Width);
GLint ymax = MAX2(0, ctx->Scissor.ScissorArray[0].Y + ctx->Scissor.ScissorArray[0].Height);
if (ctx->Scissor.ScissorArray[i].X > (GLint)scissor[i].minx)
scissor[i].minx = ctx->Scissor.ScissorArray[i].X;
if (ctx->Scissor.ScissorArray[i].Y > (GLint)scissor[i].miny)
scissor[i].miny = ctx->Scissor.ScissorArray[i].Y;
if (ctx->Scissor.ScissorArray[0].X > (GLint)scissor.minx)
scissor.minx = ctx->Scissor.ScissorArray[0].X;
if (ctx->Scissor.ScissorArray[0].Y > (GLint)scissor.miny)
scissor.miny = ctx->Scissor.ScissorArray[0].Y;
if (xmax < (GLint) scissor[i].maxx)
scissor[i].maxx = xmax;
if (ymax < (GLint) scissor[i].maxy)
scissor[i].maxy = ymax;
/* check for null space */
if (scissor[i].minx >= scissor[i].maxx || scissor[i].miny >= scissor[i].maxy)
scissor[i].minx = scissor[i].miny = scissor[i].maxx = scissor[i].maxy = 0;
}
if (xmax < (GLint) scissor.maxx)
scissor.maxx = xmax;
if (ymax < (GLint) scissor.maxy)
scissor.maxy = ymax;
/* Now invert Y if needed.
* Gallium drivers use the convention Y=0=top for surfaces.
*/
if (st_fb_orientation(fb) == Y_0_TOP) {
miny = fb->Height - scissor[i].maxy;
maxy = fb->Height - scissor[i].miny;
scissor[i].miny = miny;
scissor[i].maxy = maxy;
}
/* check for null space */
if (scissor.minx >= scissor.maxx || scissor.miny >= scissor.maxy)
scissor.minx = scissor.miny = scissor.maxx = scissor.maxy = 0;
}
/* Now invert Y if needed.
* Gallium drivers use the convention Y=0=top for surfaces.
*/
if (st_fb_orientation(fb) == Y_0_TOP) {
miny = fb->Height - scissor.maxy;
maxy = fb->Height - scissor.miny;
scissor.miny = miny;
scissor.maxy = maxy;
}
if (memcmp(&scissor, &st->state.scissor, sizeof(scissor)) != 0) {
/* state has changed */
st->state.scissor = scissor; /* struct copy */
st->pipe->set_scissor_states(st->pipe, 0, 1, &scissor); /* activate */
if (memcmp(&scissor[i], &st->state.scissor[i], sizeof(scissor)) != 0) {
/* state has changed */
st->state.scissor[i] = scissor[i]; /* struct copy */
changed = true;
}
}
if (changed)
st->pipe->set_scissor_states(st->pipe, 0, ctx->Const.MaxViewports, scissor); /* activate */
}
......
......@@ -43,7 +43,7 @@ update_viewport( struct st_context *st )
{
struct gl_context *ctx = st->ctx;
GLfloat yScale, yBias;
int i;
/* _NEW_BUFFERS
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
......@@ -61,26 +61,29 @@ update_viewport( struct st_context *st )
/* _NEW_VIEWPORT
*/
for (i = 0; i < ctx->Const.MaxViewports; i++)
{
GLfloat x = ctx->ViewportArray[0].X;
GLfloat y = ctx->ViewportArray[0].Y;
GLfloat z = ctx->ViewportArray[0].Near;
GLfloat half_width = ctx->ViewportArray[0].Width * 0.5f;
GLfloat half_height = ctx->ViewportArray[0].Height * 0.5f;
GLfloat half_depth = (GLfloat)(ctx->ViewportArray[0].Far - ctx->ViewportArray[0].Near) * 0.5f;
GLfloat x = ctx->ViewportArray[i].X;
GLfloat y = ctx->ViewportArray[i].Y;
GLfloat z = ctx->ViewportArray[i].Near;
GLfloat half_width = ctx->ViewportArray[i].Width * 0.5f;
GLfloat half_height = ctx->ViewportArray[i].Height * 0.5f;
GLfloat half_depth = (GLfloat)(ctx->ViewportArray[i].Far - ctx->ViewportArray[i].Near) * 0.5f;
st->state.viewport.scale[0] = half_width;
st->state.viewport.scale[1] = half_height * yScale;
st->state.viewport.scale[2] = half_depth;
st->state.viewport.scale[3] = 1.0;
st->state.viewport.translate[0] = half_width + x;
st->state.viewport.translate[1] = (half_height + y) * yScale + yBias;
st->state.viewport.translate[2] = half_depth + z;
st->state.viewport.translate[3] = 0.0;
st->state.viewport[i].scale[0] = half_width;
st->state.viewport[i].scale[1] = half_height * yScale;
st->state.viewport[i].scale[2] = half_depth;
st->state.viewport[i].scale[3] = 1.0;
cso_set_viewport(st->cso_context, &st->state.viewport);
st->state.viewport[i].translate[0] = half_width + x;
st->state.viewport[i].translate[1] = (half_height + y) * yScale + yBias;
st->state.viewport[i].translate[2] = half_depth + z;
st->state.viewport[i].translate[3] = 0.0;
}
cso_set_viewport(st->cso_context, &st->state.viewport[0]);
if (ctx->Const.MaxViewports > 1)
st->pipe->set_viewport_states(st->pipe, 1, ctx->Const.MaxViewports - 1, &st->state.viewport[1]);
}
......
......@@ -115,8 +115,8 @@ struct st_context
unsigned size;
} constants[PIPE_SHADER_TYPES];
struct pipe_framebuffer_state framebuffer;
struct pipe_scissor_state scissor;
struct pipe_viewport_state viewport;
struct pipe_scissor_state scissor[PIPE_MAX_VIEWPORTS];
struct pipe_viewport_state viewport[PIPE_MAX_VIEWPORTS];
unsigned sample_mask;
GLuint poly_stipple[32]; /**< In OpenGL's bottom-to-top order */
......
......@@ -156,7 +156,7 @@ st_feedback_draw_vbo(struct gl_context *ctx,
* code sends state updates to the pipe, not to our private draw module.
*/
assert(draw);
draw_set_viewport_states(draw, 0, 1, &st->state.viewport);
draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
draw_set_clip_state(draw, &st->state.clip);
draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
......
......@@ -779,4 +779,13 @@ void st_init_extensions(struct st_context *st)
if (!ctx->Extensions.EXT_transform_feedback)
ctx->Const.DisableVaryingPacking = GL_TRUE;
}
if (ctx->API == API_OPENGL_CORE) {
ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
if (ctx->Const.MaxViewports >= 16) {
ctx->Const.ViewportBounds.Min = -(float)ctx->Const.MaxViewportWidth;
ctx->Const.ViewportBounds.Max = ctx->Const.MaxViewportWidth;
ctx->Extensions.ARB_viewport_array = GL_TRUE;
}
}
}
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