diff options
Diffstat (limited to 'src/mesa/main/viewport.c')
| -rw-r--r-- | src/mesa/main/viewport.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/mesa/main/viewport.c b/src/mesa/main/viewport.c index 07ca920098f..6545bf68a77 100644 --- a/src/mesa/main/viewport.c +++ b/src/mesa/main/viewport.c @@ -43,6 +43,21 @@ set_viewport_no_notify(struct gl_context *ctx, unsigned idx, 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; @@ -65,6 +80,15 @@ set_viewport_no_notify(struct gl_context *ctx, unsigned idx, #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. * \sa Called via glViewport() or display list execution. @@ -135,6 +159,85 @@ _mesa_set_viewport(struct gl_context *ctx, unsigned idx, GLfloat x, GLfloat y, } } +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, "glViewportArrayv %d %d\n", first, count); + + 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; + } + + /* 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); +} + +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) @@ -217,6 +320,67 @@ _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. * \param ctx the GL context. |